win: math.h: isnan: use macro, similar to others (still broken)

It was broken due to tcc not able to compile asm with 't' constraint, and it's
still broken because fpclassify on which it now depends has the same issue. Next
commit will fix this.

1 files changed, 1 insertions, 32 deletions

diff --git a/win32/include/math.h b/win32/include/math.h
index 251d3f7..d923f17 100644
--- a/win32/include/math.h
+++ b/win32/include/math.h
@@ -333,38 +333,7 @@ extern "C" {
   /* 7.12.3.4 */
   /* We don't need to worry about trucation here:
   A NaN stays a NaN. */
-
-  __CRT_INLINE int __cdecl __isnan (double _x)
-  {
-    unsigned short sw;
-    __asm__ ("fxam;"
-      "fstsw %%ax": "=a" (sw) : "t" (_x));
-    return (sw & (FP_NAN | FP_NORMAL | FP_INFINITE | FP_ZERO | FP_SUBNORMAL))
-      == FP_NAN;
-  }
-
-  __CRT_INLINE int __cdecl __isnanf (float _x)
-  {
-    unsigned short sw;
-    __asm__ ("fxam;"
-      "fstsw %%ax": "=a" (sw) : "t" (_x));
-    return (sw & (FP_NAN | FP_NORMAL | FP_INFINITE | FP_ZERO | FP_SUBNORMAL))
-      == FP_NAN;
-  }
-
-  __CRT_INLINE int __cdecl __isnanl (long double _x)
-  {
-    unsigned short sw;
-    __asm__ ("fxam;"
-      "fstsw %%ax": "=a" (sw) : "t" (_x));
-    return (sw & (FP_NAN | FP_NORMAL | FP_INFINITE | FP_ZERO | FP_SUBNORMAL))
-      == FP_NAN;
-  }
-
-
-#define isnan(x) (sizeof (x) == sizeof (float) ? __isnanf (x)	\
-  : sizeof (x) == sizeof (double) ? __isnan (x)	\
-  : __isnanl (x))
+#define isnan(x) (fpclassify(x) == FP_NAN)
 
   /* 7.12.3.5 */
 #define isnormal(x) (fpclassify(x) == FP_NORMAL)