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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-28 13:14:23 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-28 13:14:23 +0000
commit73df946d56c74384511a194dd01dbe099584fd1a (patch)
treefd0bcea490dd81327ddfbb31e215439672c9a068 /src/math/asin_386.s
parentInitial commit. (diff)
downloadgolang-1.16-73df946d56c74384511a194dd01dbe099584fd1a.tar.xz
golang-1.16-73df946d56c74384511a194dd01dbe099584fd1a.zip
Adding upstream version 1.16.10.upstream/1.16.10upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/math/asin_386.s')
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1 files changed, 30 insertions, 0 deletions
diff --git a/src/math/asin_386.s b/src/math/asin_386.s
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+// 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 Asin(x float64) float64
+TEXT ·Asin(SB),NOSPLIT,$0
+ FMOVD x+0(FP), F0 // F0=sin(x)
+ FMOVD F0, F1 // F0=sin(x), F1=sin(x)
+ FMULD F0, F0 // F0=sin(x)*sin(x), F1=sin(x)
+ FLD1 // F0=1, F1=sin(x)*sin(x), F2=sin(x)
+ FSUBRDP F0, F1 // F0=1-sin(x)*sin(x) (=cos(x)*cos(x)), F1=sin(x)
+ FSQRT // F0=cos(x), F1=sin(x)
+ FPATAN // F0=arcsin(sin(x))=x
+ FMOVDP F0, ret+8(FP)
+ RET
+
+// func Acos(x float64) float64
+TEXT ·Acos(SB),NOSPLIT,$0
+ FMOVD x+0(FP), F0 // F0=cos(x)
+ FMOVD F0, F1 // F0=cos(x), F1=cos(x)
+ FMULD F0, F0 // F0=cos(x)*cos(x), F1=cos(x)
+ FLD1 // F0=1, F1=cos(x)*cos(x), F2=cos(x)
+ FSUBRDP F0, F1 // F0=1-cos(x)*cos(x) (=sin(x)*sin(x)), F1=cos(x)
+ FSQRT // F0=sin(x), F1=cos(x)
+ FXCHD F0, F1 // F0=cos(x), F1=sin(x)
+ FPATAN // F0=arccos(cos(x))=x
+ FMOVDP F0, ret+8(FP)
+ RET