gcc/gcc ChangeLog.rewrite config/mips/mips.md

[rsandifo@gcc.gnu.org]

CVSROOT:	/cvs/gcc
Module name:	gcc
Branch: 	mips-3_4-rewrite-branch
Changes by:	rsandifo@gcc.gnu.org	2003-03-18 13:09:41

Modified files:
	gcc            : ChangeLog.rewrite 
	gcc/config/mips: mips.md 

Log message:
	* config/mips/mips.md (truncdisi2): Add commentary.  Use sll instead
	of a two-instruction sequence.  Add register->memory alternative.
	(truncdihi2, truncdiqi2): Likewise.
	Rework shift/truncate instructions so that they only handle right
	shifts of 32 (or more, in the case of arithmetic shifts).
	Add patterns for truncate/sign-extend.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.rewrite.diff?cvsroot=gcc&only_with_tag=mips-3_4-rewrite-branch&r1=1.1.2.17&r2=1.1.2.18
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/config/mips/mips.md.diff?cvsroot=gcc&only_with_tag=mips-3_4-rewrite-branch&r1=1.141.6.23&r2=1.141.6.24