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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-16 19:23:18 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-16 19:23:18 +0000 |
| commit | 43a123c1ae6613b3efeed291fa552ecd909d3acf (patch) | |
| tree | fd92518b7024bc74031f78a1cf9e454b65e73665 /src/math/floor_386.s | |
| parent | Initial commit. (diff) | |
| download | golang-1.20-43a123c1ae6613b3efeed291fa552ecd909d3acf.tar.xz golang-1.20-43a123c1ae6613b3efeed291fa552ecd909d3acf.zip | |
Adding upstream version 1.20.14.upstream/1.20.14upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/math/floor_386.s')
| -rw-r--r-- | src/math/floor_386.s | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/src/math/floor_386.s b/src/math/floor_386.s new file mode 100644 index 0000000..1990cb0 --- /dev/null +++ b/src/math/floor_386.s @@ -0,0 +1,46 @@ +// 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. + +#include "textflag.h" + +// func archCeil(x float64) float64 +TEXT ·archCeil(SB),NOSPLIT,$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, ret+8(FP) + RET + +// func archFloor(x float64) float64 +TEXT ·archFloor(SB),NOSPLIT,$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, ret+8(FP) + RET + +// func archTrunc(x float64) float64 +TEXT ·archTrunc(SB),NOSPLIT,$0 + FMOVD x+0(FP), F0 // F0=x + FSTCW -2(SP) // save old Control Word + MOVW -2(SP), AX + ORW $0x0c00, AX // Rounding Control set to truncate + MOVW AX, -4(SP) // store new Control Word + FLDCW -4(SP) // load new Control Word + FRNDINT // F0=Trunc(x) + FLDCW -2(SP) // load old Control Word + FMOVDP F0, ret+8(FP) + RET |