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GNU C Library master sources branch, master, updated. glibc-2.12-121-g73f27d5


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http://sources.redhat.com/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=73f27d5e722ece05a66c124406cc8ca4305f4cbd

commit 73f27d5e722ece05a66c124406cc8ca4305f4cbd
Author: Richard Henderson <rth@redhat.com>
Date:   Tue Aug 24 11:35:01 2010 -0700

    Clean up SSE variable shifts

diff --git a/ChangeLog b/ChangeLog
index 1da347c..f8050d7 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,20 @@
+2010-08-24  Richard Henderson  <rth@redhat.com>
+	    Ulrich Drepper  <drepper@redhat.com>
+	    H.J. Lu  <hongjiu.lu@intel.com>
+
+	* sysdeps/i386/i686/multiarch/Makefile (sysdep_routines): Add varshift.
+	* sysdeps/x86_64/multiarch/Makefile (sysdep_routines): Likewise.
+	* sysdeps/x86_64/multiarch/strcspn-c.c: Include "varshift.h".
+	Replace _mm_srli_si128 with __m128i_shift_right.  Replace
+	_mm_alignr_epi8 with _mm_loadu_si128.
+	* sysdeps/x86_64/multiarch/strspn-c.c: Likewise.
+	* sysdeps/x86_64/multiarch/strstr.c: Include "varshift.h".
+	(__m128i_shift_right): Removed.
+	* sysdeps/i386/i686/multiarch/varshift.h: New file.
+	* sysdeps/i386/i686/multiarch/varshift.S: New file.
+	* sysdeps/x86_64/multiarch/varshift.h: New file.
+	* sysdeps/x86_64/multiarch/varshift.S: New file.
+
 2010-08-21  Mike Frysinger  <vapier@gentoo.org>
 
 	* configure.in: Move assembler checks to before sysdep dir checking.
diff --git a/sysdeps/i386/i686/multiarch/Makefile b/sysdeps/i386/i686/multiarch/Makefile
index 12bcfc2..26f3e58 100644
--- a/sysdeps/i386/i686/multiarch/Makefile
+++ b/sysdeps/i386/i686/multiarch/Makefile
@@ -9,7 +9,7 @@ sysdep_routines += bzero-sse2 memset-sse2 memcpy-ssse3 mempcpy-ssse3 \
 		   memmove-ssse3-rep bcopy-ssse3 bcopy-ssse3-rep \
 		   memset-sse2-rep bzero-sse2-rep strcmp-ssse3 \
 		   strcmp-sse4 strncmp-c strncmp-ssse3 strncmp-sse4 \
-		   memcmp-ssse3 memcmp-sse4 strcasestr-nonascii
+		   memcmp-ssse3 memcmp-sse4 strcasestr-nonascii varshift
 ifeq (yes,$(config-cflags-sse4))
 sysdep_routines += strcspn-c strpbrk-c strspn-c strstr-c strcasestr-c
 CFLAGS-strcspn-c.c += -msse4
diff --git a/sysdeps/i386/i686/multiarch/varshift.S b/sysdeps/i386/i686/multiarch/varshift.S
new file mode 100644
index 0000000..41afaf7
--- /dev/null
+++ b/sysdeps/i386/i686/multiarch/varshift.S
@@ -0,0 +1 @@
+#include <sysdeps/x86_64/multiarch/varshift.S>
diff --git a/sysdeps/i386/i686/multiarch/varshift.h b/sysdeps/i386/i686/multiarch/varshift.h
new file mode 100644
index 0000000..7c72c70
--- /dev/null
+++ b/sysdeps/i386/i686/multiarch/varshift.h
@@ -0,0 +1 @@
+#include <sysdeps/x86_64/multiarch/varshift.h>
diff --git a/sysdeps/x86_64/multiarch/Makefile b/sysdeps/x86_64/multiarch/Makefile
index b124524..27dc563 100644
--- a/sysdeps/x86_64/multiarch/Makefile
+++ b/sysdeps/x86_64/multiarch/Makefile
@@ -10,7 +10,7 @@ sysdep_routines += stpncpy-c strncpy-c strcmp-ssse3 strncmp-ssse3 \
 		   memmove-ssse3-back strcasestr-nonascii strcasecmp_l-ssse3 \
 		   strncase_l-ssse3
 ifeq (yes,$(config-cflags-sse4))
-sysdep_routines += strcspn-c strpbrk-c strspn-c strstr-c strcasestr-c
+sysdep_routines += strcspn-c strpbrk-c strspn-c strstr-c strcasestr-c varshift
 CFLAGS-strcspn-c.c += -msse4
 CFLAGS-strpbrk-c.c += -msse4
 CFLAGS-strspn-c.c += -msse4
diff --git a/sysdeps/x86_64/multiarch/strcspn-c.c b/sysdeps/x86_64/multiarch/strcspn-c.c
index daeebe1..04aba46 100644
--- a/sysdeps/x86_64/multiarch/strcspn-c.c
+++ b/sysdeps/x86_64/multiarch/strcspn-c.c
@@ -20,6 +20,7 @@
 
 #include <nmmintrin.h>
 #include <string.h>
+#include "varshift.h"
 
 /* We use 0x2:
 	_SIDD_SBYTE_OPS
@@ -86,8 +87,6 @@ STRCSPN_SSE42 (const char *s, const char *a)
 
   const char *aligned;
   __m128i mask;
-  /* Fake initialization.  gcc otherwise will warn.  */
-  asm ("" : "=xm" (mask));
   int offset = (int) ((size_t) a & 15);
   if (offset != 0)
     {
@@ -95,54 +94,7 @@ STRCSPN_SSE42 (const char *s, const char *a)
       aligned = (const char *) ((size_t) a & -16L);
       __m128i mask0 = _mm_load_si128 ((__m128i *) aligned);
 
-      switch (offset)
-	{
-	case 1:
-	  mask = _mm_srli_si128 (mask0, 1);
-	  break;
-	case 2:
-	  mask = _mm_srli_si128 (mask0, 2);
-	  break;
-	case 3:
-	  mask = _mm_srli_si128 (mask0, 3);
-	  break;
-	case 4:
-	  mask = _mm_srli_si128 (mask0, 4);
-	  break;
-	case 5:
-	  mask = _mm_srli_si128 (mask0, 5);
-	  break;
-	case 6:
-	  mask = _mm_srli_si128 (mask0, 6);
-	  break;
-	case 7:
-	  mask = _mm_srli_si128 (mask0, 7);
-	  break;
-	case 8:
-	  mask = _mm_srli_si128 (mask0, 8);
-	  break;
-	case 9:
-	  mask = _mm_srli_si128 (mask0, 9);
-	  break;
-	case 10:
-	  mask = _mm_srli_si128 (mask0, 10);
-	  break;
-	case 11:
-	  mask = _mm_srli_si128 (mask0, 11);
-	  break;
-	case 12:
-	  mask = _mm_srli_si128 (mask0, 12);
-	  break;
-	case 13:
-	  mask = _mm_srli_si128 (mask0, 13);
-	  break;
-	case 14:
-	  mask = _mm_srli_si128 (mask0, 14);
-	  break;
-	case 15:
-	  mask = _mm_srli_si128 (mask0, 15);
-	  break;
-	}
+      mask = __m128i_shift_right (mask0, offset);
 
       /* Find where the NULL terminator is.  */
       int length = _mm_cmpistri (mask, mask, 0x3a);
@@ -159,55 +111,10 @@ STRCSPN_SSE42 (const char *s, const char *a)
 
 	  if (index != 0)
 	    {
-	      /* Combine mask0 and mask1.  */
-	      switch (offset)
-		{
-		case 1:
-		  mask = _mm_alignr_epi8 (mask1, mask0, 1);
-		  break;
-		case 2:
-		  mask = _mm_alignr_epi8 (mask1, mask0, 2);
-		  break;
-		case 3:
-		  mask = _mm_alignr_epi8 (mask1, mask0, 3);
-		  break;
-		case 4:
-		  mask = _mm_alignr_epi8 (mask1, mask0, 4);
-		  break;
-		case 5:
-		  mask = _mm_alignr_epi8 (mask1, mask0, 5);
-		  break;
-		case 6:
-		  mask = _mm_alignr_epi8 (mask1, mask0, 6);
-		  break;
-		case 7:
-		  mask = _mm_alignr_epi8 (mask1, mask0, 7);
-		  break;
-		case 8:
-		  mask = _mm_alignr_epi8 (mask1, mask0, 8);
-		  break;
-		case 9:
-		  mask = _mm_alignr_epi8 (mask1, mask0, 9);
-		  break;
-		case 10:
-		  mask = _mm_alignr_epi8 (mask1, mask0, 10);
-		  break;
-		case 11:
-		  mask = _mm_alignr_epi8 (mask1, mask0, 11);
-		  break;
-		case 12:
-		  mask = _mm_alignr_epi8 (mask1, mask0, 12);
-		  break;
-		case 13:
-		  mask = _mm_alignr_epi8 (mask1, mask0, 13);
-		  break;
-		case 14:
-		  mask = _mm_alignr_epi8 (mask1, mask0, 14);
-		  break;
-		case 15:
-		  mask = _mm_alignr_epi8 (mask1, mask0, 15);
-		  break;
-		}
+	      /* Combine mask0 and mask1.  We could play games with
+		 palignr, but frankly this data should be in L1 now
+		 so do the merge via an unaligned load.  */
+	      mask = _mm_loadu_si128 ((__m128i *) a);
 	    }
 	}
     }
@@ -234,54 +141,7 @@ STRCSPN_SSE42 (const char *s, const char *a)
       aligned = (const char *) ((size_t) s & -16L);
       __m128i value = _mm_load_si128 ((__m128i *) aligned);
 
-      switch (offset)
-	{
-	case 1:
-	  value = _mm_srli_si128 (value, 1);
-	  break;
-	case 2:
-	  value = _mm_srli_si128 (value, 2);
-	  break;
-	case 3:
-	  value = _mm_srli_si128 (value, 3);
-	  break;
-	case 4:
-	  value = _mm_srli_si128 (value, 4);
-	  break;
-	case 5:
-	  value = _mm_srli_si128 (value, 5);
-	  break;
-	case 6:
-	  value = _mm_srli_si128 (value, 6);
-	  break;
-	case 7:
-	  value = _mm_srli_si128 (value, 7);
-	  break;
-	case 8:
-	  value = _mm_srli_si128 (value, 8);
-	  break;
-	case 9:
-	  value = _mm_srli_si128 (value, 9);
-	  break;
-	case 10:
-	  value = _mm_srli_si128 (value, 10);
-	  break;
-	case 11:
-	  value = _mm_srli_si128 (value, 11);
-	  break;
-	case 12:
-	  value = _mm_srli_si128 (value, 12);
-	  break;
-	case 13:
-	  value = _mm_srli_si128 (value, 13);
-	  break;
-	case 14:
-	  value = _mm_srli_si128 (value, 14);
-	  break;
-	case 15:
-	  value = _mm_srli_si128 (value, 15);
-	  break;
-	}
+      value = __m128i_shift_right (value, offset);
 
       int length = _mm_cmpistri (mask, value, 0x2);
       /* No need to check ZFlag since ZFlag is always 1.  */
diff --git a/sysdeps/x86_64/multiarch/strspn-c.c b/sysdeps/x86_64/multiarch/strspn-c.c
index be9e8ac..ab58549 100644
--- a/sysdeps/x86_64/multiarch/strspn-c.c
+++ b/sysdeps/x86_64/multiarch/strspn-c.c
@@ -20,6 +20,7 @@
 
 #include <nmmintrin.h>
 #include <string.h>
+#include "varshift.h"
 
 /* We use 0x12:
 	_SIDD_SBYTE_OPS
@@ -71,54 +72,7 @@ __strspn_sse42 (const char *s, const char *a)
       aligned = (const char *) ((size_t) a & -16L);
       __m128i mask0 = _mm_load_si128 ((__m128i *) aligned);
 
-      switch (offset)
-	{
-	case 1:
-	  mask = _mm_srli_si128 (mask0, 1);
-	  break;
-	case 2:
-	  mask = _mm_srli_si128 (mask0, 2);
-	  break;
-	case 3:
-	  mask = _mm_srli_si128 (mask0, 3);
-	  break;
-	case 4:
-	  mask = _mm_srli_si128 (mask0, 4);
-	  break;
-	case 5:
-	  mask = _mm_srli_si128 (mask0, 5);
-	  break;
-	case 6:
-	  mask = _mm_srli_si128 (mask0, 6);
-	  break;
-	case 7:
-	  mask = _mm_srli_si128 (mask0, 7);
-	  break;
-	case 8:
-	  mask = _mm_srli_si128 (mask0, 8);
-	  break;
-	case 9:
-	  mask = _mm_srli_si128 (mask0, 9);
-	  break;
-	case 10:
-	  mask = _mm_srli_si128 (mask0, 10);
-	  break;
-	case 11:
-	  mask = _mm_srli_si128 (mask0, 11);
-	  break;
-	case 12:
-	  mask = _mm_srli_si128 (mask0, 12);
-	  break;
-	case 13:
-	  mask = _mm_srli_si128 (mask0, 13);
-	  break;
-	case 14:
-	  mask = _mm_srli_si128 (mask0, 14);
-	  break;
-	case 15:
-	  mask = _mm_srli_si128 (mask0, 15);
-	  break;
-	}
+      mask = __m128i_shift_right (mask0, offset);
 
       /* Find where the NULL terminator is.  */
       int length = _mm_cmpistri (mask, mask, 0x3a);
@@ -135,55 +89,10 @@ __strspn_sse42 (const char *s, const char *a)
 
 	  if (index != 0)
 	    {
-	      /* Combine mask0 and mask1.  */
-	      switch (offset)
-		{
-		case 1:
-		  mask = _mm_alignr_epi8 (mask1, mask0, 1);
-		  break;
-		case 2:
-		  mask = _mm_alignr_epi8 (mask1, mask0, 2);
-		  break;
-		case 3:
-		  mask = _mm_alignr_epi8 (mask1, mask0, 3);
-		  break;
-		case 4:
-		  mask = _mm_alignr_epi8 (mask1, mask0, 4);
-		  break;
-		case 5:
-		  mask = _mm_alignr_epi8 (mask1, mask0, 5);
-		  break;
-		case 6:
-		  mask = _mm_alignr_epi8 (mask1, mask0, 6);
-		  break;
-		case 7:
-		  mask = _mm_alignr_epi8 (mask1, mask0, 7);
-		  break;
-		case 8:
-		  mask = _mm_alignr_epi8 (mask1, mask0, 8);
-		  break;
-		case 9:
-		  mask = _mm_alignr_epi8 (mask1, mask0, 9);
-		  break;
-		case 10:
-		  mask = _mm_alignr_epi8 (mask1, mask0, 10);
-		  break;
-		case 11:
-		  mask = _mm_alignr_epi8 (mask1, mask0, 11);
-		  break;
-		case 12:
-		  mask = _mm_alignr_epi8 (mask1, mask0, 12);
-		  break;
-		case 13:
-		  mask = _mm_alignr_epi8 (mask1, mask0, 13);
-		  break;
-		case 14:
-		  mask = _mm_alignr_epi8 (mask1, mask0, 14);
-		  break;
-		case 15:
-		  mask = _mm_alignr_epi8 (mask1, mask0, 15);
-		  break;
-		}
+	      /* Combine mask0 and mask1.  We could play games with
+		 palignr, but frankly this data should be in L1 now
+		 so do the merge via an unaligned load.  */
+	      mask = _mm_loadu_si128 ((__m128i *) a);
 	    }
 	}
     }
@@ -210,54 +119,7 @@ __strspn_sse42 (const char *s, const char *a)
       aligned = (const char *) ((size_t) s & -16L);
       __m128i value = _mm_load_si128 ((__m128i *) aligned);
 
-      switch (offset)
-	{
-	case 1:
-	  value = _mm_srli_si128 (value, 1);
-	  break;
-	case 2:
-	  value = _mm_srli_si128 (value, 2);
-	  break;
-	case 3:
-	  value = _mm_srli_si128 (value, 3);
-	  break;
-	case 4:
-	  value = _mm_srli_si128 (value, 4);
-	  break;
-	case 5:
-	  value = _mm_srli_si128 (value, 5);
-	  break;
-	case 6:
-	  value = _mm_srli_si128 (value, 6);
-	  break;
-	case 7:
-	  value = _mm_srli_si128 (value, 7);
-	  break;
-	case 8:
-	  value = _mm_srli_si128 (value, 8);
-	  break;
-	case 9:
-	  value = _mm_srli_si128 (value, 9);
-	  break;
-	case 10:
-	  value = _mm_srli_si128 (value, 10);
-	  break;
-	case 11:
-	  value = _mm_srli_si128 (value, 11);
-	  break;
-	case 12:
-	  value = _mm_srli_si128 (value, 12);
-	  break;
-	case 13:
-	  value = _mm_srli_si128 (value, 13);
-	  break;
-	case 14:
-	  value = _mm_srli_si128 (value, 14);
-	  break;
-	case 15:
-	  value = _mm_srli_si128 (value, 15);
-	  break;
-	}
+      value = __m128i_shift_right (value, offset);
 
       int length = _mm_cmpistri (mask, value, 0x12);
       /* No need to check CFlag since it is always 1.  */
diff --git a/sysdeps/x86_64/multiarch/strstr.c b/sysdeps/x86_64/multiarch/strstr.c
index 45d7a55..b408b75 100644
--- a/sysdeps/x86_64/multiarch/strstr.c
+++ b/sysdeps/x86_64/multiarch/strstr.c
@@ -19,6 +19,7 @@
    02111-1307 USA.  */
 
 #include <nmmintrin.h>
+#include "varshift.h"
 
 #ifndef STRSTR_SSE42
 # define STRSTR_SSE42 __strstr_sse42
@@ -82,67 +83,6 @@
    5.  failed string compare, go back to scanning
  */
 
-/* Fix-up of removal of unneeded data due to 16B aligned load
-   parameters:
-     value: 16B data loaded from 16B aligned address.
-     offset: Offset of target data address relative to 16B aligned load
-	     address.
- */
-
-static __inline__ __m128i
-__m128i_shift_right (__m128i value, int offset)
-{
-  switch (offset)
-    {
-    case 1:
-      value = _mm_srli_si128 (value, 1);
-      break;
-    case 2:
-      value = _mm_srli_si128 (value, 2);
-      break;
-    case 3:
-      value = _mm_srli_si128 (value, 3);
-      break;
-    case 4:
-      value = _mm_srli_si128 (value, 4);
-      break;
-    case 5:
-      value = _mm_srli_si128 (value, 5);
-      break;
-    case 6:
-      value = _mm_srli_si128 (value, 6);
-      break;
-    case 7:
-      value = _mm_srli_si128 (value, 7);
-      break;
-    case 8:
-      value = _mm_srli_si128 (value, 8);
-      break;
-    case 9:
-      value = _mm_srli_si128 (value, 9);
-      break;
-    case 10:
-      value = _mm_srli_si128 (value, 10);
-      break;
-    case 11:
-      value = _mm_srli_si128 (value, 11);
-      break;
-    case 12:
-      value = _mm_srli_si128 (value, 12);
-      break;
-    case 13:
-      value = _mm_srli_si128 (value, 13);
-      break;
-    case 14:
-      value = _mm_srli_si128 (value, 14);
-      break;
-    case 15:
-      value = _mm_srli_si128 (value, 15);
-      break;
-    }
-  return value;
-}
-
 /* Simple replacement of movdqu to address 4KB boundary cross issue.
    If EOS occurs within less than 16B before 4KB boundary, we don't
    cross to next page.  */
diff --git a/sysdeps/x86_64/multiarch/varshift.S b/sysdeps/x86_64/multiarch/varshift.S
new file mode 100644
index 0000000..b50f98b
--- /dev/null
+++ b/sysdeps/x86_64/multiarch/varshift.S
@@ -0,0 +1,30 @@
+/* Helper for variable shifts of SSE registers.
+   Copyright (C) 2010 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
+   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>
+
+
+	.section .rodata
+	.hidden	___m128i_shift_right
+	.globl	___m128i_shift_right
+	.size	___m128i_shift_right, 31
+
+___m128i_shift_right:
+	.byte	  0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15
+	.byte	 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1
diff --git a/sysdeps/x86_64/multiarch/varshift.h b/sysdeps/x86_64/multiarch/varshift.h
new file mode 100644
index 0000000..d679739
--- /dev/null
+++ b/sysdeps/x86_64/multiarch/varshift.h
@@ -0,0 +1,27 @@
+/* Helper for variable shifts of SSE registers.
+   Copyright (C) 2010 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
+   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.  */
+
+
+extern char ___m128i_shift_right[31] __attribute__((visibility("hidden")));
+
+static __inline__ __m128i
+__m128i_shift_right (__m128i value, unsigned long offset)
+{
+  return _mm_shuffle_epi8 (value, _mm_loadu_si128 ((__m128 *) (___m128i_shift_right + offset)));
+}

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

Summary of changes:
 ChangeLog                              |   17 ++++
 sysdeps/i386/i686/multiarch/Makefile   |    2 +-
 sysdeps/i386/i686/multiarch/varshift.S |    1 +
 sysdeps/i386/i686/multiarch/varshift.h |    1 +
 sysdeps/x86_64/multiarch/Makefile      |    2 +-
 sysdeps/x86_64/multiarch/strcspn-c.c   |  154 ++------------------------------
 sysdeps/x86_64/multiarch/strspn-c.c    |  152 ++------------------------------
 sysdeps/x86_64/multiarch/strstr.c      |   62 +-------------
 sysdeps/x86_64/multiarch/varshift.S    |   30 ++++++
 sysdeps/x86_64/multiarch/varshift.h    |   27 ++++++
 10 files changed, 93 insertions(+), 355 deletions(-)
 create mode 100644 sysdeps/i386/i686/multiarch/varshift.S
 create mode 100644 sysdeps/i386/i686/multiarch/varshift.h
 create mode 100644 sysdeps/x86_64/multiarch/varshift.S
 create mode 100644 sysdeps/x86_64/multiarch/varshift.h


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