path: root/opcode.h

#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

#define OPNAME(opcode) [opcode] = #opcode /* Get name of Opcode, for dissambly. */
#define CPS 0x00 /* Clear Processor Status. */
#define ADC 0x01 /* ADd with Carry. */
#define PHP 0x08 /* PusH Processor status to stack. */
#define PHA 0x09 /* PusH Accumulator to stack. */
#define PHY 0x0A /* PusH Y register to stack. */
#define PHX 0x0C /* PusH X register to stack. */
#define JMP 0x10 /* JuMP to memory location. */
#define SBC 0x11 /* SuBtract with Carry. */
#define PLP 0x18 /* PuLl Processor status from stack. */
#define PLA 0x19 /* PuLl Accumulator from stack. */
#define PLY 0x1A /* PuLl Y register from stack. */
#define PLX 0x1C /* PuLl X register from stack. */
#define JSR 0x20 /* Jump to SubRoutine. */
#define AND 0x21 /* bitwise AND with accumulator. */
#define ANY 0x22 /* bitwise ANd with Y register.*/
#define AAY 0x23 /* bitwise And with Accumulator, and Y register. */
#define ANX 0x24 /* bitwise ANd with X register. */
#define AAX 0x25 /* bitwise And with Accumulator, and X register. */
#define STT 0x28 /* STart Threads. */
#define BPO 0x30 /* Branch if POsitive. */
#define ORA 0x31 /* bitwise OR with Accumulator. */
#define ORY 0x32 /* bitwise OR with Y register. */
#define OAY 0x33 /* bitwise Or with Accumulator, and Y register. */
#define ORX 0x34 /* bitwise OR with X register. */
#define OAX 0x35 /* bitwise Or with Accumulator, and X register. */
#define SEI 0x38 /* SEt Interupt flag. */
#define BNG 0x40 /* Branch if NeGative. */
#define XOR 0x41 /* bitwise XOR with accumulator. */
#define XRY 0x42 /* bitwise XoR with Y register. */
#define XAY 0x43 /* bitwise Xor with Accumulator, and Y register. */
#define XRX 0x44 /* bitwise XoR with X register. */
#define XAX 0x45 /* bitwise Xor with Accumulator, and X register. */
#define CLI 0x48 /* CLear Interupt flag. */
#define BCS 0x50 /* Branch if Carry Set. */
#define LSL 0x51 /* Logical Shift Left. */
#define SEC 0x58 /* SEt Carry flag. */
#define STA 0x5B /* STore Accumulator. */
#define STY 0x5D /* STore Y register. */
#define STX 0x5E /* STore X register. */
#define BCC 0x60 /* Branch if Carry Clear. */
#define LSR 0x61 /* Logical Shift Right. */
#define CLC 0x68 /* CLear Carry flag. */
#define LDA 0x69 /* LoaD Accumulator. */
#define LDY 0x6A /* LoaD Y register. */
#define LDX 0x6C /* LoaD X register. */
#define BEQ 0x70 /* Branch if EQual. */
#define ROL 0x71 /* ROtate Left. */
#define SSP 0x78 /* Set Stack Protection flag. */
#define BNE 0x80 /* Branch if Not Equal. */
#define ROR 0x81 /* ROtate Right. */
#define CSP 0x88 /* Clear Stack Protection flag. */
#define BVS 0x90 /* Branch if oVerflow Set. */
#define MUL 0x91 /* MULtiply with accumulator. */
#define SEV 0x98 /* SEt oVerflow flag. */
#define BVC 0xA0 /* Branch if oVerflow Clear. */
#define DIV 0xA1 /* DIVide with accumulator. */
#define CLV 0xA8 /* CLear oVerflow flag. */
#define RTS 0xB0 /* ReTurn from Subroutine. */
#define CMP 0xB1 /* CoMPare accumulator. */
#define CPY 0xB2 /* ComPare Y register. */
#define CAY 0xB3 /* Compare Accumulator, and Y register. */
#define CPX 0xB4 /* ComPare X register. */
#define CAX 0xB5 /* Compare Accumulator, and X register. */
#define ENT 0xB8 /* ENd Threads. */
#define RTI 0xC0 /* ReTurn from Interupt. */
#define INC 0xC1 /* INCrement accumulator. */
#define INY 0xC2 /* INcrement Y register. */
#define IAY 0xC3 /* Increment Accumulator, and Y register. */
#define INX 0xC4 /* INcrement X register. */
#define IAX 0xC5 /* Increment Accumulator, and X register. */
#define DEC 0xD1 /* DECrement accumulator. */
#define DEY 0xD2 /* DEcrement Y register. */
#define DAY 0xD3 /* Decrement Accumulator, and Y register. */
#define DEX 0xD4 /* DEcrement X register. */
#define DAX 0xD5 /* Decrement Accumulator, and X register. */
#define NOP 0xE8 /* No OPeration. */
#define BRK 0xF8 /* BReaK. */

#define C ((uint64_t)1 << 0)
#define Z ((uint64_t)1 << 1)
#define I ((uint64_t)1 << 2)
#define S ((uint64_t)1 << 3)
#define V ((uint64_t)1 << 6)
#define N ((uint64_t)1 << 7)

#define STK_STADDR 0x010000 /* Starting address of the stack. */

struct sux;

uint8_t *addr; /* Address Space. */

struct sux {
	uint64_t ps; /* The processor status register. */
	uint64_t a[8], y[8], x[8]; /* Registers A, X, and Y. */
	uint64_t pc[8]; /* Program counter. */
	uint16_t sp; /* Stack pointer. */
	uint8_t crt; /* Current running threads. */
	uint8_t c[8], z[8], i[8], s[8], v[8], n[8]; /* Processor Status Flags. */

};

static const char *opname[0x100] = {
	OPNAME(CPS),
	[ADC] = "ADC #",
	[0x03] = "ADC a",
	[0x05] = "ADC zm",
	OPNAME(PHP),
	OPNAME(PHA),
	OPNAME(PHY),
	OPNAME(PHX),
	OPNAME(JMP),
	[SBC] = "SBC #",
	[0x13] = "SBC a",
	[0x15] = "SBC zm",
	OPNAME(PLP),
	OPNAME(PLA),
	OPNAME(PLY),
	OPNAME(PLX),
	OPNAME(JSR),
	[AND] = "AND #",
	[ANY] = "ANY #",
	OPNAME(AAY),
	[ANX] = "ANX #",
	OPNAME(AAX),
	OPNAME(STT),
	[0x29] = "AND a",
	[0x2B] = "AND zm",
	OPNAME(BPO),
	[ORA] = "ORA #",
	[ORY] = "ORY #",
	OPNAME(OAY),
	[ORX] = "ORX #",
	OPNAME(OAX),
	OPNAME(SEI),
	[0x39] = "ORA a",
	[0x3B] = "ORA zm",
	OPNAME(BNG),
	[XOR] = "XOR #",
	[XRY] = "XRY #",
	OPNAME(XAY),
	[XRX] = "XRX #",
	OPNAME(XAX),
	OPNAME(CLI),
	[0x49] = "XOR a",
	[0x4B] = "XOR zm",
	OPNAME(BCS),
	[LSL] = "LSL #",
	[0x52] = "ANY a",
	[0x53] = "LSL a",
	[0x54] = "ANX a",
	[0x55] = "LSL zm",
	OPNAME(SEC),
	[0x59] = "LDA a",
	[0x5A] = "LDY a",
	[STA] = "STA a",
	[0x5C] = "LDX a",
	[STY] = "STY a",
	[STX] = "STX a",
	OPNAME(BCC),
	[LSR] = "LSR #",
	[0x62] = "ORY a",
	[0x63] = "LSR a",
	[0x64] = "ORX a",
	[0x65] = "LSR zm",
	OPNAME(CLC),
	[LDA]= "LDA #",
	[LDY]= "LDY #",
	[LDX]= "LDX #",
	OPNAME(BEQ),
	[ROL] = "ROL #",
	[0x72] = "XRY a",
	[0x73] = "ROL a",
	[0x74] = "XRX a",
	[0x75] = "ROL zm",
	OPNAME(SSP),
	[0x79] = "LDA zm",
	[0x7A] = "LDY zm",
	[0x7B] = "STA zm",
	[0x7C] = "LDX zm",
	[0x7D] = "STY zm",
	[0x7E] = "STX zm",
	OPNAME(BNE),
	[ROR] = "ROR #",
	[0x82] = "ANY zm",
	[0x83] = "ROR a",
	[0x84] = "ANX zm",
	[0x85] = "ROR zm",
	OPNAME(CSP),
	[0x89] = "LDA zm, x",
	[0x8A] = "LDY zm, x",
	[0x8B] = "STA zm, x",
	[0x8D] = "STY zm, x",
	OPNAME(BVS),
	[MUL] = "MUL #",
	[0x92] = "ORY zm",
	[0x93] = "MUL a",
	[0x94] = "ORX zm",
	[0x95] = "MUL zm",
	OPNAME(SEV),
	[0x99] = "LDA zm, y",
	[0x9B] = "LDX zm, y",
	[0x9C] = "STA zm, y",
	[0x9E] = "STX zm, y",
	OPNAME(BVC),
	[DIV] = "DIV #",
	[0xA2] = "XRY zm",
	[0xA3] = "DIV a",
	[0xA4] = "XRX zm",
	[0xA5] = "DIV zm",
	OPNAME(CLV),
	OPNAME(RTS),
	[CMP] = "CMP #",
	[CPY] = "CPY #",
	OPNAME(CAY),
	[CPX] = "CPX #",
	OPNAME(CAX),
	OPNAME(ENT),
	OPNAME(RTI),
	[INC] = "INC A",
	OPNAME(INY),
	OPNAME(IAY),
	OPNAME(INX),
	OPNAME(IAX),
	[DEC] = "DEC A",
	OPNAME(DEY),
	OPNAME(DAY),
	OPNAME(DEX),
	OPNAME(DAX),
	[0xE1] = "INC a",
	[0xE2] = "CPY a",
	[0xE3] = "INC zm",
	[0xE4] = "CPX a",
	[0xE5] = "CMP a",
	OPNAME(NOP),
	[0xF1] = "DEC a",
	[0xF2] = "CPY zm",
	[0xF3] = "DEC zm",
	[0xF4] = "CPX zm",
	[0xF4] = "CMP zm",
	OPNAME(BRK),
};

extern void adc(struct sux *cpu, uint64_t adr, uint8_t thread);
extern void sbc(struct sux *cpu, uint64_t adr, uint8_t thread);
extern void mul(struct sux *cpu, uint64_t adr, uint8_t thread);
extern void divd(struct sux *cpu, uint64_t adr, uint8_t thread);
extern uint64_t and(struct sux *cpu, uint64_t value, uint8_t thread);
extern void and_addr(struct sux *cpu, uint64_t* const reg, uint64_t adr, uint8_t thread);
extern uint64_t or(struct sux *cpu, uint64_t value, uint8_t thread);
extern void or_addr(struct sux *cpu, uint64_t* const reg, uint64_t adr, uint8_t thread);
extern uint64_t xor(struct sux *cpu, uint64_t value, uint8_t thread);
extern void xor_addr(struct sux *cpu, uint64_t* const reg, uint64_t adr, uint8_t thread);
extern void rol(struct sux *cpu, uint64_t adr, uint8_t thread);
extern void ror(struct sux *cpu, uint64_t adr, uint8_t thread);
extern void lsl(struct sux *cpu, uint64_t adr, uint8_t thread);
extern void lsr(struct sux *cpu, uint64_t adr, uint8_t thread);
extern void inc(struct sux *cpu, uint64_t *reg, uint8_t thread);
extern void inc_addr(struct sux *cpu, uint64_t adr, uint8_t thread);
extern void dec(struct sux *cpu, uint64_t *reg, uint8_t thread);
extern void dec_addr(struct sux *cpu, uint64_t adr, uint8_t thread);
extern void stt(struct sux *cpu, uint8_t value);
extern void ent(struct sux *cpu, uint8_t value);
extern void ld(struct sux *cpu, uint64_t *reg, uint64_t adr, uint8_t thread);
extern void st(struct sux *cpu, uint64_t *reg, uint64_t adr, uint8_t thread);
extern void push(struct sux *cpu, uint8_t value);
extern uint8_t pull(struct sux *cpu);
extern void cmp_addr(struct sux *cpu, uint64_t reg, uint64_t adr, uint8_t thread);
extern void cmp(struct sux *cpu, uint64_t reg1, uint64_t reg2, uint8_t thread);
extern void bfs(struct sux *cpu, uint8_t flag, uint64_t adr, uint8_t thread);
extern void bfc(struct sux *cpu, uint8_t flag, uint64_t adr, uint8_t thread);
extern void setps(struct sux *cpu, uint8_t thread);
extern uint64_t immaddr(struct sux *cpu, uint8_t thread, uint8_t size);
extern uint64_t absaddr(struct sux *cpu, uint8_t thread);
extern uint32_t zeromtx(struct sux *cpu, uint8_t thread);
extern uint32_t zeromx(struct sux *cpu, uint8_t thread);
extern uint32_t zeromy(struct sux *cpu, uint8_t thread);