diff options
Diffstat (limited to 'src/devices/cpu/sh/sh2dasm.cpp')
-rw-r--r-- | src/devices/cpu/sh/sh2dasm.cpp | 610 |
1 files changed, 610 insertions, 0 deletions
diff --git a/src/devices/cpu/sh/sh2dasm.cpp b/src/devices/cpu/sh/sh2dasm.cpp new file mode 100644 index 00000000000..ef823ee28a5 --- /dev/null +++ b/src/devices/cpu/sh/sh2dasm.cpp @@ -0,0 +1,610 @@ +// license:BSD-3-Clause +// copyright-holders:Juergen Buchmueller +#include "emu.h" +#include "debugger.h" +#include "sh2.h" + +#define SIGNX8(x) (((int32_t)(x) << 24) >> 24) +#define SIGNX12(x) (((int32_t)(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_t op0000(std::ostream &stream, uint32_t pc, uint16_t opcode) +{ + uint32_t flags = 0; + switch(opcode & 0x3f) + { + case 0x02: + util::stream_format(stream, "STC SR,%s", regname[Rn]); + break; + case 0x03: + util::stream_format(stream, "BSRF %s", regname[Rn]); + break; + case 0x08: + stream << "CLRT"; + break; + case 0x09: + stream << "NOP"; + break; + case 0x0A: + util::stream_format(stream, "STS MACH,%s", regname[Rn]); + break; + case 0x0B: + stream << "RTS"; + flags = DASMFLAG_STEP_OUT; + break; + case 0x12: + util::stream_format(stream, "STS GBR,%s", regname[Rn]); + break; + case 0x18: + stream << "SETT"; + break; + case 0x19: + stream << "DIV0U"; + break; + case 0x1A: + util::stream_format(stream, "STS MACL,%s", regname[Rn]); + break; + case 0x1B: + stream << "SLEEP"; + break; + case 0x22: + util::stream_format(stream, "STC VBR,%s", regname[Rn]); + break; + case 0x23: + util::stream_format(stream, "BRAF %s", regname[Rn]); + break; + case 0x28: + stream << "CLRMAC"; + break; + case 0x29: + util::stream_format(stream, "MOVT %s", regname[Rn]); + break; + case 0x2A: + util::stream_format(stream, "STS PR,%s", regname[Rn]); + break; + case 0x2B: + stream << "RTE"; + flags = DASMFLAG_STEP_OUT; + break; + default: + switch(opcode & 15) + { + case 0: + util::stream_format(stream, "?????? $%04X", opcode); + break; + case 1: + util::stream_format(stream, "?????? $%04X", opcode); + break; + case 2: + util::stream_format(stream, "?????? $%04X", opcode); + break; + case 3: + util::stream_format(stream, "?????? $%04X", opcode); + break; + case 4: + util::stream_format(stream, "MOV.B %s,@(R0,%s)", regname[Rm], regname[Rn]); + break; + case 5: + util::stream_format(stream, "MOV.W %s,@(R0,%s)", regname[Rm], regname[Rn]); + break; + case 6: + util::stream_format(stream, "MOV.L %s,@(R0,%s)", regname[Rm], regname[Rn]); + break; + case 7: + util::stream_format(stream, "MUL.L %s,%s", regname[Rm], regname[Rn]); + break; + case 8: + util::stream_format(stream, "?????? $%04X", opcode); + break; + case 9: + util::stream_format(stream, "?????? $%04X", opcode); + break; + case 10: + util::stream_format(stream, "?????? $%04X", opcode); + break; + case 11: + util::stream_format(stream, "?????? $%04X", opcode); + break; + case 12: + util::stream_format(stream, "MOV.B @(R0,%s),%s", regname[Rm], regname[Rn]); + break; + case 13: + util::stream_format(stream, "MOV.W @(R0,%s),%s", regname[Rm], regname[Rn]); + break; + case 14: + util::stream_format(stream, "MOV.L @(R0,%s),%s", regname[Rm], regname[Rn]); + break; + case 15: + util::stream_format(stream, "MAC.L @%s+,@%s+", regname[Rn], regname[Rm]); + break; + } + } + return flags; +} + +static uint32_t op0001(std::ostream &stream, uint32_t pc, uint16_t opcode) +{ + util::stream_format(stream, "MOV.L %s,@($%02X,%s)", regname[Rm], (opcode & 15) * 4, regname[Rn]); + return 0; +} + +static uint32_t op0010(std::ostream &stream, uint32_t pc, uint16_t opcode) +{ + switch (opcode & 15) + { + case 0: + util::stream_format(stream, "MOV.B %s,@%s", regname[Rm], regname[Rn]); + break; + case 1: + util::stream_format(stream, "MOV.W %s,@%s", regname[Rm], regname[Rn]); + break; + case 2: + util::stream_format(stream, "MOV.L %s,@%s", regname[Rm], regname[Rn]); + break; + case 3: + util::stream_format(stream, "?????? $%04X", opcode); + break; + case 4: + util::stream_format(stream, "MOV.B %s,@-%s", regname[Rm], regname[Rn]); + break; + case 5: + util::stream_format(stream, "MOV.W %s,@-%s", regname[Rm], regname[Rn]); + break; + case 6: + util::stream_format(stream, "MOV.L %s,@-%s", regname[Rm], regname[Rn]); + break; + case 7: + util::stream_format(stream, "DIV0S %s,%s", regname[Rm], regname[Rn]); + break; + case 8: + util::stream_format(stream, "TST %s,%s", regname[Rm], regname[Rn]); + break; + case 9: + util::stream_format(stream, "AND %s,%s", regname[Rm], regname[Rn]); + break; + case 10: + util::stream_format(stream, "XOR %s,%s", regname[Rm], regname[Rn]); + break; + case 11: + util::stream_format(stream, "OR %s,%s", regname[Rm], regname[Rn]); + break; + case 12: + util::stream_format(stream, "CMP/STR %s,%s", regname[Rm], regname[Rn]); + break; + case 13: + util::stream_format(stream, "XTRCT %s,%s", regname[Rm], regname[Rn]); + break; + case 14: + util::stream_format(stream, "MULU.W %s,%s", regname[Rm], regname[Rn]); + break; + case 15: + util::stream_format(stream, "MULS.W %s,%s", regname[Rm], regname[Rn]); + break; + } + return 0; +} + +static uint32_t op0011(std::ostream &stream, uint32_t pc, uint16_t opcode) +{ + switch (opcode & 15) + { + case 0: + util::stream_format(stream, "CMP/EQ %s,%s", regname[Rm], regname[Rn]); + break; + case 1: + util::stream_format(stream, "?????? %s,%s", regname[Rm], regname[Rn]); + break; + case 2: + util::stream_format(stream, "CMP/HS %s,%s", regname[Rm], regname[Rn]); + break; + case 3: + util::stream_format(stream, "CMP/GE %s,%s", regname[Rm], regname[Rn]); + break; + case 4: + util::stream_format(stream, "DIV1 %s,%s", regname[Rm], regname[Rn]); + break; + case 5: + util::stream_format(stream, "DMULU.L %s,%s", regname[Rm], regname[Rn]); + break; + case 6: + util::stream_format(stream, "CMP/HI %s,%s", regname[Rm], regname[Rn]); + break; + case 7: + util::stream_format(stream, "CMP/GT %s,%s", regname[Rm], regname[Rn]); + break; + case 8: + util::stream_format(stream, "SUB %s,%s", regname[Rm], regname[Rn]); + break; + case 9: + util::stream_format(stream, "?????? %s,%s", regname[Rm], regname[Rn]); + break; + case 10: + util::stream_format(stream, "SUBC %s,%s", regname[Rm], regname[Rn]); + break; + case 11: + util::stream_format(stream, "SUBV %s,%s", regname[Rm], regname[Rn]); + break; + case 12: + util::stream_format(stream, "ADD %s,%s", regname[Rm], regname[Rn]); + break; + case 13: + util::stream_format(stream, "DMULS.L %s,%s", regname[Rm], regname[Rn]); + break; + case 14: + util::stream_format(stream, "ADDC %s,%s", regname[Rm], regname[Rn]); + break; + case 15: + util::stream_format(stream, "ADDV %s,%s", regname[Rm], regname[Rn]); + break; + } + return 0; +} + +static uint32_t op0100(std::ostream &stream, uint32_t pc, uint16_t opcode) +{ + uint32_t flags = 0; + switch(opcode & 0x3F) + { + case 0x00: + util::stream_format(stream, "SHLL %s", regname[Rn]); + break; + case 0x01: + util::stream_format(stream, "SHLR %s", regname[Rn]); + break; + case 0x02: + util::stream_format(stream, "STS.L MACH,@-%s", regname[Rn]); + break; + case 0x03: + util::stream_format(stream, "STC.L SR,@-%s", regname[Rn]); + break; + case 0x04: + util::stream_format(stream, "ROTL %s", regname[Rn]); + break; + case 0x05: + util::stream_format(stream, "ROTR %s", regname[Rn]); + break; + case 0x06: + util::stream_format(stream, "LDS.L @%s+,MACH", regname[Rn]); + break; + case 0x07: + util::stream_format(stream, "LDC.L @%s+,SR", regname[Rn]); + break; + case 0x08: + util::stream_format(stream, "SHLL2 %s", regname[Rn]); + break; + case 0x09: + util::stream_format(stream, "SHLR2 %s", regname[Rn]); + break; + case 0x0a: + util::stream_format(stream, "LDS %s,MACH", regname[Rn]); + break; + case 0x0b: + util::stream_format(stream, "JSR %s", regname[Rn]); + flags = DASMFLAG_STEP_OVER | DASMFLAG_STEP_OVER_EXTRA(1); + break; + case 0x0e: + util::stream_format(stream, "LDC %s,SR", regname[Rn]); + break; + case 0x10: + util::stream_format(stream, "DT %s", regname[Rn]); + break; + case 0x11: + util::stream_format(stream, "CMP/PZ %s", regname[Rn]); + break; + case 0x12: + util::stream_format(stream, "STS.L MACL,@-%s", regname[Rn]); + break; + case 0x13: + util::stream_format(stream, "STC.L GBR,@-%s", regname[Rn]); + break; + case 0x15: + util::stream_format(stream, "CMP/PL %s", regname[Rn]); + break; + case 0x16: + util::stream_format(stream, "LDS.L @%s+,MACL", regname[Rn]); + break; + case 0x17: + util::stream_format(stream, "LDC.L @%s+,GBR", regname[Rn]); + break; + case 0x18: + util::stream_format(stream, "SHLL8 %s", regname[Rn]); + break; + case 0x19: + util::stream_format(stream, "SHLR8 %s", regname[Rn]); + break; + case 0x1a: + util::stream_format(stream, "LDS %s,MACL", regname[Rn]); + break; + case 0x1b: + util::stream_format(stream, "TAS %s", regname[Rn]); + break; + case 0x1e: + util::stream_format(stream, "LDC %s,GBR", regname[Rn]); + break; + case 0x20: + util::stream_format(stream, "SHAL %s", regname[Rn]); + break; + case 0x21: + util::stream_format(stream, "SHAR %s", regname[Rn]); + break; + case 0x22: + util::stream_format(stream, "STS.L PR,@-%s", regname[Rn]); + break; + case 0x23: + util::stream_format(stream, "STC.L VBR,@-%s", regname[Rn]); + break; + case 0x24: + util::stream_format(stream, "ROTCL %s", regname[Rn]); + break; + case 0x25: + util::stream_format(stream, "ROTCR %s", regname[Rn]); + break; + case 0x26: + util::stream_format(stream, "LDS.L @%s+,PR", regname[Rn]); + break; + case 0x27: + util::stream_format(stream, "LDC.L @%s+,VBR", regname[Rn]); + break; + case 0x28: + util::stream_format(stream, "SHLL16 %s", regname[Rn]); + break; + case 0x29: + util::stream_format(stream, "SHLR16 %s", regname[Rn]); + break; + case 0x2a: + util::stream_format(stream, "LDS %s,PR", regname[Rn]); + break; + case 0x2b: + util::stream_format(stream, "JMP %s", regname[Rn]); + break; + case 0x2e: + util::stream_format(stream, "LDC %s,VBR", regname[Rn]); + break; + default: + if ((opcode & 15) == 15) + util::stream_format(stream, "MAC.W @%s+,@%s+", regname[Rm], regname[Rn]); + else + util::stream_format(stream, "?????? $%04X", opcode); + } + return flags; +} + +static uint32_t op0101(std::ostream &stream, uint32_t pc, uint16_t opcode) +{ + util::stream_format(stream, "MOV.L @($%02X,%s),%s", (opcode & 15) * 4, regname[Rm], regname[Rn]); + return 0; +} + +static uint32_t op0110(std::ostream &stream, uint32_t pc, uint16_t opcode) + +{ + switch(opcode & 0xF) + { + case 0x00: + util::stream_format(stream, "MOV.B @%s,%s", regname[Rm], regname[Rn]); + break; + case 0x01: + util::stream_format(stream, "MOV.W @%s,%s", regname[Rm], regname[Rn]); + break; + case 0x02: + util::stream_format(stream, "MOV.L @%s,%s", regname[Rm], regname[Rn]); + break; + case 0x03: + util::stream_format(stream, "MOV %s,%s", regname[Rm], regname[Rn]); + break; + case 0x04: + util::stream_format(stream, "MOV.B @%s+,%s", regname[Rm], regname[Rn]); + break; + case 0x05: + util::stream_format(stream, "MOV.W @%s+,%s", regname[Rm], regname[Rn]); + break; + case 0x06: + util::stream_format(stream, "MOV.L @%s+,%s", regname[Rm], regname[Rn]); + break; + case 0x07: + util::stream_format(stream, "NOT %s,%s", regname[Rm], regname[Rn]); + break; + case 0x08: + util::stream_format(stream, "SWAP.B %s,%s", regname[Rm], regname[Rn]); + break; + case 0x09: + util::stream_format(stream, "SWAP.W %s,%s", regname[Rm], regname[Rn]); + break; + case 0x0a: + util::stream_format(stream, "NEGC %s,%s", regname[Rm], regname[Rn]); + break; + case 0x0b: + util::stream_format(stream, "NEG %s,%s", regname[Rm], regname[Rn]); + break; + case 0x0c: + util::stream_format(stream, "EXTU.B %s,%s", regname[Rm], regname[Rn]); + break; + case 0x0d: + util::stream_format(stream, "EXTU.W %s,%s", regname[Rm], regname[Rn]); + break; + case 0x0e: + util::stream_format(stream, "EXTS.B %s,%s", regname[Rm], regname[Rn]); + break; + case 0x0f: + util::stream_format(stream, "EXTS.W %s,%s", regname[Rm], regname[Rn]); + break; + } + return 0; +} + +static uint32_t op0111(std::ostream &stream, uint32_t pc, uint16_t opcode) +{ + util::stream_format(stream, "ADD #$%02X,%s", opcode & 0xff, regname[Rn]); + return 0; +} + +static uint32_t op1000(std::ostream &stream, uint32_t pc, uint16_t opcode) +{ + switch((opcode >> 8) & 15) + { + case 0: + util::stream_format(stream, "MOV.B R0,@($%02X,%s)", (opcode & 15), regname[Rm]); + break; + case 1: + util::stream_format(stream, "MOV.W R0,@($%02X,%s)", (opcode & 15) * 2, regname[Rm]); + break; + case 4: + util::stream_format(stream, "MOV.B @($%02X,%s),R0", (opcode & 15), regname[Rm]); + break; + case 5: + util::stream_format(stream, "MOV.W @($%02X,%s),R0", (opcode & 15), regname[Rm]); + break; + case 8: + util::stream_format(stream, "CMP/EQ #$%02X,R0", (opcode & 0xff)); + break; + case 9: + util::stream_format(stream, "BT $%08X", pc + SIGNX8(opcode & 0xff) * 2 + 2); + break; + case 11: + util::stream_format(stream, "BF $%08X", pc + SIGNX8(opcode & 0xff) * 2 + 2); + break; + case 13: + util::stream_format(stream, "BTS $%08X", pc + SIGNX8(opcode & 0xff) * 2 + 2); + break; + case 15: + util::stream_format(stream, "BFS $%08X", pc + SIGNX8(opcode & 0xff) * 2 + 2); + break; + default : + util::stream_format(stream, "invalid $%04X", opcode); + } + return 0; +} + +static uint32_t op1001(std::ostream &stream, uint32_t pc, uint16_t opcode) +{ + util::stream_format(stream, "MOV.W @($%04X,PC),%s [%08X]", (opcode & 0xff) * 2, regname[Rn], pc+((opcode & 0xff) * 2)+2); + return 0; +} + +static uint32_t op1010(std::ostream &stream, uint32_t pc, uint16_t opcode) +{ + util::stream_format(stream, "BRA $%08X", SIGNX12(opcode & 0xfff) * 2 + pc + 2); + return 0; +} + +static uint32_t op1011(std::ostream &stream, uint32_t pc, uint16_t opcode) +{ + util::stream_format(stream, "BSR $%08X", SIGNX12(opcode & 0xfff) * 2 + pc + 2); + return DASMFLAG_STEP_OVER | DASMFLAG_STEP_OVER_EXTRA(1); +} + +static uint32_t op1100(std::ostream &stream, uint32_t pc, uint16_t opcode) +{ + uint32_t flags = 0; + switch((opcode >> 8) & 15) + { + case 0: + util::stream_format(stream, "MOV.B R0,@($%02X,GBR)", opcode & 0xff); + break; + case 1: + util::stream_format(stream, "MOV.W R0,@($%04X,GBR)", (opcode & 0xff) * 2); + break; + case 2: + util::stream_format(stream, "MOV.L R0,@($%04X,GBR)", (opcode & 0xff) * 4); + break; + case 3: + util::stream_format(stream, "TRAPA #$%02X", opcode & 0xff); + flags = DASMFLAG_STEP_OVER; + break; + case 4: + util::stream_format(stream, "MOV.B @($%02X,GBR),R0", opcode & 0xff); + break; + case 5: + util::stream_format(stream, "MOV.W @($%04X,GBR),R0", (opcode & 0xff) * 2); + break; + case 6: + util::stream_format(stream, "MOV.L @($%04X,GBR),R0", (opcode & 0xff) * 4); + break; + case 7: + util::stream_format(stream, "MOVA @($%04X,PC),R0 [%08X]", (opcode & 0xff) * 4, ((pc + 2) & ~3) + (opcode & 0xff) * 4); + break; + case 8: + util::stream_format(stream, "TST #$%02X,R0", opcode & 0xff); + break; + case 9: + util::stream_format(stream, "AND #$%02X,R0", opcode & 0xff); + break; + case 10: + util::stream_format(stream, "XOR #$%02X,R0", opcode & 0xff); + break; + case 11: + util::stream_format(stream, "OR #$%02X,R0", opcode & 0xff); + break; + case 12: + util::stream_format(stream, "TST.B #$%02X,@(R0,GBR)", opcode & 0xff); + break; + case 13: + util::stream_format(stream, "AND.B #$%02X,@(R0,GBR)", opcode & 0xff); + break; + case 14: + util::stream_format(stream, "XOR.B #$%02X,@(R0,GBR)", opcode & 0xff); + break; + case 15: + util::stream_format(stream, "OR.B #$%02X,@(R0,GBR)", opcode & 0xff); + break; + } + return flags; +} + +static uint32_t op1101(std::ostream &stream, uint32_t pc, uint16_t opcode) +{ + util::stream_format(stream, "MOV.L @($%02X,PC),%s [%08X]", (opcode * 4) & 0xff, regname[Rn], ((pc + 2) & ~3) + (opcode & 0xff) * 4); + return 0; +} + +static uint32_t op1110(std::ostream &stream, uint32_t pc, uint16_t opcode) +{ + util::stream_format(stream, "MOV #$%02X,%s", (opcode & 0xff), regname[Rn]); + return 0; +} + +static uint32_t op1111(std::ostream &stream, uint32_t pc, uint16_t opcode) +{ + util::stream_format(stream, "unknown $%04X", opcode); + return 0; +} + +unsigned DasmSH2(std::ostream &stream, unsigned pc, uint16_t opcode) +{ + uint32_t flags; + + pc += 2; + + switch ((opcode >> 12) & 15) + { + case 0: flags = op0000(stream, pc, opcode); break; + case 1: flags = op0001(stream, pc, opcode); break; + case 2: flags = op0010(stream, pc, opcode); break; + case 3: flags = op0011(stream, pc, opcode); break; + case 4: flags = op0100(stream, pc, opcode); break; + case 5: flags = op0101(stream, pc, opcode); break; + case 6: flags = op0110(stream, pc, opcode); break; + case 7: flags = op0111(stream, pc, opcode); break; + case 8: flags = op1000(stream, pc, opcode); break; + case 9: flags = op1001(stream, pc, opcode); break; + case 10: flags = op1010(stream, pc, opcode); break; + case 11: flags = op1011(stream, pc, opcode); break; + case 12: flags = op1100(stream, pc, opcode); break; + case 13: flags = op1101(stream, pc, opcode); break; + case 14: flags = op1110(stream, pc, opcode); break; + default: flags = op1111(stream, pc, opcode); break; + } + return 2 | flags | DASMFLAG_SUPPORTED; +} + +CPU_DISASSEMBLE(sh2) +{ + return DasmSH2(stream, pc, (oprom[0] << 8) | oprom[1]); +} |