mirror of https://go.googlesource.com/go
50 lines
963 B
ArmAsm
50 lines
963 B
ArmAsm
// Copyright 2016 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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#include "textflag.h"
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#define PosInf 0x7FF0000000000000
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#define NaN 0x7FF8000000000001
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#define NegInf 0xFFF0000000000000
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// func ·archMax(x, y float64) float64
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TEXT ·archMax(SB),NOSPLIT,$0
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// +Inf special cases
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MOVD $PosInf, R0
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MOVD x+0(FP), R1
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CMP R0, R1
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BEQ isPosInf
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MOVD y+8(FP), R2
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CMP R0, R2
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BEQ isPosInf
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// normal case
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FMOVD R1, F0
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FMOVD R2, F1
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FMAXD F0, F1, F0
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FMOVD F0, ret+16(FP)
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RET
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isPosInf: // return +Inf
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MOVD R0, ret+16(FP)
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RET
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// func archMin(x, y float64) float64
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TEXT ·archMin(SB),NOSPLIT,$0
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// -Inf special cases
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MOVD $NegInf, R0
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MOVD x+0(FP), R1
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CMP R0, R1
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BEQ isNegInf
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MOVD y+8(FP), R2
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CMP R0, R2
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BEQ isNegInf
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// normal case
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FMOVD R1, F0
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FMOVD R2, F1
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FMIND F0, F1, F0
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FMOVD F0, ret+16(FP)
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RET
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isNegInf: // return -Inf
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MOVD R0, ret+16(FP)
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RET
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