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#include "libm.h" #if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024 long double cosl(long double x) { return cos(x); } #elif (LDBL_MANT_DIG == 64 || LDBL_MANT_DIG == 113) && LDBL_MAX_EXP == 16384 long double cosl(long double x) { union ldshape u = {x}; unsigned n; long double y[2], hi, lo; u.i.se &= 0x7fff; if (u.i.se == 0x7fff) return x - x; x = u.f; if (x < M_PI_4) { if (u.i.se < 0x3fff - LDBL_MANT_DIG) /* raise inexact if x!=0 */ return 1.0 + x; return __cosl(x, 0); } n = __rem_pio2l(x, y); hi = y[0]; lo = y[1]; switch (n & 3) { case 0: return __cosl(hi, lo); case 1: return -__sinl(hi, lo, 1); case 2: return -__cosl(hi, lo); case 3: default: return __sinl(hi, lo, 1); } } #endif |