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assembler: add support for VE_SAT/ME_SAT

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This commit is contained in:
Zack Buhman 2025-10-19 15:31:10 -05:00
parent c0cdfccefa
commit 6d0bc8538b
3 changed files with 23 additions and 2 deletions
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7
regs/assembler/emitter.py
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@ -38,16 +38,21 @@ def emit_destination_op(dst_op: DestinationOp):
math_inst = int(type(dst_op.opcode) is ME)
if dst_op.macro:
assert dst_op.opcode.value in {0, 1}
ve_sat = int((not math_inst) and dst_op.sat)
me_sat = int(math_inst and dst_op.sat)
value = (
pvs_dst.OPCODE_gen(dst_op.opcode.value)
| pvs_dst.MATH_INST_gen(math_inst)
| pvs_dst.MACRO_INST_gen(int(dst_op.macro))
| pvs_dst.REG_TYPE_gen(dst_reg_type(dst_op.type))
| pvs_dst.OFFSET_gen(dst_op.offset)
| pvs_dst.WE_X_gen(we_x(dst_op.write_enable))
| pvs_dst.WE_Y_gen(we_y(dst_op.write_enable))
| pvs_dst.WE_Z_gen(we_z(dst_op.write_enable))
| pvs_dst.WE_W_gen(we_w(dst_op.write_enable))
| pvs_dst.MACRO_INST_gen(int(dst_op.macro))
| pvs_dst.VE_SAT_gen(ve_sat)
| pvs_dst.ME_SAT_gen(me_sat)
)
yield value

2
regs/assembler/keywords.py
View File

@ -102,6 +102,7 @@ class KW(Enum):
relative_a0 = auto()
relative_i0 = auto()
constant = auto()
saturation = auto()
keywords = [
(KW.temporary , b"temporary" , b"temp"),
@ -114,6 +115,7 @@ keywords = [
(KW.relative_a0 , b"relative_a0" , None),
(KW.relative_i0 , b"relative_i0" , None),
(KW.constant , b"constant" , b"const"),
(KW.saturation , b"saturation" , b"sat"),
]
def find_keyword(b: memoryview):

16
regs/assembler/parser.py
View File

@ -25,6 +25,7 @@ class DestinationOp:
offset: int
write_enable: set[int]
opcode: Union[VE, ME]
sat: bool
macro: bool
@dataclass
@ -173,8 +174,21 @@ class Parser:
write_enable = parse_dest_write_enable(write_enable_token)
self.consume(TT.equal, "expected equals")
opcode = self.opcode()
sat = False
if self.match(TT.dot):
self.advance()
suffix = self.consume(TT.keyword, "expected saturation suffix")
if suffix.keyword is not KW.saturation:
raise ParserError("expected saturation suffix", token)
sat = True
macro = False
return DestinationOp(destination_type, offset_value, write_enable, opcode, macro)
return DestinationOp(type=destination_type,
offset=offset_value,
write_enable=write_enable,
opcode=opcode,
sat=sat,
macro=macro)
def source_type(self):
token = self.consume(TT.keyword, "expected source type")