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-rw-r--r--target-tricore/op_helper.c27
1 files changed, 21 insertions, 6 deletions
diff --git a/target-tricore/op_helper.c b/target-tricore/op_helper.c
index ed26b302b0..08bf4ae0ed 100644
--- a/target-tricore/op_helper.c
+++ b/target-tricore/op_helper.c
@@ -443,13 +443,28 @@ target_ulong helper_msub32_ssov(CPUTriCoreState *env, target_ulong r1,
target_ulong helper_msub32_suov(CPUTriCoreState *env, target_ulong r1,
target_ulong r2, target_ulong r3)
{
- int64_t t1 = extract64(r1, 0, 32);
- int64_t t2 = extract64(r2, 0, 32);
- int64_t t3 = extract64(r3, 0, 32);
- int64_t result;
+ uint64_t t1 = extract64(r1, 0, 32);
+ uint64_t t2 = extract64(r2, 0, 32);
+ uint64_t t3 = extract64(r3, 0, 32);
+ uint64_t result;
+ uint64_t mul;
- result = t2 - (t1 * t3);
- return suov32_neg(env, result);
+ mul = (t1 * t3);
+ result = t2 - mul;
+
+ env->PSW_USB_AV = result ^ result * 2u;
+ env->PSW_USB_SAV |= env->PSW_USB_AV;
+ /* we calculate ovf by hand here, because the multiplication can overflow on
+ the host, which would give false results if we compare to less than
+ zero */
+ if (mul > t2) {
+ env->PSW_USB_V = (1 << 31);
+ env->PSW_USB_SV = (1 << 31);
+ result = 0;
+ } else {
+ env->PSW_USB_V = 0;
+ }
+ return result;
}
uint64_t helper_msub64_ssov(CPUTriCoreState *env, target_ulong r1,