diff options
| -rw-r--r-- | fpu/softfloat.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/fpu/softfloat.c b/fpu/softfloat.c index 0638c9f4e0..301ce3b537 100644 --- a/fpu/softfloat.c +++ b/fpu/softfloat.c @@ -1920,13 +1920,30 @@ 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 *s) +{ + if (likely(float32_is_normal(a))) { + /* Widening conversion can never produce inexact results. */ + union_float32 uf; + union_float64 ud; + uf.s = a; + ud.h = uf.h; + return ud.s; + } else if (float32_is_zero(a)) { + return float64_set_sign(float64_zero, float32_is_neg(a)); + } else { + return soft_float32_to_float64(a, s); + } +} + float16 float64_to_float16(float64 a, bool ieee, float_status *s) { const FloatFmt *fmt16 = ieee ? &float16_params : &float16_params_ahp; |