agsoptimize: add macro passes

agsoptimize: add macro passes

these can be used to replace snippets with cpp macros.

 #define VAR_EQ(VAR, VAL) \
	li mar, VAR \
	memread4 ax \
	subi ax, VAL \
	not ax

 #define VAR_NE(VAR, VAL) \
	li mar, VAR \
	memread4 ax \
	subi ax, VAL

 #define INC_VAR(VAR, VAL) \
	li mar, VAR \
	memread4 ax \
	addi ax, VAL \
	memwrite4 ax

 #define SET_VAR(VAR, VAL) \
	li ax, VAL \
	li mar, VAR \
	memwrite4 ax \

 #define FARCALL0(FUN) \
	setfuncargs 0 \
	li ax, FUN \
	farcall ax \

 #define FARCALL1(FUN, VAL) \
	li ax, VAL \
	farpush ax \
	setfuncargs 1 \
	li ax, FUN \
	farcall ax \
	farsubsp 1 \

 #define OBJCALL0(FN, OBJ) \
	li mar, OBJ \
	mr ax, mar \
	push op \
	callobj ax \
	setfuncargs 0 \
	li ax, FN \
	farcall ax \
	pop op \

 #define OBJCALL1(FN, OBJ, ARG) \
	li bx, ARG \
	li mar, OBJ \
	mr ax, mar \
	push op \
	callobj ax \
	farpush bx \
	setfuncargs 1 \
	li ax, FN \
	farcall ax \
	farsubsp 1 \
	pop op

 #define OBJCALL1_DYNSTR(FN, OBJ, ARG) \
	li ax, ARG \
	newstr ax \
	mr bx, ax \
	li mar, OBJ \
	mr ax, mar \
	push op \
	callobj ax \
	farpush bx \
	setfuncargs 1 \
	li ax, FN \
	farcall ax \
	farsubsp 1 \
	pop op \