7432f255b7
This patch enables MVE vshlq instructions for auto-vectorization.
The existing mve_vshlq_n_<supf><mode> is kept, as it takes a single
immediate as second operand, and is used by arm_mve.h.
We move the vashl<mode>3 insn from neon.md to an expander in
vec-common.md, and the mve_vshlq_<supf><mode> insn from mve.md to
vec-common.md, adding the second alternative fron neon.md.
mve_vshlq_<supf><mode> will be used by a later patch enabling
vectorization for vshr, as a unified version of
ashl3<mode3>_[signed|unsigned] from neon.md. Keeping the use of unspec
VSHLQ enables to generate both 's' and 'u' variants.
It is not clear whether the neon_shift_[reg|imm]<q> attribute is still
suitable, since this insn is also used for MVE.
I kept the mve_vshlq_<supf><mode> naming instead of renaming it to
ashl3_<supf>_<mode> as discussed because the reference in
arm_mve_builtins.def automatically inserts the "mve_" prefix and I
didn't want to make a special case for this.
I haven't yet found why the v16qi and v8hi tests are not vectorized.
With dest[i] = a[i] << b[i] and:
{
int i;
unsigned int i.24_1;
unsigned int _2;
int16_t * _3;
short int _4;
int _5;
int16_t * _6;
short int _7;
int _8;
int _9;
int16_t * _10;
short int _11;
unsigned int ivtmp_42;
unsigned int ivtmp_43;
<bb 2> [local count: 119292720]:
<bb 3> [local count: 954449105]:
i.24_1 = (unsigned int) i_23;
_2 = i.24_1 * 2;
_3 = a_15(D) + _2;
_4 = *_3;
_5 = (int) _4;
_6 = b_16(D) + _2;
_7 = *_6;
_8 = (int) _7;
_9 = _5 << _8;
_10 = dest_17(D) + _2;
_11 = (short int) _9;
*_10 = _11;
i_19 = i_23 + 1;
ivtmp_42 = ivtmp_43 - 1;
if (ivtmp_42 != 0)
goto <bb 5>; [87.50%]
else
goto <bb 4>; [12.50%]
<bb 5> [local count: 835156386]:
goto <bb 3>; [100.00%]
<bb 4> [local count: 119292720]:
return;
}
the vectorizer says:
mve-vshl.c:37:96: note: ==> examining statement: _5 = (int) _4;
mve-vshl.c:37:96: note: vect_is_simple_use: operand *_3, type of def: internal
mve-vshl.c:37:96: note: vect_is_simple_use: vectype vector(8) short int
mve-vshl.c:37:96: missed: conversion not supported by target.
mve-vshl.c:37:96: note: vect_is_simple_use: operand *_3, type of def: internal
mve-vshl.c:37:96: note: vect_is_simple_use: vectype vector(8) short int
mve-vshl.c:37:96: note: vect_is_simple_use: operand *_3, type of def: internal
mve-vshl.c:37:96: note: vect_is_simple_use: vectype vector(8) short int
mve-vshl.c:37:117: missed: not vectorized: relevant stmt not supported: _5 = (int) _4;
mve-vshl.c:37:96: missed: bad operation or unsupported loop bound.
mve-vshl.c:37:96: note: ***** Analysis failed with vector mode V8HI
2020-12-03 Christophe Lyon <christophe.lyon@linaro.org>
gcc/
* config/arm/mve.md (mve_vshlq_<supf><mode>): Move to
vec-commond.md.
* config/arm/neon.md (vashl<mode>3): Delete.
* config/arm/vec-common.md (mve_vshlq_<supf><mode>): New.
(vasl<mode>3): New expander.
gcc/testsuite/
* gcc.target/arm/simd/mve-vshl.c: Add tests for vshl.
|
||
|---|---|---|
| c++tools | ||
| config | ||
| contrib | ||
| fixincludes | ||
| gcc | ||
| gnattools | ||
| gotools | ||
| include | ||
| INSTALL | ||
| intl | ||
| libada | ||
| libatomic | ||
| libbacktrace | ||
| libcc1 | ||
| libcody | ||
| libcpp | ||
| libdecnumber | ||
| libffi | ||
| libgcc | ||
| libgfortran | ||
| libgo | ||
| libgomp | ||
| libhsail-rt | ||
| libiberty | ||
| libitm | ||
| libobjc | ||
| liboffloadmic | ||
| 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 | ||
| 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.