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GNU C Library master sources branch, master, updated. glibc-2.13-85-g4420675

From: drepper at sourceware dot org
To: glibc-cvs at sourceware dot org
Date: 18 Apr 2011 02:04:17 -0000
Subject: GNU C Library master sources branch, master, updated. glibc-2.13-85-g4420675
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The branch, master has been updated
       via  4420675c9d361643d1179ad67e0bb35c8fbdd1ce (commit)
      from  75ea32abcde4e1699328354e1804ea94560d2950 (commit)

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- Log -----------------------------------------------------------------
http://sources.redhat.com/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=4420675c9d361643d1179ad67e0bb35c8fbdd1ce

commit 4420675c9d361643d1179ad67e0bb35c8fbdd1ce
Author: Andreas Schwab <schwab@linux-m68k.org>
Date:   Sun Apr 17 22:03:53 2011 -0400

    Fix POWER4/POWER7 optimized strncmp to not read past differing bytes

diff --git a/ChangeLog b/ChangeLog
index d53eff3..71a7364 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2011-03-28  Andreas Schwab  <schwab@linux-m68k.org>
+
+	* sysdeps/powerpc/powerpc32/power4/strncmp.S: Don't read past
+	differing bytes.
+	* sysdeps/powerpc/powerpc64/power4/strncmp.S: Likewise.
+	* sysdeps/powerpc/powerpc32/power7/strncmp.S: Likewise.
+	* sysdeps/powerpc/powerpc64/power7/strncmp.S: Likewise.
+
 2011-04-17  Ulrich Drepper  <drepper@gmail.com>
 
 	[BZ #12420]
diff --git a/sysdeps/powerpc/powerpc32/power4/strncmp.S b/sysdeps/powerpc/powerpc32/power4/strncmp.S
index fc0835e..f5d47af 100644
--- a/sysdeps/powerpc/powerpc32/power4/strncmp.S
+++ b/sysdeps/powerpc/powerpc32/power4/strncmp.S
@@ -1,5 +1,5 @@
 /* Optimized strcmp implementation for PowerPC32.
-   Copyright (C) 2003, 2006 Free Software Foundation, Inc.
+   Copyright (C) 2003, 2006, 2011 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -139,30 +139,31 @@ L(u1):
 	bdz	L(u4)
 	cmpw	rWORD1, rWORD2
 	beq-	cr1, L(u4)
+	bne-	L(u4)
 	lbzu    rWORD3, 1(rSTR1)
 	lbzu	rWORD4, 1(rSTR2)
-	bne-	L(u4)
 	cmpwi	cr1, rWORD3, 0
 	bdz	L(u3)
 	cmpw	rWORD3, rWORD4
 	beq-    cr1, L(u3)
+	bne-    L(u3)
 	lbzu	rWORD1, 1(rSTR1)
 	lbzu	rWORD2, 1(rSTR2)
-	bne-    L(u3)
 	cmpwi	cr1, rWORD1, 0
 	bdz	L(u4)
 	cmpw	rWORD1, rWORD2
 	beq-	cr1, L(u4)
+	bne-	L(u4)
 	lbzu	rWORD3, 1(rSTR1)
 	lbzu	rWORD4, 1(rSTR2)
-	bne-	L(u4)
 	cmpwi	cr1, rWORD3, 0
 	bdz	L(u3)
 	cmpw	rWORD3, rWORD4
 	beq-    cr1, L(u3)
+	bne-	L(u3)
 	lbzu	rWORD1, 1(rSTR1)
 	lbzu	rWORD2, 1(rSTR2)
-	beq+    L(u1)
+	b       L(u1)
 
 L(u3):  sub     rRTN, rWORD3, rWORD4
         blr
diff --git a/sysdeps/powerpc/powerpc32/power7/strncmp.S b/sysdeps/powerpc/powerpc32/power7/strncmp.S
index ba72d0a..7ee9e03 100644
--- a/sysdeps/powerpc/powerpc32/power7/strncmp.S
+++ b/sysdeps/powerpc/powerpc32/power7/strncmp.S
@@ -1,5 +1,5 @@
 /* Optimized strcmp implementation for POWER7/PowerPC32.
-   Copyright (C) 2010 Free Software Foundation, Inc.
+   Copyright (C) 2010, 2011 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -141,30 +141,31 @@ L(u1):
 	bdz	L(u4)
 	cmpw	rWORD1,rWORD2
 	beq	cr1,L(u4)
+	bne	L(u4)
 	lbzu	rWORD3,1(rSTR1)
 	lbzu	rWORD4,1(rSTR2)
-	bne	L(u4)
 	cmpwi	cr1,rWORD3,0
 	bdz	L(u3)
 	cmpw	rWORD3,rWORD4
 	beq	cr1,L(u3)
+	bne	L(u3)
 	lbzu	rWORD1,1(rSTR1)
 	lbzu	rWORD2,1(rSTR2)
-	bne	L(u3)
 	cmpwi	cr1,rWORD1,0
 	bdz	L(u4)
 	cmpw	rWORD1,rWORD2
 	beq	cr1,L(u4)
+	bne	L(u4)
 	lbzu	rWORD3,1(rSTR1)
 	lbzu	rWORD4,1(rSTR2)
-	bne	L(u4)
 	cmpwi	cr1,rWORD3,0
 	bdz	L(u3)
 	cmpw	rWORD3,rWORD4
 	beq	cr1,L(u3)
+	bne	L(u3)
 	lbzu	rWORD1,1(rSTR1)
 	lbzu	rWORD2,1(rSTR2)
-	beq	L(u1)
+	b	L(u1)
 
 L(u3):  sub	rRTN,rWORD3,rWORD4
 	blr
diff --git a/sysdeps/powerpc/powerpc64/power4/strncmp.S b/sysdeps/powerpc/powerpc64/power4/strncmp.S
index 7a1665d..94ae85b 100644
--- a/sysdeps/powerpc/powerpc64/power4/strncmp.S
+++ b/sysdeps/powerpc/powerpc64/power4/strncmp.S
@@ -1,5 +1,5 @@
 /* Optimized strcmp implementation for PowerPC64.
-   Copyright (C) 2003, 2006 Free Software Foundation, Inc.
+   Copyright (C) 2003, 2006, 2011 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -143,30 +143,31 @@ L(u1):
 	bdz	L(u4)
 	cmpd	rWORD1, rWORD2
 	beq-	cr1, L(u4)
+	bne-	L(u4)
 	lbzu    rWORD3, 1(rSTR1)
 	lbzu	rWORD4, 1(rSTR2)
-	bne-	L(u4)
 	cmpdi	cr1, rWORD3, 0
 	bdz	L(u3)
 	cmpd	rWORD3, rWORD4
 	beq-    cr1, L(u3)
+	bne-    L(u3)
 	lbzu	rWORD1, 1(rSTR1)
 	lbzu	rWORD2, 1(rSTR2)
-	bne-    L(u3)
 	cmpdi	cr1, rWORD1, 0
 	bdz	L(u4)
 	cmpd	rWORD1, rWORD2
 	beq-	cr1, L(u4)
+	bne-	L(u4)
 	lbzu	rWORD3, 1(rSTR1)
 	lbzu	rWORD4, 1(rSTR2)
-	bne-	L(u4)
 	cmpdi	cr1, rWORD3, 0
 	bdz	L(u3)
 	cmpd	rWORD3, rWORD4
 	beq-    cr1, L(u3)
+	bne-    L(u3)
 	lbzu	rWORD1, 1(rSTR1)
 	lbzu	rWORD2, 1(rSTR2)
-	beq+    L(u1)
+	b       L(u1)
 
 L(u3):  sub     rRTN, rWORD3, rWORD4
         blr
diff --git a/sysdeps/powerpc/powerpc64/power7/strncmp.S b/sysdeps/powerpc/powerpc64/power7/strncmp.S
index 34f1e52..5ee5e2e 100644
--- a/sysdeps/powerpc/powerpc64/power7/strncmp.S
+++ b/sysdeps/powerpc/powerpc64/power7/strncmp.S
@@ -1,5 +1,5 @@
 /* Optimized strcmp implementation for POWER7/PowerPC64.
-   Copyright (C) 2010 Free Software Foundation, Inc.
+   Copyright (C) 2010, 2011 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -145,30 +145,31 @@ L(u1):
 	bdz	L(u4)
 	cmpd	rWORD1,rWORD2
 	beq	cr1,L(u4)
+	bne	L(u4)
 	lbzu	rWORD3,1(rSTR1)
 	lbzu	rWORD4,1(rSTR2)
-	bne	L(u4)
 	cmpdi	cr1,rWORD3,0
 	bdz	L(u3)
 	cmpd	rWORD3,rWORD4
 	beq	cr1,L(u3)
+	bne	L(u3)
 	lbzu	rWORD1,1(rSTR1)
 	lbzu	rWORD2,1(rSTR2)
-	bne	L(u3)
 	cmpdi	cr1,rWORD1,0
 	bdz	L(u4)
 	cmpd	rWORD1,rWORD2
 	beq	cr1,L(u4)
+	bne	L(u4)
 	lbzu	rWORD3,1(rSTR1)
 	lbzu	rWORD4,1(rSTR2)
-	bne	L(u4)
 	cmpdi	cr1,rWORD3,0
 	bdz	L(u3)
 	cmpd	rWORD3,rWORD4
 	beq	cr1,L(u3)
+	bne	L(u3)
 	lbzu	rWORD1,1(rSTR1)
 	lbzu	rWORD2,1(rSTR2)
-	beq	L(u1)
+	b	L(u1)
 
 L(u3):  sub	rRTN,rWORD3,rWORD4
 	blr

-----------------------------------------------------------------------

Summary of changes:
 ChangeLog                                  |    8 ++++++++
 sysdeps/powerpc/powerpc32/power4/strncmp.S |   11 ++++++-----
 sysdeps/powerpc/powerpc32/power7/strncmp.S |   11 ++++++-----
 sysdeps/powerpc/powerpc64/power4/strncmp.S |   11 ++++++-----
 sysdeps/powerpc/powerpc64/power7/strncmp.S |   11 ++++++-----
 5 files changed, 32 insertions(+), 20 deletions(-)


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