81053b7fcb
- Align DLLEXPORT in definitions and declations. There is still a few cases left, where the declation in the compiler's complex.h disagrees with the implementation here. For now we can't do anything about that, but maybe should be revisited in the future. - Fix the syntax on an .ascii directive that gcc accepted mistakingly, but clang does not.
63 lines
2 KiB
C
63 lines
2 KiB
C
/* From: @(#)k_sin.c 1.3 95/01/18 */
|
|
/*
|
|
* ====================================================
|
|
* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
|
|
* Copyright (c) 2008 Steven G. Kargl, David Schultz, Bruce D. Evans.
|
|
*
|
|
* Developed at SunSoft, a Sun Microsystems, Inc. business.
|
|
* Permission to use, copy, modify, and distribute this
|
|
* software is freely granted, provided that this notice
|
|
* is preserved.
|
|
* ====================================================
|
|
*/
|
|
|
|
#include "cdefs-compat.h"
|
|
//__FBSDID("$FreeBSD: src/lib/msun/ld80/k_sinl.c,v 1.1 2008/02/17 07:32:14 das Exp $");
|
|
|
|
/*
|
|
* ld80 version of k_sin.c. See ../src/k_sin.c for most comments.
|
|
*/
|
|
|
|
#include "math_private.h"
|
|
|
|
static const double
|
|
half = 0.5;
|
|
|
|
/*
|
|
* Domain [-0.7854, 0.7854], range ~[-1.89e-22, 1.915e-22]
|
|
* |sin(x)/x - s(x)| < 2**-72.1
|
|
*
|
|
* See ../ld80/k_cosl.c for more details about the polynomial.
|
|
*/
|
|
#if defined(__amd64__) || defined(__i386__)
|
|
/* Long double constants are slow on these arches, and broken on i386. */
|
|
static const volatile double
|
|
S1hi = -0.16666666666666666, /* -0x15555555555555.0p-55 */
|
|
S1lo = -9.2563760475949941e-18; /* -0x15580000000000.0p-109 */
|
|
#define S1 ((long double)S1hi + S1lo)
|
|
#else
|
|
static const long double
|
|
S1 = -0.166666666666666666671L; /* -0xaaaaaaaaaaaaaaab.0p-66 */
|
|
#endif
|
|
|
|
static const double
|
|
S2 = 0.0083333333333333332, /* 0x11111111111111.0p-59 */
|
|
S3 = -0.00019841269841269427, /* -0x1a01a01a019f81.0p-65 */
|
|
S4 = 0.0000027557319223597490, /* 0x171de3a55560f7.0p-71 */
|
|
S5 = -0.000000025052108218074604, /* -0x1ae64564f16cad.0p-78 */
|
|
S6 = 1.6059006598854211e-10, /* 0x161242b90243b5.0p-85 */
|
|
S7 = -7.6429779983024564e-13, /* -0x1ae42ebd1b2e00.0p-93 */
|
|
S8 = 2.6174587166648325e-15; /* 0x179372ea0b3f64.0p-101 */
|
|
|
|
long double
|
|
__kernel_sinl(long double x, long double y, int iy)
|
|
{
|
|
long double z,r,v;
|
|
|
|
z = x*x;
|
|
v = z*x;
|
|
r = S2+z*(S3+z*(S4+z*(S5+z*(S6+z*(S7+z*S8)))));
|
|
if(iy==0) return x+v*(S1+z*r);
|
|
else return x-((z*(half*y-v*r)-y)-v*S1);
|
|
}
|