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mame/src/emu/cpu/spc700/spc700.c
Aaron Giles 3598b772bc Replace "const address_space" with "address_space" throughout the system. 
The purpose of making it const before was to discourage direct tampering,
but private/protected does a better job of that now anyhow, and it is
annoying now.

    s/const[ \t]+address_space\b/address_space/g;

Is basically what I did.
2010-08-19 07:26:14 +00:00

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/* ======================================================================== */
/* =============================== COPYRIGHT ============================== */
/* ======================================================================== */
/*
Sony/Nintendo SPC700 CPU Emulator
The SPC700 is 6502-based at heart but contains a lot of the extended
opcodes of the Mitsubishi 770 and 7700 series 65xxx-based MCUs, plus
a few special twists borrowed from the 68000.
It was designed by Sony's Ken Kutaragi, later the "father of the PlayStation".
Original emulation by Anthony Kruize and Lee Hammerton.
Substantially revised by R. Belmont.
Thanks to Anonymous, TRAC, Brad Martin, anomie, Blargg, and everyone
else on ZSNES Technical for probing the darker corners of the SNES
with test programs so we have a chance at getting things accurate.
MESS Bugzilla bugs:
- 804 ADC sets carry too late (FIXED)
- 805 ADDW/SUBW set V wrongly (FIXED)
- 806 BRK should modify PSW (FIXED)
- 807 DAA/DAS problem (FIXED)
*/
/* ======================================================================== */
/* ================================= NOTES ================================ */
/* ======================================================================== */
/*
snes mapped ports: f0-ff
Address Function Register R/W When Reset Remarks
00F0H (test) --- ------ Installed in sound-CPU
00F1H Control W Control = "00-000"
00F2H Register Add. R/W Indeterminate Installed in DSP
00F3H Register Data R/W Indeterminate Installed in DSP
00F4H Port-0 R/W Port0r = "00" Installed in sound-CPU
Port0w = "00"
00F5H Port-1 R/W Port1r = "00" Installed in sound-CPU
Port1w = "00"
00F6H Port-2 R/W Port2r = "00" Installed in sound-CPU
Port2w = "00"
00F7H Port-3 R/W Port3r = "00" Installed in sound-CPU
Port3w = "00"
00F8H ------ --- ---------- -------------------
00F9H ------ --- ---------- -------------------
00FAH Timer-0 W Indeterminate Installed in sound-CPU
00FBH Timer-1 W Indeterminate Installed in sound-CPU
00FCH Timer-2 W Indeterminate Installed in sound-CPU
00FDH Counter-0 W Indeterminate Installed in sound-CPU
00FEH Counter-1 W Indeterminate Installed in sound-CPU
00FFH Counter-2 W Indeterminate Installed in sound-CPU
*/
/* ======================================================================== */
/* ================================ INCLUDES ============================== */
/* ======================================================================== */
#include <limits.h>
#include "emu.h"
#include "debugger.h"
#include "spc700.h"
/* CPU Structure */
typedef struct
{
uint a; /* Accumulator */
uint x; /* Index Register X */
uint y; /* Index Register Y */
uint s; /* Stack Pointer */
uint pc; /* Program Counter */
uint ppc; /* Previous Program Counter */
uint flag_n; /* Negative Flag */
uint flag_z; /* Zero flag */
uint flag_v; /* Overflow Flag */
uint flag_p; /* Direct Page Flag */
uint flag_b; /* BRK Instruction Flag */
uint flag_h; /* Half-carry Flag */
uint flag_i; /* Interrupt Mask Flag */
uint flag_c; /* Carry Flag */
uint line_irq; /* Status of the IRQ line */
uint line_nmi; /* Status of the NMI line */
uint line_rst; /* Status of the RESET line */
uint ir; /* Instruction Register */
device_irq_callback int_ack;
legacy_cpu_device *device;
address_space *program;
uint stopped; /* stopped status */
int ICount;
uint source;
uint destination;
uint temp1, temp2, temp3;
short spc_int16;
int spc_int32;
} spc700i_cpu;
INLINE spc700i_cpu *get_safe_token(running_device *device)
{
assert(device != NULL);
assert(device->type() == SPC700);
return (spc700i_cpu *)downcast<legacy_cpu_device *>(device)->token();
}
/* ======================================================================== */
/* ==================== ARCHITECTURE-DEPENDANT DEFINES ==================== */
/* ======================================================================== */
/* This should be set to the default size of your processor (min 16 bit) */
#undef uint
#define uint unsigned int
#undef uint8
#define uint8 unsigned char
#undef int8
/* Allow for architectures that don't have 8-bit sizes */
#if UCHAR_MAX == 0xff
#define int8 char
#define MAKE_INT_8(A) (int8)((A)&0xff)
#else
#define int8 int
INLINE int MAKE_INT_8(int A) {return (A & 0x80) ? A | ~0xff : A & 0xff;}
#endif /* UCHAR_MAX == 0xff */
#define MAKE_UINT_8(A) ((A)&0xff)
#define MAKE_UINT_16(A) ((A)&0xffff)
/* ======================================================================== */
/* ============================ GENERAL DEFINES =========================== */
/* ======================================================================== */
/* Bits */
#define BIT_0 0x01
#define BIT_1 0x02
#define BIT_2 0x04
#define BIT_3 0x08
#define BIT_4 0x10
#define BIT_5 0x20
#define BIT_6 0x40
#define BIT_7 0x80
#define BIT_8 0x100
/* Flag positions in Processor Status Register */
#define FLAGPOS_N BIT_7 /* Negative */
#define FLAGPOS_V BIT_6 /* Overflow */
#define FLAGPOS_P BIT_5 /* Direct Page Selector */
#define FLAGPOS_B BIT_4 /* Break */
#define FLAGPOS_H BIT_3 /* Half-carry */
#define FLAGPOS_I BIT_2 /* Interrupt */
#define FLAGPOS_Z BIT_1 /* Zero */
#define FLAGPOS_C BIT_0 /* Carry */
#define NFLAG_SET FLAGPOS_N
#define VFLAG_SET BIT_7
#define PFLAG_SET BIT_8
#define BFLAG_SET FLAGPOS_B
#define HFLAG_SET BIT_3
#define IFLAG_SET FLAGPOS_I
#define ZFLAG_SET 0
#define CFLAG_SET BIT_8
#define NZFLAG_CLEAR 1
#define VFLAG_CLEAR 0
#define PFLAG_CLEAR 0
#define BFLAG_CLEAR 0
#define HFLAG_CLEAR 0
#define IFLAG_CLEAR 0
#define CFLAG_CLEAR 0
#define NMI_SET 1
#define NMI_CLEAR 0
#define IRQ_SET IFLAG_CLEAR
#define IRQ_CLEAR IFLAG_SET
#define STACK_PAGE 0x100 /* Stack Page Offset */
#define VECTOR_RST 0xfffe /* Reset */
#define VECTOR_BRK 0xffde /* Break Instruction */
#define VECTOR_IRQ 0xfffc /* IRQ ??? what is real vector? */
#define VECTOR_NMI 0xfffa /* NMI ??? what is real vector? */
#define REG_A cpustate->a /* Accumulator */
#define REG_X cpustate->x /* Index X Register */
#define REG_Y cpustate->y /* Index Y Register */
#define REG_S cpustate->s /* Stack Pointer */
#define REG_PC cpustate->pc /* Program Counter */
#define REG_PPC cpustate->ppc /* Previous Program Counter */
#define REG_P cpustate->p /* Processor Status Register */
#define FLAG_NZ cpustate->flag_n = cpustate->flag_z /* Negative Flag and inverted Zero flag */
#define FLAG_N cpustate->flag_n /* Negative flag */
#define FLAG_Z cpustate->flag_z /* Inverted Zero flag */
#define FLAG_V cpustate->flag_v /* Overflow Flag */
#define FLAG_P cpustate->flag_p /* Direct Page Flag */
#define FLAG_B cpustate->flag_b /* BRK Instruction Flag */
#define FLAG_H cpustate->flag_h /* Decimal Mode Flag */
#define FLAG_I cpustate->flag_i /* Interrupt Mask Flag */
#define FLAG_C cpustate->flag_c /* Carry Flag */
#define LINE_IRQ cpustate->line_irq /* Status of the IRQ line */
#define LINE_NMI cpustate->line_nmi /* Status of the NMI line */
#define REG_IR cpustate->ir /* Instruction Register */
#define INT_ACK cpustate->int_ack /* Interrupt Acknowledge function pointer */
#define CLOCKS cpustate->ICount /* Clock cycles remaining */
#define CPU_STOPPED cpustate->stopped /* Stopped status */
#define SRC cpustate->source /* Source Operand */
#define DST cpustate->destination /* Destination Operand */
#define TMP1 cpustate->temp1 /* temporary result 1 */
#define TMP2 cpustate->temp2 /* temporary result 2 */
#define TMP3 cpustate->temp3 /* temporary result 3 */
#define STOP_LEVEL_STOP 1
#define STOP_LEVEL_SLEEP 2
/* ======================================================================== */
/* ============================ GENERAL MACROS ============================ */
/* ======================================================================== */
/* Codition code tests */
#define COND_CC() (!(FLAG_C&0x100)) /* Carry Clear */
#define COND_CS() (FLAG_C&0x100) /* Carry Set */
#define COND_EQ() (!FLAG_Z) /* Equal */
#define COND_NE() (FLAG_Z) /* Not Equal */
#define COND_MI() (FLAG_N&0x80) /* Minus */
#define COND_PL() (!(FLAG_N&0x80)) /* Plus */
#define COND_VC() (!(FLAG_V&0x80)) /* Overflow Clear */
#define COND_VS() (FLAG_V&0x80) /* Overflow Set */
/* Set Overflow flag in math operations */
#define VFLAG_ADD_8(S, D, R) ((S^R) & (D^R))
#define VFLAG_ADD_16(S, D, R) (((S^R) & (D^R))>>8)
#define VFLAG_SUB_8(S, D, R) ((S^D) & (R^D))
#define VFLAG_SUB_16(S, D, R) (((S^D) & (R^D))>>8)
#define CFLAG_AS_1() ((FLAG_C>>8)&1)
#define CFLAG_AS_NOT_1() (!(FLAG_C&CFLAG_SET))
#define NZFLAG_16(A) (((A)&0x7f) | (((A)>>1)&0x40) | (((A)>>8)&0xff))
#define CFLAG_16(A) ((A)>>8)
/* ======================================================================== */
/* ================================= MAME ================================= */
/* ======================================================================== */
#define spc700_read_8(addr) memory_read_byte_8le(cpustate->program,addr)
#define spc700_write_8(addr,data) memory_write_byte_8le(cpustate->program,addr,data)
#define spc700_read_8_direct(A) spc700_read_8(A)
#define spc700_write_8_direct(A, V) spc700_write_8(A, V)
//#define spc700_read_instruction(A) memory_decrypted_read_byte(cpustate->program,A)
//#define spc700_read_8_immediate(A) memory_raw_read_byte(cpustate->program,A)
#define spc700_read_instruction(A) memory_read_byte_8le(cpustate->program,A)
#define spc700_read_8_immediate(A) memory_read_byte_8le(cpustate->program,A)
#define spc700_jumping(A)
#define spc700_branching(A)
/* ======================================================================== */
/* ============================ UTILITY MACROS ============================ */
/* ======================================================================== */
/* Use up clock cycles */
#define CLK(A) CLOCKS -= (A)
#define CLK_ALL() CLOCKS = 0
#define BREAKOUT break
INLINE uint read_8_normal(spc700i_cpu *cpustate, uint address)
{
address = MAKE_UINT_16(address);
return spc700_read_8(address);
}
INLINE uint read_8_immediate(spc700i_cpu *cpustate, uint address)
{
address = MAKE_UINT_16(address);
return spc700_read_8_immediate(address);
}
#ifdef UNUSED_FUNCTION
INLINE uint read_8_instruction(spc700i_cpu *cpustate, uint address)
{
address = MAKE_UINT_16(address);
return spc700_read_instruction(address);
}
#endif
INLINE uint read_8_direct(spc700i_cpu *cpustate, uint address)
{
address = MAKE_UINT_8(address) | FLAG_P;
return spc700_read_8_direct(address);
}
INLINE void write_8_normal(spc700i_cpu *cpustate, uint address, uint value)
{
address = MAKE_UINT_16(address);
value = MAKE_UINT_8(value);
spc700_write_8(address, value);
}
INLINE void write_8_direct(spc700i_cpu *cpustate, uint address, uint value)
{
address = MAKE_UINT_8(address) | FLAG_P;
value = MAKE_UINT_8(value);
spc700_write_8_direct(address, value);
}
INLINE uint read_16_normal(spc700i_cpu *cpustate, uint address)
{
return read_8_normal(cpustate, address) | (read_8_normal(cpustate, address+1)<<8);
}
INLINE uint read_16_immediate(spc700i_cpu *cpustate, uint address)
{
return read_8_immediate(cpustate, address) | (read_8_immediate(cpustate, address+1)<<8);
}
INLINE uint read_16_direct(spc700i_cpu *cpustate, uint address)
{
return read_8_direct(cpustate, address) | (read_8_direct(cpustate, address+1)<<8);
}
INLINE void write_16_direct(spc700i_cpu *cpustate, uint address, uint value)
{
write_8_direct(cpustate, address, value);
write_8_direct(cpustate, address+1, value>>8);
}
/* Low level memory access macros */
#define read_8_NORM(A) read_8_normal(cpustate, A)
#define read_8_IMM(A) read_8_immediate(cpustate, A)
#define read_8_ABS(A) read_8_normal(cpustate, A)
#define read_8_ABX(A) read_8_normal(cpustate, A)
#define read_8_ABY(A) read_8_normal(cpustate, A)
#define read_8_AXI(A) read_8_normal(cpustate, A)
#define read_8_DP(A) read_8_direct(cpustate, A)
#define read_8_DPX(A) read_8_direct(cpustate, A)
#define read_8_DPY(A) read_8_direct(cpustate, A)
#define read_8_DPI(A) read_8_normal(cpustate, A)
#define read_8_DXI(A) read_8_normal(cpustate, A)
#define read_8_DIY(A) read_8_normal(cpustate, A)
#define read_8_STK(A) read_8_normal(cpustate, A)
#define read_8_XI(A) read_8_direct(cpustate, A)
#define read_8_XII(A) read_8_direct(cpustate, A)
#define read_8_YI(A) read_8_direct(cpustate, A)
#define read_16_NORM(A) read_16_normal(cpustate, A)
#define read_16_IMM(A) read_16_immediate(cpustate, A)
#define read_16_ABS(A) read_16_absolute(cpustate, A)
#define read_16_ABX(A) read_16_normal(cpustate, A)
#define read_16_DP(A) read_16_direct(cpustate, A)
#define read_16_DPX(A) read_16_direct(cpustate, A)
#define read_16_DPY(A) read_16_direct(cpustate, A)
#define read_16_DPI(A) read_16_normal(cpustate, A)
#define read_16_VEC(A) read_16_normal(cpustate, A)
#define read_16_XI(A) read_16_direct(cpustate, A)
#define read_16_XII(A) read_16_direct(cpustate, A)
#define read_16_YI(A) read_16_direct(cpustate, A)
#define write_8_NORM(A, V) write_8_normal(cpustate, A, V)
#define write_8_IMM(A, V) write_8_normal(cpustate, A, V)
#define write_8_ABS(A, V) write_8_normal(cpustate, A, V)
#define write_8_ABX(A, V) write_8_normal(cpustate, A, V)
#define write_8_ABY(A, V) write_8_normal(cpustate, A, V)
#define write_8_AXI(A, V) write_8_normal(cpustate, A, V)
#define write_8_DP(A, V) write_8_direct(cpustate, A, V)
#define write_8_DPX(A, V) write_8_direct(cpustate, A, V)
#define write_8_DPY(A, V) write_8_direct(cpustate, A, V)
#define write_8_DPI(A, V) write_8_normal(cpustate, A, V)
#define write_8_DXI(A, V) write_8_normal(cpustate, A, V)
#define write_8_DIY(A, V) write_8_normal(cpustate, A, V)
#define write_8_STK(A, V) write_8_normal(cpustate, A, V)
#define write_8_XI(A, V) write_8_direct(cpustate, A, V)
#define write_8_XII(A, V) write_8_direct(cpustate, A, V)
#define write_8_YI(A, V) write_8_direct(cpustate, A, V)
#define write_16_NORM(A, V) write_16_normal(cpustate, A, V)
#define write_16_ABS(A, V) write_16_normal(cpustate, A, V)
#define write_16_ABX(A, V) write_16_normal(cpustate, A, V)
#define write_16_ABY(A, V) write_16_normal(cpustate, A, V)
#define write_16_AXI(A, V) write_16_normal(cpustate, A, V)
#define write_16_DP(A, V) write_16_direct(cpustate, A, V)
#define write_16_DPX(A, V) write_16_direct(cpustate, A, V)
#define write_16_DPY(A, V) write_16_direct(cpustate, A, V)
#define write_16_DPI(A, V) write_16_normal(cpustate, A, V)
#define write_16_DXI(A, V) write_16_normal(cpustate, A, V)
#define write_16_DIY(A, V) write_16_normal(cpustate, A, V)
#define write_16_STK(A, V) write_16_normal(cpustate, A, V)
#define write_16_XI(A, V) write_16_direct(cpustate, A, V)
#define write_16_XII(A, V) write_16_direct(cpustate, A, V)
#define write_16_YI(A, V) write_16_direct(cpustate, A, V)
#define OPER_8_IMM(cpustate) read_8_IMM(EA_IMM(cpustate))
#define OPER_8_ABS(cpustate) read_8_ABS(EA_ABS(cpustate))
#define OPER_8_ABX(cpustate) read_8_ABX(EA_ABX(cpustate))
#define OPER_8_ABY(cpustate) read_8_ABY(EA_ABY(cpustate))
#define OPER_8_AXI(cpustate) read_8_IND(EA_IND(cpustate))
#define OPER_8_DP(cpustate) read_8_DP(EA_DP(cpustate))
#define OPER_8_DPX(cpustate) read_8_DPX(EA_DPX(cpustate))
#define OPER_8_DPY(cpustate) read_8_DPY(EA_DPY(cpustate))
#define OPER_8_DPI(cpustate) read_8_DPI(EA_DPI(cpustate))
#define OPER_8_DXI(cpustate) read_8_DXI(EA_DXI(cpustate))
#define OPER_8_DIY(cpustate) read_8_DIY(EA_DIY(cpustate))
#define OPER_8_XI(cpustate) read_8_XI(EA_XI(cpustate))
#define OPER_8_XII(cpustate) read_8_XI(EA_XII(cpustate))
#define OPER_8_YI(cpustate) read_8_YI(EA_YI(cpustate))
#define OPER_16_IMM(cpustate) read_16_IMM(EA_IMM16(cpustate))
#define OPER_16_ABS(cpustate) read_16_ABS(EA_ABS(cpustate))
#define OPER_16_ABX(cpustate) read_16_ABX(EA_ABX(cpustate))
#define OPER_16_ABY(cpustate) read_16_ABY(EA_ABY(cpustate))
#define OPER_16_AXI(cpustate) read_16_IND(EA_IND(cpustate))
#define OPER_16_DP(cpustate) read_16_DP(EA_DP(cpustate))
#define OPER_16_DPX(cpustate) read_16_DPX(EA_DPX(cpustate))
#define OPER_16_DPY(cpustate) read_16_DPY(EA_DPY(cpustate))
#define OPER_16_DPI(cpustate) read_16_DPI(EA_DXI(cpustate))
#define OPER_16_DXI(cpustate) read_16_DXI(EA_DXI(cpustate))
#define OPER_16_DIY(cpustate) read_16_DIY(EA_DIY(cpustate))
#define OPER_16_XI(cpustate) read_16_XI(EA_XI(cpustate))
#define OPER_16_XII(cpustate) read_16_XI(EA_XII(cpustate))
#define OPER_16_YI(cpustate) read_16_YI(EA_YI(cpustate))
/* Effective Address Caluclations */
INLINE uint EA_IMM(spc700i_cpu *cpustate) {return REG_PC++;}
INLINE uint EA_IMM16(spc700i_cpu *cpustate) {REG_PC += 2; return REG_PC-2;}
INLINE uint EA_ABS(spc700i_cpu *cpustate) {return OPER_16_IMM(cpustate);}
INLINE uint EA_ABX(spc700i_cpu *cpustate) {return EA_ABS(cpustate) + REG_X;}
INLINE uint EA_ABY(spc700i_cpu *cpustate) {return EA_ABS(cpustate) + REG_Y;}
INLINE uint EA_AXI(spc700i_cpu *cpustate) {return OPER_16_ABX(cpustate);}
INLINE uint EA_DP(spc700i_cpu *cpustate) {return OPER_8_IMM(cpustate);}
INLINE uint EA_DPX(spc700i_cpu *cpustate) {return (EA_DP(cpustate) + REG_X)&0xff;}
INLINE uint EA_DPY(spc700i_cpu *cpustate) {return (EA_DP(cpustate) + REG_Y)&0xff;}
INLINE uint EA_DXI(spc700i_cpu *cpustate) {return OPER_16_DPX(cpustate);}
INLINE uint EA_DIY(spc700i_cpu *cpustate) {uint addr = OPER_16_DP(cpustate); if((addr&0xff00) != ((addr+REG_Y)&0xff00)) CLK(1); return addr + REG_Y;}
INLINE uint EA_XI(spc700i_cpu *cpustate) {return REG_X;}
INLINE uint EA_XII(spc700i_cpu *cpustate) {uint val = REG_X;REG_X = MAKE_UINT_8(REG_X+1);return val;}
INLINE uint EA_YI(spc700i_cpu *cpustate) {return REG_Y;}
/* Change the Program Counter */
INLINE void JUMP(spc700i_cpu *cpustate, uint address)
{
REG_PC = address;
spc700_jumping(REG_PC);
}
INLINE void BRANCH(spc700i_cpu *cpustate, uint offset)
{
REG_PC = MAKE_UINT_16(REG_PC + MAKE_INT_8(offset));
spc700_branching(REG_PC);
}
#define GET_REG_YA() (REG_A | (REG_Y<<8))
INLINE void SET_REG_YA(spc700i_cpu *cpustate, uint value)
{
REG_A = MAKE_UINT_8(value);
REG_Y = MAKE_UINT_8(value>>8);
}
/* Get the Processor Status Register */
#define GET_REG_P() \
((FLAG_N & 0x80) | \
((FLAG_V & 0x80) >> 1) | \
(FLAG_P>>3) | \
FLAG_B | \
(FLAG_H& HFLAG_SET) | \
FLAG_I | \
((!FLAG_Z) << 1) | \
CFLAG_AS_1())
/* Get Processor Status Register with B flag set (when executing BRK instruction) */
#define GET_REG_P_BRK() \
((FLAG_N & 0x80) | \
((FLAG_V & 0x80) >> 1) | \
(FLAG_P>>3) | \
FLAGPOS_B | \
(FLAG_H & HFLAG_SET) | \
FLAG_I | \
((!FLAG_Z) << 1) | \
CFLAG_AS_1())
/* Get Processor Status Register with B flag cleared (when servicing an interrupt) */
#define GET_REG_P_INT() \
((FLAG_N & 0x80) | \
((FLAG_V & 0x80) >> 1) | \
(FLAG_P>>3) | \
(FLAG_H & HFLAG_SET) | \
FLAG_I | \
((!FLAG_Z) << 1) | \
CFLAG_AS_1())
INLINE void SET_FLAG_I(spc700i_cpu *cpustate, uint value);
/* Set the Process Status Register */
INLINE void SET_REG_P(spc700i_cpu *cpustate, uint value)
{
FLAG_N = (value & 0x80);
FLAG_Z = !(value & 2);
FLAG_V = value<<1;
FLAG_P = (value & FLAGPOS_P) << 3;
FLAG_B = value & FLAGPOS_B;
FLAG_H = value & HFLAG_SET;
FLAG_C = value << 8;
SET_FLAG_I(cpustate, value);
}
/* Push/Pull data to/from the stack */
INLINE void PUSH_8(spc700i_cpu *cpustate, uint value)
{
write_8_STK(REG_S+STACK_PAGE, value);
REG_S = MAKE_UINT_8(REG_S - 1);
}
INLINE uint PULL_8(spc700i_cpu *cpustate)
{
REG_S = MAKE_UINT_8(REG_S + 1);
return read_8_STK(REG_S+STACK_PAGE);
}
INLINE void PUSH_16(spc700i_cpu *cpustate, uint value)
{
PUSH_8(cpustate, value>>8);
PUSH_8(cpustate, value);
}
INLINE uint PULL_16(spc700i_cpu *cpustate)
{
uint value = PULL_8(cpustate);
return value | (PULL_8(cpustate)<<8);
}
#if !SPC700_OPTIMIZE_SNES
INLINE void CHECK_IRQ(spc700i_cpu *cpustate)
{
if(FLAG_I & LINE_IRQ)
SERVICE_IRQ();
}
#endif /* SPC700_OPTIMIZE_SNES */
INLINE void SET_FLAG_I(spc700i_cpu *cpustate, uint value)
{
FLAG_I = value & IFLAG_SET;
#if !SPC700_OPTIMIZE_SNES
CHECK_IRQ(cpustate);
#endif
}
/* ======================================================================== */
/* =========================== OPERATION MACROS =========================== */
/* ======================================================================== */
#define SUBOP_ADC(A, B) \
cpustate->spc_int16 = (A) + (B) + CFLAG_AS_1(); \
TMP1 = ((A) & 0x0f) + (CFLAG_AS_1()); \
FLAG_C = (cpustate->spc_int16 > 0xff) ? CFLAG_SET : 0; \
FLAG_V = (~((A) ^ (B))) & (((A) ^ cpustate->spc_int16) & 0x80); \
FLAG_H = (((cpustate->spc_int16 & 0x0f) - TMP1) & 0x10) >> 1; \
FLAG_NZ = (UINT8)cpustate->spc_int16
/* Add With Carry */
#define OP_ADC(BCLK, MODE) \
CLK(BCLK); \
SRC = OPER_8_##MODE(cpustate); \
SUBOP_ADC(SRC, REG_A); \
REG_A = (UINT8)cpustate->spc_int16;
/* Add With Carry to memory */
#define OP_ADCM(BCLK, SMODE, DMODE) \
CLK(BCLK); \
SRC = OPER_8_##SMODE(cpustate); \
DST = EA_##DMODE(cpustate); \
SUBOP_ADC(SRC, read_8_##DMODE(DST)); \
write_8_##DMODE(DST, (UINT8)cpustate->spc_int16)
/* Add word */
#define OP_ADDW(BCLK) \
CLK(BCLK); \
SRC = OPER_16_DP(cpustate); \
DST = GET_REG_YA(); \
TMP1 = ((SRC) & 0xff) + ((DST) & 0xff); \
TMP2 = (TMP1 > 0xff) ? 1 : 0; \
TMP3 = ((SRC) >> 8) + ((DST) >> 8) + TMP2; \
cpustate->spc_int16 = ((TMP1 & 0xff) + (TMP3 << 8)) & 0xffff; \
FLAG_C = (TMP3 > 0xff) ? CFLAG_SET : 0; \
FLAG_H = ((unsigned) ((((DST) >> 8) & 0x0F) + \
(((SRC) >> 8) & 0x0F) + TMP2)) > 0x0F ? HFLAG_SET : 0; \
FLAG_V = (~((DST) ^ (SRC)) & ((SRC) ^ (UINT16) cpustate->spc_int16) & 0x8000) ? VFLAG_SET : 0; \
FLAG_Z = (cpustate->spc_int16 != 0); \
FLAG_N = (cpustate->spc_int16>>8); \
SET_REG_YA(cpustate, cpustate->spc_int16);
/* Logical AND with accumulator */
#define OP_AND(BCLK, MODE) \
CLK(BCLK); \
FLAG_NZ = REG_A &= OPER_8_##MODE(cpustate)
/* Logical AND operand */
#define OP_ANDM(BCLK, SMODE, DMODE) \
CLK(BCLK); \
FLAG_NZ = OPER_8_##SMODE(cpustate); \
DST = EA_##DMODE(cpustate); \
FLAG_NZ &= read_8_##DMODE(DST); \
write_8_##DMODE(DST, FLAG_NZ)
/* Logical AND bit to C */
#define OP_AND1(BCLK) \
CLK(BCLK); \
DST = EA_IMM16(cpustate); \
if(FLAG_C & CFLAG_SET) \
{ \
DST = read_16_IMM(DST); \
SRC = 1 << (DST >> 13); \
DST &= 0x1fff; \
if(!(read_8_NORM(DST) & SRC)) \
FLAG_C = CFLAG_CLEAR; \
}
/* AND negated bit to C */
#define OP_ANDN1(BCLK) \
CLK(BCLK); \
DST = EA_IMM16(cpustate); \
if(FLAG_C & CFLAG_SET) \
{ \
DST = read_16_IMM(DST); \
SRC = 1 << (DST >> 13); \
DST &= 0x1fff; \
if(read_8_NORM(DST) & SRC) \
FLAG_C = CFLAG_CLEAR; \
}
/* Arithmetic Shift Left accumulator */
#define OP_ASL(BCLK) \
CLK(BCLK); \
FLAG_C = REG_A << 1; \
FLAG_NZ = REG_A = MAKE_UINT_8(FLAG_C)
/* Arithmetic Shift Left operand */
#define OP_ASLM(BCLK, MODE) \
CLK(BCLK); \
DST = EA_##MODE(cpustate); \
FLAG_C = read_8_##MODE(DST) << 1; \
FLAG_NZ = MAKE_UINT_8(FLAG_C); \
write_8_##MODE(DST, FLAG_NZ)
/* Branch if Bit Reset */
#define OP_BBC(BCLK, BIT) \
CLK(BCLK); \
SRC = OPER_8_DP(cpustate); \
DST = OPER_8_IMM(cpustate); \
if(!(SRC & BIT)) \
{ \
CLK(1); \
BRANCH(cpustate, DST); \
}
/* Branch if Bit Set */
#define OP_BBS(BCLK, BIT) \
CLK(BCLK); \
SRC = OPER_8_DP(cpustate); \
DST = OPER_8_IMM(cpustate); \
if(SRC & BIT) \
{ \
CLK(1); \
BRANCH(cpustate, DST); \
}
/* Branch on Condition Code */
#define OP_BCC(BCLK, COND) \
CLK(BCLK); \
DST = OPER_8_IMM(cpustate); \
if(COND) \
{ \
CLK(1); \
BRANCH(cpustate, DST); \
}
/* Branch Unconditional */
/* speed up busy loops */
#define OP_BRA(BCLK) \
CLK(BCLK); \
BRANCH(cpustate, OPER_8_IMM(cpustate)); \
if(REG_PC == REG_PPC) \
CLK_ALL()
/* Cause a Break interrupt */
#define OP_BRK(BCLK) \
CLK(BCLK); \
PUSH_16(cpustate, REG_PC); \
PUSH_8(cpustate, GET_REG_P_BRK()); \
FLAG_B |= FLAGPOS_B; \
FLAG_I = IFLAG_CLEAR; \
JUMP(cpustate, read_16_VEC(VECTOR_BRK))
/* Call subroutine */
#define OP_CALL(BCLK) \
CLK(BCLK); \
DST = EA_ABS(cpustate); \
PUSH_16(cpustate, REG_PC); \
JUMP(cpustate, DST)
/* Compare accumulator and branch if not equal */
#define OP_CBNE(BCLK, MODE) \
CLK(BCLK); \
SRC = OPER_8_##MODE(cpustate); \
DST = EA_IMM(cpustate); \
if(SRC != REG_A) \
{ \
CLK(1); \
BRANCH(cpustate, read_8_IMM(DST)); \
}
/* Clear Carry flag */
#define OP_CLRC(BCLK) \
CLK(BCLK); \
FLAG_C = CFLAG_CLEAR
/* Clear Memory Bit */
#define OP_CLR(BCLK, BIT) \
CLK(BCLK); \
DST = EA_DP(cpustate); \
SRC = read_8_DP(DST) & ~BIT; \
write_8_DP(DST, SRC)
/* Clear Overflow flag (also clears half-carry) */
#define OP_CLRV(BCLK) \
CLK(BCLK); \
FLAG_V = VFLAG_CLEAR; \
FLAG_H = 0;
/* Clear the Page flag */
#define OP_CLRP(BCLK) \
CLK(BCLK); \
FLAG_P = PFLAG_CLEAR
/* Compare operand to register */
#define OP_CMPR(BCLK, REG, MODE) \
CLK(BCLK); \
SRC = OPER_8_##MODE(cpustate); \
cpustate->spc_int16 = (short)REG - (short)SRC; \
FLAG_C = (cpustate->spc_int16 >= 0) ? CFLAG_SET : 0; \
FLAG_NZ = MAKE_UINT_8(cpustate->spc_int16);
/* Compare memory */
#define OP_CMPM(BCLK, SMODE, DMODE) \
CLK(BCLK); \
SRC = OPER_8_##SMODE(cpustate); \
cpustate->spc_int16 = (short)OPER_8_##DMODE(cpustate) - (short)SRC; \
FLAG_C = (cpustate->spc_int16 >= 0) ? CFLAG_SET : 0; \
FLAG_NZ = MAKE_UINT_8(cpustate->spc_int16);
/* Compare word */
#define OP_CMPW(BCLK, MODE) \
CLK(BCLK); \
SRC = OPER_16_##MODE(cpustate); \
cpustate->spc_int32 = (int)GET_REG_YA() - (int)SRC; \
FLAG_C = (cpustate->spc_int32 >= 0) ? CFLAG_SET : 0; \
FLAG_NZ = NZFLAG_16(cpustate->spc_int32);
/* Decimal adjust for addition */
#define OP_DAA(BCLK) \
CLK(BCLK); \
SRC = REG_A; \
if (((SRC & 0x0f) > 9) || (FLAG_H & HFLAG_SET)) \
{ \
REG_A += 6; \
if (REG_A < 6) \
{ \
FLAG_C = CFLAG_SET; \
} \
} \
if ((SRC > 0x99) || (FLAG_C & CFLAG_SET)) \
{ \
REG_A += 0x60; \
FLAG_C = CFLAG_SET; \
} \
FLAG_NZ = REG_A = MAKE_UINT_8(REG_A);
/* Decimal adjust for subtraction */
#define OP_DAS(BCLK) \
CLK(BCLK); \
SRC = REG_A; \
if (!(FLAG_H & HFLAG_SET) || ((SRC & 0xf) > 9)) \
{ \
REG_A -= 6; \
} \
if (!(FLAG_C & CFLAG_SET) || (SRC > 0x99)) \
{ \
REG_A -= 0x60; \
FLAG_C = 0; \
} \
FLAG_NZ = REG_A = MAKE_UINT_8(REG_A)
/* Decrement register and branch if not zero */
/* speed up busy loops */
#define OP_DBNZR(BCLK) \
CLK(BCLK); \
REG_Y = MAKE_UINT_8(REG_Y - 1); \
DST = EA_IMM(cpustate); \
if(REG_Y != 0) \
{ \
CLK(1); \
BRANCH(cpustate, read_8_IMM(DST)); \
}
/* Decrement operand and branch if not zero */
/* Speed up busy loops but do reads/writes for compatibility */
#define OP_DBNZM(BCLK) \
CLK(BCLK); \
DST = EA_DP(cpustate); \
SRC = MAKE_UINT_8(read_8_DP(DST) - 1); \
write_8_DP(DST, SRC); \
DST = EA_IMM(cpustate); \
if(SRC != 0) \
{ \
CLK(1); \
BRANCH(cpustate, read_8_IMM(DST)); \
}
/* Decrement register */
#define OP_DECR(BCLK, REG) \
CLK(BCLK); \
FLAG_NZ = REG = MAKE_UINT_8(REG - 1)
/* Decrement operand */
#define OP_DECM(BCLK, MODE) \
CLK(BCLK); \
DST = EA_##MODE(cpustate); \
FLAG_NZ = MAKE_UINT_8(read_8_##MODE(DST) - 1); \
write_8_##MODE(DST, FLAG_NZ)
/* Decrement word */
#define OP_DECW(BCLK) \
CLK(BCLK); \
DST = EA_DP(cpustate); \
FLAG_NZ = MAKE_UINT_16(read_16_DP(DST) - 1); \
write_16_DP(DST, FLAG_Z); \
FLAG_NZ = NZFLAG_16(FLAG_Z)
/* Disable interrupts */
#define OP_DI(BCLK) \
CLK(BCLK); \
FLAG_I = IFLAG_CLEAR
/* Divide - should be almost exactly how the hardware works */
#define OP_DIV(BCLK) \
CLK(BCLK); \
TMP1 = SRC = GET_REG_YA(); \
TMP2 = (REG_X << 9); \
FLAG_H = 0; \
if ((REG_Y & 0xf) >= (REG_X & 0xf)) FLAG_H = HFLAG_SET; \
for (TMP3 = 0; TMP3 < 9; TMP3++) \
{ \
TMP1 <<= 1; \
if (TMP1 & 0x20000) TMP1 = (TMP1 & 0x1ffff) | 1; \
if (TMP1 >= TMP2) TMP1 ^= 1; \
if (TMP1 & 1) TMP1 = ((TMP1 - TMP2) & 0x1ffff); \
} \
FLAG_V = (TMP1 & 0x100) ? VFLAG_SET : 0; \
SET_REG_YA(cpustate, (((TMP1 >> 9) & 0xff) << 8) + (TMP1 & 0xff)); \
FLAG_NZ = MAKE_UINT_8(GET_REG_YA());
/* Enable interrupts */
#define OP_EI(BCLK) \
CLK(BCLK); \
FLAG_I = IFLAG_SET
/* Exclusive Or operand to accumulator */
#define OP_EOR(BCLK, MODE) \
CLK(BCLK); \
FLAG_NZ = REG_A ^= OPER_8_##MODE(cpustate)
/* Logical EOR operand */
#define OP_EORM(BCLK, SMODE, DMODE) \
CLK(BCLK); \
FLAG_NZ = OPER_8_##SMODE(cpustate); \
DST = EA_##DMODE(cpustate); \
FLAG_NZ ^= read_8_##DMODE(DST); \
write_8_##DMODE(DST, FLAG_NZ)
/* Exclusive OR bit to C */
#define OP_EOR1(BCLK) \
CLK(BCLK); \
DST = OPER_16_IMM(cpustate); \
SRC = 1 << (DST >> 13); \
DST &= 0x1fff; \
if(read_8_NORM(DST) & SRC) \
FLAG_C = ~FLAG_C
/* Increment register */
#define OP_INCR(BCLK, REG) \
CLK(BCLK); \
FLAG_NZ = REG = MAKE_UINT_8(REG + 1)
/* Increment operand */
#define OP_INCM(BCLK, MODE) \
CLK(BCLK); \
DST = EA_##MODE(cpustate); \
FLAG_NZ = MAKE_UINT_8(read_8_##MODE(DST) + 1); \
write_8_##MODE(DST, FLAG_NZ)
/* Increment word */
#define OP_INCW(BCLK) \
CLK(BCLK); \
DST = EA_DP(cpustate); \
FLAG_NZ = MAKE_UINT_16(read_16_DP(DST) + 1); \
write_16_DP(DST, FLAG_Z); \
FLAG_NZ = NZFLAG_16(FLAG_Z)
/* Jump */
/* If we're in a busy loop, eat all clock cycles */
#define OP_JMP(BCLK, MODE) \
CLK(BCLK); \
JUMP(cpustate, EA_##MODE(cpustate)); \
if(REG_PC == REG_PPC) \
CLK_ALL()
/* Jump to Subroutine */
#define OP_JSR(BCLK, MODE) \
CLK(BCLK); \
PUSH_16(cpustate, REG_PC); \
JUMP(cpustate, EA_##MODE(cpustate))
/* Logical Shift Right accumulator */
#define OP_LSR(BCLK) \
CLK(BCLK); \
FLAG_C = REG_A << 8; \
FLAG_NZ = REG_A >>= 1
/* Logical Shift Right operand */
#define OP_LSRM(BCLK, MODE) \
CLK(BCLK); \
DST = EA_##MODE(cpustate); \
FLAG_NZ = read_8_##MODE(DST); \
FLAG_C = FLAG_NZ << 8; \
FLAG_NZ >>= 1; \
write_8_##MODE(DST, FLAG_NZ)
/* Move from register to register */
#define OP_MOVRR(BCLK, SREG, DREG) \
CLK(BCLK); \
FLAG_NZ = DREG = SREG
/* Move from register to memory */
#define OP_MOVRM(BCLK, SREG, DMODE) \
CLK(BCLK); \
write_8_##DMODE(EA_##DMODE(cpustate), SREG)
/* Move from memory to register */
#define OP_MOVMR(BCLK, SMODE, DREG) \
CLK(BCLK); \
FLAG_NZ = DREG = OPER_8_##SMODE(cpustate)
/* Move from memory to memory */
#define OP_MOVMM(BCLK, SMODE, DMODE) \
CLK(BCLK); \
SRC = OPER_8_##SMODE(cpustate); \
DST = EA_##DMODE(cpustate); \
write_8_##DMODE(DST, SRC)
/* Move word register to memory */
#define OP_MOVWRM(BCLK) \
CLK(BCLK); \
write_16_DP(EA_DP(cpustate), GET_REG_YA())
/* Move word memory to register */
#define OP_MOVWMR(BCLK) \
CLK(BCLK); \
FLAG_NZ = OPER_16_DP(cpustate); \
SET_REG_YA(cpustate, FLAG_Z); \
FLAG_NZ = NZFLAG_16(FLAG_Z)
/* Move from Stack pointer to X */
#define OP_MOVSX(BCLK) \
CLK(BCLK); \
FLAG_NZ = REG_X = REG_S
/* Move from X to Stack pointer */
#define OP_MOVXS(BCLK) \
CLK(BCLK); \
REG_S = REG_X
/* Move bit from memory to C */
#define OP_MOV1C(BCLK) \
CLK(BCLK); \
DST = OPER_16_IMM(cpustate); \
SRC = 1 << (DST >> 13); \
DST &= 0x1fff; \
FLAG_C = ((read_8_NORM(DST) & SRC) != 0) << 8
/* Move bit from C to memory */
#define OP_MOV1M(BCLK) \
CLK(BCLK); \
DST = OPER_16_IMM(cpustate); \
SRC = 1 << (DST >> 13); \
DST &= 0x1fff; \
if(FLAG_C & CFLAG_SET) \
write_8_NORM(DST, read_8_NORM(DST) | SRC); \
else \
write_8_NORM(DST, read_8_NORM(DST) & ~SRC)
/* Multiply A and Y and store result in YA */
#define OP_MUL(BCLK) \
CLK(BCLK); \
SRC = REG_Y * REG_A; \
REG_A = MAKE_UINT_8(SRC); \
FLAG_NZ = REG_Y = SRC >> 8;
/* No Operation */
#define OP_NOP(BCLK) \
CLK(BCLK)
/* Invert the C flag */
#define OP_NOTC(BCLK) \
CLK(BCLK); \
FLAG_C = ~FLAG_C
/* NOT bit */
#define OP_NOT1(BCLK) \
CLK(BCLK); \
DST = OPER_16_IMM(cpustate); \
SRC = 1 << (DST >> 13); \
DST &= 0x1fff; \
write_8_NORM(DST, read_8_NORM(DST) ^ SRC)
/* Logical OR operand to accumulator */
#define OP_OR(BCLK, MODE) \
CLK(BCLK); \
FLAG_NZ = REG_A |= OPER_8_##MODE(cpustate)
/* Logical OR operand */
#define OP_ORM(BCLK, SMODE, DMODE) \
CLK(BCLK); \
FLAG_NZ = OPER_8_##SMODE(cpustate); \
DST = EA_##DMODE(cpustate); \
FLAG_NZ |= read_8_##DMODE(DST); \
write_8_##DMODE(DST, FLAG_NZ)
/* Logical OR bit to C */
#define OP_OR1(BCLK) \
CLK(BCLK); \
DST = EA_IMM16(cpustate); \
if(!(FLAG_C & CFLAG_SET)) \
{ \
DST = read_16_IMM(DST); \
SRC = 1 << (DST >> 13); \
DST &= 0x1fff; \
if(read_8_NORM(DST) & SRC) \
FLAG_C = CFLAG_SET; \
}
/* OR negated bit to C */
#define OP_ORN1(BCLK) \
CLK(BCLK); \
DST = EA_IMM16(cpustate); \
if(!(FLAG_C & CFLAG_SET)) \
{ \
DST = read_16_IMM(DST); \
SRC = 1 << (DST >> 13); \
DST &= 0x1fff; \
if(!(read_8_NORM(DST) & SRC)) \
FLAG_C = CFLAG_SET; \
}
/* UPage Call */
#define OP_PCALL(BCLK) \
CLK(BCLK); \
DST = EA_DP(cpustate); \
PUSH_16(cpustate, REG_PC); \
JUMP(cpustate, 0xff00 | DST)
/* Push a register to the stack */
#define OP_PUSH(BCLK, REG) \
CLK(BCLK); \
PUSH_8(cpustate, REG)
/* Push the Processor Status Register to the stack */
#define OP_PHP(BCLK) \
CLK(BCLK); \
PUSH_8(cpustate, GET_REG_P())
/* Pull a register from the stack */
#define OP_PULL(BCLK, REG) \
CLK(BCLK); \
REG = PULL_8(cpustate)
/* Pull the Processor Status Register from the stack */
#define OP_PLP(BCLK) \
CLK(BCLK); \
SET_REG_P(cpustate, PULL_8(cpustate))
/* Return from Subroutine */
#define OP_RET(BCLK) \
CLK(BCLK); \
JUMP(cpustate, PULL_16(cpustate))
/* Return from Interrupt */
#define OP_RETI(BCLK) \
CLK(BCLK); \
SET_REG_P(cpustate, PULL_8(cpustate)); \
JUMP(cpustate, PULL_16(cpustate))
/* Rotate Left the accumulator */
#define OP_ROL(BCLK) \
CLK(BCLK); \
FLAG_C = (REG_A<<1) | CFLAG_AS_1(); \
FLAG_NZ = REG_A = MAKE_UINT_8(FLAG_C)
/* Rotate Left an operand */
#define OP_ROLM(BCLK, MODE) \
CLK(BCLK); \
DST = EA_##MODE(cpustate); \
FLAG_C = (read_8_##MODE(DST)<<1) | CFLAG_AS_1(); \
FLAG_NZ = MAKE_UINT_8(FLAG_C); \
write_8_##MODE(DST, FLAG_NZ)
/* Rotate Right the accumulator */
#define OP_ROR(BCLK) \
CLK(BCLK); \
REG_A |= FLAG_C & 0x100; \
FLAG_C = REG_A << 8; \
FLAG_NZ = REG_A >>= 1
/* Rotate Right an operand */
#define OP_RORM(BCLK, MODE) \
CLK(BCLK); \
DST = EA_##MODE(cpustate); \
FLAG_NZ = read_8_##MODE(DST) | (FLAG_C & 0x100); \
FLAG_C = FLAG_NZ << 8; \
FLAG_NZ >>= 1; \
write_8_##MODE(DST, FLAG_NZ)
/* Subtract with Carry */
#define OP_SBC(BCLK, MODE) \
CLK(BCLK); \
SRC = OPER_8_##MODE(cpustate); \
TMP2 = REG_A - SRC - (CFLAG_AS_1() ^ 1); \
SUBOP_ADC(REG_A, ~SRC); \
FLAG_C = (TMP2 <= 0xff) ? CFLAG_SET : 0; \
REG_A = (UINT8)cpustate->spc_int16;
/* Subtract With Carry to memory */
#define OP_SBCM(BCLK, SMODE, DMODE) \
CLK(BCLK); \
SRC = OPER_8_##SMODE(cpustate); \
DST = EA_##DMODE(cpustate); \
TMP3 = read_8_##DMODE(DST); \
TMP2 = TMP3 - SRC - (CFLAG_AS_1() ^ 1); \
SUBOP_ADC(~SRC, TMP3); \
FLAG_C = (TMP2 <= 0xff) ? CFLAG_SET : 0; \
write_8_##DMODE(DST, (UINT8)cpustate->spc_int16)
/* Set Carry flag */
#define OP_SETC(BCLK) \
CLK(BCLK); \
FLAG_C = CFLAG_SET
/* Set Page flag */
#define OP_SETP(BCLK) \
CLK(BCLK); \
FLAG_P = PFLAG_SET
/* Set Memory Bit */
#define OP_SET(BCLK, BIT) \
CLK(BCLK); \
DST = EA_DP(cpustate); \
SRC = read_8_DP(DST) | BIT; \
write_8_DP(DST, SRC)
/* Put the CPU to sleep */
#define OP_SLEEP(BCLK) \
CLK(BCLK); \
CPU_STOPPED |= STOP_LEVEL_SLEEP; \
CLK_ALL()
/* Stop the CPU */
#define OP_STOP(BCLK) \
CLK(BCLK); \
CPU_STOPPED |= STOP_LEVEL_STOP; \
CLK_ALL()
/* Subtract word */
#define OP_SUBW(BCLK) \
CLK(BCLK); \
SRC = OPER_16_DP(cpustate); \
DST = GET_REG_YA(); \
TMP1 = ((DST) & 0xff) - ((SRC) & 0xff); \
TMP2 = (TMP1 > 0xff) ? 1 : 0; \
TMP3 = ((DST) >> 8) - ((SRC) >> 8) - TMP2; \
cpustate->spc_int16 = ((TMP1 & 0xff) + (TMP3 << 8)) & 0xffff; \
FLAG_C = (TMP3 <= 0xff) ? CFLAG_SET : 0; \
FLAG_H = ((unsigned) ((((DST) >> 8) & 0x0F) - \
(((SRC) >> 8) & 0x0F) - TMP2)) > 0x0F ? 0: HFLAG_SET; \
FLAG_V = (((DST) ^ (SRC)) & ((DST) ^ (UINT16) cpustate->spc_int16) & 0x8000) ? VFLAG_SET : 0; \
FLAG_Z = (cpustate->spc_int16 != 0); \
FLAG_N = (cpustate->spc_int16>>8); \
SET_REG_YA(cpustate, cpustate->spc_int16);
/* Table Call */
#define OP_TCALL(BCLK, NUM) \
CLK(BCLK); \
PUSH_16(cpustate, REG_PC); \
JUMP(cpustate, read_16_NORM(0xffc0 + ((15-NUM)<<1)))
/* Test and Clear Bits */
#define OP_TCLR1(BCLK, MODE) \
CLK(BCLK); \
DST = EA_##MODE(cpustate); \
FLAG_NZ = read_8_##MODE(DST); \
write_8_##MODE(DST, FLAG_NZ & ~REG_A); \
FLAG_NZ &= REG_A
/* Test and Set Bits */
#define OP_TSET1(BCLK, MODE) \
CLK(BCLK); \
DST = EA_##MODE(cpustate); \
FLAG_NZ = read_8_##MODE(DST); \
write_8_##MODE(DST, FLAG_NZ | REG_A); \
FLAG_NZ &= REG_A
/* Exchange high and low nybbles of accumulator */
#define OP_XCN(BCLK) \
CLK(BCLK); \
FLAG_NZ = REG_A = MAKE_UINT_8((REG_A<<4) | (REG_A>>4))
#define OP_ILLEGAL(BCLK) \
CLK(BCLK)
/* ======================================================================== */
/* ================================= API ================================== */
/* ======================================================================== */
static void state_register( legacy_cpu_device *device )
{
spc700i_cpu *cpustate = get_safe_token(device);
state_save_register_device_item(device, 0, cpustate->a);
state_save_register_device_item(device, 0, cpustate->x);
state_save_register_device_item(device, 0, cpustate->y);
state_save_register_device_item(device, 0, cpustate->s);
state_save_register_device_item(device, 0, cpustate->pc);
state_save_register_device_item(device, 0, cpustate->ppc);
state_save_register_device_item(device, 0, cpustate->flag_n);
state_save_register_device_item(device, 0, cpustate->flag_z);
state_save_register_device_item(device, 0, cpustate->flag_v);
state_save_register_device_item(device, 0, cpustate->flag_p);
state_save_register_device_item(device, 0, cpustate->flag_b);
state_save_register_device_item(device, 0, cpustate->flag_h);
state_save_register_device_item(device, 0, cpustate->flag_i);
state_save_register_device_item(device, 0, cpustate->flag_c);
state_save_register_device_item(device, 0, cpustate->line_irq);
state_save_register_device_item(device, 0, cpustate->line_nmi);
state_save_register_device_item(device, 0, cpustate->line_rst);
state_save_register_device_item(device, 0, cpustate->ir);
state_save_register_device_item(device, 0, cpustate->stopped);
state_save_register_device_item(device, 0, cpustate->ICount);
state_save_register_device_item(device, 0, cpustate->source);
state_save_register_device_item(device, 0, cpustate->destination);
state_save_register_device_item(device, 0, cpustate->temp1);
state_save_register_device_item(device, 0, cpustate->temp2);
state_save_register_device_item(device, 0, cpustate->temp3);
state_save_register_device_item(device, 0, cpustate->spc_int16);
state_save_register_device_item(device, 0, cpustate->spc_int32);
}
static CPU_INIT( spc700 )
{
spc700i_cpu *cpustate = get_safe_token(device);
state_register(device);
INT_ACK = irqcallback;
cpustate->device = device;
cpustate->program = device->space(AS_PROGRAM);
}
static CPU_RESET( spc700 )
{
spc700i_cpu *cpustate = get_safe_token(device);
CPU_STOPPED = 0;
#if !SPC700_OPTIMIZE_SNES
LINE_IRQ = 0;
LINE_NMI = 0;
#endif /* SPC700_OPTIMIZE_SNES */
REG_S = 0;
FLAG_NZ = NZFLAG_CLEAR;
FLAG_V = VFLAG_CLEAR;
FLAG_P = PFLAG_CLEAR;
FLAG_B = BFLAG_CLEAR;
FLAG_H = HFLAG_CLEAR;
FLAG_I = IFLAG_CLEAR;
FLAG_C = CFLAG_CLEAR;
JUMP(cpustate, read_16_VEC(VECTOR_RST));
}
/* Exit and clean up */
static CPU_EXIT( spc700 )
{
/* nothing to do yet */
}
/* Assert or clear the NMI line of the CPU */
static void spc700_set_nmi_line(spc700i_cpu *cpustate,int state)
{
#if !SPC700_OPTIMIZE_SNES
if(state == CLEAR_LINE)
LINE_NMI = 0;
else if(!LINE_NMI)
{
LINE_NMI = 1;
CLK(7);
PUSH_16(cpustate, REG_PC);
PUSH_8(cpustate, GET_REG_P_INT());
JUMP(cpustate, read_16_VEC(VECTOR_NMI));
}
#endif /* SPC700_OPTIMIZE_SNES */
}
/* Assert or clear the IRQ line of the CPU */
static void spc700_set_irq_line(spc700i_cpu *cpustate,int line, int state)
{
#if !SPC700_OPTIMIZE_SNES
LINE_IRQ = (state != CLEAR_LINE) ? IRQ_SET : IRQ_CLEAR;
CHECK_IRQ();
#endif /* SPC700_OPTIMIZE_SNES */
}
#include "spc700ds.h"
//int dump_flag = 0;
/* Execute instructions for <clocks> cycles */
static CPU_EXECUTE( spc700 )
{
spc700i_cpu *cpustate = get_safe_token(device);
if (CPU_STOPPED)
{
CLOCKS = 0;
return;
}
while(CLOCKS > 0)
{
REG_PPC = REG_PC;
debugger_instruction_hook(device, REG_PC);
REG_PC++;
switch(REG_IR = read_8_immediate(cpustate, REG_PPC))
{
case 0x00: OP_NOP ( 2 ); break; /* NOP */
case 0x01: OP_TCALL ( 8, 0 ); break; /* TCALL 0 */
case 0x02: OP_SET ( 4, BIT_0 ); break; /* SET 0 */
case 0x03: OP_BBS ( 5, BIT_0 ); break; /* BBS 0 */
case 0x04: OP_OR ( 3, DP ); break; /* ORA dp */
case 0x05: OP_OR ( 4, ABS ); break; /* ORA abs */
case 0x06: OP_OR ( 3, XI ); break; /* ORA xi */
case 0x07: OP_OR ( 6, DXI ); break; /* ORA dxi */
case 0x08: OP_OR ( 2, IMM ); break; /* ORA imm */
case 0x09: OP_ORM ( 6, DP , DP ); break; /* ORM dp dp */
case 0x0a: OP_OR1 ( 5 ); break; /* OR1 bit */
case 0x0b: OP_ASLM ( 4, DP ); break; /* ASL dp */
case 0x0c: OP_ASLM ( 4, ABS ); break; /* ASL abs */
case 0x0d: OP_PHP ( 4 ); break; /* PHP */
case 0x0e: OP_TSET1 ( 6, ABS ); break; /* TSET1 abs */
case 0x0f: OP_BRK ( 8 ); break; /* BRK */
case 0x10: OP_BCC ( 2, COND_PL() ); break; /* BPL */
case 0x11: OP_TCALL ( 8, 1 ); break; /* TCALL 1 */
case 0x12: OP_CLR ( 4, BIT_0 ); break; /* CLR 0 */
case 0x13: OP_BBC ( 5, BIT_0 ); break; /* BBC 0 */
case 0x14: OP_OR ( 4, DPX ); break; /* ORA dpx */
case 0x15: OP_OR ( 5, ABX ); break; /* ORA abx */
case 0x16: OP_OR ( 5, ABY ); break; /* ORA aby */
case 0x17: OP_OR ( 6, DIY ); break; /* ORA diy */
case 0x18: OP_ORM ( 6, IMM, DP ); break; /* ORM dp, imm */
case 0x19: OP_ORM ( 6, YI, XI ); break; /* ORM xi, yi */
case 0x1a: OP_DECW ( 6 ); break; /* DECW di */
case 0x1b: OP_ASLM ( 5, DPX ); break; /* ASL dpx */
case 0x1c: OP_ASL ( 2 ); break; /* ASL a */
case 0x1d: OP_DECR ( 2, REG_X ); break; /* DEC x */
case 0x1e: OP_CMPR ( 4, REG_X, ABS ); break; /* CMP x, abs */
case 0x1f: OP_JMP ( 6, AXI ); break; /* JMP axi */
case 0x20: OP_CLRP ( 2 ); break; /* CLRP */
case 0x21: OP_TCALL ( 8, 2 ); break; /* TCALL 2 */
case 0x22: OP_SET ( 4, BIT_1 ); break; /* SET 1 */
case 0x23: OP_BBS ( 5, BIT_1 ); break; /* BBS 1 */
case 0x24: OP_AND ( 3, DP ); break; /* AND dp */
case 0x25: OP_AND ( 4, ABS ); break; /* AND abs */
case 0x26: OP_AND ( 3, XI ); break; /* AND xi */
case 0x27: OP_AND ( 6, DXI ); break; /* AND dxi */
case 0x28: OP_AND ( 2, IMM ); break; /* AND imm */
case 0x29: OP_ANDM ( 6, DP , DP ); break; /* AND dp, dp */
case 0x2a: OP_ORN1 ( 5 ); break; /* OR1 !bit */
case 0x2b: OP_ROLM ( 4, DP ); break; /* ROL dp */
case 0x2c: OP_ROLM ( 5, ABS ); break; /* ROL abs */
case 0x2d: OP_PUSH ( 4, REG_A ); break; /* PUSH a */
case 0x2e: OP_CBNE ( 5, DP ); break; /* CBNE dp */
case 0x2f: OP_BRA ( 4 ); break; /* BRA */
case 0x30: OP_BCC ( 2, COND_MI() ); break; /* BMI */
case 0x31: OP_TCALL ( 8, 3 ); break; /* TCALL 3 */
case 0x32: OP_CLR ( 4, BIT_1 ); break; /* CLR 1 */
case 0x33: OP_BBC ( 5, BIT_1 ); break; /* BBC 1 */
case 0x34: OP_AND ( 4, DPX ); break; /* AND dpx */
case 0x35: OP_AND ( 5, ABX ); break; /* AND abx */
case 0x36: OP_AND ( 5, ABY ); break; /* AND aby */
case 0x37: OP_AND ( 6, DIY ); break; /* AND diy */
case 0x38: OP_ANDM ( 5, IMM, DP ); break; /* AND dp, imm */
case 0x39: OP_ANDM ( 5, YI , XI ); break; /* AND xi, yi */
case 0x3a: OP_INCW ( 6 ); break; /* INCW di */
case 0x3b: OP_ROLM ( 5, DPX ); break; /* ROL dpx */
case 0x3c: OP_ROL ( 2 ); break; /* ROL acc */
case 0x3d: OP_INCR ( 2, REG_X ); break; /* INC x */
case 0x3e: OP_CMPR ( 3, REG_X, DP ); break; /* CMP x, dp */
case 0x3f: OP_CALL ( 8 ); break; /* CALL abs */
case 0x40: OP_SETP ( 2 ); break; /* RTI */
case 0x41: OP_TCALL ( 8, 4 ); break; /* TCALL 4 */
case 0x42: OP_SET ( 4, BIT_2 ); break; /* SET 2 */
case 0x43: OP_BBS ( 5, BIT_2 ); break; /* BBS 2 */
case 0x44: OP_EOR ( 3, DP ); break; /* EOR dp */
case 0x45: OP_EOR ( 4, ABS ); break; /* EOR abs */
case 0x46: OP_EOR ( 3, XI ); break; /* EOR xi */
case 0x47: OP_EOR ( 6, DXI ); break; /* EOR dxi */
case 0x48: OP_EOR ( 2, IMM ); break; /* EOR imm */
case 0x49: OP_EORM ( 6, DP, DP ); break; /* EOR dp, dp */
case 0x4a: OP_AND1 ( 5 ); break; /* AND1 bit */
case 0x4b: OP_LSRM ( 4, DP ); break; /* LSR dp */
case 0x4c: OP_LSRM ( 5, ABS ); break; /* LSR abs */
case 0x4d: OP_PUSH ( 4, REG_X ); break; /* PUSH x */
case 0x4e: OP_TCLR1 ( 6, ABS ); break; /* TCLR1 abs */
case 0x4f: OP_PCALL ( 6 ); break; /* PCALL */
case 0x50: OP_BCC ( 2, COND_VC() ); break; /* BVC */
case 0x51: OP_TCALL ( 8, 5 ); break; /* TCALL 5 */
case 0x52: OP_CLR ( 4, BIT_2 ); break; /* CLR 2 */
case 0x53: OP_BBC ( 5, BIT_2 ); break; /* BBC 2 */
case 0x54: OP_EOR ( 4, DPX ); break; /* EOR dpx */
case 0x55: OP_EOR ( 5, ABX ); break; /* EOR abx */
case 0x56: OP_EOR ( 5, ABY ); break; /* EOR aby */
case 0x57: OP_EOR ( 6, DIY ); break; /* EOR diy */
case 0x58: OP_EORM ( 5, IMM, DP ); break; /* EOR dp, imm */
case 0x59: OP_EORM ( 5, YI , XI ); break; /* EOR xi, yi */
case 0x5a: OP_CMPW ( 4, DP ); break; /* CMPW dp */
case 0x5b: OP_LSRM ( 5, DPX ); break; /* LSR dpx */
case 0x5c: OP_LSR ( 2 ); break; /* LSR */
case 0x5d: OP_MOVRR ( 2, REG_A, REG_X ); break; /* MOV X, A */
case 0x5e: OP_CMPR ( 4, REG_Y, ABS ); break; /* CMP Y, abs */
case 0x5f: OP_JMP ( 3, ABS ); break; /* JMP abs */
case 0x60: OP_CLRC ( 2 ); break; /* CLRC */
case 0x61: OP_TCALL ( 8, 6 ); break; /* TCALL 6 */
case 0x62: OP_SET ( 4, BIT_3 ); break; /* SET 3 */
case 0x63: OP_BBS ( 5, BIT_3 ); break; /* BBS 3 */
case 0x64: OP_CMPR ( 3, REG_A, DP ); break; /* CMP A, dp */
case 0x65: OP_CMPR ( 4, REG_A, ABS ); break; /* CMP A, abs */
case 0x66: OP_CMPR ( 3, REG_A, XI ); break; /* CMP A, xi */
case 0x67: OP_CMPR ( 6, REG_A, DXI ); break; /* CMP A, dxi */
case 0x68: OP_CMPR ( 2, REG_A, IMM ); break; /* CMP A, imm */
case 0x69: OP_CMPM ( 6, DP, DP ); break; /* CMP dp, dp */
case 0x6a: OP_ANDN1 ( 4 ); break; /* AND1 !bit */
case 0x6b: OP_RORM ( 4, DP ); break; /* ROR dp */
case 0x6c: OP_RORM ( 5, ABS ); break; /* ROR abs */
case 0x6d: OP_PUSH ( 4, REG_Y ); break; /* PUSH Y */
case 0x6e: OP_DBNZM ( 5 ); break; /* DBNZ dp */
case 0x6f: OP_RET ( 5 ); break; /* RET */
case 0x70: OP_BCC ( 2, COND_VS() ); break; /* BVS */
case 0x71: OP_TCALL ( 8, 7 ); break; /* TCALL 7 */
case 0x72: OP_CLR ( 4, BIT_3 ); break; /* CLR 3 */
case 0x73: OP_BBC ( 5, BIT_3 ); break; /* BBC 3 */
case 0x74: OP_CMPR ( 4, REG_A, DPX ); break; /* CMP A, dpx */
case 0x75: OP_CMPR ( 5, REG_A, ABX ); break; /* CMP A, abx */
case 0x76: OP_CMPR ( 5, REG_A, ABY ); break; /* CMP A, aby */
case 0x77: OP_CMPR ( 6, REG_A, DIY ); break; /* CMP A, diy */
case 0x78: OP_CMPM ( 5, IMM, DP ); break; /* CMP dp, imm */
case 0x79: OP_CMPM ( 5, YI, XI ); break; /* CMP xi, yi */
case 0x7a: OP_ADDW ( 5 ); break; /* ADDW di */
case 0x7b: OP_RORM ( 5, DPX ); break; /* ROR dpx */
case 0x7c: OP_ROR ( 2 ); break; /* ROR A */
case 0x7d: OP_MOVRR ( 2, REG_X, REG_A ); break; /* MOV A, X */
case 0x7e: OP_CMPR ( 3, REG_Y, DP ); break; /* CMP Y, dp */
case 0x7f: OP_RETI ( 6 ); break; /* RETI */
case 0x80: OP_SETC ( 2 ); break; /* SETC */
case 0x81: OP_TCALL ( 8, 8 ); break; /* TCALL 8 */
case 0x82: OP_SET ( 4, BIT_4 ); break; /* SET 4 */
case 0x83: OP_BBS ( 5, BIT_4 ); break; /* BBS 4 */
case 0x84: OP_ADC ( 3, DP ); break; /* ADC dp */
case 0x85: OP_ADC ( 4, ABS ); break; /* ADC abs */
case 0x86: OP_ADC ( 3, XI ); break; /* ADC xi */
case 0x87: OP_ADC ( 6, DXI ); break; /* ADC dxi */
case 0x88: OP_ADC ( 2, IMM ); break; /* ADC imm */
case 0x89: OP_ADCM ( 6, DP, DP ); break; /* ADC dp, dp */
case 0x8a: OP_EOR1 ( 4 ); break; /* EOR1 bit */
case 0x8b: OP_DECM ( 4, DP ); break; /* DEC dp */
case 0x8c: OP_DECM ( 5, ABS ); break; /* DEC abs */
case 0x8d: OP_MOVMR ( 2, IMM, REG_Y ); break; /* MOV Y, imm */
case 0x8e: OP_PLP ( 4 ); break; /* POP PSW */
case 0x8f: OP_MOVMM ( 5, IMM, DP ); break; /* MOV dp, imm */
case 0x90: OP_BCC ( 2, COND_CC() ); break; /* BCC */
case 0x91: OP_TCALL ( 8, 9 ); break; /* TCALL 9 */
case 0x92: OP_CLR ( 4, BIT_4 ); break; /* CLR 4 */
case 0x93: OP_BBC ( 5, BIT_4 ); break; /* BBC 4 */
case 0x94: OP_ADC ( 4, DPX ); break; /* ADC dpx */
case 0x95: OP_ADC ( 5, ABX ); break; /* ADC abx */
case 0x96: OP_ADC ( 5, ABY ); break; /* ADC aby */
case 0x97: OP_ADC ( 6, DIY ); break; /* ADC diy */
case 0x98: OP_ADCM ( 5, IMM, DP ); break; /* ADC dp, imm */
case 0x99: OP_ADCM ( 5, YI, XI ); break; /* ADC xi, yi */
case 0x9a: OP_SUBW ( 5 ); break; /* SUBW dp */
case 0x9b: OP_DECM ( 5, DPX ); break; /* DEC dpx */
case 0x9c: OP_DECR ( 2, REG_A ); break; /* DEC A */
case 0x9d: OP_MOVSX ( 2 ); break; /* MOV X, SP */
case 0x9e: OP_DIV (12 ); break; /* DIV YA, X */
case 0x9f: OP_XCN ( 5 ); break; /* XCN A */
case 0xa0: OP_EI ( 3 ); break; /* EI */
case 0xa1: OP_TCALL ( 8, 10 ); break; /* TCALL 10 */
case 0xa2: OP_SET ( 4, BIT_5 ); break; /* SET 5 */
case 0xa3: OP_BBS ( 5, BIT_5 ); break; /* BBS 5 */
case 0xa4: OP_SBC ( 3, DP ); break; /* SBC dp */
case 0xa5: OP_SBC ( 4, ABS ); break; /* SBC abs */
case 0xa6: OP_SBC ( 3, XI ); break; /* SBC xi */
case 0xa7: OP_SBC ( 6, DXI ); break; /* SBC dxi */
case 0xa8: OP_SBC ( 2, IMM ); break; /* SBC imm */
case 0xa9: OP_SBCM ( 6, DP, DP ); break; /* SBC dp, dp */
case 0xaa: OP_MOV1C ( 4 ); break; /* MOV1 bit->C */
case 0xab: OP_INCM ( 4, DP ); break; /* INC dp */
case 0xac: OP_INCM ( 5, ABS ); break; /* INC abs */
case 0xad: OP_CMPR ( 2, REG_Y, IMM ); break; /* CMP Y, imm */
case 0xae: OP_PULL ( 4, REG_A ); break; /* POP A */
case 0xaf: OP_MOVRM ( 4, REG_A, XII ); break; /* MOV xii, A */
case 0xb0: OP_BCC ( 2, COND_CS() ); break; /* BCS */
case 0xb1: OP_TCALL ( 8, 11 ); break; /* TCALL 11 */
case 0xb2: OP_CLR ( 4, BIT_5 ); break; /* CLR 5 */
case 0xb3: OP_BBC ( 5, BIT_5 ); break; /* BBC 5 */
case 0xb4: OP_SBC ( 4, DPX ); break; /* SBC dpx */
case 0xb5: OP_SBC ( 5, ABX ); break; /* SBC abx */
case 0xb6: OP_SBC ( 5, ABY ); break; /* SBC aby */
case 0xb7: OP_SBC ( 6, DIY ); break; /* SBC diy */
case 0xb8: OP_SBCM ( 5, IMM, DP ); break; /* SBC dp, imm */
case 0xb9: OP_SBCM ( 5, YI, XI ); break; /* SBC xi, yi */
case 0xba: OP_MOVWMR( 5 ); break; /* MOVW YA, dp */
case 0xbb: OP_INCM ( 5, DPX ); break; /* INC dpx */
case 0xbc: OP_INCR ( 2, REG_A ); break; /* INC A */
case 0xbd: OP_MOVXS ( 2 ); break; /* MOV SP, X */
case 0xbe: OP_DAS ( 3 ); break; /* DAS A */
case 0xbf: OP_MOVMR ( 4, XII, REG_A ); break; /* MOV A, xii */
case 0xc0: OP_DI ( 3 ); break; /* DI */
case 0xc1: OP_TCALL ( 8, 12 ); break; /* TCALL 12 */
case 0xc2: OP_SET ( 4, BIT_6 ); break; /* SET 6 */
case 0xc3: OP_BBS ( 5, BIT_6 ); break; /* BBS 6 */
case 0xc4: OP_MOVRM ( 4, REG_A, DP ); break; /* MOV dp, A */
case 0xc5: OP_MOVRM ( 5, REG_A, ABS ); break; /* MOV abs, A */
case 0xc6: OP_MOVRM ( 4, REG_A, XI ); break; /* MOV xi, A */
case 0xc7: OP_MOVRM ( 7, REG_A, DXI ); break; /* MOV dxi, A */
case 0xc8: OP_CMPR ( 2, REG_X, IMM ); break; /* CMP X, imm */
case 0xc9: OP_MOVRM ( 5, REG_X, ABS ); break; /* MOV abs, X */
case 0xca: OP_MOV1M ( 6 ); break; /* MOV1 C->bit */
case 0xcb: OP_MOVRM ( 4, REG_Y, DP ); break; /* MOV dp, Y */
case 0xcc: OP_MOVRM ( 5, REG_Y, ABS ); break; /* MOV abs, Y */
case 0xcd: OP_MOVMR ( 2, IMM, REG_X ); break; /* MOV X, imm */
case 0xce: OP_PULL ( 4, REG_X ); break; /* POP X */
case 0xcf: OP_MUL ( 9 ); break; /* MUL YA */
case 0xd0: OP_BCC ( 2, COND_NE() ); break; /* BNE */
case 0xd1: OP_TCALL ( 8, 13 ); break; /* TCALL 13 */
case 0xd2: OP_CLR ( 4, BIT_6 ); break; /* CLR 6 */
case 0xd3: OP_BBC ( 5, BIT_6 ); break; /* BBC 6 */
case 0xd4: OP_MOVRM ( 5, REG_A, DPX ); break; /* MOV dpx, A */
case 0xd5: OP_MOVRM ( 6, REG_A, ABX ); break; /* MOV abx, A */
case 0xd6: OP_MOVRM ( 6, REG_A, ABY ); break; /* MOV aby, A */
case 0xd7: OP_MOVRM ( 7, REG_A, DIY ); break; /* MOV diy, A */
case 0xd8: OP_MOVRM ( 4, REG_X, DP ); break; /* MOV dp, X */
case 0xd9: OP_MOVRM ( 5, REG_X, DPY ); break; /* MOV dpy, X */
case 0xda: OP_MOVWRM( 5 ); break; /* MOVW dp, YA */
case 0xdb: OP_MOVRM ( 5, REG_Y, DPX ); break; /* MOV dpx, Y */
case 0xdc: OP_DECR ( 2, REG_Y ); break; /* DEC Y */
case 0xdd: OP_MOVRR ( 2, REG_Y, REG_A ); break; /* MOV A, Y */
case 0xde: OP_CBNE ( 6, DPX ); break; /* CBNE dpx */
case 0xdf: OP_DAA ( 3 ); break; /* DAA */
case 0xe0: OP_CLRV ( 2 ); break; /* CLRV */
case 0xe1: OP_TCALL ( 8, 14 ); break; /* TCALL 14 */
case 0xe2: OP_SET ( 4, BIT_7 ); break; /* SET 7 */
case 0xe3: OP_BBS ( 5, BIT_7 ); break; /* BBS 7 */
case 0xe4: OP_MOVMR ( 3, DP, REG_A ); break; /* MOV A, dp */
case 0xe5: OP_MOVMR ( 4, ABS, REG_A ); break; /* MOV A, abs */
case 0xe6: OP_MOVMR ( 3, XI, REG_A ); break; /* MOV A, xi */
case 0xe7: OP_MOVMR ( 6, DXI, REG_A ); break; /* MOV A, dxi */
case 0xe8: OP_MOVMR ( 2, IMM, REG_A ); break; /* CMP A, imm */
case 0xe9: OP_MOVMR ( 4, ABS, REG_X ); break; /* MOV X, abs */
case 0xea: OP_NOT1 ( 5 ); break; /* NOT1 */
case 0xeb: OP_MOVMR ( 3, DP, REG_Y ); break; /* MOV Y, dp */
case 0xec: OP_MOVMR ( 4, ABS, REG_Y ); break; /* MOV Y, abs */
case 0xed: OP_NOTC ( 3 ); break; /* NOTC */
case 0xee: OP_PULL ( 4, REG_Y ); break; /* POP Y */
case 0xef: OP_SLEEP ( 3 ); break; /* SLEEP */
case 0xf0: OP_BCC ( 2, COND_EQ() ); break; /* BEQ */
case 0xf1: OP_TCALL ( 8, 15 ); break; /* TCALL1 5 */
case 0xf2: OP_CLR ( 4, BIT_7 ); break; /* CLR 7 */
case 0xf3: OP_BBC ( 5, BIT_7 ); break; /* BBC 7 */
case 0xf4: OP_MOVMR ( 4, DPX, REG_A ); break; /* MOV A, dpx */
case 0xf5: OP_MOVMR ( 5, ABX, REG_A ); break; /* MOV A, abx */
case 0xf6: OP_MOVMR ( 5, ABY, REG_A ); break; /* MOV A, aby */
case 0xf7: OP_MOVMR ( 6, DIY, REG_A ); break; /* MOV A, diy */
case 0xf8: OP_MOVMR ( 3, DP, REG_X ); break; /* MOV X, dp */
case 0xf9: OP_MOVMR ( 4, DPY, REG_X ); break; /* MOV X, dpy */
case 0xfa: OP_MOVMM ( 5, DP, DP ); break; /* MOV dp, dp */
case 0xfb: OP_MOVMR ( 4, DPX, REG_Y ); break; /* MOV Y, DPX */
case 0xfc: OP_INCR ( 2, REG_Y ); break; /* INC Y */
case 0xfd: OP_MOVRR ( 2, REG_A, REG_Y ); break; /* MOV Y, A */
case 0xfe: OP_DBNZR ( 4 ); break; /* DBNZ Y */
case 0xff: OP_STOP ( 3 ); break; /* STOP */
}
}
}
/**************************************************************************
* Generic set_info
**************************************************************************/
static CPU_SET_INFO( spc700 )
{
spc700i_cpu *cpustate = get_safe_token(device);
switch (state)
{
/* --- the following bits of info are set as 64-bit signed integers --- */
case CPUINFO_INT_INPUT_STATE + 0: spc700_set_irq_line(cpustate, 0, info->i); break;
case CPUINFO_INT_INPUT_STATE + INPUT_LINE_NMI: spc700_set_nmi_line(cpustate, info->i); break;
case CPUINFO_INT_PC:
case CPUINFO_INT_REGISTER + SPC700_PC: REG_PC = MAKE_UINT_16(info->i); break;
case CPUINFO_INT_SP:
case CPUINFO_INT_REGISTER + SPC700_S: REG_S = MAKE_UINT_8(info->i); break;
case CPUINFO_INT_REGISTER + SPC700_P: SET_REG_P(cpustate, info->i); break;
case CPUINFO_INT_REGISTER + SPC700_A: REG_A = MAKE_UINT_8(info->i); break;
case CPUINFO_INT_REGISTER + SPC700_X: REG_X = MAKE_UINT_8(info->i); break;
case CPUINFO_INT_REGISTER + SPC700_Y: REG_Y = MAKE_UINT_8(info->i); break;
}
}
/**************************************************************************
* Generic get_info
**************************************************************************/
CPU_GET_INFO( spc700 )
{
spc700i_cpu *cpustate = (device != NULL && device->token() != NULL) ? get_safe_token(device) : NULL;
uint p = 0;
if (cpustate != NULL)
{
p = ((cpustate->flag_n & 0x80) |
((cpustate->flag_v & 0x80) >> 1) |
cpustate->flag_p>>3 |
cpustate->flag_b |
(cpustate->flag_h & HFLAG_SET) |
cpustate->flag_i |
((!cpustate->flag_z) << 1) |
((cpustate->flag_c >> 8)&1));
}
switch (state)
{
/* --- the following bits of info are returned as 64-bit signed integers --- */
case CPUINFO_INT_CONTEXT_SIZE: info->i = sizeof(spc700i_cpu); break;
case CPUINFO_INT_INPUT_LINES: info->i = 1; break;
case CPUINFO_INT_DEFAULT_IRQ_VECTOR: info->i = 0; break;
case DEVINFO_INT_ENDIANNESS: info->i = ENDIANNESS_LITTLE; break;
case CPUINFO_INT_CLOCK_MULTIPLIER: info->i = 1; break;
case CPUINFO_INT_CLOCK_DIVIDER: info->i = 1; break;
case CPUINFO_INT_MIN_INSTRUCTION_BYTES: info->i = 1; break;
case CPUINFO_INT_MAX_INSTRUCTION_BYTES: info->i = 3; break;
case CPUINFO_INT_MIN_CYCLES: info->i = 2; break;
case CPUINFO_INT_MAX_CYCLES: info->i = 8; break;
case DEVINFO_INT_DATABUS_WIDTH + ADDRESS_SPACE_PROGRAM: info->i = 8; break;
case DEVINFO_INT_ADDRBUS_WIDTH + ADDRESS_SPACE_PROGRAM: info->i = 16; break;
case DEVINFO_INT_ADDRBUS_SHIFT + ADDRESS_SPACE_PROGRAM: info->i = 0; break;
case DEVINFO_INT_DATABUS_WIDTH + ADDRESS_SPACE_DATA: info->i = 0; break;
case DEVINFO_INT_ADDRBUS_WIDTH + ADDRESS_SPACE_DATA: info->i = 0; break;
case DEVINFO_INT_ADDRBUS_SHIFT + ADDRESS_SPACE_DATA: info->i = 0; break;
case DEVINFO_INT_DATABUS_WIDTH + ADDRESS_SPACE_IO: info->i = 0; break;
case DEVINFO_INT_ADDRBUS_WIDTH + ADDRESS_SPACE_IO: info->i = 0; break;
case DEVINFO_INT_ADDRBUS_SHIFT + ADDRESS_SPACE_IO: info->i = 0; break;
case CPUINFO_INT_INPUT_STATE + 0: info->i = (LINE_IRQ == IRQ_SET) ? ASSERT_LINE : CLEAR_LINE; break;
case CPUINFO_INT_PREVIOUSPC: info->i = REG_PPC; break;
case CPUINFO_INT_PC:
case CPUINFO_INT_REGISTER + SPC700_PC: info->i = REG_PC; break;
case CPUINFO_INT_SP:
case CPUINFO_INT_REGISTER + SPC700_S: info->i = REG_S + STACK_PAGE; break;
case CPUINFO_INT_REGISTER + SPC700_P: info->i = GET_REG_P(); break;
case CPUINFO_INT_REGISTER + SPC700_A: info->i = REG_A; break;
case CPUINFO_INT_REGISTER + SPC700_X: info->i = REG_X; break;
case CPUINFO_INT_REGISTER + SPC700_Y: info->i = REG_Y; break;
/* --- the following bits of info are returned as pointers to data or functions --- */
case CPUINFO_FCT_SET_INFO: info->setinfo = CPU_SET_INFO_NAME(spc700); break;
case CPUINFO_FCT_INIT: info->init = CPU_INIT_NAME(spc700); break;
case CPUINFO_FCT_RESET: info->reset = CPU_RESET_NAME(spc700); break;
case CPUINFO_FCT_EXIT: info->exit = CPU_EXIT_NAME(spc700); break;
case CPUINFO_FCT_EXECUTE: info->execute = CPU_EXECUTE_NAME(spc700); break;
case CPUINFO_FCT_BURN: info->burn = NULL; break;
case CPUINFO_FCT_DISASSEMBLE: info->disassemble = CPU_DISASSEMBLE_NAME(spc700); break;
case CPUINFO_PTR_INSTRUCTION_COUNTER: info->icount = &cpustate->ICount; break;
/* --- the following bits of info are returned as NULL-terminated strings --- */
case DEVINFO_STR_NAME: strcpy(info->s, "SPC700"); break;
case DEVINFO_STR_FAMILY: strcpy(info->s, "Sony SPC700"); break;
case DEVINFO_STR_VERSION: strcpy(info->s, "1.1"); break;
case DEVINFO_STR_SOURCE_FILE: strcpy(info->s, __FILE__); break;
case DEVINFO_STR_CREDITS: strcpy(info->s, "Copyright Nicola Salmoria and the MAME team, all rights reserved."); break;
case CPUINFO_STR_FLAGS:
sprintf(info->s, "%c%c%c%c%c%c%c%c",
p & 0x80 ? 'N':'.',
p & 0x40 ? 'V':'.',
p & 0x20 ? 'P':'.',
p & 0x10 ? 'B':'.',
p & 0x08 ? 'H':'.',
p & 0x04 ? 'I':'.',
p & 0x02 ? 'Z':'.',
p & 0x01 ? 'C':'.');
break;
case CPUINFO_STR_REGISTER + SPC700_PC: sprintf(info->s, "PC:%04X", cpustate->pc); break;
case CPUINFO_STR_REGISTER + SPC700_S: sprintf(info->s, "S:%02X", cpustate->s); break;
case CPUINFO_STR_REGISTER + SPC700_P: sprintf(info->s, "P:%02X", p); break;
case CPUINFO_STR_REGISTER + SPC700_A: sprintf(info->s, "A:%02X", cpustate->a); break;
case CPUINFO_STR_REGISTER + SPC700_X: sprintf(info->s, "X:%02X", cpustate->x); break;
case CPUINFO_STR_REGISTER + SPC700_Y: sprintf(info->s, "Y:%02X", cpustate->y); break;
}
}
DEFINE_LEGACY_CPU_DEVICE(SPC700, spc700);
/* ======================================================================== */
/* ============================== END OF FILE ============================= */
/* ======================================================================== */
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