2 // RMAC - Reboot's Macro Assembler for the Atari Jaguar Console System
3 // PARMODE.C - Addressing Modes Parser Include
4 // Copyright (C) 199x Landon Dyer, 2011 Reboot and Friends
5 // RMAC derived from MADMAC v1.07 Written by Landon Dyer, 1986
6 // Source Utilised with the Kind Permission of Landon Dyer
9 // This file is included (twice) to parse two addressing modes, into slightly different var names
14 if((*tok >= KW_D0) && (*tok <= KW_D7)) {
17 } else if((*tok >= KW_A0) && (*tok <= KW_A7)) {
20 } else if(*tok == '#') {
22 if(expr(AnEXPR, &AnEXVAL, &AnEXATTR, &AnESYM) != OK)
28 // (An,Xn[.siz][*scale])
29 // (PC,Xn[.siz][*scale])
31 // (d8,An,Xn[.siz][*scale])
33 // (d8,PC,Xn[.siz][*scale])
38 else if(*tok == '(') {
40 if((*tok >= KW_A0) && (*tok <= KW_A7)) {
51 goto AMn_IX0; // Handle ",Xn[.siz][*scale])"
52 } else if(*tok == KW_PC) { // (PC,Xn[.siz][*scale])
56 // Common index handler; enter here with `tok' pointing at the comma.
58 AMn_IX0: // Handle indexed with missing expr
61 AnEXATTR = ABS | DEFINED;
63 AMn_IXN: // Handle any indexed (tok -> a comma)
67 if(*tok < KW_D0 || *tok > KW_A7)
69 AnIXREG = *tok++ & 15;
71 switch((int)*tok) { // Index reg size: <empty> | .W | .L
81 case DOTB: // .B not allowed here...
85 if(*tok == '*') { // scale: *1, *2, *4, *8
87 if(*tok++ != CONST || *tok > 8)
107 if(*tok++ != ')') // final ")"
110 } else if(*tok == '[') { // ([...
113 if(expr(AnEXPR, &AnEXVAL, &AnEXATTR, &AnESYM) != OK)
118 if((*tok >= KW_A0) && (*tok <= KW_A7)) {
124 } else if(*tok == ')') {
129 } else if(*tok == KW_PC) {
130 if(*++tok == ',') { // expr(PC,Xn...)
133 } else if(*tok == ')') {
134 AMn = PCDISP; // expr(PC)
140 } else if(*tok=='-' && tok[1]=='(' && ((tok[2]>=KW_A0) && (tok[2]<=KW_A7)) && tok[3]==')') {
144 } else if(*tok == KW_CCR) {
148 } else if(*tok == KW_SR) {
152 } else if(*tok == KW_USP) {
165 if(expr(AnEXPR, &AnEXVAL, &AnEXATTR, &AnESYM) != OK)
168 if(*tok == DOTW) { // expr.W
172 } else if(*tok != '(') { // expr[.L]
174 // Defined, absolute values from $FFFF8000..$00007FFF get optimized to absolute short
175 if((AnEXATTR & (TDB|DEFINED)) == DEFINED && (AnEXVAL + 0x8000) < 0x10000)
178 if(*tok == DOTL) { // force .L
186 if((*tok >= KW_A0) && (*tok <= KW_A7)) {
195 } else if(*tok == KW_PC) {
207 // Addressing mode OK
213 // Cleanup dirty little macros