bilbo/sh-dis
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

fpu bugs

Browse Source
This commit is contained in:
Zack Buhman 2024-04-23 20:46:18 +08:00
parent 27d9958a0a
commit a3dcf24b1c
1 changed files with 9 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
c/fpu.h
View File

@ -165,10 +165,10 @@ static inline bool dn_f32_f32_f32(float32_t * a, float32_t * b, float32_t * c, u
if ((!is_nan_f32(*a)) && (!is_nan_f32(*b)) && (!is_nan_f32(*c))) { // neither input is a NaN if ((!is_nan_f32(*a)) && (!is_nan_f32(*b)) && (!is_nan_f32(*c))) { // neither input is a NaN
if (is_denormal_f32(*a) || is_denormal_f32(*b) || is_denormal_f32(*c)) { // either input is denormalized if (is_denormal_f32(*a) || is_denormal_f32(*b) || is_denormal_f32(*c)) { // either input is denormalized
fpscr->cause_fpu_error = 1; fpscr->cause_fpu_error = 1;
return false; // do not continue return true; // do not continue
} }
} }
return true; return false;
case 1: case 1:
/* /*
* When FPSCR.DN is 1, a positive denormalized number is treated as * When FPSCR.DN is 1, a positive denormalized number is treated as
@ -179,7 +179,7 @@ static inline bool dn_f32_f32_f32(float32_t * a, float32_t * b, float32_t * c, u
if (is_denormal_f32(*a)) *a = flush_to_zero_f32(*a); if (is_denormal_f32(*a)) *a = flush_to_zero_f32(*a);
if (is_denormal_f32(*b)) *b = flush_to_zero_f32(*b); if (is_denormal_f32(*b)) *b = flush_to_zero_f32(*b);
if (is_denormal_f32(*c)) *c = flush_to_zero_f32(*c); if (is_denormal_f32(*c)) *c = flush_to_zero_f32(*c);
return true; return false;
default: default:
assert(false); assert(false);
} }
@ -197,10 +197,10 @@ static inline bool dn_f32_f32(float32_t * a, float32_t * b, uint32_t * fps)
if ((!is_nan_f32(*a)) && (!is_nan_f32(*b))) { // neither input is a NaN if ((!is_nan_f32(*a)) && (!is_nan_f32(*b))) { // neither input is a NaN
if (is_denormal_f32(*a) || is_denormal_f32(*b)) { // either input is denormalized if (is_denormal_f32(*a) || is_denormal_f32(*b)) { // either input is denormalized
fpscr->cause_fpu_error = 1; fpscr->cause_fpu_error = 1;
return false; // do not continue return true; // do not continue
} }
} }
return true; return false;
case 1: case 1:
/* /*
* When FPSCR.DN is 1, a positive denormalized number is treated as * When FPSCR.DN is 1, a positive denormalized number is treated as
@ -210,7 +210,7 @@ static inline bool dn_f32_f32(float32_t * a, float32_t * b, uint32_t * fps)
*/ */
if (is_denormal_f32(*a)) *a = flush_to_zero_f32(*a); if (is_denormal_f32(*a)) *a = flush_to_zero_f32(*a);
if (is_denormal_f32(*b)) *b = flush_to_zero_f32(*b); if (is_denormal_f32(*b)) *b = flush_to_zero_f32(*b);
return true; return false;
default: default:
assert(false); assert(false);
} }
@ -440,7 +440,7 @@ static inline float64_t fabs_d(float64_t op1)
static inline float32_t fneg_s(float32_t op1) static inline float32_t fneg_s(float32_t op1)
{ {
op1.v ^= 0x80000000'00000000; op1.v ^= 0x80000000;
return op1; return op1;
} }
@ -496,7 +496,7 @@ static inline bool fcmpgt_s(float32_t op2, float32_t op1, uint32_t * fps)
if (dn_f32_f32(&op2, &op1, fps)) return false; if (dn_f32_f32(&op2, &op1, fps)) return false;
set_rounding_mode(fps); set_rounding_mode(fps);
bool result = f32_le(op1, op2); bool result = f32_le(op2, op1);
update_fpscr(fps); update_fpscr(fps);
return !result; return !result;
} }
@ -506,7 +506,7 @@ static inline bool fcmpgt_d(float64_t op2, float64_t op1, uint32_t * fps)
if (dn_f64_f64(&op2, &op1, fps)) return false; if (dn_f64_f64(&op2, &op1, fps)) return false;
set_rounding_mode(fps); set_rounding_mode(fps);
bool result = f64_le(op1, op2); bool result = f64_le(op2, op1);
update_fpscr(fps); update_fpscr(fps);
return !result; return !result;
} }