| /* wcschr with SSSE3 |
| Copyright (C) 2011-2018 Free Software Foundation, Inc. |
| Contributed by Intel Corporation. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <sysdep.h> |
| |
| .text |
| ENTRY (__wcschr) |
| |
| movd %rsi, %xmm1 |
| pxor %xmm2, %xmm2 |
| mov %rdi, %rcx |
| punpckldq %xmm1, %xmm1 |
| punpckldq %xmm1, %xmm1 |
| |
| and $63, %rcx |
| cmp $48, %rcx |
| ja L(cross_cache) |
| |
| movdqu (%rdi), %xmm0 |
| pcmpeqd %xmm0, %xmm2 |
| add $16, %rdi |
| pcmpeqd %xmm1, %xmm0 |
| pmovmskb %xmm2, %rdx |
| pmovmskb %xmm0, %rax |
| or %rax, %rdx |
| jnz L(matches) |
| |
| and $-16, %rdi |
| |
| movdqa (%rdi), %xmm0 |
| pcmpeqd %xmm0, %xmm2 |
| add $16, %rdi |
| pcmpeqd %xmm1, %xmm0 |
| pmovmskb %xmm2, %rdx |
| pmovmskb %xmm0, %rax |
| or %rax, %rdx |
| jnz L(matches) |
| |
| jmp L(loop) |
| |
| L(cross_cache): |
| and $15, %rcx |
| and $-16, %rdi |
| movdqa (%rdi), %xmm0 |
| pcmpeqd %xmm0, %xmm2 |
| pcmpeqd %xmm1, %xmm0 |
| pmovmskb %xmm2, %rdx |
| pmovmskb %xmm0, %rax |
| |
| sar %cl, %rdx |
| sar %cl, %rax |
| test %rax, %rax |
| je L(unaligned_no_match) |
| |
| bsf %rax, %rax |
| test %rdx, %rdx |
| je L(unaligned_match) |
| bsf %rdx, %rdx |
| cmp %rdx, %rax |
| ja L(return_null) |
| |
| L(unaligned_match): |
| add %rdi, %rax |
| add %rcx, %rax |
| ret |
| |
| .p2align 4 |
| L(unaligned_no_match): |
| test %rdx, %rdx |
| jne L(return_null) |
| pxor %xmm2, %xmm2 |
| |
| add $16, %rdi |
| |
| .p2align 4 |
| /* Loop start on aligned string. */ |
| L(loop): |
| movdqa (%rdi), %xmm0 |
| pcmpeqd %xmm0, %xmm2 |
| add $16, %rdi |
| pcmpeqd %xmm1, %xmm0 |
| pmovmskb %xmm2, %rdx |
| pmovmskb %xmm0, %rax |
| or %rax, %rdx |
| jnz L(matches) |
| |
| movdqa (%rdi), %xmm0 |
| pcmpeqd %xmm0, %xmm2 |
| add $16, %rdi |
| pcmpeqd %xmm1, %xmm0 |
| pmovmskb %xmm2, %rdx |
| pmovmskb %xmm0, %rax |
| or %rax, %rdx |
| jnz L(matches) |
| |
| movdqa (%rdi), %xmm0 |
| pcmpeqd %xmm0, %xmm2 |
| add $16, %rdi |
| pcmpeqd %xmm1, %xmm0 |
| pmovmskb %xmm2, %rdx |
| pmovmskb %xmm0, %rax |
| or %rax, %rdx |
| jnz L(matches) |
| |
| movdqa (%rdi), %xmm0 |
| pcmpeqd %xmm0, %xmm2 |
| add $16, %rdi |
| pcmpeqd %xmm1, %xmm0 |
| pmovmskb %xmm2, %rdx |
| pmovmskb %xmm0, %rax |
| or %rax, %rdx |
| jnz L(matches) |
| jmp L(loop) |
| |
| .p2align 4 |
| L(matches): |
| pmovmskb %xmm2, %rdx |
| test %rax, %rax |
| jz L(return_null) |
| bsf %rax, %rax |
| test %rdx, %rdx |
| je L(match) |
| bsf %rdx, %rcx |
| cmp %rcx, %rax |
| ja L(return_null) |
| L(match): |
| sub $16, %rdi |
| add %rdi, %rax |
| ret |
| |
| .p2align 4 |
| L(return_null): |
| xor %rax, %rax |
| ret |
| |
| END (__wcschr) |
| |
| libc_hidden_def(__wcschr) |
| weak_alias (__wcschr, wcschr) |
| libc_hidden_weak (wcschr) |