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GNU C Library master sources branch, master, updated. glibc-2.14-415-g774a266
- From: drepper at sourceware dot org
- To: glibc-cvs at sourceware dot org
- Date: 23 Oct 2011 17:32:09 -0000
- Subject: GNU C Library master sources branch, master, updated. glibc-2.14-415-g774a266
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http://sources.redhat.com/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=774a2669af652979ed965d7225502ba473b2da73
commit 774a2669af652979ed965d7225502ba473b2da73
Author: Ulrich Drepper <drepper@gmail.com>
Date: Sun Oct 23 13:31:01 2011 -0400
Clean up FMA use
The macro's name should reflect that subtraction is being done. And
use __builtin_fma, it seems to work after all.
diff --git a/sysdeps/ieee754/dbl-64/dla.h b/sysdeps/ieee754/dbl-64/dla.h
index af202ad..cb12dbc 100644
--- a/sysdeps/ieee754/dbl-64/dla.h
+++ b/sysdeps/ieee754/dbl-64/dla.h
@@ -60,9 +60,9 @@
/* satisfies z+zz = x*y exactly. p,hx,tx,hy,ty are temporary */
/* storage variables of type double. */
-#ifdef DLA_FMA
+#ifdef DLA_FMS
# define EMULV(x,y,z,zz,p,hx,tx,hy,ty) \
- z=x*y; zz=DLA_FMA(x,y,z);
+ z=x*y; zz=DLA_FMS(x,y,z);
#else
# define EMULV(x,y,z,zz,p,hx,tx,hy,ty) \
p=CN*(x); hx=((x)-p)+p; tx=(x)-hx; \
@@ -76,7 +76,7 @@
/* that satisfies z+zz = x*y exactly. p,hx,tx,hy,ty,q are temporary */
/* storage variables of type double. */
-#ifdef DLA_FMA
+#ifdef DLA_FMS
# define MUL12(x,y,z,zz,p,hx,tx,hy,ty,q) \
EMULV(x,y,z,zz,p,hx,tx,hy,ty)
#else
diff --git a/sysdeps/x86_64/dla.h b/sysdeps/x86_64/dla.h
index bb6c8c4..7aa06e5 100644
--- a/sysdeps/x86_64/dla.h
+++ b/sysdeps/x86_64/dla.h
@@ -1,9 +1,6 @@
-#ifdef __FMA4__
-# define DLA_FMA(x,y,z) \
- ({ double __zz; \
- asm ("vfmsubsd %3, %2, %1, %0" \
- : "=x" (__zz) : "x" (x), "xm" (y), "x" (z)); \
- __zz; })
+#if defined __FMA4__ || defined __FMA__
+# define DLA_FMS(x,y,z) \
+ __builtin_fma (x, y, -z)
#endif
#include "sysdeps/ieee754/dbl-64/dla.h"
-----------------------------------------------------------------------
Summary of changes:
sysdeps/ieee754/dbl-64/dla.h | 6 +++---
sysdeps/x86_64/dla.h | 9 +++------
2 files changed, 6 insertions(+), 9 deletions(-)
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