// 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; }