[M3commit] CVS Update: cm3

[Jay Krell]

CVSROOT:	/usr/cvs
Changes by:	jkrell at birch.	10/02/26 13:48:34

Modified files:
	cm3/m3-sys/m3back/src/: Codex86.i3 Codex86.m3 M3x86.m3 
	                        M3x86Rep.i3 Stackx86.i3 Stackx86.m3 
	                        Wrx86.i3 Wrx86.m3 m3makefile 
	cm3/m3-sys/m3middle/src/: TInt.i3 TInt.m3 TIntN.i3 TIntN.m3 
	                          TWordN.i3 TWordN.m3 Target.i3 
	                          Target.m3 m3makefile 
Removed files:
	cm3/m3-sys/m3back/src/: M3BackInt.i3 M3BackInt.m3 M3BackWord.i3 
	                        M3BackWord.m3 

Log message:
	introduce type Target.IntN which is Int plus a precision
	just like the old Target.Int
	(previously M3BackInt.Int)
	
	make TIntN and TWordN support it
	they are just thin wrappers over TInt, TWord
	previously named M3BackInt, M3BackWord
	
	add small amount of support to TInt:
	SignExtend, SignedTruncate, ZeroExtend, UnsignedTruncate
	These could, if desired, go into their only users: TIntN, TWordN.
	(with the understanding that that Target.Int is "revealed" to them.)
	
	add maxN, minN fields to Target.Int_type, that are equal to max and min but have a precision
	
	NOTE: Don't worry Tony, the vast majority of m3middle, m3front, TInt, Tword are unchanged
	This is "just" additions.
	(Moving maintenance cost from m3back to m3middle, if that isn't a no-op.)
	(Coming up with alternate names for M3BackInt, M3BackWord => TIntN, TWordN)
	(A little unsatisfactory that N is bytes instead of bits.)
	(What a fun little exercise that might be, changing Int to be array [0..63] of [0..1] :) )
	
	While at it, in TIntN, rename things slightly:
	FromInt => FromHostInteger
	ToInt => ToHostInteger
	
	"Int" is "Target.Int"
	"HostInteger" is "INTEGER"
	
	again, TInt/TWord/m3front/m3middle not much affected.
	
	One fishy/uncertain thing in all of this, something to test out, is cross builds
	that target NT386 from 64bit host. Is TIntN.ToHostInteger correct? Or do we
	really need INTEGER to be 4 bytes throughout m3back?
	(I know that mklib has little endian dependency.)