GNU C Library master sources branch master updated. glibc-2.25-660-g2572f35

[raji at sourceware dot org]

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http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=2572f356b18ddee03b331ba33f5a2ae65d031a59

commit 2572f356b18ddee03b331ba33f5a2ae65d031a59
Author: Rajalakshmi Srinivasaraghavan <raji@linux.vnet.ibm.com>
Date:   Mon Jul 3 10:46:13 2017 +0530

    powerpc: Clean up strlen and strnlen for power8
    
    To align a quadword aligned address to 64 bytes, maximum of three
    16 bytes load is needed for worst case instead of loading four times.

diff --git a/ChangeLog b/ChangeLog
index 4cd5d31..9697355 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2017-07-03  Rajalakshmi Srinivasaraghavan  <raji@linux.vnet.ibm.com>
+
+	* sysdeps/powerpc/powerpc64/power8/strlen.S: Remove unreachable code.
+	* sysdeps/powerpc/powerpc64/power8/strnlen.S: Likewise.
+
 2017-07-01  Florian Weimer  <fweimer@redhat.com>
 	    H.J. Lu  <hongjiu.lu@intel.com>
 
diff --git a/sysdeps/powerpc/powerpc64/power8/strlen.S b/sysdeps/powerpc/powerpc64/power8/strlen.S
index 8fdb6f5..5691d1d 100644
--- a/sysdeps/powerpc/powerpc64/power8/strlen.S
+++ b/sysdeps/powerpc/powerpc64/power8/strlen.S
@@ -144,17 +144,6 @@ L(align64):
 	or	r5,r10,r11
 	cmpdi	cr7,r5,0
 	addi	r9,r9,16
-	bne	cr7,L(dword_zero)
-
-	andi.	r10,r9,63
-	beq	cr0,L(preloop)
-	ld	r6,8(r4)
-	ldu	r5,16(r4)
-	cmpb	r10,r6,r0
-	cmpb	r11,r5,r0
-	or	r5,r10,r11
-	cmpdi	cr7,r5,0
-	addi	r9,r9,16
 
 	/* At this point, we are necessarily 64-byte aligned.  If no zeroes were
 	   found, jump to the vectorized loop.  */
diff --git a/sysdeps/powerpc/powerpc64/power8/strnlen.S b/sysdeps/powerpc/powerpc64/power8/strnlen.S
index 07608ff..6d669d4 100644
--- a/sysdeps/powerpc/powerpc64/power8/strnlen.S
+++ b/sysdeps/powerpc/powerpc64/power8/strnlen.S
@@ -141,15 +141,7 @@ ENTRY_TOCLESS (__strnlen)
 	addi    r4,r4,-16		/* Decrement maxlen in 16 bytes. */
 	bne     cr6,L(found_aligning64B) /* If found null bytes.  */
 
-	/* Unroll 3x above code block until aligned or find null bytes.  */
-	andi.   r7,r5,63
-	beq     cr0,L(preloop_64B)
-	lvx     v1,r5,r6
-	vcmpequb.      v1,v1,v0
-	addi    r5,r5,16
-	addi    r4,r4,-16
-	bne     cr6,L(found_aligning64B)
-
+	/* Unroll 2x above code block until aligned or find null bytes.  */
 	andi.   r7,r5,63
 	beq     cr0,L(preloop_64B)
 	lvx     v1,r5,r6

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

Summary of changes:
 ChangeLog                                  |    5 +++++
 sysdeps/powerpc/powerpc64/power8/strlen.S  |   11 -----------
 sysdeps/powerpc/powerpc64/power8/strnlen.S |   10 +---------
 3 files changed, 6 insertions(+), 20 deletions(-)


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