diff options
Diffstat (limited to 'sysdeps/ieee754/ldbl-128ibm/s_sinl.c')
| -rw-r--r-- | sysdeps/ieee754/ldbl-128ibm/s_sinl.c | 84 |
1 files changed, 0 insertions, 84 deletions
diff --git a/sysdeps/ieee754/ldbl-128ibm/s_sinl.c b/sysdeps/ieee754/ldbl-128ibm/s_sinl.c deleted file mode 100644 index 8cc592c612..0000000000 --- a/sysdeps/ieee754/ldbl-128ibm/s_sinl.c +++ /dev/null @@ -1,84 +0,0 @@ -/* s_sinl.c -- long double version of s_sin.c. - * Conversion to long double by Jakub Jelinek, jj@ultra.linux.cz. - */ - -/* - * ==================================================== - * 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. - * ==================================================== - */ - -/* sinl(x) - * Return sine function of x. - * - * kernel function: - * __kernel_sinl ... sine function on [-pi/4,pi/4] - * __kernel_cosl ... cose function on [-pi/4,pi/4] - * __ieee754_rem_pio2l ... 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.h" -#include "math_private.h" -#include <math_ldbl_opt.h> - -#ifdef __STDC__ - long double __sinl(long double x) -#else - long double __sinl(x) - long double x; -#endif -{ - long double y[2],z=0.0L; - int64_t n, ix; - - /* High word of x. */ - GET_LDOUBLE_MSW64(ix,x); - - /* |x| ~< pi/4 */ - ix &= 0x7fffffffffffffffLL; - if(ix <= 0x3fe921fb54442d10LL) - return __kernel_sinl(x,z,0); - - /* sin(Inf or NaN) is NaN */ - else if (ix>=0x7ff0000000000000LL) return x-x; - - /* argument reduction needed */ - else { - n = __ieee754_rem_pio2l(x,y); - switch(n&3) { - case 0: return __kernel_sinl(y[0],y[1],1); - case 1: return __kernel_cosl(y[0],y[1]); - case 2: return -__kernel_sinl(y[0],y[1],1); - default: - return -__kernel_cosl(y[0],y[1]); - } - } -} -long_double_symbol (libm, __sinl, sinl); |