mirror of
https://github.com/golang/go
synced 2024-11-19 20:54:39 -07:00
32 lines
1.0 KiB
ArmAsm
32 lines
1.0 KiB
ArmAsm
|
// Copyright 2010 The Go Authors. All rights reserved.
|
||
|
|
// Use of this source code is governed by a BSD-style
|
||
|
|
// license that can be found in the LICENSE file.
|
||
|
|
|
||
|
|
// func Ceil(x float64) float64
|
||
|
|
TEXT math·Ceil(SB),7,$0
|
||
|
|
FMOVD x+0(FP), F0 // F0=x
|
||
|
|
FSTCW -2(SP) // save old Control Word
|
||
|
|
MOVW -2(SP), AX
|
||
|
|
ANDW $0xf3ff, AX
|
||
|
|
ORW $0x0800, AX // Rounding Control set to +Inf
|
||
|
|
MOVW AX, -4(SP) // store new Control Word
|
||
|
|
FLDCW -4(SP) // load new Control Word
|
||
|
|
FRNDINT // F0=Ceil(x)
|
||
|
|
FLDCW -2(SP) // load old Control Word
|
||
|
|
FMOVDP F0, r+8(FP)
|
||
|
|
RET
|
||
|
|
|
||
|
|
// func Floor(x float64) float64
|
||
|
|
TEXT math·Floor(SB),7,$0
|
||
|
|
FMOVD x+0(FP), F0 // F0=x
|
||
|
|
FSTCW -2(SP) // save old Control Word
|
||
|
|
MOVW -2(SP), AX
|
||
|
|
ANDW $0xf3ff, AX
|
||
|
|
ORW $0x0400, AX // Rounding Control set to -Inf
|
||
|
|
MOVW AX, -4(SP) // store new Control Word
|
||
|
|
FLDCW -4(SP) // load new Control Word
|
||
|
|
FRNDINT // F0=floor(x)
|
||
|
|
FLDCW -2(SP) // load old Control Word
|
||
|
|
FMOVDP F0, r+8(FP)
|
||
|
|
RET
|