//
// RMAC - Reboot's Macro Assembler for all Atari computers
// PARMODE.C - Addressing Modes Parser Include
-// Copyright (C) 199x Landon Dyer, 2011-2017 Reboot and Friends
+// Copyright (C) 199x Landon Dyer, 2011-2020 Reboot and Friends
// RMAC derived from MADMAC v1.07 Written by Landon Dyer, 1986
// Source utilised with the kind permission of Landon Dyer
//
// This file is included (twice) to parse two addressing modes, into slightly
// different var names
{
+ uint64_t scaleval; // Expression's value
+ TOKEN scaleexpr[EXPRSIZE]; // Expression
+ WORD scaleattr; // Expression's attribute
+ SYM * scaleesym; // External symbol involved in expr
+
// Dn
// An
// # expression
// (d8,An,Xn[.siz][*scale])
// (d16,PC)
// (d8,PC,Xn[.siz][*scale])
- // ([bd,An],Xn,od)
- // ([bd,An,Xn],od)
- // ([bd,PC],Xn,od)
- // ([bd,PC,Xn],od)
+ // ([bd,An],Xn[.siz][*scale],od)
+ // ([bd,An,Xn[.siz][*scale]],od)
+ // ([bd,PC],Xn[.siz][*scale],od)
+ // ([bd,PC,Xn[.siz][*scale]],od)
else if (*tok == '(')
{
tok++;
}
else if ((*tok >= KW_D0) && (*tok <= KW_D7))
{
- //Since index register isn't used here, store register number in this field
+ // Since index register isn't used here, store register number in this field
AnIXREG = *tok++ & 7; // (Dn)
+
if (*tok == ')')
{
tok++;
AnEXTEN |= EXT_BS; // Base register suppressed
AnEXTEN |= EXT_BDSIZE0; // Base displacement null
AnEXTEN |= EXT_IISPOSN; // Indirect Postindexed with Null Outer Displacement
- AMn= MEMPOST;
+ 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
+ AMn = DINDL; // (Dn.l)
+ AnEXTEN = 1 << 11; // 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
+ AMn = DINDW;
+ AnEXTEN = 0 << 11; // Word index size
tok++;
}
else if (*tok == ',')
if (*tok == SYMBOL)
{
- if (expr(AnEXPR, &AnEXVAL, &AnEXATTR, &AnESYM) != OK)
+ if (expr(scaleexpr, &scaleval, &scaleattr, &scaleesym) != OK)
return error("scale factor expression must evaluate");
- switch (AnEXVAL)
+ switch (scaleval)
{
case 1:
break;
case 2:
AnIXSIZ |= TIMES2;
+ AnEXTEN |= 1 << 9;
break;
case 4:
AnIXSIZ |= TIMES4;
+ AnEXTEN |= 2 << 9;
break;
case 8:
AnIXSIZ |= TIMES8;
+ AnEXTEN |= 3 << 9;
break;
default:
goto badmode;
}
}
- else if (*tok++ != CONST || *tok > 8)
+ else if (*tok++ != CONST)
goto badmode;
else
{
break;
case 2:
AnIXSIZ |= TIMES2;
+ AnEXTEN |= 1 << 9;
break;
case 4:
AnIXSIZ |= TIMES4;
+ AnEXTEN |= 2 << 9;
break;
case 8:
AnIXSIZ |= TIMES8;
+ AnEXTEN |= 3 << 9;
break;
default:
goto badmode;
}
+
+ tok++; // Take into account that constants are 64-bit
}
}
AMn = MEMPOST;
goto AnOK;
}
- else if (*tok==',')
+ else if (*tok == ',')
{
tok++; // eat the comma
// It might be (Dn[.wl][*scale],od)
// Maybe this is wrong and we have to write some code here
// instead of reusing that path...
+ AnEXTEN |= EXT_FULLWORD; // Definitely using full extension format, so set bit 8
+ AnEXTEN |= EXT_BS; // Base displacement null - suppressed
+ AnEXTEN |= AnIXREG << 12;
goto CHECKODn;
}
else
// 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;
if (*tok == SYMBOL)
{
- if (expr(AnEXPR, &AnEXVAL, &AnEXATTR, &AnESYM) != OK)
+ if (expr(scaleexpr, &scaleval, &scaleattr, &scaleesym) != OK)
return error("scale factor expression must evaluate");
- switch (AnEXVAL)
+
+ switch (scaleval)
{
case 1:
break;
goto badmode;
}
}
- else if (*tok++ != CONST || *tok > 8)
+ else if (*tok++ != CONST)
goto badmode;
else
{
default:
goto badmode;
}
+
+ tok++; // Take into account that constants are 64-bit
}
}
if (*tok == ',')
{
+ // If we got here we didn't get any [] stuff
+ // so let's suppress base displacement before
+ // branching off
tok++;
+ AnEXTEN |= EXT_BDSIZE0; // Base displacement null - suppressed
goto CHECKODn;
}
if (*tok++ != ')') // final ")"
else if (*tok == '[')
{ // ([...
tok++;
- AnEXTEN|=EXT_FULLWORD; //Definitely using full extension format, so set bit 8
+ AnEXTEN |= EXT_FULLWORD; // Definitely using full extension format, so set bit 8
+
// Check to see if base displacement is present
- if (*tok!=CONST && *tok !=SYMBOL)
+ if (*tok != CONST && *tok != SYMBOL)
{
- AnEXTEN|=EXT_BDSIZE0;
+ AnEXTEN |= EXT_BDSIZE0;
}
else
{
expr(AnBEXPR, &AnBEXVAL, &AnBEXATTR, &AnESYM);
- if (CHECK_OPTS(OPT_BASE_DISP) && AnBEXVAL==0 && AnEXATTR!=0)
+
+ if (CHECK_OPTS(OPT_020_DISP) && (AnBEXVAL == 0) && (AnEXATTR != 0))
{
- // bd=0 so let's optimise it out
- AnEXTEN|=EXT_BDSIZE0;
+ // bd = 0 so let's optimise it out
+ AnEXTEN |= EXT_BDSIZE0;
}
- else if (*tok==DOTL)
- { // ([bd.l,...
- AnEXTEN|=EXT_BDSIZEL;
- tok++;
+ else if (*tok == DOTL)
+ {
+ // ([bd.l,...
+ AnEXTEN |= EXT_BDSIZEL;
+ tok++;
}
else
- { // ([bd[.w],... or ([bd,...
+ {
+ // ([bd[.w],... or ([bd,...
// Is .W forced here?
if (*tok == DOTW)
{
- AnEXTEN|=EXT_BDSIZEW;
+ AnEXTEN |= EXT_BDSIZEW;
tok++;
}
else
{
- // Defined, absolute values from $FFFF8000..$00007FFF get optimized
- // to absolute short
- if (CHECK_OPTS(OPT_ABS_SHORT)
+ // Defined, absolute values from $FFFF8000..$00007FFF
+ // get optimized to absolute short
+ if (CHECK_OPTS(OPT_020_DISP)
&& ((AnBEXATTR & (TDB | DEFINED)) == DEFINED)
- && ((AnBEXVAL + 0x8000) < 0x10000))
+ && (((uint32_t)AnBEXVAL + 0x8000) < 0x10000))
{
AnEXTEN |= EXT_BDSIZEW;
- warn("absolute value in base displacement ranging $FFFF8000..$00007FFF optimised to absolute short");
+
+ if (optim_warn_flag)
+ warn("absolute value in base displacement ranging $FFFF8000..$00007FFF optimised to absolute short");
}
else
{
}
else if ((*tok >= KW_A0) && (*tok <= KW_A7))
{ // ([bd,An,...
- AnREG = (6<<3)|*tok & 7;
+ AnREG = (6 << 3) | (*tok & 7);
tok++;
}
else if ((*tok >= KW_D0) && (*tok <= KW_D7))
tok++;
// Check for size
+ // ([bd,An/PC],Xn.W/L...)
+ switch ((int)*tok)
{
- // ([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;
- }
+ // 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 == SYMBOL)
{
- if (expr(AnEXPR, &AnEXVAL, &AnEXATTR, &AnESYM) != OK)
+ if (expr(scaleexpr, &scaleval, &scaleattr, &scaleesym) != OK)
return error("scale factor expression must evaluate");
- switch (AnEXVAL)
+
+ switch (scaleval)
{
case 1:
break;
goto badmode;
}
}
- else if (*tok++ != CONST || *tok > 8)
+ else if (*tok++ != CONST)
goto badmode;
else
{
default:
goto badmode;
}
+
+ tok++; // Take into account that constants are 64-bit
}
}
if (*tok == ']') // ([bd,Dn]...
else if (*tok == ']')
{
// PC and Xn is suppressed
- AnREG = 6 << 3; // stuff 110 to mode field
- //AnEXTEN|=EXT_BS|EXT_IS;
+ AnREG = 6 << 3; // stuff 110b to mode field
AnEXTEN |= EXT_BS;
}
else
// At a crossroads here. We can accept either ([bd,An/PC],... or ([bd,An/PC,Xn*scale],...
if (*tok == ']')
{
- //([bd,An/PC],Xn,od)
+ // ([bd,An/PC],Xn,od)
// Check for Xn
tok++;
if (*tok == ')')
{
- //Xn and od are non existent, get out of jail free card
+ // Xn and od are non existent, get out of jail free card
tok++;
AMn = MEMPRE; // ([bc,An,Xn],od) with no Xn and od
- AnEXTEN |= EXT_IS | EXT_IISPREN; //Suppress Xn and od
+ AnEXTEN |= EXT_IS | EXT_IISPREN; // Suppress Xn and od
goto AnOK;
}
else if (*tok != ',')
}
else
{
- //No index found, suppress it
+ // 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)
{
- // ([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;
- }
+ // 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 == SYMBOL)
{
- if (expr(AnEXPR, &AnEXVAL, &AnEXATTR, &AnESYM) != OK)
+ if (expr(scaleexpr, &scaleval, &scaleattr, &scaleesym) != OK)
return error("scale factor expression must evaluate");
- switch (AnEXVAL)
+ switch (scaleval)
{
case 1:
break;
goto badmode;
}
}
- else if (*tok++ != CONST || *tok > 8)
+ else if (*tok++ != CONST)
goto badmode;
else
{
default:
goto badmode;
}
+
+ tok++; // Take into account that constants are 64-bit
}
}
// Check for od
if (*tok == ')') // ([bd,An/PC],Xn)
{
- //od is non existant, get out of jail free card
+ // od is non existent, 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!=',')
+ else if (*tok != ',')
return error("comma expected");
else
tok++; // eat the comma
- CHECKODn:
+CHECKODn:
if (expr(AnEXPR, &AnEXVAL, &AnEXATTR, &AnESYM) != OK)
goto badmode;
- if (CHECK_OPTS(OPT_BASE_DISP) && (AnEXVAL == 0))
+ if (CHECK_OPTS(OPT_020_DISP) && (AnEXATTR & DEFINED) && (AnEXVAL == 0))
{
- // od=0 so optimise it out
+ // 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)
+ // Is .W forced here?
+ if (*tok == DOTW)
{
- // expr.L
- AnEXTEN |= EXT_IISPOSL; // Long outer displacement
- AMn = MEMPOST;
tok++;
+ // od[.W]
+ AnEXTEN |= EXT_IISPOSW; // Word outer displacement
+ AMn = MEMPOST;
+ }
+ else
+ {
+ // Is .L forced here?
+ if (*tok == DOTL)
+ tok++; // Doesn't matter, we're going for .L anyway
- // Defined, absolute values from $FFFF8000..$00007FFF get
- // optimized to absolute short
- if (CHECK_OPTS(OPT_ABS_SHORT)
- && ((AnEXATTR & (TDB | DEFINED)) == DEFINED)
- && ((AnEXVAL + 0x8000) < 0x10000))
+ // od.L
+ if (!(AnEXTEN & EXT_BS))
+ AnEXTEN |= EXT_IISPOSL; // Long outer displacement
+ else
{
- AnEXTEN |= EXT_IISPOSW; // Word outer displacement
- AMn = MEMPOST;
- warn("outer displacement absolute value from $FFFF8000..$00007FFF optimised to absolute short");
+ // bd is suppressed, so sticking the od size in bd
+ AnEXTEN |= EXT_BDSIZEL;
+ // And of course the expression has to be copied to
+ // AnBEXPR instead of AnEXPR. Yay. :-/
+ int i = 0;
+
+ do
+ {
+ AnBEXPR[i] = AnEXPR[i];
+ i++;
+ } while (AnEXPR[i] != 'E');
+
+ AnBEXPR[i] = 'E';
}
- }
- else
- {
- // expr[.W]
- AnEXTEN |= EXT_IISPOSW; // Word outer displacement
AMn = MEMPOST;
- // Is .W forced here?
- if (*tok == DOTW)
+ // Defined, absolute values from $FFFF8000..$00007FFF get
+ // optimized to absolute short
+ if (CHECK_OPTS(OPT_020_DISP)
+ && ((AnEXATTR & (TDB | DEFINED)) == DEFINED)
+ && (((uint32_t)AnEXVAL + 0x8000) < 0x10000))
{
- tok++;
+ AnEXTEN |= EXT_IISPOSW; // Word outer displacement
+ AMn = MEMPOST;
+ if (optim_warn_flag)
+ warn("absolute value in outer displacement ranging $FFFF8000..$00007FFF optimised to absolute short");
}
}
else
return error("Closing parenthesis missing on addressing mode");
- IS_SUPPRESSEDn:
+IS_SUPPRESSEDn:
// Check for od
if (*tok == ')') // ([bd,An/PC],Xn)
{
- //od is non existant, get out of jail free card
+ // od is non existent, 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++;
else
tok++; // eat the comma
- if ((*tok != CONST) && (*tok != SYMBOL))
+ if ((*tok != CONST) && (*tok != SYMBOL))
goto badmode;
expr(AnEXPR, &AnEXVAL, &AnEXATTR, &AnESYM);
- if (CHECK_OPTS(OPT_BASE_DISP) && (AnEXVAL == 0))
+ if (CHECK_OPTS(OPT_020_DISP) && (AnEXVAL == 0))
{
// od=0 so optimise it out
AMn = MEMPOST; // let's say it's ([bd,An],Xn,od) with od=0 then
// 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 (CHECK_OPTS(OPT_BASE_DISP)
+ else if (CHECK_OPTS(OPT_020_DISP)
&& ((AnEXATTR & (TDB | DEFINED)) == DEFINED)
- && ((AnEXVAL + 0x8000) < 0x10000))
+ && (((uint32_t)AnEXVAL + 0x8000) < 0x10000))
{
//AnEXTEN|=EXT_IISNOIW; // Word outer displacement with IS suppressed
- warn("outer displacement absolute value from $FFFF8000..$00007FFF optimised to absolute short");
+ if (optim_warn_flag)
+ warn("outer displacement absolute value from $FFFF8000..$00007FFF optimised to absolute short");
}
}
}
else if (*tok == ',')
{
- *tok++; // ([bd,An,Xn.size*scale],od)
+ tok++; // ([bd,An,Xn.size*scale],od)
- //Check for Xn
+ // Check for Xn
if ((*tok >= KW_A0) && (*tok <= KW_A7))
{
AnEXTEN |= ((*tok & 7) << 12);
}
// Check for size
+ // ([bd,An/PC],Xn.W/L...)
+ switch ((int)*tok)
{
- // ([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;
- }
+ // 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*...)
- { // scale: *1, *2, *4, *8
+ if (*tok == '*') // ([bd,An/PC],Xn*...)
+ { // scale: *1, *2, *4, *8
tok++;
if (*tok == SYMBOL)
{
- if (expr(AnEXPR, &AnEXVAL, &AnEXATTR, &AnESYM) != OK)
+ if (expr(scaleexpr, &scaleval, &scaleattr, &scaleesym) != OK)
return error("scale factor expression must evaluate");
- switch (AnEXVAL)
+
+ switch (scaleval)
{
case 1:
break;
goto badmode;
}
}
- else if (*tok++ != CONST || *tok > 8)
+ else if (*tok++ != CONST)
goto badmode;
else
{
break;
case 2:
AnIXSIZ |= TIMES2;
+ AnEXTEN |= 1 << 9;
break;
case 4:
AnIXSIZ |= TIMES4;
+ AnEXTEN |= 2 << 9;
break;
case 8:
AnIXSIZ |= TIMES8;
+ AnEXTEN |= 3 << 9;
break;
default:
goto badmode;
}
+
+ tok++; // Take into account that constants are 64-bit
}
}
- //Check for ]
+ // Check for ]
if (*tok != ']')
return error("Expected closing bracket ]");
tok++; // Eat the bracket
- //Check for od
+ // Check for od
if (*tok == ')') // ([bd,An/PC,Xn]...
{
- //od is non existant, get out of jail free card
+ // od is non existent, 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++ != ',')
+ else if (*tok++ != ',')
return error("comma expected after ]");
- if (*tok == SYMBOL || *tok == CONST)
- {
- if (expr(AnEXPR, &AnEXVAL, &AnEXATTR, &AnESYM) != OK)
- goto badmode;
-
- if (CHECK_OPTS(OPT_BASE_DISP) && (AnEXVAL == 0) && (AnEXATTR & DEFINED))
+ if (*tok == SYMBOL || *tok == CONST)
{
- // 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;
+ if (expr(AnEXPR, &AnEXVAL, &AnEXATTR, &AnESYM) != OK)
+ goto badmode;
+
+ if (CHECK_OPTS(OPT_020_DISP) && (AnEXVAL == 0) && (AnEXATTR & DEFINED))
+ {
+ // 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)
else
{
// expr.[W]
- int expr_size;
-
AMn = MEMPRE;
- expr_size = EXT_IISPREW; // Assume we have a .w value
+ int expr_size = EXT_IISPREW; // Assume we have a .w value
- if ((AnEXVAL + 0x8000) > 0x10000)
+ if ((AnEXVAL + 0x8000) > 0x10000)
{
- // Long value, so mark it as such for now
- expr_size = EXT_IISPREL;
- // Defined, absolute values from $FFFF8000..$00007FFF get optimized
- // to absolute short
- if (CHECK_OPTS(OPT_BASE_DISP)
- && ((AnEXATTR & (TDB | DEFINED)) == DEFINED)
- && ((AnEXVAL + 0x8000) < 0x10000))
- {
- expr_size = EXT_IISPREW;
- warn("outer displacement absolute value from $FFFF8000..$00007FFF optimised to absolute short");
+ // Long value, so mark it as such for now
+ expr_size = EXT_IISPREL;
+
+ // Defined, absolute values from $FFFF8000..$00007FFF
+ // get optimized to absolute short
+ if (CHECK_OPTS(OPT_020_DISP)
+ && ((AnEXATTR & (TDB | DEFINED)) == DEFINED)
+ && (((uint32_t)AnEXVAL + 0x8000) < 0x10000))
+ {
+ expr_size = EXT_IISPREW;
+
+ if (optim_warn_flag)
+ warn("outer displacement absolute value from $FFFF8000..$00007FFF optimised to absolute short");
+ }
}
- }
- AnEXTEN |= expr_size; // Assume we have a .w value
+ AnEXTEN |= expr_size; // Assume we have a .w value
- // Is .W forced here?
+ // Is .W forced here?
if (*tok == DOTW)
{
tok++;
- if (expr_size == EXT_IISPREL)
- return error("outer displacement value does not fit in .w size");
- }
+ if (expr_size == EXT_IISPREL)
+ return error("outer displacement value does not fit in .w size");
+ }
}
// Check for final closing parenthesis
if (*tok == ',')
{
+ // Check if we're actually doing d8(An,Dn) or
+ // (d16,An,Dn[.size][*scale])
+ // TODO: not a very clear cut case from what I can think.
+ // The only way to distinguish between the two is to check
+ // AnEXVAL and see if it's >127 or <-128. But this doesn't
+ // work if AnEXVAL isn't defined yet. For now we fall
+ // through to d8(An,Dn) but this might bite us in the arse
+ // during fixups...
+ if ((AnEXATTR & DEFINED) && (AnEXVAL + 0x80 > 0x100))
+ {
+ // We're going to treat it as a full extension format
+ // with no indirect access and no base displacement/
+ // index register suppression
+ AnEXTEN |= EXT_FULLWORD; // Definitely using full extension format, so set bit 8
+ AnEXTEN |= EXT_IISPRE0; // No Memory Indirect Action
+ AnEXTEN |= EXT_BDSIZEL; // Base Displacement Size Long
+ tok++; // Get past the comma
+
+ // Our expression is techically a base displacement,
+ // so let's copy it to the relevant variables so
+ // eagen0.c can pick it up properly
+ //AnBEXPR = AnEXPR;
+ AnBEXVAL = AnEXVAL;
+ AnBEXATTR = AnEXATTR;
+
+ if ((*tok >= KW_D0) && (*tok <= KW_D7))
+ {
+ AnEXTEN |= ((*tok++) & 7) << 12;
+ // Check for size
+ {
+ 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*...)
+ { // scale: *1, *2, *4, *8
+ tok++;
+
+ if (*tok == SYMBOL)
+ {
+ if (expr(scaleexpr, &scaleval, &scaleattr, &scaleesym) != OK)
+ return error("scale factor expression must evaluate");
+
+ switch (scaleval)
+ {
+ case 1:
+ break;
+ case 2:
+ AnIXSIZ |= TIMES2;
+ break;
+ case 4:
+ AnIXSIZ |= TIMES4;
+ break;
+ case 8:
+ AnIXSIZ |= TIMES8;
+ break;
+ default:
+ goto badmode;
+ }
+ }
+ else if (*tok++ != CONST)
+ goto badmode;
+ else
+ {
+ switch ((int)*tok++)
+ {
+ case 1:
+ break;
+ case 2:
+ AnIXSIZ |= TIMES2;
+ break;
+ case 4:
+ AnIXSIZ |= TIMES4;
+ break;
+ case 8:
+ AnIXSIZ |= TIMES8;
+ break;
+ default:
+ goto badmode;
+ }
+
+ tok++; // Take into account that constants are 64-bit
+ }
+ }
+
+ if (*tok++ != ')')
+ return error("Closing parenthesis missing on addressing mode");
+
+ // Let's say that this is the closest to our case
+ AMn = MEMPOST;
+ goto AnOK;
+ }
+ else
+ goto badmode;
+ }
+
AMn = AINDEXED;
goto AMn_IXN;
}
{
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!
+ 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))
// expr[.L]
AMn = ABSL;
- // Defined, absolute values from $FFFF8000..$00007FFF get optimized
- // to absolute short
- if (CHECK_OPTS(OPT_ABS_SHORT)
- && ((AnEXATTR & (TDB | DEFINED)) == DEFINED)
- && ((AnEXVAL + 0x8000) < 0x10000))
- {
- AMn = ABSW;
+ // When PC relative is enforced, check for any symbols that aren't
+ // EQU'd, in this case it's an illegal mode
+ if ((CHECK_OPTS(OPT_PC_RELATIVE)) && (AnEXATTR & REFERENCED) && (AnEXATTR & DEFINED) && (!(AnEXATTR & EQUATED)))
+ return error("relocation not allowed");
- if (sbra_flag)
- warn("absolute value from $FFFF8000..$00007FFF optimised to absolute short");
- }
-
- // Is .L forced here?
+ // .L is forced here
if (*tok == DOTL)
{
tok++;
AMn = ABSL;
}
+ else
+ {
+ // Defined, absolute values from $FFFF8000..$00007FFF get
+ // optimized to absolute short
+ if (CHECK_OPTS(OPT_ABS_SHORT)
+ && ((AnEXATTR & (TDB | DEFINED)) == DEFINED)
+ && (((uint32_t)AnEXVAL + 0x8000) < 0x10000))
+ {
+ AMn = ABSW;
+
+ if (optim_warn_flag)
+ warn("absolute value from $FFFF8000..$00007FFF optimised to absolute short");
+ }
+ }
goto AnOK;
}
projects / rmac / blobdiff