diff options
Diffstat (limited to 'sysdeps/x86_64/multiarch/strcmp-sse42.S')
| -rw-r--r-- | sysdeps/x86_64/multiarch/strcmp-sse42.S | 1782 |
1 files changed, 0 insertions, 1782 deletions
diff --git a/sysdeps/x86_64/multiarch/strcmp-sse42.S b/sysdeps/x86_64/multiarch/strcmp-sse42.S deleted file mode 100644 index 60313c647a..0000000000 --- a/sysdeps/x86_64/multiarch/strcmp-sse42.S +++ /dev/null @@ -1,1782 +0,0 @@ -/* strcmp with SSE4.2 - Copyright (C) 2009-2022 Free Software Foundation, Inc. - 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 - <https://www.gnu.org/licenses/>. */ - -#include <sysdep.h> - -#ifndef STRCMP_SSE42 -# define STRCMP_SSE42 __strcmp_sse42 -#endif - -#if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L -# include "locale-defines.h" -#endif - -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L -/* Since the counter, %r11, is unsigned, we branch to strcmp_exitz - if the new counter > the old one or is 0. */ -# define UPDATE_STRNCMP_COUNTER \ - /* calculate left number to compare */ \ - lea -16(%rcx, %r11), %r9; \ - cmp %r9, %r11; \ - jb LABEL(strcmp_exitz); \ - test %r9, %r9; \ - je LABEL(strcmp_exitz); \ - mov %r9, %r11 -#else -# define UPDATE_STRNCMP_COUNTER -#endif - -#define SECTION sse4.2 -#define GLABEL(l) l##_sse42 - -#define LABEL(l) .L##l - -/* We use 0x1a: - _SIDD_SBYTE_OPS - | _SIDD_CMP_EQUAL_EACH - | _SIDD_NEGATIVE_POLARITY - | _SIDD_LEAST_SIGNIFICANT - on pcmpistri to find out if two 16byte data elements are the same - and the offset of the first different byte. There are 4 cases: - - 1. Both 16byte data elements are valid and identical. - 2. Both 16byte data elements have EOS and identical. - 3. Both 16byte data elements are valid and they differ at offset X. - 4. At least one 16byte data element has EOS at offset X. Two 16byte - data elements must differ at or before offset X. - - Here is the table of ECX, CFlag, ZFlag and SFlag for 4 cases: - - case ECX CFlag ZFlag SFlag - 1 16 0 0 0 - 2 16 0 1 1 - 3 X 1 0 0 - 4 0 <= X 1 0/1 0/1 - - We exit from the loop for cases 2, 3 and 4 with jbe which branches - when either CFlag or ZFlag is 1. If CFlag == 0, we return 0 for - case 2. */ - - /* Put all SSE 4.2 functions together. */ - .section .text.SECTION,"ax",@progbits - .align 16 - .type STRCMP_SSE42, @function - .globl STRCMP_SSE42 -#ifdef USE_AS_STRCASECMP_L -ENTRY (GLABEL(__strcasecmp)) - movq __libc_tsd_LOCALE@gottpoff(%rip),%rax - mov %fs:(%rax),%RDX_LP - - /* Either 1 or 5 bytes (dependeing if CET is enabled). */ - .p2align 4 -END (GLABEL(__strcasecmp)) - /* FALLTHROUGH to strcasecmp_l. */ -#endif -#ifdef USE_AS_STRNCASECMP_L -ENTRY (GLABEL(__strncasecmp)) - movq __libc_tsd_LOCALE@gottpoff(%rip),%rax - mov %fs:(%rax),%RCX_LP - - /* Either 1 or 5 bytes (dependeing if CET is enabled). */ - .p2align 4 -END (GLABEL(__strncasecmp)) - /* FALLTHROUGH to strncasecmp_l. */ -#endif - - -#define arg arg - -STRCMP_SSE42: - cfi_startproc - _CET_ENDBR - CALL_MCOUNT - -/* - * This implementation uses SSE to compare up to 16 bytes at a time. - */ -#ifdef USE_AS_STRCASECMP_L - /* We have to fall back on the C implementation for locales - with encodings not matching ASCII for single bytes. */ -# if LOCALE_T___LOCALES != 0 || LC_CTYPE != 0 - mov LOCALE_T___LOCALES+LC_CTYPE*LP_SIZE(%rdx), %RAX_LP -# else - mov (%rdx), %RAX_LP -# endif - testl $1, LOCALE_DATA_VALUES+_NL_CTYPE_NONASCII_CASE*SIZEOF_VALUES(%rax) - jne __strcasecmp_l_nonascii -#endif -#ifdef USE_AS_STRNCASECMP_L - /* We have to fall back on the C implementation for locales - with encodings not matching ASCII for single bytes. */ -# if LOCALE_T___LOCALES != 0 || LC_CTYPE != 0 - mov LOCALE_T___LOCALES+LC_CTYPE*LP_SIZE(%rcx), %RAX_LP -# else - mov (%rcx), %RAX_LP -# endif - testl $1, LOCALE_DATA_VALUES+_NL_CTYPE_NONASCII_CASE*SIZEOF_VALUES(%rax) - jne __strncasecmp_l_nonascii -#endif - -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - test %RDX_LP, %RDX_LP - je LABEL(strcmp_exitz) - cmp $1, %RDX_LP - je LABEL(Byte0) - mov %RDX_LP, %R11_LP -#endif - mov %esi, %ecx - mov %edi, %eax -/* Use 64bit AND here to avoid long NOP padding. */ - and $0x3f, %rcx /* rsi alignment in cache line */ - and $0x3f, %rax /* rdi alignment in cache line */ -#if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L - .section .rodata.cst16,"aM",@progbits,16 - .align 16 -LABEL(lcase_min): - .quad 0x3f3f3f3f3f3f3f3f - .quad 0x3f3f3f3f3f3f3f3f -LABEL(lcase_max): - .quad 0x9999999999999999 - .quad 0x9999999999999999 -LABEL(case_add): - .quad 0x2020202020202020 - .quad 0x2020202020202020 - .previous - movdqa LABEL(lcase_min)(%rip), %xmm4 -# define LCASE_MIN_reg %xmm4 - movdqa LABEL(lcase_max)(%rip), %xmm5 -# define LCASE_MAX_reg %xmm5 - movdqa LABEL(case_add)(%rip), %xmm6 -# define CASE_ADD_reg %xmm6 -#endif - cmp $0x30, %ecx - ja LABEL(crosscache)/* rsi: 16-byte load will cross cache line */ - cmp $0x30, %eax - ja LABEL(crosscache)/* rdi: 16-byte load will cross cache line */ - movdqu (%rdi), %xmm1 - movdqu (%rsi), %xmm2 -#if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L -# define TOLOWER(reg1, reg2) \ - movdqa LCASE_MIN_reg, %xmm7; \ - movdqa LCASE_MIN_reg, %xmm8; \ - paddb reg1, %xmm7; \ - paddb reg2, %xmm8; \ - pcmpgtb LCASE_MAX_reg, %xmm7; \ - pcmpgtb LCASE_MAX_reg, %xmm8; \ - pandn CASE_ADD_reg, %xmm7; \ - pandn CASE_ADD_reg, %xmm8; \ - paddb %xmm7, reg1; \ - paddb %xmm8, reg2 - - TOLOWER (%xmm1, %xmm2) -#else -# define TOLOWER(reg1, reg2) -#endif - pxor %xmm0, %xmm0 /* clear %xmm0 for null char checks */ - pcmpeqb %xmm1, %xmm0 /* Any null chars? */ - pcmpeqb %xmm2, %xmm1 /* compare first 16 bytes for equality */ - psubb %xmm0, %xmm1 /* packed sub of comparison results*/ - pmovmskb %xmm1, %edx - sub $0xffff, %edx /* if first 16 bytes are same, edx == 0xffff */ - jnz LABEL(less16bytes)/* If not, find different value or null char */ -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz)/* finish comparison */ -#endif - add $16, %rsi /* prepare to search next 16 bytes */ - add $16, %rdi /* prepare to search next 16 bytes */ - - /* - * Determine source and destination string offsets from 16-byte - * alignment. Use relative offset difference between the two to - * determine which case below to use. - */ - .p2align 4 -LABEL(crosscache): - and $0xfffffffffffffff0, %rsi /* force %rsi is 16 byte aligned */ - and $0xfffffffffffffff0, %rdi /* force %rdi is 16 byte aligned */ - mov $0xffff, %edx /* for equivalent offset */ - xor %r8d, %r8d - and $0xf, %ecx /* offset of rsi */ - and $0xf, %eax /* offset of rdi */ - pxor %xmm0, %xmm0 /* clear %xmm0 for null char check */ - cmp %eax, %ecx - je LABEL(ashr_0) /* rsi and rdi relative offset same */ - ja LABEL(bigger) - mov %edx, %r8d /* r8d is offset flag for exit tail */ - xchg %ecx, %eax - xchg %rsi, %rdi -LABEL(bigger): - movdqa (%rdi), %xmm2 - movdqa (%rsi), %xmm1 - lea 15(%rax), %r9 - sub %rcx, %r9 - lea LABEL(unaligned_table)(%rip), %r10 - movslq (%r10, %r9,4), %r9 - pcmpeqb %xmm1, %xmm0 /* Any null chars? */ - lea (%r10, %r9), %r10 - _CET_NOTRACK jmp *%r10 /* jump to corresponding case */ - -/* - * The following cases will be handled by ashr_0 - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case - * n(0~15) n(0~15) 15(15+ n-n) ashr_0 - */ - .p2align 4 -LABEL(ashr_0): - - movdqa (%rsi), %xmm1 - pcmpeqb %xmm1, %xmm0 /* Any null chars? */ -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L - pcmpeqb (%rdi), %xmm1 /* compare 16 bytes for equality */ -#else - movdqa (%rdi), %xmm2 - TOLOWER (%xmm1, %xmm2) - pcmpeqb %xmm2, %xmm1 /* compare 16 bytes for equality */ -#endif - psubb %xmm0, %xmm1 /* packed sub of comparison results*/ - pmovmskb %xmm1, %r9d - shr %cl, %edx /* adjust 0xffff for offset */ - shr %cl, %r9d /* adjust for 16-byte offset */ - sub %r9d, %edx - /* - * edx must be the same with r9d if in left byte (16-rcx) is equal to - * the start from (16-rax) and no null char was seen. - */ - jne LABEL(less32bytes) /* mismatch or null char */ - UPDATE_STRNCMP_COUNTER - mov $16, %rcx - mov $16, %r9 - - /* - * Now both strings are aligned at 16-byte boundary. Loop over strings - * checking 32-bytes per iteration. - */ - mov %rcx, %rdx /* only for offset of sse4 instruction loop*/ - .p2align 4 -LABEL(ashr_0_use): - movdqa (%rdi,%rdx), %xmm0 -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L - pcmpistri $0x1a,(%rsi,%rdx), %xmm0 -#else - movdqa (%rsi,%rdx), %xmm1 - TOLOWER (%xmm0, %xmm1) - pcmpistri $0x1a, %xmm1, %xmm0 -#endif - lea 16(%rdx), %rdx - jbe LABEL(ashr_0_exit_use) -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - - movdqa (%rdi,%rdx), %xmm0 -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L - pcmpistri $0x1a,(%rsi,%rdx), %xmm0 -#else - movdqa (%rsi,%rdx), %xmm1 - TOLOWER (%xmm0, %xmm1) - pcmpistri $0x1a, %xmm1, %xmm0 -#endif - lea 16(%rdx), %rdx - jbe LABEL(ashr_0_exit_use) -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - jmp LABEL(ashr_0_use) - - - .p2align 4 -LABEL(ashr_0_exit_use): - jnc LABEL(strcmp_exitz) -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub %rcx, %r11 - jbe LABEL(strcmp_exitz) -#endif - lea -16(%rdx, %rcx), %rcx - movzbl (%rdi, %rcx), %eax - movzbl (%rsi, %rcx), %edx -#if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L - leaq _nl_C_LC_CTYPE_tolower+128*4(%rip), %rcx - movl (%rcx,%rax,4), %eax - movl (%rcx,%rdx,4), %edx -#endif - sub %edx, %eax - ret - - - -/* - * The following cases will be handled by ashr_1 - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case - * n(15) n -15 0(15 +(n-15) - n) ashr_1 - */ - .p2align 4 -LABEL(ashr_1): - pslldq $15, %xmm2 /* shift first string to align with second */ - TOLOWER (%xmm1, %xmm2) - pcmpeqb %xmm1, %xmm2 /* compare 16 bytes for equality */ - psubb %xmm0, %xmm2 /* packed sub of comparison results*/ - pmovmskb %xmm2, %r9d - shr %cl, %edx /* adjust 0xffff for offset */ - shr %cl, %r9d /* adjust for 16-byte offset */ - sub %r9d, %edx - jnz LABEL(less32bytes) /* mismatch or null char seen */ - movdqa (%rdi), %xmm3 - UPDATE_STRNCMP_COUNTER - - mov $16, %rcx /* index for loads*/ - mov $1, %r9d /* byte position left over from less32bytes case */ - /* - * Setup %r10 value allows us to detect crossing a page boundary. - * When %r10 goes positive we have crossed a page boundary and - * need to do a nibble. - */ - lea 1(%rdi), %r10 - and $0xfff, %r10 /* offset into 4K page */ - sub $0x1000, %r10 /* subtract 4K pagesize */ - mov %rcx, %rdx /* only for offset of sse4 instruction loop*/ - - .p2align 4 -LABEL(loop_ashr_1_use): - add $16, %r10 - jg LABEL(nibble_ashr_1_use) - -LABEL(nibble_ashr_1_restart_use): - movdqa (%rdi, %rdx), %xmm0 - palignr $1, -16(%rdi, %rdx), %xmm0 -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L - pcmpistri $0x1a,(%rsi,%rdx), %xmm0 -#else - movdqa (%rsi,%rdx), %xmm1 - TOLOWER (%xmm0, %xmm1) - pcmpistri $0x1a, %xmm1, %xmm0 -#endif - jbe LABEL(exit_use) -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - - add $16, %rdx - add $16, %r10 - jg LABEL(nibble_ashr_1_use) - - movdqa (%rdi, %rdx), %xmm0 - palignr $1, -16(%rdi, %rdx), %xmm0 -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L - pcmpistri $0x1a,(%rsi,%rdx), %xmm0 -#else - movdqa (%rsi,%rdx), %xmm1 - TOLOWER (%xmm0, %xmm1) - pcmpistri $0x1a, %xmm1, %xmm0 -#endif - jbe LABEL(exit_use) -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - add $16, %rdx - jmp LABEL(loop_ashr_1_use) - - .p2align 4 -LABEL(nibble_ashr_1_use): - sub $0x1000, %r10 - movdqa -16(%rdi, %rdx), %xmm0 - psrldq $1, %xmm0 - pcmpistri $0x3a,%xmm0, %xmm0 -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - cmp %r11, %rcx - jae LABEL(nibble_ashr_exit_use) -#endif - cmp $14, %ecx - ja LABEL(nibble_ashr_1_restart_use) - - jmp LABEL(nibble_ashr_exit_use) - -/* - * The following cases will be handled by ashr_2 - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case - * n(14~15) n -14 1(15 +(n-14) - n) ashr_2 - */ - .p2align 4 -LABEL(ashr_2): - pslldq $14, %xmm2 - TOLOWER (%xmm1, %xmm2) - pcmpeqb %xmm1, %xmm2 - psubb %xmm0, %xmm2 - pmovmskb %xmm2, %r9d - shr %cl, %edx - shr %cl, %r9d - sub %r9d, %edx - jnz LABEL(less32bytes) - movdqa (%rdi), %xmm3 - UPDATE_STRNCMP_COUNTER - - mov $16, %rcx /* index for loads */ - mov $2, %r9d /* byte position left over from less32bytes case */ - /* - * Setup %r10 value allows us to detect crossing a page boundary. - * When %r10 goes positive we have crossed a page boundary and - * need to do a nibble. - */ - lea 2(%rdi), %r10 - and $0xfff, %r10 /* offset into 4K page */ - sub $0x1000, %r10 /* subtract 4K pagesize */ - mov %rcx, %rdx /* only for offset of sse4 instruction loop*/ - - .p2align 4 -LABEL(loop_ashr_2_use): - add $16, %r10 - jg LABEL(nibble_ashr_2_use) - -LABEL(nibble_ashr_2_restart_use): - movdqa (%rdi, %rdx), %xmm0 - palignr $2, -16(%rdi, %rdx), %xmm0 -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L - pcmpistri $0x1a,(%rsi,%rdx), %xmm0 -#else - movdqa (%rsi,%rdx), %xmm1 - TOLOWER (%xmm0, %xmm1) - pcmpistri $0x1a, %xmm1, %xmm0 -#endif - jbe LABEL(exit_use) -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - - add $16, %rdx - add $16, %r10 - jg LABEL(nibble_ashr_2_use) - - movdqa (%rdi, %rdx), %xmm0 - palignr $2, -16(%rdi, %rdx), %xmm0 -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L - pcmpistri $0x1a,(%rsi,%rdx), %xmm0 -#else - movdqa (%rsi,%rdx), %xmm1 - TOLOWER (%xmm0, %xmm1) - pcmpistri $0x1a, %xmm1, %xmm0 -#endif - jbe LABEL(exit_use) -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - add $16, %rdx - jmp LABEL(loop_ashr_2_use) - - .p2align 4 -LABEL(nibble_ashr_2_use): - sub $0x1000, %r10 - movdqa -16(%rdi, %rdx), %xmm0 - psrldq $2, %xmm0 - pcmpistri $0x3a,%xmm0, %xmm0 -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - cmp %r11, %rcx - jae LABEL(nibble_ashr_exit_use) -#endif - cmp $13, %ecx - ja LABEL(nibble_ashr_2_restart_use) - - jmp LABEL(nibble_ashr_exit_use) - -/* - * The following cases will be handled by ashr_3 - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case - * n(13~15) n -13 2(15 +(n-13) - n) ashr_3 - */ - .p2align 4 -LABEL(ashr_3): - pslldq $13, %xmm2 - TOLOWER (%xmm1, %xmm2) - pcmpeqb %xmm1, %xmm2 - psubb %xmm0, %xmm2 - pmovmskb %xmm2, %r9d - shr %cl, %edx - shr %cl, %r9d - sub %r9d, %edx - jnz LABEL(less32bytes) - movdqa (%rdi), %xmm3 - - UPDATE_STRNCMP_COUNTER - - mov $16, %rcx /* index for loads */ - mov $3, %r9d /* byte position left over from less32bytes case */ - /* - * Setup %r10 value allows us to detect crossing a page boundary. - * When %r10 goes positive we have crossed a page boundary and - * need to do a nibble. - */ - lea 3(%rdi), %r10 - and $0xfff, %r10 /* offset into 4K page */ - sub $0x1000, %r10 /* subtract 4K pagesize */ - mov %rcx, %rdx /* only for offset of sse4 instruction loop*/ - -LABEL(loop_ashr_3_use): - add $16, %r10 - jg LABEL(nibble_ashr_3_use) - -LABEL(nibble_ashr_3_restart_use): - movdqa (%rdi, %rdx), %xmm0 - palignr $3, -16(%rdi, %rdx), %xmm0 -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L - pcmpistri $0x1a,(%rsi,%rdx), %xmm0 -#else - movdqa (%rsi,%rdx), %xmm1 - TOLOWER (%xmm0, %xmm1) - pcmpistri $0x1a, %xmm1, %xmm0 -#endif - jbe LABEL(exit_use) -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - - add $16, %rdx - add $16, %r10 - jg LABEL(nibble_ashr_3_use) - - movdqa (%rdi, %rdx), %xmm0 - palignr $3, -16(%rdi, %rdx), %xmm0 -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L - pcmpistri $0x1a,(%rsi,%rdx), %xmm0 -#else - movdqa (%rsi,%rdx), %xmm1 - TOLOWER (%xmm0, %xmm1) - pcmpistri $0x1a, %xmm1, %xmm0 -#endif - jbe LABEL(exit_use) -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - add $16, %rdx - jmp LABEL(loop_ashr_3_use) - - .p2align 4 -LABEL(nibble_ashr_3_use): - sub $0x1000, %r10 - movdqa -16(%rdi, %rdx), %xmm0 - psrldq $3, %xmm0 - pcmpistri $0x3a,%xmm0, %xmm0 -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - cmp %r11, %rcx - jae LABEL(nibble_ashr_exit_use) -#endif - cmp $12, %ecx - ja LABEL(nibble_ashr_3_restart_use) - - jmp LABEL(nibble_ashr_exit_use) - -/* - * The following cases will be handled by ashr_4 - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case - * n(12~15) n -12 3(15 +(n-12) - n) ashr_4 - */ - .p2align 4 -LABEL(ashr_4): - pslldq $12, %xmm2 - TOLOWER (%xmm1, %xmm2) - pcmpeqb %xmm1, %xmm2 - psubb %xmm0, %xmm2 - pmovmskb %xmm2, %r9d - shr %cl, %edx - shr %cl, %r9d - sub %r9d, %edx - jnz LABEL(less32bytes) - movdqa (%rdi), %xmm3 - - UPDATE_STRNCMP_COUNTER - - mov $16, %rcx /* index for loads */ - mov $4, %r9d /* byte position left over from less32bytes case */ - /* - * Setup %r10 value allows us to detect crossing a page boundary. - * When %r10 goes positive we have crossed a page boundary and - * need to do a nibble. - */ - lea 4(%rdi), %r10 - and $0xfff, %r10 /* offset into 4K page */ - sub $0x1000, %r10 /* subtract 4K pagesize */ - mov %rcx, %rdx /* only for offset of sse4 instruction loop*/ - - .p2align 4 -LABEL(loop_ashr_4_use): - add $16, %r10 - jg LABEL(nibble_ashr_4_use) - -LABEL(nibble_ashr_4_restart_use): - movdqa (%rdi, %rdx), %xmm0 - palignr $4, -16(%rdi, %rdx), %xmm0 -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L - pcmpistri $0x1a,(%rsi,%rdx), %xmm0 -#else - movdqa (%rsi,%rdx), %xmm1 - TOLOWER (%xmm0, %xmm1) - pcmpistri $0x1a, %xmm1, %xmm0 -#endif - jbe LABEL(exit_use) -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - - add $16, %rdx - add $16, %r10 - jg LABEL(nibble_ashr_4_use) - - movdqa (%rdi, %rdx), %xmm0 - palignr $4, -16(%rdi, %rdx), %xmm0 -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L - pcmpistri $0x1a,(%rsi,%rdx), %xmm0 -#else - movdqa (%rsi,%rdx), %xmm1 - TOLOWER (%xmm0, %xmm1) - pcmpistri $0x1a, %xmm1, %xmm0 -#endif - jbe LABEL(exit_use) -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - add $16, %rdx - jmp LABEL(loop_ashr_4_use) - - .p2align 4 -LABEL(nibble_ashr_4_use): - sub $0x1000, %r10 - movdqa -16(%rdi, %rdx), %xmm0 - psrldq $4, %xmm0 - pcmpistri $0x3a,%xmm0, %xmm0 -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - cmp %r11, %rcx - jae LABEL(nibble_ashr_exit_use) -#endif - cmp $11, %ecx - ja LABEL(nibble_ashr_4_restart_use) - - jmp LABEL(nibble_ashr_exit_use) - -/* - * The following cases will be handled by ashr_5 - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case - * n(11~15) n - 11 4(15 +(n-11) - n) ashr_5 - */ - .p2align 4 -LABEL(ashr_5): - pslldq $11, %xmm2 - TOLOWER (%xmm1, %xmm2) - pcmpeqb %xmm1, %xmm2 - psubb %xmm0, %xmm2 - pmovmskb %xmm2, %r9d - shr %cl, %edx - shr %cl, %r9d - sub %r9d, %edx - jnz LABEL(less32bytes) - movdqa (%rdi), %xmm3 - - UPDATE_STRNCMP_COUNTER - - mov $16, %rcx /* index for loads */ - mov $5, %r9d /* byte position left over from less32bytes case */ - /* - * Setup %r10 value allows us to detect crossing a page boundary. - * When %r10 goes positive we have crossed a page boundary and - * need to do a nibble. - */ - lea 5(%rdi), %r10 - and $0xfff, %r10 /* offset into 4K page */ - sub $0x1000, %r10 /* subtract 4K pagesize */ - mov %rcx, %rdx /* only for offset of sse4 instruction loop*/ - - .p2align 4 -LABEL(loop_ashr_5_use): - add $16, %r10 - jg LABEL(nibble_ashr_5_use) - -LABEL(nibble_ashr_5_restart_use): - movdqa (%rdi, %rdx), %xmm0 - palignr $5, -16(%rdi, %rdx), %xmm0 -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L - pcmpistri $0x1a,(%rsi,%rdx), %xmm0 -#else - movdqa (%rsi,%rdx), %xmm1 - TOLOWER (%xmm0, %xmm1) - pcmpistri $0x1a, %xmm1, %xmm0 -#endif - jbe LABEL(exit_use) -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - - add $16, %rdx - add $16, %r10 - jg LABEL(nibble_ashr_5_use) - - movdqa (%rdi, %rdx), %xmm0 - - palignr $5, -16(%rdi, %rdx), %xmm0 -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L - pcmpistri $0x1a,(%rsi,%rdx), %xmm0 -#else - movdqa (%rsi,%rdx), %xmm1 - TOLOWER (%xmm0, %xmm1) - pcmpistri $0x1a, %xmm1, %xmm0 -#endif - jbe LABEL(exit_use) -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - add $16, %rdx - jmp LABEL(loop_ashr_5_use) - - .p2align 4 -LABEL(nibble_ashr_5_use): - sub $0x1000, %r10 - movdqa -16(%rdi, %rdx), %xmm0 - psrldq $5, %xmm0 - pcmpistri $0x3a,%xmm0, %xmm0 -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - cmp %r11, %rcx - jae LABEL(nibble_ashr_exit_use) -#endif - cmp $10, %ecx - ja LABEL(nibble_ashr_5_restart_use) - - jmp LABEL(nibble_ashr_exit_use) - -/* - * The following cases will be handled by ashr_6 - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case - * n(10~15) n - 10 5(15 +(n-10) - n) ashr_6 - */ - .p2align 4 -LABEL(ashr_6): - pslldq $10, %xmm2 - TOLOWER (%xmm1, %xmm2) - pcmpeqb %xmm1, %xmm2 - psubb %xmm0, %xmm2 - pmovmskb %xmm2, %r9d - shr %cl, %edx - shr %cl, %r9d - sub %r9d, %edx - jnz LABEL(less32bytes) - movdqa (%rdi), %xmm3 - - UPDATE_STRNCMP_COUNTER - - mov $16, %rcx /* index for loads */ - mov $6, %r9d /* byte position left over from less32bytes case */ - /* - * Setup %r10 value allows us to detect crossing a page boundary. - * When %r10 goes positive we have crossed a page boundary and - * need to do a nibble. - */ - lea 6(%rdi), %r10 - and $0xfff, %r10 /* offset into 4K page */ - sub $0x1000, %r10 /* subtract 4K pagesize */ - mov %rcx, %rdx /* only for offset of sse4 instruction loop*/ - - .p2align 4 -LABEL(loop_ashr_6_use): - add $16, %r10 - jg LABEL(nibble_ashr_6_use) - -LABEL(nibble_ashr_6_restart_use): - movdqa (%rdi, %rdx), %xmm0 - palignr $6, -16(%rdi, %rdx), %xmm0 -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L - pcmpistri $0x1a,(%rsi,%rdx), %xmm0 -#else - movdqa (%rsi,%rdx), %xmm1 - TOLOWER (%xmm0, %xmm1) - pcmpistri $0x1a, %xmm1, %xmm0 -#endif - jbe LABEL(exit_use) -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - - add $16, %rdx - add $16, %r10 - jg LABEL(nibble_ashr_6_use) - - movdqa (%rdi, %rdx), %xmm0 - palignr $6, -16(%rdi, %rdx), %xmm0 -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L - pcmpistri $0x1a,(%rsi,%rdx), %xmm0 -#else - movdqa (%rsi,%rdx), %xmm1 - TOLOWER (%xmm0, %xmm1) - pcmpistri $0x1a, %xmm1, %xmm0 -#endif - jbe LABEL(exit_use) -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - add $16, %rdx - jmp LABEL(loop_ashr_6_use) - - .p2align 4 -LABEL(nibble_ashr_6_use): - sub $0x1000, %r10 - movdqa -16(%rdi, %rdx), %xmm0 - psrldq $6, %xmm0 - pcmpistri $0x3a,%xmm0, %xmm0 -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - cmp %r11, %rcx - jae LABEL(nibble_ashr_exit_use) -#endif - cmp $9, %ecx - ja LABEL(nibble_ashr_6_restart_use) - - jmp LABEL(nibble_ashr_exit_use) - -/* - * The following cases will be handled by ashr_7 - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case - * n(9~15) n - 9 6(15 +(n - 9) - n) ashr_7 - */ - .p2align 4 -LABEL(ashr_7): - pslldq $9, %xmm2 - TOLOWER (%xmm1, %xmm2) - pcmpeqb %xmm1, %xmm2 - psubb %xmm0, %xmm2 - pmovmskb %xmm2, %r9d - shr %cl, %edx - shr %cl, %r9d - sub %r9d, %edx - jnz LABEL(less32bytes) - movdqa (%rdi), %xmm3 - - UPDATE_STRNCMP_COUNTER - - mov $16, %rcx /* index for loads */ - mov $7, %r9d /* byte position left over from less32bytes case */ - /* - * Setup %r10 value allows us to detect crossing a page boundary. - * When %r10 goes positive we have crossed a page boundary and - * need to do a nibble. - */ - lea 7(%rdi), %r10 - and $0xfff, %r10 /* offset into 4K page */ - sub $0x1000, %r10 /* subtract 4K pagesize */ - mov %rcx, %rdx /* only for offset of sse4 instruction loop*/ - - .p2align 4 -LABEL(loop_ashr_7_use): - add $16, %r10 - jg LABEL(nibble_ashr_7_use) - -LABEL(nibble_ashr_7_restart_use): - movdqa (%rdi, %rdx), %xmm0 - palignr $7, -16(%rdi, %rdx), %xmm0 -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L - pcmpistri $0x1a,(%rsi,%rdx), %xmm0 -#else - movdqa (%rsi,%rdx), %xmm1 - TOLOWER (%xmm0, %xmm1) - pcmpistri $0x1a, %xmm1, %xmm0 -#endif - jbe LABEL(exit_use) -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - - add $16, %rdx - add $16, %r10 - jg LABEL(nibble_ashr_7_use) - - movdqa (%rdi, %rdx), %xmm0 - palignr $7, -16(%rdi, %rdx), %xmm0 -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L - pcmpistri $0x1a,(%rsi,%rdx), %xmm0 -#else - movdqa (%rsi,%rdx), %xmm1 - TOLOWER (%xmm0, %xmm1) - pcmpistri $0x1a, %xmm1, %xmm0 -#endif - jbe LABEL(exit_use) -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - add $16, %rdx - jmp LABEL(loop_ashr_7_use) - - .p2align 4 -LABEL(nibble_ashr_7_use): - sub $0x1000, %r10 - movdqa -16(%rdi, %rdx), %xmm0 - psrldq $7, %xmm0 - pcmpistri $0x3a,%xmm0, %xmm0 -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - cmp %r11, %rcx - jae LABEL(nibble_ashr_exit_use) -#endif - cmp $8, %ecx - ja LABEL(nibble_ashr_7_restart_use) - - jmp LABEL(nibble_ashr_exit_use) - -/* - * The following cases will be handled by ashr_8 - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case - * n(8~15) n - 8 7(15 +(n - 8) - n) ashr_8 - */ - .p2align 4 -LABEL(ashr_8): - pslldq $8, %xmm2 - TOLOWER (%xmm1, %xmm2) - pcmpeqb %xmm1, %xmm2 - psubb %xmm0, %xmm2 - pmovmskb %xmm2, %r9d - shr %cl, %edx - shr %cl, %r9d - sub %r9d, %edx - jnz LABEL(less32bytes) - movdqa (%rdi), %xmm3 - - UPDATE_STRNCMP_COUNTER - - mov $16, %rcx /* index for loads */ - mov $8, %r9d /* byte position left over from less32bytes case */ - /* - * Setup %r10 value allows us to detect crossing a page boundary. - * When %r10 goes positive we have crossed a page boundary and - * need to do a nibble. - */ - lea 8(%rdi), %r10 - and $0xfff, %r10 /* offset into 4K page */ - sub $0x1000, %r10 /* subtract 4K pagesize */ - mov %rcx, %rdx /* only for offset of sse4 instruction loop*/ - - .p2align 4 -LABEL(loop_ashr_8_use): - add $16, %r10 - jg LABEL(nibble_ashr_8_use) - -LABEL(nibble_ashr_8_restart_use): - movdqa (%rdi, %rdx), %xmm0 - palignr $8, -16(%rdi, %rdx), %xmm0 -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L - pcmpistri $0x1a, (%rsi,%rdx), %xmm0 -#else - movdqa (%rsi,%rdx), %xmm1 - TOLOWER (%xmm0, %xmm1) - pcmpistri $0x1a, %xmm1, %xmm0 -#endif - jbe LABEL(exit_use) -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - - add $16, %rdx - add $16, %r10 - jg LABEL(nibble_ashr_8_use) - - movdqa (%rdi, %rdx), %xmm0 - palignr $8, -16(%rdi, %rdx), %xmm0 -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L - pcmpistri $0x1a, (%rsi,%rdx), %xmm0 -#else - movdqa (%rsi,%rdx), %xmm1 - TOLOWER (%xmm0, %xmm1) - pcmpistri $0x1a, %xmm1, %xmm0 -#endif - jbe LABEL(exit_use) -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - add $16, %rdx - jmp LABEL(loop_ashr_8_use) - - .p2align 4 -LABEL(nibble_ashr_8_use): - sub $0x1000, %r10 - movdqa -16(%rdi, %rdx), %xmm0 - psrldq $8, %xmm0 - pcmpistri $0x3a,%xmm0, %xmm0 -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - cmp %r11, %rcx - jae LABEL(nibble_ashr_exit_use) -#endif - cmp $7, %ecx - ja LABEL(nibble_ashr_8_restart_use) - - jmp LABEL(nibble_ashr_exit_use) - -/* - * The following cases will be handled by ashr_9 - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case - * n(7~15) n - 7 8(15 +(n - 7) - n) ashr_9 - */ - .p2align 4 -LABEL(ashr_9): - pslldq $7, %xmm2 - TOLOWER (%xmm1, %xmm2) - pcmpeqb %xmm1, %xmm2 - psubb %xmm0, %xmm2 - pmovmskb %xmm2, %r9d - shr %cl, %edx - shr %cl, %r9d - sub %r9d, %edx - jnz LABEL(less32bytes) - movdqa (%rdi), %xmm3 - - UPDATE_STRNCMP_COUNTER - - mov $16, %rcx /* index for loads */ - mov $9, %r9d /* byte position left over from less32bytes case */ - /* - * Setup %r10 value allows us to detect crossing a page boundary. - * When %r10 goes positive we have crossed a page boundary and - * need to do a nibble. - */ - lea 9(%rdi), %r10 - and $0xfff, %r10 /* offset into 4K page */ - sub $0x1000, %r10 /* subtract 4K pagesize */ - mov %rcx, %rdx /* only for offset of sse4 instruction loop*/ - - .p2align 4 -LABEL(loop_ashr_9_use): - add $16, %r10 - jg LABEL(nibble_ashr_9_use) - -LABEL(nibble_ashr_9_restart_use): - movdqa (%rdi, %rdx), %xmm0 - - palignr $9, -16(%rdi, %rdx), %xmm0 -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L - pcmpistri $0x1a, (%rsi,%rdx), %xmm0 -#else - movdqa (%rsi,%rdx), %xmm1 - TOLOWER (%xmm0, %xmm1) - pcmpistri $0x1a, %xmm1, %xmm0 -#endif - jbe LABEL(exit_use) -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - - add $16, %rdx - add $16, %r10 - jg LABEL(nibble_ashr_9_use) - - movdqa (%rdi, %rdx), %xmm0 - palignr $9, -16(%rdi, %rdx), %xmm0 -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L - pcmpistri $0x1a, (%rsi,%rdx), %xmm0 -#else - movdqa (%rsi,%rdx), %xmm1 - TOLOWER (%xmm0, %xmm1) - pcmpistri $0x1a, %xmm1, %xmm0 -#endif - jbe LABEL(exit_use) -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - add $16, %rdx - jmp LABEL(loop_ashr_9_use) - - .p2align 4 -LABEL(nibble_ashr_9_use): - sub $0x1000, %r10 - movdqa -16(%rdi, %rdx), %xmm0 - psrldq $9, %xmm0 - pcmpistri $0x3a,%xmm0, %xmm0 -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - cmp %r11, %rcx - jae LABEL(nibble_ashr_exit_use) -#endif - cmp $6, %ecx - ja LABEL(nibble_ashr_9_restart_use) - - jmp LABEL(nibble_ashr_exit_use) - -/* - * The following cases will be handled by ashr_10 - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case - * n(6~15) n - 6 9(15 +(n - 6) - n) ashr_10 - */ - .p2align 4 -LABEL(ashr_10): - pslldq $6, %xmm2 - TOLOWER (%xmm1, %xmm2) - pcmpeqb %xmm1, %xmm2 - psubb %xmm0, %xmm2 - pmovmskb %xmm2, %r9d - shr %cl, %edx - shr %cl, %r9d - sub %r9d, %edx - jnz LABEL(less32bytes) - movdqa (%rdi), %xmm3 - - UPDATE_STRNCMP_COUNTER - - mov $16, %rcx /* index for loads */ - mov $10, %r9d /* byte position left over from less32bytes case */ - /* - * Setup %r10 value allows us to detect crossing a page boundary. - * When %r10 goes positive we have crossed a page boundary and - * need to do a nibble. - */ - lea 10(%rdi), %r10 - and $0xfff, %r10 /* offset into 4K page */ - sub $0x1000, %r10 /* subtract 4K pagesize */ - mov %rcx, %rdx /* only for offset of sse4 instruction loop*/ - - .p2align 4 -LABEL(loop_ashr_10_use): - add $16, %r10 - jg LABEL(nibble_ashr_10_use) - -LABEL(nibble_ashr_10_restart_use): - movdqa (%rdi, %rdx), %xmm0 - palignr $10, -16(%rdi, %rdx), %xmm0 -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L - pcmpistri $0x1a, (%rsi,%rdx), %xmm0 -#else - movdqa (%rsi,%rdx), %xmm1 - TOLOWER (%xmm0, %xmm1) - pcmpistri $0x1a, %xmm1, %xmm0 -#endif - jbe LABEL(exit_use) -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - - add $16, %rdx - add $16, %r10 - jg LABEL(nibble_ashr_10_use) - - movdqa (%rdi, %rdx), %xmm0 - palignr $10, -16(%rdi, %rdx), %xmm0 -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L - pcmpistri $0x1a, (%rsi,%rdx), %xmm0 -#else - movdqa (%rsi,%rdx), %xmm1 - TOLOWER (%xmm0, %xmm1) - pcmpistri $0x1a, %xmm1, %xmm0 -#endif - jbe LABEL(exit_use) -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - add $16, %rdx - jmp LABEL(loop_ashr_10_use) - - .p2align 4 -LABEL(nibble_ashr_10_use): - sub $0x1000, %r10 - movdqa -16(%rdi, %rdx), %xmm0 - psrldq $10, %xmm0 - pcmpistri $0x3a,%xmm0, %xmm0 -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - cmp %r11, %rcx - jae LABEL(nibble_ashr_exit_use) -#endif - cmp $5, %ecx - ja LABEL(nibble_ashr_10_restart_use) - - jmp LABEL(nibble_ashr_exit_use) - -/* - * The following cases will be handled by ashr_11 - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case - * n(5~15) n - 5 10(15 +(n - 5) - n) ashr_11 - */ - .p2align 4 -LABEL(ashr_11): - pslldq $5, %xmm2 - TOLOWER (%xmm1, %xmm2) - pcmpeqb %xmm1, %xmm2 - psubb %xmm0, %xmm2 - pmovmskb %xmm2, %r9d - shr %cl, %edx - shr %cl, %r9d - sub %r9d, %edx - jnz LABEL(less32bytes) - movdqa (%rdi), %xmm3 - - UPDATE_STRNCMP_COUNTER - - mov $16, %rcx /* index for loads */ - mov $11, %r9d /* byte position left over from less32bytes case */ - /* - * Setup %r10 value allows us to detect crossing a page boundary. - * When %r10 goes positive we have crossed a page boundary and - * need to do a nibble. - */ - lea 11(%rdi), %r10 - and $0xfff, %r10 /* offset into 4K page */ - sub $0x1000, %r10 /* subtract 4K pagesize */ - mov %rcx, %rdx /* only for offset of sse4 instruction loop*/ - - .p2align 4 -LABEL(loop_ashr_11_use): - add $16, %r10 - jg LABEL(nibble_ashr_11_use) - -LABEL(nibble_ashr_11_restart_use): - movdqa (%rdi, %rdx), %xmm0 - palignr $11, -16(%rdi, %rdx), %xmm0 -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L - pcmpistri $0x1a, (%rsi,%rdx), %xmm0 -#else - movdqa (%rsi,%rdx), %xmm1 - TOLOWER (%xmm0, %xmm1) - pcmpistri $0x1a, %xmm1, %xmm0 -#endif - jbe LABEL(exit_use) -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - - add $16, %rdx - add $16, %r10 - jg LABEL(nibble_ashr_11_use) - - movdqa (%rdi, %rdx), %xmm0 - palignr $11, -16(%rdi, %rdx), %xmm0 -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L - pcmpistri $0x1a, (%rsi,%rdx), %xmm0 -#else - movdqa (%rsi,%rdx), %xmm1 - TOLOWER (%xmm0, %xmm1) - pcmpistri $0x1a, %xmm1, %xmm0 -#endif - jbe LABEL(exit_use) -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - add $16, %rdx - jmp LABEL(loop_ashr_11_use) - - .p2align 4 -LABEL(nibble_ashr_11_use): - sub $0x1000, %r10 - movdqa -16(%rdi, %rdx), %xmm0 - psrldq $11, %xmm0 - pcmpistri $0x3a,%xmm0, %xmm0 -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - cmp %r11, %rcx - jae LABEL(nibble_ashr_exit_use) -#endif - cmp $4, %ecx - ja LABEL(nibble_ashr_11_restart_use) - - jmp LABEL(nibble_ashr_exit_use) - -/* - * The following cases will be handled by ashr_12 - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case - * n(4~15) n - 4 11(15 +(n - 4) - n) ashr_12 - */ - .p2align 4 -LABEL(ashr_12): - pslldq $4, %xmm2 - TOLOWER (%xmm1, %xmm2) - pcmpeqb %xmm1, %xmm2 - psubb %xmm0, %xmm2 - pmovmskb %xmm2, %r9d - shr %cl, %edx - shr %cl, %r9d - sub %r9d, %edx - jnz LABEL(less32bytes) - movdqa (%rdi), %xmm3 - - UPDATE_STRNCMP_COUNTER - - mov $16, %rcx /* index for loads */ - mov $12, %r9d /* byte position left over from less32bytes case */ - /* - * Setup %r10 value allows us to detect crossing a page boundary. - * When %r10 goes positive we have crossed a page boundary and - * need to do a nibble. - */ - lea 12(%rdi), %r10 - and $0xfff, %r10 /* offset into 4K page */ - sub $0x1000, %r10 /* subtract 4K pagesize */ - mov %rcx, %rdx /* only for offset of sse4 instruction loop*/ - - .p2align 4 -LABEL(loop_ashr_12_use): - add $16, %r10 - jg LABEL(nibble_ashr_12_use) - -LABEL(nibble_ashr_12_restart_use): - movdqa (%rdi, %rdx), %xmm0 - palignr $12, -16(%rdi, %rdx), %xmm0 -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L - pcmpistri $0x1a, (%rsi,%rdx), %xmm0 -#else - movdqa (%rsi,%rdx), %xmm1 - TOLOWER (%xmm0, %xmm1) - pcmpistri $0x1a, %xmm1, %xmm0 -#endif - jbe LABEL(exit_use) -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - - add $16, %rdx - add $16, %r10 - jg LABEL(nibble_ashr_12_use) - - movdqa (%rdi, %rdx), %xmm0 - palignr $12, -16(%rdi, %rdx), %xmm0 -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L - pcmpistri $0x1a, (%rsi,%rdx), %xmm0 -#else - movdqa (%rsi,%rdx), %xmm1 - TOLOWER (%xmm0, %xmm1) - pcmpistri $0x1a, %xmm1, %xmm0 -#endif - jbe LABEL(exit_use) -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - add $16, %rdx - jmp LABEL(loop_ashr_12_use) - - .p2align 4 -LABEL(nibble_ashr_12_use): - sub $0x1000, %r10 - movdqa -16(%rdi, %rdx), %xmm0 - psrldq $12, %xmm0 - pcmpistri $0x3a,%xmm0, %xmm0 -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - cmp %r11, %rcx - jae LABEL(nibble_ashr_exit_use) -#endif - cmp $3, %ecx - ja LABEL(nibble_ashr_12_restart_use) - - jmp LABEL(nibble_ashr_exit_use) - -/* - * The following cases will be handled by ashr_13 - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case - * n(3~15) n - 3 12(15 +(n - 3) - n) ashr_13 - */ - .p2align 4 -LABEL(ashr_13): - pslldq $3, %xmm2 - TOLOWER (%xmm1, %xmm2) - pcmpeqb %xmm1, %xmm2 - psubb %xmm0, %xmm2 - pmovmskb %xmm2, %r9d - shr %cl, %edx - shr %cl, %r9d - sub %r9d, %edx - jnz LABEL(less32bytes) - movdqa (%rdi), %xmm3 - - UPDATE_STRNCMP_COUNTER - - mov $16, %rcx /* index for loads */ - mov $13, %r9d /* byte position left over from less32bytes case */ - /* - * Setup %r10 value allows us to detect crossing a page boundary. - * When %r10 goes positive we have crossed a page boundary and - * need to do a nibble. - */ - lea 13(%rdi), %r10 - and $0xfff, %r10 /* offset into 4K page */ - sub $0x1000, %r10 /* subtract 4K pagesize */ - - mov %rcx, %rdx /* only for offset of sse4 instruction loop*/ - - .p2align 4 -LABEL(loop_ashr_13_use): - add $16, %r10 - jg LABEL(nibble_ashr_13_use) - -LABEL(nibble_ashr_13_restart_use): - movdqa (%rdi, %rdx), %xmm0 - palignr $13, -16(%rdi, %rdx), %xmm0 -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L - pcmpistri $0x1a, (%rsi,%rdx), %xmm0 -#else - movdqa (%rsi,%rdx), %xmm1 - TOLOWER (%xmm0, %xmm1) - pcmpistri $0x1a, %xmm1, %xmm0 -#endif - jbe LABEL(exit_use) -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - - add $16, %rdx - add $16, %r10 - jg LABEL(nibble_ashr_13_use) - - movdqa (%rdi, %rdx), %xmm0 - palignr $13, -16(%rdi, %rdx), %xmm0 -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L - pcmpistri $0x1a, (%rsi,%rdx), %xmm0 -#else - movdqa (%rsi,%rdx), %xmm1 - TOLOWER (%xmm0, %xmm1) - pcmpistri $0x1a, %xmm1, %xmm0 -#endif - jbe LABEL(exit_use) -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - add $16, %rdx - jmp LABEL(loop_ashr_13_use) - - .p2align 4 -LABEL(nibble_ashr_13_use): - sub $0x1000, %r10 - movdqa -16(%rdi, %rdx), %xmm0 - psrldq $13, %xmm0 - pcmpistri $0x3a,%xmm0, %xmm0 -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - cmp %r11, %rcx - jae LABEL(nibble_ashr_exit_use) -#endif - cmp $2, %ecx - ja LABEL(nibble_ashr_13_restart_use) - - jmp LABEL(nibble_ashr_exit_use) - -/* - * The following cases will be handled by ashr_14 - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case - * n(2~15) n - 2 13(15 +(n - 2) - n) ashr_14 - */ - .p2align 4 -LABEL(ashr_14): - pslldq $2, %xmm2 - TOLOWER (%xmm1, %xmm2) - pcmpeqb %xmm1, %xmm2 - psubb %xmm0, %xmm2 - pmovmskb %xmm2, %r9d - shr %cl, %edx - shr %cl, %r9d - sub %r9d, %edx - jnz LABEL(less32bytes) - movdqa (%rdi), %xmm3 - - UPDATE_STRNCMP_COUNTER - - mov $16, %rcx /* index for loads */ - mov $14, %r9d /* byte position left over from less32bytes case */ - /* - * Setup %r10 value allows us to detect crossing a page boundary. - * When %r10 goes positive we have crossed a page boundary and - * need to do a nibble. - */ - lea 14(%rdi), %r10 - and $0xfff, %r10 /* offset into 4K page */ - sub $0x1000, %r10 /* subtract 4K pagesize */ - - mov %rcx, %rdx /* only for offset of sse4 instruction loop*/ - - .p2align 4 -LABEL(loop_ashr_14_use): - add $16, %r10 - jg LABEL(nibble_ashr_14_use) - -LABEL(nibble_ashr_14_restart_use): - movdqa (%rdi, %rdx), %xmm0 - palignr $14, -16(%rdi, %rdx), %xmm0 -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L - pcmpistri $0x1a, (%rsi,%rdx), %xmm0 -#else - movdqa (%rsi,%rdx), %xmm1 - TOLOWER (%xmm0, %xmm1) - pcmpistri $0x1a, %xmm1, %xmm0 -#endif - jbe LABEL(exit_use) -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - - add $16, %rdx - add $16, %r10 - jg LABEL(nibble_ashr_14_use) - - movdqa (%rdi, %rdx), %xmm0 - palignr $14, -16(%rdi, %rdx), %xmm0 -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L - pcmpistri $0x1a, (%rsi,%rdx), %xmm0 -#else - movdqa (%rsi,%rdx), %xmm1 - TOLOWER (%xmm0, %xmm1) - pcmpistri $0x1a, %xmm1, %xmm0 -#endif - jbe LABEL(exit_use) -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - add $16, %rdx - jmp LABEL(loop_ashr_14_use) - - .p2align 4 -LABEL(nibble_ashr_14_use): - sub $0x1000, %r10 - movdqa -16(%rdi, %rdx), %xmm0 - psrldq $14, %xmm0 - pcmpistri $0x3a,%xmm0, %xmm0 -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - cmp %r11, %rcx - jae LABEL(nibble_ashr_exit_use) -#endif - cmp $1, %ecx - ja LABEL(nibble_ashr_14_restart_use) - - jmp LABEL(nibble_ashr_exit_use) - -/* - * The following cases will be handled by ashr_15 - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case - * n(1~15) n - 1 14(15 +(n - 1) - n) ashr_15 - */ - .p2align 4 -LABEL(ashr_15): - pslldq $1, %xmm2 - TOLOWER (%xmm1, %xmm2) - pcmpeqb %xmm1, %xmm2 - psubb %xmm0, %xmm2 - pmovmskb %xmm2, %r9d - shr %cl, %edx - shr %cl, %r9d - sub %r9d, %edx - jnz LABEL(less32bytes) - - movdqa (%rdi), %xmm3 - - UPDATE_STRNCMP_COUNTER - - mov $16, %rcx /* index for loads */ - mov $15, %r9d /* byte position left over from less32bytes case */ - /* - * Setup %r10 value allows us to detect crossing a page boundary. - * When %r10 goes positive we have crossed a page boundary and - * need to do a nibble. - */ - lea 15(%rdi), %r10 - and $0xfff, %r10 /* offset into 4K page */ - - sub $0x1000, %r10 /* subtract 4K pagesize */ - - mov %rcx, %rdx /* only for offset of sse4 instruction loop*/ - - .p2align 4 -LABEL(loop_ashr_15_use): - add $16, %r10 - jg LABEL(nibble_ashr_15_use) - -LABEL(nibble_ashr_15_restart_use): - movdqa (%rdi, %rdx), %xmm0 - palignr $15, -16(%rdi, %rdx), %xmm0 -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L - pcmpistri $0x1a, (%rsi,%rdx), %xmm0 -#else - movdqa (%rsi,%rdx), %xmm1 - TOLOWER (%xmm0, %xmm1) - pcmpistri $0x1a, %xmm1, %xmm0 -#endif - jbe LABEL(exit_use) -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - - add $16, %rdx - add $16, %r10 - jg LABEL(nibble_ashr_15_use) - - movdqa (%rdi, %rdx), %xmm0 - palignr $15, -16(%rdi, %rdx), %xmm0 -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L - pcmpistri $0x1a, (%rsi,%rdx), %xmm0 -#else - movdqa (%rsi,%rdx), %xmm1 - TOLOWER (%xmm0, %xmm1) - pcmpistri $0x1a, %xmm1, %xmm0 -#endif - jbe LABEL(exit_use) -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz) -#endif - add $16, %rdx - jmp LABEL(loop_ashr_15_use) - - .p2align 4 -LABEL(nibble_ashr_15_use): - sub $0x1000, %r10 - movdqa -16(%rdi, %rdx), %xmm0 - psrldq $15, %xmm0 - pcmpistri $0x3a,%xmm0, %xmm0 -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - cmp %r11, %rcx - jae LABEL(nibble_ashr_exit_use) -#endif - cmp $0, %ecx - ja LABEL(nibble_ashr_15_restart_use) - -LABEL(nibble_ashr_exit_use): -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L - pcmpistri $0x1a,(%rsi,%rdx), %xmm0 -#else - movdqa (%rsi,%rdx), %xmm1 - TOLOWER (%xmm0, %xmm1) - pcmpistri $0x1a, %xmm1, %xmm0 -#endif - .p2align 4 -LABEL(exit_use): - jnc LABEL(strcmp_exitz) -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub %rcx, %r11 - jbe LABEL(strcmp_exitz) -#endif - add %rcx, %rdx - lea -16(%rdi, %r9), %rdi - movzbl (%rdi, %rdx), %eax - movzbl (%rsi, %rdx), %edx - test %r8d, %r8d - jz LABEL(ret_use) - xchg %eax, %edx -LABEL(ret_use): -#if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L - leaq _nl_C_LC_CTYPE_tolower+128*4(%rip), %rcx - movl (%rcx,%rdx,4), %edx - movl (%rcx,%rax,4), %eax -#endif - - sub %edx, %eax - ret - -LABEL(less32bytes): - lea (%rdi, %rax), %rdi /* locate the exact address for first operand(rdi) */ - lea (%rsi, %rcx), %rsi /* locate the exact address for second operand(rsi) */ - test %r8d, %r8d - jz LABEL(ret) - xchg %rsi, %rdi /* recover original order according to flag(%r8d) */ - - .p2align 4 -LABEL(ret): -LABEL(less16bytes): - bsf %rdx, %rdx /* find and store bit index in %rdx */ - -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub %rdx, %r11 - jbe LABEL(strcmp_exitz) -#endif - movzbl (%rsi, %rdx), %ecx - movzbl (%rdi, %rdx), %eax - -#if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L - leaq _nl_C_LC_CTYPE_tolower+128*4(%rip), %rdx - movl (%rdx,%rcx,4), %ecx - movl (%rdx,%rax,4), %eax -#endif - - sub %ecx, %eax - ret - -LABEL(strcmp_exitz): - xor %eax, %eax - ret - - .p2align 4 - // XXX Same as code above -LABEL(Byte0): - movzbl (%rsi), %ecx - movzbl (%rdi), %eax - -#if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L - leaq _nl_C_LC_CTYPE_tolower+128*4(%rip), %rdx - movl (%rdx,%rcx,4), %ecx - movl (%rdx,%rax,4), %eax -#endif - - sub %ecx, %eax - ret - cfi_endproc - .size STRCMP_SSE42, .-STRCMP_SSE42 - -#undef UCLOW_reg -#undef UCHIGH_reg -#undef LCQWORD_reg -#undef TOLOWER - - /* Put all SSE 4.2 functions together. */ - .section .rodata.SECTION,"a",@progbits - .p2align 3 -LABEL(unaligned_table): - .int LABEL(ashr_1) - LABEL(unaligned_table) - .int LABEL(ashr_2) - LABEL(unaligned_table) - .int LABEL(ashr_3) - LABEL(unaligned_table) - .int LABEL(ashr_4) - LABEL(unaligned_table) - .int LABEL(ashr_5) - LABEL(unaligned_table) - .int LABEL(ashr_6) - LABEL(unaligned_table) - .int LABEL(ashr_7) - LABEL(unaligned_table) - .int LABEL(ashr_8) - LABEL(unaligned_table) - .int LABEL(ashr_9) - LABEL(unaligned_table) - .int LABEL(ashr_10) - LABEL(unaligned_table) - .int LABEL(ashr_11) - LABEL(unaligned_table) - .int LABEL(ashr_12) - LABEL(unaligned_table) - .int LABEL(ashr_13) - LABEL(unaligned_table) - .int LABEL(ashr_14) - LABEL(unaligned_table) - .int LABEL(ashr_15) - LABEL(unaligned_table) - .int LABEL(ashr_0) - LABEL(unaligned_table) - -#undef LABEL -#undef GLABEL -#undef SECTION -#undef movdqa -#undef movdqu -#undef pmovmskb -#undef pcmpistri -#undef psubb -#undef pcmpeqb -#undef psrldq -#undef pslldq -#undef palignr -#undef pxor -#undef D |