| #include "libm.h" |
| |
| #if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024 |
| int __fpclassifyl(long double x) |
| { |
| return __fpclassify(x); |
| } |
| #elif LDBL_MANT_DIG == 64 && LDBL_MAX_EXP == 16384 |
| int __fpclassifyl(long double x) |
| { |
| union ldshape u = {x}; |
| int e = u.i.se & 0x7fff; |
| int msb = u.i.m>>63; |
| if (!e && !msb) |
| return u.i.m ? FP_SUBNORMAL : FP_ZERO; |
| if (e == 0x7fff) { |
| /* The x86 variant of 80-bit extended precision only admits |
| * one representation of each infinity, with the mantissa msb |
| * necessarily set. The version with it clear is invalid/nan. |
| * The m68k variant, however, allows either, and tooling uses |
| * the version with it clear. */ |
| if (__BYTE_ORDER == __LITTLE_ENDIAN && !msb) |
| return FP_NAN; |
| return u.i.m << 1 ? FP_NAN : FP_INFINITE; |
| } |
| if (!msb) |
| return FP_NAN; |
| return FP_NORMAL; |
| } |
| #elif LDBL_MANT_DIG == 113 && LDBL_MAX_EXP == 16384 |
| int __fpclassifyl(long double x) |
| { |
| union ldshape u = {x}; |
| int e = u.i.se & 0x7fff; |
| u.i.se = 0; |
| if (!e) |
| return u.i2.lo | u.i2.hi ? FP_SUBNORMAL : FP_ZERO; |
| if (e == 0x7fff) |
| return u.i2.lo | u.i2.hi ? FP_NAN : FP_INFINITE; |
| return FP_NORMAL; |
| } |
| #endif |
