From a7f4cf5f1a6c0c9011c8dc0339cbe860fd272b6c Mon Sep 17 00:00:00 2001 From: H.J. Lu Date: Wed, 14 Apr 2010 00:12:53 -0700 Subject: [PATCH] x86-64 SSE4 optimized memcmp This is 64bit SSE4 optimized memcmp. It improves memcmp by upto 3X on Intel Core i7. --- ChangeLog.x86 | 8 + sysdeps/x86_64/multiarch/Makefile | 2 +- sysdeps/x86_64/multiarch/memcmp-sse4.S | 1270 ++++++++++++++++++++++++++++++++ sysdeps/x86_64/multiarch/memcmp.S | 59 ++ sysdeps/x86_64/multiarch/rtld-memcmp.c | 1 + 5 files changed, 1339 insertions(+), 1 deletions(-) create mode 100644 sysdeps/x86_64/multiarch/memcmp-sse4.S create mode 100644 sysdeps/x86_64/multiarch/memcmp.S create mode 100644 sysdeps/x86_64/multiarch/rtld-memcmp.c 2010-04-12 H.J. Lu * sysdeps/x86_64/multiarch/Makefile (sysdep_routines): Add memcmp-sse4. * sysdeps/x86_64/multiarch/memcmp-sse4.S: New file. * sysdeps/x86_64/multiarch/memcmp.S: New file. * sysdeps/x86_64/multiarch/rtld-memcmp.c: New file. diff --git a/sysdeps/x86_64/multiarch/Makefile b/sysdeps/x86_64/multiarch/Makefile index 364e7bb..c61cf70 100644 --- a/sysdeps/x86_64/multiarch/Makefile +++ b/sysdeps/x86_64/multiarch/Makefile @@ -5,7 +5,7 @@ endif ifeq ($(subdir),string) sysdep_routines += stpncpy-c strncpy-c strcmp-ssse3 strncmp-ssse3 \ - strend-sse4 + strend-sse4 memcmp-sse4 ifeq (yes,$(config-cflags-sse4)) sysdep_routines += strcspn-c strpbrk-c strspn-c strstr-c strcasestr-c CFLAGS-strcspn-c.c += -msse4 diff --git a/sysdeps/x86_64/multiarch/memcmp-sse4.S b/sysdeps/x86_64/multiarch/memcmp-sse4.S new file mode 100644 index 0000000..886c893 --- /dev/null +++ b/sysdeps/x86_64/multiarch/memcmp-sse4.S @@ -0,0 +1,1270 @@ +/* memcmp with SSE4.1 + Copyright (C) 2010 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#ifndef NOT_IN_libc + +#include +#include "asm-syntax.h" + +#ifndef MEMCMP +# define MEMCMP __memcmp_sse4_1 +#endif + +#ifndef ALIGN +# define ALIGN(n) .p2align n +#endif + +#define JMPTBL(I, B) (I - B) + +#define BRANCH_TO_JMPTBL_ENTRY(TABLE, INDEX, SCALE) \ + lea TABLE(%rip), %r11; \ + movslq (%r11, INDEX, SCALE), %rcx; \ + add %r11, %rcx; \ + jmp *%rcx; \ + ud2 + + .section .text.sse4.1,"ax",@progbits +ENTRY (MEMCMP) + pxor %xmm0, %xmm0 + cmp $79, %rdx + ja L(79bytesormore) + cmp $1, %rdx + je L(firstbyte) + add %rdx, %rsi + add %rdx, %rdi + BRANCH_TO_JMPTBL_ENTRY(L(table_64bytes), %rdx, 4) + + ALIGN (4) +L(firstbyte): + movzbl (%rdi), %eax + movzbl (%rsi), %ecx + sub %ecx, %eax + ret + + ALIGN (4) +L(79bytesormore): + movdqu (%rsi), %xmm1 + movdqu (%rdi), %xmm2 + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(16bytesin256) + mov %rsi, %rcx + and $-16, %rsi + add $16, %rsi + sub %rsi, %rcx + + sub %rcx, %rdi + add %rcx, %rdx + + cmp $128, %rdx + ja L(128bytesormore) +L(less128bytes): + sub $64, %rdx + + movdqu (%rdi), %xmm2 + pxor (%rsi), %xmm2 + ptest %xmm2, %xmm0 + jnc L(16bytesin256) + + movdqu 16(%rdi), %xmm2 + pxor 16(%rsi), %xmm2 + ptest %xmm2, %xmm0 + jnc L(32bytesin256) + + movdqu 32(%rdi), %xmm2 + pxor 32(%rsi), %xmm2 + ptest %xmm2, %xmm0 + jnc L(48bytesin256) + + movdqu 48(%rdi), %xmm2 + pxor 48(%rsi), %xmm2 + ptest %xmm2, %xmm0 + jnc L(64bytesin256) + cmp $32, %rdx + jb L(less32bytesin64) + + movdqu 64(%rdi), %xmm2 + pxor 64(%rsi), %xmm2 + ptest %xmm2, %xmm0 + jnc L(80bytesin256) + + movdqu 80(%rdi), %xmm2 + pxor 80(%rsi), %xmm2 + ptest %xmm2, %xmm0 + jnc L(96bytesin256) + sub $32, %rdx + add $32, %rdi + add $32, %rsi +L(less32bytesin64): + add $64, %rdi + add $64, %rsi + add %rdx, %rsi + add %rdx, %rdi + BRANCH_TO_JMPTBL_ENTRY(L(table_64bytes), %rdx, 4) + +L(128bytesormore): + cmp $256, %rdx + ja L(256bytesormore) +L(less256bytes): + sub $128, %rdx + + movdqu (%rdi), %xmm2 + pxor (%rsi), %xmm2 + ptest %xmm2, %xmm0 + jnc L(16bytesin256) + + movdqu 16(%rdi), %xmm2 + pxor 16(%rsi), %xmm2 + ptest %xmm2, %xmm0 + jnc L(32bytesin256) + + movdqu 32(%rdi), %xmm2 + pxor 32(%rsi), %xmm2 + ptest %xmm2, %xmm0 + jnc L(48bytesin256) + + movdqu 48(%rdi), %xmm2 + pxor 48(%rsi), %xmm2 + ptest %xmm2, %xmm0 + jnc L(64bytesin256) + + movdqu 64(%rdi), %xmm2 + pxor 64(%rsi), %xmm2 + ptest %xmm2, %xmm0 + jnc L(80bytesin256) + + movdqu 80(%rdi), %xmm2 + pxor 80(%rsi), %xmm2 + ptest %xmm2, %xmm0 + jnc L(96bytesin256) + + movdqu 96(%rdi), %xmm2 + pxor 96(%rsi), %xmm2 + ptest %xmm2, %xmm0 + jnc L(112bytesin256) + + movdqu 112(%rdi), %xmm2 + pxor 112(%rsi), %xmm2 + ptest %xmm2, %xmm0 + jnc L(128bytesin256) + + add $128, %rsi + add $128, %rdi + + cmp $64, %rdx + jae L(less128bytes) + + cmp $32, %rdx + jb L(less32bytesin128) + + movdqu (%rdi), %xmm2 + pxor (%rsi), %xmm2 + ptest %xmm2, %xmm0 + jnc L(16bytesin256) + + movdqu 16(%rdi), %xmm2 + pxor 16(%rsi), %xmm2 + ptest %xmm2, %xmm0 + jnc L(32bytesin256) + sub $32, %rdx + add $32, %rdi + add $32, %rsi +L(less32bytesin128): + add %rdx, %rsi + add %rdx, %rdi + BRANCH_TO_JMPTBL_ENTRY(L(table_64bytes), %rdx, 4) + +L(256bytesormore): + cmp $512, %rdx + ja L(512bytesormore) +L(less512bytes): + sub $256, %rdx + movdqu (%rdi), %xmm2 + pxor (%rsi), %xmm2 + ptest %xmm2, %xmm0 + jnc L(16bytesin256) + + movdqu 16(%rdi), %xmm2 + pxor 16(%rsi), %xmm2 + ptest %xmm2, %xmm0 + jnc L(32bytesin256) + + movdqu 32(%rdi), %xmm2 + pxor 32(%rsi), %xmm2 + ptest %xmm2, %xmm0 + jnc L(48bytesin256) + + movdqu 48(%rdi), %xmm2 + pxor 48(%rsi), %xmm2 + ptest %xmm2, %xmm0 + jnc L(64bytesin256) + + movdqu 64(%rdi), %xmm2 + pxor 64(%rsi), %xmm2 + ptest %xmm2, %xmm0 + jnc L(80bytesin256) + + movdqu 80(%rdi), %xmm2 + pxor 80(%rsi), %xmm2 + ptest %xmm2, %xmm0 + jnc L(96bytesin256) + + movdqu 96(%rdi), %xmm2 + pxor 96(%rsi), %xmm2 + ptest %xmm2, %xmm0 + jnc L(112bytesin256) + + movdqu 112(%rdi), %xmm2 + pxor 112(%rsi), %xmm2 + ptest %xmm2, %xmm0 + jnc L(128bytesin256) + + movdqu 128(%rdi), %xmm2 + pxor 128(%rsi), %xmm2 + ptest %xmm2, %xmm0 + jnc L(144bytesin256) + + movdqu 144(%rdi), %xmm2 + pxor 144(%rsi), %xmm2 + ptest %xmm2, %xmm0 + jnc L(160bytesin256) + + movdqu 160(%rdi), %xmm2 + pxor 160(%rsi), %xmm2 + ptest %xmm2, %xmm0 + jnc L(176bytesin256) + + movdqu 176(%rdi), %xmm2 + pxor 176(%rsi), %xmm2 + ptest %xmm2, %xmm0 + jnc L(192bytesin256) + + movdqu 192(%rdi), %xmm2 + pxor 192(%rsi), %xmm2 + ptest %xmm2, %xmm0 + jnc L(208bytesin256) + + movdqu 208(%rdi), %xmm2 + pxor 208(%rsi), %xmm2 + ptest %xmm2, %xmm0 + jnc L(224bytesin256) + + movdqu 224(%rdi), %xmm2 + pxor 224(%rsi), %xmm2 + ptest %xmm2, %xmm0 + jnc L(240bytesin256) + + movdqu 240(%rdi), %xmm2 + pxor 240(%rsi), %xmm2 + ptest %xmm2, %xmm0 + jnc L(256bytesin256) + + add $256, %rsi + add $256, %rdi + + cmp $128, %rdx + jae L(less256bytes) + + cmp $64, %rdx + jae L(less128bytes) + + cmp $32, %rdx + jb L(less32bytesin256) + + movdqu (%rdi), %xmm2 + pxor (%rsi), %xmm2 + ptest %xmm2, %xmm0 + jnc L(16bytesin256) + + movdqu 16(%rdi), %xmm2 + pxor 16(%rsi), %xmm2 + ptest %xmm2, %xmm0 + jnc L(32bytesin256) + sub $32, %rdx + add $32, %rdi + add $32, %rsi +L(less32bytesin256): + add %rdx, %rsi + add %rdx, %rdi + BRANCH_TO_JMPTBL_ENTRY(L(table_64bytes), %rdx, 4) + + ALIGN (4) +L(512bytesormore): + sub $64, %rdx +L(64bytesormore_loop): + movdqu (%rdi), %xmm2 + pxor (%rsi), %xmm2 + movdqa %xmm2, %xmm1 + + movdqu 16(%rdi), %xmm3 + pxor 16(%rsi), %xmm3 + por %xmm3, %xmm1 + + movdqu 32(%rdi), %xmm4 + pxor 32(%rsi), %xmm4 + por %xmm4, %xmm1 + + movdqu 48(%rdi), %xmm5 + pxor 48(%rsi), %xmm5 + por %xmm5, %xmm1 + + ptest %xmm1, %xmm0 + jnc L(64bytesormore_loop_end) + add $64, %rsi + add $64, %rdi + sub $64, %rdx + jae L(64bytesormore_loop) + + add $64, %rdx + add %rdx, %rsi + add %rdx, %rdi + BRANCH_TO_JMPTBL_ENTRY(L(table_64bytes), %rdx, 4) + + ALIGN (4) +L(64bytesormore_loop_end): + add $16, %rdi + add $16, %rsi + ptest %xmm2, %xmm0 + jnc L(16bytes) + + add $16, %rdi + add $16, %rsi + ptest %xmm3, %xmm0 + jnc L(16bytes) + + add $16, %rdi + add $16, %rsi + ptest %xmm4, %xmm0 + jnc L(16bytes) + + add $16, %rdi + add $16, %rsi + jmp L(16bytes) + +L(256bytesin256): + add $256, %rdi + add $256, %rsi + jmp L(16bytes) +L(240bytesin256): + add $240, %rdi + add $240, %rsi + jmp L(16bytes) +L(224bytesin256): + add $224, %rdi + add $224, %rsi + jmp L(16bytes) +L(208bytesin256): + add $208, %rdi + add $208, %rsi + jmp L(16bytes) +L(192bytesin256): + add $192, %rdi + add $192, %rsi + jmp L(16bytes) +L(176bytesin256): + add $176, %rdi + add $176, %rsi + jmp L(16bytes) +L(160bytesin256): + add $160, %rdi + add $160, %rsi + jmp L(16bytes) +L(144bytesin256): + add $144, %rdi + add $144, %rsi + jmp L(16bytes) +L(128bytesin256): + add $128, %rdi + add $128, %rsi + jmp L(16bytes) +L(112bytesin256): + add $112, %rdi + add $112, %rsi + jmp L(16bytes) +L(96bytesin256): + add $96, %rdi + add $96, %rsi + jmp L(16bytes) +L(80bytesin256): + add $80, %rdi + add $80, %rsi + jmp L(16bytes) +L(64bytesin256): + add $64, %rdi + add $64, %rsi + jmp L(16bytes) +L(48bytesin256): + add $16, %rdi + add $16, %rsi +L(32bytesin256): + add $16, %rdi + add $16, %rsi +L(16bytesin256): + add $16, %rdi + add $16, %rsi +L(16bytes): + mov -16(%rdi), %rax + mov -16(%rsi), %rcx + cmp %rax, %rcx + jne L(diffin8bytes) +L(8bytes): + mov -8(%rdi), %rax + mov -8(%rsi), %rcx + cmp %rax, %rcx + jne L(diffin8bytes) + xor %eax, %eax + ret + + ALIGN (4) +L(12bytes): + mov -12(%rdi), %rax + mov -12(%rsi), %rcx + cmp %rax, %rcx + jne L(diffin8bytes) +L(4bytes): + mov -4(%rsi), %ecx + mov -4(%rdi), %eax + cmp %eax, %ecx + jne L(diffin4bytes) +L(0bytes): + xor %eax, %eax + ret + + ALIGN (4) +L(65bytes): + movdqu -65(%rdi), %xmm1 + movdqu -65(%rsi), %xmm2 + mov $-65, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) +L(49bytes): + movdqu -49(%rdi), %xmm1 + movdqu -49(%rsi), %xmm2 + mov $-49, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) +L(33bytes): + movdqu -33(%rdi), %xmm1 + movdqu -33(%rsi), %xmm2 + mov $-33, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) +L(17bytes): + mov -17(%rdi), %rax + mov -17(%rsi), %rcx + cmp %rax, %rcx + jne L(diffin8bytes) +L(9bytes): + mov -9(%rdi), %rax + mov -9(%rsi), %rcx + cmp %rax, %rcx + jne L(diffin8bytes) + movzbl -1(%rdi), %eax + movzbl -1(%rsi), %edx + sub %edx, %eax + ret + + ALIGN (4) +L(13bytes): + mov -13(%rdi), %rax + mov -13(%rsi), %rcx + cmp %rax, %rcx + jne L(diffin8bytes) + mov -8(%rdi), %rax + mov -8(%rsi), %rcx + cmp %rax, %rcx + jne L(diffin8bytes) + xor %eax, %eax + ret + + ALIGN (4) +L(5bytes): + mov -5(%rdi), %eax + mov -5(%rsi), %ecx + cmp %eax, %ecx + jne L(diffin4bytes) + movzbl -1(%rdi), %eax + movzbl -1(%rsi), %edx + sub %edx, %eax + ret + + ALIGN (4) +L(66bytes): + movdqu -66(%rdi), %xmm1 + movdqu -66(%rsi), %xmm2 + mov $-66, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) +L(50bytes): + movdqu -50(%rdi), %xmm1 + movdqu -50(%rsi), %xmm2 + mov $-50, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) +L(34bytes): + movdqu -34(%rdi), %xmm1 + movdqu -34(%rsi), %xmm2 + mov $-34, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) +L(18bytes): + mov -18(%rdi), %rax + mov -18(%rsi), %rcx + cmp %rax, %rcx + jne L(diffin8bytes) +L(10bytes): + mov -10(%rdi), %rax + mov -10(%rsi), %rcx + cmp %rax, %rcx + jne L(diffin8bytes) + movzwl -2(%rdi), %eax + movzwl -2(%rsi), %ecx + cmp %cl, %al + jne L(end) + and $0xffff, %eax + and $0xffff, %ecx + sub %ecx, %eax + ret + + ALIGN (4) +L(14bytes): + mov -14(%rdi), %rax + mov -14(%rsi), %rcx + cmp %rax, %rcx + jne L(diffin8bytes) + mov -8(%rdi), %rax + mov -8(%rsi), %rcx + cmp %rax, %rcx + jne L(diffin8bytes) + xor %eax, %eax + ret + + ALIGN (4) +L(6bytes): + mov -6(%rdi), %eax + mov -6(%rsi), %ecx + cmp %eax, %ecx + jne L(diffin4bytes) +L(2bytes): + movzwl -2(%rsi), %ecx + movzwl -2(%rdi), %eax + cmp %cl, %al + jne L(end) + and $0xffff, %eax + and $0xffff, %ecx + sub %ecx, %eax + ret + + ALIGN (4) +L(67bytes): + movdqu -67(%rdi), %xmm2 + movdqu -67(%rsi), %xmm1 + mov $-67, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) +L(51bytes): + movdqu -51(%rdi), %xmm2 + movdqu -51(%rsi), %xmm1 + mov $-51, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) +L(35bytes): + movdqu -35(%rsi), %xmm1 + movdqu -35(%rdi), %xmm2 + mov $-35, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) +L(19bytes): + mov -19(%rdi), %rax + mov -19(%rsi), %rcx + cmp %rax, %rcx + jne L(diffin8bytes) +L(11bytes): + mov -11(%rdi), %rax + mov -11(%rsi), %rcx + cmp %rax, %rcx + jne L(diffin8bytes) + mov -4(%rdi), %eax + mov -4(%rsi), %ecx + cmp %eax, %ecx + jne L(diffin4bytes) + xor %eax, %eax + ret + + ALIGN (4) +L(15bytes): + mov -15(%rdi), %rax + mov -15(%rsi), %rcx + cmp %rax, %rcx + jne L(diffin8bytes) + mov -8(%rdi), %rax + mov -8(%rsi), %rcx + cmp %rax, %rcx + jne L(diffin8bytes) + xor %eax, %eax + ret + + ALIGN (4) +L(7bytes): + mov -7(%rdi), %eax + mov -7(%rsi), %ecx + cmp %eax, %ecx + jne L(diffin4bytes) + mov -4(%rdi), %eax + mov -4(%rsi), %ecx + cmp %eax, %ecx + jne L(diffin4bytes) + xor %eax, %eax + ret + + ALIGN (4) +L(3bytes): + movzwl -3(%rdi), %eax + movzwl -3(%rsi), %ecx + cmp %eax, %ecx + jne L(diffin2bytes) +L(1bytes): + movzbl -1(%rdi), %eax + movzbl -1(%rsi), %ecx + sub %ecx, %eax + ret + + ALIGN (4) +L(68bytes): + movdqu -68(%rdi), %xmm2 + movdqu -68(%rsi), %xmm1 + mov $-68, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) +L(52bytes): + movdqu -52(%rdi), %xmm2 + movdqu -52(%rsi), %xmm1 + mov $-52, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) +L(36bytes): + movdqu -36(%rdi), %xmm2 + movdqu -36(%rsi), %xmm1 + mov $-36, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) +L(20bytes): + movdqu -20(%rdi), %xmm2 + movdqu -20(%rsi), %xmm1 + mov $-20, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) + mov -4(%rdi), %eax + mov -4(%rsi), %ecx + cmp %eax, %ecx + jne L(diffin4bytes) + xor %eax, %eax + ret + + ALIGN (4) +L(69bytes): + movdqu -69(%rsi), %xmm1 + movdqu -69(%rdi), %xmm2 + mov $-69, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) +L(53bytes): + movdqu -53(%rsi), %xmm1 + movdqu -53(%rdi), %xmm2 + mov $-53, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) +L(37bytes): + movdqu -37(%rsi), %xmm1 + movdqu -37(%rdi), %xmm2 + mov $-37, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) +L(21bytes): + movdqu -21(%rsi), %xmm1 + movdqu -21(%rdi), %xmm2 + mov $-21, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) + mov -8(%rdi), %rax + mov -8(%rsi), %rcx + cmp %rax, %rcx + jne L(diffin8bytes) + xor %eax, %eax + ret + + ALIGN (4) +L(70bytes): + movdqu -70(%rsi), %xmm1 + movdqu -70(%rdi), %xmm2 + mov $-70, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) +L(54bytes): + movdqu -54(%rsi), %xmm1 + movdqu -54(%rdi), %xmm2 + mov $-54, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) +L(38bytes): + movdqu -38(%rsi), %xmm1 + movdqu -38(%rdi), %xmm2 + mov $-38, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) +L(22bytes): + movdqu -22(%rsi), %xmm1 + movdqu -22(%rdi), %xmm2 + mov $-22, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) + mov -8(%rdi), %rax + mov -8(%rsi), %rcx + cmp %rax, %rcx + jne L(diffin8bytes) + xor %eax, %eax + ret + + ALIGN (4) +L(71bytes): + movdqu -71(%rsi), %xmm1 + movdqu -71(%rdi), %xmm2 + mov $-71, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) +L(55bytes): + movdqu -55(%rdi), %xmm2 + movdqu -55(%rsi), %xmm1 + mov $-55, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) +L(39bytes): + movdqu -39(%rdi), %xmm2 + movdqu -39(%rsi), %xmm1 + mov $-39, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) +L(23bytes): + movdqu -23(%rdi), %xmm2 + movdqu -23(%rsi), %xmm1 + mov $-23, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) + mov -8(%rdi), %rax + mov -8(%rsi), %rcx + cmp %rax, %rcx + jne L(diffin8bytes) + xor %eax, %eax + ret + + ALIGN (4) +L(72bytes): + movdqu -72(%rsi), %xmm1 + movdqu -72(%rdi), %xmm2 + mov $-72, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) +L(56bytes): + movdqu -56(%rdi), %xmm2 + movdqu -56(%rsi), %xmm1 + mov $-56, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) +L(40bytes): + movdqu -40(%rdi), %xmm2 + movdqu -40(%rsi), %xmm1 + mov $-40, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) +L(24bytes): + movdqu -24(%rdi), %xmm2 + movdqu -24(%rsi), %xmm1 + mov $-24, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) + mov -8(%rdi), %rax + mov -8(%rsi), %rcx + cmp %rax, %rcx + jne L(diffin8bytes) + xor %eax, %eax + ret + + ALIGN (4) +L(73bytes): + movdqu -73(%rsi), %xmm1 + movdqu -73(%rdi), %xmm2 + mov $-73, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) +L(57bytes): + movdqu -57(%rdi), %xmm2 + movdqu -57(%rsi), %xmm1 + mov $-57, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) +L(41bytes): + movdqu -41(%rdi), %xmm2 + movdqu -41(%rsi), %xmm1 + mov $-41, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) +L(25bytes): + movdqu -25(%rdi), %xmm2 + movdqu -25(%rsi), %xmm1 + mov $-25, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) + mov -9(%rdi), %rax + mov -9(%rsi), %rcx + cmp %rax, %rcx + jne L(diffin8bytes) + movzbl -1(%rdi), %eax + movzbl -1(%rsi), %ecx + sub %ecx, %eax + ret + + ALIGN (4) +L(74bytes): + movdqu -74(%rsi), %xmm1 + movdqu -74(%rdi), %xmm2 + mov $-74, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) +L(58bytes): + movdqu -58(%rdi), %xmm2 + movdqu -58(%rsi), %xmm1 + mov $-58, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) +L(42bytes): + movdqu -42(%rdi), %xmm2 + movdqu -42(%rsi), %xmm1 + mov $-42, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) +L(26bytes): + movdqu -26(%rdi), %xmm2 + movdqu -26(%rsi), %xmm1 + mov $-26, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) + mov -10(%rdi), %rax + mov -10(%rsi), %rcx + cmp %rax, %rcx + jne L(diffin8bytes) + movzwl -2(%rdi), %eax + movzwl -2(%rsi), %ecx + jmp L(diffin2bytes) + + ALIGN (4) +L(75bytes): + movdqu -75(%rsi), %xmm1 + movdqu -75(%rdi), %xmm2 + mov $-75, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) +L(59bytes): + movdqu -59(%rdi), %xmm2 + movdqu -59(%rsi), %xmm1 + mov $-59, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) +L(43bytes): + movdqu -43(%rdi), %xmm2 + movdqu -43(%rsi), %xmm1 + mov $-43, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) +L(27bytes): + movdqu -27(%rdi), %xmm2 + movdqu -27(%rsi), %xmm1 + mov $-27, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) + mov -11(%rdi), %rax + mov -11(%rsi), %rcx + cmp %rax, %rcx + jne L(diffin8bytes) + mov -4(%rdi), %eax + mov -4(%rsi), %ecx + cmp %eax, %ecx + jne L(diffin4bytes) + xor %eax, %eax + ret + + ALIGN (4) +L(76bytes): + movdqu -76(%rsi), %xmm1 + movdqu -76(%rdi), %xmm2 + mov $-76, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) +L(60bytes): + movdqu -60(%rdi), %xmm2 + movdqu -60(%rsi), %xmm1 + mov $-60, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) +L(44bytes): + movdqu -44(%rdi), %xmm2 + movdqu -44(%rsi), %xmm1 + mov $-44, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) +L(28bytes): + movdqu -28(%rdi), %xmm2 + movdqu -28(%rsi), %xmm1 + mov $-28, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) + mov -12(%rdi), %rax + mov -12(%rsi), %rcx + cmp %rax, %rcx + jne L(diffin8bytes) + mov -4(%rdi), %eax + mov -4(%rsi), %ecx + cmp %eax, %ecx + jne L(diffin4bytes) + xor %eax, %eax + ret + + ALIGN (4) +L(77bytes): + movdqu -77(%rsi), %xmm1 + movdqu -77(%rdi), %xmm2 + mov $-77, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) +L(61bytes): + movdqu -61(%rdi), %xmm2 + movdqu -61(%rsi), %xmm1 + mov $-61, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) +L(45bytes): + movdqu -45(%rdi), %xmm2 + movdqu -45(%rsi), %xmm1 + mov $-45, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) +L(29bytes): + movdqu -29(%rdi), %xmm2 + movdqu -29(%rsi), %xmm1 + mov $-29, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) + + mov -13(%rdi), %rax + mov -13(%rsi), %rcx + cmp %rax, %rcx + jne L(diffin8bytes) + + mov -8(%rdi), %rax + mov -8(%rsi), %rcx + cmp %rax, %rcx + jne L(diffin8bytes) + xor %eax, %eax + ret + + ALIGN (4) +L(78bytes): + movdqu -78(%rsi), %xmm1 + movdqu -78(%rdi), %xmm2 + mov $-78, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) +L(62bytes): + movdqu -62(%rdi), %xmm2 + movdqu -62(%rsi), %xmm1 + mov $-62, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) +L(46bytes): + movdqu -46(%rdi), %xmm2 + movdqu -46(%rsi), %xmm1 + mov $-46, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) +L(30bytes): + movdqu -30(%rdi), %xmm2 + movdqu -30(%rsi), %xmm1 + mov $-30, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) + mov -14(%rdi), %rax + mov -14(%rsi), %rcx + cmp %rax, %rcx + jne L(diffin8bytes) + mov -8(%rdi), %rax + mov -8(%rsi), %rcx + cmp %rax, %rcx + jne L(diffin8bytes) + xor %eax, %eax + ret + + ALIGN (4) +L(79bytes): + movdqu -79(%rsi), %xmm1 + movdqu -79(%rdi), %xmm2 + mov $-79, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) +L(63bytes): + movdqu -63(%rdi), %xmm2 + movdqu -63(%rsi), %xmm1 + mov $-63, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) +L(47bytes): + movdqu -47(%rdi), %xmm2 + movdqu -47(%rsi), %xmm1 + mov $-47, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) +L(31bytes): + movdqu -31(%rdi), %xmm2 + movdqu -31(%rsi), %xmm1 + mov $-31, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) + mov -15(%rdi), %rax + mov -15(%rsi), %rcx + cmp %rax, %rcx + jne L(diffin8bytes) + mov -8(%rdi), %rax + mov -8(%rsi), %rcx + cmp %rax, %rcx + jne L(diffin8bytes) + xor %eax, %eax + ret + + ALIGN (4) +L(64bytes): + movdqu -64(%rdi), %xmm2 + movdqu -64(%rsi), %xmm1 + mov $-64, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) +L(48bytes): + movdqu -48(%rdi), %xmm2 + movdqu -48(%rsi), %xmm1 + mov $-48, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) +L(32bytes): + movdqu -32(%rdi), %xmm2 + movdqu -32(%rsi), %xmm1 + mov $-32, %dl + pxor %xmm1, %xmm2 + ptest %xmm2, %xmm0 + jnc L(less16bytes) + + mov -16(%rdi), %rax + mov -16(%rsi), %rcx + cmp %rax, %rcx + jne L(diffin8bytes) + + mov -8(%rdi), %rax + mov -8(%rsi), %rcx + cmp %rax, %rcx + jne L(diffin8bytes) + xor %eax, %eax + ret + + ALIGN (4) +L(less16bytes): + movsbq %dl, %rdx + mov (%rsi, %rdx), %rcx + mov (%rdi, %rdx), %rax + cmp %rax, %rcx + jne L(diffin8bytes) + mov 8(%rsi, %rdx), %rcx + mov 8(%rdi, %rdx), %rax +L(diffin8bytes): + cmp %eax, %ecx + jne L(diffin4bytes) + shr $32, %rcx + shr $32, %rax +L(diffin4bytes): + cmp %cx, %ax + jne L(diffin2bytes) + shr $16, %ecx + shr $16, %eax + xor %rdx, %rdx +L(diffin2bytes): + cmp %cl, %al + jne L(end) + and $0xffff, %eax + and $0xffff, %ecx + sub %ecx, %eax + ret + + ALIGN (4) +L(end): + and $0xff, %eax + and $0xff, %ecx + sub %ecx, %eax + ret + +END (MEMCMP) + + .section .rodata.sse4.1,"a",@progbits + ALIGN (3) +L(table_64bytes): + .int JMPTBL (L(0bytes), L(table_64bytes)) + .int JMPTBL (L(1bytes), L(table_64bytes)) + .int JMPTBL (L(2bytes), L(table_64bytes)) + .int JMPTBL (L(3bytes), L(table_64bytes)) + .int JMPTBL (L(4bytes), L(table_64bytes)) + .int JMPTBL (L(5bytes), L(table_64bytes)) + .int JMPTBL (L(6bytes), L(table_64bytes)) + .int JMPTBL (L(7bytes), L(table_64bytes)) + .int JMPTBL (L(8bytes), L(table_64bytes)) + .int JMPTBL (L(9bytes), L(table_64bytes)) + .int JMPTBL (L(10bytes), L(table_64bytes)) + .int JMPTBL (L(11bytes), L(table_64bytes)) + .int JMPTBL (L(12bytes), L(table_64bytes)) + .int JMPTBL (L(13bytes), L(table_64bytes)) + .int JMPTBL (L(14bytes), L(table_64bytes)) + .int JMPTBL (L(15bytes), L(table_64bytes)) + .int JMPTBL (L(16bytes), L(table_64bytes)) + .int JMPTBL (L(17bytes), L(table_64bytes)) + .int JMPTBL (L(18bytes), L(table_64bytes)) + .int JMPTBL (L(19bytes), L(table_64bytes)) + .int JMPTBL (L(20bytes), L(table_64bytes)) + .int JMPTBL (L(21bytes), L(table_64bytes)) + .int JMPTBL (L(22bytes), L(table_64bytes)) + .int JMPTBL (L(23bytes), L(table_64bytes)) + .int JMPTBL (L(24bytes), L(table_64bytes)) + .int JMPTBL (L(25bytes), L(table_64bytes)) + .int JMPTBL (L(26bytes), L(table_64bytes)) + .int JMPTBL (L(27bytes), L(table_64bytes)) + .int JMPTBL (L(28bytes), L(table_64bytes)) + .int JMPTBL (L(29bytes), L(table_64bytes)) + .int JMPTBL (L(30bytes), L(table_64bytes)) + .int JMPTBL (L(31bytes), L(table_64bytes)) + .int JMPTBL (L(32bytes), L(table_64bytes)) + .int JMPTBL (L(33bytes), L(table_64bytes)) + .int JMPTBL (L(34bytes), L(table_64bytes)) + .int JMPTBL (L(35bytes), L(table_64bytes)) + .int JMPTBL (L(36bytes), L(table_64bytes)) + .int JMPTBL (L(37bytes), L(table_64bytes)) + .int JMPTBL (L(38bytes), L(table_64bytes)) + .int JMPTBL (L(39bytes), L(table_64bytes)) + .int JMPTBL (L(40bytes), L(table_64bytes)) + .int JMPTBL (L(41bytes), L(table_64bytes)) + .int JMPTBL (L(42bytes), L(table_64bytes)) + .int JMPTBL (L(43bytes), L(table_64bytes)) + .int JMPTBL (L(44bytes), L(table_64bytes)) + .int JMPTBL (L(45bytes), L(table_64bytes)) + .int JMPTBL (L(46bytes), L(table_64bytes)) + .int JMPTBL (L(47bytes), L(table_64bytes)) + .int JMPTBL (L(48bytes), L(table_64bytes)) + .int JMPTBL (L(49bytes), L(table_64bytes)) + .int JMPTBL (L(50bytes), L(table_64bytes)) + .int JMPTBL (L(51bytes), L(table_64bytes)) + .int JMPTBL (L(52bytes), L(table_64bytes)) + .int JMPTBL (L(53bytes), L(table_64bytes)) + .int JMPTBL (L(54bytes), L(table_64bytes)) + .int JMPTBL (L(55bytes), L(table_64bytes)) + .int JMPTBL (L(56bytes), L(table_64bytes)) + .int JMPTBL (L(57bytes), L(table_64bytes)) + .int JMPTBL (L(58bytes), L(table_64bytes)) + .int JMPTBL (L(59bytes), L(table_64bytes)) + .int JMPTBL (L(60bytes), L(table_64bytes)) + .int JMPTBL (L(61bytes), L(table_64bytes)) + .int JMPTBL (L(62bytes), L(table_64bytes)) + .int JMPTBL (L(63bytes), L(table_64bytes)) + .int JMPTBL (L(64bytes), L(table_64bytes)) + .int JMPTBL (L(65bytes), L(table_64bytes)) + .int JMPTBL (L(66bytes), L(table_64bytes)) + .int JMPTBL (L(67bytes), L(table_64bytes)) + .int JMPTBL (L(68bytes), L(table_64bytes)) + .int JMPTBL (L(69bytes), L(table_64bytes)) + .int JMPTBL (L(70bytes), L(table_64bytes)) + .int JMPTBL (L(71bytes), L(table_64bytes)) + .int JMPTBL (L(72bytes), L(table_64bytes)) + .int JMPTBL (L(73bytes), L(table_64bytes)) + .int JMPTBL (L(74bytes), L(table_64bytes)) + .int JMPTBL (L(75bytes), L(table_64bytes)) + .int JMPTBL (L(76bytes), L(table_64bytes)) + .int JMPTBL (L(77bytes), L(table_64bytes)) + .int JMPTBL (L(78bytes), L(table_64bytes)) + .int JMPTBL (L(79bytes), L(table_64bytes)) +#endif diff --git a/sysdeps/x86_64/multiarch/memcmp.S b/sysdeps/x86_64/multiarch/memcmp.S new file mode 100644 index 0000000..301ab28 --- /dev/null +++ b/sysdeps/x86_64/multiarch/memcmp.S @@ -0,0 +1,59 @@ +/* Multiple versions of memcmp + Copyright (C) 2010 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include +#include + +/* Define multiple versions only for the definition in libc. */ +#ifndef NOT_IN_libc + .text +ENTRY(memcmp) + .type memcmp, @gnu_indirect_function + cmpl $0, KIND_OFFSET+__cpu_features(%rip) + jne 1f + call __init_cpu_features +1: leaq __memcmp_sse2(%rip), %rax + testl $bit_SSE4_1, __cpu_features+CPUID_OFFSET+index_SSE4_1(%rip) + jz 2f + leaq __memcmp_sse4_1(%rip), %rax +2: ret +END(memcmp) + +# undef ENTRY +# define ENTRY(name) \ + .type __memcmp_sse2, @function; \ + .p2align 4; \ + __memcmp_sse2: cfi_startproc; \ + CALL_MCOUNT +# undef END +# define END(name) \ + cfi_endproc; .size __memcmp_sse2, .-__memcmp_sse2 + +# ifdef SHARED +# undef libc_hidden_builtin_def +/* IFUNC doesn't work with the hidden functions in shared library since + they will be called without setting up EBX needed for PLT which is + used by IFUNC. */ +# define libc_hidden_builtin_def(name) \ + .globl __GI_memcmp; __GI_memcmp = __memcmp_sse2 +# endif +#endif + +#include "../memcmp.S" diff --git a/sysdeps/x86_64/multiarch/rtld-memcmp.c b/sysdeps/x86_64/multiarch/rtld-memcmp.c new file mode 100644 index 0000000..0f27135 --- /dev/null +++ b/sysdeps/x86_64/multiarch/rtld-memcmp.c @@ -0,0 +1 @@ +#include "../rtld-memcmp.c" -- 1.7.0.5