mirror of
https://github.com/golang/go
synced 2024-10-04 16:31:22 -06:00
718be3215f
(eliminate assumption of package global name space, make code easier to move between packages). R=r CC=golang-dev https://golang.org/cl/194072
46 lines
1.4 KiB
ArmAsm
46 lines
1.4 KiB
ArmAsm
// Copyright 2009 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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// func Cos(x float64) float64
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TEXT ·Cos(SB),7,$0
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FMOVD x+0(FP), F0 // F0=x
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FCOS // F0=cos(x) if -2**63 < x < 2**63
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FSTSW AX // AX=status word
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ANDW $0x0400, AX
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JNE 3(PC) // jump if x outside range
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FMOVDP F0, r+8(FP)
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RET
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FLDPI // F0=Pi, F1=x
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FADDD F0, F0 // F0=2*Pi, F1=x
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FXCHD F0, F1 // F0=x, F1=2*Pi
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FPREM1 // F0=reduced_x, F1=2*Pi
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FSTSW AX // AX=status word
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ANDW $0x0400, AX
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JNE -3(PC) // jump if reduction incomplete
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FMOVDP F0, F1 // F0=reduced_x
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FCOS // F0=cos(reduced_x)
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FMOVDP F0, r+8(FP)
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RET
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// func Sin(x float64) float64
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TEXT ·Sin(SB),7,$0
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FMOVD x+0(FP), F0 // F0=x
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FSIN // F0=sin(x) if -2**63 < x < 2**63
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FSTSW AX // AX=status word
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ANDW $0x0400, AX
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JNE 3(PC) // jump if x outside range
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FMOVDP F0, r+8(FP)
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RET
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FLDPI // F0=Pi, F1=x
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FADDD F0, F0 // F0=2*Pi, F1=x
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FXCHD F0, F1 // F0=x, F1=2*Pi
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FPREM1 // F0=reduced_x, F1=2*Pi
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FSTSW AX // AX=status word
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ANDW $0x0400, AX
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JNE -3(PC) // jump if reduction incomplete
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FMOVDP F0, F1 // F0=reduced_x
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FSIN // F0=sin(reduced_x)
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FMOVDP F0, r+8(FP)
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RET
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