Use C99-defined signbit macro

1 files changed, 0 insertions, 19 deletions

diff --git a/missing/signbit.c b/missing/signbit.c
deleted file mode 100644
index 2f7ce8c601..0000000000
--- a/missing/signbit.c
+++ /dev/null
@@ -1,19 +0,0 @@
-#include <limits.h>
-#include "ruby.h"
-
-int
-signbit(double x)
-{
-    enum {double_per_long = sizeof(double) / sizeof(long)};
-    enum {long_msb = sizeof(long) * CHAR_BIT - 1};
-    union {double d; unsigned long i[double_per_long];} u;
-    unsigned long l;
-
-    u.d = x;
-#ifdef WORDS_BIGENDIAN
-    l = u.i[0];
-#else
-    l = u.i[double_per_long - 1];
-#endif
-    return (int)(l >> long_msb);
-}