TeamHeptaMirrors/gcc
1
0
Fork 1
mirror of https://github.com/gcc-mirror/gcc.git synced 2026-05-06 14:59:39 +02:00
Code Issues Packages Projects Releases Wiki Activity

libcpp: replace SSE4.2 helper with an SSSE3 one

Browse Source 
Since the characters we are searching for (CR, LF, '\', '?') all have
distinct ASCII codes mod 16, PSHUFB can help match them all at once.

Directly use the new helper if __SSSE3__ is defined. It makes the other
helpers unused, so mark them inline to prevent warnings.

Rewrite and simplify init_vectorized_lexer.

libcpp/ChangeLog:

	* config.in: Regenerate.
	* configure: Regenerate.
	* configure.ac: Check for SSSE3 instead of SSE4.2.
	* files.cc (read_file_guts): Bump padding to 64 if HAVE_SSSE3.
	* lex.cc (search_line_acc_char): Mark inline, not "unused".
	(search_line_sse2): Mark inline.
	(search_line_sse42): Replace with...
	(search_line_ssse3): ... this new function.  Adjust the use...
	(init_vectorized_lexer): ... here.  Simplify.
This commit is contained in:
Alexander Monakov
2024-08-06 09:47:23 +03:00
parent b8ea13ebf1
commit 20a5b48249
5 changed files with 72 additions and 109 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
libcpp/configure vendored
View File

@@ -9140,14 +9140,14 @@ case $target in
int
main ()
{
asm ("pcmpestri %0, %%xmm0, %%xmm1" : : "i"(0))
asm ("pshufb %xmm0, %xmm1")
;
return 0;
}
_ACEOF
if ac_fn_c_try_compile "$LINENO"; then :
$as_echo "#define HAVE_SSE4 1" >>confdefs.h
$as_echo "#define HAVE_SSSE3 1" >>confdefs.h
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext