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-rw-r--r--sysdeps/i386/i686/multiarch/memcpy.S90
1 files changed, 90 insertions, 0 deletions
diff --git a/sysdeps/i386/i686/multiarch/memcpy.S b/sysdeps/i386/i686/multiarch/memcpy.S
new file mode 100644
index 0000000000..bf1c7cc2d2
--- /dev/null
+++ b/sysdeps/i386/i686/multiarch/memcpy.S
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+/* Multiple versions of memcpy
+ Copyright (C) 2010 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 <sysdep.h>
+#include <init-arch.h>
+
+/* Define multiple versions only for the definition in lib and for
+ DSO. In static binaries we need memcpy before the initialization
+ happened. */
+#if defined SHARED && !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(memcpy)
+ .type memcpy, @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 __memcpy_ia32@GOTOFF(%ebx), %eax
+ testl $bit_SSSE3, CPUID_OFFSET+index_SSSE3+__cpu_features@GOTOFF(%ebx)
+ jz 2f
+ leal __memcpy_ssse3@GOTOFF(%ebx), %eax
+ testl $bit_Fast_Rep_String, FEATURE_OFFSET+index_Fast_Rep_String+__cpu_features@GOTOFF(%ebx)
+ jz 2f
+ leal __memcpy_ssse3_rep@GOTOFF(%ebx), %eax
+2: popl %ebx
+ cfi_adjust_cfa_offset (-4)
+ cfi_restore (ebx)
+ ret
+END(memcpy)
+
+# undef ENTRY
+# define ENTRY(name) \
+ .type __memcpy_ia32, @function; \
+ .p2align 4; \
+ __memcpy_ia32: cfi_startproc; \
+ CALL_MCOUNT
+# undef END
+# define END(name) \
+ cfi_endproc; .size __memcpy_ia32, .-__memcpy_ia32
+
+# undef ENTRY_CHK
+# define ENTRY_CHK(name) \
+ .type __memcpy_chk_ia32, @function; \
+ .globl __memcpy_chk_ia32; \
+ .p2align 4; \
+ __memcpy_chk_ia32: cfi_startproc; \
+ CALL_MCOUNT
+# undef END_CHK
+# define END_CHK(name) \
+ cfi_endproc; .size __memcpy_chk_ia32, .-__memcpy_chk_ia32
+
+# undef libc_hidden_builtin_def
+/* IFUNC doesn't work with the hidden functions in shared library since
+ they will be called without setting up EBX needed for PLT which is
+ used by IFUNC. */
+# define libc_hidden_builtin_def(name) \
+ .globl __GI_memcpy; __GI_memcpy = __memcpy_ia32
+#endif
+
+#include "../memcpy.S"