about summary refs log tree commit diff
path: root/sysdeps/ieee754
diff options
context:
space:
mode:
authorUlrich Drepper <drepper@gmail.com>2011-09-15 23:01:56 -0400
committerUlrich Drepper <drepper@gmail.com>2011-09-15 23:01:56 -0400
commit88738eb6e9e5a9d7d7977488519aaffb6263310c (patch)
tree52c4baa17e415c7044938178e2fde491f20f1d03 /sysdeps/ieee754
parent2840865d5abf3ecee3cfc6e1b03d0599aea674fd (diff)
downloadglibc-88738eb6e9e5a9d7d7977488519aaffb6263310c.tar.gz
glibc-88738eb6e9e5a9d7d7977488519aaffb6263310c.tar.xz
glibc-88738eb6e9e5a9d7d7977488519aaffb6263310c.zip
finite for 64-bit platforms
Diffstat (limited to 'sysdeps/ieee754')
-rw-r--r--sysdeps/ieee754/dbl-64/wordsize-64/s_finite.c32
1 files changed, 32 insertions, 0 deletions
diff --git a/sysdeps/ieee754/dbl-64/wordsize-64/s_finite.c b/sysdeps/ieee754/dbl-64/wordsize-64/s_finite.c
new file mode 100644
index 0000000000..585f63e571
--- /dev/null
+++ b/sysdeps/ieee754/dbl-64/wordsize-64/s_finite.c
@@ -0,0 +1,32 @@
+/*
+ * ====================================================
+ * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
+ *
+ * Developed at SunPro, a Sun Microsystems, Inc. business.
+ * Permission to use, copy, modify, and distribute this
+ * software is freely granted, provided that this notice
+ * is preserved.
+ * ====================================================
+ */
+
+/*
+ * finite(x) returns 1 is x is finite, else 0;
+ * no branching!
+ */
+
+#include "math.h"
+#include "math_private.h"
+
+int
+__finite(double x)
+{
+  int64_t lx;
+  EXTRACT_WORDS64(lx,x);
+  return (int)((uint64_t)((lx&INT64_C(0x7fffffffffffffff))-INT64_C(0x7ff0000000000000))>>63);
+}
+hidden_def (__finite)
+weak_alias (__finite, finite)
+#ifdef NO_LONG_DOUBLE
+strong_alias (__finite, __finitel)
+weak_alias (__finite, finitel)
+#endif