diff options
| -rw-r--r-- | ChangeLog | 8 | ||||
| -rw-r--r-- | NEWS | 8 | ||||
| -rw-r--r-- | sysdeps/x86_64/multiarch/init-arch.h | 4 | ||||
| -rw-r--r-- | sysdeps/x86_64/multiarch/strcmp-sse42.S | 1836 | ||||
| -rw-r--r-- | sysdeps/x86_64/multiarch/strcmp.S | 1828 |
5 files changed, 1885 insertions, 1799 deletions
diff --git a/ChangeLog b/ChangeLog index 707c285eed..bc8d4cae13 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,11 @@ +2011-10-19 Ulrich Drepper <drepper@gmail.com> + + * sysdeps/x86_64/multiarch/init-arch.h: Define bit_AVX and index_AVX. + * sysdeps/x86_64/multiarch/strcmp-sse42.S: New file. Split out from... + * sysdeps/x86_64/multiarch/strcmp.S: ...here. Include strcmp-sse42.S + when compiling str{,n}casecmp and when AVX is available. Hook up + new optimized code in initializers. + 2011-10-19 Andreas Schwab <schwab@redhat.com> * sysdeps/x86_64/fpu/math_private.h (libc_feupdateenv): Use diff --git a/NEWS b/NEWS index cdb2973028..a4b59f1ee1 100644 --- a/NEWS +++ b/NEWS @@ -1,4 +1,4 @@ -GNU C Library NEWS -- history of user-visible changes. 2011-10-15 +GNU C Library NEWS -- history of user-visible changes. 2011-10-19 Copyright (C) 1992-2009, 2010, 2011 Free Software Foundation, Inc. See the end for copying conditions. @@ -47,6 +47,12 @@ Version 2.15 * Integrate libm with gcc's -ffinite-math-only option. Implemented by Ulrich Drepper. + +* Lots of generic, 64-bit, and x86-64-specific performance optimizations + to math functions. Implemented by Ulrich Drepper. + +* Optimized strcasecmp and strncasecmp for AVX on x86-64. + Implemented by Ulrich Drepper. Version 2.14 diff --git a/sysdeps/x86_64/multiarch/init-arch.h b/sysdeps/x86_64/multiarch/init-arch.h index 6cfdbddc4e..e8d48c2456 100644 --- a/sysdeps/x86_64/multiarch/init-arch.h +++ b/sysdeps/x86_64/multiarch/init-arch.h @@ -1,5 +1,5 @@ /* This file is part of the GNU C Library. - Copyright (C) 2008, 2009, 2010 Free Software Foundation, Inc. + Copyright (C) 2008, 2009, 2010, 2011 Free Software Foundation, Inc. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public @@ -31,11 +31,13 @@ # define bit_SSSE3 (1 << 9) # define bit_SSE4_1 (1 << 19) # define bit_SSE4_2 (1 << 20) +# define bit_AVX (1 << 28) # define index_SSE2 COMMON_CPUID_INDEX_1*CPUID_SIZE+CPUID_EDX_OFFSET # define index_SSSE3 COMMON_CPUID_INDEX_1*CPUID_SIZE+CPUID_ECX_OFFSET # define index_SSE4_1 COMMON_CPUID_INDEX_1*CPUID_SIZE+CPUID_ECX_OFFSET # define index_SSE4_2 COMMON_CPUID_INDEX_1*CPUID_SIZE+CPUID_ECX_OFFSET +# define index_AVX COMMON_CPUID_INDEX_1*CPUID_SIZE+CPUID_ECX_OFFSET # define index_Fast_Rep_String FEATURE_INDEX_1*FEATURE_SIZE # define index_Fast_Copy_Backward FEATURE_INDEX_1*FEATURE_SIZE diff --git a/sysdeps/x86_64/multiarch/strcmp-sse42.S b/sysdeps/x86_64/multiarch/strcmp-sse42.S new file mode 100644 index 0000000000..c9e03b9ca0 --- /dev/null +++ b/sysdeps/x86_64/multiarch/strcmp-sse42.S @@ -0,0 +1,1836 @@ +/* strcmp with SSE4.2 + Copyright (C) 2009, 2010, 2011 Free Software Foundation, Inc. + Contributed by Intel Corporation. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + + +/* 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 +#ifdef USE_AS_STRCASECMP_L +ENTRY (GLABEL(__strcasecmp)) + movq __libc_tsd_LOCALE@gottpoff(%rip),%rax + movq %fs:(%rax),%rdx + + // XXX 5 byte should be before the function + /* 5-byte NOP. */ + .byte 0x0f,0x1f,0x44,0x00,0x00 +END (GLABEL(__strcasecmp)) + /* FALLTHROUGH to strcasecmp_l. */ +#endif +#ifdef USE_AS_STRNCASECMP_L +ENTRY (GLABEL(__strncasecmp)) + movq __libc_tsd_LOCALE@gottpoff(%rip),%rax + movq %fs:(%rax),%rcx + + // XXX 5 byte should be before the function + /* 5-byte NOP. */ + .byte 0x0f,0x1f,0x44,0x00,0x00 +END (GLABEL(__strncasecmp)) + /* FALLTHROUGH to strncasecmp_l. */ +#endif + +STRCMP_SSE42: + cfi_startproc + 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 + movq LOCALE_T___LOCALES+LC_CTYPE*8(%rdx), %rax +# else + movq (%rdx), %rax +# endif + testl $0, 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 + movq LOCALE_T___LOCALES+LC_CTYPE*8(%rcx), %rax +# else + movq (%rcx), %rax +# endif + testl $0, 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, %rdx + je LABEL(strcmp_exitz) + cmp $1, %rdx + je LABEL(Byte0) + mov %rdx, %r11 +#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(belowupper): + .quad 0x4040404040404040 + .quad 0x4040404040404040 +LABEL(topupper): +# ifdef USE_AVX + .quad 0x5a5a5a5a5a5a5a5a + .quad 0x5a5a5a5a5a5a5a5a +# else + .quad 0x5b5b5b5b5b5b5b5b + .quad 0x5b5b5b5b5b5b5b5b +# endif +LABEL(touppermask): + .quad 0x2020202020202020 + .quad 0x2020202020202020 + .previous + movdqa LABEL(belowupper)(%rip), %xmm4 +# define UCLOW_reg %xmm4 + movdqa LABEL(topupper)(%rip), %xmm5 +# define UCHIGH_reg %xmm5 + movdqa LABEL(touppermask)(%rip), %xmm6 +# define LCQWORD_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 +# ifdef USE_AVX +# define TOLOWER(reg1, reg2) \ + vpcmpgtb UCLOW_reg, reg1, %xmm7; \ + vpcmpgtb UCHIGH_reg, reg1, %xmm8; \ + vpcmpgtb UCLOW_reg, reg2, %xmm9; \ + vpcmpgtb UCHIGH_reg, reg2, %xmm10; \ + vpandn %xmm7, %xmm8, %xmm8; \ + vpandn %xmm9, %xmm10, %xmm10; \ + vpand LCQWORD_reg, %xmm8, %xmm8; \ + vpand LCQWORD_reg, %xmm10, %xmm10; \ + vpor reg1, %xmm8, reg1; \ + vpor reg2, %xmm10, reg2 +# else +# define TOLOWER(reg1, reg2) \ + movdqa reg1, %xmm7; \ + movdqa UCHIGH_reg, %xmm8; \ + movdqa reg2, %xmm9; \ + movdqa UCHIGH_reg, %xmm10; \ + pcmpgtb UCLOW_reg, %xmm7; \ + pcmpgtb reg1, %xmm8; \ + pcmpgtb UCLOW_reg, %xmm9; \ + pcmpgtb reg2, %xmm10; \ + pand %xmm8, %xmm7; \ + pand %xmm10, %xmm9; \ + pand LCQWORD_reg, %xmm7; \ + pand LCQWORD_reg, %xmm9; \ + por %xmm7, reg1; \ + por %xmm9, reg2 +# endif + 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 comparision */ +#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 */ + 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): + lea 15(%rax), %r9 + sub %rcx, %r9 + lea LABEL(unaligned_table)(%rip), %r10 + movslq (%r10, %r9,4), %r9 + lea (%r10, %r9), %r10 + 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 + pxor %xmm0, %xmm0 /* clear %xmm0 for null char check */ + 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 + pxor %xmm0, %xmm0 /* clear xmm0, may have changed above */ + + /* + * 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): + pxor %xmm0, %xmm0 + movdqa (%rdi), %xmm2 + movdqa (%rsi), %xmm1 + pcmpeqb %xmm1, %xmm0 /* Any null chars? */ + 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 + + pxor %xmm0, %xmm0 + 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): + pxor %xmm0, %xmm0 + movdqa (%rdi), %xmm2 + movdqa (%rsi), %xmm1 + pcmpeqb %xmm1, %xmm0 + 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 + + pxor %xmm0, %xmm0 + 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): + pxor %xmm0, %xmm0 + movdqa (%rdi), %xmm2 + movdqa (%rsi), %xmm1 + pcmpeqb %xmm1, %xmm0 + 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 + + pxor %xmm0, %xmm0 + 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): + pxor %xmm0, %xmm0 + movdqa (%rdi), %xmm2 + movdqa (%rsi), %xmm1 + pcmpeqb %xmm1, %xmm0 + 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 + + pxor %xmm0, %xmm0 + 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): + pxor %xmm0, %xmm0 + movdqa (%rdi), %xmm2 + movdqa (%rsi), %xmm1 + pcmpeqb %xmm1, %xmm0 + 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 + + pxor %xmm0, %xmm0 + 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): + pxor %xmm0, %xmm0 + movdqa (%rdi), %xmm2 + movdqa (%rsi), %xmm1 + pcmpeqb %xmm1, %xmm0 + 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 + + pxor %xmm0, %xmm0 + 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): + pxor %xmm0, %xmm0 + movdqa (%rdi), %xmm2 + movdqa (%rsi), %xmm1 + pcmpeqb %xmm1, %xmm0 + 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 + + pxor %xmm0, %xmm0 + 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): + pxor %xmm0, %xmm0 + movdqa (%rdi), %xmm2 + movdqa (%rsi), %xmm1 + pcmpeqb %xmm1, %xmm0 + 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 + + pxor %xmm0, %xmm0 + 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): + pxor %xmm0, %xmm0 + movdqa (%rdi), %xmm2 + movdqa (%rsi), %xmm1 + pcmpeqb %xmm1, %xmm0 + 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 + + pxor %xmm0, %xmm0 + 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): + pxor %xmm0, %xmm0 + movdqa (%rdi), %xmm2 + movdqa (%rsi), %xmm1 + pcmpeqb %xmm1, %xmm0 + 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 + + pxor %xmm0, %xmm0 + 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): + pxor %xmm0, %xmm0 + movdqa (%rdi), %xmm2 + movdqa (%rsi), %xmm1 + pcmpeqb %xmm1, %xmm0 + 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 + + pxor %xmm0, %xmm0 + 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): + pxor %xmm0, %xmm0 + movdqa (%rdi), %xmm2 + movdqa (%rsi), %xmm1 + pcmpeqb %xmm1, %xmm0 + 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 + + pxor %xmm0, %xmm0 + 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): + pxor %xmm0, %xmm0 + movdqa (%rdi), %xmm2 + movdqa (%rsi), %xmm1 + pcmpeqb %xmm1, %xmm0 + 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 + + pxor %xmm0, %xmm0 + 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): + pxor %xmm0, %xmm0 + movdqa (%rdi), %xmm2 + movdqa (%rsi), %xmm1 + pcmpeqb %xmm1, %xmm0 + 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 + + pxor %xmm0, %xmm0 + 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): + pxor %xmm0, %xmm0 + movdqa (%rdi), %xmm2 + movdqa (%rsi), %xmm1 + pcmpeqb %xmm1, %xmm0 + 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 + + pxor %xmm0, %xmm0 + 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): + 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 diff --git a/sysdeps/x86_64/multiarch/strcmp.S b/sysdeps/x86_64/multiarch/strcmp.S index 8879855d92..f93c83d7d4 100644 --- a/sysdeps/x86_64/multiarch/strcmp.S +++ b/sysdeps/x86_64/multiarch/strcmp.S @@ -1,5 +1,5 @@ /* strcmp with SSE4.2 - Copyright (C) 2009, 2010 Free Software Foundation, Inc. + Copyright (C) 2009, 2010, 2011 Free Software Foundation, Inc. Contributed by Intel Corporation. This file is part of the GNU C Library. @@ -28,9 +28,9 @@ /* calculate left number to compare */ \ lea -16(%rcx, %r11), %r9; \ cmp %r9, %r11; \ - jb LABEL(strcmp_exitz_sse4_2); \ + jb LABEL(strcmp_exitz); \ test %r9, %r9; \ - je LABEL(strcmp_exitz_sse4_2); \ + je LABEL(strcmp_exitz); \ mov %r9, %r11 # define STRCMP_SSE42 __strncmp_sse42 @@ -42,6 +42,7 @@ # define UPDATE_STRNCMP_COUNTER +# define STRCMP_AVX __strcasecmp_l_avx # define STRCMP_SSE42 __strcasecmp_l_sse42 # define STRCMP_SSSE3 __strcasecmp_l_ssse3 # define STRCMP_SSE2 __strcasecmp_l_sse2 @@ -55,11 +56,12 @@ /* calculate left number to compare */ \ lea -16(%rcx, %r11), %r9; \ cmp %r9, %r11; \ - jb LABEL(strcmp_exitz_sse4_2); \ + jb LABEL(strcmp_exitz); \ test %r9, %r9; \ - je LABEL(strcmp_exitz_sse4_2); \ + je LABEL(strcmp_exitz); \ mov %r9, %r11 +# define STRCMP_AVX __strncasecmp_l_avx # define STRCMP_SSE42 __strncasecmp_l_sse42 # define STRCMP_SSSE3 __strncasecmp_l_ssse3 # define STRCMP_SSE2 __strncasecmp_l_sse2 @@ -75,10 +77,6 @@ # endif #endif -#ifndef LABEL -# define LABEL(l) L(l) -#endif - /* Define multiple versions only for the definition in libc. Don't define multiple versions for strncmp in static library since we need strncmp before the initialization happened. */ @@ -107,6 +105,11 @@ ENTRY(__strcasecmp) jne 1f call __init_cpu_features 1: +# ifdef HAVE_AVX_SUPPORT + leaq __strcasecmp_avx(%rip), %rax + testl $bit_AVX, __cpu_features+CPUID_OFFSET+index_AVX(%rip) + jnz 2f +# endif leaq __strcasecmp_sse42(%rip), %rax testl $bit_SSE4_2, __cpu_features+CPUID_OFFSET+index_SSE4_2(%rip) jnz 2f @@ -125,6 +128,11 @@ ENTRY(__strncasecmp) jne 1f call __init_cpu_features 1: +# ifdef HAVE_AVX_SUPPORT + leaq __strncasecmp_avx(%rip), %rax + testl $bit_AVX, __cpu_features+CPUID_OFFSET+index_AVX(%rip) + jnz 2f +# endif leaq __strncasecmp_sse42(%rip), %rax testl $bit_SSE4_2, __cpu_features+CPUID_OFFSET+index_SSE4_2(%rip) jnz 2f @@ -137,1798 +145,24 @@ END(__strncasecmp) weak_alias (__strncasecmp, strncasecmp) # endif -/* 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.sse4.2,"ax",@progbits - .align 16 - .type STRCMP_SSE42, @function -# ifdef USE_AS_STRCASECMP_L -ENTRY (__strcasecmp_sse42) - movq __libc_tsd_LOCALE@gottpoff(%rip),%rax - movq %fs:(%rax),%rdx - - // XXX 5 byte should be before the function - /* 5-byte NOP. */ - .byte 0x0f,0x1f,0x44,0x00,0x00 -END (__strcasecmp_sse42) - /* FALLTHROUGH to strcasecmp_l. */ -# endif -# ifdef USE_AS_STRNCASECMP_L -ENTRY (__strncasecmp_sse42) - movq __libc_tsd_LOCALE@gottpoff(%rip),%rax - movq %fs:(%rax),%rcx - - // XXX 5 byte should be before the function - /* 5-byte NOP. */ - .byte 0x0f,0x1f,0x44,0x00,0x00 -END (__strncasecmp_sse42) - /* FALLTHROUGH to strncasecmp_l. */ -# endif +# undef LABEL +# define LABEL(l) .L##l##_sse42 +# define GLABEL(l) l##_sse42 +# define SECTION sse4.2 +# include "strcmp-sse42.S" -STRCMP_SSE42: - cfi_startproc - 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 - movq LOCALE_T___LOCALES+LC_CTYPE*8(%rdx), %rax -# else - movq (%rdx), %rax +# ifdef HAVE_AVX_SUPPORT +# if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L +# define LABEL(l) .L##l##_avx +# define GLABEL(l) l##_avx +# define USE_AVX 1 +# undef STRCMP_SSE42 +# define STRCMP_SSE42 STRCMP_AVX +# define SECTION avx +# include "strcmp-sse42.S" # endif - testl $0, 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 - movq LOCALE_T___LOCALES+LC_CTYPE*8(%rcx), %rax -# else - movq (%rcx), %rax -# endif - testl $0, 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, %rdx - je LABEL(strcmp_exitz_sse4_2) - cmp $1, %rdx - je LABEL(Byte0_sse4_2) - mov %rdx, %r11 -# 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 -.Lbelowupper_sse4: - .quad 0x4040404040404040 - .quad 0x4040404040404040 -.Ltopupper_sse4: - .quad 0x5b5b5b5b5b5b5b5b - .quad 0x5b5b5b5b5b5b5b5b -.Ltouppermask_sse4: - .quad 0x2020202020202020 - .quad 0x2020202020202020 - .previous - movdqa .Lbelowupper_sse4(%rip), %xmm4 -# define UCLOW_reg %xmm4 - movdqa .Ltopupper_sse4(%rip), %xmm5 -# define UCHIGH_reg %xmm5 - movdqa .Ltouppermask_sse4(%rip), %xmm6 -# define LCQWORD_reg %xmm6 -# endif - cmp $0x30, %ecx - ja LABEL(crosscache_sse4_2)/* rsi: 16-byte load will cross cache line */ - cmp $0x30, %eax - ja LABEL(crosscache_sse4_2)/* 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 reg1, %xmm7; \ - movdqa UCHIGH_reg, %xmm8; \ - movdqa reg2, %xmm9; \ - movdqa UCHIGH_reg, %xmm10; \ - pcmpgtb UCLOW_reg, %xmm7; \ - pcmpgtb reg1, %xmm8; \ - pcmpgtb UCLOW_reg, %xmm9; \ - pcmpgtb reg2, %xmm10; \ - pand %xmm8, %xmm7; \ - pand %xmm10, %xmm9; \ - pand LCQWORD_reg, %xmm7; \ - pand LCQWORD_reg, %xmm9; \ - por %xmm7, reg1; \ - por %xmm9, 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_sse4_2)/* 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_sse4_2)/* finish comparision */ -# 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_sse4_2): - 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 */ - cmp %eax, %ecx - je LABEL(ashr_0_sse4_2) /* rsi and rdi relative offset same */ - ja LABEL(bigger_sse4_2) - mov %edx, %r8d /* r8d is offset flag for exit tail */ - xchg %ecx, %eax - xchg %rsi, %rdi -LABEL(bigger_sse4_2): - lea 15(%rax), %r9 - sub %rcx, %r9 - lea LABEL(unaligned_table_sse4_2)(%rip), %r10 - movslq (%r10, %r9,4), %r9 - lea (%r10, %r9), %r10 - 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_sse4_2): - - movdqa (%rsi), %xmm1 - pxor %xmm0, %xmm0 /* clear %xmm0 for null char check */ - 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_sse4_2) /* mismatch or null char */ - UPDATE_STRNCMP_COUNTER - mov $16, %rcx - mov $16, %r9 - pxor %xmm0, %xmm0 /* clear xmm0, may have changed above */ - - /* - * 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_sse4_2): - 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_use_sse4_2_exit) -# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz_sse4_2) -# 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_use_sse4_2_exit) -# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz_sse4_2) -# endif - jmp LABEL(ashr_0_use_sse4_2) - - - .p2align 4 -LABEL(ashr_0_use_sse4_2_exit): - jnc LABEL(strcmp_exitz_sse4_2) -# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub %rcx, %r11 - jbe LABEL(strcmp_exitz_sse4_2) -# 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_sse4_2): - pxor %xmm0, %xmm0 - movdqa (%rdi), %xmm2 - movdqa (%rsi), %xmm1 - pcmpeqb %xmm1, %xmm0 /* Any null chars? */ - 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_sse4_2)/* mismatch or null char seen */ - movdqa (%rdi), %xmm3 - UPDATE_STRNCMP_COUNTER - - pxor %xmm0, %xmm0 - 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_sse4_2): - add $16, %r10 - jg LABEL(nibble_ashr_1_use_sse4_2) - -LABEL(nibble_ashr_1_use_sse4_2_restart): - 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(use_sse4_2_exit) -# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz_sse4_2) -# endif - - add $16, %rdx - add $16, %r10 - jg LABEL(nibble_ashr_1_use_sse4_2) - - 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(use_sse4_2_exit) -# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz_sse4_2) -# endif - add $16, %rdx - jmp LABEL(loop_ashr_1_use_sse4_2) - - .p2align 4 -LABEL(nibble_ashr_1_use_sse4_2): - 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_use_sse4_2_exit) -# endif - cmp $14, %ecx - ja LABEL(nibble_ashr_1_use_sse4_2_restart) - - jmp LABEL(nibble_ashr_use_sse4_2_exit) - -/* - * 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_sse4_2): - pxor %xmm0, %xmm0 - movdqa (%rdi), %xmm2 - movdqa (%rsi), %xmm1 - pcmpeqb %xmm1, %xmm0 - 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_sse4_2) - movdqa (%rdi), %xmm3 - UPDATE_STRNCMP_COUNTER - - pxor %xmm0, %xmm0 - 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_sse4_2): - add $16, %r10 - jg LABEL(nibble_ashr_2_use_sse4_2) - -LABEL(nibble_ashr_2_use_sse4_2_restart): - 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(use_sse4_2_exit) -# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz_sse4_2) -# endif - - add $16, %rdx - add $16, %r10 - jg LABEL(nibble_ashr_2_use_sse4_2) - - 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(use_sse4_2_exit) -# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz_sse4_2) -# endif - add $16, %rdx - jmp LABEL(loop_ashr_2_use_sse4_2) - - .p2align 4 -LABEL(nibble_ashr_2_use_sse4_2): - 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_use_sse4_2_exit) -# endif - cmp $13, %ecx - ja LABEL(nibble_ashr_2_use_sse4_2_restart) - - jmp LABEL(nibble_ashr_use_sse4_2_exit) - -/* - * 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_sse4_2): - pxor %xmm0, %xmm0 - movdqa (%rdi), %xmm2 - movdqa (%rsi), %xmm1 - pcmpeqb %xmm1, %xmm0 - 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_sse4_2) - movdqa (%rdi), %xmm3 - - UPDATE_STRNCMP_COUNTER - - pxor %xmm0, %xmm0 - 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_sse4_2): - add $16, %r10 - jg LABEL(nibble_ashr_3_use_sse4_2) - -LABEL(nibble_ashr_3_use_sse4_2_restart): - 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(use_sse4_2_exit) -# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz_sse4_2) -# endif - - add $16, %rdx - add $16, %r10 - jg LABEL(nibble_ashr_3_use_sse4_2) - - 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(use_sse4_2_exit) -# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz_sse4_2) -# endif - add $16, %rdx - jmp LABEL(loop_ashr_3_use_sse4_2) - - .p2align 4 -LABEL(nibble_ashr_3_use_sse4_2): - 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_use_sse4_2_exit) -# endif - cmp $12, %ecx - ja LABEL(nibble_ashr_3_use_sse4_2_restart) - - jmp LABEL(nibble_ashr_use_sse4_2_exit) - -/* - * 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_sse4_2): - pxor %xmm0, %xmm0 - movdqa (%rdi), %xmm2 - movdqa (%rsi), %xmm1 - pcmpeqb %xmm1, %xmm0 - 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_sse4_2) - movdqa (%rdi), %xmm3 - - UPDATE_STRNCMP_COUNTER - - pxor %xmm0, %xmm0 - 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_sse4_2): - add $16, %r10 - jg LABEL(nibble_ashr_4_use_sse4_2) - -LABEL(nibble_ashr_4_use_sse4_2_restart): - 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(use_sse4_2_exit) -# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz_sse4_2) -# endif - - add $16, %rdx - add $16, %r10 - jg LABEL(nibble_ashr_4_use_sse4_2) - - 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(use_sse4_2_exit) -# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz_sse4_2) -# endif - add $16, %rdx - jmp LABEL(loop_ashr_4_use_sse4_2) - - .p2align 4 -LABEL(nibble_ashr_4_use_sse4_2): - 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_use_sse4_2_exit) -# endif - cmp $11, %ecx - ja LABEL(nibble_ashr_4_use_sse4_2_restart) - - jmp LABEL(nibble_ashr_use_sse4_2_exit) - -/* - * 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_sse4_2): - pxor %xmm0, %xmm0 - movdqa (%rdi), %xmm2 - movdqa (%rsi), %xmm1 - pcmpeqb %xmm1, %xmm0 - 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_sse4_2) - movdqa (%rdi), %xmm3 - - UPDATE_STRNCMP_COUNTER - - pxor %xmm0, %xmm0 - 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_sse4_2): - add $16, %r10 - jg LABEL(nibble_ashr_5_use_sse4_2) - -LABEL(nibble_ashr_5_use_sse4_2_restart): - 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(use_sse4_2_exit) -# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz_sse4_2) -# endif - - add $16, %rdx - add $16, %r10 - jg LABEL(nibble_ashr_5_use_sse4_2) - - 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(use_sse4_2_exit) -# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz_sse4_2) -# endif - add $16, %rdx - jmp LABEL(loop_ashr_5_use_sse4_2) - - .p2align 4 -LABEL(nibble_ashr_5_use_sse4_2): - 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_use_sse4_2_exit) -# endif - cmp $10, %ecx - ja LABEL(nibble_ashr_5_use_sse4_2_restart) - - jmp LABEL(nibble_ashr_use_sse4_2_exit) - -/* - * 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_sse4_2): - pxor %xmm0, %xmm0 - movdqa (%rdi), %xmm2 - movdqa (%rsi), %xmm1 - pcmpeqb %xmm1, %xmm0 - 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_sse4_2) - movdqa (%rdi), %xmm3 - - UPDATE_STRNCMP_COUNTER - - pxor %xmm0, %xmm0 - 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_sse4_2): - add $16, %r10 - jg LABEL(nibble_ashr_6_use_sse4_2) - -LABEL(nibble_ashr_6_use_sse4_2_restart): - 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(use_sse4_2_exit) -# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz_sse4_2) -# endif - - add $16, %rdx - add $16, %r10 - jg LABEL(nibble_ashr_6_use_sse4_2) - - 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(use_sse4_2_exit) -# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz_sse4_2) -# endif - add $16, %rdx - jmp LABEL(loop_ashr_6_use_sse4_2) - - .p2align 4 -LABEL(nibble_ashr_6_use_sse4_2): - 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_use_sse4_2_exit) -# endif - cmp $9, %ecx - ja LABEL(nibble_ashr_6_use_sse4_2_restart) - - jmp LABEL(nibble_ashr_use_sse4_2_exit) - -/* - * 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_sse4_2): - pxor %xmm0, %xmm0 - movdqa (%rdi), %xmm2 - movdqa (%rsi), %xmm1 - pcmpeqb %xmm1, %xmm0 - 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_sse4_2) - movdqa (%rdi), %xmm3 - - UPDATE_STRNCMP_COUNTER - - pxor %xmm0, %xmm0 - 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_sse4_2): - add $16, %r10 - jg LABEL(nibble_ashr_7_use_sse4_2) - -LABEL(nibble_ashr_7_use_sse4_2_restart): - 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(use_sse4_2_exit) -# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz_sse4_2) -# endif - - add $16, %rdx - add $16, %r10 - jg LABEL(nibble_ashr_7_use_sse4_2) - - 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(use_sse4_2_exit) -# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz_sse4_2) -# endif - add $16, %rdx - jmp LABEL(loop_ashr_7_use_sse4_2) - - .p2align 4 -LABEL(nibble_ashr_7_use_sse4_2): - 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_use_sse4_2_exit) -# endif - cmp $8, %ecx - ja LABEL(nibble_ashr_7_use_sse4_2_restart) - - jmp LABEL(nibble_ashr_use_sse4_2_exit) - -/* - * 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_sse4_2): - pxor %xmm0, %xmm0 - movdqa (%rdi), %xmm2 - movdqa (%rsi), %xmm1 - pcmpeqb %xmm1, %xmm0 - 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_sse4_2) - movdqa (%rdi), %xmm3 - - UPDATE_STRNCMP_COUNTER - - pxor %xmm0, %xmm0 - 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_sse4_2): - add $16, %r10 - jg LABEL(nibble_ashr_8_use_sse4_2) - -LABEL(nibble_ashr_8_use_sse4_2_restart): - 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(use_sse4_2_exit) -# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz_sse4_2) -# endif - - add $16, %rdx - add $16, %r10 - jg LABEL(nibble_ashr_8_use_sse4_2) - - 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(use_sse4_2_exit) -# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz_sse4_2) -# endif - add $16, %rdx - jmp LABEL(loop_ashr_8_use_sse4_2) - - .p2align 4 -LABEL(nibble_ashr_8_use_sse4_2): - 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_use_sse4_2_exit) -# endif - cmp $7, %ecx - ja LABEL(nibble_ashr_8_use_sse4_2_restart) - - jmp LABEL(nibble_ashr_use_sse4_2_exit) - -/* - * 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_sse4_2): - pxor %xmm0, %xmm0 - movdqa (%rdi), %xmm2 - movdqa (%rsi), %xmm1 - pcmpeqb %xmm1, %xmm0 - 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_sse4_2) - movdqa (%rdi), %xmm3 - - UPDATE_STRNCMP_COUNTER - - pxor %xmm0, %xmm0 - 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_sse4_2): - add $16, %r10 - jg LABEL(nibble_ashr_9_use_sse4_2) - -LABEL(nibble_ashr_9_use_sse4_2_restart): - 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(use_sse4_2_exit) -# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz_sse4_2) -# endif - - add $16, %rdx - add $16, %r10 - jg LABEL(nibble_ashr_9_use_sse4_2) - - 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(use_sse4_2_exit) -# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz_sse4_2) -# endif - add $16, %rdx - jmp LABEL(loop_ashr_9_use_sse4_2) - - .p2align 4 -LABEL(nibble_ashr_9_use_sse4_2): - 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_use_sse4_2_exit) -# endif - cmp $6, %ecx - ja LABEL(nibble_ashr_9_use_sse4_2_restart) - - jmp LABEL(nibble_ashr_use_sse4_2_exit) - -/* - * 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_sse4_2): - pxor %xmm0, %xmm0 - movdqa (%rdi), %xmm2 - movdqa (%rsi), %xmm1 - pcmpeqb %xmm1, %xmm0 - 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_sse4_2) - movdqa (%rdi), %xmm3 - - UPDATE_STRNCMP_COUNTER - - pxor %xmm0, %xmm0 - 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_sse4_2): - add $16, %r10 - jg LABEL(nibble_ashr_10_use_sse4_2) - -LABEL(nibble_ashr_10_use_sse4_2_restart): - 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(use_sse4_2_exit) -# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz_sse4_2) -# endif - - add $16, %rdx - add $16, %r10 - jg LABEL(nibble_ashr_10_use_sse4_2) - - 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(use_sse4_2_exit) -# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz_sse4_2) -# endif - add $16, %rdx - jmp LABEL(loop_ashr_10_use_sse4_2) - - .p2align 4 -LABEL(nibble_ashr_10_use_sse4_2): - 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_use_sse4_2_exit) -# endif - cmp $5, %ecx - ja LABEL(nibble_ashr_10_use_sse4_2_restart) - - jmp LABEL(nibble_ashr_use_sse4_2_exit) - -/* - * 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_sse4_2): - pxor %xmm0, %xmm0 - movdqa (%rdi), %xmm2 - movdqa (%rsi), %xmm1 - pcmpeqb %xmm1, %xmm0 - 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_sse4_2) - movdqa (%rdi), %xmm3 - - UPDATE_STRNCMP_COUNTER - - pxor %xmm0, %xmm0 - 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_sse4_2): - add $16, %r10 - jg LABEL(nibble_ashr_11_use_sse4_2) - -LABEL(nibble_ashr_11_use_sse4_2_restart): - 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(use_sse4_2_exit) -# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz_sse4_2) -# endif - - add $16, %rdx - add $16, %r10 - jg LABEL(nibble_ashr_11_use_sse4_2) - - 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(use_sse4_2_exit) -# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz_sse4_2) -# endif - add $16, %rdx - jmp LABEL(loop_ashr_11_use_sse4_2) - - .p2align 4 -LABEL(nibble_ashr_11_use_sse4_2): - 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_use_sse4_2_exit) -# endif - cmp $4, %ecx - ja LABEL(nibble_ashr_11_use_sse4_2_restart) - - jmp LABEL(nibble_ashr_use_sse4_2_exit) - -/* - * 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_sse4_2): - pxor %xmm0, %xmm0 - movdqa (%rdi), %xmm2 - movdqa (%rsi), %xmm1 - pcmpeqb %xmm1, %xmm0 - 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_sse4_2) - movdqa (%rdi), %xmm3 - - UPDATE_STRNCMP_COUNTER - - pxor %xmm0, %xmm0 - 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_sse4_2): - add $16, %r10 - jg LABEL(nibble_ashr_12_use_sse4_2) - -LABEL(nibble_ashr_12_use_sse4_2_restart): - 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(use_sse4_2_exit) -# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz_sse4_2) -# endif - - add $16, %rdx - add $16, %r10 - jg LABEL(nibble_ashr_12_use_sse4_2) - - 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(use_sse4_2_exit) -# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz_sse4_2) -# endif - add $16, %rdx - jmp LABEL(loop_ashr_12_use_sse4_2) - - .p2align 4 -LABEL(nibble_ashr_12_use_sse4_2): - 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_use_sse4_2_exit) -# endif - cmp $3, %ecx - ja LABEL(nibble_ashr_12_use_sse4_2_restart) - - jmp LABEL(nibble_ashr_use_sse4_2_exit) - -/* - * 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_sse4_2): - pxor %xmm0, %xmm0 - movdqa (%rdi), %xmm2 - movdqa (%rsi), %xmm1 - pcmpeqb %xmm1, %xmm0 - 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_sse4_2) - movdqa (%rdi), %xmm3 - - UPDATE_STRNCMP_COUNTER - - pxor %xmm0, %xmm0 - 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_sse4_2): - add $16, %r10 - jg LABEL(nibble_ashr_13_use_sse4_2) - -LABEL(nibble_ashr_13_use_sse4_2_restart): - 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(use_sse4_2_exit) -# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz_sse4_2) -# endif - - add $16, %rdx - add $16, %r10 - jg LABEL(nibble_ashr_13_use_sse4_2) - - 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(use_sse4_2_exit) -# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz_sse4_2) -# endif - add $16, %rdx - jmp LABEL(loop_ashr_13_use_sse4_2) - - .p2align 4 -LABEL(nibble_ashr_13_use_sse4_2): - 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_use_sse4_2_exit) -# endif - cmp $2, %ecx - ja LABEL(nibble_ashr_13_use_sse4_2_restart) - - jmp LABEL(nibble_ashr_use_sse4_2_exit) - -/* - * 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_sse4_2): - pxor %xmm0, %xmm0 - movdqa (%rdi), %xmm2 - movdqa (%rsi), %xmm1 - pcmpeqb %xmm1, %xmm0 - 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_sse4_2) - movdqa (%rdi), %xmm3 - - UPDATE_STRNCMP_COUNTER - - pxor %xmm0, %xmm0 - 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_sse4_2): - add $16, %r10 - jg LABEL(nibble_ashr_14_use_sse4_2) - -LABEL(nibble_ashr_14_use_sse4_2_restart): - 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(use_sse4_2_exit) -# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz_sse4_2) -# endif - - add $16, %rdx - add $16, %r10 - jg LABEL(nibble_ashr_14_use_sse4_2) - - 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(use_sse4_2_exit) -# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz_sse4_2) -# endif - add $16, %rdx - jmp LABEL(loop_ashr_14_use_sse4_2) - - .p2align 4 -LABEL(nibble_ashr_14_use_sse4_2): - 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_use_sse4_2_exit) -# endif - cmp $1, %ecx - ja LABEL(nibble_ashr_14_use_sse4_2_restart) - - jmp LABEL(nibble_ashr_use_sse4_2_exit) - -/* - * 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_sse4_2): - pxor %xmm0, %xmm0 - movdqa (%rdi), %xmm2 - movdqa (%rsi), %xmm1 - pcmpeqb %xmm1, %xmm0 - 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_sse4_2) - - movdqa (%rdi), %xmm3 - - UPDATE_STRNCMP_COUNTER - - pxor %xmm0, %xmm0 - 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_sse4_2): - add $16, %r10 - jg LABEL(nibble_ashr_15_use_sse4_2) - -LABEL(nibble_ashr_15_use_sse4_2_restart): - 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(use_sse4_2_exit) -# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz_sse4_2) -# endif - - add $16, %rdx - add $16, %r10 - jg LABEL(nibble_ashr_15_use_sse4_2) - - 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(use_sse4_2_exit) -# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub $16, %r11 - jbe LABEL(strcmp_exitz_sse4_2) -# endif - add $16, %rdx - jmp LABEL(loop_ashr_15_use_sse4_2) - - .p2align 4 -LABEL(nibble_ashr_15_use_sse4_2): - 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_use_sse4_2_exit) -# endif - cmp $0, %ecx - ja LABEL(nibble_ashr_15_use_sse4_2_restart) - -LABEL(nibble_ashr_use_sse4_2_exit): -# 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(use_sse4_2_exit): - jnc LABEL(strcmp_exitz_sse4_2) -# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L - sub %rcx, %r11 - jbe LABEL(strcmp_exitz_sse4_2) -# endif - add %rcx, %rdx - lea -16(%rdi, %r9), %rdi - movzbl (%rdi, %rdx), %eax - movzbl (%rsi, %rdx), %edx - test %r8d, %r8d - jz LABEL(use_sse4_2_ret_sse4_2) - xchg %eax, %edx -LABEL(use_sse4_2_ret_sse4_2): -# 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_sse4_2): - 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_sse4_2) - xchg %rsi, %rdi /* recover original order according to flag(%r8d) */ - - .p2align 4 -LABEL(ret_sse4_2): -LABEL(less16bytes_sse4_2): - 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_sse4_2) -# 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_sse4_2): - xor %eax, %eax - ret - - .p2align 4 - // XXX Same as code above -LABEL(Byte0_sse4_2): - 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.sse4.2,"a",@progbits - .p2align 3 -LABEL(unaligned_table_sse4_2): - .int LABEL(ashr_1_sse4_2) - LABEL(unaligned_table_sse4_2) - .int LABEL(ashr_2_sse4_2) - LABEL(unaligned_table_sse4_2) - .int LABEL(ashr_3_sse4_2) - LABEL(unaligned_table_sse4_2) - .int LABEL(ashr_4_sse4_2) - LABEL(unaligned_table_sse4_2) - .int LABEL(ashr_5_sse4_2) - LABEL(unaligned_table_sse4_2) - .int LABEL(ashr_6_sse4_2) - LABEL(unaligned_table_sse4_2) - .int LABEL(ashr_7_sse4_2) - LABEL(unaligned_table_sse4_2) - .int LABEL(ashr_8_sse4_2) - LABEL(unaligned_table_sse4_2) - .int LABEL(ashr_9_sse4_2) - LABEL(unaligned_table_sse4_2) - .int LABEL(ashr_10_sse4_2) - LABEL(unaligned_table_sse4_2) - .int LABEL(ashr_11_sse4_2) - LABEL(unaligned_table_sse4_2) - .int LABEL(ashr_12_sse4_2) - LABEL(unaligned_table_sse4_2) - .int LABEL(ashr_13_sse4_2) - LABEL(unaligned_table_sse4_2) - .int LABEL(ashr_14_sse4_2) - LABEL(unaligned_table_sse4_2) - .int LABEL(ashr_15_sse4_2) - LABEL(unaligned_table_sse4_2) - .int LABEL(ashr_0_sse4_2) - LABEL(unaligned_table_sse4_2) # undef ENTRY |