Imported Upstream version 60upstream/60

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