42 lines
820 B
C
42 lines
820 B
C
#include "libc/math/libm.h"
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#if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
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long double sinl(long double x)
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{
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return sin(x);
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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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long double sinl(long double x)
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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], hi, lo;
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u.i.se &= 0x7fff;
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if (u.i.se == 0x7fff)
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return x - x;
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if (u.f < M_PI_4) {
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if (u.i.se < 0x3fff - LDBL_MANT_DIG/2) {
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/* raise inexact if x!=0 and underflow if subnormal */
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FORCE_EVAL(u.i.se == 0 ? x*0x1p-120f : x+0x1p120f);
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return x;
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}
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return __sinl(x, 0.0, 0);
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}
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n = __rem_pio2l(x, y);
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hi = y[0];
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lo = y[1];
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switch (n & 3) {
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case 0:
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return __sinl(hi, lo, 1);
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case 1:
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return __cosl(hi, lo);
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case 2:
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return -__sinl(hi, lo, 1);
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case 3:
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default:
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return -__cosl(hi, lo);
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}
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}
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#endif
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