diff options
Diffstat (limited to '3rdparty/SDL2/src/libm/s_cos.c')
-rw-r--r-- | 3rdparty/SDL2/src/libm/s_cos.c | 91 |
1 files changed, 0 insertions, 91 deletions
diff --git a/3rdparty/SDL2/src/libm/s_cos.c b/3rdparty/SDL2/src/libm/s_cos.c deleted file mode 100644 index 66b156c9f52..00000000000 --- a/3rdparty/SDL2/src/libm/s_cos.c +++ /dev/null @@ -1,91 +0,0 @@ -/* @(#)s_cos.c 5.1 93/09/24 */ -/* - * ==================================================== - * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. - * - * Developed at SunPro, a Sun Microsystems, Inc. business. - * Permission to use, copy, modify, and distribute this - * software is freely granted, provided that this notice - * is preserved. - * ==================================================== - */ - -#if defined(LIBM_SCCS) && !defined(lint) -static const char rcsid[] = - "$NetBSD: s_cos.c,v 1.7 1995/05/10 20:47:02 jtc Exp $"; -#endif - -/* cos(x) - * Return cosine function of x. - * - * kernel function: - * __kernel_sin ... sine function on [-pi/4,pi/4] - * __kernel_cos ... cosine function on [-pi/4,pi/4] - * __ieee754_rem_pio2 ... argument reduction routine - * - * Method. - * Let S,C and T denote the sin, cos and tan respectively on - * [-PI/4, +PI/4]. Reduce the argument x to y1+y2 = x-k*pi/2 - * in [-pi/4 , +pi/4], and let n = k mod 4. - * We have - * - * n sin(x) cos(x) tan(x) - * ---------------------------------------------------------- - * 0 S C T - * 1 C -S -1/T - * 2 -S -C T - * 3 -C S -1/T - * ---------------------------------------------------------- - * - * Special cases: - * Let trig be any of sin, cos, or tan. - * trig(+-INF) is NaN, with signals; - * trig(NaN) is that NaN; - * - * Accuracy: - * TRIG(x) returns trig(x) nearly rounded - */ - -#include "math_libm.h" -#include "math_private.h" - -libm_hidden_proto(cos) -#ifdef __STDC__ - double cos(double x) -#else - double cos(x) - double x; -#endif -{ - double y[2], z = 0.0; - int32_t n, ix; - - /* High word of x. */ - GET_HIGH_WORD(ix, x); - - /* |x| ~< pi/4 */ - ix &= 0x7fffffff; - if (ix <= 0x3fe921fb) - return __kernel_cos(x, z); - - /* cos(Inf or NaN) is NaN */ - else if (ix >= 0x7ff00000) - return x - x; - - /* argument reduction needed */ - else { - n = __ieee754_rem_pio2(x, y); - switch (n & 3) { - case 0: - return __kernel_cos(y[0], y[1]); - case 1: - return -__kernel_sin(y[0], y[1], 1); - case 2: - return -__kernel_cos(y[0], y[1]); - default: - return __kernel_sin(y[0], y[1], 1); - } - } -} - -libm_hidden_def(cos) |