Uros Bizjak fa681e3960 i386.h (x86_use_xchgb): New.
* config/i386/i386.h (x86_use_xchgb): New.
        (TARGET_USE_XCHGB): New macro.
        * config/i386/i386.c (x86_use_xchgb): Set for PENT4.
        * config/i386/i386.md (*rotlhi3_1 splitter, *rotrhi3_1 splitter):
        Split after reload into bswaphi for shifts of 8.
        (bswaphi_lowpart): Generate rolw insn for HImode byte swaps.
        (*bswaphi_lowpart_1): Generate xchgb for Q registers for TARGET_XCHGB
        or when optimizing for size.

testsuite/ChangeLog:

        * gcc.target/i386/builtin-bswap-1.c: Remove -march=nocona.
        * gcc.target/i386/builtin-bswap-3.c: Ditto.
        * gcc.target/i386/xchg-1.c: New test.
        * gcc.target/i386/xchg-2.c: New test.

From-SVN: r122049
2007-02-16 19:36:01 +01:00
2007-02-10 12:44:12 +00:00
2007-02-16 19:36:01 +01:00
2007-01-29 23:01:35 +00:00
2007-02-07 14:35:17 +01:00
2007-01-31 15:05:50 -05:00
2007-02-07 14:35:17 +01:00
2006-11-01 05:28:41 +00:00
2006-10-15 07:42:57 +00:00
2005-07-16 02:30:53 +00:00
2007-02-09 16:31:28 +00:00
2006-01-03 00:30:27 +00:00
2005-07-16 02:30:53 +00:00
2005-07-16 02:30:53 +00:00
2005-07-16 02:30:53 +00:00
2007-02-09 16:35:29 +00:00
2005-11-21 13:21:37 +11:00

This directory contains the GNU Compiler Collection (GCC).

The GNU Compiler Collection is free software.  See the file COPYING
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libraries, are under different terms; see the individual source files
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The directory INSTALL contains copies of the installation information
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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.html for how to report bugs usefully.
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