Add x86 32-bit SSE4.2 string functions.

This patch adds 32bit SSE4.2 string functions.  It uses -16L instead of
0xfffffffffffffff0L, which works for both 32bit and 64bit long.  Tested
on 32bit Core i7 and Core 2.

1 files changed, 99 insertions, 0 deletions

diff --git a/sysdeps/i386/i686/multiarch/strcspn.S b/sysdeps/i386/i686/multiarch/strcspn.S
new file mode 100644
index 0000000000..f5ca092340
--- /dev/null
+++ b/sysdeps/i386/i686/multiarch/strcspn.S
@@ -0,0 +1,99 @@
+/* Multiple versions of strcspn
+   Copyright (C) 2009 Free Software Foundation, Inc.
+   Contributed by Intel Corporation.
+   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 <config.h>
+
+#ifdef HAVE_SSE4_SUPPORT
+
+#include <sysdep.h>
+#include <ifunc-defines.h>
+
+#ifdef USE_AS_STRPBRK
+#define STRCSPN_SSE42	__strpbrk_sse42
+#define STRCSPN_IA32	__strpbrk_ia32
+#define __GI_STRCSPN	__GI_strpbrk
+#else
+#ifndef STRCSPN
+#define STRCSPN		strcspn
+#define STRCSPN_SSE42	__strcspn_sse42
+#define STRCSPN_IA32	__strcspn_ia32
+#define __GI_STRCSPN	__GI_strcspn
+#endif
+#endif
+
+/* Define multiple versions only for the definition in libc.  Don't
+   define multiple versions for strpbrk in static library since we
+   need strpbrk before the initialization happened.  */
+#if (defined SHARED || !defined USE_AS_STRPBRK) && !defined NOT_IN_libc
+	.section	.gnu.linkonce.t.__i686.get_pc_thunk.bx,"ax",@progbits
+	.globl	__i686.get_pc_thunk.bx
+	.hidden	__i686.get_pc_thunk.bx
+	.p2align 4
+	.type	__i686.get_pc_thunk.bx,@function
+__i686.get_pc_thunk.bx:
+	movl	(%esp), %ebx
+	ret
+
+	.text
+ENTRY(STRCSPN)
+	.type	STRCSPN, @gnu_indirect_function
+	pushl	%ebx
+	cfi_adjust_cfa_offset (4)
+	cfi_rel_offset (ebx, 0)
+	call	__i686.get_pc_thunk.bx
+	addl	$_GLOBAL_OFFSET_TABLE_, %ebx
+	cmpl	$0, KIND_OFFSET+__cpu_features@GOTOFF(%ebx)
+	jne	1f
+	call	__init_cpu_features
+1:	leal	STRCSPN_IA32@GOTOFF(%ebx), %eax
+	testl	$(1<<20), CPUID_OFFSET+COMMON_CPUID_INDEX_1*CPUID_SIZE+CPUID_ECX_OFFSET+__cpu_features@GOTOFF(%ebx)
+	jz	2f
+	leal	STRCSPN_SSE42@GOTOFF(%ebx), %eax
+2:	popl	%ebx
+	cfi_adjust_cfa_offset (-4);
+	cfi_restore (ebx)
+	ret
+END(STRCSPN)
+
+# undef ENTRY
+# define ENTRY(name) \
+	.type STRCSPN_IA32, @function; \
+	.globl STRCSPN_IA32; \
+	.p2align 4; \
+	STRCSPN_IA32: cfi_startproc; \
+	CALL_MCOUNT
+# undef END
+# define END(name) \
+	cfi_endproc; .size STRCSPN_IA32, .-STRCSPN_IA32
+# undef libc_hidden_builtin_def
+/* It doesn't make sense to send libc-internal strcspn calls through a PLT.
+   The speedup we get from using SSE4.2 instruction is likely eaten away
+   by the indirect call in the PLT.  */
+# define libc_hidden_builtin_def(name) \
+	.globl __GI_STRCSPN; __GI_STRCSPN = STRCSPN_IA32
+#endif
+
+#endif /* HAVE_SSE4_SUPPORT */
+
+#ifdef USE_AS_STRPBRK
+#include "../../strpbrk.S"
+#else
+#include "../../strcspn.S"
+#endif