Nowadays, we have these type-generic builtins always available.
2018-10-02 Uros Bizjak <ubiz...@gmail.com>
* libgcc2.c (isnan): Use __builtin_isnan.
(isfinite): Use __builtin_isfinite.
(isinf): Use __builtin_isinf.
Bootstrapped and regression tested on x86_64-linux-gnu {,-m32}.
OK for mainline?
Uros.
diff --git a/libgcc/libgcc2.c b/libgcc/libgcc2.c
index f418f3a354de..8ac2025f7af6 100644
--- a/libgcc/libgcc2.c
+++ b/libgcc/libgcc2.c
@@ -1939,15 +1939,9 @@ NAME (TYPE x, int m)
#define CONCAT2(A,B) _CONCAT2(A,B)
#define _CONCAT2(A,B) A##B
-/* All of these would be present in a full C99 implementation of <math.h>
- and <complex.h>. Our problem is that only a few systems have such full
- implementations. Further, libgcc_s.so isn't currently linked against
- libm.so, and even for systems that do provide full C99, the extra overhead
- of all programs using libgcc having to link against libm. So avoid it. */
-
-#define isnan(x) __builtin_expect ((x) != (x), 0)
-#define isfinite(x) __builtin_expect (!isnan((x) - (x)), 1)
-#define isinf(x) __builtin_expect (!isnan(x) & !isfinite(x), 0)
+#define isnan(x) __builtin_isnan (x)
+#define isfinite(x) __builtin_isfinite (x)
+#define isinf(x) __builtin_isinf (x)
#define INFINITY CONCAT2(__builtin_huge_val, CEXT) ()
#define I 1i
