#define DEF_KW // Declare keyword values
#include "kwtab.h" // Incl generated keyword tables & defs
-static char tokcl[128]; // Generated table of token classes
+static char tokenClass[128]; // Generated table of token classes
static VALUE evstk[EVSTACKSIZE]; // Evaluator value stack
static WORD evattr[EVSTACKSIZE]; // Evaluator attribute stack
const char str_error[] = "missing symbol or string";
// Convert expression to postfix
-static TOKEN * tk; // Deposit tokens here (this is really a
+static TOKEN * evalTokenBuffer; // Deposit tokens here (this is really a
// pointer to exprbuf from direct.c)
+ // (Can also be from others, like riscasm.c)
static symbolNum; // Pointer to the entry in symbolPtr[]
int i; // Iterator
char * p; // Token pointer
- // Initialize token-class table
- for(i=0; i<128; i++) // Mark all entries END
- tokcl[i] = END;
+ // Initialize token-class table (all set to END)
+ for(i=0; i<128; i++)
+ tokenClass[i] = END;
for(i=0, p=itokcl; *p!=1; p++)
{
if (*p == 0)
i++;
else
- tokcl[(int)(*p)] = (char)i;
+ tokenClass[(int)(*p)] = (char)i;
}
symbolNum = 0;
if (expr1() != OK)
return ERROR;
- while (tokcl[*tok] >= MULT)
+ while (tokenClass[*tok] >= MULT)
{
t = *tok++;
if (expr1() != OK)
return ERROR;
- *tk++ = t;
+ *evalTokenBuffer++ = t;
}
return OK;
WORD w;
int j;
- class = tokcl[*tok];
+ class = tokenClass[*tok];
if (*tok == '-' || class == UNARY)
{
if (t == '-')
t = UNMINUS;
- *tk++ = t;
+ *evalTokenBuffer++ = t;
}
else if (class == SUNARY)
{
switch ((int)*tok++)
{
case CR_TIME:
- *tk++ = CONST;
- *tk++ = dos_time();
+ *evalTokenBuffer++ = CONST;
+ *evalTokenBuffer++ = dos_time();
break;
case CR_DATE:
- *tk++ = CONST;
- *tk++ = dos_date();
+ *evalTokenBuffer++ = CONST;
+ *evalTokenBuffer++ = dos_date();
break;
case CR_MACDEF: // ^^macdef <macro-name>
if (*tok++ != SYMBOL)
return error(missym_error);
-#if 0
- p = (char *)*tok++;
-#else
p = string[*tok++];
-#endif
w = (lookup(p, MACRO, 0) == NULL ? 0 : 1);
- *tk++ = CONST;
- *tk++ = (TOKEN)w;
+ *evalTokenBuffer++ = CONST;
+ *evalTokenBuffer++ = (TOKEN)w;
break;
case CR_DEFINED:
w = DEFINED;
if (*tok++ != SYMBOL)
return error(missym_error);
-#if 0
- p = (char *)*tok++;
-#else
p = string[*tok++];
-#endif
- j = 0;
-
- if (*p == '.')
- j = curenv;
-
+ j = (*p == '.' ? curenv : 0);
w = ((sy = lookup(p, LABEL, j)) != NULL && (sy->sattr & w) ? 1 : 0);
- *tk++ = CONST;
- *tk++ = (TOKEN)w;
+ *evalTokenBuffer++ = CONST;
+ *evalTokenBuffer++ = (TOKEN)w;
break;
case CR_STREQ:
if (*tok != SYMBOL && *tok != STRING)
return error(str_error);
-#if 0
- p = (char *)tok[1];
-#else
p = string[tok[1]];
-#endif
tok +=2;
if (*tok++ != ',')
if (*tok != SYMBOL && *tok != STRING)
return error(str_error);
-#if 0
- p2 = (char *)tok[1];
-#else
p = string[tok[1]];
-#endif
tok += 2;
w = (WORD)(!strcmp(p, p2));
- *tk++ = CONST;
- *tk++ = (TOKEN)w;
+ *evalTokenBuffer++ = CONST;
+ *evalTokenBuffer++ = (TOKEN)w;
break;
}
}
switch ((int)*tok++)
{
case CONST:
- *tk++ = CONST;
- *tk++ = *tok++;
+ *evalTokenBuffer++ = CONST;
+ *evalTokenBuffer++ = *tok++;
break;
case SYMBOL:
-#if 0
- p = (char *)*tok++;
-#else
p = string[*tok++];
-#endif
- j = 0;
-
- if (*p == '.')
- j = curenv;
-
+ j = (*p == '.' ? curenv : 0);
sy = lookup(p, LABEL, j);
if (sy == NULL)
warns("equated symbol \'%s\' cannot be used in register bank 1", sy->sname);
}
- *tk++ = SYMBOL;
+ *evalTokenBuffer++ = SYMBOL;
#if 0
- *tk++ = (TOKEN)sy;
+ *evalTokenBuffer++ = (TOKEN)sy;
#else
- *tk++ = symbolNum;
+ *evalTokenBuffer++ = symbolNum;
symbolPtr[symbolNum] = sy;
symbolNum++;
#endif
break;
case STRING:
- *tk++ = CONST;
-#if 0
- *tk++ = str_value((char *)*tok++);
-#else
- *tk++ = str_value(string[*tok++]);
-#endif
+ *evalTokenBuffer++ = CONST;
+ *evalTokenBuffer++ = str_value(string[*tok++]);
break;
case '(':
if (expr0() != OK)
break;
case '$':
- *tk++ = ACONST; // Attributed const
- *tk++ = sloc; // Current location
- *tk++ = cursect | DEFINED; // Store attribs
+ *evalTokenBuffer++ = ACONST; // Attributed const
+ *evalTokenBuffer++ = sloc; // Current location
+ *evalTokenBuffer++ = cursect | DEFINED; // Store attribs
break;
case '*':
- *tk++ = ACONST; // Attributed const
+ *evalTokenBuffer++ = ACONST; // Attributed const
if (orgactive)
- *tk++ = orgaddr;
+ *evalTokenBuffer++ = orgaddr;
else
- *tk++ = pcloc; // Location at start of line
+ *evalTokenBuffer++ = pcloc; // Location at start of line
- *tk++ = ABS | DEFINED; // Store attribs
+ *evalTokenBuffer++ = ABS | DEFINED; // Store attribs
break;
default:
return error("bad expression");
{
// Passed in values (once derefenced, that is) can all be zero. They are
// there so that the expression analyzer can fill them in as needed. The
- // expression analyzer gets its input from "tok", and not from anything
- // passed in by the user.
- SYM * sy;
+ // expression analyzer gets its input from the global token pointer "tok",
+ // and not from anything passed in by the user.
+ SYM * symbol;
char * p;
int j;
- tk = otk; // Set token pointer to 'exprbuf' (direct.c)
- // Also set in various other places too (riscasm.c, e.g.)
-// symbolNum = 0; // Set symbol number in symbolPtr[] to 0
+ evalTokenBuffer = otk; // Set token pointer to 'exprbuf' (direct.c)
+ // Also set in various other places too (riscasm.c, e.g.)
// Optimize for single constant or single symbol.
if ((tok[1] == EOL)
|| (((*tok == CONST || *tok == SYMBOL) || (*tok >= KW_R0 && *tok <= KW_R31))
- && (tokcl[tok[2]] < UNARY)))
+ && (tokenClass[tok[2]] < UNARY)))
{
if (*tok >= KW_R0 && *tok <= KW_R31)
{
- *tk++ = CONST;
- *tk++ = *a_value = (*tok - KW_R0);
+ *evalTokenBuffer++ = CONST;
+ *evalTokenBuffer++ = *a_value = (*tok - KW_R0);
*a_attr = ABS | DEFINED;
if (a_esym != NULL)
*a_esym = NULL;
tok++;
- *tk++ = ENDEXPR;
+ *evalTokenBuffer++ = ENDEXPR;
return OK;
}
else if (*tok == CONST)
{
- *tk++ = CONST;
- *tk++ = *a_value = tok[1];
+ *evalTokenBuffer++ = CONST;
+ *evalTokenBuffer++ = *a_value = tok[1];
*a_attr = ABS | DEFINED;
if (a_esym != NULL)
}
else if (*tok == '*')
{
- *tk++ = CONST;
+ *evalTokenBuffer++ = CONST;
if (orgactive)
- *tk++ = *a_value = orgaddr;
+ *evalTokenBuffer++ = *a_value = orgaddr;
else
- *tk++ = *a_value = pcloc;
+ *evalTokenBuffer++ = *a_value = pcloc;
*a_attr = ABS | DEFINED;
- //*tk++ =
if (a_esym != NULL)
*a_esym = NULL;
else
{
p = string[tok[1]];
-
-#if 0
- j = 0;
-
- if (*p == '.')
- j = curenv;
-#else
j = (*p == '.' ? curenv : 0);
-#endif
-
- sy = lookup(p, LABEL, j);
+ symbol = lookup(p, LABEL, j);
- if (sy == NULL)
- sy = NewSymbol(p, LABEL, j);
+ if (symbol == NULL)
+ symbol = NewSymbol(p, LABEL, j);
- sy->sattr |= REFERENCED;
+ symbol->sattr |= REFERENCED;
// Check for undefined register equates
- if (sy->sattre & UNDEF_EQUR)
+ if (symbol->sattre & UNDEF_EQUR)
{
- errors("undefined register equate '%s'", sy->sname);
+ errors("undefined register equate '%s'", symbol->sname);
//if we return right away, it returns some spurious errors...
// return ERROR;
}
// Check register bank usage
- if (sy->sattre & EQUATEDREG)
+ if (symbol->sattre & EQUATEDREG)
{
- if ((regbank == BANK_0) && (sy->sattre & BANK_1) && !altbankok)
- warns("equated symbol '%s' cannot be used in register bank 0", sy->sname);
+ if ((regbank == BANK_0) && (symbol->sattre & BANK_1) && !altbankok)
+ warns("equated symbol '%s' cannot be used in register bank 0", symbol->sname);
- if ((regbank == BANK_1) && (sy->sattre & BANK_0) && !altbankok)
- warns("equated symbol '%s' cannot be used in register bank 1", sy->sname);
+ if ((regbank == BANK_1) && (symbol->sattre & BANK_0) && !altbankok)
+ warns("equated symbol '%s' cannot be used in register bank 1", symbol->sname);
}
- *tk++ = SYMBOL;
+ *evalTokenBuffer++ = SYMBOL;
#if 0
- *tk++ = (TOKEN)sy;
+ *evalTokenBuffer++ = (TOKEN)symbol;
#else
- *tk++ = symbolNum;
- symbolPtr[symbolNum] = sy;
+/*
+While this approach works, it's wasteful. It would be better to use something
+that's already available, like the symbol "order defined" table (which needs to
+be converted from a linked list into an array).
+*/
+ *evalTokenBuffer++ = symbolNum;
+ symbolPtr[symbolNum] = symbol;
symbolNum++;
#endif
- if (sy->sattr & DEFINED)
- *a_value = sy->svalue;
+ if (symbol->sattr & DEFINED)
+ *a_value = symbol->svalue;
else
*a_value = 0;
- if (sy->sattre & EQUATEDREG)
+/*
+All that extra crap that was put into the svalue when doing the equr stuff is
+thrown away right here. What the hell is it for?
+*/
+ if (symbol->sattre & EQUATEDREG)
*a_value &= 0x1F;
- *a_attr = (WORD)(sy->sattr & ~GLOBAL);
+ *a_attr = (WORD)(symbol->sattr & ~GLOBAL);
- if ((sy->sattr & (GLOBAL | DEFINED)) == GLOBAL && a_esym != NULL)
- *a_esym = sy;
+ if ((symbol->sattr & (GLOBAL | DEFINED)) == GLOBAL && a_esym != NULL)
+ *a_esym = symbol;
}
tok += 2;
- *tk++ = ENDEXPR;
+ *evalTokenBuffer++ = ENDEXPR;
return OK;
}
if (expr0() != OK)
return ERROR;
- *tk++ = ENDEXPR;
+ *evalTokenBuffer++ = ENDEXPR;
return evexpr(otk, a_value, a_attr, a_esym);
}
if (j == '=' || j == DEQUALS || j == SET || j == REG || j == EQUREG || j == CCDEF)
{
-// equate = (char *)tok[1];
equate = string[tok[1]];
equtyp = j;
tok += 3;
// Do equates
if (equate != NULL)
{
- j = 0; // Pick global or local sym enviroment
+ // Pick global or local symbol enviroment
+#if 0
+ j = 0;
if (*equate == '.')
j = curenv;
-
+#else
+ j = (*equate == '.' ? curenv : 0);
+#endif
sy = lookup(equate, LABEL, j);
if (sy == NULL)
// o everything else
if (equtyp == EQUREG)
{
+//Linko's request to issue a warning on labels that equated to the same register
+//would go here. Not sure how to implement it though. :-/
+/*
+Maybe like this way:
+have an array of bools with 64 entries. Whenever a register is equated, set the
+corresponding register bool to true. Whenever it's undef'ed, set it to false. When
+checking to see if it's already been equated, issue a warning.
+*/
// Check that we are in a RISC section
if (!rgpu && !rdsp)
{
{
sy->sattre = EQUATEDREG | RISCSYM; // Mark as equated register
riscreg = (*tok - KW_R0);
+//is there any reason to do this, since we're putting this in svalue?
sy->sattre |= (riscreg << 8); // Store register number
+ // Default is no register bank specified
+ registerbank = BANK_N;
+
+ // Check for ",<bank #>" notation
if ((tok[1] == ',') && (tok[2] == CONST))
{
+ // Advance token pointer to the constant
tok += 3;
+ // Anything other than a 0 or a 1 will result in "No Bank"
if (*tok == 0)
registerbank = BANK_0;
else if (*tok == 1)
registerbank = BANK_1;
- else
- registerbank = BANK_N;
- }
- else
- {
- registerbank = BANK_N;
}
+// What needs to happen here is to prime registerbank with regbank, then use
+// registerbank down below for the bank marking.
+#warning "!!! regbank <-> registerbank confusion here !!!"
+// The question here is why, if we're allowed to override the ".regbankN" rules above,
+// then why is it using the one set by the directive in the extended attributes and
+// not in what ends up in symbol->svalue?
+// ".regbankN" is not an original Madmac directive, so it's suspect
sy->sattre |= regbank; // Store register bank
eattr = ABS | DEFINED | GLOBAL;
- eval = 0x80000080 + (riscreg) + (registerbank << 8);
+// & what does this $80000080 constant mean???
+// eval = 0x80000080 + (riscreg) + (registerbank << 8);
+ eval = riscreg;
tok++;
}
// Checking for a register symbol
else if (tok[0] == SYMBOL)
{
-// sy2 = lookup((char *)tok[1], LABEL, j);
sy2 = lookup(string[tok[1]], LABEL, j);
// Make sure symbol is a valid equreg
if (tok[0] == SYMBOL)
{
-// sy2 = lookup((char *)tok[1], LABEL, j);
sy2 = lookup(string[tok[1]], LABEL, j);
if (!sy2 || !(sy2->sattre & EQUATEDCC))
//equ a equr
else if (*tok == SYMBOL)
{
-// sy2 = lookup((char *)tok[1], LABEL, j);
sy2 = lookup(string[tok[1]], LABEL, j);
if (sy2 && (sy2->sattre & EQUATEDREG))
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