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GNU C Library master sources branch, master, updated. glibc-2.15-374-g7bd951f
- From: davem at sourceware dot org
- To: glibc-cvs at sourceware dot org
- Date: 14 Mar 2012 23:23:16 -0000
- Subject: GNU C Library master sources branch, master, updated. glibc-2.15-374-g7bd951f
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http://sources.redhat.com/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=7bd951ff59e0443ca1bdd5b0ea58f6f4f641ac73
commit 7bd951ff59e0443ca1bdd5b0ea58f6f4f641ac73
Author: David S. Miller <davem@davemloft.net>
Date: Wed Mar 14 16:21:40 2012 -0700
Small optimization to sparc 64-bit copysign.
* sysdeps/sparc/sparc64/fpu/s_copysign.S (__copysign): Use fzeros/fnegs
to load 0x80000000 into a float register instead of using the stack.
* sysdeps/sparc/sparc64/fpu/s_copysignf.S (__copysignf): Likewise.
diff --git a/ChangeLog b/ChangeLog
index 83d5d2b..4983816 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2012-03-14 David S. Miller <davem@davemloft.net>
+
+ * sysdeps/sparc/sparc64/fpu/s_copysign.S (__copysign): Use fzeros/fnegs
+ to load 0x80000000 into a float register instead of using the stack.
+ * sysdeps/sparc/sparc64/fpu/s_copysignf.S (__copysignf): Likewise.
+
2012-03-14 Joseph Myers <joseph@codesourcery.com>
* sysdeps/unix/sysv/linux/Makefile (sysdep_headers): Add
diff --git a/sysdeps/sparc/sparc64/fpu/s_copysign.S b/sysdeps/sparc/sparc64/fpu/s_copysign.S
index 571f57c..f7f69fb 100644
--- a/sysdeps/sparc/sparc64/fpu/s_copysign.S
+++ b/sysdeps/sparc/sparc64/fpu/s_copysign.S
@@ -20,9 +20,8 @@
#include <sysdep.h>
ENTRY (__copysign)
- sethi %hi(0x80000000), %g1
- st %g1, [%sp + STACK_BIAS + 128]
- ld [%sp + STACK_BIAS + 128], %f7
+ fzeros %f7
+ fnegs %f7, %f7
fands %f2, %f7, %f9
fandnot2s %f0, %f7, %f0
retl
diff --git a/sysdeps/sparc/sparc64/fpu/s_copysignf.S b/sysdeps/sparc/sparc64/fpu/s_copysignf.S
index db6a384..85577a7 100644
--- a/sysdeps/sparc/sparc64/fpu/s_copysignf.S
+++ b/sysdeps/sparc/sparc64/fpu/s_copysignf.S
@@ -20,9 +20,8 @@
#include <sysdep.h>
ENTRY (__copysignf)
- sethi %hi(0x80000000), %g1
- st %g1, [%sp + STACK_BIAS + 128]
- ld [%sp + STACK_BIAS + 128], %f7
+ fzeros %f7
+ fnegs %f7, %f7
fands %f3, %f7, %f9
fandnot2s %f1, %f7, %f1
retl
-----------------------------------------------------------------------
Summary of changes:
ChangeLog | 6 ++++++
sysdeps/sparc/sparc64/fpu/s_copysign.S | 5 ++---
sysdeps/sparc/sparc64/fpu/s_copysignf.S | 5 ++---
3 files changed, 10 insertions(+), 6 deletions(-)
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