first commit of the new libm!

[musl] / src / math / __fpclassifyl.c

diff --git a/src/math/__fpclassifyl.c b/src/math/__fpclassifyl.c
index a4e354c..a5ad36f 100644 (file)
--- a/src/math/__fpclassifyl.c
+++ b/src/math/__fpclassifyl.c
@@ -1,16 +1,27 @@
-#include <stdint.h>
-#include <math.h>
+#include "libm.h"
 
-/* FIXME: move this to arch-specific file */
-int __fpclassifyl(long double __x)
+#if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
+
+#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;
+}
+#elif LDBL_MANT_DIG == 113 && LDBL_MAX_EXP == 16384
+int __fpclassifyl(long double x)
 {
-       union {
-               long double __ld;
-               __uint16_t __hw[5];
-               int64_t __m;
-       } __y = { __x };
-       int __ee = __y.__hw[4]&0x7fff;
-       if (!__ee) return __y.__m ? FP_SUBNORMAL : FP_ZERO;
-       if (__ee==0x7fff) return __y.__m ? FP_NAN : FP_INFINITE;
-       return __y.__m < 0 ? FP_NORMAL : FP_NAN;
+       union ldshape u = { x };
+       int e = u.bits.exp;
+       if (!e)
+               return u.bits.mlo | u.bits.mhi ? FP_SUBNORMAL : FP_ZERO;
+       if (e == 0x7fff)
+               return u.bits.mlo | u.bits.mhi ? FP_NAN : FP_INFINITE;
+       return FP_NORMAL;
 }
+#endif