GNU C Library master sources branch hjl/erms/hybrid updated. glibc-2.23-135-gc86b60d

[hjl at sourceware dot org]

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       via  503faea731766f6337f1a8277c8d3d0938d25a0c (commit)
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http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=c86b60d8365a7200802f5bf6903a7cc3ab6084e1

commit c86b60d8365a7200802f5bf6903a7cc3ab6084e1
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Sun Mar 27 08:50:32 2016 -0700

    Avoid long nop in memmove-vec-unaligned-erms.S

diff --git a/sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S b/sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S
index 3439a9c..385f2c2 100644
--- a/sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S
+++ b/sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S
@@ -178,7 +178,8 @@ L(movsb):
 	.p2align 4
 L(movsb_more_2x_vec):
 	cmpq	$REP_MOVSB_THRESHOLD, %rdx
-	ja	L(movsb)
+	/* Force 32-bit displacement to avoid long nop.  */
+	ja.d32	L(movsb)
 	.p2align 4
 L(more_2x_vec):
 	/* More than 2 * VEC.  */

http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=503faea731766f6337f1a8277c8d3d0938d25a0c

commit 503faea731766f6337f1a8277c8d3d0938d25a0c
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Sun Mar 27 08:45:23 2016 -0700

    Avoid long nop in memset-vec-unaligned-erms.S

diff --git a/sysdeps/x86_64/multiarch/memset-vec-unaligned-erms.S b/sysdeps/x86_64/multiarch/memset-vec-unaligned-erms.S
index 1b596ce..e746cbb 100644
--- a/sysdeps/x86_64/multiarch/memset-vec-unaligned-erms.S
+++ b/sysdeps/x86_64/multiarch/memset-vec-unaligned-erms.S
@@ -122,7 +122,8 @@ ENTRY (MEMSET_SYMBOL (__memset, unaligned_erms))
 	.p2align 4
 L(stosb_more_2x_vec):
 	cmpq	$REP_STOSB_THRESHOLD, %rdx
-	ja	L(stosb)
+	/* Force 32-bit displacement to avoid long nop.  */
+	ja.d32	L(stosb)
 	.p2align 4
 L(more_2x_vec):
 	cmpq  $(VEC_SIZE * 4), %rdx
@@ -150,7 +151,12 @@ L(loop_start):
 	addq	%rdi, %rdx
 	andq	$-(VEC_SIZE * 4), %rdx
 	cmpq	%rdx, %rcx
+# if VEC_SIZE == 32 || VEC_SIZE == 64
+	/* Force 32-bit displacement to avoid long nop.  */
+	je.d32	L(return)
+# else
 	je	L(return)
+# endif
 	.p2align 4
 L(loop):
 	VMOVA	%VEC(0), (%rcx)

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

Summary of changes:
 .../x86_64/multiarch/memmove-vec-unaligned-erms.S  |    3 ++-
 .../x86_64/multiarch/memset-vec-unaligned-erms.S   |    8 +++++++-
 2 files changed, 9 insertions(+), 2 deletions(-)


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