| #include "libm.h" |
| |
| #if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024 |
| long double roundl(long double x) |
| { |
| return round(x); |
| } |
| #elif (LDBL_MANT_DIG == 64 || LDBL_MANT_DIG == 113) && LDBL_MAX_EXP == 16384 |
| |
| static const long double toint = 1/LDBL_EPSILON; |
| |
| long double roundl(long double x) |
| { |
| union ldshape u = {x}; |
| int e = u.i.se & 0x7fff; |
| long double y; |
| |
| if (e >= 0x3fff+LDBL_MANT_DIG-1) |
| return x; |
| if (u.i.se >> 15) |
| x = -x; |
| if (e < 0x3fff-1) { |
| FORCE_EVAL(x + toint); |
| return 0*u.f; |
| } |
| y = x + toint - toint - x; |
| if (y > 0.5) |
| y = y + x - 1; |
| else if (y <= -0.5) |
| y = y + x + 1; |
| else |
| y = y + x; |
| if (u.i.se >> 15) |
| y = -y; |
| return y; |
| } |
| #endif |
