src/cgen ChangeLog decode.scm insn.scm

[brolley at sources dot redhat dot com]

CVSROOT:	/cvs/src
Module name:	src
Changes by:	brolley@sources.redhat.com	2002-01-03 10:30:28

Modified files:
	cgen           : ChangeLog decode.scm insn.scm 

Log message:
	2002-01-03  Dave Brolley  <brolley@redhat.com>
	
	* decode.scm (-distinguishing-bit-population): Compute num-insns, the
	number of insns in the list.  Update the population count function to
	identify and prioritize 3 catgories of useful bits.
	(-population-top-few): Don't consider bits with a population count of
	zero.
	(-build-decode-table-entry): Don't call
	filter-harmlessly-ambiguous-insns.  Filter out non-specialized and
	identical insns at the next tree level.
	* insn.scm (filter-harmlessly-ambiguous-insns): Note in a comment that
	this function is no longer used.
	(filter-non-specialized-ambiguous-insns): New function.
	(filter-identical-ambiguous-insns): New function.
	(find-identical-insn): New function.
	(filter-harmlessly-ambiguous-insns): Removed.

Patches:
http://sources.redhat.com/cgi-bin/cvsweb.cgi/src/cgen/ChangeLog.diff?cvsroot=src&r1=1.90&r2=1.91
http://sources.redhat.com/cgi-bin/cvsweb.cgi/src/cgen/decode.scm.diff?cvsroot=src&r1=1.3&r2=1.4
http://sources.redhat.com/cgi-bin/cvsweb.cgi/src/cgen/insn.scm.diff?cvsroot=src&r1=1.5&r2=1.6