//
// RMAC - Reboot's Macro Assembler for the Atari Jaguar Console System
// PROCLN.C - Line Processing
-// 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
+// Source utilised with the kind permission of Landon Dyer
//
#include "procln.h"
#include "symbol.h"
#include "riscasm.h"
-#define DEF_KW // Declare keyword values
+#define DEF_KW // Declare keyword values
#include "kwtab.h" // Incl generated keyword tables & defs
#define DEF_MN // Incl 68k keyword definitions
static IFENT ifent0; // Root ifent
static IFENT * f_ifent; // Freelist of ifents
static int disabled; // Assembly conditionally disabled
-int just_bss; // 1, ds.b in microprocessor mode
-VALUE pcloc; // Value of "PC" at beginning of line
-IFENT * ifent; // Current ifent
+int just_bss; // 1, ds.b in microprocessor mode
+VALUE pcloc; // Value of "PC" at beginning of line
SYM * lab_sym; // Label on line (or NULL)
const char extra_stuff[] = "extra (unexpected) text found after addressing mode";
0L, // 076
0L, // 077
M_ABASE, // 0100
- M_MEMPOST, // 0101
- M_MEMPRE, // 0102
+ M_MEMPOST, // 0101
+ M_MEMPRE, // 0102
M_PCBASE, // 0103
M_PCMPOST, // 0104
M_PCMPRE, // 0105
M_AM_USP, // 0106
- M_AM_SR, // 0107
+ M_AM_SR, // 0107
M_AM_CCR, // 0110
- M_AM_NONE // 0111
+ M_AM_NONE // 0111
}; // 0112 length
//
-// 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
// Get another line of tokens
if (TokenizeLine() == TKEOF)
{
-if (verb_flag) printf("Assemble: Found TKEOF flag...\n");
+if (debug) printf("Assemble: Found TKEOF flag...\n");
if (list_flag && listflag) // Flush last line of source
listeol();
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;
-
- // Looks like another label follows the previous one, so handle
- // the previous one
- if (*tok == SYMBOL && tok[2] == ':')
- {
-// as68mode = 1;
-// goto do_label;
- if (HandleLabel(label, labtyp) != 0)
- goto loop;
+ if (HandleLabel(label, labtyp) != 0)
+ goto loop;
- goto as68label;
- }
+ 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:
// Check for ".b" ".w" ".l" after directive, macro or mnemonic.
siz = SIZN;
- if (*tok == DOTW)
+ if (*tok == DOTW)
siz = SIZW, tok++;
else if (*tok == DOTL)
siz = SIZL, tok++;
switch (state)
{
case MN_IF:
- d_if ();
+ d_if();
goto loop;
case MN_ELSE:
d_else();
goto loop;
case MN_ENDIF:
- d_endif ();
+ d_endif();
goto loop;
case MN_IIF: // .iif --- immediate if
if (disabled || expr(exprbuf, &eval, &eattr, &esym) != OK)
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_ENDM: // .endm --- same as .exitm
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 0
- if (label != NULL)
- warn(lab_ignored);
-#else
// Handle labels on REPT directive lines...
if (label)
{
if (HandleLabel(label, labtyp) != 0)
goto loop;
}
-#endif
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)
{
if ((equtyp == EQUREG) && (sy->sattre & UNDEF_EQUR))
{
-//REALLY? sy->sattre |= ~UNDEF_EQUR;
- sy->sattre &= ~UNDEF_EQUR;
- sy->svalue = 0;
+//REALLY? sy->sattre |= ~UNDEF_EQUR;
+ sy->sattre &= ~UNDEF_EQUR;
+ 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
// 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. :-/
+//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.
+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)
// 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:
-#if 0
- // 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);
- 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;
- }
-#else
// Non-zero == error occurred
if (HandleLabel(label, labtyp) != 0)
goto loop;
-#endif
- // 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
// Invoke macro or complain about bad mnemonic
if (state < 0)
{
- if ((sy = lookup(opname, MACRO, 0)) != NULL)
+ if ((sy = lookup(opname, MACRO, 0)) != NULL)
InvokeMacro(sy, siz);
else
errors("unknown op '%s'", opname);
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)
goto loop;
}
+ // Keep a backup of chptr (used for optimisations during codegen)
+ chptr_opcode = chptr;
+
for(;;)
{
if ((m->mnattr & siz) && (amsk0 & m->mn0) != 0 && (amsk1 & m->mn1) != 0)
int HandleLabel(char * label, int labelType)
{
// Check for dot in front of label; means this is a local label if present
- int j = (*label == '.' ? curenv : 0);
- SYM * sy = lookup(label, LABEL, j);
+ int environment = (*label == '.' ? curenv : 0);
+ SYM * symbol = lookup(label, LABEL, environment);
- if (sy == NULL)
+ if (symbol == NULL)
{
- sy = NewSymbol(label, LABEL, j);
- sy->sattr = 0;
- sy->sattre = RISCSYM;
+ symbol = NewSymbol(label, LABEL, environment);
+ symbol->sattr = 0;
+// symbol->sattre = RISCSYM;
+ symbol->sattre = 0;
}
- else if (sy->sattr & DEFINED)
+ else if (symbol->sattr & DEFINED)
return errors("multiply-defined label '%s'", label);
- // 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 in it
+ AddToSymbolDeclarationList(symbol);
if (orgactive)
{
- sy->svalue = orgaddr;
- sy->sattr |= ABS | DEFINED | EQUATED;
+ symbol->svalue = orgaddr;
+ symbol->sattr |= ABS | DEFINED | EQUATED;
}
else
{
- sy->svalue = sloc;
- sy->sattr |= DEFINED | cursect;
+ symbol->svalue = sloc;
+ symbol->sattr |= DEFINED | cursect;
}
- lab_sym = sy;
+ lab_sym = symbol;
- if (!j)
+ if (0 == environment)
curenv++;
// Make label global if it has a double colon
if (labelType == DCOLON)
{
- if (j)
+ if (environment != 0)
return error(locgl_error);
- sy->sattr |= GLOBAL;
+ 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;
}
+
projects / rmac / blobdiff