math: 386 FPU functions
sin, cos, tan, asin, acos, atan, exp, log, log10,
floor, ceil, and fabs
R=rsc
CC=golang-dev
https://golang.org/cl/189083
2010-01-15 14:21:36 -07:00
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// Copyright 2010 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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2013-08-12 11:25:18 -06:00
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#include "../../cmd/ld/textflag.h"
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math: 386 FPU functions
sin, cos, tan, asin, acos, atan, exp, log, log10,
floor, ceil, and fabs
R=rsc
CC=golang-dev
https://golang.org/cl/189083
2010-01-15 14:21:36 -07:00
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// func Asin(x float64) float64
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2013-08-12 11:25:18 -06:00
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TEXT ·Asin(SB),NOSPLIT,$0
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math: 386 FPU functions
sin, cos, tan, asin, acos, atan, exp, log, log10,
floor, ceil, and fabs
R=rsc
CC=golang-dev
https://golang.org/cl/189083
2010-01-15 14:21:36 -07:00
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FMOVD x+0(FP), F0 // F0=sin(x)
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FMOVD F0, F1 // F0=sin(x), F1=sin(x)
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FMULD F0, F0 // F0=sin(x)*sin(x), F1=sin(x)
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FLD1 // F0=1, F1=sin(x)*sin(x), F2=sin(x)
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FSUBRDP F0, F1 // F0=1-sin(x)*sin(x) (=cos(x)*cos(x)), F1=sin(x)
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FSQRT // F0=cos(x), F1=sin(x)
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FPATAN // F0=arcsin(sin(x))=x
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2013-03-22 10:57:55 -06:00
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FMOVDP F0, ret+8(FP)
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math: 386 FPU functions
sin, cos, tan, asin, acos, atan, exp, log, log10,
floor, ceil, and fabs
R=rsc
CC=golang-dev
https://golang.org/cl/189083
2010-01-15 14:21:36 -07:00
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RET
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// func Acos(x float64) float64
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2013-08-12 11:25:18 -06:00
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TEXT ·Acos(SB),NOSPLIT,$0
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math: 386 FPU functions
sin, cos, tan, asin, acos, atan, exp, log, log10,
floor, ceil, and fabs
R=rsc
CC=golang-dev
https://golang.org/cl/189083
2010-01-15 14:21:36 -07:00
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FMOVD x+0(FP), F0 // F0=cos(x)
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FMOVD F0, F1 // F0=cos(x), F1=cos(x)
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FMULD F0, F0 // F0=cos(x)*cos(x), F1=cos(x)
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FLD1 // F0=1, F1=cos(x)*cos(x), F2=cos(x)
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FSUBRDP F0, F1 // F0=1-cos(x)*cos(x) (=sin(x)*sin(x)), F1=cos(x)
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FSQRT // F0=sin(x), F1=cos(x)
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FXCHD F0, F1 // F0=cos(x), F1=sin(x)
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FPATAN // F0=arccos(cos(x))=x
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2013-03-22 10:57:55 -06:00
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FMOVDP F0, ret+8(FP)
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math: 386 FPU functions
sin, cos, tan, asin, acos, atan, exp, log, log10,
floor, ceil, and fabs
R=rsc
CC=golang-dev
https://golang.org/cl/189083
2010-01-15 14:21:36 -07:00
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RET
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