diff options
Diffstat (limited to 'sysdeps/x86_64/multiarch/strcmp-sse42.S')
| -rw-r--r-- | sysdeps/x86_64/multiarch/strcmp-sse42.S | 39 |
1 files changed, 37 insertions, 2 deletions
diff --git a/sysdeps/x86_64/multiarch/strcmp-sse42.S b/sysdeps/x86_64/multiarch/strcmp-sse42.S index 70df84ae32..d3c07bd292 100644 --- a/sysdeps/x86_64/multiarch/strcmp-sse42.S +++ b/sysdeps/x86_64/multiarch/strcmp-sse42.S @@ -1,5 +1,5 @@ /* strcmp with SSE4.2 - Copyright (C) 2009-2016 Free Software Foundation, Inc. + Copyright (C) 2009-2018 Free Software Foundation, Inc. Contributed by Intel Corporation. This file is part of the GNU C Library. @@ -17,6 +17,40 @@ License along with the GNU C Library; if not, see <http://www.gnu.org/licenses/>. */ +#include <sysdep.h> + +#ifndef STRCMP_SSE42 +# define STRCMP_SSE42 __strcmp_sse42 +#endif + +#if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L +# include "locale-defines.h" +#endif + +#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L +/* Since the counter, %r11, is unsigned, we branch to strcmp_exitz + if the new counter > the old one or is 0. */ +# define UPDATE_STRNCMP_COUNTER \ + /* calculate left number to compare */ \ + lea -16(%rcx, %r11), %r9; \ + cmp %r9, %r11; \ + jb LABEL(strcmp_exitz); \ + test %r9, %r9; \ + je LABEL(strcmp_exitz); \ + mov %r9, %r11 +#else +# define UPDATE_STRNCMP_COUNTER +#endif + +#ifdef USE_AVX +# define SECTION avx +# define GLABEL(l) l##_avx +#else +# define SECTION sse4.2 +# define GLABEL(l) l##_sse42 +#endif + +#define LABEL(l) .L##l /* We use 0x1a: _SIDD_SBYTE_OPS @@ -92,6 +126,7 @@ END (GLABEL(__strncasecmp)) STRCMP_SSE42: cfi_startproc + _CET_ENDBR CALL_MCOUNT /* @@ -240,7 +275,7 @@ LABEL(bigger): movslq (%r10, %r9,4), %r9 pcmpeqb %xmm1, D(%xmm0) /* Any null chars? */ lea (%r10, %r9), %r10 - jmp *%r10 /* jump to corresponding case */ + _CET_NOTRACK jmp *%r10 /* jump to corresponding case */ /* * The following cases will be handled by ashr_0 |