mirror of
git://gcc.gnu.org/git/gcc.git
synced 2025-03-04 01:16:06 +08:00
c51040cb43
This patch optimize this following permutation with consecutive patterns index:
typedef char vnx16i __attribute__ ((vector_size (16)));
#define MASK_16 12, 13, 14, 15, 12, 13, 14, 15, 12, 13, 14, 15, 12, 13, 14, 15
vnx16i __attribute__ ((noinline, noclone))
test_1 (vnx16i x, vnx16i y)
{
return __builtin_shufflevector (x, y, MASK_16);
}
Before this patch:
lui a5,%hi(.LC0)
addi a5,a5,%lo(.LC0)
vsetivli zero,16,e8,m1,ta,ma
vle8.v v3,0(a5)
vle8.v v2,0(a1)
vrgather.vv v1,v2,v3
vse8.v v1,0(a0)
ret
After this patch:
vsetivli zero,16,e8,mf8,ta,ma
vle8.v v2,0(a1)
vsetivli zero,4,e32,mf2,ta,ma
vrgather.vi v1,v2,3
vsetivli zero,16,e8,mf8,ta,ma
vse8.v v1,0(a0)
ret
Overal reduce 1 instruction which is vector load instruction which is much more expansive
than VL toggling.
Also, with this patch, we are using vrgather.vi which reduce 1 vector register consumption.
gcc/ChangeLog:
* config/riscv/riscv-v.cc (shuffle_consecutive_patterns): New function.
(expand_vec_perm_const_1): Add consecutive pattern recognition.
gcc/testsuite/ChangeLog:
* gcc.target/riscv/rvv/autovec/vls/def.h: Add new test.
* gcc.target/riscv/rvv/autovec/vls-vlmax/consecutive-1.c: New test.
* gcc.target/riscv/rvv/autovec/vls-vlmax/consecutive-2.c: New test.
* gcc.target/riscv/rvv/autovec/vls-vlmax/consecutive_run-1.c: New test.
* gcc.target/riscv/rvv/autovec/vls-vlmax/consecutive_run-2.c: New test.
* gcc.target/riscv/rvv/autovec/vls/consecutive-1.c: New test.
* gcc.target/riscv/rvv/autovec/vls/consecutive-2.c: New test.
* gcc.target/riscv/rvv/autovec/vls/consecutive-3.c: New test.
|
||
|---|---|---|
| c++tools | ||
| config | ||
| contrib | ||
| fixincludes | ||
| gcc | ||
| gnattools | ||
| gotools | ||
| include | ||
| INSTALL | ||
| intl | ||
| libada | ||
| libatomic | ||
| libbacktrace | ||
| libcc1 | ||
| libcody | ||
| libcpp | ||
| libdecnumber | ||
| libffi | ||
| libgcc | ||
| libgfortran | ||
| libgm2 | ||
| libgo | ||
| libgomp | ||
| libiberty | ||
| libitm | ||
| libobjc | ||
| libphobos | ||
| libquadmath | ||
| libsanitizer | ||
| libssp | ||
| libstdc++-v3 | ||
| libvtv | ||
| lto-plugin | ||
| maintainer-scripts | ||
| zlib | ||
| .dir-locals.el | ||
| .gitattributes | ||
| .gitignore | ||
| ABOUT-NLS | ||
| ar-lib | ||
| ChangeLog | ||
| ChangeLog.jit | ||
| ChangeLog.tree-ssa | ||
| compile | ||
| config-ml.in | ||
| config.guess | ||
| config.rpath | ||
| config.sub | ||
| configure | ||
| configure.ac | ||
| COPYING | ||
| COPYING3 | ||
| COPYING3.LIB | ||
| COPYING.LIB | ||
| COPYING.RUNTIME | ||
| depcomp | ||
| install-sh | ||
| libtool-ldflags | ||
| libtool.m4 | ||
| lt~obsolete.m4 | ||
| ltgcc.m4 | ||
| ltmain.sh | ||
| ltoptions.m4 | ||
| ltsugar.m4 | ||
| ltversion.m4 | ||
| MAINTAINERS | ||
| Makefile.def | ||
| Makefile.in | ||
| Makefile.tpl | ||
| missing | ||
| mkdep | ||
| mkinstalldirs | ||
| move-if-change | ||
| multilib.am | ||
| README | ||
| SECURITY.txt | ||
| symlink-tree | ||
| test-driver | ||
| ylwrap | ||
This directory contains the GNU Compiler Collection (GCC). The GNU Compiler Collection is free software. See the files whose names start with COPYING for copying permission. The manuals, and some of the runtime libraries, are under different terms; see the individual source files for details. The directory INSTALL contains copies of the installation information as HTML and plain text. The source of this information is gcc/doc/install.texi. The installation information includes details of what is included in the GCC sources and what files GCC installs. See the file gcc/doc/gcc.texi (together with other files that it includes) for usage and porting information. An online readable version of the manual is in the files gcc/doc/gcc.info*. See http://gcc.gnu.org/bugs/ for how to report bugs usefully. Copyright years on GCC source files may be listed using range notation, e.g., 1987-2012, indicating that every year in the range, inclusive, is a copyrightable year that could otherwise be listed individually.