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* All files with FSF copyright notices: Update copyright dates using scripts/update-copyrights. * locale/programs/charmap-kw.h: Regenerated. * locale/programs/locfile-kw.h: Likewise.
1828 lines
47 KiB
ArmAsm
1828 lines
47 KiB
ArmAsm
/* strcmp with SSE4.2
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Copyright (C) 2009-2019 Free Software Foundation, Inc.
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Contributed by Intel Corporation.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <sysdep.h>
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#ifndef STRCMP_SSE42
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# define STRCMP_SSE42 __strcmp_sse42
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#endif
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#if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L
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# include "locale-defines.h"
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#endif
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#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
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/* Since the counter, %r11, is unsigned, we branch to strcmp_exitz
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if the new counter > the old one or is 0. */
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# define UPDATE_STRNCMP_COUNTER \
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/* calculate left number to compare */ \
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lea -16(%rcx, %r11), %r9; \
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cmp %r9, %r11; \
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jb LABEL(strcmp_exitz); \
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test %r9, %r9; \
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je LABEL(strcmp_exitz); \
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mov %r9, %r11
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#else
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# define UPDATE_STRNCMP_COUNTER
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#endif
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#ifdef USE_AVX
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# define SECTION avx
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# define GLABEL(l) l##_avx
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#else
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# define SECTION sse4.2
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# define GLABEL(l) l##_sse42
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#endif
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#define LABEL(l) .L##l
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/* We use 0x1a:
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_SIDD_SBYTE_OPS
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| _SIDD_CMP_EQUAL_EACH
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| _SIDD_NEGATIVE_POLARITY
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| _SIDD_LEAST_SIGNIFICANT
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on pcmpistri to find out if two 16byte data elements are the same
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and the offset of the first different byte. There are 4 cases:
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1. Both 16byte data elements are valid and identical.
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2. Both 16byte data elements have EOS and identical.
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3. Both 16byte data elements are valid and they differ at offset X.
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4. At least one 16byte data element has EOS at offset X. Two 16byte
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data elements must differ at or before offset X.
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Here is the table of ECX, CFlag, ZFlag and SFlag for 4 cases:
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case ECX CFlag ZFlag SFlag
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1 16 0 0 0
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2 16 0 1 1
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3 X 1 0 0
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4 0 <= X 1 0/1 0/1
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We exit from the loop for cases 2, 3 and 4 with jbe which branches
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when either CFlag or ZFlag is 1. If CFlag == 0, we return 0 for
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case 2. */
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/* Put all SSE 4.2 functions together. */
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.section .text.SECTION,"ax",@progbits
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.align 16
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.type STRCMP_SSE42, @function
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.globl STRCMP_SSE42
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.hidden STRCMP_SSE42
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#ifdef USE_AS_STRCASECMP_L
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ENTRY (GLABEL(__strcasecmp))
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movq __libc_tsd_LOCALE@gottpoff(%rip),%rax
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mov %fs:(%rax),%RDX_LP
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// XXX 5 byte should be before the function
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/* 5-byte NOP. */
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.byte 0x0f,0x1f,0x44,0x00,0x00
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END (GLABEL(__strcasecmp))
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/* FALLTHROUGH to strcasecmp_l. */
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#endif
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#ifdef USE_AS_STRNCASECMP_L
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ENTRY (GLABEL(__strncasecmp))
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movq __libc_tsd_LOCALE@gottpoff(%rip),%rax
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mov %fs:(%rax),%RCX_LP
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// XXX 5 byte should be before the function
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/* 5-byte NOP. */
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.byte 0x0f,0x1f,0x44,0x00,0x00
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END (GLABEL(__strncasecmp))
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/* FALLTHROUGH to strncasecmp_l. */
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#endif
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#ifdef USE_AVX
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# define movdqa vmovdqa
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# define movdqu vmovdqu
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# define pmovmskb vpmovmskb
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# define pcmpistri vpcmpistri
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# define psubb vpsubb
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# define pcmpeqb vpcmpeqb
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# define psrldq vpsrldq
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# define pslldq vpslldq
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# define palignr vpalignr
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# define pxor vpxor
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# define D(arg) arg, arg
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#else
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# define D(arg) arg
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#endif
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STRCMP_SSE42:
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cfi_startproc
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_CET_ENDBR
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CALL_MCOUNT
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/*
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* This implementation uses SSE to compare up to 16 bytes at a time.
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*/
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#ifdef USE_AS_STRCASECMP_L
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/* We have to fall back on the C implementation for locales
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with encodings not matching ASCII for single bytes. */
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# if LOCALE_T___LOCALES != 0 || LC_CTYPE != 0
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mov LOCALE_T___LOCALES+LC_CTYPE*LP_SIZE(%rdx), %RAX_LP
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# else
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mov (%rdx), %RAX_LP
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# endif
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testl $1, LOCALE_DATA_VALUES+_NL_CTYPE_NONASCII_CASE*SIZEOF_VALUES(%rax)
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jne __strcasecmp_l_nonascii
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#endif
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#ifdef USE_AS_STRNCASECMP_L
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/* We have to fall back on the C implementation for locales
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with encodings not matching ASCII for single bytes. */
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# if LOCALE_T___LOCALES != 0 || LC_CTYPE != 0
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mov LOCALE_T___LOCALES+LC_CTYPE*LP_SIZE(%rcx), %RAX_LP
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# else
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mov (%rcx), %RAX_LP
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# endif
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testl $1, LOCALE_DATA_VALUES+_NL_CTYPE_NONASCII_CASE*SIZEOF_VALUES(%rax)
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jne __strncasecmp_l_nonascii
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#endif
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#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
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test %rdx, %rdx
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je LABEL(strcmp_exitz)
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cmp $1, %rdx
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je LABEL(Byte0)
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mov %rdx, %r11
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#endif
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mov %esi, %ecx
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mov %edi, %eax
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/* Use 64bit AND here to avoid long NOP padding. */
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and $0x3f, %rcx /* rsi alignment in cache line */
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and $0x3f, %rax /* rdi alignment in cache line */
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#if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L
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.section .rodata.cst16,"aM",@progbits,16
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.align 16
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LABEL(belowupper):
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.quad 0x4040404040404040
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.quad 0x4040404040404040
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LABEL(topupper):
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# ifdef USE_AVX
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.quad 0x5a5a5a5a5a5a5a5a
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.quad 0x5a5a5a5a5a5a5a5a
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# else
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.quad 0x5b5b5b5b5b5b5b5b
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.quad 0x5b5b5b5b5b5b5b5b
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# endif
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LABEL(touppermask):
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.quad 0x2020202020202020
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.quad 0x2020202020202020
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.previous
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movdqa LABEL(belowupper)(%rip), %xmm4
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# define UCLOW_reg %xmm4
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movdqa LABEL(topupper)(%rip), %xmm5
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# define UCHIGH_reg %xmm5
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movdqa LABEL(touppermask)(%rip), %xmm6
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# define LCQWORD_reg %xmm6
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#endif
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cmp $0x30, %ecx
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ja LABEL(crosscache)/* rsi: 16-byte load will cross cache line */
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cmp $0x30, %eax
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ja LABEL(crosscache)/* rdi: 16-byte load will cross cache line */
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movdqu (%rdi), %xmm1
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movdqu (%rsi), %xmm2
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#if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L
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# ifdef USE_AVX
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# define TOLOWER(reg1, reg2) \
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vpcmpgtb UCLOW_reg, reg1, %xmm7; \
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vpcmpgtb UCHIGH_reg, reg1, %xmm8; \
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vpcmpgtb UCLOW_reg, reg2, %xmm9; \
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vpcmpgtb UCHIGH_reg, reg2, %xmm10; \
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vpandn %xmm7, %xmm8, %xmm8; \
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vpandn %xmm9, %xmm10, %xmm10; \
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vpand LCQWORD_reg, %xmm8, %xmm8; \
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vpand LCQWORD_reg, %xmm10, %xmm10; \
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vpor reg1, %xmm8, reg1; \
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vpor reg2, %xmm10, reg2
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# else
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# define TOLOWER(reg1, reg2) \
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movdqa reg1, %xmm7; \
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movdqa UCHIGH_reg, %xmm8; \
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movdqa reg2, %xmm9; \
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movdqa UCHIGH_reg, %xmm10; \
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pcmpgtb UCLOW_reg, %xmm7; \
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pcmpgtb reg1, %xmm8; \
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pcmpgtb UCLOW_reg, %xmm9; \
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pcmpgtb reg2, %xmm10; \
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pand %xmm8, %xmm7; \
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pand %xmm10, %xmm9; \
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pand LCQWORD_reg, %xmm7; \
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pand LCQWORD_reg, %xmm9; \
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por %xmm7, reg1; \
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por %xmm9, reg2
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# endif
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TOLOWER (%xmm1, %xmm2)
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#else
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# define TOLOWER(reg1, reg2)
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#endif
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pxor %xmm0, D(%xmm0) /* clear %xmm0 for null char checks */
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pcmpeqb %xmm1, D(%xmm0) /* Any null chars? */
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pcmpeqb %xmm2, D(%xmm1) /* compare first 16 bytes for equality */
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psubb %xmm0, D(%xmm1) /* packed sub of comparison results*/
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pmovmskb %xmm1, %edx
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sub $0xffff, %edx /* if first 16 bytes are same, edx == 0xffff */
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jnz LABEL(less16bytes)/* If not, find different value or null char */
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#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
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sub $16, %r11
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jbe LABEL(strcmp_exitz)/* finish comparison */
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#endif
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add $16, %rsi /* prepare to search next 16 bytes */
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add $16, %rdi /* prepare to search next 16 bytes */
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/*
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* Determine source and destination string offsets from 16-byte
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* alignment. Use relative offset difference between the two to
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* determine which case below to use.
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*/
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.p2align 4
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LABEL(crosscache):
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and $0xfffffffffffffff0, %rsi /* force %rsi is 16 byte aligned */
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and $0xfffffffffffffff0, %rdi /* force %rdi is 16 byte aligned */
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mov $0xffff, %edx /* for equivalent offset */
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xor %r8d, %r8d
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and $0xf, %ecx /* offset of rsi */
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and $0xf, %eax /* offset of rdi */
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pxor %xmm0, D(%xmm0) /* clear %xmm0 for null char check */
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cmp %eax, %ecx
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je LABEL(ashr_0) /* rsi and rdi relative offset same */
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ja LABEL(bigger)
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mov %edx, %r8d /* r8d is offset flag for exit tail */
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xchg %ecx, %eax
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xchg %rsi, %rdi
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LABEL(bigger):
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movdqa (%rdi), %xmm2
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movdqa (%rsi), %xmm1
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lea 15(%rax), %r9
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sub %rcx, %r9
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lea LABEL(unaligned_table)(%rip), %r10
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movslq (%r10, %r9,4), %r9
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pcmpeqb %xmm1, D(%xmm0) /* Any null chars? */
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lea (%r10, %r9), %r10
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_CET_NOTRACK jmp *%r10 /* jump to corresponding case */
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/*
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* The following cases will be handled by ashr_0
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* rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case
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* n(0~15) n(0~15) 15(15+ n-n) ashr_0
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*/
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.p2align 4
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LABEL(ashr_0):
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movdqa (%rsi), %xmm1
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pcmpeqb %xmm1, D(%xmm0) /* Any null chars? */
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#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
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pcmpeqb (%rdi), D(%xmm1) /* compare 16 bytes for equality */
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#else
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movdqa (%rdi), %xmm2
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TOLOWER (%xmm1, %xmm2)
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pcmpeqb %xmm2, D(%xmm1) /* compare 16 bytes for equality */
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#endif
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psubb %xmm0, D(%xmm1) /* packed sub of comparison results*/
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pmovmskb %xmm1, %r9d
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shr %cl, %edx /* adjust 0xffff for offset */
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shr %cl, %r9d /* adjust for 16-byte offset */
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sub %r9d, %edx
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/*
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* edx must be the same with r9d if in left byte (16-rcx) is equal to
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* the start from (16-rax) and no null char was seen.
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*/
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jne LABEL(less32bytes) /* mismatch or null char */
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UPDATE_STRNCMP_COUNTER
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mov $16, %rcx
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mov $16, %r9
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/*
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* Now both strings are aligned at 16-byte boundary. Loop over strings
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* checking 32-bytes per iteration.
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*/
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mov %rcx, %rdx /* only for offset of sse4 instruction loop*/
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.p2align 4
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LABEL(ashr_0_use):
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movdqa (%rdi,%rdx), %xmm0
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#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
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pcmpistri $0x1a,(%rsi,%rdx), %xmm0
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#else
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movdqa (%rsi,%rdx), %xmm1
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TOLOWER (%xmm0, %xmm1)
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pcmpistri $0x1a, %xmm1, %xmm0
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#endif
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lea 16(%rdx), %rdx
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jbe LABEL(ashr_0_exit_use)
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#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
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sub $16, %r11
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jbe LABEL(strcmp_exitz)
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#endif
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movdqa (%rdi,%rdx), %xmm0
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#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
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pcmpistri $0x1a,(%rsi,%rdx), %xmm0
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#else
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movdqa (%rsi,%rdx), %xmm1
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TOLOWER (%xmm0, %xmm1)
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pcmpistri $0x1a, %xmm1, %xmm0
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#endif
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lea 16(%rdx), %rdx
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jbe LABEL(ashr_0_exit_use)
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#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
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sub $16, %r11
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jbe LABEL(strcmp_exitz)
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#endif
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jmp LABEL(ashr_0_use)
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.p2align 4
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LABEL(ashr_0_exit_use):
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jnc LABEL(strcmp_exitz)
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#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
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sub %rcx, %r11
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jbe LABEL(strcmp_exitz)
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#endif
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lea -16(%rdx, %rcx), %rcx
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movzbl (%rdi, %rcx), %eax
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movzbl (%rsi, %rcx), %edx
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#if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L
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leaq _nl_C_LC_CTYPE_tolower+128*4(%rip), %rcx
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movl (%rcx,%rax,4), %eax
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movl (%rcx,%rdx,4), %edx
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#endif
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sub %edx, %eax
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ret
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/*
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* The following cases will be handled by ashr_1
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* rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case
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* n(15) n -15 0(15 +(n-15) - n) ashr_1
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*/
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.p2align 4
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LABEL(ashr_1):
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pslldq $15, D(%xmm2) /* shift first string to align with second */
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TOLOWER (%xmm1, %xmm2)
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pcmpeqb %xmm1, D(%xmm2) /* compare 16 bytes for equality */
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psubb %xmm0, D(%xmm2) /* packed sub of comparison results*/
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pmovmskb %xmm2, %r9d
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shr %cl, %edx /* adjust 0xffff for offset */
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shr %cl, %r9d /* adjust for 16-byte offset */
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sub %r9d, %edx
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jnz LABEL(less32bytes) /* mismatch or null char seen */
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movdqa (%rdi), %xmm3
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UPDATE_STRNCMP_COUNTER
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mov $16, %rcx /* index for loads*/
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mov $1, %r9d /* byte position left over from less32bytes case */
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/*
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* Setup %r10 value allows us to detect crossing a page boundary.
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* When %r10 goes positive we have crossed a page boundary and
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* need to do a nibble.
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*/
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lea 1(%rdi), %r10
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and $0xfff, %r10 /* offset into 4K page */
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sub $0x1000, %r10 /* subtract 4K pagesize */
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mov %rcx, %rdx /* only for offset of sse4 instruction loop*/
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.p2align 4
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LABEL(loop_ashr_1_use):
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add $16, %r10
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jg LABEL(nibble_ashr_1_use)
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LABEL(nibble_ashr_1_restart_use):
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movdqa (%rdi, %rdx), %xmm0
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palignr $1, -16(%rdi, %rdx), D(%xmm0)
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#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
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pcmpistri $0x1a,(%rsi,%rdx), %xmm0
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#else
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movdqa (%rsi,%rdx), %xmm1
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TOLOWER (%xmm0, %xmm1)
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pcmpistri $0x1a, %xmm1, %xmm0
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#endif
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jbe LABEL(exit_use)
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#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
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sub $16, %r11
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jbe LABEL(strcmp_exitz)
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#endif
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add $16, %rdx
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add $16, %r10
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jg LABEL(nibble_ashr_1_use)
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movdqa (%rdi, %rdx), %xmm0
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palignr $1, -16(%rdi, %rdx), D(%xmm0)
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#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
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pcmpistri $0x1a,(%rsi,%rdx), %xmm0
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#else
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movdqa (%rsi,%rdx), %xmm1
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TOLOWER (%xmm0, %xmm1)
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pcmpistri $0x1a, %xmm1, %xmm0
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#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, D(%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, D(%xmm2)
|
|
TOLOWER (%xmm1, %xmm2)
|
|
pcmpeqb %xmm1, D(%xmm2)
|
|
psubb %xmm0, D(%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), D(%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), D(%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, D(%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, D(%xmm2)
|
|
TOLOWER (%xmm1, %xmm2)
|
|
pcmpeqb %xmm1, D(%xmm2)
|
|
psubb %xmm0, D(%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), D(%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), D(%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, D(%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, D(%xmm2)
|
|
TOLOWER (%xmm1, %xmm2)
|
|
pcmpeqb %xmm1, D(%xmm2)
|
|
psubb %xmm0, D(%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), D(%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), D(%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, D(%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, D(%xmm2)
|
|
TOLOWER (%xmm1, %xmm2)
|
|
pcmpeqb %xmm1, D(%xmm2)
|
|
psubb %xmm0, D(%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), D(%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), D(%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, D(%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, D(%xmm2)
|
|
TOLOWER (%xmm1, %xmm2)
|
|
pcmpeqb %xmm1, D(%xmm2)
|
|
psubb %xmm0, D(%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), D(%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), D(%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, D(%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, D(%xmm2)
|
|
TOLOWER (%xmm1, %xmm2)
|
|
pcmpeqb %xmm1, D(%xmm2)
|
|
psubb %xmm0, D(%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), D(%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), D(%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, D(%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, D(%xmm2)
|
|
TOLOWER (%xmm1, %xmm2)
|
|
pcmpeqb %xmm1, D(%xmm2)
|
|
psubb %xmm0, D(%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), D(%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), D(%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, D(%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, D(%xmm2)
|
|
TOLOWER (%xmm1, %xmm2)
|
|
pcmpeqb %xmm1, D(%xmm2)
|
|
psubb %xmm0, D(%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), D(%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), D(%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, D(%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, D(%xmm2)
|
|
TOLOWER (%xmm1, %xmm2)
|
|
pcmpeqb %xmm1, D(%xmm2)
|
|
psubb %xmm0, D(%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), D(%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), D(%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, D(%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, D(%xmm2)
|
|
TOLOWER (%xmm1, %xmm2)
|
|
pcmpeqb %xmm1, D(%xmm2)
|
|
psubb %xmm0, D(%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), D(%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), D(%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, D(%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, D(%xmm2)
|
|
TOLOWER (%xmm1, %xmm2)
|
|
pcmpeqb %xmm1, D(%xmm2)
|
|
psubb %xmm0, D(%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), D(%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), D(%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, D(%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, D(%xmm2)
|
|
TOLOWER (%xmm1, %xmm2)
|
|
pcmpeqb %xmm1, D(%xmm2)
|
|
psubb %xmm0, D(%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), D(%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), D(%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, D(%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, D(%xmm2)
|
|
TOLOWER (%xmm1, %xmm2)
|
|
pcmpeqb %xmm1, D(%xmm2)
|
|
psubb %xmm0, D(%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), D(%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), D(%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, D(%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, D(%xmm2)
|
|
TOLOWER (%xmm1, %xmm2)
|
|
pcmpeqb %xmm1, D(%xmm2)
|
|
psubb %xmm0, D(%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), D(%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), D(%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, D(%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):
|
|
movzx (%rsi), %ecx
|
|
movzx (%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
|