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GNU C Library master sources branch, master, updated. glibc-2.14-437-ga0cf1ed
- From: drepper at sourceware dot org
- To: glibc-cvs at sourceware dot org
- Date: 25 Oct 2011 01:17:42 -0000
- Subject: GNU C Library master sources branch, master, updated. glibc-2.14-437-ga0cf1ed
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http://sources.redhat.com/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=a0cf1edd4cf2b3bf1ec2f772b47c8eaafd899383
commit a0cf1edd4cf2b3bf1ec2f772b47c8eaafd899383
Author: Ulrich Drepper <drepper@gmail.com>
Date: Mon Oct 24 21:17:10 2011 -0400
Use inline asm for DLA_FMS because of broken old compilers
diff --git a/ChangeLog b/ChangeLog
index a2e155a..108d9a9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,8 @@
2011-10-24 Ulrich Drepper <drepper@gmail.com>
+ * sysdeps/x86_64/dla.h (DLA_FMS): Some compilers fail to inline
+ __builtin_fma in some situations. Have to use an asm.
+
* config.make.in: Add have-mfma4 entry.
* configure.in: Substitute libc_cv_cc_fma4.
* math/Makefile (dbl-only-routines): Add sincostab.
diff --git a/sysdeps/x86_64/dla.h b/sysdeps/x86_64/dla.h
index 7aa06e5..6fe8f74 100644
--- a/sysdeps/x86_64/dla.h
+++ b/sysdeps/x86_64/dla.h
@@ -1,6 +1,10 @@
-#if defined __FMA4__ || defined __FMA__
+#ifdef __FMA4__
# define DLA_FMS(x,y,z) \
- __builtin_fma (x, y, -z)
+ ({ double __z; \
+ asm ("vfmsubsd %3, %2, %1, %0" \
+ : "=x" (__z) \
+ : "x" ((double) (x)), "xm" ((double) (y)) , "x" ((double) (z))); \
+ __z; })
#endif
#include "sysdeps/ieee754/dbl-64/dla.h"
-----------------------------------------------------------------------
Summary of changes:
ChangeLog | 3 +++
sysdeps/x86_64/dla.h | 8 ++++++--
2 files changed, 9 insertions(+), 2 deletions(-)
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