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Like is already the case for the AVX/AVX2 form, VMOVDDUP - acting on double precision floating values - is more appropriate to use here, and it can also result in shorter insn encodings when source is memory or %xmm0...%xmm7, and no masking is applied (in allowing a 2-byte VEX prefix then instead of a 3-byte one). gcc/ * config/i386/sse.md (<avx512>_vec_dup<mode><mask_name>): Use vmovddup. |
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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.