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GNU C Library master sources branch, master, updated. glibc-2.10-312-g2df4be8
- From: drepper at sourceware dot org
- To: glibc-cvs at sourceware dot org
- Date: 26 Aug 2009 07:52:06 -0000
- Subject: GNU C Library master sources branch, master, updated. glibc-2.10-312-g2df4be8
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http://sources.redhat.com/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=2df4be8c3545f6158e468660a73f794573fb6f07
commit 2df4be8c3545f6158e468660a73f794573fb6f07
Author: Ulrich Drepper <drepper@redhat.com>
Date: Wed Aug 26 00:51:45 2009 -0700
Add isinf optimized for 64-bit.
diff --git a/ChangeLog b/ChangeLog
index c28272c..18a5b5d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,7 @@
2009-08-26 Ulrich Drepper <drepper@redhat.com>
+ * sysdeps/ieee754/dbl-64/wordsize-64/s_isinf.c: New file.
+
* sysdeps/ieee754/dbl-64/wordsize-64/s_isnan.c: New file.
2009-08-25 Ulrich Drepper <drepper@redhat.com>
diff --git a/sysdeps/ieee754/dbl-64/wordsize-64/s_isinf.c b/sysdeps/ieee754/dbl-64/wordsize-64/s_isinf.c
new file mode 100644
index 0000000..c48e979
--- /dev/null
+++ b/sysdeps/ieee754/dbl-64/wordsize-64/s_isinf.c
@@ -0,0 +1,30 @@
+/*
+ * Written by J.T. Conklin <jtc@netbsd.org>.
+ * Changed to return -1 for -Inf by Ulrich Drepper <drepper@cygnus.com>.
+ * Public domain.
+ */
+
+/*
+ * isinf(x) returns 1 is x is inf, -1 if x is -inf, else 0;
+ * no branching!
+ */
+
+#include "math.h"
+#include "math_private.h"
+
+int
+__isinf (double x)
+{
+ int64_t ix;
+ EXTRACT_WORDS64(ix,x);
+ int64_t t = ix & UINT64_C(0x7fffffffffffffff);
+ t ^= UINT64_C(0x7ff0000000000000);
+ t |= -t;
+ return ~(t >> 63) & (ix >> 62);
+}
+hidden_def (__isinf)
+weak_alias (__isinf, isinf)
+#ifdef NO_LONG_DOUBLE
+strong_alias (__isinf, __isinfl)
+weak_alias (__isinf, isinfl)
+#endif
-----------------------------------------------------------------------
Summary of changes:
ChangeLog | 2 ++
sysdeps/ieee754/dbl-64/{ => wordsize-64}/s_isinf.c | 15 ++++++---------
2 files changed, 8 insertions(+), 9 deletions(-)
copy sysdeps/ieee754/dbl-64/{ => wordsize-64}/s_isinf.c (63%)
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