// PROCLN.C - Line Processing
// Copyright (C) 199x Landon Dyer, 2011 Reboot and Friends
// RMAC derived from MADMAC v1.07 Written by Landon Dyer, 1986
-// Source Utilised with the Kind Permission of Landon Dyer
+// Source utilised with the kind permission of Landon Dyer
//
#include "procln.h"
}; // 0112 length
+// Function prototypes
+int HandleLabel(char *, int);
+
+
//
-// Initialize Line Processor
+// Initialize line processor
//
void InitLineProcessor(void)
{
//
-// Line Processor
+// Line processor
//
void Assemble(void)
{
SYM * sy, * sy2; // Symbol (temp usage)
char * opname = NULL; // Name of dirctve/mnemonic/macro
int listflag; // 0: Don't call listeol()
- int as68mode = 0; // 1: Handle multiple labels
WORD rmask; // Register list, for REG
int registerbank; // RISC register bank
int riscreg; // RISC register
if (*tok == EOL) // Restart loop if end-of-line
goto loop;
- // First token MUST be a symbol
+ // First token MUST be a symbol (Shamus: not sure why :-/)
if (*tok != SYMBOL)
{
-// error(syntax_error);
error("syntax error; expected symbol");
goto loop;
}
if (j == ':' || j == DCOLON)
{
as68label:
-// label = (char *)tok[1]; // Get label name
label = string[tok[1]]; // Get label name
labtyp = tok[2]; // Get label type
tok += 3; // Go to next line token
- // Handle multiple labels; if there's another label, go process it,
- // and come back at `as68label' above.
- if (as68_flag)
+ // AS68 MODE:
+ // Looks like another label follows the previous one, so handle
+ // the previous one until there aren't any more
+ if (as68_flag && (*tok == SYMBOL && tok[2] == ':'))
{
- as68mode = 0;
+ if (HandleLabel(label, labtyp) != 0)
+ goto loop;
- if (*tok == SYMBOL && tok[2] == ':')
- {
- as68mode = 1;
- goto do_label;
- }
+ goto as68label;
}
}
// Next token MUST be a symbol
if (*tok++ != SYMBOL)
{
-// error(syntax_error);
error("syntax error; expected symbol");
goto loop;
}
-// This is the problem here: On 64-bit platforms, this cuts the native pointer
-// in half. We need to figure out how to fix this.
-//#warning "!!! Bad pointer !!!"
-#if 0
- opname = p = (char *)*tok++; // Store opcode name here
-#else
opname = p = string[*tok++];
-#endif
// Check to see if the SYMBOL is a keyword (a mnemonic or directive).
// On output, `state' will have one of the values:
case MN_MACRO: // .macro --- macro definition
if (!disabled)
{
+ // Label on a macro definition is bad mojo... Warn the user
if (label != NULL)
warn(lab_ignored);
case MN_REPT:
if (!disabled)
{
- if (label != NULL)
- warn(lab_ignored);
+ // Handle labels on REPT directive lines...
+ if (label)
+ {
+ if (HandleLabel(label, labtyp) != 0)
+ goto loop;
+ }
defrept();
}
if (equate != NULL)
{
// 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)
{
//REALLY? sy->sattre |= ~UNDEF_EQUR;
sy->sattre &= ~UNDEF_EQUR;
- sy->svalue = 0;
+ sy->svalue = 0;
}
else if ((equtyp == CCDEF) && (sy->sattre & UNDEF_CC))
{
}
}
- // Put symbol in "order of definition" list
- if (!(sy->sattr & SDECLLIST))
- sym_decl(sy);
+ // Put symbol in "order of definition" list if it's not already there
+ AddToSymbolDeclarationList(sy);
// Parse value to equate symbol to;
// o .equr
// Check for register to equate to
if ((*tok >= KW_R0) && (*tok <= KW_R31))
{
- sy->sattre = EQUATEDREG | RISCSYM; // Mark as equated register
+// sy->sattre = EQUATEDREG | RISCSYM; // Mark as equated register
+ sy->sattre = EQUATEDREG; // Mark as equated register
riscreg = (*tok - KW_R0);
//is there any reason to do this, since we're putting this in svalue?
//i'm thinking, no. Let's test that out! :-D
// 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?
+// 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
#endif
goto loop;
}
- sy->sattr |= eattr | EQUATED; // Symbol inherits value and attributes
+ sy->sattr |= eattr | EQUATED; // Symbol inherits value and attributes
sy->svalue = eval;
- if (list_flag) // Put value in listing
+ if (list_flag) // Put value in listing
listvalue(eval);
- at_eol(); // Must be at EOL now
+ at_eol(); // Must be at EOL now
goto loop;
}
// Do labels
if (label != NULL)
{
-do_label:
- // Check for dot in front of label; means this is a local label if present
- j = (*label == '.' ? curenv : 0);
- sy = lookup(label, LABEL, j);
-
- if (sy == NULL)
- {
- sy = NewSymbol(label, LABEL, j);
- sy->sattr = 0;
- sy->sattre = RISCSYM;
- }
- else if (sy->sattr & DEFINED)
- {
- errors("multiply-defined label '%s'", label);
+ // Non-zero == error occurred
+ if (HandleLabel(label, labtyp) != 0)
goto loop;
- }
-
- // Put symbol in "order of definition" list
- if (!(sy->sattr & SDECLLIST))
- sym_decl(sy);
-
- if (orgactive)
- {
- sy->svalue = orgaddr;
- sy->sattr |= ABS | DEFINED | EQUATED;
- }
- else
- {
- sy->svalue = sloc;
- sy->sattr |= DEFINED | cursect;
- }
-
- lab_sym = sy;
-
- if (!j)
- curenv++;
-
- // Make label global
- if (labtyp == DCOLON)
- {
- if (j)
- {
- error(locgl_error);
- goto loop;
- }
-
- sy->sattr |= GLOBAL;
- }
-
- // If we're in as68 mode, and there's another label, go back and handle it
- if (as68_flag && as68mode)
- goto as68label;
}
// Punt on EOL
goto loop;
}
- if (sloc & 1) // Automatic .even
+ if (sloc & 1) // Automatic .even
auto_even();
- if (challoc - ch_size < 18) // Make sure have space in current chunk
+ if (challoc - ch_size < 18) // Make sure have space in current chunk
chcheck(0);
m = &machtab[state - 1000];
goto loop;
}
- if (amode(1) < 0) // Parse 0, 1 or 2 addr modes
+ if (amode(1) < 0) // Parse 0, 1 or 2 addr modes
goto loop;
if (*tok != EOL)
}
+//
+// Handle the creation of labels
+//
+int HandleLabel(char * label, int labelType)
+{
+ // Check for dot in front of label; means this is a local label if present
+ int environment = (*label == '.' ? curenv : 0);
+ SYM * symbol = lookup(label, LABEL, environment);
+
+ if (symbol == NULL)
+ {
+ symbol = NewSymbol(label, LABEL, environment);
+ symbol->sattr = 0;
+// symbol->sattre = RISCSYM;
+ symbol->sattre = 0;
+ }
+ else if (symbol->sattr & DEFINED)
+ return errors("multiply-defined label '%s'", label);
+
+ // Put symbol in "order of definition" list if it's not already in it
+ AddToSymbolDeclarationList(symbol);
+
+ if (orgactive)
+ {
+ symbol->svalue = orgaddr;
+ symbol->sattr |= ABS | DEFINED | EQUATED;
+ }
+ else
+ {
+ symbol->svalue = sloc;
+ symbol->sattr |= DEFINED | cursect;
+ }
+
+ lab_sym = symbol;
+
+ if (0 == environment)
+ curenv++;
+
+ // Make label global if it has a double colon
+ if (labelType == DCOLON)
+ {
+ if (environment != 0)
+ return error(locgl_error);
+
+ symbol->sattr |= GLOBAL;
+ }
+
+ return 0;
+}
+
+
//
-// .if, Start Conditional Assembly
+// .if, Start conditional assembly
//
int d_if(void)
{
//
-// .else, Do Alternate Case For .if
+// .else, Do alternate case for .if
//
int d_else(void)
{
f_ifent = rif;
return 0;
}
+
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