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base/SOURCES/glibc-rh1385004-13.patch

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From 7cb28f3e21ff0c9658fad3d021e5a5548e1e49ae Mon Sep 17 00:00:00 2001
From: Rajalakshmi Srinivasaraghavan <raji@linux.vnet.ibm.com>
Date: Wed, 20 Apr 2016 23:10:42 +0530
Subject: [PATCH] powerpc: strcasestr optmization for power8
This patch optimizes strcasestr function for power >= 8 systems. The average
improvement of this optimization is ~40% and compares 16 bytes at a time
using vector instructions. This patch is tested on powerpc64 and powerpc64le.
(cherry picked from commit e413b14e18ac635b5683ab7bbb1c901f79d1b06b)
---
ChangeLog | 15 +
sysdeps/powerpc/locale-defines.sym | 4 +
sysdeps/powerpc/powerpc64/multiarch/Makefile | 3 +-
.../powerpc/powerpc64/multiarch/ifunc-impl-list.c | 8 +
.../powerpc64/multiarch/strcasestr-power8.S | 49 ++
.../powerpc/powerpc64/multiarch/strcasestr-ppc64.c | 34 ++
sysdeps/powerpc/powerpc64/multiarch/strcasestr.c | 37 ++
sysdeps/powerpc/powerpc64/power8/Makefile | 3 +
.../powerpc/powerpc64/power8/strcasestr-ppc64.c | 29 ++
sysdeps/powerpc/powerpc64/power8/strcasestr.S | 531 +++++++++++++++++++++
10 files changed, 712 insertions(+), 1 deletion(-)
create mode 100644 sysdeps/powerpc/powerpc64/multiarch/strcasestr-power8.S
create mode 100644 sysdeps/powerpc/powerpc64/multiarch/strcasestr-ppc64.c
create mode 100644 sysdeps/powerpc/powerpc64/multiarch/strcasestr.c
create mode 100644 sysdeps/powerpc/powerpc64/power8/Makefile
create mode 100644 sysdeps/powerpc/powerpc64/power8/strcasestr-ppc64.c
create mode 100644 sysdeps/powerpc/powerpc64/power8/strcasestr.S
diff --git a/ChangeLog b/ChangeLog
index e7ea58a..6677ea2 100644
diff --git a/sysdeps/powerpc/locale-defines.sym b/sysdeps/powerpc/locale-defines.sym
index af64b92..5c5379c 100644
--- a/sysdeps/powerpc/locale-defines.sym
+++ b/sysdeps/powerpc/locale-defines.sym
@@ -3,3 +3,7 @@
--
LOCALE_CTYPE_TOLOWER offsetof (struct __locale_struct, __ctype_tolower)
+LOCALE_CTYPE_TOUPPER offsetof (struct __locale_struct, __ctype_toupper)
+_NL_CTYPE_NONASCII_CASE
+LOCALE_DATA_VALUES offsetof (struct __locale_data, values)
+SIZEOF_VALUES sizeof (((struct __locale_data *) 0)->values[0])
diff --git a/sysdeps/powerpc/powerpc64/multiarch/Makefile b/sysdeps/powerpc/powerpc64/multiarch/Makefile
index 57abe8f..7f70ceb 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/Makefile
+++ b/sysdeps/powerpc/powerpc64/multiarch/Makefile
@@ -20,6 +20,7 @@ sysdep_routines += memcpy-power7 memcpy-a2 memcpy-power6 memcpy-cell \
mempcpy-power7 mempcpy-ppc64 memchr-power7 memchr-ppc64 \
memrchr-power7 memrchr-ppc64 rawmemchr-power7 \
stpcpy-power8 stpcpy-power7 stpcpy-ppc64 \
+ strcasestr-power8 strcasestr-ppc64 \
strcat-power8 strcat-power7 strcat-ppc64 \
strcmp-power8 strcmp-power7 strcmp-ppc64 \
strcpy-power8 strcpy-power7 strcpy-ppc64 \
diff --git a/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c b/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c
index 583885c..994e852 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c
@@ -341,6 +341,14 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
IFUNC_IMPL_ADD (array, i, strstr, 1,
__strstr_ppc))
+ /* Support sysdeps/powerpc/powerpc64/multiarch/strcasestr.c. */
+ IFUNC_IMPL (i, name, strcasestr,
+ IFUNC_IMPL_ADD (array, i, strcasestr,
+ hwcap2 & PPC_FEATURE2_ARCH_2_07,
+ __strcasestr_power8)
+ IFUNC_IMPL_ADD (array, i, strcasestr, 1,
+ __strcasestr_ppc))
+
/* Support sysdeps/powerpc/powerpc64/multiarch/wcschr.c. */
IFUNC_IMPL (i, name, wcschr,
IFUNC_IMPL_ADD (array, i, wcschr,
diff --git a/sysdeps/powerpc/powerpc64/multiarch/strcasestr-power8.S b/sysdeps/powerpc/powerpc64/multiarch/strcasestr-power8.S
new file mode 100644
index 0000000..c77ff9f
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/multiarch/strcasestr-power8.S
@@ -0,0 +1,49 @@
+/* Optimized strcasestr implementation for POWER8.
+ Copyright (C) 2016 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, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <sysdep.h>
+
+#undef EALIGN
+#define EALIGN(name, alignt, words) \
+ .section ".text"; \
+ ENTRY_2(__strcasestr_power8) \
+ .align ALIGNARG(alignt); \
+ EALIGN_W_##words; \
+ BODY_LABEL(__strcasestr_power8): \
+ cfi_startproc; \
+ LOCALENTRY(__strcasestr_power8)
+
+#undef END
+#define END(name) \
+ cfi_endproc; \
+ TRACEBACK(__strcasestr_power8) \
+ END_2(__strcasestr_power8)
+
+#undef libc_hidden_builtin_def
+#define libc_hidden_builtin_def(name)
+
+/* The following definitions are used in strcasestr optimization. */
+
+/* strlen is used to calculate len of r4. */
+#define STRLEN __strlen_power8
+/* strnlen is used to check if len of r3 is more than r4. */
+#define STRNLEN __strnlen_power7
+/* strchr is used to check if first char of r4 is present in r3. */
+#define STRCHR __strchr_power7
+
+#include <sysdeps/powerpc/powerpc64/power8/strcasestr.S>
diff --git a/sysdeps/powerpc/powerpc64/multiarch/strcasestr-ppc64.c b/sysdeps/powerpc/powerpc64/multiarch/strcasestr-ppc64.c
new file mode 100644
index 0000000..7f7bb9e
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/multiarch/strcasestr-ppc64.c
@@ -0,0 +1,34 @@
+/* PowerPC64 default implementation of strcasestr.
+ Copyright (C) 2016 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, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <string.h>
+
+#define STRCASESTR __strcasestr_ppc
+#if IS_IN (libc) && defined(SHARED)
+# undef libc_hidden_builtin_def
+# define libc_hidden_builtin_def(name) \
+ __hidden_ver1(__strcasestr_ppc, __GI_strcasestr, __strcasestr_ppc);
+#endif
+
+
+#undef weak_alias
+#define weak_alias(a,b)
+
+extern __typeof (strcasestr) __strcasestr_ppc attribute_hidden;
+
+#include <string/strcasestr.c>
diff --git a/sysdeps/powerpc/powerpc64/multiarch/strcasestr.c b/sysdeps/powerpc/powerpc64/multiarch/strcasestr.c
new file mode 100644
index 0000000..17ba188
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/multiarch/strcasestr.c
@@ -0,0 +1,37 @@
+/* Multiple versions of strcasestr.
+ Copyright (C) 2016 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, see
+ <http://www.gnu.org/licenses/>. */
+
+#if IS_IN (libc)
+# include <string.h>
+# include <shlib-compat.h>
+# include "init-arch.h"
+
+extern __typeof (__strcasestr) __strcasestr_ppc attribute_hidden;
+extern __typeof (__strcasestr) __strcasestr_power8 attribute_hidden;
+
+/* Avoid DWARF definition DIE on ifunc symbol so that GDB can handle
+ ifunc symbol properly. */
+libc_ifunc (__strcasestr,
+ (hwcap2 & PPC_FEATURE2_ARCH_2_07)
+ ? __strcasestr_power8
+ : __strcasestr_ppc);
+
+weak_alias (__strcasestr, strcasestr)
+#else
+#include <string/strcasestr.c>
+#endif
diff --git a/sysdeps/powerpc/powerpc64/power8/Makefile b/sysdeps/powerpc/powerpc64/power8/Makefile
new file mode 100644
index 0000000..71a5952
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/power8/Makefile
@@ -0,0 +1,3 @@
+ifeq ($(subdir),string)
+sysdep_routines += strcasestr-ppc64
+endif
diff --git a/sysdeps/powerpc/powerpc64/power8/strcasestr-ppc64.c b/sysdeps/powerpc/powerpc64/power8/strcasestr-ppc64.c
new file mode 100644
index 0000000..09a07b0
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/power8/strcasestr-ppc64.c
@@ -0,0 +1,29 @@
+/* Optimized strcasestr implementation for PowerPC64/POWER8.
+ Copyright (C) 2016 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, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <string.h>
+
+#define STRCASESTR __strcasestr_ppc
+#undef libc_hidden_builtin_def
+#define libc_hidden_builtin_def(__name)
+
+#undef weak_alias
+#define weak_alias(a,b)
+extern __typeof (strcasestr) __strcasestr_ppc attribute_hidden;
+
+#include <string/strcasestr.c>
diff --git a/sysdeps/powerpc/powerpc64/power8/strcasestr.S b/sysdeps/powerpc/powerpc64/power8/strcasestr.S
new file mode 100644
index 0000000..24b2b76
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/power8/strcasestr.S
@@ -0,0 +1,531 @@
+/* Optimized strcasestr implementation for PowerPC64/POWER8.
+ Copyright (C) 2016 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, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <sysdep.h>
+#include <locale-defines.h>
+
+/* Char * [r3] strcasestr (char *s [r3], char * pat[r4]) */
+
+/* The performance gain is obtained by comparing 16 bytes. */
+
+/* When the first char of r4 is hit ITERATIONS times in r3
+ fallback to default. */
+#define ITERATIONS 64
+
+#ifndef STRLEN
+/* For builds without IFUNC support, local calls should be made to internal
+ GLIBC symbol (created by libc_hidden_builtin_def). */
+# ifdef SHARED
+# define STRLEN __GI_strlen
+# else
+# define STRLEN strlen
+# endif
+#endif
+
+#ifndef STRNLEN
+/* For builds without IFUNC support, local calls should be made to internal
+ GLIBC symbol (created by libc_hidden_builtin_def). */
+# ifdef SHARED
+# define STRNLEN __GI_strnlen
+# else
+# define STRNLEN __strnlen
+# endif
+#endif
+
+#ifndef STRCHR
+# ifdef SHARED
+# define STRCHR __GI_strchr
+# else
+# define STRCHR strchr
+# endif
+#endif
+
+/* Convert 16 bytes of v4 and reg to lowercase and compare. */
+#define TOLOWER(reg) \
+ vcmpgtub v6, v4, v1; \
+ vcmpgtub v7, v2, v4; \
+ vand v8, v7, v6; \
+ vand v8, v8, v3; \
+ vor v4, v8, v4; \
+ vcmpgtub v6, reg, v1; \
+ vcmpgtub v7, v2, reg; \
+ vand v8, v7, v6; \
+ vand v8, v8, v3; \
+ vor reg, v8, reg; \
+ vcmpequb. v6, reg, v4;
+
+/* TODO: change these to the actual instructions when the minimum required
+ binutils allows it. */
+#ifdef _ARCH_PWR8
+#define VCLZD_V8_v7 vclzd v8, v7;
+#else
+#define VCLZD_V8_v7 .long 0x11003fc2
+#endif
+
+#define FRAMESIZE (FRAME_MIN_SIZE+48)
+/* TODO: change this to .machine power8 when the minimum required binutils
+ allows it. */
+ .machine power7
+EALIGN (strcasestr, 4, 0)
+ CALL_MCOUNT 2
+ mflr r0 /* Load link register LR to r0. */
+ std r31, -8(r1) /* Save callers register r31. */
+ std r30, -16(r1) /* Save callers register r30. */
+ std r29, -24(r1) /* Save callers register r29. */
+ std r28, -32(r1) /* Save callers register r28. */
+ std r27, -40(r1) /* Save callers register r27. */
+ std r0, 16(r1) /* Store the link register. */
+ cfi_offset(r31, -8)
+ cfi_offset(r30, -16)
+ cfi_offset(r29, -24)
+ cfi_offset(r28, -32)
+ cfi_offset(r27, -40)
+ cfi_offset(lr, 16)
+ stdu r1, -FRAMESIZE(r1) /* Create the stack frame. */
+ cfi_adjust_cfa_offset(FRAMESIZE)
+
+ dcbt 0, r3
+ dcbt 0, r4
+ cmpdi cr7, r3, 0 /* Input validation. */
+ beq cr7, L(retnull)
+ cmpdi cr7, r4, 0
+ beq cr7, L(retnull)
+
+ mr r29, r3
+ mr r30, r4
+ /* Load first byte from r4 and check if its null. */
+ lbz r6, 0(r4)
+ cmpdi cr7, r6, 0
+ beq cr7, L(ret_r3)
+
+ ld r10, __libc_tsd_LOCALE@got@tprel(r2)
+ add r9, r10, __libc_tsd_LOCALE@tls
+ ld r9, 0(r9)
+ ld r9, LOCALE_CTYPE_TOUPPER(r9)
+ sldi r10, r6, 2 /* Convert to upper case. */
+ lwzx r28, r9, r10
+
+ ld r10, __libc_tsd_LOCALE@got@tprel(r2)
+ add r11, r10, __libc_tsd_LOCALE@tls
+ ld r11, 0(r11)
+ ld r11, LOCALE_CTYPE_TOLOWER(r11)
+ sldi r10, r6, 2 /* Convert to lower case. */
+ lwzx r27, r11, r10
+
+ /* Check if the first char is present. */
+ mr r4, r27
+ bl STRCHR
+ nop
+ mr r5, r3
+ mr r3, r29
+ mr r29, r5
+ mr r4, r28
+ bl STRCHR
+ nop
+ cmpdi cr7, r29, 0
+ beq cr7, L(firstpos)
+ cmpdi cr7, r3, 0
+ beq cr7, L(skipcheck)
+ cmpw cr7, r3, r29
+ ble cr7, L(firstpos)
+ /* Move r3 to the first occurence. */
+L(skipcheck):
+ mr r3, r29
+L(firstpos):
+ mr r29, r3
+
+ sldi r9, r27, 8
+ or r28, r9, r28
+ /* Reg r27 is used to count the number of iterations. */
+ li r27, 0
+ /* If first char of search str is not present. */
+ cmpdi cr7, r3, 0
+ ble cr7, L(end)
+
+ /* Find the length of pattern. */
+ mr r3, r30
+ bl STRLEN
+ nop
+
+ cmpdi cr7, r3, 0 /* If search str is null. */
+ beq cr7, L(ret_r3)
+
+ mr r31, r3
+ mr r4, r3
+ mr r3, r29
+ bl STRNLEN
+ nop
+
+ cmpd cr7, r3, r31 /* If len(r3) < len(r4). */
+ blt cr7, L(retnull)
+
+ mr r3, r29
+
+ /* Locales not matching ASCII for single bytes. */
+ ld r10, __libc_tsd_LOCALE@got@tprel(r2)
+ add r9, r10, __libc_tsd_LOCALE@tls
+ ld r9, 0(r9)
+ ld r7, 0(r9)
+ addi r7, r7, LOCALE_DATA_VALUES+_NL_CTYPE_NONASCII_CASE*SIZEOF_VALUES
+ lwz r8, 0(r7)
+ cmpdi cr7, r8, 1
+ beq cr7, L(bytebybyte)
+
+ /* If len(r4) < 16 handle byte by byte. */
+ /* For shorter strings we will not use vector registers. */
+ cmpdi cr7, r31, 16
+ blt cr7, L(bytebybyte)
+
+ /* Comparison values used for TOLOWER. */
+ /* Load v1 = 64('A' - 1), v2 = 91('Z' + 1), v3 = 32 in each byte. */
+ vspltish v0, 0
+ vspltisb v5, 2
+ vspltisb v4, 4
+ vsl v3, v5, v4
+ vaddubm v1, v3, v3
+ vspltisb v5, 15
+ vaddubm v2, v5, v5
+ vaddubm v2, v1, v2
+ vspltisb v4, -3
+ vaddubm v2, v2, v4
+
+ /*
+ 1. Load 16 bytes from r3 and r4
+ 2. Check if there is null, If yes, proceed byte by byte path.
+ 3. Else,Convert both to lowercase and compare.
+ 4. If they are same proceed to 1.
+ 5. If they dont match, find if first char of r4 is present in the
+ loaded 16 byte of r3.
+ 6. If yes, move position, load next 16 bytes of r3 and proceed to 2.
+ */
+
+ mr r8, r3 /* Save r3 for future use. */
+ mr r4, r30 /* Restore r4. */
+ clrldi r10, r4, 60
+ lvx v5, 0, r4 /* Load 16 bytes from r4. */
+ cmpdi cr7, r10, 0
+ beq cr7, L(begin2)
+ /* If r4 is unaligned, load another 16 bytes. */
+#ifdef __LITTLE_ENDIAN__
+ lvsr v7, 0, r4
+#else
+ lvsl v7, 0, r4
+#endif
+ addi r5, r4, 16
+ lvx v9, 0, r5
+#ifdef __LITTLE_ENDIAN__
+ vperm v5, v9, v5, v7
+#else
+ vperm v5, v5, v9, v7
+#endif
+L(begin2):
+ lvx v4, 0, r3
+ vcmpequb. v7, v0, v4 /* Check for null. */
+ beq cr6, L(nullchk6)
+ b L(trailcheck)
+
+ .align 4
+L(nullchk6):
+ clrldi r10, r3, 60
+ cmpdi cr7, r10, 0
+ beq cr7, L(next16)
+#ifdef __LITTLE_ENDIAN__
+ lvsr v7, 0, r3
+#else
+ lvsl v7, 0, r3
+#endif
+ addi r5, r3, 16
+ /* If r3 is unaligned, load another 16 bytes. */
+ lvx v10, 0, r5
+#ifdef __LITTLE_ENDIAN__
+ vperm v4, v10, v4, v7
+#else
+ vperm v4, v4, v10, v7
+#endif
+L(next16):
+ vcmpequb. v6, v0, v5 /* Check for null. */
+ beq cr6, L(nullchk)
+ b L(trailcheck)
+
+ .align 4
+L(nullchk):
+ vcmpequb. v6, v0, v4
+ beq cr6, L(nullchk1)
+ b L(retnull)
+
+ .align 4
+L(nullchk1):
+ /* Convert both v3 and v4 to lower. */
+ TOLOWER(v5)
+ /* If both are same, branch to match. */
+ blt cr6, L(match)
+ /* Find if the first char is present in next 15 bytes. */
+#ifdef __LITTLE_ENDIAN__
+ vspltb v6, v5, 15
+ vsldoi v7, v0, v4, 15
+#else
+ vspltb v6, v5, 0
+ vspltisb v7, 8
+ vslo v7, v4, v7
+#endif
+ vcmpequb v7, v6, v7
+ vcmpequb. v6, v0, v7
+ /* Shift r3 by 16 bytes and proceed. */
+ blt cr6, L(shift16)
+ VCLZD_V8_v7
+#ifdef __LITTLE_ENDIAN__
+ vspltb v6, v8, 15
+#else
+ vspltb v6, v8, 7
+#endif
+ vcmpequb. v6, v6, v1
+ /* Shift r3 by 8 bytes and proceed. */
+ blt cr6, L(shift8)
+ b L(begin)
+
+ .align 4
+L(match):
+ /* There is a match of 16 bytes, check next bytes. */
+ cmpdi cr7, r31, 16
+ mr r29, r3
+ beq cr7, L(ret_r3)
+
+L(secondmatch):
+ addi r3, r3, 16
+ addi r4, r4, 16
+ /* Load next 16 bytes of r3 and r4 and compare. */
+ clrldi r10, r4, 60
+ cmpdi cr7, r10, 0
+ beq cr7, L(nextload)
+ /* Handle unaligned case. */
+ vor v6, v9, v9
+ vcmpequb. v7, v0, v6
+ beq cr6, L(nullchk2)
+ b L(trailcheck)
+
+ .align 4
+L(nullchk2):
+#ifdef __LITTLE_ENDIAN__
+ lvsr v7, 0, r4
+#else
+ lvsl v7, 0, r4
+#endif
+ addi r5, r4, 16
+ /* If r4 is unaligned, load another 16 bytes. */
+ lvx v9, 0, r5
+#ifdef __LITTLE_ENDIAN__
+ vperm v11, v9, v6, v7
+#else
+ vperm v11, v6, v9, v7
+#endif
+ b L(compare)
+
+ .align 4
+L(nextload):
+ lvx v11, 0, r4
+L(compare):
+ vcmpequb. v7, v0, v11
+ beq cr6, L(nullchk3)
+ b L(trailcheck)
+
+ .align 4
+L(nullchk3):
+ clrldi r10, r3, 60
+ cmpdi cr7, r10, 0
+ beq cr7, L(nextload1)
+ /* Handle unaligned case. */
+ vor v4, v10, v10
+ vcmpequb. v7, v0, v4
+ beq cr6, L(nullchk4)
+ b L(retnull)
+
+ .align 4
+L(nullchk4):
+#ifdef __LITTLE_ENDIAN__
+ lvsr v7, 0, r3
+#else
+ lvsl v7, 0, r3
+#endif
+ addi r5, r3, 16
+ /* If r3 is unaligned, load another 16 bytes. */
+ lvx v10, 0, r5
+#ifdef __LITTLE_ENDIAN__
+ vperm v4, v10, v4, v7
+#else
+ vperm v4, v4, v10, v7
+#endif
+ b L(compare1)
+
+ .align 4
+L(nextload1):
+ lvx v4, 0, r3
+L(compare1):
+ vcmpequb. v7, v0, v4
+ beq cr6, L(nullchk5)
+ b L(retnull)
+
+ .align 4
+L(nullchk5):
+ /* Convert both v3 and v4 to lower. */
+ TOLOWER(v11)
+ /* If both are same, branch to secondmatch. */
+ blt cr6, L(secondmatch)
+ /* Continue the search. */
+ b L(begin)
+
+ .align 4
+L(trailcheck):
+ ld r10, __libc_tsd_LOCALE@got@tprel(r2)
+ add r11, r10, __libc_tsd_LOCALE@tls
+ ld r11, 0(r11)
+ ld r11, LOCALE_CTYPE_TOLOWER(r11)
+L(loop2):
+ lbz r5, 0(r3) /* Load byte from r3. */
+ lbz r6, 0(r4) /* Load next byte from r4. */
+ cmpdi cr7, r6, 0 /* Is it null? */
+ beq cr7, L(updater3)
+ cmpdi cr7, r5, 0 /* Is it null? */
+ beq cr7, L(retnull) /* If yes, return. */
+ addi r3, r3, 1
+ addi r4, r4, 1 /* Increment r4. */
+ sldi r10, r5, 2 /* Convert to lower case. */
+ lwzx r10, r11, r10
+ sldi r7, r6, 2 /* Convert to lower case. */
+ lwzx r7, r11, r7
+ cmpw cr7, r7, r10 /* Compare with byte from r4. */
+ bne cr7, L(begin)
+ b L(loop2)
+
+ .align 4
+L(shift8):
+ addi r8, r8, 7
+ b L(begin)
+ .align 4
+L(shift16):
+ addi r8, r8, 15
+ .align 4
+L(begin):
+ addi r8, r8, 1
+ mr r3, r8
+ /* When our iterations exceed ITERATIONS,fall back to default. */
+ addi r27, r27, 1
+ cmpdi cr7, r27, ITERATIONS
+ beq cr7, L(default)
+ mr r4, r30 /* Restore r4. */
+ b L(begin2)
+
+ /* Handling byte by byte. */
+ .align 4
+L(loop1):
+ mr r3, r8
+ addi r27, r27, 1
+ cmpdi cr7, r27, ITERATIONS
+ beq cr7, L(default)
+ mr r29, r8
+ srdi r4, r28, 8
+ /* Check if the first char is present. */
+ bl STRCHR
+ nop
+ mr r5, r3
+ mr r3, r29
+ mr r29, r5
+ sldi r4, r28, 56
+ srdi r4, r4, 56
+ bl STRCHR
+ nop
+ cmpdi cr7, r29, 0
+ beq cr7, L(nextpos)
+ cmpdi cr7, r3, 0
+ beq cr7, L(skipcheck1)
+ cmpw cr7, r3, r29
+ ble cr7, L(nextpos)
+ /* Move r3 to first occurence. */
+L(skipcheck1):
+ mr r3, r29
+L(nextpos):
+ mr r29, r3
+ cmpdi cr7, r3, 0
+ ble cr7, L(retnull)
+L(bytebybyte):
+ ld r10, __libc_tsd_LOCALE@got@tprel(r2)
+ add r11, r10, __libc_tsd_LOCALE@tls
+ ld r11, 0(r11)
+ ld r11, LOCALE_CTYPE_TOLOWER(r11)
+ mr r4, r30 /* Restore r4. */
+ mr r8, r3 /* Save r3. */
+ addi r8, r8, 1
+
+L(loop):
+ addi r3, r3, 1
+ lbz r5, 0(r3) /* Load byte from r3. */
+ addi r4, r4, 1 /* Increment r4. */
+ lbz r6, 0(r4) /* Load next byte from r4. */
+ cmpdi cr7, r6, 0 /* Is it null? */
+ beq cr7, L(updater3)
+ cmpdi cr7, r5, 0 /* Is it null? */
+ beq cr7, L(retnull) /* If yes, return. */
+ sldi r10, r5, 2 /* Convert to lower case. */
+ lwzx r10, r11, r10
+ sldi r7, r6, 2 /* Convert to lower case. */
+ lwzx r7, r11, r7
+ cmpw cr7, r7, r10 /* Compare with byte from r4. */
+ bne cr7, L(loop1)
+ b L(loop)
+
+ /* Handling return values. */
+ .align 4
+L(updater3):
+ subf r3, r31, r3 /* Reduce r31 (len of r4) from r3. */
+ b L(end)
+
+ .align 4
+L(ret_r3):
+ mr r3, r29 /* Return point of match. */
+ b L(end)
+
+ .align 4
+L(retnull):
+ li r3, 0 /* Substring was not found. */
+ b L(end)
+
+ .align 4
+L(default):
+ mr r4, r30
+ bl __strcasestr_ppc
+ nop
+
+ .align 4
+L(end):
+ addi r1, r1, FRAMESIZE /* Restore stack pointer. */
+ cfi_adjust_cfa_offset(-FRAMESIZE)
+ ld r0, 16(r1) /* Restore the saved link register. */
+ ld r27, -40(r1)
+ ld r28, -32(r1)
+ ld r29, -24(r1) /* Restore callers save register r29. */
+ ld r30, -16(r1) /* Restore callers save register r30. */
+ ld r31, -8(r1) /* Restore callers save register r31. */
+ cfi_restore(lr)
+ cfi_restore(r27)
+ cfi_restore(r28)
+ cfi_restore(r29)
+ cfi_restore(r30)
+ cfi_restore(r31)
+ mtlr r0 /* Branch to link register. */
+ blr
+END (strcasestr)
+libc_hidden_builtin_def (strcasestr)
--
2.1.0