mirror of
git://sourceware.org/git/newlib-cygwin.git
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048ebea981
Rename s_nearbyint.c, s_fdim.c and s_scalbln.c to remove conflicts
Remove functions that are not needed from above files
Modify include paths
Add includes missing in cygwin build
Add missing types
Create Makefiles
Create header files to resolve dependencies between directories
Modify some instances of unsigned long to uint64_t for 32 bit platforms
Add HAVE_FPMATH_H
63 lines
1.9 KiB
C
63 lines
1.9 KiB
C
/* From: @(#)k_sin.c 1.3 95/01/18 */
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/*
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* ====================================================
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* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
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* Copyright (c) 2008 Steven G. Kargl, David Schultz, Bruce D. Evans.
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*
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* Developed at SunSoft, a Sun Microsystems, Inc. business.
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* Permission to use, copy, modify, and distribute this
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* software is freely granted, provided that this notice
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* is preserved.
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* ====================================================
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* ld80 version of k_sin.c. See ../src/k_sin.c for most comments.
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*/
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#include <math.h>
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#include "../ld/math_private.h"
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static const double
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half = 0.5;
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/*
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* Domain [-0.7854, 0.7854], range ~[-1.89e-22, 1.915e-22]
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* |sin(x)/x - s(x)| < 2**-72.1
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*
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* See ../ld80/k_cosl.c for more details about the polynomial.
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*/
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#if defined(__amd64__) || defined(__i386__)
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/* Long double constants are slow on these arches, and broken on i386. */
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static const volatile double
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S1hi = -0.16666666666666666, /* -0x15555555555555.0p-55 */
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S1lo = -9.2563760475949941e-18; /* -0x15580000000000.0p-109 */
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#define S1 ((long double)S1hi + S1lo)
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#else
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static const long double
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S1 = -0.166666666666666666671L; /* -0xaaaaaaaaaaaaaaab.0p-66 */
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#endif
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static const double
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S2 = 0.0083333333333333332, /* 0x11111111111111.0p-59 */
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S3 = -0.00019841269841269427, /* -0x1a01a01a019f81.0p-65 */
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S4 = 0.0000027557319223597490, /* 0x171de3a55560f7.0p-71 */
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S5 = -0.000000025052108218074604, /* -0x1ae64564f16cad.0p-78 */
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S6 = 1.6059006598854211e-10, /* 0x161242b90243b5.0p-85 */
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S7 = -7.6429779983024564e-13, /* -0x1ae42ebd1b2e00.0p-93 */
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S8 = 2.6174587166648325e-15; /* 0x179372ea0b3f64.0p-101 */
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long double
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__kernel_sinl(long double x, long double y, int iy)
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{
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long double z,r,v;
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z = x*x;
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v = z*x;
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r = S2+z*(S3+z*(S4+z*(S5+z*(S6+z*(S7+z*S8)))));
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if(iy==0) return x+v*(S1+z*r);
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else return x-((z*(half*y-v*r)-y)-v*S1);
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}
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