1 /* Multiple versions of memcpy
2 All versions must be listed in ifunc-impl-list.c.
3 Copyright (C) 2010-2015 Free Software Foundation, Inc.
4 Contributed by Intel Corporation.
5 This file is part of the GNU C Library.
7 The GNU C Library is free software; you can redistribute it and/or
8 modify it under the terms of the GNU Lesser General Public
9 License as published by the Free Software Foundation; either
10 version 2.1 of the License, or (at your option) any later version.
12 The GNU C Library is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Lesser General Public License for more details.
17 You should have received a copy of the GNU Lesser General Public
18 License along with the GNU C Library; if not, see
19 <http://www.gnu.org/licenses/>. */
22 #include <init-arch.h>
24 /* Define multiple versions only for the definition in lib and for
25 DSO. In static binaries we need memcpy before the initialization
27 #if defined SHARED && IS_IN (libc)
30 .type memcpy, @gnu_indirect_function
32 cfi_adjust_cfa_offset (4)
33 cfi_rel_offset (ebx, 0)
35 cmpl $0, KIND_OFFSET+__cpu_features@GOTOFF(%ebx)
37 call __init_cpu_features
38 1: leal __memcpy_ia32@GOTOFF(%ebx), %eax
39 testl $bit_SSE2, CPUID_OFFSET+index_SSE2+__cpu_features@GOTOFF(%ebx)
41 leal __memcpy_sse2_unaligned@GOTOFF(%ebx), %eax
42 testl $bit_Fast_Unaligned_Load, FEATURE_OFFSET+index_Fast_Unaligned_Load+__cpu_features@GOTOFF(%ebx)
44 testl $bit_SSSE3, CPUID_OFFSET+index_SSSE3+__cpu_features@GOTOFF(%ebx)
46 leal __memcpy_ssse3@GOTOFF(%ebx), %eax
47 testl $bit_Fast_Rep_String, FEATURE_OFFSET+index_Fast_Rep_String+__cpu_features@GOTOFF(%ebx)
49 leal __memcpy_ssse3_rep@GOTOFF(%ebx), %eax
51 cfi_adjust_cfa_offset (-4)
57 # define ENTRY(name) \
58 .type __memcpy_ia32, @function; \
60 .globl __memcpy_ia32; \
61 .hidden __memcpy_ia32; \
62 __memcpy_ia32: cfi_startproc; \
66 cfi_endproc; .size __memcpy_ia32, .-__memcpy_ia32
69 # define ENTRY_CHK(name) \
70 .type __memcpy_chk_ia32, @function; \
71 .globl __memcpy_chk_ia32; \
73 __memcpy_chk_ia32: cfi_startproc; \
76 # define END_CHK(name) \
77 cfi_endproc; .size __memcpy_chk_ia32, .-__memcpy_chk_ia32
79 # undef libc_hidden_builtin_def
80 /* IFUNC doesn't work with the hidden functions in shared library since
81 they will be called without setting up EBX needed for PLT which is
83 # define libc_hidden_builtin_def(name) \
84 .globl __GI_memcpy; __GI_memcpy = __memcpy_ia32
87 #include "../memcpy.S"