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951fbcec | 1 | /* Multiple versions of memrchr |
b090e8ea | 2 | All versions must be listed in ifunc-impl-list.c. |
9a1d9254 | 3 | Copyright (C) 2011, 2012 Free Software Foundation, Inc. |
951fbcec LD |
4 | Contributed by Intel Corporation. |
5 | This file is part of the GNU C Library. | |
6 | ||
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. | |
11 | ||
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. | |
16 | ||
17 | You should have received a copy of the GNU Lesser General Public | |
59ba27a6 PE |
18 | License along with the GNU C Library; if not, see |
19 | <http://www.gnu.org/licenses/>. */ | |
951fbcec LD |
20 | |
21 | #include <sysdep.h> | |
22 | #include <init-arch.h> | |
23 | ||
24 | #ifndef NOT_IN_libc | |
951fbcec LD |
25 | # define CFI_POP(REG) \ |
26 | cfi_adjust_cfa_offset (-4); \ | |
27 | cfi_restore (REG) | |
28 | ||
29 | # define CFI_PUSH(REG) \ | |
30 | cfi_adjust_cfa_offset (4); \ | |
31 | cfi_rel_offset (REG, 0) | |
32 | ||
33 | .text | |
34 | ENTRY(__memrchr) | |
35 | .type __memrchr, @gnu_indirect_function | |
36 | pushl %ebx | |
37 | CFI_PUSH (%ebx) | |
9a1d9254 | 38 | LOAD_PIC_REG(bx) |
951fbcec LD |
39 | cmpl $0, KIND_OFFSET+__cpu_features@GOTOFF(%ebx) |
40 | jne 1f | |
41 | call __init_cpu_features | |
42 | ||
43 | 1: testl $bit_SSE2, CPUID_OFFSET+index_SSE2+__cpu_features@GOTOFF(%ebx) | |
44 | jz 2f | |
45 | testl $bit_Slow_BSF, FEATURE_OFFSET+index_Slow_BSF+__cpu_features@GOTOFF(%ebx) | |
46 | jz 3f | |
47 | ||
48 | leal __memrchr_sse2@GOTOFF(%ebx), %eax | |
49 | popl %ebx | |
50 | CFI_POP (%ebx) | |
51 | ret | |
52 | ||
53 | CFI_PUSH (%ebx) | |
54 | ||
55 | 2: leal __memrchr_ia32@GOTOFF(%ebx), %eax | |
56 | popl %ebx | |
57 | CFI_POP (%ebx) | |
58 | ret | |
59 | ||
60 | CFI_PUSH (%ebx) | |
61 | ||
62 | 3: leal __memrchr_sse2_bsf@GOTOFF(%ebx), %eax | |
63 | popl %ebx | |
64 | CFI_POP (%ebx) | |
65 | ret | |
66 | END(__memrchr) | |
67 | ||
68 | weak_alias(__memrchr, memrchr) | |
69 | #endif |