long double sinhl(long double x) { long double hi,lo,x2,x4; double dx2,s; int16_t ix,jx; GET_LDBL_EXPSIGN(jx,x); ix = jx&0x7fff; /* x is INF or NaN */ if(ix>=0x7fff) return x+x; ENTERI(); s = 1; if (jx<0) s = -1; /* |x| < 64, return x, s(x), or accurate s*(exp(|x|)/2-1/exp(|x|)/2) */ if (ix<0x4005) { /* |x|<64 */ if (ix<BIAS-(LDBL_MANT_DIG+1)/2) /* |x|<TINY */ if(shuge+x>1) RETURNI(x); /* sinh(tiny) = tiny with inexact */ if (ix<0x3fff) { /* |x|<1 */ x2 = x*x; #if LDBL_MANT_DIG == 64 x4 = x2*x2; RETURNI(((S17*x2 + S15)*x4 + (S13*x2 + S11))*(x2*x*x4*x4) + ((S9*x2 + S7)*x2 + S5)*(x2*x*x2) + S3*(x2*x) + x); #elif LDBL_MANT_DIG == 113 dx2 = x2; RETURNI(((((((((((S25*dx2 + S23)*dx2 + S21)*x2 + S19)*x2 + S17)*x2 + S15)*x2 + S13)*x2 + S11)*x2 + S9)*x2 + S7)*x2 + S5)* (x2*x*x2) + S3*(x2*x) + x); #endif } k_hexpl(fabsl(x), &hi, &lo); RETURNI(s*(lo - 0.25/(hi + lo) + hi)); } /* |x| in [64, o_threshold], return correctly-overflowing s*exp(|x|)/2 */ if (fabsl(x) <= o_threshold) RETURNI(s*hexpl(fabsl(x))); /* |x| > o_threshold, sinh(x) overflow */ return x*shuge; }
long double coshl(long double x) { long double hi,lo,x2,x4; #if LDBL_MANT_DIG == 113 double dx2; #endif uint16_t ix; GET_LDBL_EXPSIGN(ix,x); ix &= 0x7fff; /* x is INF or NaN */ if(ix>=0x7fff) return x*x; ENTERI(); /* |x| < 1, return 1 or c(x) */ if(ix<0x3fff) { if (ix<BIAS-(LDBL_MANT_DIG+1)/2) /* |x| < TINY */ RETURNI(1+tiny); /* cosh(tiny) = 1(+) with inexact */ x2 = x*x; #if LDBL_MANT_DIG == 64 x4 = x2*x2; RETURNI(((C16*x2 + C14)*x4 + (C12*x2 + C10))*(x4*x4*x2) + ((C8*x2 + C6)*x2 + C4)*x4 + C2*x2 + 1); #elif LDBL_MANT_DIG == 113 dx2 = x2; RETURNI((((((((((((C26*dx2 + C24)*dx2 + C22)*dx2 + C20)*x2 + C18)*x2 + C16)*x2 + C14)*x2 + C12)*x2 + C10)*x2 + C8)*x2 + C6)*x2 + C4)*(x2*x2) + C2*x2 + 1); #endif } /* |x| in [1, 64), return accurate exp(|x|)/2+1/exp(|x|)/2 */ if (ix < 0x4005) { k_hexpl(fabsl(x), &hi, &lo); RETURNI(lo + 0.25/(hi + lo) + hi); } /* |x| in [64, o_threshold], return correctly-overflowing exp(|x|)/2 */ if (fabsl(x) <= o_threshold) RETURNI(hexpl(fabsl(x))); /* |x| > o_threshold, cosh(x) overflow */ RETURNI(huge*huge); }
long double tanhl(long double x) { long double hi,lo,s,x2,x4,z; double dx2; int16_t jx,ix; GET_LDBL_EXPSIGN(jx,x); ix = jx&0x7fff; /* x is INF or NaN */ if(ix>=0x7fff) { if (jx>=0) return one/x+one; /* tanh(+-inf)=+-1 */ else return one/x-one; /* tanh(NaN) = NaN */ } ENTERI(); /* |x| < 40 */ if (ix < 0x4004 || fabsl(x) < 40) { /* |x|<40 */ if (__predict_false(ix<BIAS-(LDBL_MANT_DIG+1)/2)) { /* |x|<TINY */ /* tanh(+-0) = +0; tanh(tiny) = tiny(-+) with inexact: */ return (x == 0 ? x : (0x1p200 * x - x) * 0x1p-200); } if (ix<0x3ffd) { /* |x|<0.25 */ x2 = x*x; #if LDBL_MANT_DIG == 64 x4 = x2*x2; RETURNI(((T19*x2 + T17)*x4 + (T15*x2 + T13))*(x2*x*x2*x4*x4) + ((T11*x2 + T9)*x4 + (T7*x2 + T5))*(x2*x*x2) + T3*(x2*x) + x); #elif LDBL_MANT_DIG == 113 dx2 = x2; #if 0 RETURNI(((((((((((((((T33*dx2 + T31)*dx2 + T29)*dx2 + T27)*dx2 + T25)*x2 + T23)*x2 + T21)*x2 + T19)*x2 + T17)*x2 + T15)*x2 + T13)*x2 + T11)*x2 + T9)*x2 + T7)*x2 + T5)* (x2*x*x2) + T3*(x2*x) + x); #else long double q = ((((((((((((((T33*dx2 + T31)*dx2 + T29)*dx2 + T27)*dx2 + T25)*x2 + T23)*x2 + T21)*x2 + T19)*x2 + T17)*x2 + T15)*x2 + T13)*x2 + T11)*x2 + T9)*x2 + T7)*x2 + T5)* (x2*x*x2); RETURNI(q + T3*(x2*x) + x); #endif #endif } k_hexpl(2*fabsl(x), &hi, &lo); if (ix<0x4001 && fabsl(x) < 1.5) /* |x|<1.5 */ z = divl(hi, lo, -0.5, hi, lo, 0.5); else z = one - one/(lo+0.5+hi); /* |x| >= 40, return +-1 */ } else { z = one - tiny; /* raise inexact flag */ } s = 1; if (jx<0) s = -1; RETURNI(s*z); }