PowerPC: strchr ifunc for PPC32

diff --git a/sysdeps/powerpc/powerpc32/multiarch/Makefile b/sysdeps/powerpc/powerpc32/multiarch/Makefile
index fbf298af0fffc483326bb39784e9f683e147a4a0..c3a3c58dde115c4cd0b462e6794c715f141bfca5 100644 (file)
--- a/sysdeps/powerpc/powerpc32/multiarch/Makefile
+++ b/sysdeps/powerpc/powerpc32/multiarch/Makefile
@@ -5,6 +5,7 @@ sysdep_routines += memcpy-power7 memcpy-a2 memcpy-power6 memcpy-cell \
                   strncmp-power7 strncmp-power4 strlen-power7 \
                    strcasecmp-power7 strcasecmp_l-power7 \
                   strnlen-power7 strnlen-c \
+                  strchr-power7 \
                   mempcpy-power7 mempcpy-c \
                   memchr-power7 memchr-c \
                   memrchr-power7 memrchr-c \

diff --git a/sysdeps/powerpc/powerpc32/multiarch/ifunc-impl-list.c b/sysdeps/powerpc/powerpc32/multiarch/ifunc-impl-list.c
index 1399548b67cfefdca1925def5989e147cdbb90d1..faeef4a91c5edfb732d55ddccbd2f584afe759f7 100644 (file)
--- a/sysdeps/powerpc/powerpc32/multiarch/ifunc-impl-list.c
+++ b/sysdeps/powerpc/powerpc32/multiarch/ifunc-impl-list.c
@@ -142,6 +142,13 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
              IFUNC_IMPL_ADD (array, i, strnlen, 1,
                              __strnlen_ppc32))
 
+  IFUNC_IMPL (i, name, strchr,
+             IFUNC_IMPL_ADD (array, i, strchr,
+                             hwcap & PPC_FEATURE_HAS_VSX,
+                             __strchr_power7)
+             IFUNC_IMPL_ADD (array, i, strchr, 1,
+                             __strchr_ppc32))
+
   IFUNC_IMPL (i, name, strchrnul,
              IFUNC_IMPL_ADD (array, i, strchrnul,
                              hwcap & PPC_FEATURE_HAS_VSX,

diff --git a/sysdeps/powerpc/powerpc32/multiarch/rtld-strchr.S b/sysdeps/powerpc/powerpc32/multiarch/rtld-strchr.S
new file mode 100644 (file)
index 0000000..d969c0a
--- /dev/null
+++ b/sysdeps/powerpc/powerpc32/multiarch/rtld-strchr.S
@@ -0,0 +1 @@
+#include "../strchr.S"

diff --git a/sysdeps/powerpc/powerpc32/power7/strchr.S b/sysdeps/powerpc/powerpc32/multiarch/strchr-power7.S
similarity index 98%
rename from sysdeps/powerpc/powerpc32/power7/strchr.S
rename to sysdeps/powerpc/powerpc32/multiarch/strchr-power7.S
index 0ecadb271adba0a75ef498f5035fccacfdf40799..32bc5bb74659655f2ca2aac53e85a9c762e24907 100644 (file)
--- a/sysdeps/powerpc/powerpc32/power7/strchr.S
+++ b/sysdeps/powerpc/powerpc32/multiarch/strchr-power7.S
@@ -21,7 +21,7 @@
 
 /* int [r3] strchr (char *s [r3], int c [r4])  */
        .machine  power7
-ENTRY (strchr)
+ENTRY (__strchr_power7)
        CALL_MCOUNT
        dcbt    0,r3
        clrrwi  r8,r3,2       /* Align the address to word boundary.  */
@@ -195,6 +195,4 @@ L(done_null):
        srwi    r0,r0,3       /* Convert leading zeros to bytes.  */
        add     r3,r8,r0      /* Return address of the matching null byte.  */
        blr
-END (strchr)
-weak_alias (strchr, index)
-libc_hidden_builtin_def (strchr)
+END (__strchr_power7)

diff --git a/sysdeps/powerpc/powerpc32/multiarch/strchr.S b/sysdeps/powerpc/powerpc32/multiarch/strchr.S
new file mode 100644 (file)
index 0000000..08f0d90
--- /dev/null
+++ b/sysdeps/powerpc/powerpc32/multiarch/strchr.S
@@ -0,0 +1,82 @@
+/* Optimized strchr implementation for PowerPC32.
+   Copyright (C) 2013 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 <rtld-global-offsets.h>
+
+/* Define multiple versions only for the definition in libc.  */
+#if defined SHARED && !defined NOT_IN_libc
+       .text
+ENTRY(strchr)
+       .type   strchr, @gnu_indirect_function
+# ifdef PIC
+       mflr    r11
+       cfi_register (lr,r11)
+       bcl     20,31,1f
+1:     mflr    r5
+       addis   r5,r5,_GLOBAL_OFFSET_TABLE_-1b@ha
+       addi    r5,r5,_GLOBAL_OFFSET_TABLE_-1b@l
+       lwz     r6,_rtld_global_ro@got(r5)
+       mtlr    r11
+       cfi_same_value (lr)
+       lwz     r6,RTLD_GLOBAL_RO_DL_HWCAP_OFFSET+4(r6)
+# else
+       lis     r6,(_dl_hwcap+4)@ha
+       lwz     r6,(_dl_hwcap+4)@l(r6)
+# endif
+       /* r5 - got pointer | r6 - _dl_hwcap */
+       andi.   r7,r6,PPC_FEATURE_HAS_VSX
+       bne-    L(power7)
+# ifdef PIC
+       lwz     r3,__strchr_ppc32@got(r5)
+# else
+       lis     r3,__strchr_ppc32@ha
+       lwz     r3,__strchr_ppc32@l(r3)
+# endif
+       blr
+L(power7):
+# ifdef PIC
+       lwz     r3,__strchr_power7@got(r5)
+# else
+       lis     r3,__strchr_power7@ha
+       lwz     r3,__strchr_power7@l(r3)
+# endif
+       blr
+END(strchr)
+
+# undef ENTRY
+# define ENTRY(name)                                           \
+  .globl C_SYMBOL_NAME(__strchr_ppc32);                                \
+  .type C_SYMBOL_NAME(__strchr_ppc32),@function;               \
+  .align ALIGNARG(2);                                          \
+  C_LABEL(__strchr_ppc32)                                      \
+  cfi_startproc;                                               \
+  CALL_MCOUNT
+
+# undef END
+# define END(name)                                             \
+  cfi_endproc;                                                 \
+  ASM_SIZE_DIRECTIVE(__strchr_ppc32)                           \
+
+# undef libc_hidden_builtin_def
+# define libc_hidden_builtin_def(name)                         \
+  .globl __GI_strchr; __GI_strchr = __strchr_ppc32
+
+#endif
+
+#include "../strchr.S"