The difference between FMULX and FMUL is that FMULX will return 2.0f when one
operator is
FPInfinity and the other one is FPZero, whilst FMUL will return a Default NaN.
Without
this patch, the emulation would result in inconsistency.
Signed-off-by: Xiangyu Hu <libhu...@gmail.com>
---
target-arm/helper-a64.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/target-arm/helper-a64.c b/target-arm/helper-a64.c
index 81066ca..ebd9247 100644
--- a/target-arm/helper-a64.c
+++ b/target-arm/helper-a64.c
@@ -135,6 +135,9 @@ float32 HELPER(vfp_mulxs)(float32 a, float32 b, void *fpstp)
{
float_status *fpst = fpstp;
+ a = float32_squash_input_denormal(a, fpst);
+ b = float32_squash_input_denormal(b, fpst);
+
if ((float32_is_zero(a) && float32_is_infinity(b)) ||
(float32_is_infinity(a) && float32_is_zero(b))) {
/* 2.0 with the sign bit set to sign(A) XOR sign(B) */
@@ -148,6 +151,9 @@ float64 HELPER(vfp_mulxd)(float64 a, float64 b, void *fpstp)
{
float_status *fpst = fpstp;
+ a = float64_squash_input_denormal(a, fpst);
+ b = float64_squash_input_denormal(b, fpst);
+
if ((float64_is_zero(a) && float64_is_infinity(b)) ||
(float64_is_infinity(a) && float64_is_zero(b))) {
/* 2.0 with the sign bit set to sign(A) XOR sign(B) */
--
1.9.1
