projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| cd57745b UD |
1 | /* strchrnul (str, ch) -- Return pointer to first occurrence of CH in STR |
| 2 | or terminating NUL byte. | |
| 3 | For AMD x86-64. | |
| 568035b7 | 4 | Copyright (C) 2009-2013 Free Software Foundation, Inc. |
| cd57745b UD |
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/>. */ | |
| cd57745b UD |
20 | |
| 21 | #include <sysdep.h> | |
| 22 | ||
| 23 | ||
| 24 | .text | |
| 25 | ENTRY (__strchrnul) | |
| 26 | movd %esi, %xmm1 | |
| 27 | movq %rdi, %rcx | |
| 28 | punpcklbw %xmm1, %xmm1 | |
| 29 | andq $~15, %rdi | |
| 30 | pxor %xmm2, %xmm2 | |
| 31 | punpcklbw %xmm1, %xmm1 | |
| 32 | orl $0xffffffff, %esi | |
| 33 | movdqa (%rdi), %xmm0 | |
| 34 | pshufd $0, %xmm1, %xmm1 | |
| 35 | subq %rdi, %rcx | |
| 36 | movdqa %xmm0, %xmm3 | |
| 37 | leaq 16(%rdi), %rdi | |
| 38 | pcmpeqb %xmm1, %xmm0 | |
| 39 | pcmpeqb %xmm2, %xmm3 | |
| 40 | shl %cl, %esi | |
| 41 | pmovmskb %xmm0, %edx | |
| 42 | pmovmskb %xmm3, %ecx | |
| cd57745b | 43 | orl %edx, %ecx |
| 4c8b8cc3 | 44 | andl %esi, %ecx |
| cd57745b UD |
45 | jnz 1f |
| 46 | ||
| 47 | 2: movdqa (%rdi), %xmm0 | |
| 48 | leaq 16(%rdi), %rdi | |
| 49 | movdqa %xmm0, %xmm3 | |
| 50 | pcmpeqb %xmm1, %xmm0 | |
| 51 | pcmpeqb %xmm2, %xmm3 | |
| 52 | pmovmskb %xmm0, %edx | |
| 53 | pmovmskb %xmm3, %ecx | |
| 54 | orl %edx, %ecx | |
| 55 | jz 2b | |
| 56 | ||
| 57 | 1: bsfl %ecx, %edx | |
| 58 | leaq -16(%rdi,%rdx), %rax | |
| 59 | ret | |
| 60 | END (__strchrnul) | |
| 61 | ||
| 62 | weak_alias (__strchrnul, strchrnul) |