Reintroduce float32_to_float64 that was removed here:
https://lists.gnu.org/archive/html/qemu-devel/2018-04/msg00455.html
- nbench test it not actually calling this function at all
- SPECS 2006 significat number of tests impoved their runtime, just
few of them showed small slowdown
Signed-off-by: Matus Kysel <mky...@tachyum.com>
---
fpu/softfloat.c | 15 ++++++++++++++-
1 file changed, 14 insertions(+), 1 deletion(-)
diff --git a/fpu/softfloat.c b/fpu/softfloat.c
index 0638c9f4e0..e28ea3f933 100644
--- a/fpu/softfloat.c
+++ b/fpu/softfloat.c
@@ -1920,13 +1920,26 @@ float16 float32_to_float16(float32 a, bool ieee,
float_status *s)
return float16a_round_pack_canonical(pr, s, fmt16);
}
-float64 float32_to_float64(float32 a, float_status *s)
+static float64 QEMU_SOFTFLOAT_ATTR
+soft_float32_to_float64(float32 a, float_status *s)
{
FloatParts p = float32_unpack_canonical(a, s);
FloatParts pr = float_to_float(p, &float64_params, s);
return float64_round_pack_canonical(pr, s);
}
+float64 float32_to_float64(float32 a, float_status *status)
+{
+ if (unlikely(!float32_is_normal(a))) {
+ return soft_float32_to_float64(a, status);
+ } else if (float32_is_zero(a)) {
+ return float64_set_sign(float64_zero, float32_is_neg(a));
+ } else {
+ double r = *(float *)&a;
+ return *(float64 *)&r;
+ }
+}
+
float16 float64_to_float16(float64 a, bool ieee, float_status *s)
{
const FloatFmt *fmt16 = ieee ? &float16_params : &float16_params_ahp;
--
2.17.1
