mirror of
git://gcc.gnu.org/git/gcc.git
synced 2025-04-17 05:40:26 +08:00
b49f1a7e7c
This patch aims to prevent long sequences loading soft-float constants. For 32-bit, it makes sense to load values inline to a gpr with lis, addi, but not so much for 64-bit where a 5 insn sequence might be needed for each gpr. For TFmode in particular, a 10 insn sequence is reduced to 2 loads from memory plus 1 or 2 address setup insns. * config/rs6000/predicates.md (easy_fp_constant): Avoid long dependent insn sequences. * config/rs6000/rs6000.c (num_insns_constant): Support long double constants. * config/rs6000/rs6000.md (mov<mode>_softfloat <FMOVE128>): Adjust length attribute. From-SVN: r266663
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.