1 line
23 KiB
Plaintext
1 line
23 KiB
Plaintext
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;..............................................................................
;
; StyleWare Macros`
;
; Macros...: AddWord, AddLong, SubWord, SubLong
; Author...: Mike Hibbetts, (2.0 conversion Scott Lindsey)
; Date.....: June 30, 1987 ... Oct 22,1988
; Version..: 2.0
;
; The following is a short description of the available addressing
; modes that may be used with the math macros in m16.math.
;
; Notes: 'a', 'x', and 'y' denote the 65816 registers.
; 's' denotes that an operand is to be either pulled or pushed.
;
; For programmer based optimization, it should be noted that all zero
; page indirect indexing is done out of the 'y' register, and all other
; indexing is done out of the 'x' register. So, for example,
;
; AddLong Addr:#4,[zp]:#4,>Long
; is better coded as
; ldy #4
; AddLong Addr:y,[zp]:y,>Long,
; (it saves on 1 'ldx')
; and
;
; SubLong Addr1:#offset1,>Long:#offset2,Addr3
; is better coded as
; ldy #offset2
; SubLong Addr1:#offset1,>Long:y,Addr3.
; (it saves on 3 'ldx' and costs 1 'ldy')
;
; All other optimizations have been done internally to the macros.
;.............................................................................
;
; Where
;
; P = { Addr, Addr:#offset, Addr:offset, Addr:x, Addr:y,
; [zp], [zp]:#offset, [zp]:offset, [zp]:y, zp:s
; Long, Long:#offset, Long:offset, Long:x, s },
;
; Q = { a, x, y, #const } + P,
;
; R = { #const } + P, and
;
; T = { a, x, y } + P,
;
; all
;
; AddWord Q,R,T
; AddLong Q,R,P
; SubWord Q,R,T
; SubLong Q,R,P
;
; are allowed.
;
;-----------------------------------------------------------------------------
MACRO
&lab AddWord &term1,&term2,&dest
&lab ;
Arith 2,adc,clc,&term1,&term2,&dest
MEND
MACRO
&lab Addw &term1,&term2,&dest
&lab
AddWord &term1,&term2,&dest
MEND
;----------------------------------------------------------------------------
MACRO
&lab AddLong &term1,&term2,&dest
&lab ;
Arith 4,adc,clc,&term1,&term2,&dest
MEND
MACRO
&lab AddL &term1,&term2,&dest
&lab
AddLong &term1,&term2,&dest
MEND
;----------------------------------------------------------------------------
MACRO
&lab SubWord &term1,&term2,&dest
&lab ;
Arith 2,sbc,sec,&term1,&term2,&dest
MEND
MACRO
&lab Subw &term1,&term2,&dest
&lab
SubWord &term1,&term2,&dest
MEND
;----------------------------------------------------------------------------
MACRO
&lab SubLong &term1,&term2,&dest
&lab ;
Arith 4,sbc,sec,&term1,&term2,&dest
MEND
MACRO
&lab Subl &term1,&term2,&dest
&lab
SubLong &term1,&term2,&dest
MEND
;----------------------------------------------------------------------------
MACRO
Arith &length,&op1,&op2,&term1,&term2,&dest
gbla &same
gbla &Yinc
gblc &lastX
gblc &lastY
gbla &OFFinc
gblc &pushed
&same SETA 0
&OFFinc SETA 0
&Yinc SETA 0
&pushed SETC ''
&lastX SETC ''
&lastY SETC ''
lcla &colon
lcla &stack1
lcla &pull1
lcla &pull2
lcla &zp1
lcla &zp2
lcla &zp3
lclc &addr1
lclc &off1
lclc &addr2
lclc &off2
lclc &addr3
lclc &off3
lclc &badreg
&badreg SETC 'y'
lclc &jump1
lclc &jump2
lclc &jump3
IF &substr(&term1,1,1)<29>'[' GOTO .doterm12
&zp1 seta 1
.doterm12
&colon seta &pos(':',&term1)
IF &colon=0 GOTO .no1offset
&off1 SETC &substr(
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