//
// RMAC - Reboot's Macro Assembler for the Atari Jaguar Console System
// PARMODE.C - Addressing Modes Parser Include
-// Copyright (C) 199x Landon Dyer, 2011 Reboot and Friends
+// Copyright (C) 199x Landon Dyer, 2017 Reboot and Friends
// RMAC derived from MADMAC v1.07 Written by Landon Dyer, 1986
// Source utilised with the kind permission of Landon Dyer
//
}
AMn = AINDEXED;
- goto AMn_IX0; // Handle ",Xn[.siz][*scale])"
+ goto AMn_IX0; // Handle ",Xn[.siz][*scale])"
+ }
+ else if ((*tok >= KW_D0) && (*tok <= KW_D7))
+ {
+ //Since index register isn't used here, store register number in this field
+ AnIXREG = *tok++ & 7; // (Dn)
+ if (*tok==')')
+ {
+ tok++;
+ AnEXTEN |= EXT_FULLWORD; // Definitely using full extension format, so set bit 8
+ AnEXTEN |= EXT_BS; // Base register suppressed
+ AnEXTEN |= EXT_BDSIZE0; // Base displacement null
+ AnEXTEN |= EXT_IISPOSN; // Indirect Postindexed with Null Outer Displacement
+ AMn= MEMPOST;
+ AnREG = 6 << 3; // stuff 110 to mode field
+ goto AnOK;
+ }
+ else if (*tok=='L')
+ {
+ // TODO: does DINDL gets used at all?
+ //AMn=DINDL; // (Dn.l)
+ //AnEXTEN = 1 << 1; // Long index size
+ //tok++;
+ }
+ else if (*tok=='W') // (Dn.w)
+ {
+ // TODO: does DINDW gets used at all?
+ //AMn=DINDW;
+ //AnEXTEN = 1 << 1; // Word index size
+ //tok++;
+ }
+ else if (*tok == ',')
+ {
+ // ([bd,An],Xn..) without bd, An
+ // Base displacement is suppressed
+ AnEXTEN |= EXT_FULLWORD; // Definitely using full extension format, so set bit 8
+ AnEXTEN |= EXT_BS; // Base register suppressed
+ AnEXTEN |= EXT_BDSIZE0;
+ AnREG = 6 << 3; // stuff 110 to mode field
+ tok++;
+ goto CHECKODn;
+ }
+ else
+ return error("(Dn) error");
+
+ if (*tok == ')')
+ {
+ tok++;
+ AnEXTEN |= EXT_FULLWORD; // Definitely using full extension format, so set bit 8
+ AnEXTEN |= EXT_BS; // Base register suppressed
+ AnEXTEN |= EXT_BDSIZE0; // Base displacement null
+ AnEXTEN |= EXT_IISPOSN; // Indirect Postindexed with Null Outer Displacement
+ AnREG = 6 << 3; // stuff 110 to mode field
+ AMn = MEMPOST;
+ goto AnOK;
+ }
+ else
+ return error("unhandled so far");
}
else if (*tok == KW_PC)
- { // (PC,Xn[.siz][*scale])
+ { // (PC,Xn[.siz][*scale])
tok++;
AMn = PCINDEXED;
- // Common index handler; enter here with `tok' pointing at the comma.
+ // Common index handler; enter here with 'tok' pointing at the
+ // comma.
- AMn_IX0: // Handle indexed with missing expr
+ AMn_IX0: // Handle indexed with missing expr
AnEXVAL = 0;
AnEXATTR = ABS | DEFINED;
- AMn_IXN: // Handle any indexed (tok -> a comma)
+ AMn_IXN: // Handle any indexed (tok -> a comma)
if (*tok++ != ',')
goto badmode;
AnIXREG = *tok++ & 15;
switch ((int)*tok)
- { // Index reg size: <empty> | .W | .L
+ { // Index reg size: <empty> | .W | .L
case DOTW:
tok++;
default:
AnIXSIZ = 0x0800;
tok++;
break;
- case DOTB: // .B not allowed here...
+ case DOTB: // .B not allowed here...
goto badmode;
}
if (*tok == '*')
- { // scale: *1, *2, *4, *8
+ { // scale: *1, *2, *4, *8
tok++;
if (*tok++ != CONST || *tok > 8)
}
}
- if (*tok++ != ')') // final ")"
+ if (*tok++ != ')') // final ")"
goto badmode;
goto AnOK;
}
else if (*tok == '[')
- { // ([...
- goto unmode;
+ { // ([...
+ tok++;
+ AnEXTEN|=EXT_FULLWORD; //Definitely using full extension format, so set bit 8
+ // Check to see if base displacement is present
+ //WARNING("expr will return a bad expression error here but this is expected, it needs to be silenced!");
+ if (*tok!=CONST && *tok !=SYMBOL)
+ //if (expr(AnBEXPR, &AnBEXVAL, &AnBEXATTR, &AnESYM) != OK)
+ {
+ AnEXTEN|=EXT_BDSIZE0;
+ //tok++;
+ //tok--; //Rewind tok since expr advances it forward
+ }
+ else
+ {
+ expr(AnBEXPR, &AnBEXVAL, &AnBEXATTR, &AnESYM);
+ if (optim_flags[OPT_BASE_DISP] && AnBEXVAL==0 && AnEXATTR!=0)
+ {
+ // bd=0 so let's optimise it out
+ AnEXTEN|=EXT_BDSIZE0;
+ }
+ else if (*tok==DOTL)
+ { // ([bd.l,...
+ AnEXTEN|=EXT_BDSIZEL;
+ tok++;
+ }
+ else
+ { // ([bd[.w],... or ([bd,...
+ // Is .W forced here?
+ if (*tok == DOTW)
+ {
+ AnEXTEN|=EXT_BDSIZEW;
+ tok++;
+ }
+ else
+ {
+ // Defined, absolute values from $FFFF8000..$00007FFF get optimized
+ // to absolute short
+ if (optim_flags[OPT_ABS_SHORT] && (AnBEXATTR & (TDB|DEFINED)) == DEFINED && (AnBEXVAL + 0x8000) < 0x10000)
+ {
+ AnEXTEN|=EXT_BDSIZEW;
+ warn("absolute value in base displacement ranging $FFFF8000..$00007FFF optimised to absolute short");
+ }
+ else
+ {
+ AnEXTEN|=EXT_BDSIZEL;
+ }
+ }
+ }
+ if (*tok==',')
+ tok++;
+ //else
+ // return error("Comma expected after base displacement");
+ }
+
+
+ // Check for address register or PC, suppress base register otherwise
+
+ if (*tok==KW_PC)
+ { // ([bd,PC,...
+ AnREG=(7<<3)|3; // PC is special case - stuff 011 to register field and 111 to the mode field
+ tok++;
+ }
+ else if ((*tok >= KW_A0) && (*tok <= KW_A7))
+ { // ([bd,An,...
+ AnREG = (6<<3)|*tok & 7;
+ tok++;
+ }
+ else if ((*tok >= KW_D0) && (*tok <= KW_D7))
+ { // ([bd,Dn,...
+ AnREG = (6<<3);
+ AnEXTEN|=((*tok&7)<<12);
+ AnEXTEN|=EXT_D;
+ AnEXTEN|=EXT_BS; // Oh look, a data register! Which means that base register is suppressed
+ tok++;
+
+ // Check for size
+ { // ([bd,An/PC],Xn.W/L...)
+ switch ((int)*tok)
+ { // Index reg size: <empty> | .W | .L
+ case DOTW:
+ tok++;
+ break;
+ default:
+ break;
+ case DOTL:
+ AnEXTEN |= EXT_L;
+ tok++;
+ break;
+ case DOTB: // .B not allowed here...
+ goto badmode;
+ }
+ }
+
+ // Check for scale
+ if (*tok=='*') // ([bd,An/PC],Xn*...)
+ {
+ tok++;
+ if (*tok==CONST) // TODO: I suppose the scale is stored as a CONST and nothing else? So prolly the if is not needed?
+ tok++;
+ switch ((int)*tok++)
+ {
+ case 1:
+ break;
+ case 2:
+ AnEXTEN |= EXT_TIMES2;
+ break;
+ case 4:
+ AnEXTEN |= EXT_TIMES4;
+ break;
+ case 8:
+ AnEXTEN |= EXT_TIMES8;
+ break;
+ default:
+ goto badmode;
+ }
+ }
+ if (*tok==']') // ([bd,Dn]...
+ {
+ tok++;
+ goto IS_SUPPRESSEDn;
+ }
+ }
+ else if (*tok==']')
+ {
+ // PC and Xn is suppressed
+ AnREG=6<<3; // stuff 110 to mode field
+ //AnEXTEN|=EXT_BS|EXT_IS;
+ AnEXTEN |= EXT_BS;
+ }
+ else
+ {
+ goto badmode;
+ }
+
+ // At a crossroads here. We can accept either ([bd,An/PC],... or ([bd,An/PC,Xn*scale],...
+ if (*tok==']')
+ { //([bd,An/PC],Xn,od)
+ // Check for Xn
+ tok++;
+ if (*tok==')')
+ { //Xn and od are non existent, get out of jail free card
+ AMn=MEMPRE; // ([bc,An,Xn],od) with no Xn and od
+ AnEXTEN|=EXT_IS|EXT_IISPREN; //Suppress Xn and od
+ tok++;
+ goto AnOK;
+ }
+ else if (*tok!=',')
+ return error("comma expected after ]");
+ else
+ tok++; // eat the comma
+
+ if ((*tok >= KW_A0) && (*tok <= KW_A7))
+ {
+ AnIXREG=((*tok&7)<<12);
+ AnEXTEN|=EXT_A;
+ tok++;
+ }
+ else if ((*tok >= KW_D0) && (*tok <= KW_D7))
+ {
+ AnEXTEN|=((*tok&7)<<12);
+ AnEXTEN|=EXT_D;
+ tok++;
+ }
+ else
+ {
+ //No index found, suppress it
+ AnEXTEN|=EXT_IS;
+ tok--; // Rewind tok to point to the comma
+ goto IS_SUPPRESSEDn; // https://xkcd.com/292/ - what does he know anyway?
+ }
+
+ // Check for size
+ { // ([bd,An/PC],Xn.W/L...)
+ switch ((int)*tok)
+ { // Index reg size: <empty> | .W | .L
+ case DOTW:
+ tok++;
+ break;
+ default:
+ break;
+ case DOTL:
+ AnEXTEN |= EXT_L;
+ tok++;
+ break;
+ case DOTB: // .B not allowed here...
+ goto badmode;
+ }
+ }
+
+ // Check for scale
+ if (*tok=='*') // ([bd,An/PC],Xn*...)
+ {
+ tok++;
+ if (*tok==CONST) // TODO: I suppose the scale is stored as a CONST and nothing else? So prolly the if is not needed?
+ tok++;
+ switch ((int)*tok++)
+ {
+ case 1:
+ break;
+ case 2:
+ AnEXTEN |= EXT_TIMES2;
+ break;
+ case 4:
+ AnEXTEN |= EXT_TIMES4;
+ break;
+ case 8:
+ AnEXTEN |= EXT_TIMES8;
+ break;
+ default:
+ goto badmode;
+ }
+ }
+
+ // Check for od
+ if (*tok==')') // ([bd,An/PC],Xn)
+ { //od is non existant, get out of jail free card
+ AMn=MEMPOST; // let's say it's ([bd,An],Xn,od) with od=0 then
+ AnEXTEN|=EXT_IISPOSN; // No outer displacement
+ tok++;
+ goto AnOK;
+ }
+ else if (*tok!=',')
+ return error("comma expected");
+ else
+ tok++; // eat the comma
+
+ CHECKODn:
+ if (expr(AnEXPR, &AnEXVAL, &AnEXATTR, &AnESYM) != OK)
+ goto badmode;
+ if (optim_flags[OPT_BASE_DISP] && AnEXVAL==0)
+ {
+ // od=0 so optimise it out
+ AMn=MEMPOST; // let's say it's ([bd,An],Xn,od) with od=0 then
+ AnEXTEN|=EXT_IISPOSN; // No outer displacement
+ tok++;
+ goto AnOK;
+ }
+ // ([bd,An/PC],Xn,od)
+ if (*tok == DOTL)
+ {
+ // expr.L
+ AnEXTEN|=EXT_IISPOSL; // Long outer displacement
+ AMn = MEMPOST;
+
+ // Defined, absolute values from $FFFF8000..$00007FFF get optimized
+ // to absolute short
+ if (optim_flags[OPT_ABS_SHORT] && (AnEXATTR & (TDB|DEFINED)) == DEFINED && (AnEXVAL + 0x8000) < 0x10000)
+ {
+ AnEXTEN|=EXT_IISPOSW; // Word outer displacement
+ AMn = MEMPOST;
+ warn("outer displacement absolute value from $FFFF8000..$00007FFF optimised to absolute short");
+ }
+
+ }
+ else
+ {
+ // expr[.W]
+ AnEXTEN|=EXT_IISPOSW; // Word outer displacement
+ AMn = MEMPOST;
+
+ // Is .W forced here?
+ if (*tok == DOTW)
+ {
+ tok++;
+ }
+
+ }
+
+ // Check for final closing parenthesis
+ if (*tok==')')
+ {
+ tok++;
+ goto AnOK;
+ }
+ else
+ return error("Closing parenthesis missing on addressing mode");
+
+ IS_SUPPRESSEDn:
+
+ // Check for od
+ if (*tok==')') // ([bd,An/PC],Xn)
+ { //od is non existant, get out of jail free card
+ AMn=MEMPOST; // let's say it's ([bd,An],Xn,od) with od=0 then
+ AnEXTEN|=EXT_IISNOIN; // No outer displacement
+ tok++;
+ goto AnOK;
+ }
+ else if (*tok!=',')
+ return error("comma expected");
+ else
+ tok++; // eat the comma
+
+ if (*tok != CONST && *tok != SYMBOL)
+ //if (expr(AnEXPR, &AnEXVAL, &AnEXATTR, &AnESYM) != OK)
+ goto badmode;
+ expr(AnEXPR, &AnEXVAL, &AnEXATTR, &AnESYM);
+ if (optim_flags[OPT_BASE_DISP] && AnEXVAL==0)
+ {
+ // od=0 so optimise it out
+ AMn=MEMPOST; // let's say it's ([bd,An],Xn,od) with od=0 then
+ AnEXTEN|=EXT_IISNOIN; // No outer displacement
+ tok++;
+ goto AnOK;
+ }
+ // ([bd,An/PC],Xn,od)
+ if (*tok == DOTL)
+ {
+ // expr.L
+ tok++;
+ AMn = MEMPOST;
+ AnEXTEN|=EXT_IISNOIL; // Long outer displacement with IS suppressed
+ //goto AnOK;
+
+ }
+ else
+ {
+ // expr[.W][]
+ AnEXTEN |= EXT_IISNOIW; // Word outer displacement with IS suppressed
+ AMn = MEMPRE;
+ if (*tok == DOTW)
+ {
+ //AnEXTEN|=EXT_IISNOIW; // Word outer displacement
+ AMn = MEMPOST;
+ tok++;
+ }
+
+ // Defined, absolute values from $FFFF8000..$00007FFF get optimized
+ // to absolute short
+ else if (optim_flags[OPT_BASE_DISP] && (AnEXATTR & (TDB|DEFINED)) == DEFINED && (AnEXVAL + 0x8000) < 0x10000)
+ {
+ //AnEXTEN|=EXT_IISNOIW; // Word outer displacement with IS suppressed
+ warn("outer displacement absolute value from $FFFF8000..$00007FFF optimised to absolute short");
+ }
+
+
+ }
+
+ // Check for final closing parenthesis
+ if (*tok==')')
+ {
+ tok++;
+ goto AnOK;
+ }
+ else
+ return error("Closing parenthesis missing on addressing mode");
+
+ }
+ else if (*tok==',')
+ {
+ *tok++; // ([bd,An,Xn.size*scale],od)
+ //Check for Xn
+ if ((*tok >= KW_A0) && (*tok <= KW_A7))
+ {
+ AnEXTEN|=((*tok&7)<<12);
+ AnEXTEN|=EXT_A;
+ tok++;
+ }
+ else if ((*tok >= KW_D0) && (*tok <= KW_D7))
+ {
+ AnEXTEN|=((*tok&7)<<12);
+ AnEXTEN|=EXT_D;
+ tok++;
+ }
+
+ // Check for size
+ { // ([bd,An/PC],Xn.W/L...)
+ switch ((int)*tok)
+ { // Index reg size: <empty> | .W | .L
+ case DOTW:
+ tok++;
+ break;
+ default:
+ break;
+ case DOTL:
+ tok++;
+ AnEXTEN |= EXT_L;
+ break;
+ case DOTB: // .B not allowed here...
+ goto badmode;
+ }
+
+ }
+
+ // Check for scale
+ if (*tok=='*') // ([bd,An/PC],Xn*...)
+ {
+ tok++;
+ if (*tok==CONST) // TODO: I suppose the scale is stored as a CONST and nothing else? So prolly the if is not needed?
+ tok++;
+ switch ((int)*tok++)
+ {
+ case 1:
+ break;
+ case 2:
+ AnEXTEN |= EXT_TIMES2;
+ break;
+ case 4:
+ AnEXTEN |= EXT_TIMES4;
+ break;
+ case 8:
+ AnEXTEN |= EXT_TIMES8;
+ break;
+ default:
+ goto badmode;
+ }
+ }
+
+ //Check for ]
+ if (*tok!=']')
+ return error("Expected closing bracket ]");
+ tok++; // Eat the bracket
+
+ //Check for od
+ if (*tok==')') // ([bd,An/PC,Xn]...
+ { //od is non existant, get out of jail free card
+ //AnEXVAL=0; // zero outer displacement
+ AMn=MEMPRE; // let's say it's ([bd,An,Xn],od) with od suppressed then
+ AnEXTEN|=EXT_IISPREN; // No outer displacement
+ tok++;
+ goto AnOK;
+ }
+ else if (*tok++!=',')
+ return error("comma expected after ]");
+ WARNING(Put symbol and constant checks here!)
+ if (expr(AnEXPR, &AnEXVAL, &AnEXATTR, &AnESYM) != OK)
+ goto badmode;
+ if (optim_flags[OPT_BASE_DISP] && AnEXVAL==0)
+ {
+ // od=0 so optimise it out
+ AMn=MEMPRE; // let's say it's ([bd,An],Xn,od) with od=0 then
+ AnEXTEN|=EXT_IISPRE0; // No outer displacement
+ tok++;
+ goto AnOK;
+ }
+ // ([bd,An/PC,Xn],od)
+ if (*tok == DOTL)
+ {
+ // expr.L
+ AMn = MEMPRE;
+ tok++;
+
+ AnEXTEN|=EXT_IISPREL;
+
+ }
+ else
+ {
+ // expr.[W]
+ //tok++;
+
+ AnEXTEN|=EXT_IISPREW;
+ AMn = MEMPRE;
+
+ // Is .W forced here?
+ if (*tok == DOTW)
+ {
+ tok++;
+ }
+
+ // Defined, absolute values from $FFFF8000..$00007FFF get optimized
+ // to absolute short
+ else if (optim_flags[OPT_BASE_DISP] && (AnEXATTR & (TDB|DEFINED)) == DEFINED && (AnEXVAL + 0x8000) < 0x10000)
+ {
+ AnEXTEN|=EXT_IISPREW;
+ warn("outer displacement absolute value from $FFFF8000..$00007FFF optimised to absolute short");
+ }
+ }
+
+ // Check for final closing parenthesis
+ if (*tok==')')
+ {
+ tok++;
+ goto AnOK;
+ }
+ else
+ return error("Closing parenthesis missing on addressing mode");
+ }
+ else
+ goto badmode;
+
+ //goto unmode;
}
else
{ // (expr...
goto AMn_IXN;
}
else if (*tok == ')')
- {
- AMn = ADISP;
- tok++;
- goto AnOK;
- }
+ {
+ AMn = ADISP;
+ tok++;
+ goto AnOK;
+ }
else
goto badmode;
}
{
AMn = AM_USP;
tok++;
+ AnREG=2; //Added this for the case of USP used in movec (see CREGlut in mach.c). Hopefully nothing gets broken!
+ goto AnOK;
+ }
+ else if ((*tok>=KW_IC40) && (*tok<=KW_BC40))
+ {
+ AMn=CACHES;
+ AnREG=*tok++-KW_IC40;
+
+ // After a cache keyword only a comma or EOL is allowed
+ if ((*tok!=',') && (*tok!=EOL))
+ return ERROR;
+ goto AnOK;
+ }
+ else if ((*tok>=KW_SFC) && (*tok<=KW_CRP))
+ {
+ AMn=CREG;
+ AnREG=(*tok++)-KW_SFC;
goto AnOK;
}
+ else if ((*tok>=KW_FP0) && (*tok<=KW_FP7))
+ {
+ AMn=FREG;
+ AnREG=(*tok++&7);
+ }
+ else if ((*tok>=KW_FPIAR) && (*tok<=KW_FPCR))
+ {
+ AMn=FPSCR;
+ AnREG=(1<<((*tok++)-KW_FPIAR+10));
+ }
// expr
// expr.w
// expr.l
// expr.W
tok++;
AMn = ABSW;
+
+ if ((AnEXATTR & (TDB|DEFINED)) == DEFINED && (AnEXVAL < 0x10000))
+ AnEXVAL = (int32_t)(int16_t)AnEXVAL; // Sign extend value
+
goto AnOK;
}
else if (*tok != '(')
// Defined, absolute values from $FFFF8000..$00007FFF get optimized
// to absolute short
- if (optim_flag && (AnEXATTR & (TDB|DEFINED)) == DEFINED && (AnEXVAL + 0x8000) < 0x10000)
+ if (optim_flags[OPT_ABS_SHORT] && (AnEXATTR & (TDB|DEFINED)) == DEFINED && (AnEXVAL + 0x8000) < 0x10000)
{
AMn = ABSW;
+
if (sbra_flag)
warn("absolute value from $FFFF8000..$00007FFF optimised to absolute short");
}
#undef AMn_IX0
#undef AMn_IXN
#undef CHK_FOR_DISPn
+#undef AnBEXPR
+#undef AnBEXVAL
+#undef AnBEXATTR
+#undef AnBZISE
+#undef AnEXTEN
+#undef AMn_030
+#undef IS_SUPPRESSEDn
+#undef CHECKODn
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