go/src/math/sqrt_arm.s

// Copyright 2011 The Go Authors.  All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

#include "textflag.h"

// func Sqrt(x float64) float64	
TEXT ·Sqrt(SB),NOSPLIT,$0
	MOVD   x+0(FP),F0
	SQRTD  F0,F0
	MOVD  F0,ret+8(FP)
	RET
math: add sqrt_arm.s and sqrtGoC.go as fallback to soft fp emulation 5a: add SQRTF and SQRTD 5l: add ASQRTF and ASQRTD Use ARMv7 VFP VSQRT instruction to speed up math.Sqrt R=rsc, dave, m CC=golang-dev https://golang.org/cl/4551082 2011-06-09 15:19:08 -06:00			`// Copyright 2011 The Go Authors. All rights reserved.`
			`// Use of this source code is governed by a BSD-style`
			`// license that can be found in the LICENSE file.`

all: copy cmd/ld/textflag.h into pkg/GOOS_GOARCH The file is used by assembly code to define symbols like NOSPLIT. Having it hidden inside the cmd directory makes it hard to access outside the standard repository. Solution: As with a couple of other files used by cgo, copy the file into the pkg directory and add a -I argument to the assembler to access it. Thus one can write just #include "textflag.h" in .s files. The names in runtime are not updated because in the boot sequence the file has not been copied yet when runtime is built. All other .s files in the repository are updated. Changes to doc/asm.html, src/cmd/dist/build.c, and src/cmd/go/build.go are hand-made. The rest are just the renaming done by a global substitution. (Yay sam). LGTM=rsc R=rsc CC=golang-codereviews https://golang.org/cl/128050043 2014-08-12 18:04:45 -06:00			`#include "textflag.h"`
math: convert textflags from numbers to symbols R=golang-dev, bradfitz CC=golang-dev https://golang.org/cl/12773044 2013-08-12 11:25:18 -06:00
math: add sqrt_arm.s and sqrtGoC.go as fallback to soft fp emulation 5a: add SQRTF and SQRTD 5l: add ASQRTF and ASQRTD Use ARMv7 VFP VSQRT instruction to speed up math.Sqrt R=rsc, dave, m CC=golang-dev https://golang.org/cl/4551082 2011-06-09 15:19:08 -06:00			`// func Sqrt(x float64) float64`
math: convert textflags from numbers to symbols R=golang-dev, bradfitz CC=golang-dev https://golang.org/cl/12773044 2013-08-12 11:25:18 -06:00			`TEXT ·Sqrt(SB),NOSPLIT,$0`
math: add sqrt_arm.s and sqrtGoC.go as fallback to soft fp emulation 5a: add SQRTF and SQRTD 5l: add ASQRTF and ASQRTD Use ARMv7 VFP VSQRT instruction to speed up math.Sqrt R=rsc, dave, m CC=golang-dev https://golang.org/cl/4551082 2011-06-09 15:19:08 -06:00			`MOVD x+0(FP),F0`
			`SQRTD F0,F0`
build: update assembly variable names for vet R=golang-dev, r CC=golang-dev https://golang.org/cl/7834046 2013-03-22 10:57:55 -06:00			`MOVD F0,ret+8(FP)`
math: add sqrt_arm.s and sqrtGoC.go as fallback to soft fp emulation 5a: add SQRTF and SQRTD 5l: add ASQRTF and ASQRTD Use ARMv7 VFP VSQRT instruction to speed up math.Sqrt R=rsc, dave, m CC=golang-dev https://golang.org/cl/4551082 2011-06-09 15:19:08 -06:00			`RET`