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Text file src/math/sin_386.s

Documentation: math

```     1	// Copyright 2009 The Go Authors. All rights reserved.
2	// Use of this source code is governed by a BSD-style
4
5	#include "textflag.h"
6
7	// func Cos(x float64) float64
8	TEXT ·Cos(SB),NOSPLIT,\$0
9		FMOVD   x+0(FP), F0  // F0=x
10		FCOS                 // F0=cos(x) if -2**63 < x < 2**63
11		FSTSW   AX           // AX=status word
12		ANDW    \$0x0400, AX
13		JNE     3(PC)        // jump if x outside range
14		FMOVDP  F0, ret+8(FP)
15		RET
16		FLDPI                // F0=Pi, F1=x
17		FADDD   F0, F0       // F0=2*Pi, F1=x
18		FXCHD   F0, F1       // F0=x, F1=2*Pi
19		FPREM1               // F0=reduced_x, F1=2*Pi
20		FSTSW   AX           // AX=status word
21		ANDW    \$0x0400, AX
22		JNE     -3(PC)       // jump if reduction incomplete
23		FMOVDP  F0, F1       // F0=reduced_x
24		FCOS                 // F0=cos(reduced_x)
25		FMOVDP  F0, ret+8(FP)
26		RET
27
28	// func Sin(x float64) float64
29	TEXT ·Sin(SB),NOSPLIT,\$0
30		FMOVD   x+0(FP), F0  // F0=x
31		FSIN                 // F0=sin(x) if -2**63 < x < 2**63
32		FSTSW   AX           // AX=status word
33		ANDW    \$0x0400, AX
34		JNE     3(PC)        // jump if x outside range
35		FMOVDP  F0, ret+8(FP)
36		RET
37		FLDPI                // F0=Pi, F1=x
38		FADDD   F0, F0       // F0=2*Pi, F1=x
39		FXCHD   F0, F1       // F0=x, F1=2*Pi
40		FPREM1               // F0=reduced_x, F1=2*Pi
41		FSTSW   AX           // AX=status word
42		ANDW    \$0x0400, AX
43		JNE     -3(PC)       // jump if reduction incomplete
44		FMOVDP  F0, F1       // F0=reduced_x
45		FSIN                 // F0=sin(reduced_x)
46		FMOVDP  F0, ret+8(FP)
47		RET
```

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