From 7441f043a0ba83bd919db25bf3b8e35ae635012a Mon Sep 17 00:00:00 2001 From: notaz Date: Sun, 13 Feb 2011 17:49:01 +0000 Subject: [PATCH] add a copy of Disa so Cyclone can be built standalone --- Cyclone/Cyclone.dsp | 4 +- Cyclone/Disa/Disa.c | 855 ++++++++++++++++++++++++++++++++++++++++++++ Cyclone/Disa/Disa.h | 33 ++ Cyclone/Makefile | 5 +- 4 files changed, 891 insertions(+), 6 deletions(-) create mode 100644 Cyclone/Disa/Disa.c create mode 100644 Cyclone/Disa/Disa.h diff --git a/Cyclone/Cyclone.dsp b/Cyclone/Cyclone.dsp index 7085e11..f40bf42 100644 --- a/Cyclone/Cyclone.dsp +++ b/Cyclone/Cyclone.dsp @@ -151,11 +151,11 @@ SOURCE=.\Cyclone.s # PROP Default_Filter "" # Begin Source File -SOURCE=..\Pico\Disa.c +SOURCE=.\Disa\Disa.c # End Source File # Begin Source File -SOURCE=..\Pico\Disa.h +SOURCE=.\Disa\Disa.h # End Source File # End Group # Begin Source File diff --git a/Cyclone/Disa/Disa.c b/Cyclone/Disa/Disa.c new file mode 100644 index 0000000..01a54bc --- /dev/null +++ b/Cyclone/Disa/Disa.c @@ -0,0 +1,855 @@ + +// This file is part of the PicoDrive Megadrive Emulator + +// Copyright (c) 2011 FinalDave (emudave (at) gmail.com) + +// This code is licensed under the GNU General Public License version 2.0 and the MAME License. +// You can choose the license that has the most advantages for you. + +// SVN repository can be found at http://code.google.com/p/cyclone68000/ + +// Disa 68000 Disassembler +#ifndef __GNUC__ +#pragma warning(disable:4115) +#endif + +#define _CRT_SECURE_NO_WARNINGS +#include +#include +#include "Disa.h" + +unsigned int DisaPc=0; +char *DisaText=NULL; // Text buffer to write in +static char Tasm[]="bwl?"; +static char Comment[64]=""; +unsigned short (CPU_CALL *DisaWord)(unsigned int a)=NULL; + +static unsigned int DisaLong(unsigned int a) +{ + unsigned int d=0; + if (DisaWord==NULL) return d; + + d= DisaWord(a)<<16; + d|=DisaWord(a+2)&0xffff; + return d; +} + +// Get text version of the effective address +int DisaGetEa(char *t,int ea,int size) +{ + ea&=0x3f; t[0]=0; + if ((ea&0x38)==0x00) { sprintf(t,"d%d",ea ); return 0; } // 000rrr + if ((ea&0x38)==0x08) { sprintf(t,"a%d",ea&7); return 0; } // 001rrr + if ((ea&0x38)==0x10) { sprintf(t,"(a%d)",ea&7); return 0; } // 010rrr + if ((ea&0x38)==0x18) { sprintf(t,"(a%d)+",ea&7); return 0; } // 011rrr + if ((ea&0x38)==0x20) { sprintf(t,"-(a%d)",ea&7); return 0; } // 100rrr + if ((ea&0x38)==0x28) { sprintf(t,"($%x,a%d)",DisaWord(DisaPc)&0xffff,ea&7); DisaPc+=2; return 0; } // 101rrr + + if ((ea&0x38)==0x30) + { + // 110nnn - An + Disp + D/An + int areg=0,ext=0,off=0,da=0,reg=0,wol=0,scale=0; + ext=DisaWord(DisaPc)&0xffff; + + areg=ea&7; + off=ext&0xff; da =ext&0x8000?'a':'d'; + reg=(ext>>12)&7; wol=ext&0x0800?'l':'w'; + scale=1<<((ext>>9)&3); + + if (scale<2) sprintf(t,"($%x,a%d,%c%d.%c)", off,areg,da,reg,wol); + else sprintf(t,"($%x,a%d,%c%d.%c*%d)",off,areg,da,reg,wol,scale); // 68020 + + DisaPc+=2; + return 0; + } + + if (ea==0x38) { sprintf(t,"$%x.w",DisaWord(DisaPc)&0xffff); DisaPc+=2; return 0; } // 111000 - Absolute short + if (ea==0x39) { sprintf(t,"$%x.l",DisaLong(DisaPc)); DisaPc+=4; return 0; } // 111001 - Absolute long + + if (ea==0x3a) + { + // 111010 - PC Relative + int ext=DisaWord(DisaPc)&0xffff; + sprintf(t,"($%x,pc)",ext); + sprintf(Comment,"; =%x",DisaPc+(short)ext); // Comment where pc+ext is + DisaPc+=2; + return 0; + } + + if (ea==0x3b) + { + // 111011 - PC Relative + D/An + int ext=0,off=0,da=0,reg=0,wol=0,scale=0; + ext=DisaWord(DisaPc)&0xffff; + + off=ext&0xff; da =ext&0x8000?'a':'d'; + reg=(ext>>12)&7; wol=ext&0x0800?'l':'w'; + scale=1<<((ext>>9)&3); + + if (scale<2) sprintf(t,"($%x,pc,%c%d.%c)", off,da,reg,wol); + else sprintf(t,"($%x,pc,%c%d.%c*%d)",off,da,reg,wol,scale); // 68020 + + sprintf(Comment,"; =%x",DisaPc+(char)off); // Comment where pc+ext is + DisaPc+=2; + return 0; + } + + if (ea==0x3c) + { + // 111100 - Immediate + switch (size) + { + case 0: sprintf(t,"#$%x",DisaWord(DisaPc)&0x00ff); DisaPc+=2; return 0; + case 1: sprintf(t,"#$%x",DisaWord(DisaPc)&0xffff); DisaPc+=2; return 0; + case 2: sprintf(t,"#$%x",DisaLong(DisaPc) ); DisaPc+=4; return 0; + } + return 1; + } + +// Unknown effective address + sprintf(t,"ea=(%d%d%d %d%d%d)", + (ea>>5)&1,(ea>>4)&1,(ea>>3)&1, + (ea>>2)&1,(ea>>1)&1, ea &1); + return 1; +} + +static void GetOffset(char *text) +{ + int off=(short)DisaWord(DisaPc); DisaPc+=2; + + if (off<0) sprintf(text,"-$%x",-off); + else sprintf(text,"$%x", off); +} + +// ================ Opcodes 0x0000+ ================ +static int DisaArithImm(int op) +{ + // Or/And/Sub/Add/Eor/Cmp Immediate 0000ttt0 xxDDDddd (tt=type, xx=size extension, DDDddd=Dest ea) + int dea=0; + char seat[64]="",deat[64]=""; + int type=0,size=0; + char *arith[8]={"or","and","sub","add","?","eor","cmp","?"}; + + type=(op>>9)&7; if (type==4 || type>=7) return 1; + size=(op>>6)&3; if (size>=3) return 1; + dea=op&0x3f; if (dea==0x3c) return 1; + + DisaGetEa(seat,0x3c,size); + DisaGetEa(deat,dea, size); + + sprintf(DisaText,"%si.%c %s, %s",arith[type],Tasm[size],seat,deat); + return 0; +} + +// ================ Opcodes 0x0108+ ================ +static int DisaMovep(int op) +{ + // movep.x (Aa),Dn - 0000nnn1 dx001aaa nn + int dn=0,dir=0,size=0,an=0; + char offset[32]=""; + + dn =(op>>9)&7; + dir =(op>>7)&1; + size=(op>>6)&1; size++; + an = op &7; + + GetOffset(offset); + if (dir) sprintf(DisaText,"movep.%c d%d, (%s,a%d)",Tasm[size],dn,offset,an); + else sprintf(DisaText,"movep.%c (%s,a%d), d%d",Tasm[size],offset,an,dn); + + return 0; +} + +// ================ Opcodes 0x007c+ ================ +static int DisaArithSr(int op) +{ + // Ori/Andi/Eori $nnnn,sr 0000t0tx 0s111100 + char *opcode[6]={"ori","andi","","","","eori"}; + char seat[64]=""; + int type=0,size=0; + + type=(op>>9)&5; + size=(op>>6)&1; + + DisaGetEa(seat,0x3c,size); + sprintf(DisaText,"%s.%c %s, %s", opcode[type], Tasm[size], seat, size?"sr":"ccr"); + + return 0; +} + +// ================ Opcodes 0x0100+ ================ +static int DisaBtstReg(int op) +{ + // Btst/Bchg/Bclr/Bset 0000nnn1 tteeeeee (nn=reg number, eeeeee=Dest ea) + int type=0; + int sea=0,dea=0; + char seat[64]="",deat[64]=""; + char *opcode[4]={"btst","bchg","bclr","bset"}; + + sea =(op>>9)&7; + type=(op>>6)&3; + dea= op&0x3f; + + if ((dea&0x38)==0x08) return 1; // movep + DisaGetEa(seat,sea,0); + DisaGetEa(deat,dea,0); + + sprintf(DisaText,"%s %s, %s",opcode[type],seat,deat); + return 0; +} + +// ================ Opcodes 0x0800+ ================ +static int DisaBtstImm(int op) +{ + // Btst/Bchg/Bclr/Bset 00001000 tteeeeee 00 nn (eeeeee=ea, nn=bit number) + int type=0; + char seat[64]="",deat[64]=""; + char *opcode[4]={"btst","bchg","bclr","bset"}; + + type=(op>>6)&3; + DisaGetEa(seat, 0x3c,0); + DisaGetEa(deat,op&0x3f,0); + + sprintf(DisaText,"%s %s, %s",opcode[type],seat,deat); + return 0; +} + +// ================ Opcodes 0x1000+ ================ +static int DisaMove(int op) +{ + // Move 00xxdddD DDssssss (xx=size extension, ssssss=Source EA, DDDddd=Dest ea) + int sea=0,dea=0; + char inst[64]="",seat[64]="",deat[64]=""; + char *movea=""; + int size=0; + + if ((op&0x01c0)==0x0040) movea="a"; // See if it's a movea opcode + + // Find size extension + switch (op&0x3000) + { + case 0x1000: size=0; break; + case 0x3000: size=1; break; + case 0x2000: size=2; break; + default: return 1; + } + + sea = op&0x003f; + DisaGetEa(seat,sea,size); + + dea =(op&0x01c0)>>3; + dea|=(op&0x0e00)>>9; + DisaGetEa(deat,dea,size); + + sprintf(inst,"move%s.%c",movea,Tasm[size]); + sprintf(DisaText,"%s %s, %s",inst,seat,deat); + return 0; +} + +// ================ Opcodes 0x4000+ ================ +static int DisaNeg(int op) +{ + // 01000tt0 xxeeeeee (tt=negx/clr/neg/not, xx=size, eeeeee=EA) + char eat[64]=""; + int type=0,size=0; + char *opcode[4]={"negx","clr","neg","not"}; + + type=(op>>9)&3; + size=(op>>6)&3; if (size>=3) return 1; + DisaGetEa(eat,op&0x3f,size); + + sprintf(DisaText,"%s.%c %s",opcode[type],Tasm[size],eat); + return 0; +} + +// ================ Opcodes 0x40c0+ ================ +static int DisaMoveSr(int op) +{ + // 01000tt0 11eeeeee (tt=type, xx=size, eeeeee=EA) + int type=0,ea=0; + char eat[64]=""; + + type=(op>>9)&3; + ea=op&0x3f; + DisaGetEa(eat,ea,1); + + switch (type) + { + default: sprintf(DisaText,"move sr, %s", eat); break; + case 1: sprintf(DisaText,"move ccr, %s",eat); break; + case 2: sprintf(DisaText,"move %s, ccr",eat); break; + case 3: sprintf(DisaText,"move %s, sr", eat); break; + } + return 0; +} + +// ================ Opcodes 0x41c0+ ================ +static int DisaLea(int op) +{ + // Lea 0100nnn1 11eeeeee (eeeeee=ea) + int sea=0,dea=0; + char seat[64]="",deat[64]=""; + + sea=op&0x003f; + DisaGetEa(seat,sea,0); + + dea=(op>>9)&7; dea|=8; + DisaGetEa(deat,dea,2); + + sprintf(DisaText,"lea %s, %s",seat,deat); + return 0; +} + +static int MakeRegList(char *list,int mask,int ea) +{ + int reverse=0,i=0,low=0,len=0; + + if ((ea&0x38)==0x20) reverse=1; // -(An), bitfield is reversed + + mask&=0xffff; list[0]=0; + + for (i=0;i<17;i++) + { + int bit=0; + + // Mask off bit i: + if (reverse) bit=0x8000>>i; else bit=1<0) if (list[len-1]=='/') list[len-1]=0; + return 0; +} + +// ================ Opcodes 0x4840+ ================ +static int DisaSwap(int op) +{ + // Swap, 01001000 01000nnn swap Dn + sprintf(DisaText,"swap d%d",op&7); + return 0; +} + +// ================ Opcodes 0x4850+ ================ +static int DisaPea(int op) +{ + // Pea 01001000 01eeeeee (eeeeee=ea) pea + int ea=0; + char eat[64]=""; + + ea=op&0x003f; if (ea<0x10) return 1; // swap opcode + DisaGetEa(eat,ea,2); + + sprintf(DisaText,"pea %s",eat); + return 0; +} + +// ================ Opcodes 0x4880+ ================ +static int DisaExt(int op) +{ + // Ext 01001000 1x000nnn (x=size, eeeeee=EA) + char eat[64]=""; + int size=0; + + size=(op>>6)&1; size++; + DisaGetEa(eat,op&0x3f,size); + + sprintf(DisaText,"ext.%c %s",Tasm[size],eat); + return 0; +} + +// ================ Opcodes 0x4890+ ================ +static int DisaMovem(int op) +{ + // Movem 01001d00 1xeeeeee regmask d=direction, x=size, eeeeee=EA + int dir=0,size=0; + int ea=0,mask=0; + char list[64]="",eat[64]=""; + + dir=(op>>10)&1; + size=((op>>6)&1)+1; + ea=op&0x3f; if (ea<0x10) return 1; // ext opcode + + mask=DisaWord(DisaPc)&0xffff; DisaPc+=2; + + MakeRegList(list,mask,ea); // Turn register mask into text + DisaGetEa(eat,ea,size); + + if (dir) sprintf(DisaText,"movem.%c %s, %s",Tasm[size],eat,list); + else sprintf(DisaText,"movem.%c %s, %s",Tasm[size],list,eat); + return 0; +} + +// ================ Opcodes 0x4e40+ ================ +static int DisaTrap(int op) +{ + sprintf(DisaText,"trap #%d",op&0xf); + return 0; +} + +// ================ Opcodes 0x4e50+ ================ +static int DisaLink(int op) +{ + // Link opcode, 01001110 01010nnn dd link An,#offset + char eat[64]=""; + char offset[32]=""; + + DisaGetEa(eat,(op&7)|8,0); + GetOffset(offset); + + sprintf(DisaText,"link %s,#%s",eat,offset); + + return 0; +} + +// ================ Opcodes 0x4e58+ ================ +static int DisaUnlk(int op) +{ + // Link opcode, 01001110 01011nnn dd unlk An + char eat[64]=""; + + DisaGetEa(eat,(op&7)|8,0); + sprintf(DisaText,"unlk %s",eat); + + return 0; +} + +// ================ Opcodes 0x4e60+ ================ +static int DisaMoveUsp(int op) +{ + // Move USP opcode, 01001110 0110dnnn move An to/from USP (d=direction) + int ea=0,dir=0; + char eat[64]=""; + + dir=(op>>3)&1; + ea=(op&7)|8; + DisaGetEa(eat,ea,0); + + if (dir) sprintf(DisaText,"move usp, %s",eat); + else sprintf(DisaText,"move %s, usp",eat); + return 0; +} + +// ================ Opcodes 0x4e70+ ================ +static int Disa4E70(int op) +{ + char *inst[8]={"reset","nop","stop","rte","rtd","rts","trapv","rtr"}; + int n=0; + + n=op&7; + + sprintf(DisaText,"%s",inst[n]); + + //todo - 'stop' with 16 bit data + + return 0; +} + +// ================ Opcodes 0x4a00+ ================ +static int DisaTst(int op) +{ + // Tst 01001010 xxeeeeee (eeeeee=ea) + int ea=0; + char eat[64]=""; + int size=0; + + ea=op&0x003f; + DisaGetEa(eat,ea,0); + size=(op>>6)&3; if (size>=3) return 1; + + sprintf(DisaText,"tst.%c %s",Tasm[size],eat); + return 0; +} + +// ================ Opcodes 0x4e80+ ================ +static int DisaJsr(int op) +{ + // Jsr/Jmp 0100 1110 1mEE Eeee (eeeeee=ea m=1=jmp) + int sea=0; + char seat[64]=""; + + sea=op&0x003f; + DisaGetEa(seat,sea,0); + + sprintf(DisaText,"j%s %s", op&0x40?"mp":"sr", seat); + return 0; +} + +// ================ Opcodes 0x5000+ ================ +static int DisaAddq(int op) +{ + // 0101nnnt xxeeeeee (nnn=#8,1-7 t=addq/subq xx=size, eeeeee=EA) + int num=0,type=0,size=0,ea=0; + char eat[64]=""; + + num =(op>>9)&7; if (num==0) num=8; + type=(op>>8)&1; + size=(op>>6)&3; if (size>=3) return 1; + ea = op&0x3f; + + DisaGetEa(eat,ea,size); + + sprintf(DisaText,"%s.%c #%d, %s",type?"subq":"addq",Tasm[size],num,eat); + return 0; +} + +// ================ Opcodes 0x50c0+ ================ +static int DisaSet(int op) +{ + // 0101cccc 11eeeeee (sxx ea) + static char *cond[16]= + {"t" ,"f", "hi","ls","cc","cs","ne","eq", + "vc","vs","pl","mi","ge","lt","gt","le"}; + char *cc=""; + int ea=0; + char eat[64]=""; + + cc=cond[(op>>8)&0xf]; // Get condition code + ea=op&0x3f; + if ((ea&0x38)==0x08) return 1; // dbra, not scc + + DisaGetEa(eat,ea,0); + sprintf(DisaText,"s%s %s",cc,eat); + return 0; +} + +// ================ Opcodes 0x50c8+ ================ +static int DisaDbra(int op) +{ + // 0101cccc 11001nnn offset (dbra/dbxx Rn,offset) + int dea=0; char deat[64]=""; + int pc=0,Offset=0; + + static char *BraCode[16]= + {"bt" ,"bra","bhi","bls","bcc","bcs","bne","beq", + "bvc","bvs","bpl","bmi","bge","blt","bgt","ble"}; + char *Bra=""; + + dea=op&7; + DisaGetEa(deat,dea,2); + + // Get condition code + Bra=BraCode[(op>>8)&0xf]; + + // Get offset + pc=DisaPc; + Offset=(short)DisaWord(DisaPc); DisaPc+=2; + + sprintf(DisaText,"d%s %s, %x",Bra,deat,pc+Offset); + return 0; +} + +// ================ Opcodes 0x6000+ ================ +static int DisaBranch(int op) +{ + // Branch 0110cccc nn (cccc=condition) + int pc=0,Offset=0; + + static char *BraCode[16]= + {"bra","bsr","bhi","bls","bcc","bcs","bne","beq", + "bvc","bvs","bpl","bmi","bge","blt","bgt","ble"}; + char *Bra=""; + + // Get condition code + Bra=BraCode[(op>>8)&0x0f]; + + // Get offset + pc=DisaPc; + Offset=(char)(op&0xff); + if (Offset== 0) { Offset=(short)DisaWord(DisaPc); DisaPc+=2; } + else if (Offset==-1) { Offset= DisaLong(DisaPc); DisaPc+=4; } + + sprintf(DisaText,"%s %x",Bra,pc+Offset); + return 0; +} + +// ================ Opcodes 0x7000+ ================ +static int DisaMoveq(int op) +{ + // Moveq 0111rrr0 nn (rrr=Dest register, nn=data) + + int dea=0; char deat[64]=""; + char *inst="moveq"; + int val=0; + + dea=(op>>9)&7; + DisaGetEa(deat,dea,2); + + val=(char)(op&0xff); + sprintf(DisaText,"%s #$%x, %s",inst,val,deat); + return 0; +} + +// ================ Opcodes 0x8000+ ================ +static int DisaArithReg(int op) +{ + // 1t0tnnnd xxeeeeee (tt=type:or/sub/and/add xx=size, eeeeee=EA) + int type=0,size=0,dir=0,rea=0,ea=0; + char reat[64]="",eat[64]=""; + char *opcode[]={"or","sub","","","and","add"}; + + type=(op>>12)&5; + rea =(op>> 9)&7; + dir =(op>> 8)&1; + size=(op>> 6)&3; if (size>=3) return 1; + ea = op&0x3f; + + if (dir && ea<0x10) return 1; // addx opcode + + DisaGetEa(reat,rea,size); + DisaGetEa( eat, ea,size); + + if (dir) sprintf(DisaText,"%s.%c %s, %s",opcode[type],Tasm[size],reat,eat); + else sprintf(DisaText,"%s.%c %s, %s",opcode[type],Tasm[size],eat,reat); + return 0; +} + +// ================ Opcodes 0x8100+ ================ +static int DisaAbcd(int op) +{ + // 1t00ddd1 0000asss - sbcd/abcd Ds,Dd or -(As),-(Ad) + int type=0; + int dn=0,addr=0,sn=0; + char *opcode[]={"sbcd","abcd"}; + + type=(op>>14)&1; + dn =(op>> 9)&7; + addr=(op>> 3)&1; + sn = op &7; + + if (addr) sprintf(DisaText,"%s -(a%d), -(a%d)",opcode[type],sn,dn); + else sprintf(DisaText,"%s d%d, d%d", opcode[type],sn,dn); + + return 0; +} + +// ================ Opcodes 0x80c0+ ================ +static int DisaMul(int op) +{ + // Div/Mul: 1m00nnns 11eeeeee (m=Mul, nnn=Register Dn, s=signed, eeeeee=EA) + int type=0,rea=0,sign=0,ea=0,size=1; + char reat[64]="",eat[64]=""; + char *opcode[2]={"div","mul"}; + + type=(op>>14)&1; // div/mul + rea =(op>> 9)&7; + sign=(op>> 8)&1; + ea = op&0x3f; + + DisaGetEa(reat,rea,size); + DisaGetEa( eat, ea,size); + + sprintf(DisaText,"%s%c.%c %s, %s",opcode[type],sign?'s':'u',Tasm[size],eat,reat); + return 0; +} + +// ================ Opcodes 0x90c0+ ================ +static int DisaAritha(int op) +{ + // Suba/Cmpa/Adda 1tt1nnnx 11eeeeee (tt=type, x=size, eeeeee=Source EA) + int type=0,size=0,sea=0,dea=0; + char seat[64]="",deat[64]=""; + char *aritha[4]={"suba","cmpa","adda",""}; + + type=(op>>13)&3; if (type>=3) return 1; + size=(op>>8)&1; size++; + dea =(op>>9)&7; dea|=8; // Dest=An + sea = op&0x003f; // Source + + DisaGetEa(seat,sea,size); + DisaGetEa(deat,dea,size); + + sprintf(DisaText,"%s.%c %s, %s",aritha[type],Tasm[size],seat,deat); + return 0; +} + +// ================ Opcodes 0xb000+ ================ +static int DisaCmpEor(int op) +{ + // Cmp/Eor 1011rrrt xxeeeeee (rrr=Dn, t=cmp/eor, xx=size extension, eeeeee=ea) + char reat[64]="",eat[64]=""; + int type=0,size=0; + + type=(op>>8)&1; + size=(op>>6)&3; if (size>=3) return 1; // cmpa opcode + if ((op&0xf138)==0xb108) return 1; // cmpm opcode + + DisaGetEa(reat,(op>>9)&7,size); + DisaGetEa(eat, op&0x3f, size); + + if (type) sprintf(DisaText,"eor.%c %s, %s",Tasm[size],reat,eat); + else sprintf(DisaText,"cmp.%c %s, %s",Tasm[size],eat,reat); + return 0; +} + +// ================ Opcodes 0xb108+ ================ +static int DisaCmpm(int op) +{ + // Cmpm 1011ddd1 xx001sss + int type=0,size=0,dea=0,sea=0; + char deat[64]="",seat[64]=""; + + type=(op>>12)&5; + dea =(op>> 9)&7; dea|=8; + size=(op>> 6)&3; if (size>=3) return 1; + sea = op&0x3f; + + DisaGetEa(deat,dea,size); + DisaGetEa(seat,sea,size); + + sprintf(DisaText,"cmpm.%c (%s)+, (%s)+",Tasm[size],seat,deat); + + return 0; +} + +// ================ Opcodes 0xc140+ ================ +// 1100ttt1 01000sss exg ds,dt +// 1100ttt1 01001sss exg as,at +// 1100ttt1 10001sss exg as,dt +static int DisaExg(int op) +{ + int tr=0,type=0,sr=0; + + tr =(op>>9)&7; + type= op&0xf8; + sr = op&7; + + if (type==0x40) sprintf(DisaText,"exg d%d, d%d",sr,tr); + else if (type==0x48) sprintf(DisaText,"exg a%d, a%d",sr,tr); + else if (type==0x88) sprintf(DisaText,"exg a%d, d%d",sr,tr); + else return 1; + + return 0; +} + +// ================ Opcodes 0xd100+ ================ +static int DisaAddx(int op) +{ + // 1t01ddd1 xx000sss addx + int type=0,size=0,dea=0,sea=0; + char deat[64]="",seat[64]=""; + char *opcode[6]={"","subx","","","","addx"}; + + type=(op>>12)&5; + dea =(op>> 9)&7; + size=(op>> 6)&3; if (size>=3) return 1; + sea = op&0x3f; + + DisaGetEa(deat,dea,size); + DisaGetEa(seat,sea,size); + + sprintf(DisaText,"%s.%c %s, %s",opcode[type],Tasm[size],seat,deat); + return 0; +} + +// ================ Opcodes 0xe000+ ================ +static char *AsrName[4]={"as","ls","rox","ro"}; +static int DisaAsr(int op) +{ + // Asr/l/Ror/l etc - 1110cccd xxuttnnn + // (ccc=count, d=direction xx=size extension, u=use reg for count, tt=type, nnn=register Dn) + int count=0,dir=0,size=0,usereg=0,type=0,num=0; + + count =(op>>9)&7; + dir =(op>>8)&1; + size =(op>>6)&3; if (size>=3) return 1; // todo Asr EA + usereg=(op>>5)&1; + type =(op>>3)&3; + num = op &7; // Register number + + if (usereg==0) count=((count-1)&7)+1; // because ccc=000 means 8 + + sprintf(DisaText,"%s%c.%c %c%d, d%d", + AsrName[type], dir?'l':'r', Tasm[size], + usereg?'d':'#', count, num); + return 0; +} + +static int DisaAsrEa(int op) +{ + // Asr/l/Ror/l etc EA - 11100ttd 11eeeeee + int type=0,dir=0,size=1; + char eat[64]=""; + + type=(op>>9)&3; + dir =(op>>8)&1; + DisaGetEa(eat,op&0x3f,size); + + sprintf(DisaText,"%s%c.w %s", AsrName[type], dir?'l':'r', eat); + return 0; +} + +// ================================================================= + +static int TryOp(int op) +{ + if ((op&0xf100)==0x0000) DisaArithImm(op); // Ori/And/Sub/Add/Eor/Cmp Immediate + if ((op&0xf5bf)==0x003c) DisaArithSr(op); // Ori/Andi/Eori $nnnn,sr + if ((op&0xf100)==0x0100) DisaBtstReg(op); + if ((op&0xf138)==0x0108) DisaMovep(op); + if ((op&0xff00)==0x0800) DisaBtstImm(op); // Btst/Bchg/Bclr/Bset + if ((op&0xc000)==0x0000) DisaMove(op); + if ((op&0xf900)==0x4000) DisaNeg(op); // Negx/Clr/Neg/Not + if ((op&0xf1c0)==0x41c0) DisaLea(op); + if ((op&0xf9c0)==0x40c0) DisaMoveSr(op); + if ((op&0xfff8)==0x4840) DisaSwap(op); + if ((op&0xffc0)==0x4840) DisaPea(op); + if ((op&0xffb8)==0x4880) DisaExt(op); + if ((op&0xfb80)==0x4880) DisaMovem(op); + if ((op&0xff00)==0x4a00) DisaTst(op); + if ((op&0xfff0)==0x4e40) DisaTrap(op); + if ((op&0xfff8)==0x4e50) DisaLink(op); + if ((op&0xfff8)==0x4e58) DisaUnlk(op); + if ((op&0xfff0)==0x4e60) DisaMoveUsp(op); + if ((op&0xfff8)==0x4e70) Disa4E70(op); + if ((op&0xff80)==0x4e80) DisaJsr(op); + if ((op&0xf000)==0x5000) DisaAddq(op); + if ((op&0xf0c0)==0x50c0) DisaSet(op); + if ((op&0xf0f8)==0x50c8) DisaDbra(op); + if ((op&0xf000)==0x6000) DisaBranch(op); + if ((op&0xa000)==0x8000) DisaArithReg(op); // Or/Sub/And/Add + if ((op&0xb1f0)==0x8100) DisaAbcd(op); + if ((op&0xb130)==0x9100) DisaAddx(op); + if ((op&0xb0c0)==0x80c0) DisaMul(op); + if ((op&0xf100)==0x7000) DisaMoveq(op); + if ((op&0x90c0)==0x90c0) DisaAritha(op); + if ((op&0xf000)==0xb000) DisaCmpEor(op); + if ((op&0xf138)==0xb108) DisaCmpm(op); + if ((op&0xf130)==0xc100) DisaExg(op); + if ((op&0xf000)==0xe000) DisaAsr(op); + if ((op&0xf8c0)==0xe0c0) DisaAsrEa(op); + + // Unknown opcoode + return 0; +} + +int DisaGet() +{ + int op=0; + if (DisaWord==NULL) return 1; + + Comment[0]=0; + DisaText[0]=0; // Assume opcode unknown + + op=DisaWord(DisaPc)&0xffff; DisaPc+=2; + TryOp(op); + strcat(DisaText,Comment); + + // Unknown opcoode + return 0; +} diff --git a/Cyclone/Disa/Disa.h b/Cyclone/Disa/Disa.h new file mode 100644 index 0000000..dddc21d --- /dev/null +++ b/Cyclone/Disa/Disa.h @@ -0,0 +1,33 @@ + +// This file is part of the PicoDrive Megadrive Emulator + +// Copyright (c) 2011 FinalDave (emudave (at) gmail.com) + +// This code is licensed under the GNU General Public License version 2.0 and the MAME License. +// You can choose the license that has the most advantages for you. + +// SVN repository can be found at http://code.google.com/p/cyclone68000/ + +// Disa 68000 Disassembler + +#ifdef __cplusplus +extern "C" { +#endif + +#if defined(__GNUC__) || defined(_WIN32_WCE) +#define CPU_CALL +#else +#define CPU_CALL __fastcall +#endif + +extern unsigned int DisaPc; +extern char *DisaText; // Text buffer to write in + +extern unsigned short (CPU_CALL *DisaWord)(unsigned int a); +int DisaGetEa(char *t,int ea,int size); + +int DisaGet(); + +#ifdef __cplusplus +} // End of extern "C" +#endif diff --git a/Cyclone/Makefile b/Cyclone/Makefile index fd600ae..3202a98 100644 --- a/Cyclone/Makefile +++ b/Cyclone/Makefile @@ -1,7 +1,6 @@ CFLAGS += -Wall -ggdb -#LDFLAGS += -lstdc++ -OBJS = Main.o Ea.o OpAny.o OpArith.o OpBranch.o OpLogic.o OpMove.o ../Pico/Disa.o +OBJS = Main.o Ea.o OpAny.o OpArith.o OpBranch.o OpLogic.o OpMove.o Disa/Disa.o all: cyclone.s @@ -13,5 +12,3 @@ cyclone_gen: $(OBJS) clean: $(RM) $(OBJS) cyclone_gen cyclone.s - -# .PHONY: cyclone.s -- 2.39.2