mirror of https://go.googlesource.com/go
71 lines
1.2 KiB
ArmAsm
71 lines
1.2 KiB
ArmAsm
// Copyright 2020 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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// Values returned from an FCLASS instruction.
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#define NegInf 0x001
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#define PosInf 0x080
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#define NaN 0x200
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// func archMax(x, y float64) float64
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TEXT ·archMax(SB),NOSPLIT,$0
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MOVD x+0(FP), F0
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MOVD y+8(FP), F1
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FCLASSD F0, X5
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FCLASSD F1, X6
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// +Inf special cases
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MOV $PosInf, X7
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BEQ X7, X5, isMaxX
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BEQ X7, X6, isMaxY
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// NaN special cases
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MOV $NaN, X7
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BEQ X7, X5, isMaxX
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BEQ X7, X6, isMaxY
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// normal case
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FMAXD F0, F1, F0
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MOVD F0, ret+16(FP)
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RET
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isMaxX: // return x
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MOVD F0, ret+16(FP)
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RET
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isMaxY: // return y
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MOVD F1, 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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MOVD x+0(FP), F0
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MOVD y+8(FP), F1
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FCLASSD F0, X5
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FCLASSD F1, X6
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// -Inf special cases
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MOV $NegInf, X7
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BEQ X7, X5, isMinX
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BEQ X7, X6, isMinY
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// NaN special cases
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MOV $NaN, X7
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BEQ X7, X5, isMinX
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BEQ X7, X6, isMinY
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// normal case
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FMIND F0, F1, F0
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MOVD F0, ret+16(FP)
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RET
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isMinX: // return x
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MOVD F0, ret+16(FP)
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RET
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isMinY: // return y
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MOVD F1, ret+16(FP)
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RET
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