//
// RMAC - Reboot's Macro Assembler for all Atari computers
// AMODE.C - Addressing Modes
-// 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
//
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
SYM * bf0esym; // External symbol involved in expr
// Function prototypes
-int check030bf(void);
+int Check030Bitfield(void);
//
bf0esym = NULL;
// If at EOL, then no addr modes at all
- if (*tok.u32 == EOL)
+ if (*tok == EOL)
return 0;
// Parse first addressing mode
#define AnREG a0reg
#define AnIXREG a0ixreg
#define AnIXSIZ a0ixsiz
- #define AnEXPR (TOKENPTR)a0expr
+ #define AnEXPR a0expr
#define AnEXVAL a0exval
#define AnEXATTR a0exattr
- #define AnOEXPR (TOKENPTR)a0oexpr
+ #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 (TOKENPTR)a0bexpr
+ #define AnBEXPR a0bexpr
#define AnBEXVAL a0bexval
#define AnBEXATTR a0bexattr
#define AnBZISE a0bsize
// it's a bitfield instruction--check the parameters inside the {} block
// for validity
- if (*tok.u32 == '{')
- if (check030bf() == ERROR)
+ if (*tok == '{')
+ if (Check030Bitfield() == ERROR)
return ERROR;
- if ((acount == 0) || (*tok.u32 != ','))
+ if ((acount == 0) || (*tok != ','))
return 1;
// Eat the comma
- tok.u32++;
+ tok++;
// Parse second addressing mode
#define AnOK a1ok
#define AnREG a1reg
#define AnIXREG a1ixreg
#define AnIXSIZ a1ixsiz
- #define AnEXPR (TOKENPTR)a1expr
+ #define AnEXPR a1expr
#define AnEXVAL a1exval
#define AnEXATTR a1exattr
- #define AnOEXPR (TOKENPTR)a1oexpr
+ #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 (TOKENPTR)a1bexpr
+ #define AnBEXPR a1bexpr
#define AnBEXVAL a1bexval
#define AnBEXATTR a1bexattr
#define AnBZISE a1bsize
// It's a bitfield instruction--check the parameters inside the {} block
// for validity
- if (*tok.u32 == '{')
- if (check030bf() == ERROR)
+ if (*tok == '{')
+ if (Check030Bitfield() == ERROR)
return ERROR;
// At this point, it is legal for 020+ to have a ':'. For example divu.l
// d0,d2:d3
- if (*tok.u32 == ':')
+ if (*tok == ':')
{
if ((activecpu & (CPU_68020 | CPU_68030 | CPU_68040)) == 0)
return error(unsupport);
// TODO: protect this from combinations like Dx:FPx etc :)
- tok.u32++; //eat the colon
+ tok++; //eat the colon
- if ((*tok.u32 >= KW_D0) && (*tok.u32 <= KW_D7))
- {
- a2reg = (*tok.u32 - KW_D0);
- mulmode = 1 << 10;
- }
- else if ((*tok.u32 >= KW_FP0) && (*tok.u32 <= KW_FP7))
- {
- a2reg = (*tok.u32 - KW_FP0);
- mulmode = 1 << 10;
- }
+ if ((*tok >= KW_D0) && (*tok <= KW_D7))
+ a2reg = (*tok++) & 7;
+ else if ((*tok >= KW_FP0) && (*tok <= KW_FP7))
+ a2reg = (*tok++) & 7;
else
return error("a data or FPU register must follow a :");
-
- *tok.u32++;
}
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;
// Error messages:
badmode:
return error("addressing mode syntax");
-
- //unmode:
- //return error("unimplemented addressing mode");
}
for(;;)
{
- if ((*tok.u32 >= KW_D0) && (*tok.u32 <= KW_A7))
- r = *tok.u32++ & 0x0F;
+ if ((*tok >= KW_D0) && (*tok <= KW_A7))
+ r = *tok++ & 0x0F;
else
break;
- if (*tok.u32 == '-')
+ if (*tok == '-')
{
- tok.u32++;
+ tok++;
- if ((*tok.u32 >= KW_D0) && (*tok.u32 <= KW_A7))
- cnt = *tok.u32++ & 0x0F;
+ if ((*tok >= KW_D0) && (*tok <= KW_A7))
+ cnt = *tok++ & 0x0F;
else
return error("register list syntax");
while (cnt-- >= 0)
rmask |= msktab[r++];
- if (*tok.u32 != '/')
+ if (*tok != '/')
break;
- tok.u32++;
+ tok++;
}
*a_rmask = rmask;
for(;;)
{
- if ((*tok.u32 >= KW_FP0) && (*tok.u32 <= KW_FP7))
- r = *tok.u32++ & 0x07;
+ if ((*tok >= KW_FP0) && (*tok <= KW_FP7))
+ r = *tok++ & 0x07;
else
break;
- if (*tok.u32 == '-')
+ if (*tok == '-')
{
- tok.u32++;
+ tok++;
- if ((*tok.u32 >= KW_FP0) && (*tok.u32 <= KW_FP7))
- cnt = *tok.u32++ & 0x07;
+ if ((*tok >= KW_FP0) && (*tok <= KW_FP7))
+ cnt = *tok++ & 0x07;
else
return error("register list syntax");
while (cnt-- >= 0)
rmask |= msktab_minus[r++];
- if (*tok.u32 != '/')
+ if (*tok != '/')
break;
- tok.u32++;
+ tok++;
}
*a_rmask = rmask;
int fpu_reglist_right(WORD * a_rmask)
{
static WORD msktab_plus[] = {
- 0x0001, 0x0002, 0x0004, 0x0008,
- 0x0010, 0x0020, 0x0040, 0x0080
+ 0x0080, 0x0040, 0x0020, 0x0010,
+ 0x0008, 0x0004, 0x0002, 0x0001
};
WORD rmask = 0;
for(;;)
{
- if ((*tok.u32 >= KW_FP0) && (*tok.u32 <= KW_FP7))
- r = *tok.u32++ & 0x07;
+ if ((*tok >= KW_FP0) && (*tok <= KW_FP7))
+ r = *tok++ & 0x07;
else
break;
- if (*tok.u32 == '-')
+ if (*tok == '-')
{
- tok.u32++;
+ tok++;
- if ((*tok.u32 >= KW_FP0) && (*tok.u32 <= KW_FP7))
- cnt = *tok.u32++ & 0x07;
+ if ((*tok >= KW_FP0) && (*tok <= KW_FP7))
+ cnt = *tok++ & 0x07;
else
return error("register list syntax");
while (cnt-- >= 0)
rmask |= msktab_plus[r++];
- if (*tok.u32 != '/')
+ if (*tok != '/')
break;
- tok.u32++;
+ tok++;
}
*a_rmask = rmask;
// bfxxx <ea>{param1,param2}
// param1/2 are either data registers or immediate values
//
-int check030bf(void)
+int Check030Bitfield(void)
{
+ PTR tp;
CHECK00;
- tok.u32++;
+ tok++;
- if (*tok.u32 == CONST)
+ if (*tok == CONST)
{
- tok.u32++;
-// bfval1 = (int)*(uint64_t *)tok.u32;
- bfval1 = (int)*tok.u64;
+ tp.u32 = tok + 1;
+ bfval1 = (int)*tp.u64++;
+ tok = tp.u32;
// Do=0, offset=immediate - shift it to place
bfparam1 = (0 << 11);
-// tok.u32++;
-// tok.u32++;
- tok.u64++;
}
- else if (*tok.u32 == SYMBOL)
+ else if (*tok == SYMBOL)
{
- if (expr((TOKENPTR)bf0expr, &bf0exval, &bf0exattr, &bf0esym) != OK)
+ if (expr(bf0expr, &bf0exval, &bf0exattr, &bf0esym) != OK)
return ERROR;
if (!(bf0exattr & DEFINED))
// Do=0, offset=immediate - shift it to place
bfparam1 = (0 << 11);
}
- else if ((*tok.u32 >= KW_D0) && (*tok.u32 <= KW_D7))
+ else if ((*tok >= KW_D0) && (*tok <= KW_D7))
{
// Do=1, offset=data register - shift it to place
bfparam1 = (1 << 11);
- bfval1 = (*(int *)tok.u32 - 128);
- tok.u32++;
+ bfval1 = (*(int *)tok - 128);
+ tok++;
}
else
return ERROR;
// Eat the ':', if any
- if (*tok.u32 == ':')
- tok.u32++;
+ if (*tok == ':')
+ tok++;
- if (*tok.u32 == '}' && tok.u32[1] == EOL)
+ if (*tok == '}' && tok[1] == EOL)
{
// It is ok to have }, EOL here - it might be "fmove fpn,<ea> {dx}"
- tok.u32++;
+ tok++;
return OK;
}
- if (*tok.u32 == CONST)
+ if (*tok == CONST)
{
- tok.u32++;
-// bfval2 = (int)*(uint64_t *)tok.u32;
- bfval2 = (int)*tok.u64;
+ tp.u32 = tok + 1;
+ bfval2 = (int)*tp.u64++;
+ tok = tp.u32;
// Do=0, offset=immediate - shift it to place
bfparam2 = (0 << 5);
-// tok.u32++;
-// tok.u32++;
- tok.u64++;
}
- else if (*tok.u32 == SYMBOL)
+ else if (*tok == SYMBOL)
{
- if (expr((TOKENPTR)bf0expr, &bf0exval, &bf0exattr, &bf0esym) != OK)
+ if (expr(bf0expr, &bf0exval, &bf0exattr, &bf0esym) != OK)
return ERROR;
bfval2 = (int)bf0exval;
// Do=0, offset=immediate - shift it to place
bfparam2 = (0 << 5);
}
- else if ((*tok.u32 >= KW_D0) && (*tok.u32 <= KW_D7))
+ else if ((*tok >= KW_D0) && (*tok <= KW_D7))
{
// Do=1, offset=data register - shift it to place
- bfval2 = ((*(int *)tok.u32 - 128));
+ bfval2 = (*(int *)tok - 128);
bfparam2 = (1 << 5);
- tok.u32++;
+ tok++;
}
else
return ERROR;
- tok.u32++; // Eat the '}'
+ tok++; // Eat the '}'
return OK;
}
projects / rmac / blobdiff