Deleted Added
full compact
s_tanf.c (176451) s_tanf.c (176552)
1/* s_tanf.c -- float version of s_tan.c.
2 * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
3 * Optimized by Bruce D. Evans.
4 */
5
6/*
7 * ====================================================
8 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
9 *
10 * Developed at SunPro, a Sun Microsystems, Inc. business.
11 * Permission to use, copy, modify, and distribute this
12 * software is freely granted, provided that this notice
13 * is preserved.
14 * ====================================================
15 */
16
17#include <sys/cdefs.h>
1/* s_tanf.c -- float version of s_tan.c.
2 * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
3 * Optimized by Bruce D. Evans.
4 */
5
6/*
7 * ====================================================
8 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
9 *
10 * Developed at SunPro, a Sun Microsystems, Inc. business.
11 * Permission to use, copy, modify, and distribute this
12 * software is freely granted, provided that this notice
13 * is preserved.
14 * ====================================================
15 */
16
17#include <sys/cdefs.h>
18__FBSDID("$FreeBSD: head/lib/msun/src/s_tanf.c 176451 2008-02-22 02:30:36Z das $");
18__FBSDID("$FreeBSD: head/lib/msun/src/s_tanf.c 176552 2008-02-25 13:33:20Z bde $");
19
20#include "math.h"
21#define INLINE_KERNEL_TANDF
22#include "math_private.h"
23#include "k_tanf.c"
24
25/* Small multiples of pi/2 rounded to double precision. */
26static const double
27t1pio2 = 1*M_PI_2, /* 0x3FF921FB, 0x54442D18 */
28t2pio2 = 2*M_PI_2, /* 0x400921FB, 0x54442D18 */
29t3pio2 = 3*M_PI_2, /* 0x4012D97C, 0x7F3321D2 */
30t4pio2 = 4*M_PI_2; /* 0x401921FB, 0x54442D18 */
31
32float
33tanf(float x)
34{
19
20#include "math.h"
21#define INLINE_KERNEL_TANDF
22#include "math_private.h"
23#include "k_tanf.c"
24
25/* Small multiples of pi/2 rounded to double precision. */
26static const double
27t1pio2 = 1*M_PI_2, /* 0x3FF921FB, 0x54442D18 */
28t2pio2 = 2*M_PI_2, /* 0x400921FB, 0x54442D18 */
29t3pio2 = 3*M_PI_2, /* 0x4012D97C, 0x7F3321D2 */
30t4pio2 = 4*M_PI_2; /* 0x401921FB, 0x54442D18 */
31
32float
33tanf(float x)
34{
35 float y[2];
35 double y;
36 int32_t n, hx, ix;
37
38 GET_FLOAT_WORD(hx,x);
39 ix = hx & 0x7fffffff;
40
41 if(ix <= 0x3f490fda) { /* |x| ~<= pi/4 */
42 if(ix<0x39800000) /* |x| < 2**-12 */
43 if(((int)x)==0) return x; /* x with inexact if x != 0 */

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

56 return __kernel_tandf(x + (hx>0 ? -t4pio2 : t4pio2), 1);
57 }
58
59 /* tan(Inf or NaN) is NaN */
60 else if (ix>=0x7f800000) return x-x;
61
62 /* general argument reduction needed */
63 else {
36 int32_t n, hx, ix;
37
38 GET_FLOAT_WORD(hx,x);
39 ix = hx & 0x7fffffff;
40
41 if(ix <= 0x3f490fda) { /* |x| ~<= pi/4 */
42 if(ix<0x39800000) /* |x| < 2**-12 */
43 if(((int)x)==0) return x; /* x with inexact if x != 0 */

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

56 return __kernel_tandf(x + (hx>0 ? -t4pio2 : t4pio2), 1);
57 }
58
59 /* tan(Inf or NaN) is NaN */
60 else if (ix>=0x7f800000) return x-x;
61
62 /* general argument reduction needed */
63 else {
64 n = __ieee754_rem_pio2f(x,y);
64 n = __ieee754_rem_pio2f(x,&y);
65 /* integer parameter: 1 -- n even; -1 -- n odd */
65 /* integer parameter: 1 -- n even; -1 -- n odd */
66 return __kernel_tandf((double)y[0]+y[1],1-((n&1)<<1));
66 return __kernel_tandf(y,1-((n&1)<<1));
67 }
68}
67 }
68}