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author | Ondřej Surý <ondrej@sury.org> | 2011-09-13 13:13:40 +0200 |
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committer | Ondřej Surý <ondrej@sury.org> | 2011-09-13 13:13:40 +0200 |
commit | 5ff4c17907d5b19510a62e08fd8d3b11e62b431d (patch) | |
tree | c0650497e988f47be9c6f2324fa692a52dea82e1 /src/pkg/math/asin_386.s | |
parent | 80f18fc933cf3f3e829c5455a1023d69f7b86e52 (diff) | |
download | golang-upstream/60.tar.gz |
Imported Upstream version 60upstream/60
Diffstat (limited to 'src/pkg/math/asin_386.s')
-rw-r--r-- | src/pkg/math/asin_386.s | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/src/pkg/math/asin_386.s b/src/pkg/math/asin_386.s new file mode 100644 index 000000000..93df552dc --- /dev/null +++ b/src/pkg/math/asin_386.s @@ -0,0 +1,28 @@ +// 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 Asin(x float64) float64 +TEXT ·Asin(SB),7,$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, r+8(FP) + RET + +// func Acos(x float64) float64 +TEXT ·Acos(SB),7,$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, r+8(FP) + RET |