aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorUlrich Drepper <drepper@redhat.com>2009-04-10 07:57:20 +0000
committerUlrich Drepper <drepper@redhat.com>2009-04-10 07:57:20 +0000
commitf140a0d53d639c86408ac532091fb4644faa95c0 (patch)
tree6e9b9da4411bfefc3fa2570b2335406658d76f0d
parent1d498daa95384e5c9ad5bcb35e7a996e5869ac39 (diff)
downloadglibc-f140a0d53d639c86408ac532091fb4644faa95c0.zip
glibc-f140a0d53d639c86408ac532091fb4644faa95c0.tar.gz
glibc-f140a0d53d639c86408ac532091fb4644faa95c0.tar.bz2
* sysdeps/x86_64/rawmemchr.S: New file.
-rw-r--r--ChangeLog2
-rw-r--r--sysdeps/x86_64/memchr.S3
-rw-r--r--sysdeps/x86_64/rawmemchr.S54
3 files changed, 57 insertions, 2 deletions
diff --git a/ChangeLog b/ChangeLog
index c0d26fc..6a28967 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,7 @@
2009-04-09 Ulrich Drepper <drepper@redhat.com>
+ * sysdeps/x86_64/rawmemchr.S: New file.
+
* stdio-common/vfprintf.c (vfprintf): Slightly more compact code.
Simplified code and possible copy problem fixed.
diff --git a/sysdeps/x86_64/memchr.S b/sysdeps/x86_64/memchr.S
index 644362d..09ba6d4 100644
--- a/sysdeps/x86_64/memchr.S
+++ b/sysdeps/x86_64/memchr.S
@@ -1,5 +1,4 @@
-/* strlen(str) -- determine the length of the string STR.
- Copyright (C) 2009 Free Software Foundation, Inc.
+/* Copyright (C) 2009 Free Software Foundation, Inc.
Contributed by Ulrich Drepper <drepper@redhat.com>.
This file is part of the GNU C Library.
diff --git a/sysdeps/x86_64/rawmemchr.S b/sysdeps/x86_64/rawmemchr.S
new file mode 100644
index 0000000..c3bd771
--- /dev/null
+++ b/sysdeps/x86_64/rawmemchr.S
@@ -0,0 +1,54 @@
+/* Copyright (C) 2009 Free Software Foundation, Inc.
+ Contributed by Ulrich Drepper <drepper@redhat.com>.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <sysdep.h>
+
+
+ .text
+ENTRY (rawmemchr)
+ movd %esi, %xmm1
+ movq %rdi, %rcx
+ punpcklbw %xmm1, %xmm1
+ andq $~15, %rdi
+ punpcklbw %xmm1, %xmm1
+ orl $0xffffffff, %esi
+ movdqa (%rdi), %xmm0
+ pshufd $0, %xmm1, %xmm1
+ subq %rdi, %rcx
+ pcmpeqb %xmm1, %xmm0
+ shl %cl, %esi
+ pmovmskb %xmm0, %ecx
+ leaq 16(%rdi), %rdi
+ andl %esi, %ecx
+ jnz 1f
+
+2: movdqa (%rdi), %xmm0
+ leaq 16(%rdi), %rdi
+ pcmpeqb %xmm1, %xmm0
+ pmovmskb %xmm0, %ecx
+ testl %ecx, %ecx
+ jz 2b
+
+1: bsfl %ecx, %ecx
+ leaq -16(%rcx,%rdi), %rax
+ ret
+END (rawmemchr)
+
+strong_alias (rawmemchr, __rawmemchr)
+libc_hidden_builtin_def (__rawmemchr)