k_cosf.c (10b3b54548f2290bbe8d8f88c59c28d12b7a635d) k_cosf.c (2b795b29212bcb9a8463381b5146e80e17793dcc)
1/* k_cosf.c -- float version of k_cos.c
2 * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
3 * Debugged and optimized by Bruce D. Evans.
4 */
5
6/*
7 * ====================================================
8 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.

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25/* |cos(x) - c(x)| < 2**-34.1 (~[-5.37e-11, 5.295e-11]). */
26static const double
27one = 1.0,
28C0 = -0x1ffffffd0c5e81.0p-54, /* -0.499999997251031003120 */
29C1 = 0x155553e1053a42.0p-57, /* 0.0416666233237390631894 */
30C2 = -0x16c087e80f1e27.0p-62, /* -0.00138867637746099294692 */
31C3 = 0x199342e0ee5069.0p-68; /* 0.0000243904487962774090654 */
32
1/* k_cosf.c -- float version of k_cos.c
2 * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
3 * Debugged and optimized by Bruce D. Evans.
4 */
5
6/*
7 * ====================================================
8 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.

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

25/* |cos(x) - c(x)| < 2**-34.1 (~[-5.37e-11, 5.295e-11]). */
26static const double
27one = 1.0,
28C0 = -0x1ffffffd0c5e81.0p-54, /* -0.499999997251031003120 */
29C1 = 0x155553e1053a42.0p-57, /* 0.0416666233237390631894 */
30C2 = -0x16c087e80f1e27.0p-62, /* -0.00138867637746099294692 */
31C3 = 0x199342e0ee5069.0p-68; /* 0.0000243904487962774090654 */
32
33#ifndef INLINE_KERNEL_COSDF
34extern
33#ifdef INLINE_KERNEL_COSDF
34static __inline
35#endif
35#endif
36__inline float
36float
37__kernel_cosdf(double x)
38{
39 double r, w, z;
40
41 /* Try to optimize for parallel evaluation as in k_tanf.c. */
42 z = x*x;
43 w = z*z;
44 r = C2+z*C3;
45 return ((one+z*C0) + w*C1) + (w*z)*r;
46}
37__kernel_cosdf(double x)
38{
39 double r, w, z;
40
41 /* Try to optimize for parallel evaluation as in k_tanf.c. */
42 z = x*x;
43 w = z*z;
44 r = C2+z*C3;
45 return ((one+z*C0) + w*C1) + (w*z)*r;
46}