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951fbcec | 1 | /* Multiple versions of memrchr |
9a1d9254 | 2 | Copyright (C) 2011, 2012 Free Software Foundation, Inc. |
951fbcec LD |
3 | Contributed by Intel Corporation. |
4 | This file is part of the GNU C Library. | |
5 | ||
6 | The GNU C Library is free software; you can redistribute it and/or | |
7 | modify it under the terms of the GNU Lesser General Public | |
8 | License as published by the Free Software Foundation; either | |
9 | version 2.1 of the License, or (at your option) any later version. | |
10 | ||
11 | The GNU C Library is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Lesser General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public | |
59ba27a6 PE |
17 | License along with the GNU C Library; if not, see |
18 | <http://www.gnu.org/licenses/>. */ | |
951fbcec LD |
19 | |
20 | #include <sysdep.h> | |
21 | #include <init-arch.h> | |
22 | ||
23 | #ifndef NOT_IN_libc | |
951fbcec LD |
24 | # define CFI_POP(REG) \ |
25 | cfi_adjust_cfa_offset (-4); \ | |
26 | cfi_restore (REG) | |
27 | ||
28 | # define CFI_PUSH(REG) \ | |
29 | cfi_adjust_cfa_offset (4); \ | |
30 | cfi_rel_offset (REG, 0) | |
31 | ||
32 | .text | |
33 | ENTRY(__memrchr) | |
34 | .type __memrchr, @gnu_indirect_function | |
35 | pushl %ebx | |
36 | CFI_PUSH (%ebx) | |
9a1d9254 | 37 | LOAD_PIC_REG(bx) |
951fbcec LD |
38 | cmpl $0, KIND_OFFSET+__cpu_features@GOTOFF(%ebx) |
39 | jne 1f | |
40 | call __init_cpu_features | |
41 | ||
42 | 1: testl $bit_SSE2, CPUID_OFFSET+index_SSE2+__cpu_features@GOTOFF(%ebx) | |
43 | jz 2f | |
44 | testl $bit_Slow_BSF, FEATURE_OFFSET+index_Slow_BSF+__cpu_features@GOTOFF(%ebx) | |
45 | jz 3f | |
46 | ||
47 | leal __memrchr_sse2@GOTOFF(%ebx), %eax | |
48 | popl %ebx | |
49 | CFI_POP (%ebx) | |
50 | ret | |
51 | ||
52 | CFI_PUSH (%ebx) | |
53 | ||
54 | 2: leal __memrchr_ia32@GOTOFF(%ebx), %eax | |
55 | popl %ebx | |
56 | CFI_POP (%ebx) | |
57 | ret | |
58 | ||
59 | CFI_PUSH (%ebx) | |
60 | ||
61 | 3: leal __memrchr_sse2_bsf@GOTOFF(%ebx), %eax | |
62 | popl %ebx | |
63 | CFI_POP (%ebx) | |
64 | ret | |
65 | END(__memrchr) | |
66 | ||
67 | weak_alias(__memrchr, memrchr) | |
68 | #endif |