projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 951fbcec | 1 | /* Multiple versions of memchr |
| b090e8ea | 2 | All versions must be listed in ifunc-impl-list.c. |
| d4697bc9 | 3 | Copyright (C) 2011-2014 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(__memchr) | |
| 35 | .type __memchr, @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 __memchr_sse2@GOTOFF(%ebx), %eax | |
| 49 | popl %ebx | |
| 50 | CFI_POP (%ebx) | |
| 51 | ret | |
| 52 | ||
| 53 | CFI_PUSH (%ebx) | |
| 54 | ||
| 55 | 2: leal __memchr_ia32@GOTOFF(%ebx), %eax | |
| 56 | popl %ebx | |
| 57 | CFI_POP (%ebx) | |
| 58 | ret | |
| 59 | ||
| 60 | CFI_PUSH (%ebx) | |
| 61 | ||
| 62 | 3: leal __memchr_sse2_bsf@GOTOFF(%ebx), %eax | |
| 63 | popl %ebx | |
| 64 | CFI_POP (%ebx) | |
| 65 | ret | |
| 66 | END(__memchr) | |
| 67 | ||
| 68 | weak_alias(__memchr, memchr) | |
| 69 | ||
| 70 | # undef ENTRY | |
| 71 | # define ENTRY(name) \ | |
| 72 | .type __memchr_ia32, @function; \ | |
| 73 | .globl __memchr_ia32; \ | |
| 74 | .p2align 4; \ | |
| 75 | __memchr_ia32: cfi_startproc; \ | |
| 76 | CALL_MCOUNT | |
| 77 | # undef END | |
| 78 | # define END(name) \ | |
| 79 | cfi_endproc; .size __memchr_ia32, .-__memchr_ia32 | |
| 80 | ||
| 81 | # undef libc_hidden_builtin_def | |
| 82 | /* IFUNC doesn't work with the hidden functions in shared library since | |
| 83 | they will be called without setting up EBX needed for PLT which is | |
| 84 | used by IFUNC. */ | |
| 85 | # define libc_hidden_builtin_def(name) \ | |
| 86 | .globl __GI_memchr; __GI_memchr = __memchr_ia32 | |
| 87 | ||
| 88 | #endif | |
| 89 | #include "../../memchr.S" |