| #include "libm.h" |
| |
| #if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024 |
| long double tanl(long double x) |
| { |
| return tan(x); |
| } |
| #elif (LDBL_MANT_DIG == 64 || LDBL_MANT_DIG == 113) && LDBL_MAX_EXP == 16384 |
| long double tanl(long double x) |
| { |
| union ldshape u = {x}; |
| long double y[2]; |
| unsigned n; |
| |
| u.i.se &= 0x7fff; |
| if (u.i.se == 0x7fff) |
| return x - x; |
| if (u.f < M_PI_4) { |
| if (u.i.se < 0x3fff - LDBL_MANT_DIG/2) { |
| /* raise inexact if x!=0 and underflow if subnormal */ |
| FORCE_EVAL(u.i.se == 0 ? x*0x1p-120f : x+0x1p120f); |
| return x; |
| } |
| return __tanl(x, 0, 0); |
| } |
| n = __rem_pio2l(x, y); |
| return __tanl(y[0], y[1], n&1); |
| } |
| #endif |
