mirror of
https://github.com/golang/go
synced 2024-10-04 17:21:20 -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
32 lines
1023 B
ArmAsm
32 lines
1023 B
ArmAsm
// 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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// func Ceil(x float64) float64
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TEXT ·Ceil(SB),7,$0
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FMOVD x+0(FP), F0 // F0=x
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FSTCW -2(SP) // save old Control Word
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MOVW -2(SP), AX
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ANDW $0xf3ff, AX
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ORW $0x0800, AX // Rounding Control set to +Inf
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MOVW AX, -4(SP) // store new Control Word
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FLDCW -4(SP) // load new Control Word
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FRNDINT // F0=Ceil(x)
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FLDCW -2(SP) // load old Control Word
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FMOVDP F0, r+8(FP)
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RET
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// func Floor(x float64) float64
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TEXT ·Floor(SB),7,$0
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FMOVD x+0(FP), F0 // F0=x
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FSTCW -2(SP) // save old Control Word
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MOVW -2(SP), AX
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ANDW $0xf3ff, AX
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ORW $0x0400, AX // Rounding Control set to -Inf
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MOVW AX, -4(SP) // store new Control Word
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FLDCW -4(SP) // load new Control Word
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FRNDINT // F0=floor(x)
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FLDCW -2(SP) // load old Control Word
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FMOVDP F0, r+8(FP)
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RET
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