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target/m68k: fix FPSR quotient byte for fmod instruction 

The FPSR quotient byte should be set to the value of the quotient and not the
result. Switch from using floatx80_mod() to floatx80_modrem() which returns
the quotient as a uint64_t which can be used for the quotient byte.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230114232959.118224-4-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This commit is contained in:
Mark Cave-Ayland 2023-01-14 23:29:58 +00:00 committed by Laurent Vivier
parent 60b598df6e
commit ad6dae3b33
1 changed files with 4 additions and 5 deletions
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9
target/m68k/fpu_helper.c
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@ -523,17 +523,16 @@ static void make_quotient(CPUM68KState *env, int sign, uint32_t quotient)
void HELPER(fmod)(CPUM68KState *env, FPReg *res, FPReg *val0, FPReg *val1) void HELPER(fmod)(CPUM68KState *env, FPReg *res, FPReg *val0, FPReg *val1)
{ {
uint32_t quotient; uint64_t quotient;
int sign; int sign = extractFloatx80Sign(val1->d) ^ extractFloatx80Sign(val0->d);
res->d = floatx80_mod(val1->d, val0->d, &env->fp_status); res->d = floatx80_modrem(val1->d, val0->d, true, &quotient,
&env->fp_status);
if (floatx80_is_any_nan(res->d)) { if (floatx80_is_any_nan(res->d)) {
return; return;
} }
sign = extractFloatx80Sign(res->d);
quotient = floatx80_to_int32(floatx80_abs(res->d), &env->fp_status);
make_quotient(env, sign, quotient); make_quotient(env, sign, quotient);
} }