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| author | Peter Maydell <peter.maydell@linaro.org> | 2011-03-14 15:37:13 +0000 |
|---|---|---|
| committer | Aurelien Jarno <aurelien@aurel32.net> | 2011-03-22 07:59:07 +0100 |
| commit | 6aae3df15dc31f3635efe6e4d4605a6f16888a1b (patch) | |
| tree | 12d7b40ab2dc9fef43bc3bf0b08917d1eb712316 /target-arm/helper.c | |
| parent | dda3ec490cf6a5927a9c6829654481101bfeda61 (diff) | |
| download | qemu-6aae3df15dc31f3635efe6e4d4605a6f16888a1b.zip | |
target-arm: use make_float32() to make constant floats for VRSQRTS
The preferred way to create a constant floating point value is to use
make_float32() rather than doing a runtime int32_to_float32().
Convert the code in the VRSQRTS helper to work this way.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Diffstat (limited to 'target-arm/helper.c')
| -rw-r--r-- | target-arm/helper.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/target-arm/helper.c b/target-arm/helper.c index 6c0e59f15a..78f3d39203 100644 --- a/target-arm/helper.c +++ b/target-arm/helper.c @@ -2708,6 +2708,8 @@ uint32_t HELPER(vfp_fcvt_f32_to_f16)(float32 a, CPUState *env) } #define float32_two make_float32(0x40000000) +#define float32_three make_float32(0x40400000) +#define float32_one_point_five make_float32(0x3fc00000) float32 HELPER(recps_f32)(float32 a, float32 b, CPUState *env) { @@ -2722,16 +2724,13 @@ float32 HELPER(recps_f32)(float32 a, float32 b, CPUState *env) float32 HELPER(rsqrts_f32)(float32 a, float32 b, CPUState *env) { float_status *s = &env->vfp.standard_fp_status; - float32 two = int32_to_float32(2, s); - float32 three = int32_to_float32(3, s); float32 product; if ((float32_is_infinity(a) && float32_is_zero_or_denormal(b)) || (float32_is_infinity(b) && float32_is_zero_or_denormal(a))) { - product = float32_zero; - } else { - product = float32_mul(a, b, s); + return float32_one_point_five; } - return float32_div(float32_sub(three, product, s), two, s); + product = float32_mul(a, b, s); + return float32_div(float32_sub(float32_three, product, s), float32_two, s); } /* NEON helpers. */ |