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Diffstat (limited to 'trunk/src/emu/cpu/sh2/sh2dasm.c')
-rw-r--r--trunk/src/emu/cpu/sh2/sh2dasm.c609
1 files changed, 609 insertions, 0 deletions
diff --git a/trunk/src/emu/cpu/sh2/sh2dasm.c b/trunk/src/emu/cpu/sh2/sh2dasm.c
new file mode 100644
index 00000000000..f94125fb27c
--- /dev/null
+++ b/trunk/src/emu/cpu/sh2/sh2dasm.c
@@ -0,0 +1,609 @@
+#include "emu.h"
+#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;
+}
+
+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] );
+}
+