diff options
Diffstat (limited to 'REORG.TODO/sysdeps/x86_64/wcschr.S')
| -rw-r--r-- | REORG.TODO/sysdeps/x86_64/wcschr.S | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/x86_64/wcschr.S b/REORG.TODO/sysdeps/x86_64/wcschr.S new file mode 100644 index 0000000000..a3e7d67dec --- /dev/null +++ b/REORG.TODO/sysdeps/x86_64/wcschr.S @@ -0,0 +1,156 @@ +/* wcschr with SSSE3 + Copyright (C) 2011-2017 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) |