Restore math-macros.h.

Author: lntue

libc/include/llvm-libc-macros/math-macros.h

@@ -35,12 +35,12 @@
 #define INFINITY __builtin_inf()
 #define NAN __builtin_nanf("")
 
-#define FP_ILOGB0 INT_MIN
-#define FP_LLOGB0 LONG_MIN
+#define FP_ILOGB0 (-INT_MAX - 1)
+#define FP_LLOGB0 (-LONG_MAX - 1)
 
 #ifdef __FP_LOGBNAN_MIN
-#define FP_ILOGBNAN INT_MIN
-#define FP_LLOGBNAN LONG_MIN
+#define FP_ILOGBNAN (-INT_MAX - 1)
+#define FP_LLOGBNAN (-LONG_MAX - 1)
 #else
 #define FP_ILOGBNAN INT_MAX
 #define FP_LLOGBNAN LONG_MAX