#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.bits.exp;
- if (!e)
- return u.bits.m ? FP_SUBNORMAL : FP_ZERO;
- if (e == 0x7fff)
- return u.bits.m & (uint64_t)-1>>1 ? FP_NAN : FP_INFINITE;
- return u.bits.m & (uint64_t)1<<63 ? FP_NORMAL : FP_NAN;
+ 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.bits.exp;
+ union ldshape u = {x};
+ int e = u.i.se & 0x7fff;
+ u.i.se = 0;
if (!e)
- return u.bits.mlo | u.bits.mhi ? FP_SUBNORMAL : FP_ZERO;
+ return u.i2.lo | u.i2.hi ? FP_SUBNORMAL : FP_ZERO;
if (e == 0x7fff)
- return u.bits.mlo | u.bits.mhi ? FP_NAN : FP_INFINITE;
+ return u.i2.lo | u.i2.hi ? FP_NAN : FP_INFINITE;
return FP_NORMAL;
}
#endif