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Diffstat (limited to 'src/devices/cpu/am29000/am29dasm.cpp')
-rw-r--r--src/devices/cpu/am29000/am29dasm.cpp259
1 files changed, 259 insertions, 0 deletions
diff --git a/src/devices/cpu/am29000/am29dasm.cpp b/src/devices/cpu/am29000/am29dasm.cpp
new file mode 100644
index 00000000000..bd8c6712fd2
--- /dev/null
+++ b/src/devices/cpu/am29000/am29dasm.cpp
@@ -0,0 +1,259 @@
+// license:BSD-3-Clause
+// copyright-holders:Philip Bennett
+/***************************************************************************
+
+ am29dasm.c
+ Disassembler for the portable Am29000 emulator.
+ Written by Phil Bennett
+
+***************************************************************************/
+
+#include "emu.h"
+#include "am29000.h"
+
+
+/***************************************************************************
+ DEFINES AND MACROS
+***************************************************************************/
+
+#define OP_M_BIT (1 << 24)
+#define OP_RC ((op >> 16) & 0xff)
+#define OP_RA ((op >> 8) & 0xff)
+#define OP_RB (op & 0xff)
+#define OP_I8 (op & 0xff)
+#define OP_SA ((op >> 8) & 0xff)
+#define OP_I16 (((op >> 8) & 0xff00) | (op & 0xff))
+#define OP_IJMP (OP_I16 << 2)
+#define OP_VN ((op >> 16) & 0xff)
+
+#define OP_CE ((op >> 23) & 1)
+#define OP_CNTL ((op >> 16) & 0x7f)
+
+#define OP_SJMP ((INT32)(INT16)OP_I16 << 2)
+
+
+/***************************************************************************
+ CODE
+***************************************************************************/
+
+static const char *dasm_type1(UINT32 op)
+{
+ static char buf[32];
+
+ if (op & OP_M_BIT)
+ sprintf(buf, "r%d, r%d, $%.2x", OP_RC, OP_RA, OP_I8);
+ else
+ sprintf(buf, "r%d, r%d, r%d", OP_RC, OP_RA, OP_RB);
+
+ return buf;
+}
+
+static const char *dasm_type2(UINT32 op)
+{
+ static char buf[32];
+
+ sprintf(buf, "r%d, r%d, r%d", OP_RC, OP_RA, OP_RB);
+
+ return buf;
+}
+
+static const char *dasm_type3(UINT32 op)
+{
+ static char buf[32];
+
+ sprintf(buf, "r%d, $%.4x", OP_RA, OP_I16);
+
+ return buf;
+}
+
+static const char *dasm_type4(UINT32 op, UINT32 pc)
+{
+ static char buf[32];
+
+ if (op & OP_M_BIT)
+ sprintf(buf, "r%d, $%.4x", OP_RA, OP_IJMP);
+ else
+ sprintf(buf, "r%d, $%.4x", OP_RA, pc + OP_SJMP);
+
+ return buf;
+}
+
+static const char *dasm_type5(UINT32 op)
+{
+ static char buf[32];
+
+ if (op & OP_M_BIT)
+ sprintf(buf, "trap%d, r%d, $%.2x", OP_VN, OP_RA, OP_I8);
+ else
+ sprintf(buf, "trap%d, r%d, r%d", OP_VN, OP_RA, OP_RB);
+
+ return buf;
+}
+
+static const char *dasm_type6(UINT32 op)
+{
+ static char buf[32];
+
+ if (op & OP_M_BIT)
+ sprintf(buf, "%d, %x, r%d, $%.2x", OP_CE, OP_CNTL, OP_RA, OP_I8);
+ else
+ sprintf(buf, "%d, %x, r%d, r%d", OP_CE, OP_CNTL, OP_RA, OP_RB);
+
+ return buf;
+}
+
+#define TYPE_1 dasm_type1(op)
+#define TYPE_2 dasm_type2(op)
+#define TYPE_3 dasm_type3(op)
+#define TYPE_4 dasm_type4(op, pc)
+#define TYPE_5 dasm_type5(op)
+#define TYPE_6 dasm_type6(op)
+
+
+static const char* get_spr(int spid)
+{
+ switch (spid)
+ {
+ case 0: return "VAB";
+ case 1: return "OPS";
+ case 2: return "CPS";
+ case 3: return "CFG";
+ case 4: return "CHA";
+ case 5: return "CHD";
+ case 6: return "CHC";
+ case 7: return "RBP";
+ case 8: return "TMC";
+ case 9: return "TMR";
+ case 10: return "PC0";
+ case 11: return "PC1";
+ case 12: return "PC2";
+ case 13: return "MMU";
+ case 14: return "LRU";
+ case 128: return "IPC";
+ case 129: return "IPA";
+ case 130: return "IPB";
+ case 131: return "Q";
+ case 132: return "ALU";
+ case 133: return "BP";
+ case 134: return "FC";
+ case 135: return "CR";
+ case 160: return "FPE";
+ case 161: return "INTE";
+ case 162: return "FPS";
+ case 164: return "EXOP";
+ default: return "????";
+ }
+}
+
+CPU_DISASSEMBLE( am29000 )
+{
+ UINT32 op = (oprom[0] << 24) | (oprom[1] << 16) | (oprom[2] << 8) | oprom[3];
+ UINT32 flags = 0;
+
+ switch (op >> 24)
+ {
+ case 0x01: sprintf(buffer, "constn %s", TYPE_3); break;
+ case 0x02: sprintf(buffer, "consth %s", TYPE_3); break;
+ case 0x03: sprintf(buffer, "const %s", TYPE_3); break;
+ case 0x04: sprintf(buffer, "mtsrim %s, $%.4x", get_spr(OP_SA), OP_I16); break;
+ case 0x06: case 0x07: sprintf(buffer, "loadl %s", TYPE_6); break;
+ case 0x08: sprintf(buffer, "clz r%d, %d", OP_RC, OP_RB); break;
+ case 0x09: sprintf(buffer, "clz %d, %.2x", OP_RC, OP_I8); break;
+ case 0x0a: case 0x0b: sprintf(buffer, "exbyte %s", TYPE_1); break;
+ case 0x0c: case 0x0d: sprintf(buffer, "inbyte %s", TYPE_1); break;
+ case 0x0e: case 0x0f: sprintf(buffer, "storel %s", TYPE_6); break;
+ case 0x10: case 0x11: sprintf(buffer, "adds %s", TYPE_1); break;
+ case 0x12: case 0x13: sprintf(buffer, "addu %s", TYPE_1); break;
+ case 0x14: case 0x15: sprintf(buffer, "add %s", TYPE_1); break;
+ case 0x16: case 0x17: sprintf(buffer, "load %s", TYPE_6); break;
+ case 0x18: case 0x19: sprintf(buffer, "addcs %s", TYPE_1); break;
+ case 0x1a: case 0x1b: sprintf(buffer, "addcu %s", TYPE_1); break;
+ case 0x1c: case 0x1d: sprintf(buffer, "addc %s", TYPE_1); break;
+ case 0x1e: case 0x1f: sprintf(buffer, "store %s", TYPE_6); break;
+ case 0x20: case 0x21: sprintf(buffer, "subs %s", TYPE_1); break;
+ case 0x22: case 0x23: sprintf(buffer, "subu %s", TYPE_1); break;
+ case 0x24: case 0x25: sprintf(buffer, "sub %s", TYPE_1); break;
+ case 0x26: case 0x27: sprintf(buffer, "loadset %s", TYPE_6); break;
+ case 0x28: case 0x29: sprintf(buffer, "subcs %s", TYPE_1); break;
+ case 0x2a: case 0x2b: sprintf(buffer, "subcu %s", TYPE_1); break;
+ case 0x2c: case 0x2d: sprintf(buffer, "subc %s", TYPE_1); break;
+ case 0x2e: case 0x2f: sprintf(buffer, "cpbyte %s", TYPE_1); break;
+ case 0x30: case 0x31: sprintf(buffer, "subrs %s", TYPE_1); break;
+ case 0x32: case 0x33: sprintf(buffer, "subru %s", TYPE_1); break;
+ case 0x34: case 0x35: sprintf(buffer, "subr %s", TYPE_1); break;
+ case 0x36: case 0x37: sprintf(buffer, "loadm %s", TYPE_6); break;
+ case 0x38: case 0x39: sprintf(buffer, "subrcs %s", TYPE_1); break;
+ case 0x3a: case 0x3b: sprintf(buffer, "subrcu %s", TYPE_1); break;
+ case 0x3c: case 0x3d: sprintf(buffer, "subrc %s", TYPE_1); break;
+ case 0x3e: case 0x3f: sprintf(buffer, "storem %s", TYPE_6); break;
+ case 0x40: case 0x41: sprintf(buffer, "cplt %s", TYPE_1); break;
+ case 0x42: case 0x43: sprintf(buffer, "cpltu %s", TYPE_1); break;
+ case 0x44: case 0x45: sprintf(buffer, "cple %s", TYPE_1); break;
+ case 0x46: case 0x47: sprintf(buffer, "cpleu %s", TYPE_1); break;
+ case 0x48: case 0x49: sprintf(buffer, "cpgt %s", TYPE_1); break;
+ case 0x4a: case 0x4b: sprintf(buffer, "cpgtu %s", TYPE_1); break;
+ case 0x4c: case 0x4d: sprintf(buffer, "cpge %s", TYPE_1); break;
+ case 0x4e: case 0x4f: sprintf(buffer, "cpgeu %s", TYPE_1); break;
+ case 0x50: case 0x51: sprintf(buffer, "aslt %s", TYPE_5); break;
+ case 0x52: case 0x53: sprintf(buffer, "asltu %s", TYPE_5); break;
+ case 0x54: case 0x55: sprintf(buffer, "asle %s", TYPE_5); break;
+ case 0x56: case 0x57: sprintf(buffer, "asleu %s", TYPE_5); break;
+ case 0x58: case 0x59: sprintf(buffer, "asgt %s", TYPE_5); break;
+ case 0x5a: case 0x5b: sprintf(buffer, "asgtu %s", TYPE_5); break;
+ case 0x5c: case 0x5d: sprintf(buffer, "asge %s", TYPE_5); break;
+ case 0x5e: case 0x5f: sprintf(buffer, "asgeu %s", TYPE_5); break;
+ case 0x60: case 0x61: sprintf(buffer, "cpeq %s", TYPE_1); break;
+ case 0x62: case 0x63: sprintf(buffer, "cpneq %s", TYPE_1); break;
+ case 0x64: case 0x65: sprintf(buffer, "mul %s", TYPE_1); break;
+ case 0x66: case 0x67: sprintf(buffer, "mull %s", TYPE_1); break;
+ case 0x68: sprintf(buffer, "div0 r%d, r%d", OP_RC, OP_RB); break;
+ case 0x69: sprintf(buffer, "div0 r%d, %.2x", OP_RC, OP_I8); break;
+ case 0x6a: case 0x6b: sprintf(buffer, "div %s", TYPE_1); break;
+ case 0x6c: case 0x6d: sprintf(buffer, "divl %s", TYPE_1); break;
+ case 0x6e: case 0x6f: sprintf(buffer, "divrem %s", TYPE_1); break;
+ case 0x70: case 0x71: sprintf(buffer, "aseq %s", TYPE_5); break;
+ case 0x72: case 0x73: sprintf(buffer, "asneq %s", TYPE_5); break;
+ case 0x74: case 0x75: sprintf(buffer, "mulu %s", TYPE_1); break;
+ case 0x78: case 0x79: sprintf(buffer, "inhw %s", TYPE_1); break;
+ case 0x7a: case 0x7b: sprintf(buffer, "extract %s", TYPE_1); break;
+ case 0x7c: case 0x7d: sprintf(buffer, "exhw %s", TYPE_1); break;
+ case 0x7e: sprintf(buffer, "exhws %s", TYPE_1); break;
+ case 0x80: case 0x81: sprintf(buffer, "sll %s", TYPE_1); break;
+ case 0x82: case 0x83: sprintf(buffer, "srl %s", TYPE_1); break;
+ case 0x86: case 0x87: sprintf(buffer, "sra %s", TYPE_1); break;
+ case 0x88: sprintf(buffer, "iret"); break;
+ case 0x89: sprintf(buffer, "halt"); break;
+ case 0x8c: sprintf(buffer, "iretinv"); break;
+ case 0x90: case 0x91: sprintf(buffer, "and %s", TYPE_1); break;
+ case 0x92: case 0x93: sprintf(buffer, "or %s", TYPE_1); break;
+ case 0x94: case 0x95: sprintf(buffer, "xor %s", TYPE_1); break;
+ case 0x96: case 0x97: sprintf(buffer, "xnor %s", TYPE_1); break;
+ case 0x98: case 0x99: sprintf(buffer, "nor %s", TYPE_1); break;
+ case 0x9a: case 0x9b: sprintf(buffer, "nand %s", TYPE_1); break;
+ case 0x9c: case 0x9d: sprintf(buffer, "andn %s", TYPE_1); break;
+ case 0x9e: sprintf(buffer, "setip %s", TYPE_2); break;
+ case 0x9f: sprintf(buffer, "inv"); break;
+ case 0xa0: sprintf(buffer, "jmp $%.4x", pc + OP_SJMP); break;
+ case 0xa1: sprintf(buffer, "jmp $%.4x", OP_IJMP); break;
+ case 0xa4: case 0xa5: sprintf(buffer, "jmpf %s", TYPE_4); break;
+ case 0xa8: case 0xa9: sprintf(buffer, "call %s", TYPE_4); break;
+ case 0xac: case 0xad: sprintf(buffer, "jmpt %s", TYPE_4); break;
+ case 0xb4: case 0xb5: sprintf(buffer, "jmpfdec %s", TYPE_4); break;
+ case 0xb6: sprintf(buffer, "mftlb r%d, r%d", OP_RC, OP_RA); break;
+ case 0xbe: sprintf(buffer, "mttlb r%d, r%d", OP_RA, OP_RB); break;
+ case 0xc0: sprintf(buffer, "jmpi r%d", OP_RB); break;
+ case 0xc4: sprintf(buffer, "jmpfi r%d, r%d", OP_RA, OP_RB); break;
+ case 0xc6: sprintf(buffer, "mfsr r%d, %s", OP_RC, get_spr(OP_SA)); break;
+ case 0xc8: sprintf(buffer, "calli r%d, r%d", OP_RA, OP_RB); break;
+ case 0xcc: sprintf(buffer, "jmpti r%d, r%d", OP_RA, OP_RB); break;
+ case 0xce: sprintf(buffer, "mtsr %s, r%d", get_spr(OP_SA), OP_RB); break;
+ case 0xd7: sprintf(buffer, "emulate %s", TYPE_5); break;
+ case 0xde: sprintf(buffer, "multm %s", TYPE_2); break;
+ case 0xdf: sprintf(buffer, "multmu %s", TYPE_2); break;
+
+ case 0xe0: sprintf(buffer, "multiply %s", TYPE_2); break;
+ case 0xe1: sprintf(buffer, "divide %s", TYPE_2); break;
+ default: sprintf(buffer, "??????"); break;
+ }
+ return 4 | flags | DASMFLAG_SUPPORTED;
+}