diff options
Diffstat (limited to 'sysdeps/i386/multiarch/wcslen-sse2.S')
| -rw-r--r-- | sysdeps/i386/multiarch/wcslen-sse2.S | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/sysdeps/i386/multiarch/wcslen-sse2.S b/sysdeps/i386/multiarch/wcslen-sse2.S new file mode 100644 index 0000000000..1c54b1894c --- /dev/null +++ b/sysdeps/i386/multiarch/wcslen-sse2.S @@ -0,0 +1,193 @@ +/* wcslen with SSE2 + Copyright (C) 2011-2015 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/>. */ + +#if IS_IN (libc) +# include <sysdep.h> +# define STR 4 + + .text +ENTRY (__wcslen_sse2) + mov STR(%esp), %edx + + cmp $0, (%edx) + jz L(exit_tail0) + cmp $0, 4(%edx) + jz L(exit_tail1) + cmp $0, 8(%edx) + jz L(exit_tail2) + cmp $0, 12(%edx) + jz L(exit_tail3) + cmp $0, 16(%edx) + jz L(exit_tail4) + cmp $0, 20(%edx) + jz L(exit_tail5) + cmp $0, 24(%edx) + jz L(exit_tail6) + cmp $0, 28(%edx) + jz L(exit_tail7) + + pxor %xmm0, %xmm0 + + lea 32(%edx), %eax + lea 16(%edx), %ecx + and $-16, %eax + + pcmpeqd (%eax), %xmm0 + pmovmskb %xmm0, %edx + pxor %xmm1, %xmm1 + test %edx, %edx + lea 16(%eax), %eax + jnz L(exit) + + pcmpeqd (%eax), %xmm1 + pmovmskb %xmm1, %edx + pxor %xmm2, %xmm2 + test %edx, %edx + lea 16(%eax), %eax + jnz L(exit) + + pcmpeqd (%eax), %xmm2 + pmovmskb %xmm2, %edx + pxor %xmm3, %xmm3 + test %edx, %edx + lea 16(%eax), %eax + jnz L(exit) + + pcmpeqd (%eax), %xmm3 + pmovmskb %xmm3, %edx + test %edx, %edx + lea 16(%eax), %eax + jnz L(exit) + + and $-0x40, %eax + + .p2align 4 +L(aligned_64_loop): + movaps (%eax), %xmm0 + movaps 16(%eax), %xmm1 + movaps 32(%eax), %xmm2 + movaps 48(%eax), %xmm6 + + pminub %xmm1, %xmm0 + pminub %xmm6, %xmm2 + pminub %xmm0, %xmm2 + pcmpeqd %xmm3, %xmm2 + pmovmskb %xmm2, %edx + test %edx, %edx + lea 64(%eax), %eax + jz L(aligned_64_loop) + + pcmpeqd -64(%eax), %xmm3 + pmovmskb %xmm3, %edx + test %edx, %edx + lea 48(%ecx), %ecx + jnz L(exit) + + pcmpeqd %xmm1, %xmm3 + pmovmskb %xmm3, %edx + test %edx, %edx + lea -16(%ecx), %ecx + jnz L(exit) + + pcmpeqd -32(%eax), %xmm3 + pmovmskb %xmm3, %edx + test %edx, %edx + lea -16(%ecx), %ecx + jnz L(exit) + + pcmpeqd %xmm6, %xmm3 + pmovmskb %xmm3, %edx + test %edx, %edx + lea -16(%ecx), %ecx + jnz L(exit) + + jmp L(aligned_64_loop) + + .p2align 4 +L(exit): + sub %ecx, %eax + shr $2, %eax + test %dl, %dl + jz L(exit_high) + + mov %dl, %cl + and $15, %cl + jz L(exit_1) + ret + + .p2align 4 +L(exit_high): + mov %dh, %ch + and $15, %ch + jz L(exit_3) + add $2, %eax + ret + + .p2align 4 +L(exit_1): + add $1, %eax + ret + + .p2align 4 +L(exit_3): + add $3, %eax + ret + + .p2align 4 +L(exit_tail0): + xor %eax, %eax + ret + + .p2align 4 +L(exit_tail1): + mov $1, %eax + ret + + .p2align 4 +L(exit_tail2): + mov $2, %eax + ret + + .p2align 4 +L(exit_tail3): + mov $3, %eax + ret + + .p2align 4 +L(exit_tail4): + mov $4, %eax + ret + + .p2align 4 +L(exit_tail5): + mov $5, %eax + ret + + .p2align 4 +L(exit_tail6): + mov $6, %eax + ret + + .p2align 4 +L(exit_tail7): + mov $7, %eax + ret + +END (__wcslen_sse2) +#endif |