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[PATCH v2 3/4] target/m68k: fix FPSR quotient byte for fmod instruction
From: |
Mark Cave-Ayland |
Subject: |
[PATCH v2 3/4] target/m68k: fix FPSR quotient byte for fmod instruction |
Date: |
Wed, 4 Jan 2023 13:45:53 +0000 |
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>
---
target/m68k/fpu_helper.c | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)
diff --git a/target/m68k/fpu_helper.c b/target/m68k/fpu_helper.c
index 76b34b8988..5fd094a33c 100644
--- a/target/m68k/fpu_helper.c
+++ b/target/m68k/fpu_helper.c
@@ -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)
{
- uint32_t quotient;
- int sign;
+ uint64_t quotient;
+ 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, "ient,
+ &env->fp_status);
if (floatx80_is_any_nan(res->d)) {
return;
}
- sign = extractFloatx80Sign(res->d);
- quotient = floatx80_to_int32(floatx80_abs(res->d), &env->fp_status);
make_quotient(env, sign, quotient);
}
--
2.30.2