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The SVE patterns used an UNSPEC_MERGE_PTRUE unspec to attach a predicate to an otherwise unpredicated integer arithmetic operation. As its name suggests, this was designed to be a wrapper used for merging instructions in which the predicate is known to be a PTRUE. This unspec dates from the very early days of the port and nothing has ever taken advantage of the PTRUE guarantee for arithmetic (as opposed to comparisons). This patch replaces it with the less stringent guarantee that: (a) the values of inactive lanes don't matter and (b) it is valid to make extra lanes active if there's a specific benefit Doing this makes the patterns suitable for the ACLE _x functions, which have the above semantics. See the block comment in the patch for more details. 2019-08-14 Richard Sandiford <richard.sandiford@arm.com> gcc/ * config/aarch64/aarch64.md (UNSPEC_PRED_X): New unspec. * config/aarch64/aarch64-sve.md: Add a section describing it. (@aarch64_pred_mov<mode>, @aarch64_pred_mov<mode>) (<SVE_INT_UNARY:optab><mode>2, *<SVE_INT_UNARY:optab><mode>2) (aarch64_<su>abd<mode>_3, mul<SVE_I:mode>3, *mul<SVE_I:mode>3) (<su>mul<mode>3_highpart, *<su>mul<mode>3_highpart) (<SVE_INT_BINARY:optab><mode>3, *<SVE_INT_BINARY:optab><mode>3) (*bic<mode>3, v<ASHIFT:optab><mode>3, *v<ASHIFT:optab><mode>3) (<su><maxmin><mode>3, *<su><maxmin><mode>3, *madd<SVE_I:mode>) (*msub<SVE_I:mode>3, *aarch64_sve_rev64<mode>) (*aarch64_sve_rev32<mode>, *aarch64_sve_rev16vnx16qi): Use UNSPEC_PRED_X instead of UNSPEC_MERGE_PTRUE. * config/aarch64/aarch64-sve2.md (<u>avg<mode>3_floor) (<u>avg<mode>3_ceil, *<sur>h<addsub><mode>): Likewise. * config/aarch64/aarch64.c (aarch64_split_sve_subreg_move) (aarch64_evpc_rev_local): Update accordingly. From-SVN: r274425 |
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| libgomp | ||
| libhsail-rt | ||
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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.