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[Qemu-devel] [PATCH 1/7] rsqrte_f32: No need to copy sign bit.
From: |
Peter Maydell |
Subject: |
[Qemu-devel] [PATCH 1/7] rsqrte_f32: No need to copy sign bit. |
Date: |
Thu, 20 Oct 2011 14:16:02 +0100 |
From: Christophe LYON <address@hidden>
Indeed, the result is known to be always positive.
Signed-off-by: Christophe Lyon <address@hidden>
Signed-off-by: Peter Maydell <address@hidden>
---
target-arm/helper.c | 3 +--
1 files changed, 1 insertions(+), 2 deletions(-)
diff --git a/target-arm/helper.c b/target-arm/helper.c
index e2428eb..17ef98b 100644
--- a/target-arm/helper.c
+++ b/target-arm/helper.c
@@ -3039,8 +3039,7 @@ float32 HELPER(rsqrte_f32)(float32 a, CPUState *env)
val64 = float64_val(f64);
- val = ((val64 >> 63) & 0x80000000)
- | ((result_exp & 0xff) << 23)
+ val = ((result_exp & 0xff) << 23)
| ((val64 >> 29) & 0x7fffff);
return make_float32(val);
}
--
1.7.1
- [Qemu-devel] [PULL 0/7] target-arm queue, Peter Maydell, 2011/10/20
- [Qemu-devel] [PATCH 3/7] target-arm: Rename ARM_FEATURE_DIV to _THUMB_DIV, Peter Maydell, 2011/10/20
- [Qemu-devel] [PATCH 7/7] target-arm/machine.c: Restore VFP registers correctly, Peter Maydell, 2011/10/20
- [Qemu-devel] [PATCH 5/7] softfloat: Implement fused multiply-add, Peter Maydell, 2011/10/20
- [Qemu-devel] [PATCH 2/7] target-arm: v6 media multiply space: UNDEF on unassigned encodings, Peter Maydell, 2011/10/20
- [Qemu-devel] [PATCH 4/7] target-arm: Add ARM UDIV/SDIV support, Peter Maydell, 2011/10/20
- [Qemu-devel] [PATCH 6/7] target-arm: Implement VFPv4 fused multiply-accumulate insns, Peter Maydell, 2011/10/20
- [Qemu-devel] [PATCH 1/7] rsqrte_f32: No need to copy sign bit.,
Peter Maydell <=