#include "debugger.h" #include "sh2.h" #define SIGNX8(x) (((INT32)(x) << 24) >> 24) #define SIGNX12(x) (((INT32)(x) << 20) >> 20) #define Rn ((opcode >> 8) & 15) #define Rm ((opcode >> 4) & 15) static const char *const regname[16] = { "R0", "R1", "R2", "R3", "R4", "R5", "R6", "R7", "R8", "R9", "R10","R11","R12","R13","R14","SP" }; static UINT32 op0000(char *buffer, UINT32 pc, UINT16 opcode) { UINT32 flags = 0; switch(opcode & 0x3f) { case 0x02: sprintf(buffer,"STC SR,%s", regname[Rn]); break; case 0x03: sprintf(buffer,"BSRF %s", regname[Rn]); break; case 0x08: sprintf(buffer,"CLRT"); break; case 0x09: sprintf(buffer,"NOP"); break; case 0x0A: sprintf(buffer,"STS MACH,%s", regname[Rn]); break; case 0x0B: sprintf(buffer,"RTS"); flags = DASMFLAG_STEP_OUT; break; case 0x12: sprintf(buffer,"STS GBR,%s", regname[Rn]); break; case 0x18: sprintf(buffer,"SETT"); break; case 0x19: sprintf(buffer,"DIV0U"); break; case 0x1A: sprintf(buffer,"STS MACL,%s", regname[Rn]); break; case 0x1B: sprintf(buffer,"SLEEP"); break; case 0x22: sprintf(buffer,"STC VBR,%s", regname[Rn]); break; case 0x23: sprintf(buffer,"BRAF %s", regname[Rn]); break; case 0x28: sprintf(buffer,"CLRMAC"); break; case 0x29: sprintf(buffer,"MOVT %s", regname[Rn]); break; case 0x2A: sprintf(buffer,"STS PR,%s", regname[Rn]); break; case 0x2B: sprintf(buffer,"RTE"); flags = DASMFLAG_STEP_OUT; break; default: switch(opcode & 15) { case 0: sprintf(buffer, "?????? $%04X", opcode); break; case 1: sprintf(buffer, "?????? $%04X", opcode); break; case 2: sprintf(buffer, "?????? $%04X", opcode); break; case 3: sprintf(buffer, "?????? $%04X", opcode); break; case 4: sprintf(buffer, "MOV.B %s,@(R0,%s)", regname[Rm], regname[Rn]); break; case 5: sprintf(buffer, "MOV.W %s,@(R0,%s)", regname[Rm], regname[Rn]); break; case 6: sprintf(buffer, "MOV.L %s,@(R0,%s)", regname[Rm], regname[Rn]); break; case 7: sprintf(buffer, "MUL.L %s,%s", regname[Rm], regname[Rn]); break; case 8: sprintf(buffer, "?????? $%04X", opcode); break; case 9: sprintf(buffer, "?????? $%04X", opcode); break; case 10: sprintf(buffer, "?????? $%04X", opcode); break; case 11: sprintf(buffer, "?????? $%04X", opcode); break; case 12: sprintf(buffer, "MOV.B @(R0,%s),%s", regname[Rm], regname[Rn]); break; case 13: sprintf(buffer, "MOV.W @(R0,%s),%s", regname[Rm], regname[Rn]); break; case 14: sprintf(buffer, "MOV.L @(R0,%s),%s", regname[Rm], regname[Rn]); break; case 15: sprintf(buffer, "MAC.L @%s+,@%s+", regname[Rn], regname[Rm]); break; } } return flags; } static UINT32 op0001(char *buffer, UINT32 pc, UINT16 opcode) { sprintf(buffer, "MOV.L %s,@($%02X,%s)", regname[Rm], (opcode & 15) * 4, regname[Rn]); return 0; } static UINT32 op0010(char *buffer, UINT32 pc, UINT16 opcode) { switch (opcode & 15) { case 0: sprintf(buffer, "MOV.B %s,@%s", regname[Rm], regname[Rn]); break; case 1: sprintf(buffer, "MOV.W %s,@%s", regname[Rm], regname[Rn]); break; case 2: sprintf(buffer, "MOV.L %s,@%s", regname[Rm], regname[Rn]); break; case 3: sprintf(buffer, "?????? $%04X", opcode); break; case 4: sprintf(buffer, "MOV.B %s,@-%s", regname[Rm], regname[Rn]); break; case 5: sprintf(buffer, "MOV.W %s,@-%s", regname[Rm], regname[Rn]); break; case 6: sprintf(buffer, "MOV.L %s,@-%s", regname[Rm], regname[Rn]); break; case 7: sprintf(buffer, "DIV0S %s,%s", regname[Rm], regname[Rn]); break; case 8: sprintf(buffer, "TST %s,%s", regname[Rm], regname[Rn]); break; case 9: sprintf(buffer, "AND %s,%s", regname[Rm], regname[Rn]); break; case 10: sprintf(buffer, "XOR %s,%s", regname[Rm], regname[Rn]); break; case 11: sprintf(buffer, "OR %s,%s", regname[Rm], regname[Rn]); break; case 12: sprintf(buffer, "CMP/STR %s,%s", regname[Rm], regname[Rn]); break; case 13: sprintf(buffer, "XTRCT %s,%s", regname[Rm], regname[Rn]); break; case 14: sprintf(buffer, "MULU.W %s,%s", regname[Rm], regname[Rn]); break; case 15: sprintf(buffer, "MULS.W %s,%s", regname[Rm], regname[Rn]); break; } return 0; } static UINT32 op0011(char *buffer, UINT32 pc, UINT16 opcode) { switch (opcode & 15) { case 0: sprintf(buffer, "CMP/EQ %s,%s", regname[Rm], regname[Rn]); break; case 1: sprintf(buffer, "?????? %s,%s", regname[Rm], regname[Rn]); break; case 2: sprintf(buffer, "CMP/HS %s,%s", regname[Rm], regname[Rn]); break; case 3: sprintf(buffer, "CMP/GE %s,%s", regname[Rm], regname[Rn]); break; case 4: sprintf(buffer, "DIV1 %s,%s", regname[Rm], regname[Rn]); break; case 5: sprintf(buffer, "DMULU.L %s,%s", regname[Rm], regname[Rn]); break; case 6: sprintf(buffer, "CMP/HI %s,%s", regname[Rm], regname[Rn]); break; case 7: sprintf(buffer, "CMP/GT %s,%s", regname[Rm], regname[Rn]); break; case 8: sprintf(buffer, "SUB %s,%s", regname[Rm], regname[Rn]); break; case 9: sprintf(buffer, "?????? %s,%s", regname[Rm], regname[Rn]); break; case 10: sprintf(buffer, "SUBC %s,%s", regname[Rm], regname[Rn]); break; case 11: sprintf(buffer, "SUBV %s,%s", regname[Rm], regname[Rn]); break; case 12: sprintf(buffer, "ADD %s,%s", regname[Rm], regname[Rn]); break; case 13: sprintf(buffer, "DMULS.L %s,%s", regname[Rm], regname[Rn]); break; case 14: sprintf(buffer, "ADDC %s,%s", regname[Rm], regname[Rn]); break; case 15: sprintf(buffer, "ADDV %s,%s", regname[Rm], regname[Rn]); break; } return 0; } static UINT32 op0100(char *buffer, UINT32 pc, UINT16 opcode) { UINT32 flags = 0; switch(opcode & 0x3F) { case 0x00: sprintf(buffer, "SHLL %s", regname[Rn]); break; case 0x01: sprintf(buffer, "SHLR %s", regname[Rn]); break; case 0x02: sprintf(buffer, "STS.L MACH,@-%s", regname[Rn]); break; case 0x03: sprintf(buffer, "STC.L SR,@-%s", regname[Rn]); break; case 0x04: sprintf(buffer, "ROTL %s", regname[Rn]); break; case 0x05: sprintf(buffer, "ROTR %s", regname[Rn]); break; case 0x06: sprintf(buffer, "LDS.L @%s+,MACH", regname[Rn]); break; case 0x07: sprintf(buffer, "LDC.L @%s+,SR", regname[Rn]); break; case 0x08: sprintf(buffer, "SHLL2 %s", regname[Rn]); break; case 0x09: sprintf(buffer, "SHLR2 %s", regname[Rn]); break; case 0x0a: sprintf(buffer, "LDS %s,MACH", regname[Rn]); break; case 0x0b: sprintf(buffer, "JSR %s", regname[Rn]); flags = DASMFLAG_STEP_OVER | DASMFLAG_STEP_OVER_EXTRA(1); break; case 0x0e: sprintf(buffer, "LDC %s,SR", regname[Rn]); break; case 0x10: sprintf(buffer, "DT %s", regname[Rn]); break; case 0x11: sprintf(buffer, "CMP/PZ %s", regname[Rn]); break; case 0x12: sprintf(buffer, "STS.L MACL,@-%s", regname[Rn]); break; case 0x13: sprintf(buffer, "STC.L GBR,@-%s", regname[Rn]); break; case 0x15: sprintf(buffer, "CMP/PL %s", regname[Rn]); break; case 0x16: sprintf(buffer, "LDS.L @%s+,MACL", regname[Rn]); break; case 0x17: sprintf(buffer, "LDC.L @%s+,GBR", regname[Rn]); break; case 0x18: sprintf(buffer, "SHLL8 %s", regname[Rn]); break; case 0x19: sprintf(buffer, "SHLR8 %s", regname[Rn]); break; case 0x1a: sprintf(buffer, "LDS %s,MACL", regname[Rn]); break; case 0x1b: sprintf(buffer, "TAS %s", regname[Rn]); break; case 0x1e: sprintf(buffer, "LDC %s,GBR", regname[Rn]); break; case 0x20: sprintf(buffer, "SHAL %s", regname[Rn]); break; case 0x21: sprintf(buffer, "SHAR %s", regname[Rn]); break; case 0x22: sprintf(buffer, "STS.L PR,@-%s", regname[Rn]); break; case 0x23: sprintf(buffer, "STC.L VBR,@-%s", regname[Rn]); break; case 0x24: sprintf(buffer, "ROTCL %s", regname[Rn]); break; case 0x25: sprintf(buffer, "ROTCR %s", regname[Rn]); break; case 0x26: sprintf(buffer, "LDS.L @%s+,PR", regname[Rn]); break; case 0x27: sprintf(buffer, "LDC.L @%s+,VBR", regname[Rn]); break; case 0x28: sprintf(buffer, "SHLL16 %s", regname[Rn]); break; case 0x29: sprintf(buffer, "SHLR16 %s", regname[Rn]); break; case 0x2a: sprintf(buffer, "LDS %s,PR", regname[Rn]); break; case 0x2b: sprintf(buffer, "JMP %s", regname[Rn]); break; case 0x2e: sprintf(buffer, "LDC %s,VBR", regname[Rn]); break; default: if ((opcode & 15) == 15) sprintf(buffer, "MAC.W @%s+,@%s+", regname[Rm], regname[Rn]); else sprintf(buffer, "?????? $%04X", opcode); } return flags; } static UINT32 op0101(char *buffer, UINT32 pc, UINT16 opcode) { sprintf(buffer, "MOV.L @($%02X,%s),%s", (opcode & 15) * 4, regname[Rm], regname[Rn]); return 0; } static UINT32 op0110(char *buffer, UINT32 pc, UINT16 opcode) { switch(opcode & 0xF) { case 0x00: sprintf(buffer, "MOV.B @%s,%s", regname[Rm], regname[Rn]); break; case 0x01: sprintf(buffer, "MOV.W @%s,%s", regname[Rm], regname[Rn]); break; case 0x02: sprintf(buffer, "MOV.L @%s,%s", regname[Rm], regname[Rn]); break; case 0x03: sprintf(buffer, "MOV %s,%s", regname[Rm], regname[Rn]); break; case 0x04: sprintf(buffer, "MOV.B @%s+,%s", regname[Rm], regname[Rn]); break; case 0x05: sprintf(buffer, "MOV.W @%s+,%s", regname[Rm], regname[Rn]); break; case 0x06: sprintf(buffer, "MOV.L @%s+,%s", regname[Rm], regname[Rn]); break; case 0x07: sprintf(buffer, "NOT %s,%s", regname[Rm], regname[Rn]); break; case 0x08: sprintf(buffer, "SWAP.B %s,%s", regname[Rm], regname[Rn]); break; case 0x09: sprintf(buffer, "SWAP.W %s,%s", regname[Rm], regname[Rn]); break; case 0x0a: sprintf(buffer, "NEGC %s,%s", regname[Rm], regname[Rn]); break; case 0x0b: sprintf(buffer, "NEG %s,%s", regname[Rm], regname[Rn]); break; case 0x0c: sprintf(buffer, "EXTU.B %s,%s", regname[Rm], regname[Rn]); break; case 0x0d: sprintf(buffer, "EXTU.W %s,%s", regname[Rm], regname[Rn]); break; case 0x0e: sprintf(buffer, "EXTS.B %s,%s", regname[Rm], regname[Rn]); break; case 0x0f: sprintf(buffer, "EXTS.W %s,%s", regname[Rm], regname[Rn]); break; } return 0; } static UINT32 op0111(char *buffer, UINT32 pc, UINT16 opcode) { sprintf(buffer, "ADD #$%02X,%s", opcode & 0xff, regname[Rn]); return 0; } static UINT32 op1000(char *buffer, UINT32 pc, UINT16 opcode) { switch((opcode >> 8) & 15) { case 0: sprintf(buffer, "MOV.B R0,@($%02X,%s)", (opcode & 15), regname[Rm]); break; case 1: sprintf(buffer, "MOV.W R0,@($%02X,%s)", (opcode & 15) * 2, regname[Rm]); break; case 4: sprintf(buffer, "MOV.B @($%02X,%s),R0", (opcode & 15), regname[Rm]); break; case 5: sprintf(buffer, "MOV.W @($%02X,%s),R0", (opcode & 15), regname[Rm]); break; case 8: sprintf(buffer, "CMP/EQ #$%02X,R0", (opcode & 0xff)); break; case 9: sprintf(buffer, "BT $%08X", pc + SIGNX8(opcode & 0xff) * 2 + 2); break; case 11: sprintf(buffer, "BF $%08X", pc + SIGNX8(opcode & 0xff) * 2 + 2); break; case 13: sprintf(buffer, "BTS $%08X", pc + SIGNX8(opcode & 0xff) * 2 + 2); break; case 15: sprintf(buffer, "BFS $%08X", pc + SIGNX8(opcode & 0xff) * 2 + 2); break; default : sprintf(buffer, "invalid $%04X", opcode); } return 0; } static UINT32 op1001(char *buffer, UINT32 pc, UINT16 opcode) { sprintf(buffer, "MOV.W @($%04X,PC),%s", (opcode & 0xff) * 2, regname[Rn]); return 0; } static UINT32 op1010(char *buffer, UINT32 pc, UINT16 opcode) { sprintf(buffer, "BRA $%08X", SIGNX12(opcode & 0xfff) * 2 + pc + 2); return 0; } static UINT32 op1011(char *buffer, UINT32 pc, UINT16 opcode) { sprintf(buffer, "BSR $%08X", SIGNX12(opcode & 0xfff) * 2 + pc + 2); return DASMFLAG_STEP_OVER | DASMFLAG_STEP_OVER_EXTRA(1); } static UINT32 op1100(char *buffer, UINT32 pc, UINT16 opcode) { UINT32 flags = 0; switch((opcode >> 8) & 15) { case 0: sprintf(buffer, "MOV.B R0,@($%02X,GBR)", opcode & 0xff); break; case 1: sprintf(buffer, "MOV.W R0,@($%04X,GBR)", (opcode & 0xff) * 2); break; case 2: sprintf(buffer, "MOV.L R0,@($%04X,GBR)", (opcode & 0xff) * 4); break; case 3: sprintf(buffer, "TRAPA #$%02X", opcode & 0xff); flags = DASMFLAG_STEP_OVER; break; case 4: sprintf(buffer, "MOV.B @($%02X,GBR),R0", opcode & 0xff); break; case 5: sprintf(buffer, "MOV.W @($%04X,GBR),R0", (opcode & 0xff) * 2); break; case 6: sprintf(buffer, "MOV.L @($%04X,GBR),R0", (opcode & 0xff) * 4); break; case 7: sprintf(buffer, "MOVA @($%04X,PC),R0", (opcode & 0xff) * 4); break; case 8: sprintf(buffer, "TST #$%02X,R0", opcode & 0xff); break; case 9: sprintf(buffer, "AND #$%02X,R0", opcode & 0xff); break; case 10: sprintf(buffer, "XOR #$%02X,R0", opcode & 0xff); break; case 11: sprintf(buffer, "OR #$%02X,R0", opcode & 0xff); break; case 12: sprintf(buffer, "TST.B #$%02X,@(R0,GBR)", opcode & 0xff); break; case 13: sprintf(buffer, "AND.B #$%02X,@(R0,GBR)", opcode & 0xff); break; case 14: sprintf(buffer, "XOR.B #$%02X,@(R0,GBR)", opcode & 0xff); break; case 15: sprintf(buffer, "OR.B #$%02X,@(R0,GBR)", opcode & 0xff); break; } return flags; } static UINT32 op1101(char *buffer, UINT32 pc, UINT16 opcode) { sprintf(buffer, "MOV.L @($%02X,PC),%s", (opcode * 4) & 0xff, regname[Rn]); return 0; } static UINT32 op1110(char *buffer, UINT32 pc, UINT16 opcode) { sprintf(buffer, "MOV #$%02X,%s", (opcode & 0xff), regname[Rn]); return 0; } static UINT32 op1111(char *buffer, UINT32 pc, UINT16 opcode) { sprintf(buffer, "unknown $%04X", opcode); return 0; } static unsigned DasmSH2(char *buffer, unsigned pc, UINT16 opcode) { UINT32 flags; pc += 2; switch((opcode >> 12) & 15) { case 0: flags = op0000(buffer,pc,opcode); break; case 1: flags = op0001(buffer,pc,opcode); break; case 2: flags = op0010(buffer,pc,opcode); break; case 3: flags = op0011(buffer,pc,opcode); break; case 4: flags = op0100(buffer,pc,opcode); break; case 5: flags = op0101(buffer,pc,opcode); break; case 6: flags = op0110(buffer,pc,opcode); break; case 7: flags = op0111(buffer,pc,opcode); break; case 8: flags = op1000(buffer,pc,opcode); break; case 9: flags = op1001(buffer,pc,opcode); break; case 10: flags = op1010(buffer,pc,opcode); break; case 11: flags = op1011(buffer,pc,opcode); break; case 12: flags = op1100(buffer,pc,opcode); break; case 13: flags = op1101(buffer,pc,opcode); break; case 14: flags = op1110(buffer,pc,opcode); break; default: flags = op1111(buffer,pc,opcode); break; } return 2 | flags | DASMFLAG_SUPPORTED; } CPU_DISASSEMBLE( sh2 ) { return DasmSH2( buffer, pc, (oprom[0] << 8) | oprom[1] ); }