61 lines
1.1 KiB
C
61 lines
1.1 KiB
C
#define _GNU_SOURCE
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#include "libc/math/libm.h"
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#if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
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void sincosl(long double x, long double *sin, long double *cos)
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{
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double sind, cosd;
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sincos(x, &sind, &cosd);
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*sin = sind;
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*cos = cosd;
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}
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#elif (LDBL_MANT_DIG == 64 || LDBL_MANT_DIG == 113) && LDBL_MAX_EXP == 16384
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void sincosl(long double x, long double *sin, long double *cos)
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{
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union ldshape u = {x};
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unsigned n;
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long double y[2], s, c;
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u.i.se &= 0x7fff;
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if (u.i.se == 0x7fff) {
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*sin = *cos = x - x;
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return;
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}
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if (u.f < M_PI_4) {
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if (u.i.se < 0x3fff - LDBL_MANT_DIG) {
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/* raise underflow if subnormal */
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if (u.i.se == 0) FORCE_EVAL(x*0x1p-120f);
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*sin = x;
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/* raise inexact if x!=0 */
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*cos = 1.0 + x;
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return;
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}
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*sin = __sinl(x, 0, 0);
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*cos = __cosl(x, 0);
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return;
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}
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n = __rem_pio2l(x, y);
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s = __sinl(y[0], y[1], 1);
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c = __cosl(y[0], y[1]);
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switch (n & 3) {
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case 0:
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*sin = s;
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*cos = c;
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break;
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case 1:
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*sin = c;
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*cos = -s;
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break;
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case 2:
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*sin = -s;
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*cos = -c;
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break;
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case 3:
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default:
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*sin = -c;
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*cos = s;
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break;
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}
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}
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#endif
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