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math: make sqrt smaller on AMD64

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This makes function fit in 16 bytes, saving 16 bytes.

Change-Id: Iac5d2add42f6dae985b2a5cbe19ad4bd4bcc92ec
Reviewed-on: https://go-review.googlesource.com/29151
Run-TryBot: Ilya Tocar <ilya.tocar@intel.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
This commit is contained in:
Ilya Tocar 2016-09-14 15:23:41 +03:00
parent fedb0b3018
commit 731b3ed18d
1 changed files with 3 additions and 3 deletions
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6
src/math/sqrt_amd64.s
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@ -6,7 +6,7 @@
// func Sqrt(x float64) float64
TEXT ·Sqrt(SB), NOSPLIT, $0
MOVSD x+0(FP), X0
SQRTSD X0, X1
MOVSD X1, ret+8(FP)
XORPS X0, X0 // break dependency
SQRTSD x+0(FP), X0
MOVSD X0, ret+8(FP)
RET