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Sequences of the form "a | C" and "a ^ C" with C being the positive half of a signed immediate's range with one extra bit set in addition are mapped to ori/xori and one bseti/binvi to avoid using a temporary (and a multi-insn sequence to load C into that temporary). Something similar holds for "a & ~C" being representable as either bclri + bclri or bclri + andi. gcc/ChangeLog: * config/riscv/bitmanip.md (*<or_optab>i<mode>_extrabit): New pattern for binvi+binvi/xori and bseti+bseti/ori (*andi<mode>_extrabit): New pattern for bclri+bclri/andi * config/riscv/iterators.md (any_or): Match or and ior * config/riscv/predicates.md (const_twobits_operand): New predicate. (uimm_extra_bit_operand): New predicate. (uimm_extra_bit_or_twobits): New predicate. (not_uimm_extra_bit_operand): New predicate. (not_uimm_extra_bit_or_nottwobits): New predicate. * config/riscv/riscv.h (UIMM_EXTRA_BIT_OPERAND): Helper for the uimm_extra_bit_operand and not_uimm_extra_bit_operand predicates. gcc/testsuite/ChangeLog: * gcc.target/riscv/zbs-bclri.c: Rename * gcc.target/riscv/zbs-bclri-01.c: Renamed from above. * gcc.target/riscv/zbs-bclri-02.c: New test. * gcc.target/riscv/zbs-binvi.c: New test. * gcc.target/riscv/zbs-bseti.c: New test. |
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| c++tools | ||
| config | ||
| contrib | ||
| fixincludes | ||
| gcc | ||
| gnattools | ||
| gotools | ||
| include | ||
| INSTALL | ||
| intl | ||
| libada | ||
| libatomic | ||
| libbacktrace | ||
| libcc1 | ||
| libcody | ||
| libcpp | ||
| libdecnumber | ||
| libffi | ||
| libgcc | ||
| libgfortran | ||
| 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 | ||
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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.