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code review and optimizations

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git-svn-id: file:///home/notaz/opt/svn/PicoDrive@180 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2007-07-03 19:23:12 +00:00
parent 3a5e6cf847
commit 85a36a57a8
10 changed files with 540 additions and 364 deletions
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85
cpu/Cyclone/Disa/Disa.c
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@ -39,7 +39,7 @@ int DisaGetEa(char *t,int ea,int size)
// 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';
@ -70,7 +70,7 @@ int DisaGetEa(char *t,int ea,int size)
// 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);
@ -225,7 +225,7 @@ static int DisaMove(int op)
sea = op&0x003f;
DisaGetEa(seat,sea,size);
dea =(op&0x01c0)>>3;
dea|=(op&0x0e00)>>9;
DisaGetEa(deat,dea,size);
@ -272,6 +272,21 @@ static int DisaMoveSr(int op)
return 0;
}
static int OpChk(op)
{
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,"chk %s, %s",seat,deat);
return 0;
}
// ================ Opcodes 0x41c0+ ================
static int DisaLea(int op)
{
@ -300,7 +315,7 @@ static int MakeRegList(char *list,int mask,int ea)
for (i=0;i<17;i++)
{
int bit=0;
// Mask off bit i:
if (reverse) bit=0x8000>>i; else bit=1<<i;
bit&=mask;
@ -322,7 +337,21 @@ static int MakeRegList(char *list,int mask,int ea)
// Knock off trailing '/'
len=strlen(list);
if (len>0) if (list[len-1]=='/') list[len-1]=0;
if (len>0) if (list[len-1]=='/') list[len-1]=0;
return 0;
}
// ================ Opcodes 0x4800+ ================
static int DisaNbcd(int op)
{
// Nbcd 01001000 00eeeeee (eeeeee=ea)
int ea=0;
char eat[64]="";
ea=op&0x003f;
DisaGetEa(eat,ea,0);
sprintf(DisaText,"nbcd %s",eat);
return 0;
}
@ -337,7 +366,7 @@ static int DisaSwap(int op)
// ================ Opcodes 0x4850+ ================
static int DisaPea(int op)
{
// Pea 01001000 01eeeeee (eeeeee=ea) pea
// Pea 01001000 01eeeeee (eeeeee=ea) pea
int ea=0;
char eat[64]="";
@ -445,7 +474,7 @@ static int Disa4E70(int op)
sprintf(DisaText,"%s",inst[n]);
//todo - 'stop' with 16 bit data
return 0;
}
@ -465,6 +494,19 @@ static int DisaTst(int op)
return 0;
}
static int DisaTas(int op)
{
// Tas 01001010 11eeeeee (eeeeee=ea)
int ea=0;
char eat[64]="";
ea=op&0x003f;
DisaGetEa(eat,ea,0);
sprintf(DisaText,"tas %s",eat);
return 0;
}
// ================ Opcodes 0x4e80+ ================
static int DisaJsr(int op)
{
@ -684,6 +726,23 @@ static int DisaCmpEor(int op)
return 0;
}
static int DisaCmpm(int op)
{
char seat[64]="",deat[64]="";
int type=0,size=0,sea,dea;
type=(op>>8)&1;
size=(op>>6)&3; if (size>=3) return 1;
sea=(op&7)|0x18;
dea=(op>>9)&0x3f;
DisaGetEa(seat,sea,size);
DisaGetEa(deat,dea,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
@ -708,14 +767,16 @@ static int DisaExg(int op)
static int DisaAddx(int op)
{
// 1t01ddd1 xx000sss addx
int type=0,size=0,dea=0,sea=0;
int type=0,size=0,dea=0,sea=0,mem;
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;
sea = op&7;
mem = op&8;
if(mem) { sea+=0x20; dea+=0x20; }
DisaGetEa(deat,dea,size);
DisaGetEa(seat,sea,size);
@ -749,7 +810,7 @@ static int DisaAsr(int op)
static int DisaAsrEa(int op)
{
// Asr/l/Ror/l etc EA - 11100ttd 11eeeeee
// Asr/l/Ror/l etc EA - 11100ttd 11eeeeee
int type=0,dir=0,size=1;
char eat[64]="";
@ -772,13 +833,16 @@ static int TryOp(int 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&0xf140)==0x4100) OpChk(op);
if ((op&0xf1c0)==0x41c0) DisaLea(op);
if ((op&0xf9c0)==0x40c0) DisaMoveSr(op);
if ((op&0xffc0)==0x4800) DisaNbcd(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&0xffc0)==0x4ac0) DisaTas(op);
if ((op&0xfff0)==0x4e40) DisaTrap(op);
if ((op&0xfff8)==0x4e50) DisaLink(op);
if ((op&0xfff8)==0x4e58) DisaUnlk(op);
@ -796,6 +860,7 @@ static int TryOp(int 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);