//
// RMAC - Reboot's Macro Assembler for the Atari Jaguar Console System
// AMODE.C - DSP 56001 Addressing Modes
-// Copyright (C) 199x Landon Dyer, 2011-2019 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
//
#define P_ERRORS 3
const char *ea_errors[][12] = {
- // X:
- {
- "unrecognised X: parallel move syntax: expected '(' after 'X:-'", // 0
- "unrecognised X: parallel move syntax: expected ')' after 'X:-(Rn'", // 1
- "unrecognised X: parallel move syntax: expected R0-R7 after 'X:-('", // 2
- "unrecognised X: parallel move syntax: expected N0-N7 after 'X:(Rn+'", // 3
- "unrecognised X: parallel move syntax: expected same register number in Rn and Nn for 'X:(Rn+Nn)'", // 4
- "unrecognised X: parallel move syntax: expected ')' after 'X:(Rn+Nn'", // 5
- "unrecognised X: parallel move syntax: expected same register number in Rn and Nn for 'X:(Rn)+Nn'", // 6
- "unrecognised X: parallel move syntax: expected N0-N7 after 'X:(Rn)+'", // 7
- "unrecognised X: parallel move syntax: expected same register number in Rn and Nn for 'X:(Rn)-Nn'", // 8
- "unrecognised X: parallel move syntax: expected N0-N7 after 'X:(Rn)-'", // 9
- "unrecognised X: parallel move syntax: expected '+', '-' or ',' after 'X:(Rn)'", // 10
- "unrecognised X: parallel move syntax: expected '+' or ')' after 'X:(Rn'", // 11
- },
- // Y:
- {
- "unrecognised Y: parallel move syntax: expected '(' after 'Y:-'", // 0
- "unrecognised Y: parallel move syntax: expected ')' after 'Y:-(Rn'", // 1
- "unrecognised Y: parallel move syntax: expected R0-R7 after 'Y:-('", // 2
- "unrecognised Y: parallel move syntax: expected N0-N7 after 'Y:(Rn+'", // 3
- "unrecognised Y: parallel move syntax: expected same register number in Rn and Nn for 'Y:(Rn+Nn)'", // 4
- "unrecognised Y: parallel move syntax: expected ')' after 'Y:(Rn+Nn'", // 5
- "unrecognised Y: parallel move syntax: expected same register number in Rn and Nn for 'Y:(Rn)+Nn'", // 6
- "unrecognised Y: parallel move syntax: expected N0-N7 after 'Y:(Rn)+'", // 7
- "unrecognised Y: parallel move syntax: expected same register number in Rn and Nn for 'Y:(Rn)-Nn'", // 8
- "unrecognised Y: parallel move syntax: expected N0-N7 after 'Y:(Rn)-'", // 9
- "unrecognised Y: parallel move syntax: expected '+', '-' or ',' after 'Y:(Rn)'", // 10
- "unrecognised Y: parallel move syntax: expected '+' or ')' after 'Y:(Rn'", // 11
- },
- // L:
- {
- "unrecognised L: parallel move syntax: expected '(' after 'L:-'", // 0
- "unrecognised L: parallel move syntax: expected ')' after 'L:-(Rn'", // 1
- "unrecognised L: parallel move syntax: expected R0-R7 after 'L:-('", // 2
- "unrecognised L: parallel move syntax: expected N0-N7 after 'L:(Rn+'", // 3
- "unrecognised L: parallel move syntax: expected same register number in Rn and Nn for 'L:(Rn+Nn)'", // 4
- "unrecognised L: parallel move syntax: expected ')' after 'L:(Rn+Nn'", // 5
- "unrecognised L: parallel move syntax: expected same register number in Rn and Nn for 'L:(Rn)+Nn'", // 6
- "unrecognised L: parallel move syntax: expected N0-N7 after 'L:(Rn)+'", // 7
- "unrecognised L: parallel move syntax: expected same register number in Rn and Nn for 'L:(Rn)-Nn'", // 8
- "unrecognised L: parallel move syntax: expected N0-N7 after 'L:(Rn)-'", // 9
- "unrecognised L: parallel move syntax: expected '+', '-' or ',' after 'L:(Rn)'", // 10
- "unrecognised L: parallel move syntax: expected '+' or ')' after 'L:(Rn'", // 11
- },
- // P:
- {
- "unrecognised P: effective address syntax: expected '(' after 'P:-'", // 0
- "unrecognised P: effective address syntax: expected ')' after 'P:-(Rn'", // 1
- "unrecognised P: effective address syntax: expected R0-R7 after 'P:-('", // 2
- "unrecognised P: effective address syntax: expected N0-N7 after 'P:(Rn+'", // 3
- "unrecognised P: effective address syntax: expected same register number in Rn and Nn for 'P:(Rn+Nn)'", // 4
- "unrecognised P: effective address syntax: expected ')' after 'P:(Rn+Nn'", // 5
- "unrecognised P: effective address syntax: expected same register number in Rn and Nn for 'P:(Rn)+Nn'", // 6
- "unrecognised P: effective address syntax: expected N0-N7 after 'P:(Rn)+'", // 7
- "unrecognised P: effective address syntax: expected same register number in Rn and Nn for 'P:(Rn)-Nn'", // 8
- "unrecognised P: effective address syntax: expected N0-N7 after 'P:(Rn)-'", // 9
- "unrecognised P: effective address syntax: expected '+', '-' or ',' after 'P:(Rn)'", // 10
- "unrecognised P: effective address syntax: expected '+' or ')' after 'P:(Rn'", // 11
- }
+ // X:
+ {
+ "unrecognised X: parallel move syntax: expected '(' after 'X:-'", // 0
+ "unrecognised X: parallel move syntax: expected ')' after 'X:-(Rn'", // 1
+ "unrecognised X: parallel move syntax: expected R0-R7 after 'X:-('", // 2
+ "unrecognised X: parallel move syntax: expected N0-N7 after 'X:(Rn+'", // 3
+ "unrecognised X: parallel move syntax: expected same register number in Rn and Nn for 'X:(Rn+Nn)'", // 4
+ "unrecognised X: parallel move syntax: expected ')' after 'X:(Rn+Nn'", // 5
+ "unrecognised X: parallel move syntax: expected same register number in Rn and Nn for 'X:(Rn)+Nn'", // 6
+ "unrecognised X: parallel move syntax: expected N0-N7 after 'X:(Rn)+'", // 7
+ "unrecognised X: parallel move syntax: expected same register number in Rn and Nn for 'X:(Rn)-Nn'", // 8
+ "unrecognised X: parallel move syntax: expected N0-N7 after 'X:(Rn)-'", // 9
+ "unrecognised X: parallel move syntax: expected '+', '-' or ',' after 'X:(Rn)'", // 10
+ "unrecognised X: parallel move syntax: expected '+' or ')' after 'X:(Rn'", // 11
+ },
+ // Y:
+ {
+ "unrecognised Y: parallel move syntax: expected '(' after 'Y:-'", // 0
+ "unrecognised Y: parallel move syntax: expected ')' after 'Y:-(Rn'", // 1
+ "unrecognised Y: parallel move syntax: expected R0-R7 after 'Y:-('", // 2
+ "unrecognised Y: parallel move syntax: expected N0-N7 after 'Y:(Rn+'", // 3
+ "unrecognised Y: parallel move syntax: expected same register number in Rn and Nn for 'Y:(Rn+Nn)'", // 4
+ "unrecognised Y: parallel move syntax: expected ')' after 'Y:(Rn+Nn'", // 5
+ "unrecognised Y: parallel move syntax: expected same register number in Rn and Nn for 'Y:(Rn)+Nn'", // 6
+ "unrecognised Y: parallel move syntax: expected N0-N7 after 'Y:(Rn)+'", // 7
+ "unrecognised Y: parallel move syntax: expected same register number in Rn and Nn for 'Y:(Rn)-Nn'", // 8
+ "unrecognised Y: parallel move syntax: expected N0-N7 after 'Y:(Rn)-'", // 9
+ "unrecognised Y: parallel move syntax: expected '+', '-' or ',' after 'Y:(Rn)'", // 10
+ "unrecognised Y: parallel move syntax: expected '+' or ')' after 'Y:(Rn'", // 11
+ },
+ // L:
+ {
+ "unrecognised L: parallel move syntax: expected '(' after 'L:-'", // 0
+ "unrecognised L: parallel move syntax: expected ')' after 'L:-(Rn'", // 1
+ "unrecognised L: parallel move syntax: expected R0-R7 after 'L:-('", // 2
+ "unrecognised L: parallel move syntax: expected N0-N7 after 'L:(Rn+'", // 3
+ "unrecognised L: parallel move syntax: expected same register number in Rn and Nn for 'L:(Rn+Nn)'", // 4
+ "unrecognised L: parallel move syntax: expected ')' after 'L:(Rn+Nn'", // 5
+ "unrecognised L: parallel move syntax: expected same register number in Rn and Nn for 'L:(Rn)+Nn'", // 6
+ "unrecognised L: parallel move syntax: expected N0-N7 after 'L:(Rn)+'", // 7
+ "unrecognised L: parallel move syntax: expected same register number in Rn and Nn for 'L:(Rn)-Nn'", // 8
+ "unrecognised L: parallel move syntax: expected N0-N7 after 'L:(Rn)-'", // 9
+ "unrecognised L: parallel move syntax: expected '+', '-' or ',' after 'L:(Rn)'", // 10
+ "unrecognised L: parallel move syntax: expected '+' or ')' after 'L:(Rn'", // 11
+ },
+ // P:
+ {
+ "unrecognised P: effective address syntax: expected '(' after 'P:-'", // 0
+ "unrecognised P: effective address syntax: expected ')' after 'P:-(Rn'", // 1
+ "unrecognised P: effective address syntax: expected R0-R7 after 'P:-('", // 2
+ "unrecognised P: effective address syntax: expected N0-N7 after 'P:(Rn+'", // 3
+ "unrecognised P: effective address syntax: expected same register number in Rn and Nn for 'P:(Rn+Nn)'", // 4
+ "unrecognised P: effective address syntax: expected ')' after 'P:(Rn+Nn'", // 5
+ "unrecognised P: effective address syntax: expected same register number in Rn and Nn for 'P:(Rn)+Nn'", // 6
+ "unrecognised P: effective address syntax: expected N0-N7 after 'P:(Rn)+'", // 7
+ "unrecognised P: effective address syntax: expected same register number in Rn and Nn for 'P:(Rn)-Nn'", // 8
+ "unrecognised P: effective address syntax: expected N0-N7 after 'P:(Rn)-'", // 9
+ "unrecognised P: effective address syntax: expected '+', '-' or ',' after 'P:(Rn)'", // 10
+ "unrecognised P: effective address syntax: expected '+' or ')' after 'P:(Rn'", // 11
+ }
};
enum
{
- NUM_NORMAL = 0,
- NUM_FORCE_LONG = 1,
- NUM_FORCE_SHORT = 2
+ NUM_NORMAL = 0,
+ NUM_FORCE_LONG = 1,
+ NUM_FORCE_SHORT = 2
};
//
//
static inline int dsp_parmode(int *am, int *areg, TOKEN * AnEXPR, uint64_t * AnEXVAL, WORD * AnEXATTR, SYM ** AnESYM, LONG *memspace, LONG *perspace, const int operand)
{
- if (*tok == KW_A || *tok == KW_B)
- {
- *am = M_ACC56;
- *areg = *tok++;
- return OK;
- }
- else if (*tok == '#')
- {
- tok++;
+ if (*tok == KW_A || *tok == KW_B)
+ {
+ *am = M_ACC56;
+ *areg = *tok++;
+ return OK;
+ }
+ else if (*tok == '#')
+ {
+ tok++;
- if (*tok == '<')
- {
- // Immediate Short Addressing Mode Force Operator
- tok++;
- if (expr(AnEXPR, AnEXVAL, AnEXATTR, AnESYM) != OK)
- return ERROR;
- if (*AnEXVAL > 0xfff && *AnEXVAL<-4096)
- return error("immediate short addressing mode forced but address is bigger than $fff");
- if ((int32_t)*AnEXVAL <= 0xff && (int32_t)*AnEXVAL>-0x100)
- {
- *am = M_DSPIM8;
- return OK;
- }
- *am = M_DSPIM12;
- return OK;
- }
- else if (*tok == '>')
- {
- // Immediate Long Addressing Mode Force Operator
- tok++;
- if (expr(AnEXPR, AnEXVAL, AnEXATTR, AnESYM) != OK)
- return ERROR;
- if ((int32_t)*AnEXVAL > 0xffffff || (int32_t)*AnEXVAL < -0xffffff)
- return error("long immediate is bigger than $ffffff");
- *am = M_DSPIM;
- return OK;
- }
+ if (*tok == '<')
+ {
+ // Immediate Short Addressing Mode Force Operator
+ tok++;
+ if (expr(AnEXPR, AnEXVAL, AnEXATTR, AnESYM) != OK)
+ return ERROR;
- if (expr(AnEXPR, AnEXVAL, AnEXATTR, AnESYM) != OK)
- return ERROR;
+ if (*AnEXVAL > 0xFFF && *AnEXVAL < -4096)
+ return error("immediate short addressing mode forced but address is bigger than $FFF");
- if (*AnEXATTR & DEFINED)
- {
+ if ((int32_t)*AnEXVAL <= 0xFF && (int32_t)*AnEXVAL > -0x100)
+ {
+ *am = M_DSPIM8;
+ return OK;
+ }
+
+ *am = M_DSPIM12;
+ return OK;
+ }
+ else if (*tok == '>')
+ {
+ // Immediate Long Addressing Mode Force Operator
+ tok++;
+
+ if (expr(AnEXPR, AnEXVAL, AnEXATTR, AnESYM) != OK)
+ return ERROR;
+
+ if ((int32_t)*AnEXVAL > 0xFFFFFF || (int32_t)*AnEXVAL < -0xFFFFFF)
+ return error("long immediate is bigger than $FFFFFF");
+
+ *am = M_DSPIM;
+ return OK;
+ }
+
+ if (expr(AnEXPR, AnEXVAL, AnEXATTR, AnESYM) != OK)
+ return ERROR;
+
+ if (*AnEXATTR & DEFINED)
+ {
if ((int32_t)*AnEXVAL < 0x100 && (int32_t)*AnEXVAL >= -0x100)
{
- *AnEXVAL &= 0xff;
+ *AnEXVAL &= 0xFF;
*am = M_DSPIM8;
}
- else if (*AnEXVAL < 0x1000)
- *am = M_DSPIM12;
- else
- *am = M_DSPIM;
- }
- else
- {
- // We have no clue what size our immediate will be
- // so we have to assume the worst
- *am = M_DSPIM;
- }
- return OK;
- }
- else if (*tok >= KW_X0 && *tok <= KW_Y1)
- {
- *am = M_ALU24;
- *areg = *tok++;
- return OK;
- }
- else if (*tok == KW_X && *(tok + 1) == ':')
- {
- tok = tok + 2;
- if (*tok == CONST || *tok == FCONST || *tok == SYMBOL)
- {
- if (expr(AnEXPR, AnEXVAL, AnEXATTR, AnESYM) != OK)
- return ERROR;
+ else if (*AnEXVAL < 0x1000)
+ *am = M_DSPIM12;
+ else
+ *am = M_DSPIM;
+ }
+ else
+ {
+ // We have no clue what size our immediate will be
+ // so we have to assume the worst
+ *am = M_DSPIM;
+ }
+
+ return OK;
+ }
+ else if (*tok >= KW_X0 && *tok <= KW_Y1)
+ {
+ *am = M_ALU24;
+ *areg = *tok++;
+ return OK;
+ }
+ else if (*tok == KW_X && *(tok + 1) == ':')
+ {
+ tok = tok + 2;
+
+ if (*tok == CONST || *tok == FCONST || *tok == SYMBOL)
+ {
+ if (expr(AnEXPR, AnEXVAL, AnEXATTR, AnESYM) != OK)
+ return ERROR;
+
if (*AnEXATTR & DEFINED)
{
- if (*AnEXVAL > 0xffffff)
- return error("long address is bigger than $ffffff");
+ if (*AnEXVAL > 0xFFFFFF)
+ return error("long address is bigger than $FFFFFF");
+
*memspace = 0 << 6; // Mark we're on X memory space
- // Check if value is between $ffc0 and $ffff, AKA X:pp
- {
- uint32_t temp = (LONG)(((int32_t)(((uint32_t)*AnEXVAL) << (32 - 6))) >> (32 - 6)); // Sign extend 6 to 32 bits
- if ((temp >= 0xffffffc0 /* Check for 32bit sign extended number */
- && ((int32_t)*AnEXVAL<0)) /* Check if 32bit signed number is negative*/
- ||(*AnEXVAL<0xffff && *AnEXVAL>=0x8000)) /* Check if 16bit number is negative*/
- {
- *AnEXVAL = temp;
- *am = M_DSPPP;
- *memspace = 0 << 6; // Mark we're on X memory space
- *perspace = 0 << 16; // Mark we're on X peripheral space
- *areg = *AnEXVAL & 0x3f; // Since this is only going to get used in dsp_ea_imm5...
- return OK;
- }
+ // Check if value is between $FFC0 and $FFFF, AKA X:pp
+ uint32_t temp = (LONG)(((int32_t)(((uint32_t)*AnEXVAL) << (32 - 6))) >> (32 - 6)); // Sign extend 6 to 32 bits
+ if ((temp >= 0xFFFFFFC0 /* Check for 32bit sign extended number */
+ && ((int32_t)*AnEXVAL < 0)) /* Check if 32bit signed number is negative*/
+ || (*AnEXVAL < 0xFFFF && *AnEXVAL >= 0x8000)) /* Check if 16bit number is negative*/
+ {
+ *AnEXVAL = temp;
+ *am = M_DSPPP;
+ *memspace = 0 << 6; // Mark we're on X memory space
+ *perspace = 0 << 16; // Mark we're on X peripheral space
+ *areg = *AnEXVAL & 0x3F; // Since this is only going to get used in dsp_ea_imm5...
+ return OK;
}
// If the symbol/expression is defined then check for valid range.
// Otherwise the value had better fit or Fixups will bark!
- if (*AnEXVAL > 0x3f)
+ if (*AnEXVAL > 0x3F)
{
*am = M_DSPEA;
*areg = DSP_EA_ABS;
*am = M_DSPEA;
*areg = DSP_EA_ABS;
}
- return OK;
- }
- else if (*tok == '<')
- {
- // X:aa
- // Short Addressing Mode Force Operator in the case of '<'
- tok++;
- if (expr(AnEXPR, AnEXVAL, AnEXATTR, AnESYM) != OK)
- return ERROR;
+
+ return OK;
+ }
+ else if (*tok == '<')
+ {
+ // X:aa
+ // Short Addressing Mode Force Operator in the case of '<'
+ tok++;
+
+ if (expr(AnEXPR, AnEXVAL, AnEXATTR, AnESYM) != OK)
+ return ERROR;
// If the symbol/expression is defined then check for valid range.
// Otherwise the value had better fit or Fixups will bark!
if (*AnEXATTR & DEFINED)
{
- if (*AnEXVAL > 0x3f)
- return error("short addressing mode forced but address is bigger than $3f");
+ if (*AnEXVAL > 0x3F)
+ return error("short addressing mode forced but address is bigger than $3F");
}
- else
- {
- // Mark it as a fixup
- deposit_extra_ea = DEPOSIT_EXTRA_FIXUP;
- }
- *am = M_DSPAA;
- *memspace = 0 << 6; // Mark we're on X memory space
- *areg = (int)*AnEXVAL; // Since this is only going to get used in dsp_ea_imm5...
- return OK;
- }
+ else
+ {
+ // Mark it as a fixup
+ deposit_extra_ea = DEPOSIT_EXTRA_FIXUP;
+ }
+
+ *am = M_DSPAA;
+ *memspace = 0 << 6; // Mark we're on X memory space
+ *areg = (int)*AnEXVAL; // Since this is only going to get used in dsp_ea_imm5...
+ return OK;
+ }
else if (*tok == '>')
{
// Long Addressing Mode Force Operator
{
if (expr(AnEXPR, AnEXVAL, AnEXATTR, AnESYM) != OK)
return ERROR;
+
if (*AnEXATTR&DEFINED)
{
- if (*AnEXVAL > 0xffffff)
- return error("long address is bigger than $ffffff");
- *memspace = 0 << 6; // Mark we're on X memory space
+ if (*AnEXVAL > 0xFFFFFF)
+ return error("long address is bigger than $FFFFFF");
+ *memspace = 0 << 6; // Mark we're on X memory space
*am = M_DSPEA;
*areg = DSP_EA_ABS;
}
return OK;
}
}
- else if (*tok == SHL) // '<<'
- {
- // I/O Short Addressing Mode Force Operator
- // X:pp
- tok++;
- if (expr(AnEXPR, AnEXVAL, AnEXATTR, AnESYM) != OK)
- return ERROR;
+ else if (*tok == SHL) // '<<'
+ {
+ // I/O Short Addressing Mode Force Operator
+ // X:pp
+ tok++;
+
+ if (expr(AnEXPR, AnEXVAL, AnEXATTR, AnESYM) != OK)
+ return ERROR;
// If the symbol/expression is defined then check for valid range.
// Otherwise the value had better fit or Fixups will bark!
if (*AnEXATTR & DEFINED)
{
*AnEXVAL = (LONG)(((int32_t)(((uint32_t)*AnEXVAL) << (32 - 6))) >> (32 - 6)); // Sign extend 6 to 32 bits
- if (*AnEXVAL < 0xffffffc0)
- return error("I/O Short Addressing Mode addresses must be between $ffc0 and $ffff");
+
+ if (*AnEXVAL < 0xFFFFFFC0)
+ return error("I/O Short Addressing Mode addresses must be between $FFC0 and $FFFF");
}
- *am = M_DSPPP;
- *memspace = 0 << 6; // Mark we're on X memory space
- *perspace = 0 << 16; // Mark we're on X peripheral space
- *areg = *AnEXVAL & 0x3f; // Since this is only going to get used in dsp_ea_imm5...
- return OK;
- }
- if ((*areg = checkea(0, X_ERRORS)) != ERROR)
- {
- // TODO: what if we need M_DSPAA here????
- *memspace = 0 << 6; // Mark we're on X memory space
- *am = M_DSPEA;
- return OK;
- }
- else
- return ERROR;
+ *am = M_DSPPP;
+ *memspace = 0 << 6; // Mark we're on X memory space
+ *perspace = 0 << 16; // Mark we're on X peripheral space
+ *areg = *AnEXVAL & 0x3f; // Since this is only going to get used in dsp_ea_imm5...
+ return OK;
+ }
- }
- else if (*tok == KW_Y && *(tok + 1) == ':')
- {
- tok = tok + 2;
+ if ((*areg = checkea(0, X_ERRORS)) != ERROR)
+ {
+ // TODO: what if we need M_DSPAA here????
+ *memspace = 0 << 6; // Mark we're on X memory space
+ *am = M_DSPEA;
+ return OK;
+ }
+ else
+ return ERROR;
+ }
+ else if (*tok == KW_Y && *(tok + 1) == ':')
+ {
+ tok = tok + 2;
- if (*tok == CONST || *tok == FCONST || *tok == SYMBOL)
- {
- if (expr(AnEXPR, AnEXVAL, AnEXATTR, AnESYM) != OK)
- return ERROR;
- if (*AnEXVAL > 0xffffff)
- return error("long address is bigger than $ffffff");
- *memspace = 1 << 6; // Mark we're on Y memory space
+ if (*tok == CONST || *tok == FCONST || *tok == SYMBOL)
+ {
+ if (expr(AnEXPR, AnEXVAL, AnEXATTR, AnESYM) != OK)
+ return ERROR;
+
+ if (*AnEXVAL > 0xFFFFFF)
+ return error("long address is bigger than $FFFFFF");
+
+ *memspace = 1 << 6; // Mark we're on Y memory space
// Check if value is between $ffc0 and $ffff, AKA Y:pp
- {
- uint32_t temp = (LONG)(((int32_t)(((uint32_t)*AnEXVAL) << (32 - 6))) >> (32 - 6)); // Sign extend 6 to 32 bits
- if ((temp >= 0xffffffc0 /* Check for 32bit sign extended number */
- && ((int32_t)*AnEXVAL<0)) /* Check if 32bit signed number is negative*/
- || (*AnEXVAL<0xffff && *AnEXVAL >= 0x8000)) /* Check if 16bit number is negative*/
- {
- *AnEXVAL = temp;
- *am = M_DSPPP;
- *perspace = 1 << 16; // Mark we're on X peripheral space
- *areg = *AnEXVAL & 0x3f; // Since this is only going to get used in dsp_ea_imm5...
- return OK;
- }
+ uint32_t temp = (LONG)(((int32_t)(((uint32_t)*AnEXVAL) << (32 - 6))) >> (32 - 6)); // Sign extend 6 to 32 bits
+ if ((temp >= 0xFFFFFFC0 /* Check for 32bit sign extended number */
+ && ((int32_t)*AnEXVAL < 0)) /* Check if 32bit signed number is negative*/
+ || (*AnEXVAL < 0xFFFF && *AnEXVAL >= 0x8000)) /* Check if 16bit number is negative*/
+ {
+ *AnEXVAL = temp;
+ *am = M_DSPPP;
+ *perspace = 1 << 16; // Mark we're on X peripheral space
+ *areg = *AnEXVAL & 0x3F; // Since this is only going to get used in dsp_ea_imm5...
+ return OK;
}
// If the symbol/expression is defined then check for valid range.
// Otherwise the value had better fit or Fixups will bark!
if (*AnEXATTR & DEFINED)
{
- if (*AnEXVAL > 0x3f)
+ if (*AnEXVAL > 0x3F)
{
*am = M_DSPEA;
*areg = DSP_EA_ABS;
*areg = DSP_EA_ABS;
}
- return OK;
- }
- else if (*tok == '<')
- {
- // Y:aa
- // Short Addressing Mode Force Operator in the case of '<'
- tok++;
- if (expr(AnEXPR, AnEXVAL, AnEXATTR, AnESYM) != OK)
- return ERROR;
+ return OK;
+ }
+ else if (*tok == '<')
+ {
+ // Y:aa
+ // Short Addressing Mode Force Operator in the case of '<'
+ tok++;
+
+ if (expr(AnEXPR, AnEXVAL, AnEXATTR, AnESYM) != OK)
+ return ERROR;
// If the symbol/expression is defined then check for valid range.
// Otherwise the value had better fit or Fixups will bark!
if (*AnEXATTR & DEFINED)
{
- if (*AnEXVAL > 0x3f)
+ if (*AnEXVAL > 0x3F)
{
- warn("short addressing mode forced but address is bigger than $3f - switching to long");
+ warn("short addressing mode forced but address is bigger than $3F - switching to long");
*am = M_DSPEA;
*memspace = 1 << 6; // Mark we're on Y memory space
*areg = DSP_EA_ABS;
return OK;
}
}
- else
- {
- // Mark it as a fixup
- deposit_extra_ea = DEPOSIT_EXTRA_FIXUP;
- }
+ else
+ {
+ // Mark it as a fixup
+ deposit_extra_ea = DEPOSIT_EXTRA_FIXUP;
+ }
- *am = M_DSPAA;
- *memspace = 1 << 6; // Mark we're on Y memory space
- *areg = (int)*AnEXVAL; // Since this is only going to get used in dsp_ea_imm5...
- return OK;
- }
- else if (*tok == '>')
- {
- // Long Addressing Mode Force Operator
+ *am = M_DSPAA;
+ *memspace = 1 << 6; // Mark we're on Y memory space
+ *areg = (int)*AnEXVAL; // Since this is only going to get used in dsp_ea_imm5...
+ return OK;
+ }
+ else if (*tok == '>')
+ {
+ // Long Addressing Mode Force Operator
tok++;
if (*tok == CONST || *tok == FCONST || *tok == SYMBOL)
{
if (expr(AnEXPR, AnEXVAL, AnEXATTR, AnESYM) != OK)
return ERROR;
+
if (*AnEXATTR&DEFINED)
{
- if (*AnEXVAL > 0xffffff)
- return error("long address is bigger than $ffffff");
+ if (*AnEXVAL > 0xFFFFFF)
+ return error("long address is bigger than $FFFFFF");
+
*memspace = 1 << 6; // Mark we're on Y memory space
*am = M_DSPEA;
return OK;
}
}
- else if (*tok == SHL) // '<<'
- {
- // I/O Short Addressing Mode Force Operator
- // Y:pp
- tok++;
- if (expr(AnEXPR, AnEXVAL, AnEXATTR, AnESYM) != OK)
- return ERROR;
+ else if (*tok == SHL) // '<<'
+ {
+ // I/O Short Addressing Mode Force Operator
+ // Y:pp
+ tok++;
+
+ if (expr(AnEXPR, AnEXVAL, AnEXATTR, AnESYM) != OK)
+ return ERROR;
// If the symbol/expression is defined then check for valid range.
// Otherwise the value had better fit or Fixups will bark!
if (*AnEXATTR & DEFINED)
{
*AnEXVAL = (LONG)(((int32_t)(((uint32_t)*AnEXVAL) << (32 - 6))) >> (32 - 6)); // Sign extend 6 to 32 bits
- if (*AnEXVAL < 0xffffffc0)
- return error("I/O Short Addressing Mode addresses must be between $ffe0 and $1f");
+
+ if (*AnEXVAL < 0xFFFFFFC0)
+ return error("I/O Short Addressing Mode addresses must be between $FFE0 and $1F");
}
- *am = M_DSPPP;
- *memspace = 1 << 6; // Mark we're on Y memory space
- *perspace = 1 << 16; // Mark we're on Y peripheral space
- *areg = *AnEXVAL & 0x3f; // Since this is only going to get used in dsp_ea_imm5...
- return OK;
- }
- if ((*areg = checkea(0, X_ERRORS)) != ERROR)
- {
- *memspace = 1 << 6; // Mark we're on Y memory space
- *am = M_DSPEA;
- return OK;
- }
- else
- return ERROR;
- // TODO: add absolute address checks
+ *am = M_DSPPP;
+ *memspace = 1 << 6; // Mark we're on Y memory space
+ *perspace = 1 << 16; // Mark we're on Y peripheral space
+ *areg = *AnEXVAL & 0x3F; // Since this is only going to get used in dsp_ea_imm5...
+ return OK;
+ }
- }
- else if (*tok >= KW_X&&*tok <= KW_Y)
- {
- *am = M_INP48;
- *areg = *tok++;
- return OK;
- }
- else if (*tok >= KW_M0 && *tok <= KW_M7)
- {
- *am = M_DSPM;
- *areg = (*tok++) & 7;
- return OK;
- }
- else if (*tok >= KW_R0 && *tok <= KW_R7)
- {
- *am = M_DSPR;
- *areg = (*tok++) - KW_R0;
- return OK;
- }
- else if (*tok >= KW_N0 && *tok <= KW_N7)
- {
- *am = M_DSPN;
- *areg = (*tok++) & 7;
- return OK;
- }
- else if (*tok == KW_A0 || *tok == KW_A1 || *tok == KW_B0 || *tok == KW_B1)
- {
- *am = M_ACC24;
- *areg = *tok++;
- return OK;
- }
- else if (*tok == KW_A2 || *tok == KW_B2)
- {
- *am = M_ACC8;
- *areg = *tok++;
- return OK;
- }
- else if (*tok == '-' && (*(tok + 1) == KW_X0 || *(tok + 1) == KW_X1 || *(tok + 1) == KW_Y0 || *(tok + 1) == KW_Y1))
- {
- // '-X0', '-Y0', '-X1' or '-Y1', used in multiplications
- tok++;
+ if ((*areg = checkea(0, X_ERRORS)) != ERROR)
+ {
+ *memspace = 1 << 6; // Mark we're on Y memory space
+ *am = M_DSPEA;
+ return OK;
+ }
+ else
+ return ERROR;
+ // TODO: add absolute address checks
+ }
+ else if ((*tok >= KW_X) && (*tok <= KW_Y))
+ {
+ *am = M_INP48;
+ *areg = *tok++;
+ return OK;
+ }
+ else if ((*tok >= KW_M0) && (*tok <= KW_M7))
+ {
+ *am = M_DSPM;
+ *areg = (*tok++) & 7;
+ return OK;
+ }
+ else if ((*tok >= KW_R0) && (*tok <= KW_R7))
+ {
+ *am = M_DSPR;
+ *areg = (*tok++) - KW_R0;
+ return OK;
+ }
+ else if ((*tok >= KW_N0) && (*tok <= KW_N7))
+ {
+ *am = M_DSPN;
+ *areg = (*tok++) & 7;
+ return OK;
+ }
+ else if ((*tok == KW_A0) || (*tok == KW_A1) || (*tok == KW_B0)
+ || (*tok == KW_B1))
+ {
+ *am = M_ACC24;
+ *areg = *tok++;
+ return OK;
+ }
+ else if ((*tok == KW_A2) || (*tok == KW_B2))
+ {
+ *am = M_ACC8;
+ *areg = *tok++;
+ return OK;
+ }
+ else if ((*tok == '-') && (*(tok + 1) == KW_X0 || *(tok + 1) == KW_X1 || *(tok + 1) == KW_Y0 || *(tok + 1) == KW_Y1))
+ {
+ // '-X0', '-Y0', '-X1' or '-Y1', used in multiplications
+ tok++;
- // Check to see if this is the first operand
- if (operand != 0)
- return error("-x0/-x1/-y0/-y1 only allowed in the first operand");
+ // Check to see if this is the first operand
+ if (operand != 0)
+ return error("-x0/-x1/-y0/-y1 only allowed in the first operand");
+
+ *am = M_ALU24;
+ *areg = *tok++;
+ dsp_k = 1 << 2;
+ return OK;
+ }
+ else if (*tok == '+' && (*(tok + 1) == KW_X0 || *(tok + 1) == KW_X1 || *(tok + 1) == KW_Y0 || *(tok + 1) == KW_Y1))
+ {
+ // '+X0', '+Y0', '+X1' or '+Y1', used in multiplications
+ tok++;
- *am = M_ALU24;
- *areg = *tok++;
- dsp_k = 1 << 2;
- return OK;
- }
- else if (*tok == '+' && (*(tok + 1) == KW_X0 || *(tok + 1) == KW_X1 || *(tok + 1) == KW_Y0 || *(tok + 1) == KW_Y1))
- {
- // '+X0', '+Y0', '+X1' or '+Y1', used in multiplications
- tok++;
+ // Check to see if this is the first operand
+ if (operand != 0)
+ return error("+x0/+x1/+y0/+y1 only allowed in the first operand");
+
+ *am = M_ALU24;
+ *areg = *tok++;
+ dsp_k = 0 << 2;
+ return OK;
+ }
+ else if (*tok == '(' || *tok == '-')
+ {
+ // Could be either an expression or ea mode
+ if (*tok + 1 == SYMBOL)
+ {
+ tok++;
- // Check to see if this is the first operand
- if (operand != 0)
- return error("+x0/+x1/+y0/+y1 only allowed in the first operand");
+ if (expr(AnEXPR, AnEXVAL, AnEXATTR, AnESYM) != OK)
+ return ERROR;
- *am = M_ALU24;
- *areg = *tok++;
- dsp_k = 0 << 2;
- return OK;
- }
- else if (*tok == '(' || *tok == '-')
- {
- // Could be either an expression or ea mode
- if (*tok + 1 == SYMBOL)
- {
- tok++;
+ *am = M_DSPIM;
+ return OK;
+ }
- if (expr(AnEXPR, AnEXVAL, AnEXATTR, AnESYM) != OK)
- return ERROR;
+ if ((*areg = checkea(0, P_ERRORS)) != ERROR)
+ {
+ *am = M_DSPEA;
+ return OK;
+ }
+ else
+ return ERROR;
+
+ // TODO: add absolute address checks
+ return error("internal assembler error: parmode checking for '(' and '-' does not have absolute address checks yet!");
+ }
+ else if (*tok == KW_P && *(tok + 1) == ':')
+ {
+ tok = tok + 2;
- *am = M_DSPIM;
- return OK;
- }
- if ((*areg = checkea(0, P_ERRORS)) != ERROR)
- {
- *am = M_DSPEA;
- return OK;
- }
- else
- return ERROR;
- // TODO: add absolute address checks
- return error("internal assembler error: parmode checking for '(' and '-' does not have absolute address checks yet!");
- }
- else if (*tok == KW_P && *(tok + 1) == ':')
- {
- tok = tok + 2;
if (*tok == CONST || *tok == FCONST || *tok == SYMBOL)
- {
- // Address
- if (expr(AnEXPR, AnEXVAL, AnEXATTR, AnESYM) != OK)
- return ERROR;
- if (*AnEXVAL > 0xffffff)
- return error("long address is bigger than $ffffff");
- if (*AnEXVAL > 0x3f)
- {
- *am = M_DSPEA;
- *areg = DSP_EA_ABS;
- }
- else
- {
- *areg = (int)*AnEXVAL; // Lame, but what the hell
- *am = M_DSPAA;
- }
- return OK;
- }
- else if (*tok == '<')
- {
- // X:aa
- // Short Addressing Mode Force Operator in the case of '<'
- tok++;
- if (expr(AnEXPR, AnEXVAL, AnEXATTR, AnESYM) != OK)
- return ERROR;
- if (*AnEXVAL > 0x3f)
- return error("short addressing mode forced but address is bigger than $3f");
- *am = M_DSPAA;
- *areg = (int)*AnEXVAL; // Since this is only going to get used in dsp_ea_imm5...
- return OK;
- }
- else if (*tok == '>')
- {
- // Long Addressing Mode Force Operator
- tok++;
- // Immediate Short Addressing Mode Force Operator
- if (expr(AnEXPR, AnEXVAL, AnEXATTR, AnESYM) != OK)
- return ERROR;
- if (*AnEXATTR & DEFINED)
- {
- if (*AnEXVAL > 0xffffff)
- return error("long address is bigger than $ffffff");
- }
- *am = M_DSPEA;
- *areg = DSP_EA_ABS;
- return OK;
- }
+ {
+ // Address
+ if (expr(AnEXPR, AnEXVAL, AnEXATTR, AnESYM) != OK)
+ return ERROR;
- if ((*areg = checkea(0, P_ERRORS)) != ERROR)
- {
- *am = M_DSPEA;
- return OK;
- }
- else
- return ERROR;
+ if (*AnEXVAL > 0xFFFFFF)
+ return error("long address is bigger than $FFFFFF");
- }
- else if (*tok == SHL)
- {
- // I/O Short Addressing Mode Force Operator
- tok++;
- if (expr(AnEXPR, AnEXVAL, AnEXATTR, AnESYM) != OK)
- return ERROR;
- if (*AnEXVAL > 0xfff)
- return error("I/O short addressing mode forced but address is bigger than $fff");
- *am = M_DSPABS06;
- return OK;
- }
- else if (*tok == '<')
- {
- // Short Addressing Mode Force Operator
- tok++;
- if (expr(AnEXPR, AnEXVAL, AnEXATTR, AnESYM) != OK)
- return ERROR;
- if (*AnEXATTR & DEFINED)
- {
- if (*AnEXVAL > 0xfff)
- return error("short addressing mode forced but address is bigger than $fff");
- }
- *am = M_DSPABS12;
- return OK;
- }
- else if (*tok == '>')
- {
- // Long Addressing Mode Force Operator
- tok++;
- // Immediate Short Addressing Mode Force Operator
- if (expr(AnEXPR, AnEXVAL, AnEXATTR, AnESYM) != OK)
- return ERROR;
- if (*AnEXATTR & DEFINED)
- {
- if (*AnEXVAL > 0xffffff)
- return error("long address is bigger than $ffffff");
- }
- *am = M_DSPEA;
- *areg = DSP_EA_ABS;
- return OK;
- }
+ if (*AnEXVAL > 0x3F)
+ {
+ *am = M_DSPEA;
+ *areg = DSP_EA_ABS;
+ }
+ else
+ {
+ *areg = (int)*AnEXVAL; // Lame, but what the hell
+ *am = M_DSPAA;
+ }
- else if (*tok == KW_PC || *tok == KW_CCR || *tok == KW_SR || *tok == KW_SP || (*tok >= KW_MR&&*tok <= KW_SS))
- {
- *areg = *tok++;
- *am = M_DSPPCU;
- return OK;
- }
- // expr
- else
- {
- if (expr(AnEXPR, AnEXVAL, AnEXATTR, AnESYM) != OK)
- return ERROR;
+ return OK;
+ }
+ else if (*tok == '<')
+ {
+ // X:aa
+ // Short Addressing Mode Force Operator in the case of '<'
+ tok++;
- // We'll store M_DSPEA_ABS in areg and if we have
- // any extra info, it'll go in am
- if (*AnEXATTR & DEFINED)
- {
- *areg = DSP_EA_ABS;
- if (*AnEXVAL < 0x1000)
- *am = M_DSPABS12;
- else if (*AnEXVAL < 0x10000)
- *am = M_DSPABS16;
- else if (*AnEXVAL < 0x1000000)
- *am = M_DSPABS24;
- else
- return error("address must be smaller than $1000000");
- return OK;
- }
- else
- {
- // Well, we have no opinion on the expression's size, so let's assume the worst
- *areg = DSP_EA_ABS;
- *am = M_DSPABS24;
- return OK;
- }
- }
- return error("internal assembler error: Please report this error message: 'reached the end of dsp_parmode' with the line of code that caused it. Thanks, and sorry for the inconvenience"); // Something bad happened
-}
+ if (expr(AnEXPR, AnEXVAL, AnEXATTR, AnESYM) != OK)
+ return ERROR;
-//
-// Parse all addressing modes except parallel moves
-//
-int dsp_amode(int maxea)
-{
- LONG dummy;
- // Initialize global return values
- nmodes = dsp_a0reg = dsp_a1reg = 0;
- dsp_am0 = dsp_am1 = M_AM_NONE;
- dsp_a0expr[0] = dsp_a1expr[0] = ENDEXPR;
- dsp_a0exval = 0;
- dsp_a1exval = 0;
- dsp_a0exattr = dsp_a1exattr = 0;
- dsp_a0esym = dsp_a1esym = (SYM *)NULL;
- dsp_a0memspace = dsp_a1memspace = -1;
- dsp_a0perspace = dsp_a1perspace = -1;
- dsp_k = 0;
-
- // If at EOL, then no addr modes at all
- if (*tok == EOL)
- return 0;
-
- if (dsp_parmode(&dsp_am0, &dsp_a0reg, dsp_a0expr, &dsp_a0exval, &dsp_a0exattr, &dsp_a0esym, &dsp_a0memspace, &dsp_a0perspace, 0) == ERROR)
- return ERROR;
-
-
- // 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 (*tok != ',')
- {
- if (dsp_k != 0)
- return error("-x0/-x1/-y0/-y1 only allowed in multiply operations");
+ if (*AnEXVAL > 0x3F)
+ return error("short addressing mode forced but address is bigger than $3F");
- return 1;
- }
+ *am = M_DSPAA;
+ *areg = (int)*AnEXVAL; // Since this is only going to get used in dsp_ea_imm5...
+ return OK;
+ }
+ else if (*tok == '>')
+ {
+ // Long Addressing Mode Force Operator
+ tok++;
- // Eat the comma
- tok++;
+ // Immediate Short Addressing Mode Force Operator
+ if (expr(AnEXPR, AnEXVAL, AnEXATTR, AnESYM) != OK)
+ return ERROR;
- // Parse second addressing mode
- if (dsp_parmode(&dsp_am1, &dsp_a1reg, dsp_a1expr, &dsp_a1exval, &dsp_a1exattr, &dsp_a1esym, &dsp_a1memspace, &dsp_a1perspace, 1) == ERROR)
- return ERROR;
+ if (*AnEXATTR & DEFINED)
+ {
+ if (*AnEXVAL > 0xFFFFFF)
+ return error("long address is bigger than $FFFFFF");
+ }
- if (maxea == 2 || *tok == EOL)
- {
- if (dsp_k != 0)
- return error("-x0/-x1/-y0/-y1 only allowed in multiply operations");
+ *am = M_DSPEA;
+ *areg = DSP_EA_ABS;
+ return OK;
+ }
- nmodes = 2;
- return 2;
- }
+ if ((*areg = checkea(0, P_ERRORS)) != ERROR)
+ {
+ *am = M_DSPEA;
+ return OK;
+ }
+ else
+ return ERROR;
+ }
+ else if (*tok == SHL)
+ {
+ // I/O Short Addressing Mode Force Operator
+ tok++;
- if (*tok == ',')
- {
- // Only MAC-like or jsset/clr/tst/chg instructions here
- tok++;
- if (dsp_parmode(&dsp_am2, &dsp_a2reg, dsp_a2expr, &dsp_a2exval, &dsp_a2exattr, &dsp_a2esym, &dummy, &dummy, 2) == ERROR)
- return ERROR;
- if (maxea == 3)
- return 3;
- if (*tok != EOL)
- return error(extra_stuff);
- nmodes = 3;
- return 3;
+ if (expr(AnEXPR, AnEXVAL, AnEXATTR, AnESYM) != OK)
+ return ERROR;
- }
+ if (*AnEXVAL > 0xFFF)
+ return error("I/O short addressing mode forced but address is bigger than $FFF");
- // Only Tcc instructions here, and then only those that accept 4 operands
+ *am = M_DSPABS06;
+ return OK;
+ }
+ else if (*tok == '<')
+ {
+ // Short Addressing Mode Force Operator
+ tok++;
- if (dsp_parmode(&dsp_am2, &dsp_a2reg, dsp_a2expr, &dsp_a2exval, &dsp_a2exattr, &dsp_a2esym, &dummy, &dummy, 2) == ERROR)
- return ERROR;
+ if (expr(AnEXPR, AnEXVAL, AnEXATTR, AnESYM) != OK)
+ return ERROR;
- if (*tok++ != ',')
- return error("expected 4 parameters");
+ if (*AnEXATTR & DEFINED)
+ {
+ if (*AnEXVAL > 0xFFF)
+ return error("short addressing mode forced but address is bigger than $FFF");
+ }
- if (dsp_parmode(&dsp_am3, &dsp_a3reg, dsp_a3expr, &dsp_a3exval, &dsp_a3exattr, &dsp_a3esym, &dummy, &dummy, 3) == ERROR)
- return ERROR;
+ *am = M_DSPABS12;
+ return OK;
+ }
+ else if (*tok == '>')
+ {
+ // Long Addressing Mode Force Operator
+ tok++;
- if (*tok == EOL)
- {
- if (dsp_k != 0)
- return error("-x0/-x1/-y0/-y1 only allowed in multiply operations");
+ // Immediate Short Addressing Mode Force Operator
+ if (expr(AnEXPR, AnEXVAL, AnEXATTR, AnESYM) != OK)
+ return ERROR;
- nmodes = 4;
- return 4;
- }
- else
- {
- // Tcc instructions do not support parallel moves, so any remaining tokens are garbage
- return error(extra_stuff);
- }
+ if (*AnEXATTR & DEFINED)
+ {
+ if (*AnEXVAL > 0xFFFFFF)
+ return error("long address is bigger than $FFFFFF");
+ }
+
+ *am = M_DSPEA;
+ *areg = DSP_EA_ABS;
+ return OK;
+ }
+ else if (*tok == KW_PC || *tok == KW_CCR || *tok == KW_SR || *tok == KW_SP || (*tok >= KW_MR&&*tok <= KW_SS))
+ {
+ *areg = *tok++;
+ *am = M_DSPPCU;
+ return OK;
+ }
+ // expr
+ else
+ {
+ if (expr(AnEXPR, AnEXVAL, AnEXATTR, AnESYM) != OK)
+ return ERROR;
+
+ // We'll store M_DSPEA_ABS in areg and if we have
+ // any extra info, it'll go in am
+ if (*AnEXATTR & DEFINED)
+ {
+ *areg = DSP_EA_ABS;
+
+ if (*AnEXVAL < 0x1000)
+ *am = M_DSPABS12;
+ else if (*AnEXVAL < 0x10000)
+ *am = M_DSPABS16;
+ else if (*AnEXVAL < 0x1000000)
+ *am = M_DSPABS24;
+ else
+ return error("address must be smaller than $1000000");
+
+ return OK;
+ }
+ else
+ {
+ // Well, we have no opinion on the expression's size, so let's assume the worst
+ *areg = DSP_EA_ABS;
+ *am = M_DSPABS24;
+ return OK;
+ }
+ }
+
+ return error("internal assembler error: Please report this error message: 'reached the end of dsp_parmode' with the line of code that caused it. Thanks, and sorry for the inconvenience"); // Something bad happened
+}
- return error("internal assembler error: Please report this error message: 'reached the end of dsp_amode' with the line of code that caused it. Thanks, and sorry for the inconvenience"); //Something bad happened
+//
+// Parse all addressing modes except parallel moves
+//
+int dsp_amode(int maxea)
+{
+ LONG dummy;
+ // Initialize global return values
+ nmodes = dsp_a0reg = dsp_a1reg = 0;
+ dsp_am0 = dsp_am1 = M_AM_NONE;
+ dsp_a0expr[0] = dsp_a1expr[0] = ENDEXPR;
+ dsp_a0exval = 0;
+ dsp_a1exval = 0;
+ dsp_a0exattr = dsp_a1exattr = 0;
+ dsp_a0esym = dsp_a1esym = (SYM *)NULL;
+ dsp_a0memspace = dsp_a1memspace = -1;
+ dsp_a0perspace = dsp_a1perspace = -1;
+ dsp_k = 0;
+
+ // If at EOL, then no addr modes at all
+ if (*tok == EOL)
+ return 0;
+
+ if (dsp_parmode(&dsp_am0, &dsp_a0reg, dsp_a0expr, &dsp_a0exval, &dsp_a0exattr, &dsp_a0esym, &dsp_a0memspace, &dsp_a0perspace, 0) == ERROR)
+ return ERROR;
+
+
+ // 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 (*tok != ',')
+ {
+ if (dsp_k != 0)
+ return error("-x0/-x1/-y0/-y1 only allowed in multiply operations");
+
+ return 1;
+ }
+
+ // Eat the comma
+ tok++;
+
+ // Parse second addressing mode
+ if (dsp_parmode(&dsp_am1, &dsp_a1reg, dsp_a1expr, &dsp_a1exval, &dsp_a1exattr, &dsp_a1esym, &dsp_a1memspace, &dsp_a1perspace, 1) == ERROR)
+ return ERROR;
+
+ if (maxea == 2 || *tok == EOL)
+ {
+ if (dsp_k != 0)
+ return error("-x0/-x1/-y0/-y1 only allowed in multiply operations");
+
+ nmodes = 2;
+ return 2;
+ }
+
+ if (*tok == ',')
+ {
+ // Only MAC-like or jsset/clr/tst/chg instructions here
+ tok++;
+ if (dsp_parmode(&dsp_am2, &dsp_a2reg, dsp_a2expr, &dsp_a2exval, &dsp_a2exattr, &dsp_a2esym, &dummy, &dummy, 2) == ERROR)
+ return ERROR;
+ if (maxea == 3)
+ return 3;
+ if (*tok != EOL)
+ return error(extra_stuff);
+ nmodes = 3;
+ return 3;
+
+ }
+
+ // Only Tcc instructions here, and then only those that accept 4 operands
+
+ if (dsp_parmode(&dsp_am2, &dsp_a2reg, dsp_a2expr, &dsp_a2exval, &dsp_a2exattr, &dsp_a2esym, &dummy, &dummy, 2) == ERROR)
+ return ERROR;
+
+ if (*tok++ != ',')
+ return error("expected 4 parameters");
+
+ if (dsp_parmode(&dsp_am3, &dsp_a3reg, dsp_a3expr, &dsp_a3exval, &dsp_a3exattr, &dsp_a3esym, &dummy, &dummy, 3) == ERROR)
+ return ERROR;
+
+ if (*tok == EOL)
+ {
+ if (dsp_k != 0)
+ return error("-x0/-x1/-y0/-y1 only allowed in multiply operations");
+
+ nmodes = 4;
+ return 4;
+ }
+ else
+ {
+ // Tcc instructions do not support parallel moves, so any remaining tokens are garbage
+ return error(extra_stuff);
+ }
+
+ return error("internal assembler error: Please report this error message: 'reached the end of dsp_amode' with the line of code that caused it. Thanks, and sorry for the inconvenience"); //Something bad happened
}
//
static inline int SDreg(int reg)
{
- if (reg >= KW_X0 && reg <= KW_N7)
- return reg & 0xff;
- else if (reg >= KW_A0&® <= KW_A2)
- return (8 >> (reg & 7)) | 8;
- else //if (reg>=KW_R0&®<=KW_R7)
- return reg - KW_R0 + 16;
- // Handy map for the above:
- // (values are of course taken from keytab)
- // Register | Value | Return value
- // x0 | 260 | 4
- // x1 | 261 | 5
- // y0 | 262 | 6
- // y1 | 263 | 7
- // b0 | 265 | 8
- // b2 | 267 | 9
- // b1 | 269 | 10
- // a | 270 | 14
- // b | 271 | 15
- // n0 | 280 | 24
- // n1 | 281 | 25
- // n2 | 282 | 26
- // n3 | 283 | 27
- // n4 | 284 | 28
- // n5 | 285 | 29
- // n6 | 286 | 30
- // n7 | 287 | 31
- // a0 | 136 | 0
- // a1 | 137 | 1
- // a2 | 138 | 2
- // r0 | 151 | 16
- // r1 | 152 | 17
- // r2 | 153 | 18
- // r3 | 154 | 19
- // r4 | 155 | 20
- // r5 | 156 | 21
- // r6 | 157 | 22
- // r7 | 158 | 23
+ if (reg >= KW_X0 && reg <= KW_N7)
+ return reg & 0xFF;
+ else if (reg >= KW_A0&® <= KW_A2)
+ return (8 >> (reg & 7)) | 8;
+ else //if (reg>=KW_R0&®<=KW_R7)
+ return reg - KW_R0 + 16;
+ // Handy map for the above:
+ // (values are of course taken from keytab)
+ // Register | Value | Return value
+ // x0 | 260 | 4
+ // x1 | 261 | 5
+ // y0 | 262 | 6
+ // y1 | 263 | 7
+ // b0 | 265 | 8
+ // b2 | 267 | 9
+ // b1 | 269 | 10
+ // a | 270 | 14
+ // b | 271 | 15
+ // n0 | 280 | 24
+ // n1 | 281 | 25
+ // n2 | 282 | 26
+ // n3 | 283 | 27
+ // n4 | 284 | 28
+ // n5 | 285 | 29
+ // n6 | 286 | 30
+ // n7 | 287 | 31
+ // a0 | 136 | 0
+ // a1 | 137 | 1
+ // a2 | 138 | 2
+ // r0 | 151 | 16
+ // r1 | 152 | 17
+ // r2 | 153 | 18
+ // r3 | 154 | 19
+ // r4 | 155 | 20
+ // r5 | 156 | 21
+ // r6 | 157 | 22
+ // r7 | 158 | 23
}
//
static inline LONG check_x_y(LONG ea1, LONG S1)
{
- LONG inst;
- LONG eax_temp, eay_temp;
- LONG D1, D2, S2, ea2;
- LONG K_D1, K_D2;
- LONG w = 1 << 7; // S1=0, D1=1<<14
- if ((ea1 & 0x38) == DSP_EA_POSTINC || (ea1 & 0x38) == DSP_EA_POSTINC1 ||
- (ea1 & 0x38) == DSP_EA_POSTDEC1 || (ea1 & 0x38) == DSP_EA_NOUPD)
- {
-
- switch (ea1 & 0x38)
- {
- case DSP_EA_POSTINC: ea1 = (ea1&(~0x38)) | 0x8;break;
- case DSP_EA_POSTINC1: ea1 = (ea1&(~0x38)) | 0x18;break;
- case DSP_EA_POSTDEC1: ea1 = (ea1&(~0x38)) | 0x10;break;
- case DSP_EA_NOUPD: ea1 = (ea1&(~0x38)) | 0x00;break;
- }
+ LONG inst;
+ LONG eax_temp, eay_temp;
+ LONG D1, D2, S2, ea2;
+ LONG K_D1, K_D2;
+ LONG w = 1 << 7; // S1=0, D1=1<<14
+
+ if ((ea1 & 0x38) == DSP_EA_POSTINC || (ea1 & 0x38) == DSP_EA_POSTINC1 ||
+ (ea1 & 0x38) == DSP_EA_POSTDEC1 || (ea1 & 0x38) == DSP_EA_NOUPD)
+ {
+ switch (ea1 & 0x38)
+ {
+ case DSP_EA_POSTINC: ea1 = (ea1 & (~0x38)) | 0x8; break;
+ case DSP_EA_POSTINC1: ea1 = (ea1 & (~0x38)) | 0x18; break;
+ case DSP_EA_POSTDEC1: ea1 = (ea1 & (~0x38)) | 0x10; break;
+ case DSP_EA_NOUPD: ea1 = (ea1 & (~0x38)) | 0x00; break;
+ }
- if (S1 == 0)
- {
- // 'X:eax,D1 Y:eay,D2', 'X:eax,D1 S2,Y:eay'
- // Check for D1
- switch (K_D1 = *tok++)
- {
- case KW_X0: D1 = 0 << 10; break;
- case KW_X1: D1 = 1 << 10; break;
- case KW_A: D1 = 2 << 10; break;
- case KW_B: D1 = 3 << 10; break;
- default: return error("unrecognised X:Y: parallel move syntax: expected x0, x1, a or b after 'X:eax,'");
- }
- }
- else
- {
- // 'S1,X:eax Y:eay,D2' 'S1,X:eax S2,Y:eay'
- w = 0;
- switch (S1)
- {
- case 4: D1 = 0 << 10; break;
- case 5: D1 = 1 << 10; break;
- case 14: D1 = 2 << 10; break;
- case 15: D1 = 3 << 10; break;
- default: return error("unrecognised X:Y: parallel move syntax: S1 can only be x0, x1, a or b in 'S1,X:eax'");
- }
- }
+ if (S1 == 0)
+ {
+ // 'X:eax,D1 Y:eay,D2', 'X:eax,D1 S2,Y:eay'
+ // Check for D1
+ switch (K_D1 = *tok++)
+ {
+ case KW_X0: D1 = 0 << 10; break;
+ case KW_X1: D1 = 1 << 10; break;
+ case KW_A: D1 = 2 << 10; break;
+ case KW_B: D1 = 3 << 10; break;
+ default: return error("unrecognised X:Y: parallel move syntax: expected x0, x1, a or b after 'X:eax,'");
+ }
+ }
+ else
+ {
+ // 'S1,X:eax Y:eay,D2' 'S1,X:eax S2,Y:eay'
+ w = 0;
- if (*tok == KW_Y)
- {
- tok++;
- // 'X:eax,D1 Y:eay,D2' 'S1,X:eax Y:eay,D2'
- if (*tok++ != ':')
- return error("unrecognised X:Y: parallel move syntax: expected ':' after 'X:ea,D1/S1,X:ea Y'");
- if (*tok++ == '(')
- {
- if (*tok >= KW_R0 && *tok <= KW_R7)
- {
- ea2 = (*tok++ - KW_R0);
- if (((ea1 & 7) < 4 && ea2 < 4) || ((ea1 & 7) >= 4 && ea2 > 4))
- return error("unrecognised X:Y: parallel move syntax: eax and eay register banks must be different in 'X:ea,D1/S1,X:ea Y:eay,D2'");
- }
- else
- return error("unrecognised X:Y: parallel move syntax: expected 'Rn' after 'X:ea,D1/S1,X:ea Y:('");
- // If eax register is r0-r3 then eay register is r4-r7.
- // Encode that to 2 bits (i.e. eay value is 0-3)
- eax_temp = (ea2 & 3) << 5; // Store register temporarily
- if (*tok++ != ')')
- return error("unrecognised X:Y: parallel move syntax: expected ')' after 'X:ea,D1/S1,X:ea Y:(Rn'");
- if (*tok == '+')
- {
- tok++;
- if (*tok == ',')
- {
- // (Rn)+
- ea2 = 3 << 12;
- tok++;
- }
- else if (*tok >= KW_N0 && *tok <= KW_N7)
- {
- // (Rn)+Nn
- if ((*tok++ & 7) != ea2)
- return error("unrecognised X:Y: parallel move syntax(Same register number expected for Rn, Nn in 'X:ea,D1/S1,X:ea Y:(Rn)+Nn,D')");
- ea2 = 1 << 12;
- if (*tok++ != ',')
- return error("unrecognised X:Y: parallel move syntax: expected ',' after 'X:ea,D1/S1,X:ea Y:(Rn)+Nn'");
- }
- else
- return error("unrecognised X:Y: parallel move syntax: expected ',' or 'Nn' after 'X:ea,D1/S1,X:ea Y:(Rn)+'");
+ switch (S1)
+ {
+ case 4: D1 = 0 << 10; break;
+ case 5: D1 = 1 << 10; break;
+ case 14: D1 = 2 << 10; break;
+ case 15: D1 = 3 << 10; break;
+ default: return error("unrecognised X:Y: parallel move syntax: S1 can only be x0, x1, a or b in 'S1,X:eax'");
+ }
+ }
- }
- else if (*tok == '-')
- {
- // (Rn)-
- ea2 = 2 << 12;
- tok++;
- if (*tok++ != ',')
- return error("unrecognised X:Y: parallel move syntax: expected ',' after 'X:ea,D1/S1,X:ea Y:(Rn)-'");
- }
- else if (*tok++ == ',')
- {
- // (Rn)
- ea2 = 0 << 12;
- }
- else
- return error("unrecognised X:Y: parallel move syntax: expected ',' after 'X:ea,D1/S1,X:ea Y:eay'");
+ if (*tok == KW_Y)
+ {
+ tok++;
+ // 'X:eax,D1 Y:eay,D2' 'S1,X:eax Y:eay,D2'
+ if (*tok++ != ':')
+ return error("unrecognised X:Y: parallel move syntax: expected ':' after 'X:ea,D1/S1,X:ea Y'");
- ea2 |= eax_temp; // OR eay back from temp
+ if (*tok++ == '(')
+ {
+ if (*tok >= KW_R0 && *tok <= KW_R7)
+ {
+ ea2 = (*tok++ - KW_R0);
- switch (K_D2 = *tok++)
- {
- case KW_Y0: D2 = 0 << 8; break;
- case KW_Y1: D2 = 1 << 8; break;
- case KW_A: D2 = 2 << 8; break;
- case KW_B: D2 = 3 << 8; break;
- default: return error("unrecognised X:Y: parallel move syntax: expected y0, y1, a or b after 'X:ea,D1/S1,X:ea Y:eay,'");
- }
+ if (((ea1 & 7) < 4 && ea2 < 4) || ((ea1 & 7) >= 4 && ea2 > 4))
+ return error("unrecognised X:Y: parallel move syntax: eax and eay register banks must be different in 'X:ea,D1/S1,X:ea Y:eay,D2'");
+ }
+ else
+ return error("unrecognised X:Y: parallel move syntax: expected 'Rn' after 'X:ea,D1/S1,X:ea Y:('");
- if (*tok != EOL)
- return error("unrecognised X:Y: parallel move syntax: expected end-of-line after 'X:ea,D1/S1,X:ea Y:eay,D'");
+ // If eax register is r0-r3 then eay register is r4-r7.
+ // Encode that to 2 bits (i.e. eay value is 0-3)
+ eax_temp = (ea2 & 3) << 5; // Store register temporarily
- if (S1 == 0)
- if (K_D1 == K_D2)
- return error("unrecognised X:Y: parallel move syntax: D1 and D2 cannot be the same in 'X:ea,D1 Y:eay,D2'");
+ if (*tok++ != ')')
+ return error("unrecognised X:Y: parallel move syntax: expected ')' after 'X:ea,D1/S1,X:ea Y:(Rn'");
- inst = B16(11000000, 00000000) | w;
- inst |= ea1 | D1 | ea2 | D2;
- return inst;
- }
- else
- return error("unrecognised X:Y: parallel move syntax: expected '(Rn)', '(Rn)+', '(Rn)-', '(Rn)+Nn' after 'X:ea,D1/S1,X:ea Y:'");
- }
- else if (*tok == KW_Y0 || *tok == KW_Y1 || *tok == KW_A || *tok == KW_B)
- {
- // 'X:eax,D1 S2,Y:eay' 'S1,X:eax1 S2,Y:eay'
- switch (*tok++)
- {
- case KW_Y0: S2 = 0 << 8; break;
- case KW_Y1: S2 = 1 << 8; break;
- case KW_A: S2 = 2 << 8; break;
- case KW_B: S2 = 3 << 8; break;
- default: return error("unrecognised X:Y: parallel move syntax: expected y0, y1, a or b after 'X:ea,D1/S1,X:ea Y:eay,'");
- }
+ if (*tok == '+')
+ {
+ tok++;
- if (*tok++ != ',')
- return error("unrecognised X:Y: parallel move syntax: expected ',' after 'X:ea,D1/S1,X:ea S2'");
+ if (*tok == ',')
+ {
+ // (Rn)+
+ ea2 = 3 << 12;
+ tok++;
+ }
+ else if (*tok >= KW_N0 && *tok <= KW_N7)
+ {
+ // (Rn)+Nn
+ if ((*tok++ & 7) != ea2)
+ return error("unrecognised X:Y: parallel move syntax(Same register number expected for Rn, Nn in 'X:ea,D1/S1,X:ea Y:(Rn)+Nn,D')");
- if (*tok++ == KW_Y)
- {
- // 'X:eax,D1 Y:eay,D2' 'S1,X:eax Y:eay,D2'
- if (*tok++ != ':')
- return error("unrecognised X:Y: parallel move syntax: expected ':' after 'X:ea,D1/S1,X:ea Y'");
- if (*tok++ == '(')
- {
- if (*tok >= KW_R0 && *tok <= KW_R7)
- {
- ea2 = (*tok++ - KW_R0);
- if (((ea1 & 7) < 4 && ea2 < 4) || ((ea1 & 7) >= 4 && ea2 > 4))
- return error("unrecognised X:Y: parallel move syntax: eax and eay register banks must be different in 'X:ea,D1/S1,X:ea S2,Y:eay'");
- }
- else
- return error("unrecognised X:Y: parallel move syntax: expected 'Rn' after 'X:ea,D1/S1,X:ea S2,Y:('");
- // If eax register is r0-r3 then eay register is r4-r7.
- // Encode that to 2 bits (i.e. eay value is 0-3)
- eay_temp = (ea2 & 3) << 5; //Store register temporarily
- if (*tok++ != ')')
- return error("unrecognised X:Y: parallel move syntax: expected ')' after 'X:ea,D1/S1,X:ea S2,Y:(Rn'");
- if (*tok == '+')
- {
- tok++;
- if (*tok == EOL)
- // (Rn)+
- ea2 = 3 << 12;
- else if (*tok >= KW_N0 && *tok <= KW_N7)
- {
- // (Rn)+Nn
- if ((*tok++ & 7) != ea2)
- return error("unrecognised X:Y: parallel move syntax(Same register number expected for Rn, Nn in 'X:ea,D1/S1,X:ea S2,Y:(Rn)+Nn')");
- ea2 = 1 << 12;
- if (*tok != EOL)
- return error("unrecognised X:Y: parallel move syntax: expected end-of-line after 'X:ea,D1/S1,X:ea S2,Y:(Rn)+Nn'");
- }
- else
- return error("unrecognised X:Y: parallel move syntax: expected ',' or 'Nn' after 'X:ea,D1/S1,X:ea S2,Y:(Rn)+'");
+ ea2 = 1 << 12;
- }
- else if (*tok == '-')
- {
- // (Rn)-
- ea2 = 2 << 12;
- tok++;
- if (*tok != EOL)
- return error("unrecognised X:Y: parallel move syntax: expected end-of-line after 'X:ea,D1/S1,X:ea S2,Y:(Rn)-'");
- }
- else if (*tok == EOL)
- {
- // (Rn)
- ea2 = 0 << 12;
- }
- else
- return error("unrecognised X:Y: parallel move syntax: expected end-of-line after 'X:ea,D1/S1,X:ea S2,Y:eay'");
+ if (*tok++ != ',')
+ return error("unrecognised X:Y: parallel move syntax: expected ',' after 'X:ea,D1/S1,X:ea Y:(Rn)+Nn'");
+ }
+ else
+ return error("unrecognised X:Y: parallel move syntax: expected ',' or 'Nn' after 'X:ea,D1/S1,X:ea Y:(Rn)+'");
- ea2 |= eay_temp; //OR eay back from temp
+ }
+ else if (*tok == '-')
+ {
+ // (Rn)-
+ ea2 = 2 << 12;
+ tok++;
- inst = B16(10000000, 00000000) | w;
- inst |= (ea1 & 0x1f) | D1 | S2 | ea2;
- return inst;
- }
- else
- return error("unrecognised X:Y: parallel move syntax: expected '(Rn)', '(Rn)+', '(Rn)-', '(Rn)+Nn' after 'X:ea,D1/S1,X:ea Y:'");
+ if (*tok++ != ',')
+ return error("unrecognised X:Y: parallel move syntax: expected ',' after 'X:ea,D1/S1,X:ea Y:(Rn)-'");
+ }
+ else if (*tok++ == ',')
+ {
+ // (Rn)
+ ea2 = 0 << 12;
+ }
+ else
+ return error("unrecognised X:Y: parallel move syntax: expected ',' after 'X:ea,D1/S1,X:ea Y:eay'");
- }
- else
- return error("unrecognised X:Y: parallel move syntax: expected '(Rn)', '(Rn)+', '(Rn)-', '(Rn)+Nn' in 'X:ea,D1/S1,X:ea'");
- }
- else
- return error("unrecognised X:Y: or X:R parallel move syntax: expected Y:, A or B after 'X:ea,D1/S1,X:ea S2,'");
+ ea2 |= eax_temp; // OR eay back from temp
+ switch (K_D2 = *tok++)
+ {
+ case KW_Y0: D2 = 0 << 8; break;
+ case KW_Y1: D2 = 1 << 8; break;
+ case KW_A: D2 = 2 << 8; break;
+ case KW_B: D2 = 3 << 8; break;
+ default: return error("unrecognised X:Y: parallel move syntax: expected y0, y1, a or b after 'X:ea,D1/S1,X:ea Y:eay,'");
+ }
- }
- return error("unrecognised X:Y: parallel move syntax: expected '(Rn)', '(Rn)+', '(Rn)-', '(Rn)+Nn' in 'X:ea,D1/S1,X:ea'");
-}
+ if (*tok != EOL)
+ return error("unrecognised X:Y: parallel move syntax: expected end-of-line after 'X:ea,D1/S1,X:ea Y:eay,D'");
-//
-// Parse X: addressing space parallel moves
-//
-static inline LONG parse_x(const int W, LONG inst, const LONG S1, const int check_for_x_y)
-{
- int immreg; // Immediate register destination
- LONG S2, D1, D2; // Source and Destinations
- LONG ea1; // ea bitfields
- uint32_t termchar = ','; // Termination character for ea checks
- int force_imm = NUM_NORMAL; // Holds forced immediate value (i.e. '<' or '>')
- ea1 = -1; // initialise e1 (useful for some code paths)
- if (W == 0)
- termchar = EOL;
- if (*tok == '-')
- {
- if (tok[1] == CONST || tok[1] == FCONST)
- {
- tok++;
- dspImmedEXVAL = *tok++;
- goto x_check_immed;
- }
- // This could be either -(Rn), -aa or -ea. Check for immediate first
- if (tok[1] == SYMBOL)
- {
- if (expr(dspImmedEXPR, &dspImmedEXVAL, &dspImmedEXATTR, &dspImmedESYM) == OK)
- {
- if (S1 != 0)
- {
- x_checkea_right:
+ if (S1 == 0)
+ if (K_D1 == K_D2)
+ return error("unrecognised X:Y: parallel move syntax: D1 and D2 cannot be the same in 'X:ea,D1 Y:eay,D2'");
- // 'S1,X:ea S2,D2', 'A,X:ea X0,A', 'B,X:ea X0,B', 'S1,X:eax Y:eay,D2', 'S1,X:eax S2,Y:eay'
- if (*tok == KW_X0 && tok[1] == ',' && tok[2] == KW_A)
- {
- // 'A,X:ea X0,A'
- if (ea1 == DSP_EA_ABS)
- deposit_extra_ea = DEPOSIT_EXTRA_WORD;
- if (S1 != 14)
- return error("unrecognised X:R parallel move syntax: S1 can only be a in 'a,X:ea x0,a'");
- if (ea1 == -1)
- return error("unrecognised X:R parallel move syntax: absolute address not allowed in 'a,X:ea x0,a'");
- if (ea1 == B8(00110100))
- return error("unrecognised X:R parallel move syntax: immediate data not allowed in 'a,X:ea x0,a'");
- inst = B16(00001000, 00000000) | ea1 | (0 << 8);
- return inst;
- }
- else if (*tok == KW_X0 && tok[1] == ',' && tok[2] == KW_B)
- {
- // 'B,X:ea X0,B'
- if (ea1 == DSP_EA_ABS)
- deposit_extra_ea = DEPOSIT_EXTRA_WORD;
- if (S1 != 15)
- return error("unrecognised X:R parallel move syntax: S1 can only be b in 'b,X:ea x0,b'");
- if (ea1 == -1)
- return error("unrecognised X:R parallel move syntax: absolute address not allowed in 'b,X:ea x0,b'");
- if (ea1 == B8(00110100))
- return error("unrecognised X:R parallel move syntax: immediate data not allowed in 'b,X:ea x0,b'");
- inst = B16(00001001, 00000000) | ea1 | (1 << 8);
- return inst;
- }
- else if (*tok == KW_A || *tok == KW_B)
- {
- // 'S1,X:ea S2,D2', 'S1,X:eax S2,Y:eay'
+ inst = B16(11000000, 00000000) | w;
+ inst |= ea1 | D1 | ea2 | D2;
+ return inst;
+ }
+ else
+ return error("unrecognised X:Y: parallel move syntax: expected '(Rn)', '(Rn)+', '(Rn)-', '(Rn)+Nn' after 'X:ea,D1/S1,X:ea Y:'");
+ }
+ else if (*tok == KW_Y0 || *tok == KW_Y1 || *tok == KW_A || *tok == KW_B)
+ {
+ // 'X:eax,D1 S2,Y:eay' 'S1,X:eax1 S2,Y:eay'
+ switch (*tok++)
+ {
+ case KW_Y0: S2 = 0 << 8; break;
+ case KW_Y1: S2 = 1 << 8; break;
+ case KW_A: S2 = 2 << 8; break;
+ case KW_B: S2 = 3 << 8; break;
+ default: return error("unrecognised X:Y: parallel move syntax: expected y0, y1, a or b after 'X:ea,D1/S1,X:ea Y:eay,'");
+ }
- switch (S1)
- {
- case 4: D1 = 0 << 10; break;
- case 5: D1 = 1 << 10; break;
- case 14: D1 = 2 << 10; break;
- case 15: D1 = 3 << 10; break;
- default: return error("unrecognised X:R parallel move syntax: S1 can only be x0, x1, a or b in 'S1,X:ea S2,D2'");
- }
+ if (*tok++ != ',')
+ return error("unrecognised X:Y: parallel move syntax: expected ',' after 'X:ea,D1/S1,X:ea S2'");
- if (tok[1] == ',' && tok[2] == KW_Y)
- {
- // 'S1,X:eax S2,Y:eay'
- return check_x_y(ea1, S1);
- }
+ if (*tok++ == KW_Y)
+ {
+ // 'X:eax,D1 Y:eay,D2' 'S1,X:eax Y:eay,D2'
+ if (*tok++ != ':')
+ return error("unrecognised X:Y: parallel move syntax: expected ':' after 'X:ea,D1/S1,X:ea Y'");
- // 'S1,X:ea S2,D2'
- if (ea1 == DSP_EA_ABS)
- deposit_extra_ea = DEPOSIT_EXTRA_WORD;
+ if (*tok++ == '(')
+ {
+ if (*tok >= KW_R0 && *tok <= KW_R7)
+ {
+ ea2 = (*tok++ - KW_R0);
- switch (*tok++)
- {
- case KW_A: S2 = 0 << 9; break;
- case KW_B: S2 = 1 << 9; break;
- default: return error("unrecognised X:R parallel move syntax: expected a or b after 'S1,X:eax'");
- }
- if (*tok++ != ',')
- return error("unrecognised X:R parallel move syntax: expected ',' after 'S1,X:eax S2'");
+ if (((ea1 & 7) < 4 && ea2 < 4) || ((ea1 & 7) >= 4 && ea2 > 4))
+ return error("unrecognised X:Y: parallel move syntax: eax and eay register banks must be different in 'X:ea,D1/S1,X:ea S2,Y:eay'");
+ }
+ else
+ return error("unrecognised X:Y: parallel move syntax: expected 'Rn' after 'X:ea,D1/S1,X:ea S2,Y:('");
+ // If eax register is r0-r3 then eay register is r4-r7.
+ // Encode that to 2 bits (i.e. eay value is 0-3)
+ eay_temp = (ea2 & 3) << 5; //Store register temporarily
- if (*tok == KW_Y0 || *tok == KW_Y1)
- {
- if (*tok++ == KW_Y0)
- D2 = 0 << 8;
- else
- D2 = 1 << 8;
+ if (*tok++ != ')')
+ return error("unrecognised X:Y: parallel move syntax: expected ')' after 'X:ea,D1/S1,X:ea S2,Y:(Rn'");
- if (*tok != EOL)
- return error("unrecognised X:R parallel move syntax: unexpected text after 'X:eax,D1 S2,S2'");
+ if (*tok == '+')
+ {
+ tok++;
- inst = B16(00010000, 00000000) | (0 << 7);
- inst |= ea1 | D1 | S2 | D2;
- return inst;
- }
- else
- return error("unrecognised X:R parallel move syntax: expected y0 or y1 after 'X:eax,D1 S2,'");
+ if (*tok == EOL)
+ // (Rn)+
+ ea2 = 3 << 12;
+ else if (*tok >= KW_N0 && *tok <= KW_N7)
+ {
+ // (Rn)+Nn
+ if ((*tok++ & 7) != ea2)
+ return error("unrecognised X:Y: parallel move syntax(Same register number expected for Rn, Nn in 'X:ea,D1/S1,X:ea S2,Y:(Rn)+Nn')");
- }
- else if (*tok == KW_Y)
- {
- // 'S1,X:eax Y:eay,D2'
- return check_x_y(ea1, S1);
- }
- else if (*tok == KW_Y0 || *tok == KW_Y1)
- {
- // 'S1,X:eax S2,Y:eay'
- return check_x_y(ea1, S1);
- }
- else
- return error("unrecognised X:Y or X:R parallel move syntax: expected y0 or y1 after 'X:eax,D1/X:ea,D1");
- }
- else
- {
- // Only check for aa if we have a defined number in our hands or we've
- // been asked to use a short number format. The former case we'll just test
- // it to see if it's small enough. The later - it's the programmer's call
- // so he'd better have a small address or the fixups will bite him/her in the arse!
- if (dspImmedEXATTR&DEFINED || force_imm == NUM_FORCE_SHORT)
- {
+ ea2 = 1 << 12;
- // It's an immediate, so ea or eax is probably an absolute address
- // (unless it's aa if the immediate is small enough)
- // 'X:ea,D' or 'X:aa,D' or 'X:ea,D1 S2,D2' or 'X:eax,D1 Y:eay,D2' or 'X:eax,D1 S2,Y:eay'
- x_check_immed:
- // Check for aa (which is 6 bits zero extended)
- if (dspImmedEXVAL < 0x40 && force_imm != NUM_FORCE_LONG)
- {
- if (W == 1)
- {
- // It might be X:aa but we're not 100% sure yet.
- // If it is, the only possible syntax here is 'X:aa,D'.
- // So check ahead to see if EOL follows D, then we're good to go.
- if (*tok == ',' && ((*(tok + 1) >= KW_X0 && *(tok + 1) <= KW_N7) || (*(tok + 1) >= KW_R0 && *(tok + 1) <= KW_R7) || (*(tok + 1) >= KW_A0 && *(tok + 1) <= KW_A2)) && *(tok + 2) == EOL)
- {
- // Yup, we're good to go - 'X:aa,D' it is
- tok++;
- immreg = SDreg(*tok++);
- inst = inst | (uint32_t)dspImmedEXVAL;
- inst |= ((immreg & 0x18) << (12 - 3)) + ((immreg & 7) << 8);
- inst |= 1 << 7; // W
- return inst;
- }
- }
- else
- {
- if (*tok == EOL)
- {
- // 'S,X:aa'
- inst = inst | (uint32_t)dspImmedEXVAL;
- inst |= ((S1 & 0x18) << (12 - 3)) + ((S1 & 7) << 8);
- return inst;
- }
- else
- {
- // 'S1,X:ea S2,D2', 'A,X:ea X0,A', 'B,X:ea X0,B',
- // 'S1,X:eax Y:eay,D2', 'S1,X:eax S2,Y:eay'
- ea1 = DSP_EA_ABS;
- deposit_extra_ea = DEPOSIT_EXTRA_WORD;
- goto x_checkea_right;
- }
- }
- }
- }
+ if (*tok != EOL)
+ return error("unrecognised X:Y: parallel move syntax: expected end-of-line after 'X:ea,D1/S1,X:ea S2,Y:(Rn)+Nn'");
+ }
+ else
+ return error("unrecognised X:Y: parallel move syntax: expected ',' or 'Nn' after 'X:ea,D1/S1,X:ea S2,Y:(Rn)+'");
- // Well, that settles it - we do have an ea in our hands
- if (W == 1)
- {
- // 'X:ea,D' [... S2,d2]
- if (*tok++ != ',')
- return error("unrecognised X: parallel move syntax: expected ',' after 'X:ea'");
- if ((*tok >= KW_X0 && *tok <= KW_N7) || (*tok >= KW_R0 && *tok <= KW_R7) || (*tok >= KW_A0 && *tok <= KW_A2))
- {
- D1 = SDreg(*tok++);
- if (*tok == EOL)
- {
- // 'X:ea,D'
- inst = inst | B8(01000000) | (1 << 7);
- inst |= ((D1 & 0x18) << (12 - 3)) + ((D1 & 7) << 8);
- inst |= ea1;
- if (ea1 == DSP_EA_ABS)
- deposit_extra_ea = DEPOSIT_EXTRA_WORD;
- return inst;
- }
- else
- {
- // 'X:ea,D1 S2,D2'
- if (*tok == KW_A || *tok == KW_B)
- {
- S2 = SDreg(*tok++);
- if (*tok++ != ',')
- return error("unrecognised X:R parallel move syntax: expected comma after X:ea,D1 S2");
- if (*tok == KW_Y0 || *tok == KW_Y1)
- {
- D2 = SDreg(*tok++);
- if (*tok != EOL)
- return error("unrecognised X:R parallel move syntax: expected EOL after X:ea,D1 S2,D2");
- inst = B16(00010000, 00000000) | (1 << 7);
- inst |= ((D1 & 0x8) << (12 - 4)) + ((D1 & 1) << 10);
- inst |= (S2 & 1) << 9;
- inst |= (D2 & 1) << 8;
- inst |= ea1;
- return inst;
- }
- else
- return error("unrecognised X:R parallel move syntax: expected y0,y1 after X:ea,D1 S2,");
- }
- else
- return error("unrecognised X:R parallel move syntax: expected a,b after X:ea,D1");
- }
- }
- else
- return error("unrecognised X: parallel move syntax: expected x0,x1,y0,y1,a0,b0,a2,b2,a1,b1,a,b,r0-r7,n0-n7 after 'X:ea,'");
- }
- else
- {
- if (*tok == EOL)
- {
- // 'S,X:ea'
- inst = inst | B8(01000000) | (0 << 7);
- inst |= ((S1 & 0x18) << (12 - 3)) + ((S1 & 7) << 8);
- inst |= ea1;
- if (ea1 == DSP_EA_ABS)
- deposit_extra_ea = DEPOSIT_EXTRA_WORD;
- return inst;
- }
- else
- {
- // 'S1,X:ea S2,D2', 'A,X:ea X0,A', 'B,X:ea X0,B',
- // 'S1,X:eax Y:eay,D2', 'S1,X:eax S2,Y:eay'
- goto x_checkea_right;
- }
- }
+ }
+ else if (*tok == '-')
+ {
+ // (Rn)-
+ ea2 = 2 << 12;
+ tok++;
+ if (*tok != EOL)
+ return error("unrecognised X:Y: parallel move syntax: expected end-of-line after 'X:ea,D1/S1,X:ea S2,Y:(Rn)-'");
+ }
+ else if (*tok == EOL)
+ {
+ // (Rn)
+ ea2 = 0 << 12;
+ }
+ else
+ return error("unrecognised X:Y: parallel move syntax: expected end-of-line after 'X:ea,D1/S1,X:ea S2,Y:eay'");
- }
- }
- }
- else
- {
- // It's not an immediate, check for '-(Rn)'
- ea1 = checkea(termchar, X_ERRORS);
+ ea2 |= eay_temp; //OR eay back from temp
- if (ea1 == ERROR)
- return ERROR;
+ inst = B16(10000000, 00000000) | w;
+ inst |= (ea1 & 0x1f) | D1 | S2 | ea2;
+ return inst;
+ }
+ else
+ return error("unrecognised X:Y: parallel move syntax: expected '(Rn)', '(Rn)+', '(Rn)-', '(Rn)+Nn' after 'X:ea,D1/S1,X:ea Y:'");
+ }
+ else
+ return error("unrecognised X:Y: parallel move syntax: expected '(Rn)', '(Rn)+', '(Rn)-', '(Rn)+Nn' in 'X:ea,D1/S1,X:ea'");
+ }
+ else
+ return error("unrecognised X:Y: or X:R parallel move syntax: expected Y:, A or B after 'X:ea,D1/S1,X:ea S2,'");
+ }
- goto x_gotea1;
+ return error("unrecognised X:Y: parallel move syntax: expected '(Rn)', '(Rn)+', '(Rn)-', '(Rn)+Nn' in 'X:ea,D1/S1,X:ea'");
+}
- }
- }
- else if (*tok == '#')
- {
- tok++;
- if (expr(dspImmedEXPR, &dspImmedEXVAL, &dspImmedEXATTR, &dspImmedESYM) != OK)
- return ERROR;
- // Okay so we have immediate data - mark it down
- ea1 = DSP_EA_IMM;
- // Now, proceed to the main code for this branch
- goto x_gotea1;
- }
- else if (*tok == '(')
- {
- // Maybe we got an expression here, check for it
- if (tok[1] == CONST || tok[1] == FCONST || tok[1] == SUNARY || tok[1] == SYMBOL || tok[1] == STRING)
- {
- // Evaluate the expression and go to immediate code path
- expr(dspImmedEXPR, &dspImmedEXVAL, &dspImmedEXATTR, &dspImmedESYM);
- goto x_check_immed;
- }
+//
+// Parse X: addressing space parallel moves
+//
+static inline LONG parse_x(const int W, LONG inst, const LONG S1, const int check_for_x_y)
+{
+ int immreg; // Immediate register destination
+ LONG S2, D1, D2; // Source and Destinations
+ LONG ea1; // ea bitfields
+ uint32_t termchar = ','; // Termination character for ea checks
+ int force_imm = NUM_NORMAL; // Holds forced immediate value (i.e. '<' or '>')
+ ea1 = -1; // initialise e1 (useful for some code paths)
+
+ if (W == 0)
+ termchar = EOL;
+
+ if (*tok == '-')
+ {
+ if (tok[1] == CONST || tok[1] == FCONST)
+ {
+ tok++;
+ dspImmedEXVAL = *tok++;
+ goto x_check_immed;
+ }
- // Nope, let's check for ea then
- ea1 = checkea(termchar, X_ERRORS);
- if (ea1 == ERROR)
- return ERROR;
+ // This could be either -(Rn), -aa or -ea. Check for immediate first
+ if (tok[1] == SYMBOL)
+ {
+ if (expr(dspImmedEXPR, &dspImmedEXVAL, &dspImmedEXATTR, &dspImmedESYM) == OK)
+ {
+ if (S1 != 0)
+ {
+x_checkea_right:
+ // 'S1,X:ea S2,D2', 'A,X:ea X0,A', 'B,X:ea X0,B', 'S1,X:eax Y:eay,D2', 'S1,X:eax S2,Y:eay'
+ if (*tok == KW_X0 && tok[1] == ',' && tok[2] == KW_A)
+ {
+ // 'A,X:ea X0,A'
+ if (ea1 == DSP_EA_ABS)
+ deposit_extra_ea = DEPOSIT_EXTRA_WORD;
- x_gotea1:
- if (W == 1)
- {
- if (*tok++ != ',')
- return error("Comma expected after 'X:(Rn)')");
+ if (S1 != 14)
+ return error("unrecognised X:R parallel move syntax: S1 can only be a in 'a,X:ea x0,a'");
- // It might be 'X:(Rn..)..,D' but we're not 100% sure yet.
- // If it is, the only possible syntax here is 'X:ea,D'.
- // So check ahead to see if EOL follows D, then we're good to go.
- if (((*tok >= KW_X0 && *tok <= KW_N7) || (*tok >= KW_R0 && *tok <= KW_R7) || (*tok >= KW_A0 && *tok <= KW_A2)) && *(tok + 1) == EOL)
- {
- //'X:ea,D'
- D1 = SDreg(*tok++);
+ if (ea1 == -1)
+ return error("unrecognised X:R parallel move syntax: absolute address not allowed in 'a,X:ea x0,a'");
- inst = inst | B8(01000000) | (1 << 7);
- inst |= ea1;
- inst |= ((D1 & 0x18) << (12 - 3)) + ((D1 & 7) << 8);
- return inst;
- }
- }
- else
- {
- if (*tok == EOL)
- {
- //'S,X:ea'
- inst = inst | B8(01000000) | (0 << 7);
- inst |= ea1;
- inst |= ((S1 & 0x18) << (12 - 3)) + ((S1 & 7) << 8);
- return inst;
- }
- else
- {
- goto x_checkea_right;
- }
- }
- // 'X:eax,D1 Y:eay,D2', 'X:eax,D1 S2,Y:eay' or 'X:ea,D1 S2,D2'
- // Check ahead for S2,D2 - if that's true then we have 'X:ea,D1 S2,D2'
- if ((*tok == KW_X0 || *tok == KW_X1 || *tok == KW_A || *tok == KW_B) && (*(tok + 1) == KW_A || *(tok + 1) == KW_B) && (*(tok + 2) == ',') && (*(tok + 3) == KW_Y0 || (*(tok + 3) == KW_Y1)))
- {
- // 'X:ea,D1 S2,D2'
- // Check if D1 is x0, x1, a or b
- switch (*tok++)
- {
- case KW_X0: D1 = 0 << 10; break;
- case KW_X1: D1 = 1 << 10; break;
- case KW_A: D1 = 2 << 10; break;
- case KW_B: D1 = 3 << 10; break;
- default: return error("unrecognised X:R parallel move syntax: expected x0, x1, a or b after 'X:eax,'");
- }
+ if (ea1 == B8(00110100))
+ return error("unrecognised X:R parallel move syntax: immediate data not allowed in 'a,X:ea x0,a'");
- switch (*tok++)
- {
- case KW_A: S2 = 0 << 9; break;
- case KW_B: S2 = 1 << 9; break;
- default: return error("unrecognised X:R parallel move syntax: expected a or b after 'X:eax,D1 '");
- }
+ inst = B16(00001000, 00000000) | ea1 | (0 << 8);
+ return inst;
+ }
+ else if (*tok == KW_X0 && tok[1] == ',' && tok[2] == KW_B)
+ {
+ // 'B,X:ea X0,B'
+ if (ea1 == DSP_EA_ABS)
+ deposit_extra_ea = DEPOSIT_EXTRA_WORD;
- if (*tok++ != ',')
- return error("unrecognised X:R parallel move syntax: expected ',' after 'X:eax,D1 S2'");
+ if (S1 != 15)
+ return error("unrecognised X:R parallel move syntax: S1 can only be b in 'b,X:ea x0,b'");
- if (*tok == KW_Y0 || *tok == KW_Y1)
- {
- if (*tok++ == KW_Y0)
- D2 = 0 << 8;
- else
- D2 = 1 << 8;
+ if (ea1 == -1)
+ return error("unrecognised X:R parallel move syntax: absolute address not allowed in 'b,X:ea x0,b'");
- if (*tok != EOL)
- return error("unrecognised X:R parallel move syntax: unexpected text after 'X:eax,D1 S2,S2'");
+ if (ea1 == B8(00110100))
+ return error("unrecognised X:R parallel move syntax: immediate data not allowed in 'b,X:ea x0,b'");
- inst = B16(00010000, 00000000) | (W << 7);
- inst |= ea1 | D1 | S2 | D2;
- return inst;
- }
- else
- return error("unrecognised X:R parallel move syntax: expected y0 or y1 after 'X:eax,D1 S2,'");
+ inst = B16(00001001, 00000000) | ea1 | (1 << 8);
+ return inst;
+ }
+ else if (*tok == KW_A || *tok == KW_B)
+ {
+ // 'S1,X:ea S2,D2', 'S1,X:eax S2,Y:eay'
+ switch (S1)
+ {
+ case 4: D1 = 0 << 10; break;
+ case 5: D1 = 1 << 10; break;
+ case 14: D1 = 2 << 10; break;
+ case 15: D1 = 3 << 10; break;
+ default: return error("unrecognised X:R parallel move syntax: S1 can only be x0, x1, a or b in 'S1,X:ea S2,D2'");
+ }
- }
+ if (tok[1] == ',' && tok[2] == KW_Y)
+ {
+ // 'S1,X:eax S2,Y:eay'
+ return check_x_y(ea1, S1);
+ }
- // Check to see if we got eax (which is a subset of ea)
- if (check_for_x_y)
- {
- if ((inst = check_x_y(ea1, 0)) != 0)
- return inst;
- else
- {
- // Rewind pointer as it might be an expression and check for it
- tok--;
- if (expr(dspaaEXPR, &dspaaEXVAL, &dspaaEXATTR, &dspaaESYM) != OK)
- return ERROR;
- // Yes, we have an expression, so we now check for
- // 'X:ea,D' or 'X:aa,D' or 'X:ea,D1 S2,D2' or 'X:eax,D1 Y:eay,D2' or 'X:eax,D1 S2,Y:eay'
- goto x_check_immed;
- }
- }
- }
- else if (*tok == CONST || *tok == FCONST || *tok == SYMBOL)
- {
- // Check for immediate address
- if (expr(dspImmedEXPR, &dspImmedEXVAL, &dspImmedEXATTR, &dspImmedESYM) != OK)
- return ERROR;
+ // 'S1,X:ea S2,D2'
+ if (ea1 == DSP_EA_ABS)
+ deposit_extra_ea = DEPOSIT_EXTRA_WORD;
- // We set ea1 here - if it's aa instead of ea
- // then it won't be used anyway
- ea1 = DSP_EA_ABS;
- if (!(dspImmedEXATTR&DEFINED))
- {
- force_imm = NUM_FORCE_LONG;
- deposit_extra_ea = DEPOSIT_EXTRA_WORD;
- }
+ switch (*tok++)
+ {
+ case KW_A: S2 = 0 << 9; break;
+ case KW_B: S2 = 1 << 9; break;
+ default: return error("unrecognised X:R parallel move syntax: expected a or b after 'S1,X:eax'");
+ }
- goto x_check_immed;
- }
- else if (*tok == '>')
- {
- // Check for immediate address forced long
- tok++;
- if (expr(dspImmedEXPR, &dspImmedEXVAL, &dspImmedEXATTR, &dspImmedESYM) != OK)
- return ERROR;
- if (dspImmedEXATTR & DEFINED)
- if (dspImmedEXVAL > 0xffffff)
- return error("long address is bigger than $ffffff");
+ if (*tok++ != ',')
+ return error("unrecognised X:R parallel move syntax: expected ',' after 'S1,X:eax S2'");
- deposit_extra_ea = DEPOSIT_EXTRA_WORD;
+ if (*tok == KW_Y0 || *tok == KW_Y1)
+ {
+ if (*tok++ == KW_Y0)
+ D2 = 0 << 8;
+ else
+ D2 = 1 << 8;
- force_imm = NUM_FORCE_LONG;
- ea1 = DSP_EA_ABS;
- goto x_check_immed;
- }
- else if (*tok == '<')
- {
- // Check for immediate address forced short
- tok++;
- if (expr(dspImmedEXPR, &dspImmedEXVAL, &dspImmedEXATTR, &dspImmedESYM) != OK)
- return ERROR;
- force_imm = NUM_FORCE_SHORT;
- if (dspImmedEXATTR & DEFINED)
- {
- if (dspImmedEXVAL > 0x3f)
- {
- warn("short addressing mode forced but address is bigger than $3f - switching to long");
- force_imm = NUM_FORCE_LONG;
- deposit_extra_ea = DEPOSIT_EXTRA_WORD;
- ea1 = DSP_EA_ABS;
- }
- }
- else
- {
- // This might end up as something like 'move Y:<adr,register'
- // so let's mark it as an extra aa fixup here.
- // Note: we are branching to x_check_immed without a
- // defined dspImmed so it's going to be 0. It probably
- // doesn't harm anything.
- deposit_extra_ea = DEPOSIT_EXTRA_FIXUP;
- }
+ if (*tok != EOL)
+ return error("unrecognised X:R parallel move syntax: unexpected text after 'X:eax,D1 S2,S2'");
- goto x_check_immed;
- }
- return error("unknown x: addressing mode");
+ inst = B16(00010000, 00000000) | (0 << 7);
+ inst |= ea1 | D1 | S2 | D2;
+ return inst;
+ }
+ else
+ return error("unrecognised X:R parallel move syntax: expected y0 or y1 after 'X:eax,D1 S2,'");
+ }
+ else if (*tok == KW_Y)
+ {
+ // 'S1,X:eax Y:eay,D2'
+ return check_x_y(ea1, S1);
+ }
+ else if (*tok == KW_Y0 || *tok == KW_Y1)
+ {
+ // 'S1,X:eax S2,Y:eay'
+ return check_x_y(ea1, S1);
+ }
+ else
+ return error("unrecognised X:Y or X:R parallel move syntax: expected y0 or y1 after 'X:eax,D1/X:ea,D1");
+ }
+ else
+ {
+ // Only check for aa if we have a defined number in our hands or we've
+ // been asked to use a short number format. The former case we'll just test
+ // it to see if it's small enough. The later - it's the programmer's call
+ // so he'd better have a small address or the fixups will bite him/her in the arse!
+ if (dspImmedEXATTR&DEFINED || force_imm == NUM_FORCE_SHORT)
+ {
+
+ // It's an immediate, so ea or eax is probably an absolute address
+ // (unless it's aa if the immediate is small enough)
+ // 'X:ea,D' or 'X:aa,D' or 'X:ea,D1 S2,D2' or 'X:eax,D1 Y:eay,D2' or 'X:eax,D1 S2,Y:eay'
+x_check_immed:
+ // Check for aa (which is 6 bits zero extended)
+ if (dspImmedEXVAL < 0x40 && force_imm != NUM_FORCE_LONG)
+ {
+ if (W == 1)
+ {
+ // It might be X:aa but we're not 100% sure yet.
+ // If it is, the only possible syntax here is 'X:aa,D'.
+ // So check ahead to see if EOL follows D, then we're good to go.
+ if (*tok == ',' && ((*(tok + 1) >= KW_X0 && *(tok + 1) <= KW_N7) || (*(tok + 1) >= KW_R0 && *(tok + 1) <= KW_R7) || (*(tok + 1) >= KW_A0 && *(tok + 1) <= KW_A2)) && *(tok + 2) == EOL)
+ {
+ // Yup, we're good to go - 'X:aa,D' it is
+ tok++;
+ immreg = SDreg(*tok++);
+ inst = inst | (uint32_t)dspImmedEXVAL;
+ inst |= ((immreg & 0x18) << (12 - 3)) + ((immreg & 7) << 8);
+ inst |= 1 << 7; // W
+ return inst;
+ }
+ }
+ else
+ {
+ if (*tok == EOL)
+ {
+ // 'S,X:aa'
+ inst = inst | (uint32_t)dspImmedEXVAL;
+ inst |= ((S1 & 0x18) << (12 - 3)) + ((S1 & 7) << 8);
+ return inst;
+ }
+ else
+ {
+ // 'S1,X:ea S2,D2', 'A,X:ea X0,A', 'B,X:ea X0,B',
+ // 'S1,X:eax Y:eay,D2', 'S1,X:eax S2,Y:eay'
+ ea1 = DSP_EA_ABS;
+ deposit_extra_ea = DEPOSIT_EXTRA_WORD;
+ goto x_checkea_right;
+ }
+ }
+ }
+ }
+
+ // Well, that settles it - we do have an ea in our hands
+ if (W == 1)
+ {
+ // 'X:ea,D' [... S2,d2]
+ if (*tok++ != ',')
+ return error("unrecognised X: parallel move syntax: expected ',' after 'X:ea'");
+
+ if ((*tok >= KW_X0 && *tok <= KW_N7) || (*tok >= KW_R0 && *tok <= KW_R7) || (*tok >= KW_A0 && *tok <= KW_A2))
+ {
+ D1 = SDreg(*tok++);
+
+ if (*tok == EOL)
+ {
+ // 'X:ea,D'
+ inst = inst | B8(01000000) | (1 << 7);
+ inst |= ((D1 & 0x18) << (12 - 3)) + ((D1 & 7) << 8);
+ inst |= ea1;
+
+ if (ea1 == DSP_EA_ABS)
+ deposit_extra_ea = DEPOSIT_EXTRA_WORD;
+
+ return inst;
+ }
+ else
+ {
+ // 'X:ea,D1 S2,D2'
+ if (*tok == KW_A || *tok == KW_B)
+ {
+ S2 = SDreg(*tok++);
+
+ if (*tok++ != ',')
+ return error("unrecognised X:R parallel move syntax: expected comma after X:ea,D1 S2");
+
+ if (*tok == KW_Y0 || *tok == KW_Y1)
+ {
+ D2 = SDreg(*tok++);
+
+ if (*tok != EOL)
+ return error("unrecognised X:R parallel move syntax: expected EOL after X:ea,D1 S2,D2");
+
+ inst = B16(00010000, 00000000) | (1 << 7);
+ inst |= ((D1 & 0x8) << (12 - 4)) + ((D1 & 1) << 10);
+ inst |= (S2 & 1) << 9;
+ inst |= (D2 & 1) << 8;
+ inst |= ea1;
+ return inst;
+ }
+ else
+ return error("unrecognised X:R parallel move syntax: expected y0,y1 after X:ea,D1 S2,");
+ }
+ else
+ return error("unrecognised X:R parallel move syntax: expected a,b after X:ea,D1");
+ }
+ }
+ else
+ return error("unrecognised X: parallel move syntax: expected x0,x1,y0,y1,a0,b0,a2,b2,a1,b1,a,b,r0-r7,n0-n7 after 'X:ea,'");
+ }
+ else
+ {
+ if (*tok == EOL)
+ {
+ // 'S,X:ea'
+ inst = inst | B8(01000000) | (0 << 7);
+ inst |= ((S1 & 0x18) << (12 - 3)) + ((S1 & 7) << 8);
+ inst |= ea1;
+
+ if (ea1 == DSP_EA_ABS)
+ deposit_extra_ea = DEPOSIT_EXTRA_WORD;
+
+ return inst;
+ }
+ else
+ {
+ // 'S1,X:ea S2,D2', 'A,X:ea X0,A', 'B,X:ea X0,B',
+ // 'S1,X:eax Y:eay,D2', 'S1,X:eax S2,Y:eay'
+ goto x_checkea_right;
+ }
+ }
+
+ }
+ }
+ }
+ else
+ {
+ // It's not an immediate, check for '-(Rn)'
+ ea1 = checkea(termchar, X_ERRORS);
+
+ if (ea1 == ERROR)
+ return ERROR;
+
+ goto x_gotea1;
+
+ }
+ }
+ else if (*tok == '#')
+ {
+ tok++;
+
+ if (expr(dspImmedEXPR, &dspImmedEXVAL, &dspImmedEXATTR, &dspImmedESYM) != OK)
+ return ERROR;
+
+ // Okay so we have immediate data - mark it down
+ ea1 = DSP_EA_IMM;
+ // Now, proceed to the main code for this branch
+ goto x_gotea1;
+ }
+ else if (*tok == '(')
+ {
+ // Maybe we got an expression here, check for it
+ if (tok[1] == CONST || tok[1] == FCONST || tok[1] == SUNARY || tok[1] == SYMBOL || tok[1] == STRING)
+ {
+ // Evaluate the expression and go to immediate code path
+ expr(dspImmedEXPR, &dspImmedEXVAL, &dspImmedEXATTR, &dspImmedESYM);
+ goto x_check_immed;
+ }
+
+ // Nope, let's check for ea then
+ ea1 = checkea(termchar, X_ERRORS);
+
+ if (ea1 == ERROR)
+ return ERROR;
+
+x_gotea1:
+ if (W == 1)
+ {
+ if (*tok++ != ',')
+ return error("Comma expected after 'X:(Rn)')");
+
+ // It might be 'X:(Rn..)..,D' but we're not 100% sure yet.
+ // If it is, the only possible syntax here is 'X:ea,D'.
+ // So check ahead to see if EOL follows D, then we're good to go.
+ if (((*tok >= KW_X0 && *tok <= KW_N7) || (*tok >= KW_R0 && *tok <= KW_R7) || (*tok >= KW_A0 && *tok <= KW_A2)) && *(tok + 1) == EOL)
+ {
+ //'X:ea,D'
+ D1 = SDreg(*tok++);
+
+ inst = inst | B8(01000000) | (1 << 7);
+ inst |= ea1;
+ inst |= ((D1 & 0x18) << (12 - 3)) + ((D1 & 7) << 8);
+ return inst;
+ }
+ }
+ else
+ {
+ if (*tok == EOL)
+ {
+ //'S,X:ea'
+ inst = inst | B8(01000000) | (0 << 7);
+ inst |= ea1;
+ inst |= ((S1 & 0x18) << (12 - 3)) + ((S1 & 7) << 8);
+ return inst;
+ }
+ else
+ {
+ goto x_checkea_right;
+ }
+ }
+
+ // 'X:eax,D1 Y:eay,D2', 'X:eax,D1 S2,Y:eay' or 'X:ea,D1 S2,D2'
+ // Check ahead for S2,D2 - if that's true then we have 'X:ea,D1 S2,D2'
+ if ((*tok == KW_X0 || *tok == KW_X1 || *tok == KW_A || *tok == KW_B) && (*(tok + 1) == KW_A || *(tok + 1) == KW_B) && (*(tok + 2) == ',') && (*(tok + 3) == KW_Y0 || (*(tok + 3) == KW_Y1)))
+ {
+ // 'X:ea,D1 S2,D2'
+ // Check if D1 is x0, x1, a or b
+ switch (*tok++)
+ {
+ case KW_X0: D1 = 0 << 10; break;
+ case KW_X1: D1 = 1 << 10; break;
+ case KW_A: D1 = 2 << 10; break;
+ case KW_B: D1 = 3 << 10; break;
+ default: return error("unrecognised X:R parallel move syntax: expected x0, x1, a or b after 'X:eax,'");
+ }
+
+ switch (*tok++)
+ {
+ case KW_A: S2 = 0 << 9; break;
+ case KW_B: S2 = 1 << 9; break;
+ default: return error("unrecognised X:R parallel move syntax: expected a or b after 'X:eax,D1 '");
+ }
+
+ if (*tok++ != ',')
+ return error("unrecognised X:R parallel move syntax: expected ',' after 'X:eax,D1 S2'");
+
+ if (*tok == KW_Y0 || *tok == KW_Y1)
+ {
+ if (*tok++ == KW_Y0)
+ D2 = 0 << 8;
+ else
+ D2 = 1 << 8;
+
+ if (*tok != EOL)
+ return error("unrecognised X:R parallel move syntax: unexpected text after 'X:eax,D1 S2,S2'");
+
+ inst = B16(00010000, 00000000) | (W << 7);
+ inst |= ea1 | D1 | S2 | D2;
+ return inst;
+ }
+ else
+ return error("unrecognised X:R parallel move syntax: expected y0 or y1 after 'X:eax,D1 S2,'");
+ }
+
+ // Check to see if we got eax (which is a subset of ea)
+ if (check_for_x_y)
+ {
+ if ((inst = check_x_y(ea1, 0)) != 0)
+ return inst;
+ else
+ {
+ // Rewind pointer as it might be an expression and check for it
+ tok--;
+
+ if (expr(dspaaEXPR, &dspaaEXVAL, &dspaaEXATTR, &dspaaESYM) != OK)
+ return ERROR;
+
+ // Yes, we have an expression, so we now check for
+ // 'X:ea,D' or 'X:aa,D' or 'X:ea,D1 S2,D2' or 'X:eax,D1 Y:eay,D2' or 'X:eax,D1 S2,Y:eay'
+ goto x_check_immed;
+ }
+ }
+ }
+ else if (*tok == CONST || *tok == FCONST || *tok == SYMBOL)
+ {
+ // Check for immediate address
+ if (expr(dspImmedEXPR, &dspImmedEXVAL, &dspImmedEXATTR, &dspImmedESYM) != OK)
+ return ERROR;
+
+ // We set ea1 here - if it's aa instead of ea
+ // then it won't be used anyway
+ ea1 = DSP_EA_ABS;
+
+ if (!(dspImmedEXATTR&DEFINED))
+ {
+ force_imm = NUM_FORCE_LONG;
+ deposit_extra_ea = DEPOSIT_EXTRA_WORD;
+ }
+
+ goto x_check_immed;
+ }
+ else if (*tok == '>')
+ {
+ // Check for immediate address forced long
+ tok++;
+
+ if (expr(dspImmedEXPR, &dspImmedEXVAL, &dspImmedEXATTR, &dspImmedESYM) != OK)
+ return ERROR;
+
+ if (dspImmedEXATTR & DEFINED)
+ if (dspImmedEXVAL > 0xffffff)
+ return error("long address is bigger than $ffffff");
+
+ deposit_extra_ea = DEPOSIT_EXTRA_WORD;
+
+ force_imm = NUM_FORCE_LONG;
+ ea1 = DSP_EA_ABS;
+ goto x_check_immed;
+ }
+ else if (*tok == '<')
+ {
+ // Check for immediate address forced short
+ tok++;
+
+ if (expr(dspImmedEXPR, &dspImmedEXVAL, &dspImmedEXATTR, &dspImmedESYM) != OK)
+ return ERROR;
+
+ force_imm = NUM_FORCE_SHORT;
+
+ if (dspImmedEXATTR & DEFINED)
+ {
+ if (dspImmedEXVAL > 0x3F)
+ {
+ warn("short addressing mode forced but address is bigger than $3F - switching to long");
+ force_imm = NUM_FORCE_LONG;
+ deposit_extra_ea = DEPOSIT_EXTRA_WORD;
+ ea1 = DSP_EA_ABS;
+ }
+ }
+ else
+ {
+ // This might end up as something like 'move Y:<adr,register'
+ // so let's mark it as an extra aa fixup here.
+ // Note: we are branching to x_check_immed without a
+ // defined dspImmed so it's going to be 0. It probably
+ // doesn't harm anything.
+ deposit_extra_ea = DEPOSIT_EXTRA_FIXUP;
+ }
+
+ goto x_check_immed;
+ }
+
+ return error("unknown x: addressing mode");
}
}
+
//
// Main routine to check parallel move modes.
-// It's quite complex so it's split into a few procedures (in fact most of the above ones).
-// A big effort was made so this can be managable and not too hacky, however one look at
-// the 56001 manual regarding parallel moves and you'll know that this is not an easy
-// problem to deal with!
-// dest=destination register from the main opcode. This must not be the same as D1 or D2
-// and that even goes for stuff like dest=A, D1=A0/1/2!!!
+// It's quite complex so it's split into a few procedures (in fact most of the
+// above ones). A big effort was made so this can be managable and not too
+// hacky, however one look at the 56001 manual regarding parallel moves and
+// you'll know that this is not an easy // problem to deal with!
+// dest=destination register from the main opcode. This must not be the same
+// as D1 or D2 and that even goes for stuff like dest=A, D1=A0/1/2!!!
//
LONG parmoves(WORD dest)
{
- int force_imm; // Addressing mode force operator
- int immreg; // Immediate register destination
- LONG inst; // 16 bit bitfield that has the parallel move opcode
- LONG S1, S2, D1, D2; // Source and Destinations
- LONG ea1; // ea bitfields
+ int force_imm; // Addressing mode force operator
+ int immreg; // Immediate register destination
+ LONG inst; // 16 bit bitfield that has the parallel move opcode
+ LONG S1, S2, D1, D2; // Source and Destinations
+ LONG ea1; // ea bitfields
+
+ if (*tok == EOL)
+ {
+ // No parallel move
+ return B16(00100000, 00000000);
+ }
+
+ if (*tok == '#')
+ {
+ // '#xxxxxx,D', '#xx,D'
+ tok++;
+ force_imm = NUM_NORMAL;
- if (*tok == EOL)
- {
- // No parallel move
- return B16(00100000, 00000000);
- }
- if (*tok == '#')
- {
- // '#xxxxxx,D', '#xx,D'
- tok++;
- force_imm = NUM_NORMAL;
- if (*tok == '>')
- {
- force_imm = NUM_FORCE_LONG;
- tok++;
- }
- else if (*tok == '<')
- {
- force_imm = NUM_FORCE_SHORT;
- tok++;
- }
+ if (*tok == '>')
+ {
+ force_imm = NUM_FORCE_LONG;
+ tok++;
+ }
+ else if (*tok == '<')
+ {
+ force_imm = NUM_FORCE_SHORT;
+ tok++;
+ }
- if (expr(dspImmedEXPR, &dspImmedEXVAL, &dspImmedEXATTR, &dspImmedESYM) != OK)
- return ERROR;
+ if (expr(dspImmedEXPR, &dspImmedEXVAL, &dspImmedEXATTR, &dspImmedESYM) != OK)
+ return ERROR;
- if (*tok++ != ',')
- return error("expected comma");
+ if (*tok++ != ',')
+ return error("expected comma");
- if (!((*tok >= KW_X0 && *tok <= KW_N7) || (*tok >= KW_R0 && *tok <= KW_R7) || (*tok >= KW_A0 && *tok <= KW_A2)))
- return error("expected x0,x1,y0,y1,a0,b0,a2,b2,a1,b1,a,b,r0-r7,n0-n7 after immediate");
- immreg = SDreg(*tok++);
+ if (!((*tok >= KW_X0 && *tok <= KW_N7) || (*tok >= KW_R0 && *tok <= KW_R7) || (*tok >= KW_A0 && *tok <= KW_A2)))
+ return error("expected x0,x1,y0,y1,a0,b0,a2,b2,a1,b1,a,b,r0-r7,n0-n7 after immediate");
- if (*tok == EOL)
- {
- if (!(dspImmedEXATTR & FLOAT))
- {
- if (dspImmedEXATTR & DEFINED)
- {
- // From I parallel move:
- // "If the destination register D is X0, X1, Y0, Y1, A, or B, the 8-bit immediate short operand
- // is interpreted as a signed fraction and is stored in the specified destination register.
- // That is, the 8 - bit data is stored in the eight MS bits of the destination operand, and the
- // remaining bits of the destination operand D are zeroed."
- // The funny bit is that Motorola assembler can parse something like 'move #$FF0000,b' into an
- // I (immediate short move) - so let's do that as well then...
- if (((immreg >= 4 && immreg <= 7) || immreg == 14 || immreg == 15) && force_imm != NUM_FORCE_LONG)
- {
- if ((dspImmedEXVAL & 0xffff) == 0)
- {
- dspImmedEXVAL >>= 16;
- }
- }
- if (force_imm == NUM_FORCE_SHORT)
- {
- if (dspImmedEXVAL<0xff && (int32_t)dspImmedEXVAL>-0x100)
- {
- // '#xx,D'
- // value fits in 8 bits - immediate move
- inst = B16(00100000, 00000000) + (immreg << 8) + (uint32_t)dspImmedEXVAL;
- return inst;
- }
- else
- {
- warn("forced short immediate value doesn't fit in 8 bits - switching to long");
- force_imm = NUM_FORCE_LONG;
- }
- }
- if (force_imm == NUM_FORCE_LONG)
- {
- // '#xxxxxx,D'
- // it can either be
- // X or Y Data move. I don't think it matters much
- // which of the two it will be, so let's use X.
- deposit_immediate_long_with_register:
- inst = B16(01000000, 11110100);
- inst |= ((immreg & 0x18) << (12 - 3)) + ((immreg & 7) << 8);
- deposit_extra_ea = DEPOSIT_EXTRA_WORD;
- return inst;
- }
- if (((int32_t)dspImmedEXVAL < 0x100) && ((int32_t)dspImmedEXVAL >= -0x100))
- {
- // value fits in 8 bits - immediate move
- deposit_immediate_short_with_register:
- inst = B16(00100000, 00000000) + (immreg << 8) + (uint32_t)dspImmedEXVAL;
- return inst;
- }
- else
- {
- // value doesn't fit in 8 bits, so it can either be
- // X or Y Data move. I don't think it matters much
- // which of the two it will be, so let's use X:.
- // TODO: if we're just goto'ing perhaps the logic can be simplified
- goto deposit_immediate_long_with_register;
- }
- }
- else
- {
- if (force_imm != NUM_FORCE_SHORT)
- {
- // '#xxxxxx,D'
- // TODO: if we're just goto'ing perhaps the logic can be simplified
- goto deposit_immediate_long_with_register;
- }
- else
- {
- // '#xx,D' - I mode
- // No visibility of the number so let's add a fixup for this
- AddFixup(FU_DSPIMM8, sloc, dspImmedEXPR);
- inst = B16(00100000, 00000000);
- inst |= ((immreg & 0x18) << (11 - 3)) + ((immreg & 7) << 8);
- return inst;
- }
+ immreg = SDreg(*tok++);
- }
- }
- else
- {
- // Float constant
- if (dspImmedEXATTR & DEFINED)
- {
+ if (*tok == EOL)
+ {
+ if (!(dspImmedEXATTR & FLOAT))
+ {
+ if (dspImmedEXATTR & DEFINED)
+ {
+ // From I parallel move:
+ // "If the destination register D is X0, X1, Y0, Y1, A, or B, the 8-bit immediate short operand
+ // is interpreted as a signed fraction and is stored in the specified destination register.
+ // That is, the 8 - bit data is stored in the eight MS bits of the destination operand, and the
+ // remaining bits of the destination operand D are zeroed."
+ // The funny bit is that Motorola assembler can parse something like 'move #$FF0000,b' into an
+ // I (immediate short move) - so let's do that as well then...
+ if (((immreg >= 4 && immreg <= 7) || immreg == 14 || immreg == 15) && force_imm != NUM_FORCE_LONG)
+ {
+ if ((dspImmedEXVAL & 0xffff) == 0)
+ {
+ dspImmedEXVAL >>= 16;
+ }
+ }
+
+ if (force_imm == NUM_FORCE_SHORT)
+ {
+ if (dspImmedEXVAL < 0xFF && (int32_t)dspImmedEXVAL > -0x100)
+ {
+ // '#xx,D'
+ // value fits in 8 bits - immediate move
+ inst = B16(00100000, 00000000) + (immreg << 8) + (uint32_t)dspImmedEXVAL;
+ return inst;
+ }
+ else
+ {
+ warn("forced short immediate value doesn't fit in 8 bits - switching to long");
+ force_imm = NUM_FORCE_LONG;
+ }
+ }
+
+ if (force_imm == NUM_FORCE_LONG)
+ {
+ // '#xxxxxx,D'
+ // it can either be
+ // X or Y Data move. I don't think it matters much
+ // which of the two it will be, so let's use X.
+deposit_immediate_long_with_register:
+ inst = B16(01000000, 11110100);
+ inst |= ((immreg & 0x18) << (12 - 3)) + ((immreg & 7) << 8);
+ deposit_extra_ea = DEPOSIT_EXTRA_WORD;
+ return inst;
+ }
+
+ if (((int32_t)dspImmedEXVAL < 0x100) && ((int32_t)dspImmedEXVAL >= -0x100))
+ {
+ // value fits in 8 bits - immediate move
+deposit_immediate_short_with_register:
+ inst = B16(00100000, 00000000) + (immreg << 8) + (uint32_t)dspImmedEXVAL;
+ return inst;
+ }
+ else
+ {
+ // value doesn't fit in 8 bits, so it can either be
+ // X or Y Data move. I don't think it matters much
+ // which of the two it will be, so let's use X:.
+ // TODO: if we're just goto'ing perhaps the logic can be simplified
+ goto deposit_immediate_long_with_register;
+ }
+ }
+ else
+ {
+ if (force_imm != NUM_FORCE_SHORT)
+ {
+ // '#xxxxxx,D'
+ // TODO: if we're just goto'ing perhaps the logic can be simplified
+ goto deposit_immediate_long_with_register;
+ }
+ else
+ {
+ // '#xx,D' - I mode
+ // No visibility of the number so let's add a fixup for this
+ AddFixup(FU_DSPIMM8, sloc, dspImmedEXPR);
+ inst = B16(00100000, 00000000);
+ inst |= ((immreg & 0x18) << (11 - 3)) + ((immreg & 7) << 8);
+ return inst;
+ }
+ }
+ }
+ else
+ {
+ // Float constant
+ if (dspImmedEXATTR & DEFINED)
+ {
+ double f = *(double *)&dspImmedEXVAL;
+ // Check direct.c for ossom comments regarding conversion!
+//N.B.: This is bogus, we need to fix this so it does this the right way... !!! FIX !!!
+ dspImmedEXVAL = ((uint32_t)(int32_t)round(f * (1 << 23))) & 0xFFFFFF;
+ double g;
+ g = f * (1 << 23);
+ g = round(g);
+
+ if ((dspImmedEXVAL & 0xFFFF) == 0)
+ {
+ // Value's 16 lower bits are not set so the value can fit in a single byte
+ // (check parallel I move quoted above)
+ warn("Immediate value fits inside 8 bits, so using instruction short format");
+ dspImmedEXVAL >>= 16;
+ goto deposit_immediate_short_with_register;
+ }
- double f = *(double *)&dspImmedEXVAL;
- // Check direct.c for ossom comments regarding conversion!
- dspImmedEXVAL = ((uint32_t)(int32_t)round(f*(1 << 23))) & 0xffffff;
- double g;
- g = f*(1 << 23);
- g = round(g);
+ if (force_imm == NUM_FORCE_SHORT)
+ {
+ if ((dspImmedEXVAL & 0xFFFF) != 0)
+ {
+ warn("Immediate value short format forced but value does not fit inside 8 bits - switching to long format");
+ goto deposit_immediate_long_with_register;
+ }
- if ((dspImmedEXVAL & 0xffff) == 0)
- {
- // Value's 16 lower bits are not set so the value can fit in a single byte
- // (check parallel I move quoted above)
- warn("Immediate value fits inside 8 bits, so using instruction short format");
- dspImmedEXVAL >>= 16;
- goto deposit_immediate_short_with_register;
- }
+ return error("internal assembler error: we haven't implemented floating point constants in parallel mode parser yet!");
+ }
- if (force_imm == NUM_FORCE_SHORT)
- {
- if ((dspImmedEXVAL & 0xffff) != 0)
- {
- warn("Immediate value short format forced but value does not fit inside 8 bits - switching to long format");
- goto deposit_immediate_long_with_register;
- }
- return error("internal assembler error: we haven't implemented floating point constants in parallel mode parser yet!");
- }
- // If we reach here we either have NUM_FORCE_LONG or nothing, so we might as well store a long.
- goto deposit_immediate_long_with_register;
- }
- else
- {
- if (force_imm == NUM_FORCE_SHORT)
- {
+ // If we reach here we either have NUM_FORCE_LONG or nothing, so we might as well store a long.
+ goto deposit_immediate_long_with_register;
+ }
+ else
+ {
+ if (force_imm == NUM_FORCE_SHORT)
+ {
goto deposit_immediate_short_with_register;
- }
- else
- {
- // Just deposit a float fixup
- AddFixup(FU_DSPIMMFL8, sloc, dspImmedEXPR);
- inst = B16(00100000, 00000000);
- inst |= ((immreg & 0x18) << (12 - 3)) + ((immreg & 7) << 8);
- return inst;
- }
- }
- }
- }
- else
- {
- // At this point we can only have '#xxxxxx,D1 S2,D2' (X:R Class I)
-
- switch (immreg)
- {
- case 4: D1 = 0 << 10;break; // X0
- case 5: D1 = 1 << 10;break; // X1
- case 14: D1 = 2 << 10;break; // A
- case 15: D1 = 3 << 10;break; // B
- default: return error("unrecognised X:R parallel move syntax: D1 can only be x0,x1,a,b in '#xxxxxx,D1 S2,D2'"); break;
- }
+ }
+ else
+ {
+ // Just deposit a float fixup
+ AddFixup(FU_DSPIMMFL8, sloc, dspImmedEXPR);
+ inst = B16(00100000, 00000000);
+ inst |= ((immreg & 0x18) << (12 - 3)) + ((immreg & 7) << 8);
+ return inst;
+ }
+ }
+ }
+ }
+ else
+ {
+ // At this point we can only have '#xxxxxx,D1 S2,D2' (X:R Class I)
+ switch (immreg)
+ {
+ case 4: D1 = 0 << 10;break; // X0
+ case 5: D1 = 1 << 10;break; // X1
+ case 14: D1 = 2 << 10;break; // A
+ case 15: D1 = 3 << 10;break; // B
+ default: return error("unrecognised X:R parallel move syntax: D1 can only be x0,x1,a,b in '#xxxxxx,D1 S2,D2'"); break;
+ }
- switch (*tok++)
- {
- case KW_A: S2 = 0 << 9; break;
- case KW_B: S2 = 1 << 9; break;
- default: return error("unrecognised X:R parallel move syntax: S2 can only be A or B in '#xxxxxx,D1 S2,D2'"); break;
- }
+ switch (*tok++)
+ {
+ case KW_A: S2 = 0 << 9; break;
+ case KW_B: S2 = 1 << 9; break;
+ default: return error("unrecognised X:R parallel move syntax: S2 can only be A or B in '#xxxxxx,D1 S2,D2'"); break;
+ }
- if (*tok++ != ',')
- return error("unrecognised X:R parallel move syntax: expected comma after '#xxxxxx,D1 S2'");
+ if (*tok++ != ',')
+ return error("unrecognised X:R parallel move syntax: expected comma after '#xxxxxx,D1 S2'");
- switch (*tok++)
- {
- case KW_Y0: D2 = 0 << 8; break;
- case KW_Y1: D2 = 1 << 8; break;
- default: return error("unrecognised X:R parallel move syntax: D2 can only be Y0 or Y1 in '#xxxxxx,D1 S2,D2'"); break;
- }
+ switch (*tok++)
+ {
+ case KW_Y0: D2 = 0 << 8; break;
+ case KW_Y1: D2 = 1 << 8; break;
+ default: return error("unrecognised X:R parallel move syntax: D2 can only be Y0 or Y1 in '#xxxxxx,D1 S2,D2'"); break;
+ }
- if (*tok != EOL)
- return error("unrecognised X:R parallel move syntax: expected end-of-line after '#xxxxxx,D1 S2,D2'");
+ if (*tok != EOL)
+ return error("unrecognised X:R parallel move syntax: expected end-of-line after '#xxxxxx,D1 S2,D2'");
- inst = B16(00010000, 10110100) | D1 | S2 | D2;
- deposit_extra_ea = DEPOSIT_EXTRA_WORD;
- return inst;
- }
- }
- else if (*tok == KW_X)
- {
+ inst = B16(00010000, 10110100) | D1 | S2 | D2;
+ deposit_extra_ea = DEPOSIT_EXTRA_WORD;
+ return inst;
+ }
+ }
+ else if (*tok == KW_X)
+ {
if (tok[1] == ',')
// Hey look, it's just the register X and not the addressing mode - fall through to general case
goto parse_everything_else;
tok++;
if (*tok++ != ':')
- return error("expected ':' after 'X' in parallel move (i.e. X:)");
+ return error("expected ':' after 'X' in parallel move (i.e. X:)");
// 'X:ea,D' or 'X:aa,D' or 'X:ea,D1 S2,D2' or 'X:eax,D1 Y:eay,D2' or 'X:eax,D1 S2,Y:eay'
return parse_x(1, B16(01000000, 00000000), 0, 1);
- }
- else if (*tok == KW_Y)
- {
+ }
+ else if (*tok == KW_Y)
+ {
if (tok[1] == ',')
// Hey look, it's just the register y and not the addressing mode - fall through to general case
goto parse_everything_else;
tok++;
+
if (*tok++ != ':')
- return error("expected ':' after 'Y' in parallel move (i.e. Y:)");
+ return error("expected ':' after 'Y' in parallel move (i.e. Y:)");
// 'Y:ea,D' or 'Y:aa,D'
- return parse_y(B16(01001000, 10000000), 0, 0, 0);
- }
- else if (*tok == KW_L)
- {
- // 'L:ea,D' or 'L:aa,D'
- tok++;
- if (*tok++ != ':')
- return error("expected ':' after 'L' in parallel move (i.e. L:)");
-
- return parse_l(1, B16(01000000, 11000000), 0);
- }
- else if ((*tok >= KW_X0 && *tok <= KW_N7) || (*tok >= KW_R0 && *tok <= KW_R7) || (*tok >= KW_A0 && *tok <= KW_A2) || (*tok >= KW_A10 && *tok <= KW_BA))
- {
- // Everything else - brace for impact!
- // R: 'S,D'
- // X: 'S,X:ea' 'S,X:aa'
- // X:R 'S,X:ea S2,D2' 'A,X:ea X0,A' 'B,X:ea X0,B'
- // Y: 'S,Y:ea' 'S,Y:aa'
- // R:Y: 'S1,D1 Y:ea,D2' 'S1,D1 S2,Y:ea' 'Y0,A A,Y:ea' 'Y0,B B,Y:ea' 'S1,D1 #xxxxxx,D2' 'Y0,A A,Y:ea' 'Y0,B B,Y:ea'
- // L: 'S,L:ea' 'S,L:aa'
+ return parse_y(B16(01001000, 10000000), 0, 0, 0);
+ }
+ else if (*tok == KW_L)
+ {
+ // 'L:ea,D' or 'L:aa,D'
+ tok++;
+ if (*tok++ != ':')
+ return error("expected ':' after 'L' in parallel move (i.e. L:)");
+
+ return parse_l(1, B16(01000000, 11000000), 0);
+ }
+ else if ((*tok >= KW_X0 && *tok <= KW_N7) || (*tok >= KW_R0 && *tok <= KW_R7) || (*tok >= KW_A0 && *tok <= KW_A2) || (*tok >= KW_A10 && *tok <= KW_BA))
+ {
+ // Everything else - brace for impact!
+ // R: 'S,D'
+ // X: 'S,X:ea' 'S,X:aa'
+ // X:R 'S,X:ea S2,D2' 'A,X:ea X0,A' 'B,X:ea X0,B'
+ // Y: 'S,Y:ea' 'S,Y:aa'
+ // R:Y: 'S1,D1 Y:ea,D2' 'S1,D1 S2,Y:ea' 'Y0,A A,Y:ea' 'Y0,B B,Y:ea' 'S1,D1 #xxxxxx,D2' 'Y0,A A,Y:ea' 'Y0,B B,Y:ea'
+ // L: 'S,L:ea' 'S,L:aa'
LONG L_S1;
parse_everything_else:
L_S1 = *tok++;
S1 = SDreg(L_S1);
- if (*tok++ != ',')
- return error("Comma expected after 'S')");
+ if (*tok++ != ',')
+ return error("Comma expected after 'S')");
- if (*tok == KW_X)
- {
- // 'S,X:ea' 'S,X:aa' 'S,X:ea S2,D2' 'S1,X:eax Y:eay,D2' 'S1,X:eax S2,Y:eay'
- // 'A,X:ea X0,A' 'B,X:ea X0,B'
- tok++;
- if (*tok++ != ':')
- return error("unrecognised X: parallel move syntax: expected ':' after 'S,X'");
- return parse_x(0, B16(01000000, 00000000), S1, 1);
- }
- else if (*tok == KW_Y)
- {
- // 'S,Y:ea' 'S,Y:aa'
- tok++;
- if (*tok++ != ':')
- return error("unrecognised Y: parallel move syntax: expected ':' after 'S,Y'");
- return parse_y(B16(0000000, 00000000), S1, 0, 0);
- }
- else if (*tok == KW_L)
- {
- // 'S,L:ea' 'S,L:aa'
- tok++;
- if (*tok++ != ':')
- return error("unrecognised L: parallel move syntax: expected ':' after 'S,L'");
- return parse_l(1, B16(00000000, 00000000), L_S1);
- }
- else if ((*tok >= KW_X0 && *tok <= KW_N7) || (*tok >= KW_R0 && *tok <= KW_R7) || (*tok >= KW_A0 && *tok <= KW_A2))
- {
- // 'S,D'
- // 'S1,D1 Y:ea,D2' 'S1,D1 S2,Y:ea' 'S1,D1 #xxxxxx,D2'
- // 'Y0,A A,Y:ea' 'Y0,B B,Y:ea'
- D1 = SDreg(*tok++);
- if (*tok == EOL)
- {
- // R 'S,D'
- inst = B16(00100000, 00000000);
- inst |= (S1 << 5) | (D1);
- return inst;
- }
- else if (*tok == KW_Y)
- {
- // 'S1,D1 Y:ea,D2'
- tok++;
- if (*tok++ != ':')
- return error("expected ':' after 'Y' in parallel move (i.e. Y:)");
- return parse_y(B16(00010000, 01000000), S1, D1, 0);
+ if (*tok == KW_X)
+ {
+ // 'S,X:ea' 'S,X:aa' 'S,X:ea S2,D2' 'S1,X:eax Y:eay,D2' 'S1,X:eax S2,Y:eay'
+ // 'A,X:ea X0,A' 'B,X:ea X0,B'
+ tok++;
- }
- else if (*tok == KW_A || *tok == KW_B || *tok == KW_Y0 || *tok == KW_Y1)
- {
- // 'Y0,A A,Y:ea' 'Y0,B B,Y:ea' 'S1,D1 S2,Y:ea'
- S2 = SDreg(*tok++);
- if (S1 == 6 && D1 == 14 && S2 == 14)
- {
- // 'Y0,A A,Y:ea'
- if (*tok++ != ',')
- return error("unrecognised Y: parallel move syntax: expected ',' after Y0,A A");
- if (*tok++ != KW_Y)
- return error("unrecognised Y: parallel move syntax: expected 'Y' after Y0,A A,");
- if (*tok++ != ':')
- return error("unrecognised Y: parallel move syntax: expected ':' after Y0,A A,Y");
- ea1 = checkea_full(EOL, Y_ERRORS);
- if (ea1 == ERROR)
- return ERROR;
- inst = B16(00001000, 10000000);
- inst |= 0 << 8;
- inst |= ea1;
- return inst;
- }
- else if (S1 == 6 && D1 == 15 && S2 == 15)
- {
- // 'Y0,B B,Y:ea'
- if (*tok++ != ',')
- return error("unrecognised Y: parallel move syntax: expected ',' after Y0,B B");
- if (*tok++ != KW_Y)
- return error("unrecognised Y: parallel move syntax: expected 'Y' after Y0,B B,");
- if (*tok++ != ':')
- return error("unrecognised Y: parallel move syntax: expected ':' after Y0,B B,Y");
- ea1 = checkea_full(EOL, Y_ERRORS);
- if (ea1 == ERROR)
- return ERROR;
- inst = B16(00001000, 10000000);
- inst |= 1 << 8;
- inst |= ea1;
- return inst;
- }
- else if ((S1 == 14 || S1 == 15) && (D1 == 4 || D1 == 5) && (S2 == 6 || S2 == 7 || S2 == 14 || S2 == 15))
- {
- //'S1,D1 S2,Y:ea'
- if (*tok++ != ',')
- return error("unrecognised Y: parallel move syntax: expected ',' after S1,D1 S2");
- if (*tok++ != KW_Y)
- return error("unrecognised Y: parallel move syntax: expected 'Y' after S1,D1 S2,");
- if (*tok++ != ':')
- return error("unrecognised Y: parallel move syntax: expected ':' after S1,D1 S2,Y");
- ea1 = checkea_full(EOL, Y_ERRORS);
- if (ea1 == ERROR)
- return ERROR;
- inst = B16(00010000, 01000000);
- inst |= (S1 & 1) << 11;
- inst |= (D1 & 1) << 10;
- inst |= ((S2 & 8) << (10 - 4)) | ((S2 & 1) << 8);
- inst |= ea1;
- return inst;
- }
- else
- return error("unrecognised Y: parallel move syntax: only 'Y0,A A,Y:ea' 'Y0,B B,Y:ea' allowed'");
- // Check for Y:
- }
- else if (*tok == '#')
- {
- // R:Y: 'S1,D1 #xxxxxx,D2'
- tok++;
- if (*tok == '>')
- {
- // Well, forcing an immediate to be 24 bits is legal here
- // but then it's the only available option so my guess is that this
- // is simply superfluous. So let's just eat the character
- tok++;
- }
- if (expr(dspaaEXPR, &dspaaEXVAL, &dspaaEXATTR, &dspaaESYM) != OK)
- return ERROR;
- if (dspImmedEXATTR & DEFINED)
- if (dspImmedEXVAL > 0xffffff)
- return error("immediate is bigger than $ffffff");
- deposit_extra_ea = DEPOSIT_EXTRA_WORD;
- if (*tok++ != ',')
- return error("Comma expected after 'S1,D1 #xxxxxx')");
- // S1 is a or b, D1 is x0 or x1 and d2 is y0, y1, a or b
- switch (*tok++)
- {
- case KW_Y0: D2 = 0 << 8; break;
- case KW_Y1: D2 = 1 << 8; break;
- case KW_A: D2 = 2 << 8; break;
- case KW_B: D2 = 3 << 8; break;
- default: return error("unrecognised R:Y: parallel move syntax: D2 must be y0, y1, a or b in 'S1,D1 #xxxxxx,D2'");
- }
+ if (*tok++ != ':')
+ return error("unrecognised X: parallel move syntax: expected ':' after 'S,X'");
- if (S1 == 14 || S1 == 15)
- {
- if (D1 == 4 || D1 == 5)
- {
- inst = B16(00010000, 11110100);
- inst |= (S1 & 1) << 11;
- inst |= (D1 & 1) << 10;
- inst |= D2;
- dspImmedEXVAL = dspaaEXVAL;
- return inst;
- }
- else
- return error("unrecognised R:Y: parallel move syntax: D1 must be x0 or x1 in 'S1,D1 #xxxxxx,D2'");
- }
- else
- return error("unrecognised R:Y: parallel move syntax: S1 must be a or b in 'S1,D1 #xxxxxx,D2'");
- }
- else
- return error("unrecognised R:Y: parallel move syntax: Unexpected text after S,D in 'S1,D1 #xxxxxx,D2'");
- }
- else
- return error("unrecognised R:Y: parallel move syntax: Unexpected text after 'S,'");
- }
- else if (*tok == '(')
- {
- // U: 'ea'
- // U 'ea' can only be '(Rn)-Nn', '(Rn)+Nn', '(Rn)-' or '(Rn)+'
- tok++;
- if (*tok >= KW_R0 && *tok <= KW_R7)
- {
- ea1 = (*tok++ - KW_R0);
- }
- else
- return error("unrecognised U parallel move syntax: expected 'Rn' after '('");
- if (*tok++ != ')')
- return error("unrecognised U parallel move syntax: expected ')' after '(Rn'");
- if (*tok == '+')
- {
- tok++;
- if (*tok == EOL)
- // (Rn)+
- ea1 |= 3 << 3;
- else if (*tok >= KW_N0 && *tok <= KW_N7)
- {
- // (Rn)+Nn
- if ((*tok++ & 7) != ea1)
- return error("unrecognised U parallel move syntax: Same register number expected for Rn, Nn in '(Rn)+Nn')");
- ea1 |= 1 << 3;
- if (*tok != EOL)
- return error("unrecognised U parallel move syntax: expected End-Of-Line after '(Rn)+Nn'");
- }
- else
- return error("unrecognised U parallel move syntax: expected End-Of-Line or 'Nn' after '(Rn)+'");
+ return parse_x(0, B16(01000000, 00000000), S1, 1);
+ }
+ else if (*tok == KW_Y)
+ {
+ // 'S,Y:ea' 'S,Y:aa'
+ tok++;
- }
- else if (*tok == '-')
- {
- tok++;
- if (*tok == EOL)
- {
- // (Rn)-
- ea1 |= 2 << 3;
- tok++;
- }
- else if (*tok >= KW_N0 && *tok <= KW_N7)
- {
- // (Rn)-Nn
- if ((*tok++ & 7) != ea1)
- return error("unrecognised U parallel move syntax: Same register number expected for Rn, Nn in '(Rn)-Nn')");
- ea1 |= 0 << 3;
- if (*tok != EOL)
- return error("unrecognised U parallel move syntax: expected End-Of-Line after '(Rn)-Nn'");
- }
- }
+ if (*tok++ != ':')
+ return error("unrecognised Y: parallel move syntax: expected ':' after 'S,Y'");
- inst = B16(00100000, 01000000);
- inst |= ea1;
- return inst;
- }
- else
- return error("extra (unexpected) text found");
+ return parse_y(B16(0000000, 00000000), S1, 0, 0);
+ }
+ else if (*tok == KW_L)
+ {
+ // 'S,L:ea' 'S,L:aa'
+ tok++;
+
+ if (*tok++ != ':')
+ return error("unrecognised L: parallel move syntax: expected ':' after 'S,L'");
+
+ return parse_l(1, B16(00000000, 00000000), L_S1);
+ }
+ else if ((*tok >= KW_X0 && *tok <= KW_N7) || (*tok >= KW_R0 && *tok <= KW_R7) || (*tok >= KW_A0 && *tok <= KW_A2))
+ {
+ // 'S,D'
+ // 'S1,D1 Y:ea,D2' 'S1,D1 S2,Y:ea' 'S1,D1 #xxxxxx,D2'
+ // 'Y0,A A,Y:ea' 'Y0,B B,Y:ea'
+ D1 = SDreg(*tok++);
+
+ if (*tok == EOL)
+ {
+ // R 'S,D'
+ inst = B16(00100000, 00000000);
+ inst |= (S1 << 5) | (D1);
+ return inst;
+ }
+ else if (*tok == KW_Y)
+ {
+ // 'S1,D1 Y:ea,D2'
+ tok++;
+ if (*tok++ != ':')
+ return error("expected ':' after 'Y' in parallel move (i.e. Y:)");
+ return parse_y(B16(00010000, 01000000), S1, D1, 0);
+
+ }
+ else if (*tok == KW_A || *tok == KW_B || *tok == KW_Y0 || *tok == KW_Y1)
+ {
+ // 'Y0,A A,Y:ea' 'Y0,B B,Y:ea' 'S1,D1 S2,Y:ea'
+ S2 = SDreg(*tok++);
+
+ if (S1 == 6 && D1 == 14 && S2 == 14)
+ {
+ // 'Y0,A A,Y:ea'
+ if (*tok++ != ',')
+ return error("unrecognised Y: parallel move syntax: expected ',' after Y0,A A");
+
+ if (*tok++ != KW_Y)
+ return error("unrecognised Y: parallel move syntax: expected 'Y' after Y0,A A,");
+
+ if (*tok++ != ':')
+ return error("unrecognised Y: parallel move syntax: expected ':' after Y0,A A,Y");
+
+ ea1 = checkea_full(EOL, Y_ERRORS);
+
+ if (ea1 == ERROR)
+ return ERROR;
+
+ inst = B16(00001000, 10000000);
+ inst |= 0 << 8;
+ inst |= ea1;
+ return inst;
+ }
+ else if (S1 == 6 && D1 == 15 && S2 == 15)
+ {
+ // 'Y0,B B,Y:ea'
+ if (*tok++ != ',')
+ return error("unrecognised Y: parallel move syntax: expected ',' after Y0,B B");
+
+ if (*tok++ != KW_Y)
+ return error("unrecognised Y: parallel move syntax: expected 'Y' after Y0,B B,");
+
+ if (*tok++ != ':')
+ return error("unrecognised Y: parallel move syntax: expected ':' after Y0,B B,Y");
+
+ ea1 = checkea_full(EOL, Y_ERRORS);
+
+ if (ea1 == ERROR)
+ return ERROR;
+
+ inst = B16(00001000, 10000000);
+ inst |= 1 << 8;
+ inst |= ea1;
+ return inst;
+ }
+ else if ((S1 == 14 || S1 == 15) && (D1 == 4 || D1 == 5) && (S2 == 6 || S2 == 7 || S2 == 14 || S2 == 15))
+ {
+ //'S1,D1 S2,Y:ea'
+ if (*tok++ != ',')
+ return error("unrecognised Y: parallel move syntax: expected ',' after S1,D1 S2");
+
+ if (*tok++ != KW_Y)
+ return error("unrecognised Y: parallel move syntax: expected 'Y' after S1,D1 S2,");
+
+ if (*tok++ != ':')
+ return error("unrecognised Y: parallel move syntax: expected ':' after S1,D1 S2,Y");
+
+ ea1 = checkea_full(EOL, Y_ERRORS);
+
+ if (ea1 == ERROR)
+ return ERROR;
+
+ inst = B16(00010000, 01000000);
+ inst |= (S1 & 1) << 11;
+ inst |= (D1 & 1) << 10;
+ inst |= ((S2 & 8) << (10 - 4)) | ((S2 & 1) << 8);
+ inst |= ea1;
+ return inst;
+ }
+ else
+ return error("unrecognised Y: parallel move syntax: only 'Y0,A A,Y:ea' 'Y0,B B,Y:ea' allowed'");
+ // Check for Y:
+ }
+ else if (*tok == '#')
+ {
+ // R:Y: 'S1,D1 #xxxxxx,D2'
+ tok++;
+
+ if (*tok == '>')
+ {
+ // Well, forcing an immediate to be 24 bits is legal here
+ // but then it's the only available option so my guess is that this
+ // is simply superfluous. So let's just eat the character
+ tok++;
+ }
+
+ if (expr(dspaaEXPR, &dspaaEXVAL, &dspaaEXATTR, &dspaaESYM) != OK)
+ return ERROR;
+
+ if (dspImmedEXATTR & DEFINED)
+ if (dspImmedEXVAL > 0xffffff)
+ return error("immediate is bigger than $ffffff");
+
+ deposit_extra_ea = DEPOSIT_EXTRA_WORD;
+
+ if (*tok++ != ',')
+ return error("Comma expected after 'S1,D1 #xxxxxx')");
+
+ // S1 is a or b, D1 is x0 or x1 and d2 is y0, y1, a or b
+ switch (*tok++)
+ {
+ case KW_Y0: D2 = 0 << 8; break;
+ case KW_Y1: D2 = 1 << 8; break;
+ case KW_A: D2 = 2 << 8; break;
+ case KW_B: D2 = 3 << 8; break;
+ default: return error("unrecognised R:Y: parallel move syntax: D2 must be y0, y1, a or b in 'S1,D1 #xxxxxx,D2'");
+ }
+
+ if (S1 == 14 || S1 == 15)
+ {
+ if (D1 == 4 || D1 == 5)
+ {
+ inst = B16(00010000, 11110100);
+ inst |= (S1 & 1) << 11;
+ inst |= (D1 & 1) << 10;
+ inst |= D2;
+ dspImmedEXVAL = dspaaEXVAL;
+ return inst;
+ }
+ else
+ return error("unrecognised R:Y: parallel move syntax: D1 must be x0 or x1 in 'S1,D1 #xxxxxx,D2'");
+ }
+ else
+ return error("unrecognised R:Y: parallel move syntax: S1 must be a or b in 'S1,D1 #xxxxxx,D2'");
+ }
+ else
+ return error("unrecognised R:Y: parallel move syntax: Unexpected text after S,D in 'S1,D1 #xxxxxx,D2'");
+ }
+ else
+ return error("unrecognised R:Y: parallel move syntax: Unexpected text after 'S,'");
+ }
+ else if (*tok == '(')
+ {
+ // U: 'ea'
+ // U 'ea' can only be '(Rn)-Nn', '(Rn)+Nn', '(Rn)-' or '(Rn)+'
+ tok++;
+
+ if (*tok >= KW_R0 && *tok <= KW_R7)
+ {
+ ea1 = (*tok++ - KW_R0);
+ }
+ else
+ return error("unrecognised U parallel move syntax: expected 'Rn' after '('");
+
+ if (*tok++ != ')')
+ return error("unrecognised U parallel move syntax: expected ')' after '(Rn'");
+
+ if (*tok == '+')
+ {
+ tok++;
+
+ if (*tok == EOL)
+ // (Rn)+
+ ea1 |= 3 << 3;
+ else if (*tok >= KW_N0 && *tok <= KW_N7)
+ {
+ // (Rn)+Nn
+ if ((*tok++ & 7) != ea1)
+ return error("unrecognised U parallel move syntax: Same register number expected for Rn, Nn in '(Rn)+Nn')");
+
+ ea1 |= 1 << 3;
+
+ if (*tok != EOL)
+ return error("unrecognised U parallel move syntax: expected End-Of-Line after '(Rn)+Nn'");
+ }
+ else
+ return error("unrecognised U parallel move syntax: expected End-Of-Line or 'Nn' after '(Rn)+'");
+ }
+ else if (*tok == '-')
+ {
+ tok++;
+
+ if (*tok == EOL)
+ {
+ // (Rn)-
+ ea1 |= 2 << 3;
+ tok++;
+ }
+ else if (*tok >= KW_N0 && *tok <= KW_N7)
+ {
+ // (Rn)-Nn
+ if ((*tok++ & 7) != ea1)
+ return error("unrecognised U parallel move syntax: Same register number expected for Rn, Nn in '(Rn)-Nn')");
+
+ ea1 |= 0 << 3;
+
+ if (*tok != EOL)
+ return error("unrecognised U parallel move syntax: expected End-Of-Line after '(Rn)-Nn'");
+ }
+ }
+
+ inst = B16(00100000, 01000000);
+ inst |= ea1;
+ return inst;
+ }
+ else
+ return error("extra (unexpected) text found");
- return OK;
+ return OK;
}
projects / rmac / blobdiff