+++ /dev/null
-\r
-// This file is part of the Cyclone 68000 Emulator\r
-\r
-// Copyright (c) 2004,2011 FinalDave (emudave (at) gmail.com)\r
-// Copyright (c) 2005-2011 GraÅžvydas "notaz" Ignotas (notasas (at) gmail.com)\r
-\r
-// This code is licensed under the GNU General Public License version 2.0 and the MAME License.\r
-// You can choose the license that has the most advantages for you.\r
-\r
-// SVN repository can be found at http://code.google.com/p/cyclone68000/\r
-\r
-\r
-#include "app.h"\r
-\r
-int opend_op_changes_cycles, opend_check_interrupt, opend_check_trace;\r
-\r
-static unsigned char OpData[16]={0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};\r
-\r
-static unsigned short OpRead16(unsigned int a)\r
-{\r
- return (unsigned short)( (OpData[a&15]<<8) | OpData[(a+1)&15] );\r
-}\r
-\r
-// For opcode 'op' use handler 'use'\r
-void OpUse(int op,int use)\r
-{\r
- char text[64]="";\r
- CyJump[op]=use;\r
-\r
- if (op!=use) return;\r
-\r
- // Disassemble opcode\r
- DisaPc=0;\r
- DisaText=text;\r
- DisaWord=OpRead16;\r
-\r
- DisaGet();\r
- ot(";@ ---------- [%.4x] %s uses Op%.4x ----------\n",op,text,use);\r
-}\r
-\r
-void OpStart(int op, int sea, int tea, int op_changes_cycles, int supervisor_check)\r
-{\r
- int last_op_count=arm_op_count;\r
-\r
- Cycles=0;\r
- OpUse(op,op); // This opcode obviously uses this handler\r
- ot("Op%.4x%s\n", op, ms?"":":");\r
-\r
- if (supervisor_check)\r
- {\r
- // checks for supervisor bit, if not set, jumps to SuperEnd()\r
- // also sets r11 to SR high value, SuperChange() uses this\r
- ot(" ldr r11,[r7,#0x44] ;@ Get SR high\n");\r
- }\r
- if ((sea >= 0x10 && sea != 0x3c) || (tea >= 0x10 && tea != 0x3c))\r
- {\r
-#if MEMHANDLERS_NEED_PREV_PC\r
- ot(" str r4,[r7,#0x50] ;@ Save prev PC + 2\n");\r
-#endif\r
-#if MEMHANDLERS_NEED_CYCLES\r
- ot(" str r5,[r7,#0x5c] ;@ Save Cycles\n");\r
-#endif\r
- }\r
- if (supervisor_check)\r
- {\r
- ot(" tst r11,#0x20 ;@ Check we are in supervisor mode\n");\r
- ot(" beq WrongPrivilegeMode ;@ No\n");\r
- }\r
- if ((sea >= 0x10 && sea != 0x3c) || (tea >= 0x10 && tea != 0x3c)) {\r
-#if MEMHANDLERS_CHANGE_CYCLES\r
- if (op_changes_cycles)\r
- ot(" mov r5,#0\n");\r
-#endif\r
- }\r
- if (last_op_count!=arm_op_count)\r
- ot("\n");\r
- pc_dirty = 1;\r
- opend_op_changes_cycles = opend_check_interrupt = opend_check_trace = 0;\r
-}\r
-\r
-void OpEnd(int sea, int tea)\r
-{\r
- int did_fetch=0;\r
- opend_check_trace = opend_check_trace && EMULATE_TRACE;\r
-#if MEMHANDLERS_CHANGE_CYCLES\r
- if ((sea >= 0x10 && sea != 0x3c) || (tea >= 0x10 && tea != 0x3c))\r
- {\r
- if (opend_op_changes_cycles)\r
- {\r
- ot(" ldr r0,[r7,#0x5c] ;@ Load Cycles\n");\r
- ot(" ldrh r8,[r4],#2 ;@ Fetch next opcode\n");\r
- ot(" add r5,r0,r5\n");\r
- did_fetch=1;\r
- }\r
- else\r
- {\r
- ot(" ldr r5,[r7,#0x5c] ;@ Load Cycles\n");\r
- }\r
- }\r
-#endif\r
- if (!did_fetch)\r
- ot(" ldrh r8,[r4],#2 ;@ Fetch next opcode\n");\r
- if (opend_check_trace)\r
- ot(" ldr r1,[r7,#0x44]\n");\r
- ot(" subs r5,r5,#%d ;@ Subtract cycles\n",Cycles);\r
- if (opend_check_trace)\r
- {\r
- ot(";@ CheckTrace:\n");\r
- ot(" tst r1,#0x80\n");\r
- ot(" bne CycloneDoTraceWithChecks\n");\r
- ot(" cmp r5,#0\n");\r
- }\r
- if (opend_check_interrupt)\r
- {\r
- ot(" blt CycloneEnd\n");\r
- ot(";@ CheckInterrupt:\n");\r
- if (!opend_check_trace)\r
- ot(" ldr r1,[r7,#0x44]\n");\r
- ot(" movs r0,r1,lsr #24 ;@ Get IRQ level\n"); // same as ldrb r0,[r7,#0x47]\r
- ot(" ldreq pc,[r6,r8,asl #2] ;@ Jump to next opcode handler\n");\r
- ot(" cmp r0,#6 ;@ irq>6 ?\n");\r
- ot(" andle r1,r1,#7 ;@ Get interrupt mask\n");\r
- ot(" cmple r0,r1 ;@ irq<=6: Is irq<=mask ?\n");\r
- ot(" ldrle pc,[r6,r8,asl #2] ;@ Jump to next opcode handler\n");\r
- ot(" b CycloneDoInterruptGoBack\n");\r
- }\r
- else\r
- {\r
- ot(" ldrge pc,[r6,r8,asl #2] ;@ Jump to opcode handler\n");\r
- ot(" b CycloneEnd\n");\r
- }\r
- ot("\n");\r
-}\r
-\r
-int OpBase(int op,int size,int sepa)\r
-{\r
- int ea=op&0x3f; // Get Effective Address\r
- if (ea<0x10) return sepa?(op&~0x7):(op&~0xf); // Use 1 handler for d0-d7 and a0-a7\r
- if (size==0&&(ea==0x1f || ea==0x27)) return op; // Specific handler for (a7)+ and -(a7)\r
- if (ea<0x38) return op&~7; // Use 1 handler for (a0)-(a7), etc...\r
- return op;\r
-}\r
-\r
-// Get flags, trashes r2\r
-int OpGetFlags(int subtract,int xbit,int specialz)\r
-{\r
- if (specialz) ot(" orr r2,r10,#0xb0000000 ;@ for old Z\n");\r
-\r
- ot(" mrs r10,cpsr ;@ r10=flags\n");\r
-\r
- if (specialz) ot(" andeq r10,r10,r2 ;@ fix Z\n");\r
-\r
- if (subtract) ot(" eor r10,r10,#0x20000000 ;@ Invert carry\n");\r
-\r
- if (xbit)\r
- {\r
- ot(" str r10,[r7,#0x4c] ;@ Save X bit\n");\r
- }\r
- return 0;\r
-}\r
-\r
-// -----------------------------------------------------------------\r
-\r
-int g_op;\r
-\r
-void OpAny(int op)\r
-{\r
- memset(OpData,0x33,sizeof(OpData));\r
- OpData[0]=(unsigned char)(op>>8);\r
- OpData[1]=(unsigned char)op;\r
- g_op=op;\r
-\r
- if ((op&0xf100)==0x0000) OpArith(op); // +\r
- if ((op&0xc000)==0x0000) OpMove(op); // +\r
- if ((op&0xf5bf)==0x003c) OpArithSr(op); // + Ori/Andi/Eori $nnnn,sr\r
- if ((op&0xf100)==0x0100) OpBtstReg(op); // +\r
- if ((op&0xf138)==0x0108) OpMovep(op); // +\r
- if ((op&0xff00)==0x0800) OpBtstImm(op); // +\r
- if ((op&0xf900)==0x4000) OpNeg(op); // +\r
- if ((op&0xf140)==0x4100) OpChk(op); // +\r
- if ((op&0xf1c0)==0x41c0) OpLea(op); // +\r
- if ((op&0xf9c0)==0x40c0) OpMoveSr(op); // +\r
- if ((op&0xffc0)==0x4800) OpNbcd(op); // +\r
- if ((op&0xfff8)==0x4840) OpSwap(op); // +\r
- if ((op&0xffc0)==0x4840) OpPea(op); // +\r
- if ((op&0xffb8)==0x4880) OpExt(op); // +\r
- if ((op&0xfb80)==0x4880) OpMovem(op); // +\r
- if ((op&0xff00)==0x4a00) OpTst(op); // +\r
- if ((op&0xffc0)==0x4ac0) OpTas(op); // +\r
- if ((op&0xfff0)==0x4e40) OpTrap(op); // +\r
- if ((op&0xfff8)==0x4e50) OpLink(op); // +\r
- if ((op&0xfff8)==0x4e58) OpUnlk(op); // +\r
- if ((op&0xfff0)==0x4e60) OpMoveUsp(op); // +\r
- if ((op&0xfff8)==0x4e70) Op4E70(op); // + Reset/Rts etc\r
- if ((op&0xfffd)==0x4e70) OpStopReset(op);// +\r
- if ((op&0xff80)==0x4e80) OpJsr(op); // +\r
- if ((op&0xf000)==0x5000) OpAddq(op); // +\r
- if ((op&0xf0c0)==0x50c0) OpSet(op); // +\r
- if ((op&0xf0f8)==0x50c8) OpDbra(op); // +\r
- if ((op&0xf000)==0x6000) OpBranch(op); // +\r
- if ((op&0xf100)==0x7000) OpMoveq(op); // +\r
- if ((op&0xa000)==0x8000) OpArithReg(op); // + Or/Sub/And/Add\r
- if ((op&0xb1f0)==0x8100) OpAbcd(op); // +\r
- if ((op&0xb0c0)==0x80c0) OpMul(op); // +\r
- if ((op&0x90c0)==0x90c0) OpAritha(op); // +\r
- if ((op&0xb130)==0x9100) OpAddx(op); // +\r
- if ((op&0xf000)==0xb000) OpCmpEor(op); // +\r
- if ((op&0xf138)==0xb108) OpCmpm(op); // +\r
- if ((op&0xf130)==0xc100) OpExg(op); // +\r
- if ((op&0xf000)==0xe000) OpAsr(op); // + Asr/l/Ror/l etc\r
- if ((op&0xf8c0)==0xe0c0) OpAsrEa(op); // +\r
-\r
- if (op==0xffff)\r
- {\r
- SuperEnd();\r
- }\r
-}\r
-\r