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initial SH4 emulator implementation in C

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This currently only implements the SH2 instructions.
This commit is contained in:
Zack Buhman 2024-04-21 20:54:32 +08:00
parent 3de43f84bd
commit 8a300ba4c6
48 changed files with 6980 additions and 205 deletions
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2
.gitignore vendored
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@ -3,3 +3,5 @@ __pycache__
*.elf
*.bin
*.pyc
*.d
c/main

74
bitfield.py Normal file
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sr_bits = (
("T" , 0 , 1), # true/false condition
("S" , 1 , 1), # saturation
("IMASK", 4 , 4), # interrupt mask level, 4 bits
("Q" , 8 , 1), # state for divide step
("M" , 9 , 1), # state for divide step
("FD" , 15, 1), # FPU disable
("BL" , 28, 1), # Exception/interrupt block bit
("RB" , 29, 1), # General register bank specifier in privileged mode
("MD" , 30, 1), # Processor mode
)
#define FPSCR__RM (1 << 0 ) /* Rounding mode */
#define FPSCR__FLAG_INEXACT (1 << 2 )
#define FPSCR__FLAG_UNDERFLOW (1 << 3 )
#define FPSCR__FLAG_OVERFLOW (1 << 4 )
#define FPSCR__FLAG_DIVISION_BY_ZERO (1 << 5 )
#define FPSCR__FLAG_INVALID_OPERATION (1 << 6 )
#define FPSCR__ENABLE_INEXACT (1 << 7 )
#define FPSCR__ENABLE_UNDERFLOW (1 << 8 )
#define FPSCR__ENABLE_OVERFLOW (1 << 9 )
#define FPSCR__ENABLE_DIVISION_BY_ZERO (1 << 10)
#define FPSCR__ENABLE_INVALID (1 << 11)
#define FPSCR__CAUSE_INEXACT (1 << 12)
#define FPSCR__CAUSE_UNDERFLOW (1 << 13)
#define FPSCR__CAUSE_OVERFLOW (1 << 14)
#define FPSCR__CAUSE_DIVISION_BY_ZERO (1 << 15)
#define FPSCR__CAUSE_INVALID (1 << 16)
#define FPSCR__CAUSE_FPU_ERROR (1 << 17)
#define FPSCR__DN (1 << 18) /* Denormalization mode */
#define FPSCR__PR (1 << 19) /* Precision mode */
#define FPSCR__SZ (1 << 20) /* Transfer size mode */
#define FPSCR__FR (1 << 21) /* Floating-point register bank */
def generate_bitfield(bits, start=0, end=31):
res = 0
current = start
for name, index, length in bits:
if index != current:
size = index - current
yield f"_res{res}", size
res += 1
yield name, length
current = index + 1
end_len = end + 1
if current != end_len:
yield f"_res{res}", end_len - current
def generate_bitfield_little(bits):
return generate_bitfield(bits)
def generate_bitfield_big(bits):
return reversed(list(generate_bitfield(bits)))
def generate(struct_name, bits):
yield "#pragma once"
yield ""
yield "#include <stdint.h>"
yield ""
yield f"struct {struct_name} {{"
yield "#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__"
for name, size in generate_bitfield_little(bits):
yield f" uint32_t {name.lower()} : {size};"
yield "#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__"
for name, size in generate_bitfield_big(bits):
yield f" uint32_t {name.lower()} : {size};"
yield "#else"
yield '# error "unsupported endianness"'
yield "#endif"
yield "};"
if __name__ == "__main__":
print('\n'.join(generate("sr_bits", sr_bits)))

3
build.sh Normal file
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PYTHONPATH=python/ python transform.py c/impl.c c/impl.h
PYTHONPATH=python/ python generate_decoder.py c/decode_execute.c c/decode_print.c
PYTHONPATH=python/ python bitfield.py > c/sr_bits.h

30
c/Makefile Normal file
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DEBUG = -g -gdwarf-4
AFLAGS += --fatal-warnings
CFLAGS += -falign-functions=4 -ffunction-sections -fdata-sections -fshort-enums
CFLAGS += -Wall -Werror -Wfatal-errors -Wno-error=dangling-else
CFLAGS += -std=c2x
DEPFLAGS = -MMD -MP
CC = $(TARGET)gcc
OBJS = \
decode_execute.o \
decode_print.o \
exception.o \
execute.o \
impl.o \
main.o \
ram.o
all: main
%.o: %.c
$(CC) $(CARCH) $(CFLAGS) $(OPT) $(DEBUG) $(DEPFLAGS) -MF ${<}.d -c $< -o $@
main: $(OBJS)
$(CC) $^ -o $@
-include $(shell find -type f -name '*.d')

6
c/decode.h Normal file
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#pragma once
enum decode_status {
DECODE__DEFINED,
DECODE__UNDEFINED
};

937
c/decode_execute.c Normal file
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#include "decode_execute.h"
#include "impl.h"
enum decode_status decode_and_execute_instruction(struct architectural_state * state, struct memory_map * map, uint16_t code)
{
switch (code & 0b1111000000000000) {
case 0b0001000000000000: // MOV.L Rm,@(disp,Rn)
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t d = (code >> 0) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
mov_l__store_register_indirect_with_displacement(state, map, m, d, n);
return DECODE__DEFINED;
}
case 0b0101000000000000: // MOV.L @(disp,Rm),Rn
{
uint32_t d = (code >> 0) & ((1 << 4) - 1);
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
mov_l__load_register_indirect_with_displacement(state, map, d, m, n);
return DECODE__DEFINED;
}
case 0b0111000000000000: // ADD #imm,Rn
{
uint32_t i = (code >> 0) & ((1 << 8) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
add__immediate(state, map, i, n);
return DECODE__DEFINED;
}
case 0b1001000000000000: // MOV.W @(disp,PC),Rn
{
uint32_t d = (code >> 0) & ((1 << 8) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
mov_w__pc_relative_with_displacement(state, map, d, n);
return DECODE__DEFINED;
}
case 0b1010000000000000: // BRA label
{
uint32_t d = (code >> 0) & ((1 << 12) - 1);
bra__pc_relative(state, map, d);
return DECODE__DEFINED;
}
case 0b1011000000000000: // BSR label
{
uint32_t d = (code >> 0) & ((1 << 12) - 1);
bsr__pc_relative(state, map, d);
return DECODE__DEFINED;
}
case 0b1101000000000000: // MOV.L @(disp,PC),Rn
{
uint32_t d = (code >> 0) & ((1 << 8) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
mov_l__pc_relative_with_displacement(state, map, d, n);
return DECODE__DEFINED;
}
case 0b1110000000000000: // MOV #imm,Rn
{
uint32_t i = (code >> 0) & ((1 << 8) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
mov__immediate(state, map, i, n);
return DECODE__DEFINED;
}
}
switch (code & 0b1111000000001111) {
case 0b0000000000000100: // MOV.B Rm,@(R0,Rn)
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
mov_b__store_indexed_register_indirect(state, map, m, n);
return DECODE__DEFINED;
}
case 0b0000000000000101: // MOV.W Rm,@(R0,Rn)
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
mov_w__store_indexed_register_indirect(state, map, m, n);
return DECODE__DEFINED;
}
case 0b0000000000000110: // MOV.L Rm,@(R0,Rn)
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
mov_l__store_indexed_register_indirect(state, map, m, n);
return DECODE__DEFINED;
}
case 0b0000000000000111: // MUL.L Rm,Rn
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
mul_l__source_and_destination_operands(state, map, m, n);
return DECODE__DEFINED;
}
case 0b0000000000001100: // MOV.B @(R0,Rm),Rn
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
mov_b__load_indexed_register_indirect(state, map, m, n);
return DECODE__DEFINED;
}
case 0b0000000000001101: // MOV.W @(R0,Rm),Rn
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
mov_w__load_indexed_register_indirect(state, map, m, n);
return DECODE__DEFINED;
}
case 0b0000000000001110: // MOV.L @(R0,Rm),Rn
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
mov_l__load_indexed_register_indirect(state, map, m, n);
return DECODE__DEFINED;
}
case 0b0000000000001111: // MAC.L @Rm+,@Rn+
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
mac_l__multiply_and_accumulate_operation(state, map, m, n);
return DECODE__DEFINED;
}
case 0b0010000000000000: // MOV.B Rm,@Rn
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
mov_b__store_register_direct_data_transfer(state, map, m, n);
return DECODE__DEFINED;
}
case 0b0010000000000001: // MOV.W Rm,@Rn
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
mov_w__store_register_direct_data_transfer(state, map, m, n);
return DECODE__DEFINED;
}
case 0b0010000000000010: // MOV.L Rm,@Rn
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
mov_l__store_register_direct_data_transfer(state, map, m, n);
return DECODE__DEFINED;
}
case 0b0010000000000100: // MOV.B Rm,@-Rn
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
mov_b__store_direct_data_transfer_from_register(state, map, m, n);
return DECODE__DEFINED;
}
case 0b0010000000000101: // MOV.W Rm,@-Rn
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
mov_w__store_direct_data_transfer_from_register(state, map, m, n);
return DECODE__DEFINED;
}
case 0b0010000000000110: // MOV.L Rm,@-Rn
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
mov_l__store_direct_data_transfer_from_register(state, map, m, n);
return DECODE__DEFINED;
}
case 0b0010000000000111: // DIV0S Rm,Rn
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
div0s__source_and_destination_operands(state, map, m, n);
return DECODE__DEFINED;
}
case 0b0010000000001000: // TST Rm,Rn
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
tst__source_and_destination_operands(state, map, m, n);
return DECODE__DEFINED;
}
case 0b0010000000001001: // AND Rm,Rn
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
and__source_and_destination_operands(state, map, m, n);
return DECODE__DEFINED;
}
case 0b0010000000001010: // XOR Rm,Rn
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
xor__source_and_destination_operands(state, map, m, n);
return DECODE__DEFINED;
}
case 0b0010000000001011: // OR Rm,Rn
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
or__source_and_destination_operands(state, map, m, n);
return DECODE__DEFINED;
}
case 0b0010000000001100: // CMP/STR Rm,Rn
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
cmp_str__source_and_destination_operands(state, map, m, n);
return DECODE__DEFINED;
}
case 0b0010000000001101: // XTRCT Rm,Rn
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
xtrct__source_and_destination_operands(state, map, m, n);
return DECODE__DEFINED;
}
case 0b0010000000001110: // MULU.W Rm,Rn
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
mulu_w__source_and_destination_operands(state, map, m, n);
return DECODE__DEFINED;
}
case 0b0010000000001111: // MULS.W Rm,Rn
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
muls_w__source_and_destination_operands(state, map, m, n);
return DECODE__DEFINED;
}
case 0b0011000000000000: // CMP/EQ Rm,Rn
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
cmp_eq__source_and_destination_operands(state, map, m, n);
return DECODE__DEFINED;
}
case 0b0011000000000010: // CMP/HS Rm,Rn
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
cmp_hs__source_and_destination_operands(state, map, m, n);
return DECODE__DEFINED;
}
case 0b0011000000000011: // CMP/GE Rm,Rn
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
cmp_ge__source_and_destination_operands(state, map, m, n);
return DECODE__DEFINED;
}
case 0b0011000000000100: // DIV1 Rm,Rn
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
div1__source_and_destination_operands(state, map, m, n);
return DECODE__DEFINED;
}
case 0b0011000000000101: // DMULU.L Rm,Rn
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
dmulu_l__source_and_destination_operands(state, map, m, n);
return DECODE__DEFINED;
}
case 0b0011000000000110: // CMP/HI Rm,Rn
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
cmp_hi__source_and_destination_operands(state, map, m, n);
return DECODE__DEFINED;
}
case 0b0011000000000111: // CMP/GT Rm,Rn
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
cmp_gt__source_and_destination_operands(state, map, m, n);
return DECODE__DEFINED;
}
case 0b0011000000001000: // SUB Rm,Rn
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
sub__source_and_destination_operands(state, map, m, n);
return DECODE__DEFINED;
}
case 0b0011000000001010: // SUBC Rm,Rn
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
subc__source_and_destination_operands(state, map, m, n);
return DECODE__DEFINED;
}
case 0b0011000000001011: // SUBV Rm,Rn
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
subv__source_and_destination_operands(state, map, m, n);
return DECODE__DEFINED;
}
case 0b0011000000001100: // ADD Rm,Rn
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
add__source_and_destination_operands(state, map, m, n);
return DECODE__DEFINED;
}
case 0b0011000000001101: // DMULS.L Rm,Rn
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
dmuls_l__source_and_destination_operands(state, map, m, n);
return DECODE__DEFINED;
}
case 0b0011000000001110: // ADDC Rm,Rn
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
addc__source_and_destination_operands(state, map, m, n);
return DECODE__DEFINED;
}
case 0b0011000000001111: // ADDV Rm,Rn
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
addv__source_and_destination_operands(state, map, m, n);
return DECODE__DEFINED;
}
case 0b0100000000001111: // MAC.W @Rm+,@Rn+
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
mac_w__multiply_and_accumulate_operation(state, map, m, n);
return DECODE__DEFINED;
}
case 0b0110000000000000: // MOV.B @Rm,Rn
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
mov_b__load_register_direct_data_transfer(state, map, m, n);
return DECODE__DEFINED;
}
case 0b0110000000000001: // MOV.W @Rm,Rn
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
mov_w__load_register_direct_data_transfer(state, map, m, n);
return DECODE__DEFINED;
}
case 0b0110000000000010: // MOV.L @Rm,Rn
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
mov_l__load_register_direct_data_transfer(state, map, m, n);
return DECODE__DEFINED;
}
case 0b0110000000000011: // MOV Rm,Rn
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
mov__source_and_destination_operands(state, map, m, n);
return DECODE__DEFINED;
}
case 0b0110000000000100: // MOV.B @Rm+,Rn
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
mov_b__load_direct_data_transfer_from_register(state, map, m, n);
return DECODE__DEFINED;
}
case 0b0110000000000101: // MOV.W @Rm+,Rn
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
mov_w__load_direct_data_transfer_from_register(state, map, m, n);
return DECODE__DEFINED;
}
case 0b0110000000000110: // MOV.L @Rm+,Rn
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
mov_l__load_direct_data_transfer_from_register(state, map, m, n);
return DECODE__DEFINED;
}
case 0b0110000000000111: // NOT Rm,Rn
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
not__source_and_destination_operands(state, map, m, n);
return DECODE__DEFINED;
}
case 0b0110000000001000: // SWAP.B Rm,Rn
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
swap_b__source_and_destination_operands(state, map, m, n);
return DECODE__DEFINED;
}
case 0b0110000000001001: // SWAP.W Rm,Rn
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
swap_w__source_and_destination_operands(state, map, m, n);
return DECODE__DEFINED;
}
case 0b0110000000001010: // NEGC Rm,Rn
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
negc__source_and_destination_operands(state, map, m, n);
return DECODE__DEFINED;
}
case 0b0110000000001011: // NEG Rm,Rn
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
neg__source_and_destination_operands(state, map, m, n);
return DECODE__DEFINED;
}
case 0b0110000000001100: // EXTU.B Rm,Rn
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
extu_b__source_and_destination_operands(state, map, m, n);
return DECODE__DEFINED;
}
case 0b0110000000001101: // EXTU.W Rm,Rn
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
extu_w__source_and_destination_operands(state, map, m, n);
return DECODE__DEFINED;
}
case 0b0110000000001110: // EXTS.B Rm,Rn
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
exts_b__source_and_destination_operands(state, map, m, n);
return DECODE__DEFINED;
}
case 0b0110000000001111: // EXTS.W Rm,Rn
{
uint32_t m = (code >> 4) & ((1 << 4) - 1);
uint32_t n = (code >> 8) & ((1 << 4) - 1);
exts_w__source_and_destination_operands(state, map, m, n);
return DECODE__DEFINED;
}
}
switch (code & 0b1111111100000000) {
case 0b1000000000000000: // MOV.B R0,@(disp,Rn)
{
uint32_t d = (code >> 0) & ((1 << 4) - 1);
uint32_t n = (code >> 4) & ((1 << 4) - 1);
mov_b__store_register_indirect_with_displacement(state, map, d, n);
return DECODE__DEFINED;
}
case 0b1000000100000000: // MOV.W R0,@(disp,Rn)
{
uint32_t d = (code >> 0) & ((1 << 4) - 1);
uint32_t n = (code >> 4) & ((1 << 4) - 1);
mov_w__store_register_indirect_with_displacement(state, map, d, n);
return DECODE__DEFINED;
}
case 0b1000010000000000: // MOV.B @(disp,Rm),R0
{
uint32_t d = (code >> 0) & ((1 << 4) - 1);
uint32_t m = (code >> 4) & ((1 << 4) - 1);
mov_b__load_register_indirect_with_displacement(state, map, d, m);
return DECODE__DEFINED;
}
case 0b1000010100000000: // MOV.W @(disp,Rm),R0
{
uint32_t d = (code >> 0) & ((1 << 4) - 1);
uint32_t m = (code >> 4) & ((1 << 4) - 1);
mov_w__load_register_indirect_with_displacement(state, map, d, m);
return DECODE__DEFINED;
}
case 0b1000100000000000: // CMP/EQ #imm,R0
{
uint32_t i = (code >> 0) & ((1 << 8) - 1);
cmp_eq__immediate(state, map, i);
return DECODE__DEFINED;
}
case 0b1000100100000000: // BT label
{
uint32_t d = (code >> 0) & ((1 << 8) - 1);
bt__pc_relative(state, map, d);
return DECODE__DEFINED;
}
case 0b1000101100000000: // BF label
{
uint32_t d = (code >> 0) & ((1 << 8) - 1);
bf__pc_relative(state, map, d);
return DECODE__DEFINED;
}
case 0b1000110100000000: // BT/S label
{
uint32_t d = (code >> 0) & ((1 << 8) - 1);
bt_s__pc_relative(state, map, d);
return DECODE__DEFINED;
}
case 0b1000111100000000: // BF/S label
{
uint32_t d = (code >> 0) & ((1 << 8) - 1);
bf_s__pc_relative(state, map, d);
return DECODE__DEFINED;
}
case 0b1100000000000000: // MOV.B R0,@(disp,GBR)
{
uint32_t d = (code >> 0) & ((1 << 8) - 1);
mov_b__store_gbr_indirect_with_displacement(state, map, d);
return DECODE__DEFINED;
}
case 0b1100000100000000: // MOV.W R0,@(disp,GBR)
{
uint32_t d = (code >> 0) & ((1 << 8) - 1);
mov_w__store_gbr_indirect_with_displacement(state, map, d);
return DECODE__DEFINED;
}
case 0b1100001000000000: // MOV.L R0,@(disp,GBR)
{
uint32_t d = (code >> 0) & ((1 << 8) - 1);
mov_l__store_gbr_indirect_with_displacement(state, map, d);
return DECODE__DEFINED;
}
case 0b1100001100000000: // TRAPA #imm
{
uint32_t i = (code >> 0) & ((1 << 8) - 1);
trapa__immediate(state, map, i);
return DECODE__DEFINED;
}
case 0b1100010000000000: // MOV.B @(disp,GBR),R0
{
uint32_t d = (code >> 0) & ((1 << 8) - 1);
mov_b__load_gbr_indirect_with_displacement(state, map, d);
return DECODE__DEFINED;
}
case 0b1100010100000000: // MOV.W @(disp,GBR),R0
{
uint32_t d = (code >> 0) & ((1 << 8) - 1);
mov_w__load_gbr_indirect_with_displacement(state, map, d);
return DECODE__DEFINED;
}
case 0b1100011000000000: // MOV.L @(disp,GBR),R0
{
uint32_t d = (code >> 0) & ((1 << 8) - 1);
mov_l__load_gbr_indirect_with_displacement(state, map, d);
return DECODE__DEFINED;
}
case 0b1100011100000000: // MOVA @(disp,PC),R0
{
uint32_t d = (code >> 0) & ((1 << 8) - 1);
mova__pc_relative_with_displacement(state, map, d);
return DECODE__DEFINED;
}
case 0b1100100000000000: // TST #imm,R0
{
uint32_t i = (code >> 0) & ((1 << 8) - 1);
tst__immediate(state, map, i);
return DECODE__DEFINED;
}
case 0b1100100100000000: // AND #imm,R0
{
uint32_t i = (code >> 0) & ((1 << 8) - 1);
and__immediate(state, map, i);
return DECODE__DEFINED;
}
case 0b1100101000000000: // XOR #imm,R0
{
uint32_t i = (code >> 0) & ((1 << 8) - 1);
xor__immediate(state, map, i);
return DECODE__DEFINED;
}
case 0b1100101100000000: // OR #imm,R0
{
uint32_t i = (code >> 0) & ((1 << 8) - 1);
or__immediate(state, map, i);
return DECODE__DEFINED;
}
case 0b1100110000000000: // TST.B #imm,@(R0,GBR)
{
uint32_t i = (code >> 0) & ((1 << 8) - 1);
tst_b__store_indexed_gbr_indirect(state, map, i);
return DECODE__DEFINED;
}
case 0b1100110100000000: // AND.B #imm,@(R0,GBR)
{
uint32_t i = (code >> 0) & ((1 << 8) - 1);
and_b__store_indexed_gbr_indirect(state, map, i);
return DECODE__DEFINED;
}
case 0b1100111000000000: // XOR.B #imm,@(R0,GBR)
{
uint32_t i = (code >> 0) & ((1 << 8) - 1);
xor_b__store_indexed_gbr_indirect(state, map, i);
return DECODE__DEFINED;
}
case 0b1100111100000000: // OR.B #imm,@(R0,GBR)
{
uint32_t i = (code >> 0) & ((1 << 8) - 1);
or_b__store_indexed_gbr_indirect(state, map, i);
return DECODE__DEFINED;
}
}
switch (code & 0b1111000011111111) {
case 0b0000000000000010: // STC SR,Rn
{
uint32_t n = (code >> 8) & ((1 << 4) - 1);
stc__transfer_from_sr(state, map, n);
return DECODE__DEFINED;
}
case 0b0000000000000011: // BSRF Rn
{
uint32_t n = (code >> 8) & ((1 << 4) - 1);
bsrf__destination_operand_only(state, map, n);
return DECODE__DEFINED;
}
case 0b0000000000001010: // STS MACH,Rn
{
uint32_t n = (code >> 8) & ((1 << 4) - 1);
sts__transfer_from_mach(state, map, n);
return DECODE__DEFINED;
}
case 0b0000000000010010: // STC GBR,Rn
{
uint32_t n = (code >> 8) & ((1 << 4) - 1);
stc__transfer_from_gbr(state, map, n);
return DECODE__DEFINED;
}
case 0b0000000000011010: // STS MACL,Rn
{
uint32_t n = (code >> 8) & ((1 << 4) - 1);
sts__transfer_from_macl(state, map, n);
return DECODE__DEFINED;
}
case 0b0000000000100010: // STC VBR,Rn
{
uint32_t n = (code >> 8) & ((1 << 4) - 1);
stc__transfer_from_vbr(state, map, n);
return DECODE__DEFINED;
}
case 0b0000000000100011: // BRAF Rn
{
uint32_t n = (code >> 8) & ((1 << 4) - 1);
braf__destination_operand_only(state, map, n);
return DECODE__DEFINED;
}
case 0b0000000000101001: // MOVT Rn
{
uint32_t n = (code >> 8) & ((1 << 4) - 1);
movt__destination_operand_only(state, map, n);
return DECODE__DEFINED;
}
case 0b0000000000101010: // STS PR,Rn
{
uint32_t n = (code >> 8) & ((1 << 4) - 1);
sts__transfer_from_pr(state, map, n);
return DECODE__DEFINED;
}
case 0b0100000000000000: // SHLL Rn
{
uint32_t n = (code >> 8) & ((1 << 4) - 1);
shll__destination_operand_only(state, map, n);
return DECODE__DEFINED;
}
case 0b0100000000000001: // SHLR Rn
{
uint32_t n = (code >> 8) & ((1 << 4) - 1);
shlr__destination_operand_only(state, map, n);
return DECODE__DEFINED;
}
case 0b0100000000000010: // STS.L MACH,@-Rn
{
uint32_t n = (code >> 8) & ((1 << 4) - 1);
sts_l__store_from_mach(state, map, n);
return DECODE__DEFINED;
}
case 0b0100000000000011: // STC.L SR,@-Rn
{
uint32_t n = (code >> 8) & ((1 << 4) - 1);
stc_l__store_from_sr(state, map, n);
return DECODE__DEFINED;
}
case 0b0100000000000100: // ROTL Rn
{
uint32_t n = (code >> 8) & ((1 << 4) - 1);
rotl__destination_operand_only(state, map, n);
return DECODE__DEFINED;
}
case 0b0100000000000101: // ROTR Rn
{
uint32_t n = (code >> 8) & ((1 << 4) - 1);
rotr__destination_operand_only(state, map, n);
return DECODE__DEFINED;
}
case 0b0100000000000110: // LDS.L @Rm+,MACH
{
uint32_t m = (code >> 8) & ((1 << 4) - 1);
lds_l__load_to_mach(state, map, m);
return DECODE__DEFINED;
}
case 0b0100000000000111: // LDC.L @Rm+,SR
{
uint32_t m = (code >> 8) & ((1 << 4) - 1);
ldc_l__load_to_sr(state, map, m);
return DECODE__DEFINED;
}
case 0b0100000000001000: // SHLL2 Rn
{
uint32_t n = (code >> 8) & ((1 << 4) - 1);
shll2__destination_operand_only(state, map, n);
return DECODE__DEFINED;
}
case 0b0100000000001001: // SHLR2 Rn
{
uint32_t n = (code >> 8) & ((1 << 4) - 1);
shlr2__destination_operand_only(state, map, n);
return DECODE__DEFINED;
}
case 0b0100000000001010: // LDS Rm,MACH
{
uint32_t m = (code >> 8) & ((1 << 4) - 1);
lds__transfer_to_mach(state, map, m);
return DECODE__DEFINED;
}
case 0b0100000000001011: // JSR @Rn
{
uint32_t n = (code >> 8) & ((1 << 4) - 1);
jsr__destination_operand_only(state, map, n);
return DECODE__DEFINED;
}
case 0b0100000000001110: // LDC Rm,SR
{
uint32_t m = (code >> 8) & ((1 << 4) - 1);
ldc__transfer_to_sr(state, map, m);
return DECODE__DEFINED;
}
case 0b0100000000010000: // DT Rn
{
uint32_t n = (code >> 8) & ((1 << 4) - 1);
dt__destination_operand_only(state, map, n);
return DECODE__DEFINED;
}
case 0b0100000000010001: // CMP/PZ Rn
{
uint32_t n = (code >> 8) & ((1 << 4) - 1);
cmp_pz__destination_operand_only(state, map, n);
return DECODE__DEFINED;
}
case 0b0100000000010010: // STS.L MACL,@-Rn
{
uint32_t n = (code >> 8) & ((1 << 4) - 1);
sts_l__store_from_macl(state, map, n);
return DECODE__DEFINED;
}
case 0b0100000000010011: // STC.L GBR,@-Rn
{
uint32_t n = (code >> 8) & ((1 << 4) - 1);
stc_l__store_from_gbr(state, map, n);
return DECODE__DEFINED;
}
case 0b0100000000010101: // CMP/PL Rn
{
uint32_t n = (code >> 8) & ((1 << 4) - 1);
cmp_pl__destination_operand_only(state, map, n);
return DECODE__DEFINED;
}
case 0b0100000000010110: // LDS.L @Rm+,MACL
{
uint32_t m = (code >> 8) & ((1 << 4) - 1);
lds_l__load_to_macl(state, map, m);
return DECODE__DEFINED;
}
case 0b0100000000010111: // LDC.L @Rm+,GBR
{
uint32_t m = (code >> 8) & ((1 << 4) - 1);
ldc_l__load_to_gbr(state, map, m);
return DECODE__DEFINED;
}
case 0b0100000000011000: // SHLL8 Rn
{
uint32_t n = (code >> 8) & ((1 << 4) - 1);
shll8__destination_operand_only(state, map, n);
return DECODE__DEFINED;
}
case 0b0100000000011001: // SHLR8 Rn
{
uint32_t n = (code >> 8) & ((1 << 4) - 1);
shlr8__destination_operand_only(state, map, n);
return DECODE__DEFINED;
}
case 0b0100000000011010: // LDS Rm,MACL
{
uint32_t m = (code >> 8) & ((1 << 4) - 1);
lds__transfer_to_macl(state, map, m);
return DECODE__DEFINED;
}
case 0b0100000000011011: // TAS.B @Rn
{
uint32_t n = (code >> 8) & ((1 << 4) - 1);
tas_b__destination_operand_only(state, map, n);
return DECODE__DEFINED;
}
case 0b0100000000011110: // LDC Rm,GBR
{
uint32_t m = (code >> 8) & ((1 << 4) - 1);
ldc__transfer_to_gbr(state, map, m);
return DECODE__DEFINED;
}
case 0b0100000000100000: // SHAL Rn
{
uint32_t n = (code >> 8) & ((1 << 4) - 1);
shal__destination_operand_only(state, map, n);
return DECODE__DEFINED;
}
case 0b0100000000100001: // SHAR Rn
{
uint32_t n = (code >> 8) & ((1 << 4) - 1);
shar__destination_operand_only(state, map, n);
return DECODE__DEFINED;
}
case 0b0100000000100010: // STS.L PR,@-Rn
{
uint32_t n = (code >> 8) & ((1 << 4) - 1);
sts_l__store_from_pr(state, map, n);
return DECODE__DEFINED;
}
case 0b0100000000100011: // STC.L VBR,@-Rn
{
uint32_t n = (code >> 8) & ((1 << 4) - 1);
stc_l__store_from_vbr(state, map, n);
return DECODE__DEFINED;
}
case 0b0100000000100100: // ROTCL Rn
{
uint32_t n = (code >> 8) & ((1 << 4) - 1);
rotcl__destination_operand_only(state, map, n);
return DECODE__DEFINED;
}
case 0b0100000000100101: // ROTCR Rn
{
uint32_t n = (code >> 8) & ((1 << 4) - 1);
rotcr__destination_operand_only(state, map, n);
return DECODE__DEFINED;
}
case 0b0100000000100110: // LDS.L @Rm+,PR
{
uint32_t m = (code >> 8) & ((1 << 4) - 1);
lds_l__load_to_pr(state, map, m);
return DECODE__DEFINED;
}
case 0b0100000000100111: // LDC.L @Rm+,VBR
{
uint32_t m = (code >> 8) & ((1 << 4) - 1);
ldc_l__load_to_vbr(state, map, m);
return DECODE__DEFINED;
}
case 0b0100000000101000: // SHLL16 Rn
{
uint32_t n = (code >> 8) & ((1 << 4) - 1);
shll16__destination_operand_only(state, map, n);
return DECODE__DEFINED;
}
case 0b0100000000101001: // SHLR16 Rn
{
uint32_t n = (code >> 8) & ((1 << 4) - 1);
shlr16__destination_operand_only(state, map, n);
return DECODE__DEFINED;
}
case 0b0100000000101010: // LDS Rm,PR
{
uint32_t m = (code >> 8) & ((1 << 4) - 1);
lds__transfer_to_pr(state, map, m);
return DECODE__DEFINED;
}
case 0b0100000000101011: // JMP @Rn
{
uint32_t n = (code >> 8) & ((1 << 4) - 1);
jmp__destination_operand_only(state, map, n);
return DECODE__DEFINED;
}
case 0b0100000000101110: // LDC Rm,VBR
{
uint32_t m = (code >> 8) & ((1 << 4) - 1);
ldc__transfer_to_vbr(state, map, m);
return DECODE__DEFINED;
}
}
switch (code & 0b1111111111111111) {
case 0b0000000000001000: // CLRT
{
clrt__no_operand(state, map);
return DECODE__DEFINED;
}
case 0b0000000000001001: // NOP
{
nop__no_operand(state, map);
return DECODE__DEFINED;
}
case 0b0000000000001011: // RTS
{
rts__no_operand(state, map);
return DECODE__DEFINED;
}
case 0b0000000000011000: // SETT
{
sett__no_operand(state, map);
return DECODE__DEFINED;
}
case 0b0000000000011001: // DIV0U
{
div0u__no_operand(state, map);
return DECODE__DEFINED;
}
case 0b0000000000011011: // SLEEP
{
sleep__no_operand(state, map);
return DECODE__DEFINED;
}
case 0b0000000000101000: // CLRMAC
{
clrmac__no_operand(state, map);
return DECODE__DEFINED;
}
case 0b0000000000101011: // RTE
{
rte__no_operand(state, map);
return DECODE__DEFINED;
}
case 0b0000000001001000: // CLRS
{
clrs__no_operand(state, map);
return DECODE__DEFINED;
}
case 0b0000000001011000: // SETS
{
sets__no_operand(state, map);
return DECODE__DEFINED;
}
}
return DECODE__UNDEFINED;
}

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c/decode_execute.h Normal file
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#pragma once
#include <stdint.h>
#include "memory_map.h"
#include "state.h"
#include "decode.h"
enum decode_status decode_and_execute_instruction(struct architectural_state * state, struct memory_map * map, uint16_t code);

1082
c/decode_print.c Normal file
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9
c/decode_print.h Normal file
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#pragma once
#include <stdint.h>
#include "memory_map.h"
#include "state.h"
#include "decode.h"
enum decode_status decode_and_print_instruction(struct architectural_state * state, struct memory_map * map, uint16_t code, char const ** instruction_buf, char * operand_buf, uint32_t size);

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c/exception.c Normal file
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#include <stdio.h>
#include "exception.h"
#define SR state->sr.bits
#define _SR state->sr.value
#define VBR state->vbr
#define PC state->pc[0] = state->pc[1]
#define SPC state->spc
#define SSR state->ssr
#define SGR state->sgr
#define R15 state->general_register[15]
#define BL bl
#define FD fd
#define IMASK imask
#define MD md
#define RB rb
#pragma GCC diagnostic ignored "-Wunused-variable"
#define EXPEVT int32_t expevt
#define INTEVT int32_t intevt
#define TEA int32_t tea
#define TRA int32_t tra
#define EXCEPTION_ADDRESS 0
void exception(struct architectural_state * state, const char * name)
{
printf("exception: %s\n", name);
state->is_delay_slot = 0;
}
void POWERON(struct architectural_state * state)
{
exception(state, "POWERON");
//Initialize_Module(PowerOn);
EXPEVT = 0x00000000;
VBR = 0x00000000;
SR.MD = 1;
SR.RB = 1;
SR.BL = 1;
SR.IMASK = 0xF;
SR.FD = 0;
PC = 0xA0000000;
}
void MANRESET(struct architectural_state * state)
{
exception(state, "MANRESET");
//Initialize_Module(Manual);
EXPEVT = 0x00000020;
VBR = 0x00000000;
SR.MD = 1;
SR.RB = 1;
SR.BL = 1;
SR.IMASK = 0xF;
SR.FD = 0;
PC = 0xA0000000;
}
void HUIDRESET(struct architectural_state * state)
{
exception(state, "HUIDRESET");
//Initialize_Module(PowerOn);
EXPEVT = 0x00000000;
VBR = 0x00000000;
SR.MD = 1;
SR.RB = 1;
SR.BL = 1;
SR.IMASK = 0xF;
SR.FD = 0;
PC = 0xA0000000;
}
void ITLBMULTIHIT(struct architectural_state * state)
{
exception(state, "ITLBMULTIHIT");
//Initialize_Module(Manual);
TEA = EXCEPTION_ADDRESS;
//PTEH.VPN = PAGE_NUMBER;
EXPEVT = 0x00000140;
VBR = 0x00000000;
SR.MD = 1;
SR.RB = 1;
SR.BL = 1;
SR.IMASK = 0xF;
SR.FD = 0;
PC = 0xA0000000;
}
void OTLBMULTIHIT(struct architectural_state * state)
{
exception(state, "OTLBMULTIHIT");
//Initialize_Module(Manual);
TEA = EXCEPTION_ADDRESS;
//PTEH.VPN = PAGE_NUMBER;
EXPEVT = 0x00000140;
VBR = 0x00000000;
SR.MD = 1;
SR.RB = 1;
SR.BL = 1;
SR.IMASK = 0xF;
SR.FD = 0;
PC = 0xA0000000;
}
/* General exceptions */
void RTLBMISS(struct architectural_state * state, int32_t op1)
{
exception(state, "RTLBMISS");
TEA = EXCEPTION_ADDRESS;
//PTEH.VPN = PAGE_NUMBER;
SPC = PC;
SSR = _SR;
SGR = R15;
EXPEVT = 0x00000040;
SR.MD = 1;
SR.RB = 1;
SR.BL = 1;
PC = VBR + 0x00000400;
}
void WTLBMISS(struct architectural_state * state, int32_t op1)
{
exception(state, "WTLBMISS");
TEA = EXCEPTION_ADDRESS;
//PTEH.VPN = PAGE_NUMBER;
SPC = PC;
SSR = _SR;
SGR = R15;
EXPEVT = 0x00000060;
SR.MD = 1;
SR.RB = 1;
SR.BL = 1;
PC = VBR + 0x00000400;
}
void ITLBMISS(struct architectural_state * state)
{
exception(state, "ITLBMISS");
TEA = EXCEPTION_ADDRESS;
//PTEH.VPN = PAGE_NUMBER;
SPC = PC;
SSR = _SR;
SGR = R15;
EXPEVT = 0x00000040;
SR.MD = 1;
SR.RB = 1;
SR.BL = 1;
PC = VBR + 0x00000400;
}
void FIRSTWRITE(struct architectural_state * state, int32_t op1)
{
exception(state, "FIRSTWRITE");
TEA = EXCEPTION_ADDRESS;
//PTEH.VPN = PAGE_NUMBER;
SPC = PC;
SSR = _SR;
SGR = R15;
EXPEVT = 0x00000080;
SR.MD = 1;
SR.RB = 1;
SR.BL = 1;
PC = VBR + 0x00000100;
}
void READPROT(struct architectural_state * state, int32_t op1)
{
exception(state, "READPROT");
TEA = EXCEPTION_ADDRESS;
//PTEH.VPN = PAGE_NUMBER;
SPC = PC;
SSR = _SR;
SGR = R15;
EXPEVT = 0x000000A0;
SR.MD = 1;
SR.RB = 1;
SR.BL = 1;
PC = VBR + 0x00000100;
}
void WRITEPROT(struct architectural_state * state, int32_t op1)
{
exception(state, "WRITEPROT");
TEA = EXCEPTION_ADDRESS;
//PTEH.VPN = PAGE_NUMBER;
SPC = PC;
SSR = _SR;
SGR = R15;
EXPEVT = 0x000000C0;
SR.MD = 1;
SR.RB = 1;
SR.BL = 1;
PC = VBR + 0x00000100;
}
void EXECPROT(struct architectural_state * state)
{
exception(state, "EXECPROT");
TEA = EXCEPTION_ADDRESS;
//PTEH.VPN = PAGE_NUMBER;
SPC = PC;
SSR = _SR;
SGR = R15;
EXPEVT = 0x000000A0;
SR.MD = 1;
SR.RB = 1;
SR.BL = 1;
PC = VBR + 0x00000100;
}
void RADDERR(struct architectural_state * state, int32_t op1)
{
exception(state, "RADDERR");
TEA = EXCEPTION_ADDRESS;
//PTEN.VPN = PAGE_NUMBER;
SPC = PC;
SSR = _SR;
SGR = R15;
EXPEVT = 0x000000E0;
SR.MD = 1;
SR.RB = 1;
SR.BL = 1;
PC = VBR + 0x00000100;
}
void WADDERR(struct architectural_state * state, int32_t op1)
{
exception(state, "WADDERR");
TEA = EXCEPTION_ADDRESS;
//PTEN.VPN = PAGE_NUMBER;
SPC = PC;
SSR = _SR;
SGR = R15;
EXPEVT = 0x00000100;
SR.MD = 1;
SR.RB = 1;
SR.BL = 1;
PC = VBR + 0x00000100;
}
void IADDERR(struct architectural_state * state)
{
exception(state, "IADDERR");
TEA = EXCEPTION_ADDRESS;
//PTEN.VPN = PAGE_NUMBER;
SPC = PC;
SSR = _SR;
SGR = R15;
EXPEVT = 0x000000E0;
SR.MD = 1;
SR.RB = 1;
SR.BL = 1;
PC = VBR + 0x00000100;
}
void TRAP(struct architectural_state * state, int32_t imm)
{
exception(state, "TRAP");
SPC = PC + 2;
SSR = _SR;
SGR = R15;
TRA = imm << 2;
EXPEVT = 0x00000160;
SR.MD = 1;
SR.RB = 1;
SR.BL = 1;
PC = VBR + 0x00000100;
}
void RESINST(struct architectural_state * state)
{
exception(state, "RESINST");
SPC = PC;
SSR = _SR;
SGR = R15;
EXPEVT = 0x00000180;
SR.MD = 1;
SR.RB = 1;
SR.BL = 1;
PC = VBR + 0x00000100;
}
void ILLSLOT(struct architectural_state * state)
{
exception(state, "ILLSLOT");
SPC = PC - 2;
SSR = _SR;
SGR = R15;
EXPEVT = 0x000001A0;
SR.MD = 1;
SR.RB = 1;
SR.BL = 1;
PC = VBR + 0x00000100;
}
void FPUDIS(struct architectural_state * state)
{
exception(state, "FPUDIS");
SPC = PC;
SSR = _SR;
SGR = R15;
EXPEVT = 0x00000800;
SR.MD = 1;
SR.RB = 1;
SR.BL = 1;
PC = VBR + 0x00000100;
}
void SLOTFPUDIS(struct architectural_state * state)
{
exception(state, "SLOTFPUDIS");
SPC = PC - 2;
SSR = _SR;
SGR = R15;
EXPEVT = 0x00000820;
SR.MD = 1;
SR.RB = 1;
SR.BL = 1;
PC = VBR + 0x00000100;
}
void UBRKBEFORE(struct architectural_state * state)
{
exception(state, "UBRKBEFORE");
SPC = PC;
SSR = _SR;
SGR = R15;
EXPEVT = 0x000001E0;
SR.MD = 1;
SR.RB = 1;
SR.BL = 1;
//PC = (BRCR.UBDE==1 ? DBR : VBR + H00000100);
}
void UBRKAFTER(struct architectural_state * state)
{
exception(state, "UBRKAFTER");
SPC = PC + 2;
SSR = _SR;
SGR = R15;
EXPEVT = 0x000001E0;
SR.MD = 1;
SR.RB = 1;
SR.BL = 1;
//PC = (BRCR.UBDE==1 ? DBR : VBR + H00000100);
}
void FPUEXC(struct architectural_state * state)
{
exception(state, "FPUEXC");
SPC = PC;
SSR = _SR;
SGR = R15;
EXPEVT = 0x00000120;
SR.MD = 1;
SR.RB = 1;
SR.BL = 1;
PC = VBR + 0x00000100;
}
/* interrupts */
void NMI(struct architectural_state * state)
{
exception(state, "NMI");
SPC = PC;
SSR = _SR;
SGR = R15;
INTEVT = 0x000001C0;
SR.MD = 1;
SR.RB = 1;
SR.BL = 1;
PC = VBR + 0x00000600;
}
void IRLINT(struct architectural_state * state)
{
exception(state, "IRLINT");
SPC = PC;
SSR = _SR;
SGR = R15;
//INTEVT = 0x00000200 ~ 0x000003C0;
SR.MD = 1;
SR.RB = 1;
SR.BL = 1;
PC = VBR + 0x00000600;
}

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#pragma once
#include <stdint.h>
#include "state.h"
void POWERON(struct architectural_state * state);
void MANRESET(struct architectural_state * state);
void HUIDRESET(struct architectural_state * state);
void ITLBMULTIHIT(struct architectural_state * state);
void OTLBMULTIHIT(struct architectural_state * state);
void RTLBMISS(struct architectural_state * state, int32_t op1);
void WTLBMISS(struct architectural_state * state, int32_t op1);
void ITLBMISS(struct architectural_state * state);
void FIRSTWRITE(struct architectural_state * state, int32_t op1);
void READPROT(struct architectural_state * state, int32_t op1);
void WRITEPROT(struct architectural_state * state, int32_t op1);
void EXECPROT(struct architectural_state * state);
void RADDERR(struct architectural_state * state, int32_t op1);
void WADDERR(struct architectural_state * state, int32_t op1);
void IADDERR(struct architectural_state * state);
void TRAP(struct architectural_state * state, int32_t imm);
void RESINST(struct architectural_state * state);
void ILLSLOT(struct architectural_state * state);
void FPUDIS(struct architectural_state * state);
void SLOTFPUDIS(struct architectural_state * state);
void UBRKBEFORE(struct architectural_state * state);
void UBRKAFTER(struct architectural_state * state);
void FPUEXC(struct architectural_state * state);
void NMI(struct architectural_state * state);
void IRLINT(struct architectural_state * state);

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#include <assert.h>
#include "execute.h"
#include "operations.h"
#include "state_helpers.h"
#include "decode_execute.h"
#include "exception.h"
uint16_t fetch(struct architectural_state * state, struct memory_map * map)
{
uint32_t address = zero_extend32(sign_extend32(state->pc[0]));
assert((address & 0b1) == 0);
return read_memory16(map, address);
}
void step(struct architectural_state * state, struct memory_map * map)
{
/*
* 3 Fetch the instruction bytes from the address in memory, as
* indicated by the current program counter, 2 bytes need to be
* fetched for each instruction.
*/
uint16_t instruction_code = fetch(state, map);
/*
* 4 Calculate the default values of PC’ and PR’. PC’ is set to the
* value of PC”, PR’ is set to the value of PR”.
*/
state->pc[1] = state->pc[2];
state->pr[1] = state->pr[2];
/*
* 5 Calculate the default values of PC” and PR” assuming continued
* sequential execution without procedure call or mode switch: PC”
* is PC’+2, while PR” is unchanged.
*/
state->pc[2] = state->pc[1] + 2;
state->pr[2] = state->pr[2]; // unchanged
/*
* 6 Decode and execute the instruction. This includes checks for
* synchronous events, such as exceptions and panics, and
* initiation of handling if required. Synchronous events are not
* accepted between a delayed branch and a delay slot. They are
* detected either before the delayed branch or after the delay
* slot.
*/
enum decode_status status = decode_and_execute_instruction(state, map, instruction_code);
switch (status) {
case DECODE__DEFINED:
break;
case DECODE__UNDEFINED: // undefined instruction
if (state->is_delay_slot)
ILLSLOT(state);
else
RESINST(state);
break;
default:
assert(false);
break;
}
/*
* 7 Set the current program counter (PC) to the value of the next
* program counter (PC’) and PR to the value of PR’.
*/
state->pc[0] = state->pc[1];
state->pr[0] = state->pr[1];
}

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#pragma once
#include "memory_map.h"
#include "state.h"
uint16_t fetch(struct architectural_state * state, struct memory_map * map);
void step(struct architectural_state * state, struct memory_map * mem);

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#pragma once
#include "state.h"
#include "memory_map.h"
/* MOV #imm,Rn */
void mov__immediate(struct architectural_state * state, struct memory_map * map, const uint32_t i, const uint32_t n);
/* MOV.W @(disp,PC),Rn */
void mov_w__pc_relative_with_displacement(struct architectural_state * state, struct memory_map * map, const uint32_t d, const uint32_t n);
/* MOV.L @(disp,PC),Rn */
void mov_l__pc_relative_with_displacement(struct architectural_state * state, struct memory_map * map, const uint32_t d, const uint32_t n);
/* MOV Rm,Rn */
void mov__source_and_destination_operands(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* MOV.B Rm,@Rn */
void mov_b__store_register_direct_data_transfer(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* MOV.W Rm,@Rn */
void mov_w__store_register_direct_data_transfer(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* MOV.L Rm,@Rn */
void mov_l__store_register_direct_data_transfer(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* MOV.B @Rm,Rn */
void mov_b__load_register_direct_data_transfer(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* MOV.W @Rm,Rn */
void mov_w__load_register_direct_data_transfer(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* MOV.L @Rm,Rn */
void mov_l__load_register_direct_data_transfer(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* MOV.B Rm,@-Rn */
void mov_b__store_direct_data_transfer_from_register(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* MOV.W Rm,@-Rn */
void mov_w__store_direct_data_transfer_from_register(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* MOV.L Rm,@-Rn */
void mov_l__store_direct_data_transfer_from_register(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* MOV.B @Rm+,Rn */
void mov_b__load_direct_data_transfer_from_register(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* MOV.W @Rm+,Rn */
void mov_w__load_direct_data_transfer_from_register(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* MOV.L @Rm+,Rn */
void mov_l__load_direct_data_transfer_from_register(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* MOV.B R0,@(disp,Rn) */
void mov_b__store_register_indirect_with_displacement(struct architectural_state * state, struct memory_map * map, const uint32_t d, const uint32_t n);
/* MOV.W R0,@(disp,Rn) */
void mov_w__store_register_indirect_with_displacement(struct architectural_state * state, struct memory_map * map, const uint32_t d, const uint32_t n);
/* MOV.L Rm,@(disp,Rn) */
void mov_l__store_register_indirect_with_displacement(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t d, const uint32_t n);
/* MOV.B @(disp,Rm),R0 */
void mov_b__load_register_indirect_with_displacement(struct architectural_state * state, struct memory_map * map, const uint32_t d, const uint32_t m);
/* MOV.W @(disp,Rm),R0 */
void mov_w__load_register_indirect_with_displacement(struct architectural_state * state, struct memory_map * map, const uint32_t d, const uint32_t m);
/* MOV.L @(disp,Rm),Rn */
void mov_l__load_register_indirect_with_displacement(struct architectural_state * state, struct memory_map * map, const uint32_t d, const uint32_t m, const uint32_t n);
/* MOV.B Rm,@(R0,Rn) */
void mov_b__store_indexed_register_indirect(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* MOV.W Rm,@(R0,Rn) */
void mov_w__store_indexed_register_indirect(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* MOV.L Rm,@(R0,Rn) */
void mov_l__store_indexed_register_indirect(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* MOV.B @(R0,Rm),Rn */
void mov_b__load_indexed_register_indirect(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* MOV.W @(R0,Rm),Rn */
void mov_w__load_indexed_register_indirect(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* MOV.L @(R0,Rm),Rn */
void mov_l__load_indexed_register_indirect(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* MOV.B R0,@(disp,GBR) */
void mov_b__store_gbr_indirect_with_displacement(struct architectural_state * state, struct memory_map * map, const uint32_t d);
/* MOV.W R0,@(disp,GBR) */
void mov_w__store_gbr_indirect_with_displacement(struct architectural_state * state, struct memory_map * map, const uint32_t d);
/* MOV.L R0,@(disp,GBR) */
void mov_l__store_gbr_indirect_with_displacement(struct architectural_state * state, struct memory_map * map, const uint32_t d);
/* MOV.B @(disp,GBR),R0 */
void mov_b__load_gbr_indirect_with_displacement(struct architectural_state * state, struct memory_map * map, const uint32_t d);
/* MOV.W @(disp,GBR),R0 */
void mov_w__load_gbr_indirect_with_displacement(struct architectural_state * state, struct memory_map * map, const uint32_t d);
/* MOV.L @(disp,GBR),R0 */
void mov_l__load_gbr_indirect_with_displacement(struct architectural_state * state, struct memory_map * map, const uint32_t d);
/* MOVA @(disp,PC),R0 */
void mova__pc_relative_with_displacement(struct architectural_state * state, struct memory_map * map, const uint32_t d);
/* MOVT Rn */
void movt__destination_operand_only(struct architectural_state * state, struct memory_map * map, const uint32_t n);
/* SWAP.B Rm,Rn */
void swap_b__source_and_destination_operands(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* SWAP.W Rm,Rn */
void swap_w__source_and_destination_operands(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* XTRCT Rm,Rn */
void xtrct__source_and_destination_operands(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* ADD Rm,Rn */
void add__source_and_destination_operands(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* ADD #imm,Rn */
void add__immediate(struct architectural_state * state, struct memory_map * map, const uint32_t i, const uint32_t n);
/* ADDC Rm,Rn */
void addc__source_and_destination_operands(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* ADDV Rm,Rn */
void addv__source_and_destination_operands(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* CMP/EQ #imm,R0 */
void cmp_eq__immediate(struct architectural_state * state, struct memory_map * map, const uint32_t i);
/* CMP/EQ Rm,Rn */
void cmp_eq__source_and_destination_operands(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* CMP/HS Rm,Rn */
void cmp_hs__source_and_destination_operands(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* CMP/GE Rm,Rn */
void cmp_ge__source_and_destination_operands(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* CMP/HI Rm,Rn */
void cmp_hi__source_and_destination_operands(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* CMP/GT Rm,Rn */
void cmp_gt__source_and_destination_operands(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* CMP/PZ Rn */
void cmp_pz__destination_operand_only(struct architectural_state * state, struct memory_map * map, const uint32_t n);
/* CMP/PL Rn */
void cmp_pl__destination_operand_only(struct architectural_state * state, struct memory_map * map, const uint32_t n);
/* CMP/STR Rm,Rn */
void cmp_str__source_and_destination_operands(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* DIV1 Rm,Rn */
void div1__source_and_destination_operands(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* DIV0S Rm,Rn */
void div0s__source_and_destination_operands(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* DIV0U */
void div0u__no_operand(struct architectural_state * state, struct memory_map * map);
/* DMULS.L Rm,Rn */
void dmuls_l__source_and_destination_operands(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* DMULU.L Rm,Rn */
void dmulu_l__source_and_destination_operands(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* DT Rn */
void dt__destination_operand_only(struct architectural_state * state, struct memory_map * map, const uint32_t n);
/* EXTS.B Rm,Rn */
void exts_b__source_and_destination_operands(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* EXTS.W Rm,Rn */
void exts_w__source_and_destination_operands(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* EXTU.B Rm,Rn */
void extu_b__source_and_destination_operands(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* EXTU.W Rm,Rn */
void extu_w__source_and_destination_operands(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* MAC.L @Rm+,@Rn+ */
void mac_l__multiply_and_accumulate_operation(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* MAC.W @Rm+,@Rn+ */
void mac_w__multiply_and_accumulate_operation(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* MUL.L Rm,Rn */
void mul_l__source_and_destination_operands(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* MULS.W Rm,Rn */
void muls_w__source_and_destination_operands(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* MULU.W Rm,Rn */
void mulu_w__source_and_destination_operands(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* NEG Rm,Rn */
void neg__source_and_destination_operands(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* NEGC Rm,Rn */
void negc__source_and_destination_operands(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* SUB Rm,Rn */
void sub__source_and_destination_operands(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* SUBC Rm,Rn */
void subc__source_and_destination_operands(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* SUBV Rm,Rn */
void subv__source_and_destination_operands(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* AND Rm,Rn */
void and__source_and_destination_operands(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* AND #imm,R0 */
void and__immediate(struct architectural_state * state, struct memory_map * map, const uint32_t i);
/* AND.B #imm,@(R0,GBR) */
void and_b__store_indexed_gbr_indirect(struct architectural_state * state, struct memory_map * map, const uint32_t i);
/* NOT Rm,Rn */
void not__source_and_destination_operands(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* OR Rm,Rn */
void or__source_and_destination_operands(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* OR #imm,R0 */
void or__immediate(struct architectural_state * state, struct memory_map * map, const uint32_t i);
/* OR.B #imm,@(R0,GBR) */
void or_b__store_indexed_gbr_indirect(struct architectural_state * state, struct memory_map * map, const uint32_t i);
/* TAS.B @Rn */
void tas_b__destination_operand_only(struct architectural_state * state, struct memory_map * map, const uint32_t n);
/* TST Rm,Rn */
void tst__source_and_destination_operands(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* TST #imm,R0 */
void tst__immediate(struct architectural_state * state, struct memory_map * map, const uint32_t i);
/* TST.B #imm,@(R0,GBR) */
void tst_b__store_indexed_gbr_indirect(struct architectural_state * state, struct memory_map * map, const uint32_t i);
/* XOR Rm,Rn */
void xor__source_and_destination_operands(struct architectural_state * state, struct memory_map * map, const uint32_t m, const uint32_t n);
/* XOR #imm,R0 */
void xor__immediate(struct architectural_state * state, struct memory_map * map, const uint32_t i);
/* XOR.B #imm,@(R0,GBR) */
void xor_b__store_indexed_gbr_indirect(struct architectural_state * state, struct memory_map * map, const uint32_t i);
/* ROTL Rn */
void rotl__destination_operand_only(struct architectural_state * state, struct memory_map * map, const uint32_t n);
/* ROTR Rn */
void rotr__destination_operand_only(struct architectural_state * state, struct memory_map * map, const uint32_t n);
/* ROTCL Rn */
void rotcl__destination_operand_only(struct architectural_state * state, struct memory_map * map, const uint32_t n);
/* ROTCR Rn */
void rotcr__destination_operand_only(struct architectural_state * state, struct memory_map * map, const uint32_t n);
/* SHAL Rn */
void shal__destination_operand_only(struct architectural_state * state, struct memory_map * map, const uint32_t n);
/* SHAR Rn */
void shar__destination_operand_only(struct architectural_state * state, struct memory_map * map, const uint32_t n);
/* SHLL Rn */
void shll__destination_operand_only(struct architectural_state * state, struct memory_map * map, const uint32_t n);
/* SHLR Rn */
void shlr__destination_operand_only(struct architectural_state * state, struct memory_map * map, const uint32_t n);
/* SHLL2 Rn */
void shll2__destination_operand_only(struct architectural_state * state, struct memory_map * map, const uint32_t n);
/* SHLR2 Rn */
void shlr2__destination_operand_only(struct architectural_state * state, struct memory_map * map, const uint32_t n);
/* SHLL8 Rn */
void shll8__destination_operand_only(struct architectural_state * state, struct memory_map * map, const uint32_t n);
/* SHLR8 Rn */
void shlr8__destination_operand_only(struct architectural_state * state, struct memory_map * map, const uint32_t n);
/* SHLL16 Rn */
void shll16__destination_operand_only(struct architectural_state * state, struct memory_map * map, const uint32_t n);
/* SHLR16 Rn */
void shlr16__destination_operand_only(struct architectural_state * state, struct memory_map * map, const uint32_t n);
/* BF label */
void bf__pc_relative(struct architectural_state * state, struct memory_map * map, const uint32_t d);
/* BF/S label */
void bf_s__pc_relative(struct architectural_state * state, struct memory_map * map, const uint32_t d);
/* BT label */
void bt__pc_relative(struct architectural_state * state, struct memory_map * map, const uint32_t d);
/* BT/S label */
void bt_s__pc_relative(struct architectural_state * state, struct memory_map * map, const uint32_t d);
/* BRA label */
void bra__pc_relative(struct architectural_state * state, struct memory_map * map, const uint32_t d);
/* BRAF Rn */
void braf__destination_operand_only(struct architectural_state * state, struct memory_map * map, const uint32_t n);
/* BSR label */
void bsr__pc_relative(struct architectural_state * state, struct memory_map * map, const uint32_t d);
/* BSRF Rn */
void bsrf__destination_operand_only(struct architectural_state * state, struct memory_map * map, const uint32_t n);
/* JMP @Rn */
void jmp__destination_operand_only(struct architectural_state * state, struct memory_map * map, const uint32_t n);
/* JSR @Rn */
void jsr__destination_operand_only(struct architectural_state * state, struct memory_map * map, const uint32_t n);
/* RTS */
void rts__no_operand(struct architectural_state * state, struct memory_map * map);
/* CLRMAC */
void clrmac__no_operand(struct architectural_state * state, struct memory_map * map);
/* CLRS */
void clrs__no_operand(struct architectural_state * state, struct memory_map * map);
/* CLRT */
void clrt__no_operand(struct architectural_state * state, struct memory_map * map);
/* LDC Rm,SR */
void ldc__transfer_to_sr(struct architectural_state * state, struct memory_map * map, const uint32_t m);
/* LDC Rm,GBR */
void ldc__transfer_to_gbr(struct architectural_state * state, struct memory_map * map, const uint32_t m);
/* LDC Rm,VBR */
void ldc__transfer_to_vbr(struct architectural_state * state, struct memory_map * map, const uint32_t m);
/* LDC.L @Rm+,SR */
void ldc_l__load_to_sr(struct architectural_state * state, struct memory_map * map, const uint32_t m);
/* LDC.L @Rm+,GBR */
void ldc_l__load_to_gbr(struct architectural_state * state, struct memory_map * map, const uint32_t m);
/* LDC.L @Rm+,VBR */
void ldc_l__load_to_vbr(struct architectural_state * state, struct memory_map * map, const uint32_t m);
/* LDS Rm,MACH */
void lds__transfer_to_mach(struct architectural_state * state, struct memory_map * map, const uint32_t m);
/* LDS Rm,MACL */
void lds__transfer_to_macl(struct architectural_state * state, struct memory_map * map, const uint32_t m);
/* LDS Rm,PR */
void lds__transfer_to_pr(struct architectural_state * state, struct memory_map * map, const uint32_t m);
/* LDS.L @Rm+,MACH */
void lds_l__load_to_mach(struct architectural_state * state, struct memory_map * map, const uint32_t m);
/* LDS.L @Rm+,MACL */
void lds_l__load_to_macl(struct architectural_state * state, struct memory_map * map, const uint32_t m);
/* LDS.L @Rm+,PR */
void lds_l__load_to_pr(struct architectural_state * state, struct memory_map * map, const uint32_t m);
/* NOP */
void nop__no_operand(struct architectural_state * state, struct memory_map * map);
/* RTE */
void rte__no_operand(struct architectural_state * state, struct memory_map * map);
/* SETS */
void sets__no_operand(struct architectural_state * state, struct memory_map * map);
/* SETT */
void sett__no_operand(struct architectural_state * state, struct memory_map * map);
/* SLEEP */
void sleep__no_operand(struct architectural_state * state, struct memory_map * map);
/* STC SR,Rn */
void stc__transfer_from_sr(struct architectural_state * state, struct memory_map * map, const uint32_t n);
/* STC GBR,Rn */
void stc__transfer_from_gbr(struct architectural_state * state, struct memory_map * map, const uint32_t n);
/* STC VBR,Rn */
void stc__transfer_from_vbr(struct architectural_state * state, struct memory_map * map, const uint32_t n);
/* STC.L SR,@-Rn */
void stc_l__store_from_sr(struct architectural_state * state, struct memory_map * map, const uint32_t n);
/* STC.L GBR,@-Rn */
void stc_l__store_from_gbr(struct architectural_state * state, struct memory_map * map, const uint32_t n);
/* STC.L VBR,@-Rn */
void stc_l__store_from_vbr(struct architectural_state * state, struct memory_map * map, const uint32_t n);
/* STS MACH,Rn */
void sts__transfer_from_mach(struct architectural_state * state, struct memory_map * map, const uint32_t n);
/* STS MACL,Rn */
void sts__transfer_from_macl(struct architectural_state * state, struct memory_map * map, const uint32_t n);
/* STS PR,Rn */
void sts__transfer_from_pr(struct architectural_state * state, struct memory_map * map, const uint32_t n);
/* STS.L MACH,@-Rn */
void sts_l__store_from_mach(struct architectural_state * state, struct memory_map * map, const uint32_t n);
/* STS.L MACL,@-Rn */
void sts_l__store_from_macl(struct architectural_state * state, struct memory_map * map, const uint32_t n);
/* STS.L PR,@-Rn */
void sts_l__store_from_pr(struct architectural_state * state, struct memory_map * map, const uint32_t n);
/* TRAPA #imm */
void trapa__immediate(struct architectural_state * state, struct memory_map * map, const uint32_t i);

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#include <assert.h>
#include <stdio.h>
#include "memory_map.h"
#include "ram.h"
#include "state.h"
#include "exception.h"
#include "execute.h"
#include "decode_print.h"
int main(int argc, char *argv[])
{
assert(argc > 1);
FILE * f = fopen(argv[1], "r");
if (f == NULL) {
fprintf(stderr, "fopen %s\n", argv[1]);
return -1;
}
int ret = fseek(f, 0, SEEK_END);
assert(ret == 0);
uint32_t read_size = ftell(f);
ret = fseek(f, 0, SEEK_SET);
assert(ret == 0);
uint32_t rom_size = ((read_size + 3) & ~3);
uint32_t buf[rom_size / 4];
uint32_t ret_size = fread(buf, 1, read_size, f);
assert(ret_size == read_size);
ret = fclose(f);
assert(ret == 0);
struct memory_map map = { .length = 0 };
map.entry[map.length++] = (struct memory_map_entry){
.start = 0x0000'0000,
.size = rom_size,
.mem = (void *)buf,
.access = ram__memory_access,
};
struct architectural_state state = { 0 };
POWERON(&state);
char const * instruction_buf;
char operand_buf[128];
while (1) {
uint32_t instruction_code = fetch(&state, &map);
decode_and_print_instruction(&state, &map, instruction_code, &instruction_buf, operand_buf, 128);
printf("pc %08x %-7s %-20s\n", state.pc[0], instruction_buf, operand_buf);
if (physical_address(state.pc[0]) == 0x38)
break;
step(&state, &map);
}
printf("part1 %d\n", state.gbr);
printf("part2 %d %d\n", state.mach, state.macl);
}

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#pragma once
#include <assert.h>
#include <stdint.h>
// 0x1F000000 - 0x1FFFFFFF
// 0xFF000000 - 0xFFFFFFFF
struct memory_access {
uint8_t (* read_memory8 )(void * mem, uint32_t address);
uint16_t (* read_memory16 )(void * mem, uint32_t address);
uint32_t (* read_memory32 )(void * mem, uint32_t address);
void (* write_memory8 )(void * mem, uint32_t address, uint8_t value);
void (* write_memory16)(void * mem, uint32_t address, uint16_t value);
void (* write_memory32)(void * mem, uint32_t address, uint32_t value);
};
struct memory_map_entry {
uint32_t start;
uint32_t size;
void * mem;
struct memory_access access;
};
#define memory_map_max_length 16
struct memory_map {
uint32_t length;
struct memory_map_entry entry[memory_map_max_length];
};
static inline uint32_t physical_address(uint32_t address)
{
if (address < 0xe0000000)
return address & (~(0b111 << 29)); // P0 P1 P2 P3 region
else
return address; // P4 region
}
static inline struct memory_map_entry * find_entry(struct memory_map * map, uint32_t address)
{
uint32_t physical = physical_address(address);
assert(map->length <= memory_map_max_length);
for (int i = 0; i < map->length; i++) {
uint32_t entry_start = map->entry[i].start;
uint32_t entry_end = map->entry[i].start + map->entry[i].size;
if (physical >= entry_start && physical < entry_end)
return &map->entry[i];
}
return (struct memory_map_entry *)0;
}
#undef memory_map_max_length

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#pragma once
#include <stdint.h>
#include <assert.h>
//
// sign_extend
//
static inline int32_t sign_extend(uint32_t x, uint32_t b)
{
const uint32_t m = 1UL << (b - 1);
x = x & ((1UL << b) - 1);
const int32_t r = (x ^ m) - m;
return r;
}
static inline int64_t sign_extend64(uint64_t x)
{
return (int64_t)x;
}
static inline int32_t sign_extend32(uint32_t x)
{
return (int32_t)x;
}
static inline int32_t sign_extend16(uint32_t x)
{
return sign_extend(x, 16);
}
static inline int32_t sign_extend12(uint32_t x)
{
return sign_extend(x, 12);
}
static inline int32_t sign_extend8(uint32_t x)
{
return sign_extend(x, 8);
}
//
// zero_extend
//
static inline uint32_t zero_extend(uint32_t x, uint32_t b)
{
x = x & ((1ULL << b) - 1);
return x;
}
static inline uint32_t zero_extend32(uint32_t x)
{
return (uint32_t)x;
}
static inline uint32_t zero_extend16(uint32_t x)
{
return zero_extend(x, 16);
}
static inline uint32_t zero_extend8(uint32_t x)
{
return zero_extend(x, 8);
}
static inline uint32_t zero_extend4(uint32_t x)
{
return zero_extend(x, 4);
}
static inline uint32_t zero_extend1(uint32_t x)
{
return zero_extend(x, 1);
}
//
// signed_saturate
//
static inline uint64_t signed_saturate(uint64_t x, uint32_t b)
{
const int64_t upper = (1LL << (b - 1)) - 1;
const int64_t lower = -(1LL << (b - 1));
static_assert(-(1LL << (48 - 1)) < 0);
if (x > upper)
return upper;
else if (x < lower)
return lower;
else
return x;
}
static inline uint64_t signed_saturate48(uint64_t x)
{
return signed_saturate(x, 48);
}
static inline uint32_t signed_saturate32(uint32_t x)
{
return signed_saturate(x, 32);
}
//
// "convenience" functions
//
static inline uint32_t _register(uint32_t x)
{
return zero_extend(x, 32);
}
static inline uint32_t bit(uint32_t x)
{
return zero_extend(x, 1);
}
//
// "operations"
//
static inline int32_t unary_int(int64_t x)
{
return x != 0;
}
static inline int64_t bit_extract(int64_t n, int64_t b, int64_t m)
{
return (n >> b) & ((1 << m) - 1);
}

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#include "ram.h"
#define TARGET_ENDIAN __ORDER_LITTLE_ENDIAN__
uint8_t ram__read_memory8(void * data, uint32_t address)
{
uint8_t * mem = (uint8_t *)data;
return mem[address];
}
uint16_t ram__read_memory16(void * data, uint32_t address)
{
uint16_t * mem = (uint16_t *)data;
uint16_t value = mem[address >> 1];
#if __BYTE_ORDER__ == TARGET_ENDIAN
return value;
#else
return __builtin_bswap16(value);
#endif
}
uint32_t ram__read_memory32(void * data, uint32_t address)
{
uint32_t * mem = (uint32_t *)data;
uint32_t value = mem[address >> 2];
#if __BYTE_ORDER__ == TARGET_ENDIAN
return value;
#else
return __builtin_bswap32(value);
#endif
}
void ram__write_memory8(void * data, uint32_t address, uint8_t value)
{
uint8_t * mem = (uint8_t *)data;
mem[address] = value;
}
void ram__write_memory16(void * data, uint32_t address, uint16_t value)
{
uint16_t * mem = (uint16_t *)data;
#if __BYTE_ORDER__ != TARGET_ENDIAN
value = __builtin_bswap16(value);
#endif
mem[address >> 1] = value;
}
void ram__write_memory32(void * data, uint32_t address, uint32_t value)
{
uint32_t * mem = (uint32_t *)data;
#if __BYTE_ORDER__ != TARGET_ENDIAN
value = __builtin_bswap32(value);
#endif
mem[address >> 2] = value;
}
struct memory_access ram__memory_access = {
.read_memory8 = &ram__read_memory8,
.read_memory16 = &ram__read_memory16,
.read_memory32 = &ram__read_memory32,
.write_memory8 = &ram__write_memory8,
.write_memory16 = &ram__write_memory16,
.write_memory32 = &ram__write_memory32
};

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#pragma once
#include <stdint.h>
#include "memory_map.h"
uint8_t ram__read_memory8(void * data, uint32_t address);
uint16_t ram__read_memory16(void * data, uint32_t address);
uint32_t ram__read_memory32(void * data, uint32_t address);
void ram__write_memory8(void * data, uint32_t address, uint8_t value);
void ram__write_memory16(void * data, uint32_t address, uint16_t value);
void ram__write_memory32(void * data, uint32_t address, uint32_t value);
extern struct memory_access ram__memory_access;

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#pragma once
#include <stdint.h>
struct sr_bits {
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
uint32_t t : 1;
uint32_t s : 1;
uint32_t _res0 : 2;
uint32_t imask : 4;
uint32_t _res1 : 3;
uint32_t q : 1;
uint32_t m : 1;
uint32_t _res2 : 5;
uint32_t fd : 1;
uint32_t _res3 : 12;
uint32_t bl : 1;
uint32_t rb : 1;
uint32_t md : 1;
uint32_t _res4 : 1;
#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
uint32_t _res4 : 1;
uint32_t md : 1;
uint32_t rb : 1;
uint32_t bl : 1;
uint32_t _res3 : 12;
uint32_t fd : 1;
uint32_t _res2 : 5;
uint32_t m : 1;
uint32_t q : 1;
uint32_t _res1 : 3;
uint32_t imask : 4;
uint32_t _res0 : 2;
uint32_t s : 1;
uint32_t t : 1;
#else
# error "unsupported endianness"
#endif
};

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#pragma once
#include <assert.h>
#include <stdint.h>
#include <stdbool.h>
#include "sr_bits.h"
#define SR__RB (1 << 29)
#define SR__MD (1 << 30)
#define BANK(sr) (((sr) & SR__RB) && ((sr) & SR__MD))
#define REGN(sr, x) (((x) & (1 << 3)) ? (x) : ((x) ^ (BANK(sr) << 4)))
#define REG(state, x) ((state)->general_register[REGN((state)->sr.value, (x))])
#define REGN_BANK(sr, x) (((x) & (1 << 3)) ? (x) : ((x) ^ ((!BANK(sr)) << 4)))
#define REG_BANK(state, x) ((state)->general_register[REGN_BANK((state)->sr.value, (x))])
static_assert(REGN(0, 0 ) == 0 );
static_assert(REGN(0, 7 ) == 7 );
static_assert(REGN(0, 8 ) == 8 );
static_assert(REGN(0, 15) == 15);
static_assert(REGN(SR__MD | SR__RB, 0 ) == 16);
static_assert(REGN(SR__MD | SR__RB, 7 ) == 23);
static_assert(REGN(SR__MD | SR__RB, 8 ) == 8 );
static_assert(REGN(SR__MD | SR__RB, 15) == 15);
static_assert(REGN_BANK(0, 0 ) == 16);
static_assert(REGN_BANK(0, 7 ) == 23);
static_assert(REGN_BANK(0, 8 ) == 8 );
static_assert(REGN_BANK(0, 15) == 15);
static_assert(REGN_BANK(SR__MD | SR__RB, 0 ) == 0 );
static_assert(REGN_BANK(SR__MD | SR__RB, 7 ) == 7 );
static_assert(REGN_BANK(SR__MD | SR__RB, 8 ) == 8 );
static_assert(REGN_BANK(SR__MD | SR__RB, 15) == 15);
struct architectural_state {
uint32_t general_register[24];
// system_register
uint32_t mach;
uint32_t macl;
uint32_t pr[3];
uint32_t pc[3];
uint32_t fpscr;
uint32_t fpul;
//
// control_register
union {
struct sr_bits bits;
uint32_t value;
} sr;
uint32_t ssr;
uint32_t spc;
uint32_t gbr;
uint32_t vbr;
uint32_t sgr;
uint32_t dbr;
//
uint32_t floating_point_register[32];
bool is_delay_slot;
};
//

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#pragma once
#include <stddef.h>
#include <assert.h>
#include "state.h"
#include "memory_map.h"
static inline bool is_delay_slot(struct architectural_state * state)
{
return state->is_delay_slot;
}
static inline void sleep(struct architectural_state * state)
{
}
static inline void ocbp(struct architectural_state * state, uint32_t address)
{
}
static inline uint8_t read_memory8(struct memory_map * map, uint32_t address)
{
struct memory_map_entry * entry = find_entry(map, address);
if (entry == NULL) return 0;
uint32_t relative_address = physical_address(address) - entry->start;
return entry->access.read_memory8(entry->mem, relative_address);
}
static inline uint16_t read_memory16(struct memory_map * map, uint32_t address)
{
assert((address & 0b1) == 0);
struct memory_map_entry * entry = find_entry(map, address);
if (entry == NULL) return 0;
uint32_t relative_address = physical_address(address) - entry->start;
return entry->access.read_memory16(entry->mem, relative_address);
}
static inline uint32_t read_memory32(struct memory_map * map, uint32_t address)
{
assert((address & 0b11) == 0);
struct memory_map_entry * entry = find_entry(map, address);
if (entry == NULL) return 0;
uint32_t relative_address = physical_address(address) - entry->start;
return entry->access.read_memory32(entry->mem, relative_address);
}
static inline void write_memory8(struct memory_map * map, uint32_t address, uint8_t value)
{
struct memory_map_entry * entry = find_entry(map, address);
if (entry == NULL) return;
uint32_t relative_address = physical_address(address) - entry->start;
entry->access.write_memory8(entry->mem, relative_address, value);
}
static inline void write_memory16(struct memory_map * map, uint32_t address, uint16_t value)
{
assert((address & 0b1) == 0);
struct memory_map_entry * entry = find_entry(map, address);
if (entry == NULL) return;
uint32_t relative_address = physical_address(address) - entry->start;
entry->access.write_memory16(entry->mem, relative_address, value);
}
static inline void write_memory32(struct memory_map * map, uint32_t address, uint32_t value)
{
assert((address & 0b11) == 0);
struct memory_map_entry * entry = find_entry(map, address);
if (entry == NULL) return;
uint32_t relative_address = physical_address(address) - entry->start;
entry->access.write_memory32(entry->mem, relative_address, value);
}

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POWERON 1 1 0xA0000000 - 0x000
MANRESET 1 2 0xA0000000 - 0x020
HUDIRESET 1 1 0xA0000000 - 0x000
ITLBMULTIHIT 1 3 0xA0000000 - 0x140
OTLBMULTIHIT 1 4 0xA0000000 - 0x140
UBRKBEFORE 2 0 (VBR/DBR) 0x100/- 0x1E0
IADDERR 2 1 (VBR) 0x100 0x0E0
ITLBMISS 2 2 (VBR) 0x400 0x040
EXECPROT 2 3 (VBR) 0x100 0x0A0
RESINST 2 4 (VBR) 0x100 0x180
ILLSLOT 2 4 (VBR) 0x100 0x1A0
FPUDIS 2 4 (VBR) 0x100 0x800
SLOTFPUDIS 2 4 (lVBR) 0x100 0x820
RADDERR 2 5 (VBR) 0x100 0x0E0
WADDERR 2 5 (VBR) 0x100 0x100
RTLBMISS 2 6 (VBR) 0x400 0x040
WTLBMISS 2 6 (VBR) 0x400 0x060
READPROT 2 7 (VBR) 0x100 0x0A0
WRITEPROT 2 7 (VBR) 0x100 0x0C0
FPUEXC 2 8 (VBR) 0x100 0x120
FIRSTWRITE 2 9 (VBR) 0x100 0x080
TRAP 2 4 (VBR) 0x100 0x160
UBRKAFTER 2 10 (VBR/DBR) 0x100/- 0x1E0

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import io
def should_autonewline(line):
return (
"static_assert" not in line
and "extern" not in line
and (len(line.split()) < 2 or line.split()[1] != '=') # hacky; meh
)
def _render(out, lines):
indent = " "
level = 0
for l in lines:
if l and (l[0] == "}" or l[0] == ")"):
level -= 2
assert level >= 0, out.getvalue()
if len(l) == 0:
out.write("\n")
else:
out.write(indent * level + l + "\n")
if l and (l[-1] == "{" or l[-1] == "("):
level += 2
if level == 0 and l and l[-1] == ";":
if should_autonewline(l):
out.write("\n")
return out
def renderer():
out = io.StringIO()
def render(lines):
return _render(out, lines)
return render, out

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import sys
from collections import defaultdict
from instruction_table import untabulate_instructions_sh4
from instruction_table import untabulate_instructions_sh2
from instruction_function_name import instruction_function_name
from generate import renderer
def b16(n):
bits = []
for i in range(16):
bits.append((n >> i) & 1)
return '0b' + ''.join(map(str, reversed(bits)))
def format_variables(ins):
s = ins.operands
for i, name in enumerate(ins.variables):
if 'disp' in s and name == 'd':
name = 'disp'
if 'imm' in s and name == 'i':
name = 'imm'
if 'label' in s and name == 'd':
name = 'label'
s = s.replace(name, "%d")
return s
def render_print(ins):
variable_args = ", " + ", ".join(ins.variables) if ins.variables else ""
operands = format_variables(ins)
if operands:
yield f'snprintf(operand_buf, size, "{operands}"{variable_args});'
else:
yield "operand_buf[0] = 0;";
yield f'*instruction_buf = "{ins.instruction}";'
def render_execute(ins):
function_name = instruction_function_name(ins)
variable_args = ", " + ", ".join(ins.variables) if ins.variables else ""
yield f"{function_name}(state, map{variable_args});"
def render_mask_switch(body_func, mask, instructions):
yield f"switch (code & {b16(mask)}) {{"
for ins in instructions:
yield f"case {b16(ins.code.code_bits)}: // {ins.instruction} {ins.operands}"
yield "{"
for variable in ins.variables:
operand_var = ins.code.operands[variable]
yield f"uint32_t {variable} = (code >> {operand_var.lsb}) & ((1 << {operand_var.length}) - 1);"
yield from body_func(ins)
yield f"return DECODE__DEFINED;"
yield "}"
yield "}"
def render_mask_switches(body_func, by_mask):
yield "{"
for mask, instructions in by_mask.items():
instructions = sorted(instructions, key=lambda i: i.code.code_bits)
yield from render_mask_switch(body_func, mask, instructions)
yield "return DECODE__UNDEFINED;"
yield "}"
def render_decode_and_execute(by_mask):
yield f"enum decode_status decode_and_execute_instruction(struct architectural_state * state, struct memory_map * map, uint16_t code)"
yield from render_mask_switches(render_execute, by_mask)
def render_decode_and_print(by_mask):
yield f"enum decode_status decode_and_print_instruction(struct architectural_state * state, struct memory_map * map, uint16_t code, char const ** instruction_buf, char * operand_buf, uint32_t size)"
yield from render_mask_switches(render_print, by_mask)
def header_execute():
yield '#include "decode_execute.h"'
yield '#include "impl.h"'
yield ""
def header_print():
yield '#include <stdio.h>'
yield ""
yield '#include "decode_print.h"'
yield ""
def main():
by_mask = defaultdict(list)
masks = []
sh2_instructions = set((ins.instruction, ins.operands) for ins in untabulate_instructions_sh2())
for ins in untabulate_instructions_sh4():
if (ins.instruction, ins.operands) not in sh2_instructions:
continue
if ins.code.mask_bits not in masks:
masks.append(ins.code.mask_bits)
by_mask[ins.code.mask_bits].append(ins)
render, out = renderer()
render(header_execute())
render(render_decode_and_execute(by_mask))
with open(sys.argv[1], 'w') as f:
f.write(out.getvalue())
render, out = renderer()
render(header_print())
render(render_decode_and_print(by_mask))
with open(sys.argv[2], 'w') as f:
f.write(out.getvalue())
if __name__ == "__main__":
main()

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from dataclasses import dataclass
from parser import Tree
from lexer import Identifier, Punctuator, IntegerConstant
import identifier_substitution
@dataclass
class CTX:
identifiers: set
def argument_list(ctx, tree):
yield from generate(ctx, tree.children[0])
yield ", "
yield from generate(ctx, tree.children[1])
def _is_new_temporary(ctx, tree):
return (
type(tree) is Identifier
and tree.token not in identifier_substitution.mapping
and tree.token not in ctx.identifiers
)
def assignment(ctx, tree):
lhs = tree.children[0]
rhs = tree.children[1]
if _is_new_temporary(ctx, lhs):
ctx.identifiers.add(lhs.token)
yield "int64_t "
yield from generate(ctx, tree.children[0])
yield " = "
yield from generate(ctx, tree.children[1])
def bit_extraction(ctx, tree):
yield "bit_extract("
yield from generate(ctx, tree.children[0])
yield ", "
yield from generate(ctx, tree.children[1])
yield ")"
def bitwise_and(ctx, tree):
yield from generate(ctx, tree.children[0])
yield " & "
yield from generate(ctx, tree.children[1])
def bitwise_or(ctx, tree):
yield from generate(ctx, tree.children[0])
yield " | "
yield from generate(ctx, tree.children[1])
def bitwise_xor(ctx, tree):
yield from generate(ctx, tree.children[0])
yield " ^ "
yield from generate(ctx, tree.children[1])
def block_item_list(ctx, tree):
yield from generate(ctx, tree.children[0])
yield from generate(ctx, tree.children[1])
def compound_statement(ctx, tree):
yield "\n{\n"
if tree.children:
yield from generate(ctx, tree.children[0])
yield "}\n"
def expression_statement(ctx, tree):
yield from generate(ctx, tree.children[0])
yield ";\n"
def for_expression(ctx, tree):
yield from generate(ctx, tree.children[0])
yield ", "
if len(tree.children) > 1:
yield from generate(ctx, tree.children[1])
else:
yield "1"
def helper_arguments(tree):
if type(tree.children[0]) is not Identifier:
return
name = tree.children[0].token
mapping = {
"IsDelaySlot": "state",
"SLEEP": "state",
"OCBP" : "state",
"WriteMemory8" : "map",
"WriteMemory16": "map",
"WriteMemory32": "map",
"ReadMemory8" : "map",
"ReadMemory16" : "map",
"ReadMemory32" : "map",
}
return mapping.get(name, None)
def function_call(ctx, tree):
yield from generate(ctx, tree.children[0])
yield "("
if len(tree.children) >= 2:
if helper_arguments(tree):
yield helper_arguments(tree)
yield ", "
yield from generate(ctx, tree.children[1])
else:
if helper_arguments(tree):
yield helper_arguments(tree)
yield ")"
def grouping(ctx, tree):
yield "("
yield from generate(ctx, tree.children[0])
yield ")"
def _if(ctx, tree):
yield "if ("
yield from generate(ctx, tree.children[0])
yield ") "
yield from generate(ctx, tree.children[1])
def if_else(ctx, tree):
yield "if ("
yield from generate(ctx, tree.children[0])
yield ") "
yield from generate(ctx, tree.children[1])
yield "else "
yield from generate(ctx, tree.children[2])
def logical_and(ctx, tree):
yield from generate(ctx, tree.children[0])
yield " && "
yield from generate(ctx, tree.children[1])
def logical_or(ctx, tree):
yield from generate(ctx, tree.children[0])
yield " || "
yield from generate(ctx, tree.children[1])
def member(ctx, tree):
yield from generate(ctx, tree.children[0])
yield "."
yield from generate(ctx, tree.children[1])
def subscript(ctx, tree):
yield from generate(ctx, tree.children[0])
yield "["
yield from generate(ctx, tree.children[1])
yield "]"
def throw(ctx, tree):
yield "return "
yield from generate(ctx, tree.children[0])
yield "(state);\n"
def throw_arg(ctx, tree):
yield "return "
yield from generate(ctx, tree.children[0])
yield "(state, "
yield from generate(ctx, tree.children[1])
yield ");\n"
def unary_complement(ctx, tree):
yield from "~"
yield from generate(ctx, tree.children[0])
def unary_int(ctx, tree):
yield "unary_int("
yield from generate(ctx, tree.children[0])
yield ")"
def unary_negation(ctx, tree):
yield "-"
yield from generate(ctx, tree.children[0])
def unary_not(ctx, tree):
yield "!"
yield from generate(ctx, tree.children[0])
#
def addition(ctx, tree):
yield from generate(ctx, tree.children[0])
yield " + "
yield from generate(ctx, tree.children[1])
def division(ctx, tree):
yield from generate(ctx, tree.children[0])
yield " / "
yield from generate(ctx, tree.children[1])
def equality_equal(ctx, tree):
yield from generate(ctx, tree.children[0])
yield " == "
yield from generate(ctx, tree.children[1])
def equality_not_equal(ctx, tree):
yield from generate(ctx, tree.children[0])
yield " != "
yield from generate(ctx, tree.children[1])
def greater_than(ctx, tree):
yield from generate(ctx, tree.children[0])
yield " > "
yield from generate(ctx, tree.children[1])
def greater_than_equal(ctx, tree):
yield from generate(ctx, tree.children[0])
yield " >= "
yield from generate(ctx, tree.children[1])
def left_shift(ctx, tree):
yield from generate(ctx, tree.children[0])
# hack for left shift by LHS constant
if type(tree.children[0]) is IntegerConstant:
yield "LL"
yield " << "
yield from generate(ctx, tree.children[1])
def less_than(ctx, tree):
yield from generate(ctx, tree.children[0])
yield " < "
yield from generate(ctx, tree.children[1])
def less_than_equal(ctx, tree):
yield from generate(ctx, tree.children[0])
yield " <= "
yield from generate(ctx, tree.children[1])
def multiplication(ctx, tree):
yield from generate(ctx, tree.children[0])
yield " * "
yield from generate(ctx, tree.children[1])
def right_shift(ctx, tree):
yield from generate(ctx, tree.children[0])
yield " >> "
yield from generate(ctx, tree.children[1])
def subtraction(ctx, tree):
yield from generate(ctx, tree.children[0])
yield " - "
yield from generate(ctx, tree.children[1])
def identifier(ctx, token):
if token.token in identifier_substitution.mapping:
yield identifier_substitution.mapping[token.token]
else:
assert token.token.lower() == token.token, token
if token.token not in {'m', 'n', 'i', 'd'}:
assert token.token in ctx.identifiers, (token, ctx.identifiers)
yield token.token
def constant(ctx, elem):
yield elem.token.lower()
def generate(ctx, elem):
mapping = {
"argument_list": argument_list,
"assignment": assignment,
"bit_extraction": bit_extraction,
"bitwise_and": bitwise_and,
"bitwise_or": bitwise_or,
"bitwise_xor": bitwise_xor,
"block_item_list": block_item_list,
"compound_statement": compound_statement,
"expression_statement": expression_statement,
"for_expression": for_expression,
"function_call": function_call,
"grouping": grouping,
"if": _if,
"if_else": if_else,
"logical_and": logical_and,
"logical_or": logical_or,
"member": member,
"subscript": subscript,
"throw": throw,
"throw_arg": throw_arg,
"unary_complement": unary_complement,
"unary_int": unary_int,
"unary_negation": unary_negation,
"unary_not": unary_not,
#
"addition": addition,
"division": division,
"equality_equal": equality_equal,
"equality_not_equal": equality_not_equal,
"greater_than": greater_than,
"greater_than_equal": greater_than_equal,
"left_shift": left_shift,
"less_than": less_than,
"less_than_equal": less_than_equal,
"multiplication": multiplication,
"right_shift": right_shift,
"subtraction": subtraction,
#
}
if type(elem) is Tree:
yield from mapping[elem.operation](ctx, elem)
elif type(elem) is Identifier:
yield from identifier(ctx, elem)
elif type(elem) is IntegerConstant:
yield from constant(ctx, elem)
else:
assert False, type(elem)

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mapping = {
"ReadMemory8" : "read_memory8",
"ReadMemory16" : "read_memory16",
"ReadMemory32" : "read_memory32",
"WriteMemory8" : "write_memory8",
"WriteMemory16" : "write_memory16",
"WriteMemory32" : "write_memory32",
"ZeroExtend1" : "zero_extend1",
"ZeroExtend4" : "zero_extend4",
"ZeroExtend5" : "zero_extend5",
"ZeroExtend8" : "zero_extend8",
"ZeroExtend16" : "zero_extend16",
"ZeroExtend32" : "zero_extend32",
"SignedSaturate32": "signed_saturate32",
"SignedSaturate48": "signed_saturate48",
"SignExtend8" : "sign_extend8",
"SignExtend12" : "sign_extend12",
"SignExtend16" : "sign_extend16",
"SignExtend32" : "sign_extend32",
"Register" : "_register",
"Bit" : "bit",
"MACH" : "state->mach",
"MACL" : "state->macl",
"PR" : "state->pr[0]",
"PR’" : "state->pr[1]",
"PR’’" : "state->pr[2]",
"PC" : "state->pc[0]",
"PC’" : "state->pc[1]",
"PC’’" : "state->pc[2]",
"FPSCR" : "state->fpscr",
"FPUL" : "state->fpul",
"SR" : "state->sr.value",
"SSR" : "state->ssr",
"SPC" : "state->spc",
"GBR" : "state->gbr",
"VBR" : "state->vbr",
"SGR" : "state->sgr",
"DBR" : "state->dbr",
"R0" : "REG(state, 0)",
"Rm" : "REG(state, m)",
"Rm_BANK" : "REG_BANK(state, m)",
"Rn" : "REG(state, n)",
"Rn_BANK" : "REG_BANK(state, n)",
"T" : "state->sr.bits.t",
"S" : "state->sr.bits.s",
"Q" : "state->sr.bits.q",
"M" : "state->sr.bits.m",
"MD" : "state->sr.bits.md",
"NOP" : "",
"BREAK" : "BREAK",
"FIRSTWRITE" : "FIRSTWRITE",
"FPUDIS" : "FPUDIS",
"FPUEXC" : "FPUEXC",
"ILLSLOT" : "ILLSLOT",
"RADDERR" : "RADDERR",
"READPROT" : "READPROT",
"RESINST" : "RESINST",
"RTLBMISS" : "RTLBMISS",
"SLOTFPUDIS" : "SLOTFPUDIS",
"TRAP" : "TRAP",
"WADDERR" : "WADDERR",
"WRITEPROT" : "WRITEPROT",
"WTLBMISS" : "WTLBMISS",
"IsDelaySlot" : "is_delay_slot",
"SLEEP" : "sleep",
"OCBP" : "ocbp",
}
"""
ASID
VPN
PPN
SZ
SZ0
SZ1
SH
PR
WT
C
D
V
AddressUnavailable
ALLOCO
DataAccessMiss
DirtyBit
FpuIsDisabled
IsDelaySlot
MMU
MMUCR
OCBI
OCBWB
PREF
PTEH
PTEL
ReadProhibited
URC
UTLB
WriteProhibited
"""

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from dataclasses import dataclass
"""
token:
keyword
identifier
constant
punctuator
"""
def is_nondigit(c):
return c in {
"_",
"a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m",
"n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z",
"A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M",
"N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z",
"’",
}
def is_digit(c):
return c in {
"0", "1", "2", "3", "4", "5", "6", "7", "8", "9",
}
def is_hexadecimal_digit(c):
return c in {
"0", "1", "2", "3", "4", "5", "6", "7", "8", "9",
"a", "b", "c", "d", "e", "f",
"A", "B", "C", "D", "E", "F",
}
def is_punctuator(c):
return c in {
"[", "]", "(", ")", "{", "}", ".",
"+", "-", "~", "!",
"<<", ">>",
"<", ">",
"≤", "≥",
"≠", "=",
"∨", "∧", "⊕",
"×", "/",
"|", ";", ",",
"←",
}
@dataclass
class Identifier:
line: int
token: str
@dataclass
class IntegerConstant:
line: int
token: str
value: int
@dataclass
class Punctuator:
line: int
token: str
class Lexer:
def __init__(self, buf):
self.buf = buf
self.start = 0
self.end = 0
self.line = 0
def peek(self):
return self.buf[self.end]
def match(self, c):
if self.buf[self.end] == c:
self.end += 1
return True
else:
return False
def slice(self, offset=0):
return self.buf[self.start:self.end+offset]
def advance(self):
c = self.buf[self.end]
self.end += 1
return c
def advance_whitespace(self):
if self.match('\n'):
self.line += 1
return True
elif self.match('\n'):
return True
elif self.match('\t'):
return True
elif self.match(' '):
return True
return False
def identifier(self):
while True:
c = self.peek()
if is_digit(c) or is_nondigit(c):
self.advance()
else:
return Identifier(self.line, self.slice())
def hexadecimal_constant(self):
n = 0
while True:
c = self.peek()
if is_hexadecimal_digit(c):
self.advance()
n *= 16
i = ord(c)
if i >= ord('0') and i <= ord('9'):
n += i - ord('0')
elif i >= ord('a') and i <= ord('f'):
n += 10 + (i - ord('a'))
elif i >= ord('A') and i <= ord('F'):
n += 10 + (i - ord('A'))
else:
assert False
else:
return IntegerConstant(self.line, self.slice(), n)
def decimal_constant(self):
n = 0
while True:
c = self.peek()
if is_digit(c):
self.advance()
n *= 10
i = ord(c)
if i >= ord('0') and i <= ord('9'):
n += i - ord('0')
else:
assert False
else:
return IntegerConstant(self.line, self.slice(), n)
def punctuator(self):
while True:
if self.end < len(self.buf) and is_punctuator(self.slice(1)):
self.advance()
else:
assert is_punctuator(self.slice())
return Punctuator(self.line, self.slice())
def integer_constant(self):
if self.buf[self.start] == '0' and (self.match('x') or self.match('X')):
return self.hexadecimal_constant()
else:
self.end -= 1
return self.decimal_constant()
def next_token(self):
while self.advance_whitespace():
pass
self.start = self.end
c = self.advance()
if is_nondigit(c):
return self.identifier()
elif is_digit(c):
return self.integer_constant()
elif is_punctuator(c):
return self.punctuator()
else:
raise ValueError(c)

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from dataclasses import dataclass
from lexer import Identifier, Punctuator, IntegerConstant
@dataclass
class Tree:
operation: str
children: list
class Parser:
def __init__(self, tokens):
self.pos = 0
self.tokens = tokens
def advance(self, offset=1):
token = self.tokens[self.pos]
self.pos += offset
return token
def check(self, t, offset=0):
if self.pos + offset < len(self.tokens):
token = self.tokens[self.pos + offset]
return type(token) is t
else:
return False
def check_punctuator(self, p, offset=0):
if self.pos + offset < len(self.tokens):
token = self.tokens[self.pos + offset]
return type(token) is Punctuator and token.token == p
else:
return False
def check_identifier(self, p, offset=0):
if self.pos + offset < len(self.tokens):
token = self.tokens[self.pos + offset]
return type(token) is Identifier and token.token == p
else:
return False
def match(self, t):
ret = self.check(t)
if ret:
self.advance()
return ret
def match_punctuator(self, p):
ret = self.check_punctuator(p)
if ret:
self.advance()
return ret
def match_identifier(self, p):
ret = self.check_identifier(p)
if ret:
self.advance()
return ret
def previous(self):
return self.tokens[self.pos - 1]
def primary_expression(self):
aa = ' '.join(t.token for t in self.tokens[self.pos:])
if self.match(Identifier):
return self.previous()
elif self.match(IntegerConstant):
return self.previous()
elif self.match_punctuator("("):
expr = self.expression()
assert self.match_punctuator(")"), self.advance()
return Tree(
operation="grouping",
children=[expr]
)
else:
assert False, self.advance()
def argument_expression_list(self):
expr = self.assignment_expression()
while True:
if self.match_punctuator(","):
right = self.assignment_expression()
expr = Tree(
operation="argument_list",
children=[expr, right]
)
else:
break
return expr
def for_expression(self):
left = self.primary_expression()
assert self.match_identifier("FOR"), self.advance()
right = self.primary_expression()
return Tree(
operation="for_expression",
children=[left, right]
)
def postfix_expression(self):
expr = self.primary_expression()
while True:
if self.match_punctuator("["):
right = self.expression()
assert self.match_punctuator("]"), self.advance()
expr = Tree(
operation="subscript",
children=[expr, right]
)
elif self.match_punctuator("("):
if self.match_punctuator(")"):
right = []
else:
right = [self.argument_expression_list()]
assert self.match_punctuator(")"), self.advance()
expr = Tree(
operation="function_call",
children=[expr, *right]
)
elif self.match_punctuator("<"):
backtrack = self.pos - 1
try:
right = self.for_expression()
except AssertionError:
self.pos = backtrack
break
assert self.match_punctuator(">"), self.advance()
expr = Tree(
operation="bit_extraction",
children=[expr, right]
)
elif self.match_punctuator("."):
assert self.match(Identifier), self.advance()
right = self.previous()
expr = Tree(
operation="member",
children=[expr, right]
)
else:
break
return expr
def unary_expression(self):
if self.match_identifier("NOT"):
return Tree(
operation="unary_not",
children = [
self.unary_expression()
]
)
elif self.match_identifier("INT"):
return Tree(
operation="unary_int",
children = [
self.unary_expression()
]
)
elif self.match_punctuator("~"):
return Tree(
operation="unary_complement",
children = [
self.unary_expression()
]
)
elif self.match_punctuator("-"):
return Tree(
operation="unary_negation",
children = [
self.unary_expression()
]
)
# elif self.match_punctuator("|"):
# expr = self.unary_expression()
# assert self.match_punctuator("|"), self.advance()
# return Tree(
# operation="unary_absolute_value",
# children = [
# expr
# ]
# )
else:
return self.postfix_expression()
def multiplicative_expression(self):
expr = self.unary_expression()
while self.match_punctuator("×") or self.match_punctuator("/"):
operation = {
"×": "multiplication",
"/": "division",
}[self.previous().token]
expr = Tree(
operation=operation,
children=[
expr,
self.unary_expression()
]
)
return expr
def additive_expression(self):
expr = self.multiplicative_expression()
while self.match_punctuator("+") or self.match_punctuator("-"):
operation = {
"+": "addition",
"-": "subtraction",
}[self.previous().token]
expr = Tree(
operation=operation,
children=[
expr,
self.multiplicative_expression()
]
)
return expr
def shift_expression(self):
expr = self.additive_expression()
while self.match_punctuator("<<") or self.match_punctuator(">>"):
operation = {
"<<": "left_shift",
">>": "right_shift",
}[self.previous().token]
expr = Tree(
operation=operation,
children=[
expr,
self.additive_expression()
]
)
return expr
def relational_expression(self):
expr = self.shift_expression()
while self.match_punctuator("<") or self.match_punctuator(">") \
or self.match_punctuator("≤") or self.match_punctuator("≥"):
operation = {
"<": "less_than",
">": "greater_than",
"≤": "less_than_equal",
"≥": "greater_than_equal",
}[self.previous().token]
expr = Tree(
operation=operation,
children=[
expr,
self.shift_expression()
]
)
return expr
def equality_expression(self):
expr = self.relational_expression()
while self.match_punctuator("=") or self.match_punctuator("≠"):
operation = {
"≠": "equality_not_equal",
"=": "equality_equal",
}[self.previous().token]
expr = Tree(
operation=operation,
children=[
expr,
self.relational_expression()
]
)
return expr
def bitwise_and_expression(self):
expr = self.equality_expression()
while self.match_punctuator("∧"):
expr = Tree(
operation="bitwise_and",
children=[
expr,
self.equality_expression()
]
)
return expr
def bitwise_xor_expression(self):
expr = self.bitwise_and_expression()
while self.match_punctuator("⊕"):
expr = Tree(
operation="bitwise_xor",
children=[
expr,
self.bitwise_and_expression()
]
)
return expr
def bitwise_or_expression(self):
expr = self.bitwise_xor_expression()
while self.match_punctuator("∨"):
expr = Tree(
operation="bitwise_or",
children=[
expr,
self.bitwise_xor_expression()
]
)
return expr
def logical_and_expression(self):
expr = self.bitwise_or_expression()
while self.match_identifier('AND'):
expr = Tree(
operation="logical_and",
children=[
expr,
self.bitwise_or_expression()
]
)
return expr
def logical_xor_expression(self):
# expr = self.logical_and_expression()
# while self.match_identifier('XOR'):
# expr = Tree(
# operation="logical_xor",
# children=[
# expr,
# self.logical_and_expression()
# ]
# )
# return expr
return self.logical_and_expression()
def logical_or_expression(self):
expr = self.logical_xor_expression()
while self.match_identifier('OR'):
expr = Tree(
operation="logical_or",
children=[
expr,
self.logical_xor_expression()
]
)
return expr
def assignment_expression(self):
backtrack = self.pos
try:
left = self.unary_expression()
except AssertionError:
self.pos = backtrack
return self.logical_or_expression()
if self.match_punctuator("←"):
right = self.assignment_expression()
return Tree(
operation="assignment",
children=[left, right],
)
else:
self.pos = backtrack
return self.logical_or_expression()
def expression(self):
return self.assignment_expression()
def statement(self):
return self.unlabeled_statement()
def unlabeled_statement(self):
backtrack = self.pos
try:
return self.expression_statement()
except AssertionError:
self.pos = backtrack
return self.primary_block()
def expression_statement(self):
expr = self.expression()
assert self.match_punctuator(";"), self.advance()
return Tree(
operation="expression_statement",
children=[expr]
)
def primary_block(self):
if self.check_punctuator("{"):
return self.compound_statement()
elif self.check_identifier("IF"):
return self.selection_statement()
elif self.check_identifier("THROW"):
return self.throw_statement()
else:
assert False, self.advance()
def secondary_block(self):
return self.statement()
def compound_statement(self):
assert self.match_punctuator("{"), self.advance()
if self.match_punctuator("}"):
return Tree(
operation="compound_statement",
children=[],
)
else:
expr = self.block_item_list()
assert self.match_punctuator("}"), self.advance()
return Tree(
operation="compound_statement",
children=[expr]
)
def block_item_list(self):
expr = self.block_item()
while True:
backtrack = self.pos
try:
right = self.block_item()
expr = Tree(
operation="block_item_list",
children=[expr, right]
)
except AssertionError:
self.pos = backtrack
break
return expr
def block_item(self):
return self.unlabeled_statement()
def selection_statement(self):
assert self.match_identifier("IF"), self.advance()
assert self.match_punctuator("("), self.advance()
cond_expr = self.expression()
assert self.match_punctuator(")"), self.advance()
true_block = self.secondary_block()
if self.match_identifier("ELSE"):
else_block = self.secondary_block()
return Tree(
operation="if_else",
children=[cond_expr, true_block, else_block]
)
else:
return Tree(
operation="if",
children=[cond_expr, true_block]
)
def throw_statement(self):
assert self.match_identifier("THROW"), self.advance()
block = self.primary_expression()
if self.match_punctuator(","):
arg = self.primary_expression()
assert self.match_punctuator(";"), self.advance()
return Tree(
operation="throw_arg",
children=[block, arg]
)
else:
assert self.match_punctuator(";"), self.advance()
return Tree(
operation="throw",
children=[block]
)

82
python/elf.py
View File

@ -1,82 +0,0 @@
"""
#define EI_NIDENT 16
typedef struct {
unsigned char e_ident[EI_NIDENT];
uint16_t e_type;
uint16_t e_machine;
uint32_t e_version;
ElfN_Addr e_entry;
ElfN_Off e_phoff;
ElfN_Off e_shoff;
uint32_t e_flags;
uint16_t e_ehsize;
uint16_t e_phentsize;
uint16_t e_phnum;
uint16_t e_shentsize;
uint16_t e_shnum;
uint16_t e_shstrndx;
} ElfN_Ehdr;
"""
@dataclass
class ElfEhdr:
e_ident: bytes
e_type: int
e_machine: int
e_version: int
e_entry: int
e_phoff: int
e_shoff: int
e_flags: int
e_ehsize: int
e_phentsize: int
e_phnum: int
e_shentsize: int
e_shnum: int
e_shstrndx: int
ELFMAG0 = 0x7f
ELFMAG1 = ord('E')
ELFMAG2 = ord('L')
ELFMAG3 = ord('F')
EI_NIDENT = 16
elf_ident_fields = [
("EI_MAG0", 0),
("EI_MAG1", 1),
("EI_MAG2", 2),
("EI_MAG3", 3),
("EI_CLASS", 4),
("EI_DATA", 5),
("EI_VERSION", 6),
("EI_OSABI", 7),
("EI_ABIVERSION", 8),
("EI_PAD", 9),
]
class ElfClass(IntEnum):
NONE = 0
CLASS32 = 1
CLASS64 = 2
class ElfData(IntEnum):
NONE = 0
LSB = 1
MSB = 2
class OsABI(IntEnum):
NONE = 0
HPUX = 1
NETBSD = 2
GNU = 3
SOLARIS = 6
AIX = 7
IRIX = 8
FREEBSD = 9
TRU64 = 10
MODESTO = 11
OPENBSD = 12
ARM_AEABI = 64
ARM = 97
STANDALONE = 255

7
python/execute.py → python/emulator/execute.py
View File

@ -1,6 +1,5 @@
import instruction_properties
import impl2
from operations import zero_extend32, sign_extend32
from emulator import impl
from emulator.operations import zero_extend32, sign_extend32
from decode import decode_instruction, decode_variables
def delay_slot_state(cpu, ins):
@ -37,7 +36,7 @@ def step(cpu, mem):
# slot.
ins = decode_instruction(instruction)
variables = decode_variables(instruction, ins)
func = impl2.lookup[(ins.instruction, ins.operands)]
func = impl.lookup[(ins.instruction, ins.operands)]
func(cpu, mem, *variables)
delay_slot_state(cpu, ins)

4
python/impl2.py → python/emulator/impl.py
View File

@ -1,5 +1,4 @@
from operations import *
from log import log
from emulator.operations import *
class ILLSLOT(Exception):
pass
@ -661,7 +660,6 @@ def mac_w__multiply_and_accumulate_operation(cpu, mem, m, n):
if s == 1:
macl = sign_extend32(macl) + mul
temp = signed_saturate32(macl)
log(value1, value2, macl)
if macl == temp:
result = (mach << 32) | zero_extend32(macl)
else:

0
python/log.py → python/emulator/log.py
View File

0
python/mem.py → python/emulator/mem.py
View File

2
python/operations.py → python/emulator/operations.py
View File

@ -22,7 +22,7 @@ __all__ = [
def sign_extend(x, b):
m = 1 << (b - 1)
x = x & ((1 << b) - 1)
r = (x ^ m) - m;
r = (x ^ m) - m
return r
def sign_extend64(x):

0
python/sh2.py → python/emulator/sh2.py
View File

16
python/simulate.py → python/emulator/simulate.py
View File

@ -3,16 +3,16 @@ import curses.panel
from curses.textpad import Textbox, rectangle
import time
from dataclasses import dataclass
from sh2 import SH2
from impl2 import ILLSLOT, TRAP
from mem import Memory
import sys
from execute import step
from decode import decode_instruction, decode_variables
from operations import sign_extend32
from log import get_log, log, raw_log
from emulator.sh2 import SH2
from emulator.impl import ILLSLOT, TRAP
from emulator.mem import Memory
from emulator.execute import step
from emulator.operations import sign_extend32
from emulator.log import get_log, log, raw_log
from decode import decode_instruction, decode_variables
last_seen1 = {}
last_seen = {}

0
python/test_impl.py → python/emulator/test_impl.py
View File

88
python/generate.py
View File

@ -1,88 +0,0 @@
from instruction_table import untabulate_instructions
mode_name = {
'': 'no_operand',
'Rn': 'destination_operand_only',
'Rm': 'destination_operand_only',
'Rm,Rn': 'source_and_destination_operands',
'Rm,SR': 'transfer_to_sr',
'Rm,GBR': 'transfer_to_gbr',
'Rm,VBR': 'transfer_to_vbr',
'Rm,MACH': 'transfer_to_mach',
'Rm,MACL': 'transfer_to_macl',
'Rm,PR': 'transfer_to_pr',
'SR,Rn': 'transfer_from_sr',
'GBR,Rn': 'transfer_from_gbr',
'VBR,Rn': 'transfer_from_vbr',
'MACH,Rn': 'transfer_from_mach',
'MACL,Rn': 'transfer_from_macl',
'PR,Rn': 'transfer_from_pr',
'@Rn': 'destination_operand_only',
'Rm,@Rn': 'store_register_direct_data_transfer',
'@Rm,Rn': 'load_register_direct_data_transfer',
'@Rm+,@Rn+': 'multiply_and_accumulate_operation',
'@Rm+,Rn': 'load_direct_data_transfer_from_register',
'@Rm+,SR': 'load_to_sr',
'@Rm+,GBR': 'load_to_gbr',
'@Rm+,VBR': 'load_to_vbr',
'@Rm+,MACH': 'load_to_mach',
'@Rm+,MACL': 'load_to_macl',
'@Rm+,PR': 'load_to_pr',
'Rm,@–Rn': 'store_direct_data_transfer_from_register',
'SR,@–Rn': 'store_from_sr',
'GBR,@–Rn': 'store_from_gbr',
'VBR,@–Rn': 'store_from_vbr',
'MACH,@–Rn': 'store_from_mach',
'MACL,@–Rn': 'store_from_macl',
'PR,@–Rn': 'store_from_pr',
'R0,@(disp,Rn)': 'store_register_indirect_with_displacement',
'Rm,@(disp,Rn)': 'store_register_indirect_with_displacement',
'@(disp,Rm),R0': 'load_register_indirect_with_displacement',
'@(disp,Rm),Rn': 'load_register_indirect_with_displacement',
'Rm,@(R0,Rn)': 'store_indexed_register_indirect',
'@(R0,Rm),Rn': 'load_indexed_register_indirect',
'R0,@(disp,GBR)': 'store_gbr_indirect_with_displacement',
'@(disp,GBR),R0': 'load_gbr_indirect_with_displacement',
'#imm,@(R0,GBR)': 'store_indexed_gbr_indirect',
'@(R0,GBR),#imm': 'load_indexed_gbr_indirect',
'@(disp,PC),Rn': 'pc_relative_with_displacement',
'@(disp,PC),R0': 'pc_relative_with_displacement',
'label': 'pc_relative',
'#imm,Rn': 'immediate',
'#imm,R0': 'immediate',
'#imm': 'immediate',
}
def sanitize_instruction(ins):
name = ins.instruction.replace('.', '_').replace('/', '_').lower()
assert ins.operands in mode_name, (ins.instruction, ins.operands)
mode = mode_name[ins.operands]
return '__'.join([name, mode])
def main():
function_names = {}
instruction_table = untabulate_instructions()
for ins in instruction_table:
function_name = sanitize_instruction(ins)
instruction_operands = (ins.instruction, ins.operands)
assert function_name not in function_names, (instruction_operands, names[name])
function_names[function_name] = instruction_operands
if ins.variables:
args = f', {", ".join(ins.variables)}'
else:
args = ''
print(f"def {function_name}(cpu, mem{args}):")
print(f" # {ins.instruction} {ins.operands}")
print(f" raise NotImplementedError()")
print()
print("lookup = {")
for ins in instruction_table:
function_name = sanitize_instruction(ins)
i_space = ' ' * (len('CMP/STR') - len(ins.instruction))
o_space = ' ' * (len('@(disp,GBR),R0') - len(ins.operands))
print(f" ('{ins.instruction}'{i_space}, '{ins.operands}'{o_space}): {function_name},")
print("}")
if __name__ == "__main__":
main()

30
python/generate_python.py Normal file
View File

@ -0,0 +1,30 @@
from instruction_table import untabulate_instructions_sh2
from instruction_function_name import instruction_function_name
def main():
function_names = {}
instruction_table = untabulate_instructions_sh2()
for ins in instruction_table:
function_name = instruction_function_name(ins)
instruction_operands = (ins.instruction, ins.operands)
assert function_name not in function_names, (instruction_operands, function_names[function_name])
function_names[function_name] = instruction_operands
if ins.variables:
args = f', {", ".join(ins.variables)}'
else:
args = ''
print(f"def {function_name}(cpu, mem{args}):")
print(f" # {ins.instruction} {ins.operands}")
print(f" raise NotImplementedError()")
print()
print("lookup = {")
for ins in instruction_table:
function_name = instruction_function_name(ins)
i_space = ' ' * (len('CMP/STR') - len(ins.instruction))
o_space = ' ' * (len('@(disp,GBR),R0') - len(ins.operands))
print(f" ('{ins.instruction}'{i_space}, '{ins.operands}'{o_space}): {function_name},")
print("}")
if __name__ == "__main__":
main()

14
python/generate_sh4_directory.py Normal file
View File

@ -0,0 +1,14 @@
from instruction_table import untabulate_instructions_sh4
from instruction_file_name import instruction_file_name
for ins in untabulate_instructions_sh4():
code = list(f'{ins.code.code_bits:016b}')
for operand in ins.code.operands.values():
for i in range(operand.lsb, operand.lsb + operand.length):
code[15 - i] = operand.operand
file_name = instruction_file_name(ins)
path = os.path.join("sh4", file_name)
assert not os.path.exists(path)
with open(path, 'w') as f:
f.write(''.join(code) + '\n')

7
python/instruction_file_name.py Normal file
View File

@ -0,0 +1,7 @@
def instruction_file_name(ins):
if ins.operands:
file_name = ' '.join([ins.instruction, ins.operands])
else:
file_name = ins.instruction
file_name = file_name.replace('/', '_')
return file_name

118
python/instruction_function_name.py Normal file
View File

@ -0,0 +1,118 @@
mode_name = {
'': 'no_operand',
'Rn': 'destination_operand_only',
'Rm': 'destination_operand_only',
'Rm,Rn': 'source_and_destination_operands',
'Rm,SR': 'transfer_to_sr',
'Rm,SSR': 'transfer_to_ssr',
'Rm,SPC': 'transfer_to_spc',
'Rm,GBR': 'transfer_to_gbr',
'Rm,VBR': 'transfer_to_vbr',
'Rm,DBR': 'transfer_to_dbr',
'Rm,MACH': 'transfer_to_mach',
'Rm,MACL': 'transfer_to_macl',
'Rm,Rn_BANK': 'transfer_to_rn_bank',
'Rm,PR': 'transfer_to_pr',
'SR,Rn': 'transfer_from_sr',
'SSR,Rn': 'transfer_from_ssr',
'SPC,Rn': 'transfer_from_spc',
'GBR,Rn': 'transfer_from_gbr',
'VBR,Rn': 'transfer_from_vbr',
'DBR,Rn': 'transfer_from_dbr',
'SGR,Rn': 'transfer_from_sgr',
'MACH,Rn': 'transfer_from_mach',
'MACL,Rn': 'transfer_from_macl',
'Rm_BANK,Rn': 'transfer_from_rm_bank',
'PR,Rn': 'transfer_from_pr',
'@Rn': 'destination_operand_only',
'Rm,@Rn': 'store_register_direct_data_transfer',
'R0,@Rn': 'r0_store_register_direct_data_transfer',
'@Rm,Rn': 'load_register_direct_data_transfer',
'@Rm+,@Rn+': 'multiply_and_accumulate_operation',
'@Rm+,Rn': 'load_direct_data_transfer_from_register',
'@Rm+,SR': 'load_to_sr',
'@Rm+,SSR': 'load_to_ssr',
'@Rm+,SPC': 'load_to_spc',
'@Rm+,GBR': 'load_to_gbr',
'@Rm+,VBR': 'load_to_vbr',
'@Rm+,DBR': 'load_to_dbr',
'@Rm+,MACH': 'load_to_mach',
'@Rm+,MACL': 'load_to_macl',
'@Rm+,Rn_BANK': 'load_to_rn_bank',
'@Rm+,PR': 'load_to_pr',
'Rm,@-Rn': 'store_direct_data_transfer_from_register',
'SR,@-Rn': 'store_from_sr',
'SSR,@-Rn': 'store_from_ssr',
'SPC,@-Rn': 'store_from_spc',
'GBR,@-Rn': 'store_from_gbr',
'VBR,@-Rn': 'store_from_vbr',
'DBR,@-Rn': 'store_from_dbr',
'SGR,@-Rn': 'store_from_sgr',
'MACH,@-Rn': 'store_from_mach',
'MACL,@-Rn': 'store_from_macl',
'Rm_BANK,@-Rn': 'store_from_rm_bank',
'PR,@-Rn': 'store_from_pr',
'R0,@(disp,Rn)': 'store_register_indirect_with_displacement',
'Rm,@(disp,Rn)': 'store_register_indirect_with_displacement',
'@(disp,Rm),R0': 'load_register_indirect_with_displacement',
'@(disp,Rm),Rn': 'load_register_indirect_with_displacement',
'Rm,@(R0,Rn)': 'store_indexed_register_indirect',
'@(R0,Rm),Rn': 'load_indexed_register_indirect',
'R0,@(disp,GBR)': 'store_gbr_indirect_with_displacement',
'@(disp,GBR),R0': 'load_gbr_indirect_with_displacement',
'#imm,@(R0,GBR)': 'store_indexed_gbr_indirect',
'@(R0,GBR),#imm': 'load_indexed_gbr_indirect',
'@(disp,PC),Rn': 'pc_relative_with_displacement',
'@(disp,PC),R0': 'pc_relative_with_displacement',
'label': 'pc_relative',
'#imm,Rn': 'immediate',
'#imm,R0': 'immediate',
'#imm': 'immediate',
# floating point
'FRn': 'destination_operand_only',
'DRn': 'destination_operand_only_double',
'FRm,FRn': 'source_and_destination_operands',
'DRm,DRn': 'source_and_destination_operands_double',
'XDm,XDn': 'source_and_destination_operands_bank',
'DRm,XDn': 'double_to_bank',
'XDm,DRn': 'bank_to_double',
'@Rm,FRn': 'load_register_direct_data_transfer',
'@Rm,DRn': 'load_register_direct_data_transfer_double',
'@Rm,XDn': 'load_register_direct_data_transfer_bank',
'@(R0,Rm),FRn': 'load_indexed_register_indirect',
'@(R0,Rm),DRn': 'load_indexed_register_indirect_double',
'@(R0,Rm),XDn': 'load_indexed_register_indirect_bank',
'@Rm+,FRn': 'load_direct_data_transfer_from_register',
'@Rm+,DRn': 'load_direct_data_transfer_from_register_double',
'@Rm+,XDn': 'load_direct_data_transfer_from_register_bank',
'FRm,@Rn': 'store_register_direct_data_transfer',
'DRm,@Rn': 'store_register_direct_data_transfer_double',
'XDm,@Rn': 'store_register_direct_data_transfer_bank',
'FRm,@-Rn': 'store_direct_data_transfer_from_register',
'DRm,@-Rn': 'store_direct_data_transfer_from_register_double',
'XDm,@-Rn': 'store_direct_data_transfer_from_register_bank',
'FRm,@(R0,Rn)': 'store_indexed_register_indirect',
'DRm,@(R0,Rn)': 'store_indexed_register_indirect_double',
'XDm,@(R0,Rn)': 'store_indexed_register_indirect_bank',
'FRm,FPUL': 'frm_to_fpul',
'DRm,FPUL': 'drm_to_fpul',
'FPUL,FRn': 'fpul_to_frn',
'FPUL,DRn': 'fpul_to_drn',
'FR0,FRm,FRn': 'fr0_frm_frn',
'Rm,FPSCR': 'transfer_to_fpscr',
'Rm,FPUL': 'transfer_to_fpul',
'@Rm+,FPSCR': 'load_to_fpscr',
'@Rm+,FPUL': 'load_to_fpul',
'FPSCR,Rn': 'transfer_from_fpscr',
'FPUL,Rn': 'transfer_from_fpul',
'FPUL,@-Rn': 'store_from_fpul',
'FPSCR,@-Rn': 'store_from_fpscr',
'FVm,FVn': 'fvm_fvn',
'XMTRX,FVn': 'xmtrx_fvn',
}
def instruction_function_name(ins):
name = ins.instruction.replace('.', '_').replace('/', '_').lower()
assert ins.operands in mode_name, (ins.instruction, ins.operands)
mode = mode_name[ins.operands]
return '__'.join([name, mode])

20
python/instruction_table.py
View File

@ -223,7 +223,7 @@ def untabulate_instructions_sh2():
("t_bit" , 102)
]))
return untabulate_instructions(os.path.join(directory, "sh2.txt"), columns)
return untabulate_instructions(os.path.join(directory, "..", "sh2.txt"), columns)
def untabulate_instructions_sh4():
columns = dict(column_bounds([
@ -235,20 +235,4 @@ def untabulate_instructions_sh4():
("t_bit" , 116)
]))
return untabulate_instructions(os.path.join(directory, "sh4.txt"), columns)
l = untabulate_instructions_sh4()
from pprint import pprint
for ins in list(l):
if ins.operands:
fn = ' '.join([ins.instruction, ins.operands])
else:
fn = ins.instruction
fn = fn.replace('/', '_')
code = list(f'{ins.code.code_bits:016b}')
for operand in ins.code.operands.values():
for i in range(operand.lsb, operand.lsb + operand.length):
code[15 - i] = operand.operand
with open(os.path.join(directory, "sh4", fn), 'w') as f:
f.write(''.join(code) + '\n')
return untabulate_instructions(os.path.join(directory, "..", "sh4.txt"), columns)

40
test_lexer.py Normal file
View File

@ -0,0 +1,40 @@
import os
import os.path
from lexer import Lexer, IntegerConstant, Punctuator, Identifier
def is_instruction_descriptor(s):
return all(c in {'0', '1', 'n', 'm', 'i', 'd'} for c in s)
def parse_file(path):
with open(path) as f:
buf = f.read()
lines = buf.split('\n', maxsplit=2)
assert len(lines[0]) == 16 and is_instruction_descriptor(lines[0]), lines[0]
if lines[1].startswith('Available only when'):
buf = lines[2]
else:
if len(lines) >= 3:
buf = '\n'.join([lines[1], lines[2]])
else:
buf = lines[1]
lexer = Lexer(buf)
while True:
try:
token = lexer.next_token()
except IndexError:
break
yield token
files = os.listdir('sh4')
for filename in files:
if filename.startswith('F'):
continue
path = os.path.join('sh4', filename)
for token in parse_file(path):
if type(token) is Identifier:
print(token.token)

39
test_parser.py Normal file
View File

@ -0,0 +1,39 @@
from lexer import Lexer
from parser import Parser
from generator import generate
sources = [
"op1 ← FloatValue64(DR2n);",
"UTLB[MMUCR.URC].ASID ← PTEH.ASID;",
"IF (n_field = m_field)"
"{"
"m_address ← m_address + 4;"
"n_address ← n_address + 4;"
"}",
"""
IF (op1 ≥ 0)
op2 ← op2 << shift_amount;
ELSE IF (shift_amount ≠ 0)
op2 ← op2 >> (32 - shift_amount);
"""
]
def all_tokens(lexer):
while True:
try:
token = lexer.next_token()
except IndexError:
break
yield token
for source in sources:
lexer = Lexer(source)
tokens = list(all_tokens(lexer))
parser = Parser(tokens)
from pprint import pprint
root = parser.statement()
s = "".join(generate(root))
print(s, end='')
print()

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import sys
import os
from lexer import Lexer
from parser import Parser
from generator import generate, CTX
from instruction_table import untabulate_instructions_sh4
from instruction_table import untabulate_instructions_sh2
from instruction_function_name import instruction_function_name
from instruction_file_name import instruction_file_name
from instruction_properties import has_delay_slot
def is_instruction_descriptor(s):
return all(c in {'0', '1', 'n', 'm', 'i', 'd'} for c in s)
def parse_file(path):
with open(path) as f:
buf = f.read()
lines = buf.split('\n', maxsplit=2)
assert len(lines[0]) == 16 and is_instruction_descriptor(lines[0]), lines[0]
if lines[1].startswith('Available only when'):
buf = lines[2]
else:
if len(lines) >= 3:
buf = '\n'.join([lines[1], lines[2]])
else:
buf = lines[1]
lexer = Lexer(buf)
while True:
try:
token = lexer.next_token()
except IndexError:
break
yield token
def generate_function_declaration(instruction_name, function_name, variables):
args = ", ".join([
"struct architectural_state * state",
"struct memory_map * map",
*[
f"const uint32_t {x}"
for x in variables
]
])
yield f"/* {instruction_name} */"
yield f"void {function_name}({args})"
def generate_file(instruction_name, function_name, variables, delay_slot, src_path):
tokens = list(parse_file(src_path))
parser = Parser(tokens)
ctx = CTX(identifiers=set())
yield from generate_function_declaration(instruction_name, function_name, variables)
yield "{"
output = []
while parser.tokens[parser.pos:]:
stmt = parser.statement()
src = "".join(generate(ctx, stmt))
output.append(src)
for line in "".join(output).rstrip().split('\n'):
yield f" {line}"
yield ""
yield f" state->is_delay_slot = {delay_slot};"
yield "}"
yield ""
yield ""
def main():
output = [
'#include "impl.h"',
'#include "operations.h"',
'#include "exception.h"',
'#include "state_helpers.h"',
'',
]
header_output = [
'#pragma once',
'',
'#include "state.h"',
'#include "memory_map.h"',
'',
]
sh2_instructions = set((ins.instruction, ins.operands) for ins in untabulate_instructions_sh2())
for ins in untabulate_instructions_sh4():
if (ins.instruction, ins.operands) not in sh2_instructions:
continue
_name = [ins.instruction, ins.operands] if ins.operands else [ins.instruction]
instruction_name = " ".join(_name)
function_name = instruction_function_name(ins)
file_name = instruction_file_name(ins)
src_path = os.path.join("sh4", file_name)
delay_slot = "true" if has_delay_slot(ins) else "false"
gen = generate_file(instruction_name, function_name, ins.variables, delay_slot, src_path)
output.extend(gen)
gen = generate_function_declaration(instruction_name, function_name, ins.variables)
lgen = list(gen)
lgen[-1] += ';'
header_output.extend(lgen)
with open(sys.argv[1], "w") as f:
f.write("\n".join(output))
with open(sys.argv[2], "w") as f:
f.write("\n".join(header_output))
if __name__ == '__main__':
main()