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s_sinf.c (152647) s_sinf.c (152869)
1/* s_sinf.c -- float version of s_sin.c.
2 * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
3 */
4
5/*
6 * ====================================================
7 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
8 *
9 * Developed at SunPro, a Sun Microsystems, Inc. business.
10 * Permission to use, copy, modify, and distribute this
11 * software is freely granted, provided that this notice
12 * is preserved.
13 * ====================================================
14 */
15
16#ifndef lint
1/* s_sinf.c -- float version of s_sin.c.
2 * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
3 */
4
5/*
6 * ====================================================
7 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
8 *
9 * Developed at SunPro, a Sun Microsystems, Inc. business.
10 * Permission to use, copy, modify, and distribute this
11 * software is freely granted, provided that this notice
12 * is preserved.
13 * ====================================================
14 */
15
16#ifndef lint
17static char rcsid[] = "$FreeBSD: head/lib/msun/src/s_sinf.c 152647 2005-11-21 04:57:12Z bde $";
17static char rcsid[] = "$FreeBSD: head/lib/msun/src/s_sinf.c 152869 2005-11-28 04:58:57Z bde $";
18#endif
19
20#include "math.h"
18#endif
19
20#include "math.h"
21#define INLINE_KERNEL_COSF
22#define INLINE_KERNEL_SINF
21#define INLINE_KERNEL_COSDF
22#define INLINE_KERNEL_SINDF
23#include "math_private.h"
24#include "k_cosf.c"
25#include "k_sinf.c"
26
27/* Small multiples of pi/2 rounded to double precision. */
28static const double
29s1pio2 = 1*M_PI_2, /* 0x3FF921FB, 0x54442D18 */
30s2pio2 = 2*M_PI_2, /* 0x400921FB, 0x54442D18 */
31s3pio2 = 3*M_PI_2, /* 0x4012D97C, 0x7F3321D2 */
32s4pio2 = 4*M_PI_2; /* 0x401921FB, 0x54442D18 */
33
23#include "math_private.h"
24#include "k_cosf.c"
25#include "k_sinf.c"
26
27/* Small multiples of pi/2 rounded to double precision. */
28static const double
29s1pio2 = 1*M_PI_2, /* 0x3FF921FB, 0x54442D18 */
30s2pio2 = 2*M_PI_2, /* 0x400921FB, 0x54442D18 */
31s3pio2 = 3*M_PI_2, /* 0x4012D97C, 0x7F3321D2 */
32s4pio2 = 4*M_PI_2; /* 0x401921FB, 0x54442D18 */
33
34static inline float
35__kernel_cosdf(double x)
36{
37 return __kernel_cosf((float)x, x - (float)x);
38}
39
40static inline float
41__kernel_sindf(double x)
42{
43 return __kernel_sinf((float)x, x - (float)x, 1);
44}
45
46float
47sinf(float x)
48{
49 float y[2];
50 int32_t n, hx, ix;
51
52 GET_FLOAT_WORD(hx,x);
53 ix = hx & 0x7fffffff;
54
55 if(ix <= 0x3f490fda) { /* |x| ~<= pi/4 */
56 if(ix<0x39800000) /* |x| < 2**-12 */
57 if(((int)x)==0) return x; /* x with inexact if x != 0 */
34float
35sinf(float x)
36{
37 float y[2];
38 int32_t n, hx, ix;
39
40 GET_FLOAT_WORD(hx,x);
41 ix = hx & 0x7fffffff;
42
43 if(ix <= 0x3f490fda) { /* |x| ~<= pi/4 */
44 if(ix<0x39800000) /* |x| < 2**-12 */
45 if(((int)x)==0) return x; /* x with inexact if x != 0 */
58 return __kernel_sinf(x,0.0,0);
46 return __kernel_sindf(x);
59 }
60 if(ix<=0x407b53d1) { /* |x| <= ~5*pi/4 */
61 if(ix<=0x4016cbe3) { /* |x| <= ~3pi/4 */
62 if(hx>0)
63 return __kernel_cosdf(x - s1pio2);
64 else
65 return -__kernel_cosdf(x + s1pio2);
66 } else

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78
79 /* sin(Inf or NaN) is NaN */
80 else if (ix>=0x7f800000) return x-x;
81
82 /* general argument reduction needed */
83 else {
84 n = __ieee754_rem_pio2f(x,y);
85 switch(n&3) {
47 }
48 if(ix<=0x407b53d1) { /* |x| <= ~5*pi/4 */
49 if(ix<=0x4016cbe3) { /* |x| <= ~3pi/4 */
50 if(hx>0)
51 return __kernel_cosdf(x - s1pio2);
52 else
53 return -__kernel_cosdf(x + s1pio2);
54 } else

--- 11 unchanged lines hidden (view full) ---

66
67 /* sin(Inf or NaN) is NaN */
68 else if (ix>=0x7f800000) return x-x;
69
70 /* general argument reduction needed */
71 else {
72 n = __ieee754_rem_pio2f(x,y);
73 switch(n&3) {
86 case 0: return __kernel_sinf(y[0],y[1],1);
87 case 1: return __kernel_cosf(y[0],y[1]);
88 case 2: return -__kernel_sinf(y[0],y[1],1);
74 case 0: return __kernel_sindf((double)y[0]+y[1]);
75 case 1: return __kernel_cosdf((double)y[0]+y[1]);
76 case 2: return -__kernel_sindf((double)y[0]+y[1]);
89 default:
77 default:
90 return -__kernel_cosf(y[0],y[1]);
78 return -__kernel_cosdf((double)y[0]+y[1]);
91 }
92 }
93}
79 }
80 }
81}