From: David S. Miller <davem@davemloft.net>
Date: Wed, 14 Mar 2012 23:21:40 +0000 (-0700)
Subject: Small optimization to sparc 64-bit copysign.
X-Git-Tag: glibc-2.16-tps~808
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=7bd951ff59e0443ca1bdd5b0ea58f6f4f641ac73;p=platform%2Fupstream%2Fglibc.git

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