-////////////////////////////////////////////////////////////////////////////////////////////////////
-// RMAC - Reboot's Macro Assembler for the Atari Jaguar Console System
+//
+// RMAC - Reboot's Macro Assembler for all Atari computers
// AMODE.C - Addressing Modes
-// Copyright (C) 199x Landon Dyer, 2011 Reboot and Friends
+// Copyright (C) 199x Landon Dyer, 2011-2017 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 "amode.h"
#include "error.h"
-#include "token.h"
#include "expr.h"
+#include "mach.h"
+#include "procln.h"
#include "rmac.h"
+#include "sect.h"
+#include "token.h"
#define DEF_KW
#include "kwtab.h"
#define DEF_MN
#include "mntab.h"
+extern char unsupport[];
+
// Address-mode information
-int nmodes; // Number of addr'ing modes found
-int am0; // Addressing mode
-int a0reg; // Register
-TOKEN a0expr[EXPRSIZE]; // Expression
-VALUE a0exval; // Expression's value
-WORD a0exattr; // Expression's attribute
-int a0ixreg; // Index register
-int a0ixsiz; // Index register size (and scale)
-TOKEN a0oexpr[EXPRSIZE]; // Outer displacement expression
-VALUE a0oexval; // Outer displacement value
-WORD a0oexattr; // Outer displacement attribute
-SYM *a0esym; // External symbol involved in expr
-
-int am1; // Addressing mode
-int a1reg; // Register
-TOKEN a1expr[EXPRSIZE]; // Expression
-VALUE a1exval; // Expression's value
-WORD a1exattr; // Expression's attribute
-int a1ixreg; // Index register
-int a1ixsiz; // Index register size (and scale)
-TOKEN a1oexpr[EXPRSIZE]; // Outer displacement expression
-VALUE a1oexval; // Outer displacement value
-WORD a1oexattr; // Outer displacement attribute
-SYM *a1esym; // External symbol involved in expr
+int nmodes; // Number of addr'ing modes found
+int am0; // Addressing mode
+int a0reg; // Register
+TOKEN a0expr[EXPRSIZE]; // Expression
+VALUE a0exval; // Expression's value
+WORD a0exattr; // Expression's attribute
+int a0ixreg; // Index register
+int a0ixsiz; // Index register size (and scale)
+TOKEN a0oexpr[EXPRSIZE]; // Outer displacement expression
+VALUE a0oexval; // Outer displacement value
+WORD a0oexattr; // Outer displacement attribute
+SYM * a0esym; // External symbol involved in expr
+TOKEN a0bexpr[EXPRSIZE]; // Base displacement expression
+VALUE a0bexval; // Base displacement value
+WORD a0bexattr; // Base displacement attribute
+WORD a0bsize; // Base displacement size
+WORD a0extension; // 020+ extension address word
+WORD am0_030; // ea bits for 020+ addressing modes
+
+int am1; // Addressing mode
+int a1reg; // Register
+TOKEN a1expr[EXPRSIZE]; // Expression
+VALUE a1exval; // Expression's value
+WORD a1exattr; // Expression's attribute
+int a1ixreg; // Index register
+int a1ixsiz; // Index register size (and scale)
+TOKEN a1oexpr[EXPRSIZE]; // Outer displacement expression
+VALUE a1oexval; // Outer displacement value
+WORD a1oexattr; // Outer displacement attribute
+SYM * a1esym; // External symbol involved in expr
+TOKEN a1bexpr[EXPRSIZE]; // Base displacement expression
+VALUE a1bexval; // Base displacement value
+WORD a1bexattr; // Base displacement attribute
+WORD a1bsize; // Base displacement size
+WORD a1extension; // 020+ extension address word
+WORD am1_030; // ea bits for 020+ addressing modes
+
+int a2reg; // Register for div.l (68020+)
+WORD mulmode; // to distinguish between 32 and 64 bit multiplications (68020+)
+
+int bfparam1; // bfxxx / fmove instruction parameter 1
+int bfparam2; // bfxxx / fmove instruction parameter 2
+int bfval1; //bfxxx / fmove value 1
+int bfval2; //bfxxx / fmove value 2
+TOKEN bf0expr[EXPRSIZE]; // Expression
+VALUE bf0exval; // Expression's value
+WORD bf0exattr; // Expression's attribute
+SYM * bf0esym; // External symbol involved in expr
+
+// Function prototypes
+int check030bf(void);
+
//
-// --- Parse Addressing Mode -----------------------------------------------------------------------
+// Parse addressing mode
//
-
-int amode(int acount) {
- // Initialize global return values
+int amode(int acount)
+{
+ // Initialize global return values
nmodes = a0reg = a1reg = 0;
am0 = am1 = AM_NONE;
a0expr[0] = a0oexpr[0] = a1expr[0] = a1oexpr[0] = ENDEXPR;
a0exattr = a0oexattr = a1exattr = a1oexattr = 0;
- a0esym = a1esym = (SYM *)NULL;
-
- // If at EOL, then no addr modes at all
- if(*tok == EOL)
- return(0);
-
- // Parse first addressing mode
- #define AnOK a0ok
- #define AMn am0
- #define AnREG a0reg
- #define AnIXREG a0ixreg
- #define AnIXSIZ a0ixsiz
- #define AnEXPR a0expr
- #define AnEXVAL a0exval
- #define AnEXATTR a0exattr
- #define AnOEXPR a0oexpr
- #define AnOEXVAL a0oexval
- #define AnOEXATTR a0oexattr
- #define AnESYM a0esym
- #define AMn_IX0 am0_ix0
- #define AMn_IXN am0_ixn
- #include "parmode.h"
-
- // If caller wants only one mode, return just one (ignore comma);
- // If there is no second addressing mode (no comma), then return just one anyway.
- nmodes = 1;
- if(acount == 0 || *tok != ',')
- return(1);
- ++tok; // Eat comma
-
- // Parse second addressing mode
- #define AnOK a1ok
- #define AMn am1
- #define AnREG a1reg
- #define AnIXREG a1ixreg
- #define AnIXSIZ a1ixsiz
- #define AnEXPR a1expr
- #define AnEXVAL a1exval
- #define AnEXATTR a1exattr
- #define AnOEXPR a1oexpr
- #define AnOEXVAL a1oexval
- #define AnOEXATTR a1oexattr
- #define AnESYM a1esym
- #define AMn_IX0 am1_ix0
- #define AMn_IXN am1_ixn
- #include "parmode.h"
-
- nmodes = 2;
- return(2);
-
- // Error messages:
- badmode:
-
- return(error("addressing mode syntax"));
-
- unmode:
-
- return(error("unimplemented addressing mode"));
+ a0esym = a1esym = NULL;
+ a0bexpr[0] = a1bexpr[0] = ENDEXPR;
+ a0bexval = a0bsize = a0extension = a1bexval = a1bsize = a1extension = 0;
+ am0_030 = am1_030 = 0;
+ bfparam1 = bfparam2 = 0;
+ bf0expr[0] = ENDEXPR;
+ bf0exattr = 0;
+ bf0esym = NULL;
+
+ // If at EOL, then no addr modes at all
+ if (*tok == EOL)
+ return 0;
+
+ // Parse first addressing mode
+ #define AnOK a0ok
+ #define AMn am0
+ #define AnREG a0reg
+ #define AnIXREG a0ixreg
+ #define AnIXSIZ a0ixsiz
+ #define AnEXPR a0expr
+ #define AnEXVAL a0exval
+ #define AnEXATTR a0exattr
+ #define AnOEXPR a0oexpr
+ #define AnOEXVAL a0oexval
+ #define AnOEXATTR a0oexattr
+ #define AnESYM a0esym
+ #define AMn_IX0 am0_ix0
+ #define AMn_IXN am0_ixn
+ #define CHK_FOR_DISPn CheckForDisp0
+ #define AnBEXPR a0bexpr
+ #define AnBEXVAL a0bexval
+ #define AnBEXATTR a0bexattr
+ #define AnBZISE a0bsize
+ #define AnEXTEN a0extension
+ #define AMn_030 am0_030
+ #define IS_SUPPRESSEDn IS_SUPPRESSED0
+ #define CHECKODn CHECKOD0
+ #include "parmode.h"
+
+ // If caller wants only one mode, return just one (ignore comma);. If there
+ // is no second addressing mode (no comma), then return just one anyway.
+ nmodes = 1;
+
+ // it's a bitfield instruction--check the parameters inside the {} block
+ // for validity
+ if (*tok == '{')
+ if (check030bf() == ERROR)
+ return ERROR;
+
+ if ((acount == 0) || (*tok != ','))
+ return 1;
+
+ // Eat the comma
+ tok++;
+
+ // Parse second addressing mode
+ #define AnOK a1ok
+ #define AMn am1
+ #define AnREG a1reg
+ #define AnIXREG a1ixreg
+ #define AnIXSIZ a1ixsiz
+ #define AnEXPR a1expr
+ #define AnEXVAL a1exval
+ #define AnEXATTR a1exattr
+ #define AnOEXPR a1oexpr
+ #define AnOEXVAL a1oexval
+ #define AnOEXATTR a1oexattr
+ #define AnESYM a1esym
+ #define AMn_IX0 am1_ix0
+ #define AMn_IXN am1_ixn
+ #define CHK_FOR_DISPn CheckForDisp1
+ #define AnBEXPR a1bexpr
+ #define AnBEXVAL a1bexval
+ #define AnBEXATTR a1bexattr
+ #define AnBZISE a1bsize
+ #define AnEXTEN a1extension
+ #define AMn_030 am1_030
+ #define IS_SUPPRESSEDn IS_SUPPRESSED1
+ #define CHECKODn CHECKOD1
+ #include "parmode.h"
+
+ // It's a bitfield instruction--check the parameters inside the {} block
+ // for validity
+ if (*tok == '{')
+ if (check030bf() == ERROR)
+ return ERROR;
+
+ // At this point, it is legal for 020+ to have a ':'. For example divu.l
+ // d0,d2:d3
+ if (*tok == ':')
+ {
+ if ((activecpu & (CPU_68020 | CPU_68030 | CPU_68040)) == 0)
+ return error(unsupport);
+
+ // TODO: protect this from combinations like Dx:FPx etc :)
+ tok++; //eat the colon
+
+ if ((*tok >= KW_D0) && (*tok <= KW_D7))
+ {
+ a2reg = (*tok - KW_D0);
+ mulmode = 1 << 10;
+ }
+ else if ((*tok >= KW_FP0) && (*tok <= KW_FP7))
+ {
+ a2reg = (*tok - KW_FP0);
+ mulmode = 1 << 10;
+ }
+ else
+ return error("a data or FPU register must follow a :");
+
+ *tok++;
+ }
+ else
+ {
+ // If no ':' is present then maybe we have something like divs.l d0,d1
+ // which sould translate to divs.l d0,d1:d1
+ a2reg = a1reg;
+ mulmode = 0;
+ }
+
+ nmodes = 2;
+ return 2;
+
+ // Error messages:
+badmode:
+ return error("addressing mode syntax");
+
+ //unmode:
+ //return error("unimplemented addressing mode");
}
+
+//
+// Parse register list
+//
+int reglist(WORD * a_rmask)
+{
+ static WORD msktab[] = {
+ 0x0001, 0x0002, 0x0004, 0x0008,
+ 0x0010, 0x0020, 0x0040, 0x0080,
+ 0x0100, 0x0200, 0x0400, 0x0800,
+ 0x1000, 0x2000, 0x4000, 0x8000
+ };
+
+ WORD rmask = 0;
+ int r, cnt;
+
+ for(;;)
+ {
+ if ((*tok >= KW_D0) && (*tok <= KW_A7))
+ r = *tok++ & 0x0F;
+ else
+ break;
+
+ if (*tok == '-')
+ {
+ tok++;
+
+ if ((*tok >= KW_D0) && (*tok <= KW_A7))
+ cnt = *tok++ & 0x0F;
+ else
+ return error("register list syntax");
+
+ if (cnt < r)
+ return error("register list order");
+
+ cnt -= r;
+ }
+ else
+ cnt = 0;
+
+ while (cnt-- >= 0)
+ rmask |= msktab[r++];
+
+ if (*tok != '/')
+ break;
+
+ tok++;
+ }
+
+ *a_rmask = rmask;
+
+ return OK;
+}
+
+
//
-// --- Parse Register List -------------------------------------------------------------------------
+// Parse FPU register list
//
+int fpu_reglist_left(WORD * a_rmask)
+{
+ static WORD msktab_minus[] = {
+ 0x0080, 0x0040, 0x0020, 0x0010,
+ 0x0008, 0x0004, 0x0002, 0x0001
+ };
-int reglist(WORD *a_rmask) {
- static WORD msktab[] = {
- 0x0001, 0x0002, 0x0004, 0x0008,
- 0x0010, 0x0020, 0x0040, 0x0080,
- 0x0100, 0x0200, 0x0400, 0x0800,
- 0x1000, 0x2000, 0x4000, 0x8000
- };
- WORD rmask;
- int r, cnt;
-
- rmask = 0;
- for(;;) {
- if(*tok >= KW_D0 && *tok <= KW_A7)
- r = *tok++ & 15;
- else break;
-
- if(*tok == '-') {
- ++tok;
- if(*tok >= KW_D0 && *tok <= KW_A7)
- cnt = *tok++ & 15;
- else
- return(error("register list syntax"));
-
- if(cnt < r)
- return(error("register list order"));
- cnt -= r;
- } else
- cnt = 0;
-
- while(cnt-- >= 0)
- rmask |= msktab[r++];
- if(*tok != '/')
- break;
- ++tok;
- }
-
- *a_rmask = rmask;
-
- return(OK);
+ WORD rmask = 0;
+ int r, cnt;
+
+ for(;;)
+ {
+ if ((*tok >= KW_FP0) && (*tok <= KW_FP7))
+ r = *tok++ & 0x07;
+ else
+ break;
+
+ if (*tok == '-')
+ {
+ tok++;
+
+ if ((*tok >= KW_FP0) && (*tok <= KW_FP7))
+ cnt = *tok++ & 0x07;
+ else
+ return error("register list syntax");
+
+ if (cnt < r)
+ return error("register list order");
+
+ cnt -= r;
+ }
+ else
+ cnt = 0;
+
+ r = 0;
+
+ while (cnt-- >= 0)
+ rmask |= msktab_minus[r++];
+
+ if (*tok != '/')
+ break;
+
+ tok++;
+ }
+
+ *a_rmask = rmask;
+
+ return OK;
}
+int fpu_reglist_right(WORD * a_rmask)
+{
+ static WORD msktab_plus[] = {
+ 0x0001, 0x0002, 0x0004, 0x0008,
+ 0x0010, 0x0020, 0x0040, 0x0080
+ };
+
+ WORD rmask = 0;
+ int r, cnt;
+
+ for(;;)
+ {
+ if ((*tok >= KW_FP0) && (*tok <= KW_FP7))
+ r = *tok++ & 0x07;
+ else
+ break;
+
+ if (*tok == '-')
+ {
+ tok++;
+
+ if ((*tok >= KW_FP0) && (*tok <= KW_FP7))
+ cnt = *tok++ & 0x07;
+ else
+ return error("register list syntax");
+
+ if (cnt < r)
+ return error("register list order");
+
+ cnt -= r;
+ }
+ else
+ cnt = 0;
+
+ while (cnt-- >= 0)
+ rmask |= msktab_plus[r++];
+
+ if (*tok != '/')
+ break;
+
+ tok++;
+ }
+
+ *a_rmask = rmask;
+
+ return OK;
+}
+
+
+//
+// Check for bitfield instructions extra params
+// These are 020+ instructions and have the following syntax:
+// bfxxx <ea>{param1,param2}
+// param1/2 are either data registers or immediate values
+//
+int check030bf(void)
+{
+ CHECK00;
+ tok++;
+
+ if (*tok == CONST)
+ {
+ tok++;
+ bfval1 = *(int *)tok;
+
+ // Do=0, offset=immediate - shift it to place
+ bfparam1 = (0 << 11);
+ tok++;
+ }
+ else if (*tok == SYMBOL)
+ {
+ if (expr(bf0expr, &bf0exval, &bf0exattr, &bf0esym) != OK)
+ return ERROR;
+
+ if (!(bf0exattr & DEFINED))
+ return error("bfxxx offset: immediate value must evaluate");
+
+ bfval1 = bf0exval;
+
+ // Do=0, offset=immediate - shift it to place
+ bfparam1 = (0 << 11);
+ }
+ else if ((*tok >= KW_D0) && (*tok <= KW_D7))
+ {
+ // Do=1, offset=data register - shift it to place
+ bfparam1 = (1 << 11);
+ bfval1 = (*(int *)tok - 128);
+ tok++;
+ }
+ else
+ return ERROR;
+
+ if (*tok==':')
+ tok++; //eat the ':'
+
+ if (*tok == '}' && tok[1] == EOL)
+ {
+ // It is ok to have }, EOL here - it might be "fmove fpn,<ea> {dx}"
+ tok++;
+ return OK;
+ }
+
+ if (*tok == CONST)
+ {
+ tok++;
+ bfval2 = *(int *)tok;
+
+ // Do=0, offset=immediate - shift it to place
+ bfparam2 = (0 << 5);
+ tok++;
+ }
+ else if (*tok == SYMBOL)
+ {
+ if (expr(bf0expr, &bf0exval, &bf0exattr, &bf0esym) != OK)
+ return ERROR;
+
+ bfval2 = bf0exval;
+
+ if (!(bf0exattr & DEFINED))
+ return error("bfxxx width: immediate value must evaluate");
+
+ // Do=0, offset=immediate - shift it to place
+ bfparam2 = (0 << 5);
+ }
+ else if ((*tok >= KW_D0) && (*tok <= KW_D7))
+ {
+ // Do=1, offset=data register - shift it to place
+ bfval2 = ((*(int *)tok - 128));
+ bfparam2 = (1 << 5);
+ tok++;
+ }
+ else
+ return ERROR;
+
+ tok++; // Eat the '}'
+
+ return OK;
+}
+
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