mirror of
https://github.com/RaySollium99/picodrive.git
synced 2025-10-27 21:48:50 +01:00
657 lines
16 KiB
C
657 lines
16 KiB
C
#include <stdio.h>
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#include "sh2dasm.h"
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typedef int INT32;
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typedef unsigned int UINT32;
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typedef unsigned short UINT16;
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typedef unsigned char UINT8;
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#define DASMFLAG_STEP_OUT 0
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#define DASMFLAG_STEP_OVER 0
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#define DASMFLAG_STEP_OVER_EXTRA(x) 0
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#define SIGNX8(x) (((INT32)(x) << 24) >> 24)
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#define SIGNX12(x) (((INT32)(x) << 20) >> 20)
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#define Rn ((opcode >> 8) & 15)
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#define Rm ((opcode >> 4) & 15)
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static const char *const regname[16] = {
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"R0", "R1", "R2", "R3", "R4", "R5", "R6", "R7",
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"R8", "R9", "R10","R11","R12","R13","R14","SP"
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};
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static UINT32 op0000(char *buffer, UINT32 pc, UINT16 opcode)
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{
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UINT32 flags = 0;
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switch(opcode & 0x3f)
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{
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case 0x02:
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sprintf(buffer,"STC SR,%s", regname[Rn]);
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break;
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case 0x03:
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sprintf(buffer,"BSRF %s", regname[Rn]);
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break;
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case 0x08:
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sprintf(buffer,"CLRT");
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break;
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case 0x09:
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sprintf(buffer,"NOP");
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break;
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case 0x0A:
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sprintf(buffer,"STS MACH,%s", regname[Rn]);
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break;
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case 0x0B:
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sprintf(buffer,"RTS");
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flags = DASMFLAG_STEP_OUT;
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break;
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case 0x12:
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sprintf(buffer,"STS GBR,%s", regname[Rn]);
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break;
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case 0x18:
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sprintf(buffer,"SETT");
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break;
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case 0x19:
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sprintf(buffer,"DIV0U");
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break;
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case 0x1A:
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sprintf(buffer,"STS MACL,%s", regname[Rn]);
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break;
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case 0x1B:
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sprintf(buffer,"SLEEP");
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break;
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case 0x22:
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sprintf(buffer,"STC VBR,%s", regname[Rn]);
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break;
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case 0x23:
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sprintf(buffer,"BRAF %s", regname[Rn]);
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break;
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case 0x28:
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sprintf(buffer,"CLRMAC");
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break;
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case 0x29:
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sprintf(buffer,"MOVT %s", regname[Rn]);
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break;
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case 0x2A:
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sprintf(buffer,"STS PR,%s", regname[Rn]);
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break;
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case 0x2B:
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sprintf(buffer,"RTE");
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flags = DASMFLAG_STEP_OUT;
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break;
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default:
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switch(opcode & 15)
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{
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case 0:
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sprintf(buffer, "?????? $%04X", opcode);
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break;
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case 1:
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sprintf(buffer, "?????? $%04X", opcode);
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break;
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case 2:
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sprintf(buffer, "?????? $%04X", opcode);
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break;
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case 3:
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sprintf(buffer, "?????? $%04X", opcode);
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break;
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case 4:
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sprintf(buffer, "MOV.B %s,@(R0,%s)", regname[Rm], regname[Rn]);
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break;
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case 5:
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sprintf(buffer, "MOV.W %s,@(R0,%s)", regname[Rm], regname[Rn]);
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break;
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case 6:
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sprintf(buffer, "MOV.L %s,@(R0,%s)", regname[Rm], regname[Rn]);
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break;
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case 7:
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sprintf(buffer, "MUL.L %s,%s", regname[Rm], regname[Rn]);
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break;
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case 8:
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sprintf(buffer, "?????? $%04X", opcode);
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break;
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case 9:
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sprintf(buffer, "?????? $%04X", opcode);
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break;
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case 10:
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sprintf(buffer, "?????? $%04X", opcode);
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break;
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case 11:
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sprintf(buffer, "?????? $%04X", opcode);
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break;
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case 12:
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sprintf(buffer, "MOV.B @(R0,%s),%s", regname[Rm], regname[Rn]);
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break;
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case 13:
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sprintf(buffer, "MOV.W @(R0,%s),%s", regname[Rm], regname[Rn]);
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break;
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case 14:
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sprintf(buffer, "MOV.L @(R0,%s),%s", regname[Rm], regname[Rn]);
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break;
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case 15:
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sprintf(buffer, "MAC.L @%s+,@%s+", regname[Rn], regname[Rm]);
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break;
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}
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}
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return flags;
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}
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static UINT32 op0001(char *buffer, UINT32 pc, UINT16 opcode)
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{
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sprintf(buffer, "MOV.L %s,@($%02X,%s)", regname[Rm], (opcode & 15) * 4, regname[Rn]);
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return 0;
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}
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static UINT32 op0010(char *buffer, UINT32 pc, UINT16 opcode)
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{
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switch (opcode & 15)
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{
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case 0:
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sprintf(buffer, "MOV.B %s,@%s", regname[Rm], regname[Rn]);
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break;
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case 1:
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sprintf(buffer, "MOV.W %s,@%s", regname[Rm], regname[Rn]);
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break;
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case 2:
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sprintf(buffer, "MOV.L %s,@%s", regname[Rm], regname[Rn]);
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break;
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case 3:
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sprintf(buffer, "?????? $%04X", opcode);
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break;
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case 4:
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sprintf(buffer, "MOV.B %s,@-%s", regname[Rm], regname[Rn]);
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break;
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case 5:
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sprintf(buffer, "MOV.W %s,@-%s", regname[Rm], regname[Rn]);
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break;
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case 6:
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sprintf(buffer, "MOV.L %s,@-%s", regname[Rm], regname[Rn]);
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break;
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case 7:
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sprintf(buffer, "DIV0S %s,%s", regname[Rm], regname[Rn]);
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break;
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case 8:
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sprintf(buffer, "TST %s,%s", regname[Rm], regname[Rn]);
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break;
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case 9:
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sprintf(buffer, "AND %s,%s", regname[Rm], regname[Rn]);
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break;
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case 10:
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sprintf(buffer, "XOR %s,%s", regname[Rm], regname[Rn]);
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break;
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case 11:
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sprintf(buffer, "OR %s,%s", regname[Rm], regname[Rn]);
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break;
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case 12:
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sprintf(buffer, "CMP/STR %s,%s", regname[Rm], regname[Rn]);
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break;
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case 13:
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sprintf(buffer, "XTRCT %s,%s", regname[Rm], regname[Rn]);
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break;
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case 14:
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sprintf(buffer, "MULU.W %s,%s", regname[Rm], regname[Rn]);
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break;
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case 15:
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sprintf(buffer, "MULS.W %s,%s", regname[Rm], regname[Rn]);
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break;
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}
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return 0;
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}
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static UINT32 op0011(char *buffer, UINT32 pc, UINT16 opcode)
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{
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switch (opcode & 15)
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{
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case 0:
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sprintf(buffer, "CMP/EQ %s,%s", regname[Rm], regname[Rn]);
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break;
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case 1:
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sprintf(buffer, "?????? %s,%s", regname[Rm], regname[Rn]);
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break;
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case 2:
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sprintf(buffer, "CMP/HS %s,%s", regname[Rm], regname[Rn]);
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break;
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case 3:
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sprintf(buffer, "CMP/GE %s,%s", regname[Rm], regname[Rn]);
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break;
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case 4:
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sprintf(buffer, "DIV1 %s,%s", regname[Rm], regname[Rn]);
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break;
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case 5:
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sprintf(buffer, "DMULU.L %s,%s", regname[Rm], regname[Rn]);
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break;
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case 6:
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sprintf(buffer, "CMP/HI %s,%s", regname[Rm], regname[Rn]);
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break;
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case 7:
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sprintf(buffer, "CMP/GT %s,%s", regname[Rm], regname[Rn]);
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break;
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case 8:
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sprintf(buffer, "SUB %s,%s", regname[Rm], regname[Rn]);
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break;
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case 9:
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sprintf(buffer, "?????? %s,%s", regname[Rm], regname[Rn]);
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break;
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case 10:
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sprintf(buffer, "SUBC %s,%s", regname[Rm], regname[Rn]);
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break;
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case 11:
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sprintf(buffer, "SUBV %s,%s", regname[Rm], regname[Rn]);
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break;
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case 12:
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sprintf(buffer, "ADD %s,%s", regname[Rm], regname[Rn]);
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break;
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case 13:
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sprintf(buffer, "DMULS.L %s,%s", regname[Rm], regname[Rn]);
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break;
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case 14:
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sprintf(buffer, "ADDC %s,%s", regname[Rm], regname[Rn]);
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break;
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case 15:
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sprintf(buffer, "ADDV %s,%s", regname[Rm], regname[Rn]);
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break;
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}
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return 0;
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}
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static UINT32 op0100(char *buffer, UINT32 pc, UINT16 opcode)
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{
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UINT32 flags = 0;
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switch(opcode & 0x3F)
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{
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case 0x00:
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sprintf(buffer, "SHLL %s", regname[Rn]);
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break;
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case 0x01:
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sprintf(buffer, "SHLR %s", regname[Rn]);
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break;
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case 0x02:
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sprintf(buffer, "STS.L MACH,@-%s", regname[Rn]);
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break;
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case 0x03:
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sprintf(buffer, "STC.L SR,@-%s", regname[Rn]);
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break;
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case 0x04:
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sprintf(buffer, "ROTL %s", regname[Rn]);
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break;
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case 0x05:
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sprintf(buffer, "ROTR %s", regname[Rn]);
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break;
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case 0x06:
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sprintf(buffer, "LDS.L @%s+,MACH", regname[Rn]);
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break;
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case 0x07:
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sprintf(buffer, "LDC.L @%s+,SR", regname[Rn]);
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break;
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case 0x08:
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sprintf(buffer, "SHLL2 %s", regname[Rn]);
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break;
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case 0x09:
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sprintf(buffer, "SHLR2 %s", regname[Rn]);
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break;
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case 0x0a:
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sprintf(buffer, "LDS %s,MACH", regname[Rn]);
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break;
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case 0x0b:
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sprintf(buffer, "JSR %s", regname[Rn]);
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flags = DASMFLAG_STEP_OVER | DASMFLAG_STEP_OVER_EXTRA(1);
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break;
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case 0x0e:
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sprintf(buffer, "LDC %s,SR", regname[Rn]);
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break;
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case 0x10:
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sprintf(buffer, "DT %s", regname[Rn]);
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break;
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case 0x11:
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sprintf(buffer, "CMP/PZ %s", regname[Rn]);
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break;
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case 0x12:
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sprintf(buffer, "STS.L MACL,@-%s", regname[Rn]);
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break;
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case 0x13:
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sprintf(buffer, "STC.L GBR,@-%s", regname[Rn]);
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break;
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case 0x15:
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sprintf(buffer, "CMP/PL %s", regname[Rn]);
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break;
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case 0x16:
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sprintf(buffer, "LDS.L @%s+,MACL", regname[Rn]);
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break;
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case 0x17:
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sprintf(buffer, "LDC.L @%s+,GBR", regname[Rn]);
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break;
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case 0x18:
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sprintf(buffer, "SHLL8 %s", regname[Rn]);
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break;
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case 0x19:
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sprintf(buffer, "SHLR8 %s", regname[Rn]);
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break;
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case 0x1a:
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sprintf(buffer, "LDS %s,MACL", regname[Rn]);
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break;
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case 0x1b:
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sprintf(buffer, "TAS %s", regname[Rn]);
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break;
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case 0x1e:
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sprintf(buffer, "LDC %s,GBR", regname[Rn]);
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break;
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case 0x20:
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sprintf(buffer, "SHAL %s", regname[Rn]);
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break;
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case 0x21:
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sprintf(buffer, "SHAR %s", regname[Rn]);
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break;
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case 0x22:
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sprintf(buffer, "STS.L PR,@-%s", regname[Rn]);
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break;
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case 0x23:
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sprintf(buffer, "STC.L VBR,@-%s", regname[Rn]);
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break;
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case 0x24:
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sprintf(buffer, "ROTCL %s", regname[Rn]);
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break;
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case 0x25:
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sprintf(buffer, "ROTCR %s", regname[Rn]);
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break;
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case 0x26:
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sprintf(buffer, "LDS.L @%s+,PR", regname[Rn]);
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break;
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case 0x27:
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sprintf(buffer, "LDC.L @%s+,VBR", regname[Rn]);
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break;
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case 0x28:
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sprintf(buffer, "SHLL16 %s", regname[Rn]);
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break;
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case 0x29:
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sprintf(buffer, "SHLR16 %s", regname[Rn]);
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break;
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case 0x2a:
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sprintf(buffer, "LDS %s,PR", regname[Rn]);
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break;
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case 0x2b:
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sprintf(buffer, "JMP %s", regname[Rn]);
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break;
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case 0x2e:
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sprintf(buffer, "LDC %s,VBR", regname[Rn]);
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break;
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default:
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if ((opcode & 15) == 15)
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sprintf(buffer, "MAC.W @%s+,@%s+", regname[Rm], regname[Rn]);
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else
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sprintf(buffer, "?????? $%04X", opcode);
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}
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return flags;
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}
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static UINT32 op0101(char *buffer, UINT32 pc, UINT16 opcode)
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{
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sprintf(buffer, "MOV.L @($%02X,%s),%s", (opcode & 15) * 4, regname[Rm], regname[Rn]);
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return 0;
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}
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static UINT32 op0110(char *buffer, UINT32 pc, UINT16 opcode)
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{
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switch(opcode & 0xF)
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{
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case 0x00:
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sprintf(buffer, "MOV.B @%s,%s", regname[Rm], regname[Rn]);
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break;
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case 0x01:
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sprintf(buffer, "MOV.W @%s,%s", regname[Rm], regname[Rn]);
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break;
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case 0x02:
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sprintf(buffer, "MOV.L @%s,%s", regname[Rm], regname[Rn]);
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break;
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case 0x03:
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sprintf(buffer, "MOV %s,%s", regname[Rm], regname[Rn]);
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break;
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case 0x04:
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sprintf(buffer, "MOV.B @%s+,%s", regname[Rm], regname[Rn]);
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break;
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case 0x05:
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sprintf(buffer, "MOV.W @%s+,%s", regname[Rm], regname[Rn]);
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break;
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case 0x06:
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sprintf(buffer, "MOV.L @%s+,%s", regname[Rm], regname[Rn]);
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break;
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case 0x07:
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sprintf(buffer, "NOT %s,%s", regname[Rm], regname[Rn]);
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break;
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case 0x08:
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sprintf(buffer, "SWAP.B %s,%s", regname[Rm], regname[Rn]);
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break;
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case 0x09:
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sprintf(buffer, "SWAP.W %s,%s", regname[Rm], regname[Rn]);
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break;
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case 0x0a:
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sprintf(buffer, "NEGC %s,%s", regname[Rm], regname[Rn]);
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break;
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case 0x0b:
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sprintf(buffer, "NEG %s,%s", regname[Rm], regname[Rn]);
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break;
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case 0x0c:
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sprintf(buffer, "EXTU.B %s,%s", regname[Rm], regname[Rn]);
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break;
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case 0x0d:
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sprintf(buffer, "EXTU.W %s,%s", regname[Rm], regname[Rn]);
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break;
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case 0x0e:
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sprintf(buffer, "EXTS.B %s,%s", regname[Rm], regname[Rn]);
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break;
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case 0x0f:
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sprintf(buffer, "EXTS.W %s,%s", regname[Rm], regname[Rn]);
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break;
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}
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return 0;
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}
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static UINT32 op0111(char *buffer, UINT32 pc, UINT16 opcode)
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{
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sprintf(buffer, "ADD #$%02X,%s", opcode & 0xff, regname[Rn]);
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return 0;
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}
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static UINT32 op1000(char *buffer, UINT32 pc, UINT16 opcode)
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{
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switch((opcode >> 8) & 15)
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{
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case 0:
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sprintf(buffer, "MOV.B R0,@($%02X,%s)", (opcode & 15), regname[Rm]);
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break;
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case 1:
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sprintf(buffer, "MOV.W R0,@($%02X,%s)", (opcode & 15) * 2, regname[Rm]);
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break;
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case 4:
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sprintf(buffer, "MOV.B @($%02X,%s),R0", (opcode & 15), regname[Rm]);
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break;
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case 5:
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sprintf(buffer, "MOV.W @($%02X,%s),R0", (opcode & 15) * 2, regname[Rm]);
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break;
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case 8:
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sprintf(buffer, "CMP/EQ #$%02X,R0", (opcode & 0xff));
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break;
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case 9:
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sprintf(buffer, "BT $%08x", pc + SIGNX8(opcode & 0xff) * 2 + 2);
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break;
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case 11:
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sprintf(buffer, "BF $%08x", pc + SIGNX8(opcode & 0xff) * 2 + 2);
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break;
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case 13:
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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 $%04X", opcode);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static UINT32 op1001(char *buffer, UINT32 pc, UINT16 opcode)
|
|
{
|
|
sprintf(buffer, "MOV.W @($%02X,PC),%s ; @$%08x", (opcode & 0xff) * 2, regname[Rn],
|
|
pc + (opcode & 0xff) * 2 + 2);
|
|
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 @($%04X,PC),R0 ; @$%08x", (opcode & 0xff) * 4,
|
|
((pc + 2) & ~3) + (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 @($%02X,PC),%s ; @$%08x", (opcode & 0xff) * 4, regname[Rn],
|
|
(pc + (opcode & 0xff) * 4 + 2) & ~3);
|
|
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;
|
|
}
|
|
|
|
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;
|
|
}
|
|
(void)flags;
|
|
return 0;//2 | flags | DASMFLAG_SUPPORTED;
|
|
}
|
|
|
|
#if 0
|
|
|
|
#define swab32(x) (((x) << 24) | (((x) << 8) & 0xff0000) | (((x) >> 8) & 0xff00) | ((x) >> 24))
|
|
#define swab16(x) ((((x) << 8) & 0xff00) | (((x) >> 8) & 0x00ff))
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
unsigned short op;
|
|
char buff[256];
|
|
unsigned pc;
|
|
FILE *f;
|
|
int ret;
|
|
|
|
if (argv[1] == NULL) {
|
|
printf("usage\n%s <file>\n", argv[0]);
|
|
return 1;
|
|
}
|
|
|
|
f = fopen(argv[1], "rb");
|
|
if (f == NULL) {
|
|
fprintf(stderr, "can't open %s\n", argv[1]);
|
|
return 1;
|
|
}
|
|
|
|
for (pc = 0x140;; pc += 2)
|
|
{
|
|
fseek(f, pc, SEEK_SET);
|
|
|
|
ret = fread(&op, 1, sizeof(op), f);
|
|
if (ret != sizeof(op))
|
|
break;
|
|
|
|
DasmSH2(buff, pc, swab16(op));
|
|
printf("%06x %04x %s\n", pc, swab16(op), buff);
|
|
}
|
|
|
|
fclose(f);
|
|
return 0;
|
|
}
|
|
|
|
#endif
|