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Supermodel/Src/Sound/SCSPDSP.cpp

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/**
** Supermodel
** A Sega Model 3 Arcade Emulator.
** Copyright 2011 Bart Trzynadlowski, Nik Henson
**
** This file is part of Supermodel.
**
** Supermodel is free software: you can redistribute it and/or modify it under
** the terms of the GNU General Public License as published by the Free
** Software Foundation, either version 3 of the License, or (at your option)
** any later version.
**
** Supermodel is distributed in the hope that it will be useful, but WITHOUT
** ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
** FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
** more details.
**
** You should have received a copy of the GNU General Public License along
** with Supermodel. If not, see <http://www.gnu.org/licenses/>.
**/
/*
* SCSPDSP.cpp
*
* SCSP DSP emulation.
*/
#include "Supermodel.h"
#include "SCSPDSP.h"
//#include <assert.h>
#define assert(x) ; // disable assert() for releases
//#include <memory.h>
//#include <stdio.h>
//#include <malloc.h>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#pragma warning(disable:4311)
#define DYNBUF 0x10000
//this doesn't work at all
//#define USEFLOATPACK
//the PACK func in asm plus mov [esi],ax
unsigned char PackFunc[]={0x8B,0xD8,0xA9,0x00,0x00,0x80,0x00,0x75,0x02,0xF7,0xD3,0xF7,0xD3,0x0F,0xBD,0xCB,
0xF7,0xD9,0xC1,0xE0,0x08,0x83,0xC1,0x16,0xD3,0xE0,0xC1,0xF8,0x13,0xC1,0xE1,0x0B,
0x25,0xFF,0x87,0x00,0x00,0x0B,0xC1,0x66,0x89,0x06};
unsigned char UnpackFunc[]={0x8B,0xD8,0x8B,0xC8,0x81,0xE3,0x00,0x80,0x00,0x00,0x25,0xFF,0x07,
0x00,0x00,0xC1,0xE9,0x0B,0xC1,0xE0,0x0B,0xC1,0xE3,0x08,0x83,0xE1,0x0F,0x0B,0xC3,
0xD1,0xEB,0x81,0xF3,0x00,0x00,0x40,0x00,0x0B,0xC3,0x83,0xC1,0x08,0xC1,0xE0,0x08,
0xD3,0xF8};
#if 0
unsigned short inline PACK(signed int val)
{
/* signed int v1=val;
int n=0;
while(((v1>>22)&1) == ((v1>>23)&1))
{
v1<<=1;
++n;
}
v1<<=8;
v1>>=11+8;
v1=(v1&(~0x7800))|(n<<11);
return v1;
*/
#ifdef USEFLOATPACK
unsigned short f;
__asm
{
mov eax,val
mov ebx,eax
test eax,0x00800000
jne negval
not ebx
negval: not ebx
bsr ecx,ebx
neg ecx
shl eax,8
add ecx,22
shl eax,cl
sar eax,8+11
shl ecx,11
and eax,~0x7800
or eax,ecx
mov f,ax
}
return f;
#else
//cut to 16 bits
unsigned int f=((unsigned int ) val)>>8;
return f;
#endif
}
signed int inline UNPACK(unsigned short val)
{
/* if(val)
int a=1;
unsigned int mant=val&0x7ff;
unsigned int exp=(val>>11)&0xf;
unsigned int sign=(val>>15)&1;
signed int r=0;
r|=mant<<11;
r|=sign<<23;
r|=(sign^1)<<22;
//signed int r=val<<8;
//if(r&0x00800000)
// r|=0xFF000000;
r<<=8;
r>>=8+exp;
return r;
*/
#ifdef USEFLOATPACK
signed int r;
__asm
{
xor eax,eax
mov ax,val
mov ebx,eax
mov ecx,eax
and ebx,0x8000
and eax,0x07ff
shr ecx,11
shl eax,11
shl ebx,8
and ecx,0xF
or eax,ebx
shr ebx,1
xor ebx,0x00400000
or eax,ebx
add ecx,8
shl eax,8
sar eax,cl
mov r,eax
}
#else
//unpack 16->24
signed int r=val<<8;
r<<=8;
r>>=8;
#endif
return r;
}
#else
static signed short PACK(signed int val)
{
unsigned int temp;
int sign,exponent,k;
sign = (val >> 23) & 0x1;
temp = (val ^ (val << 1)) & 0xFFFFFF;
exponent = 0;
for (k=0; k<12; k++)
{
if (temp & 0x800000)
break;
temp <<= 1;
exponent += 1;
}
if (exponent < 12)
val = (val << exponent) & 0x3FFFFF;
else
val <<= 11;
val >>= 11;
val |= sign << 15;
val |= exponent << 11;
return (unsigned short)val;
}
static signed int UNPACK(unsigned short val)
{
int sign,exponent,mantissa;
signed int uval;
sign = (val >> 15) & 0x1;
exponent = (val >> 11) & 0xF;
mantissa = val & 0x7FF;
uval = mantissa << 11;
if (exponent > 11)
exponent = 11;
else
uval |= (sign ^ 1) << 22;
uval |= sign << 23;
uval <<= 8;
uval >>= 8;
uval >>= exponent;
return uval;
}
#endif
void SCSPDSP_Init(_SCSPDSP *DSP)
{
memset(DSP,0,sizeof(_SCSPDSP));
DSP->RBL=0x8000;
DSP->Stopped=true;
}
#ifndef DYNDSP
void SCSPDSP_Step(_SCSPDSP *DSP)
{
if(DSP->Stopped)
return;
signed int ACC=0; //26 bit
signed int SHIFTED=0; //24 bit
signed int X=0; //24 bit
signed int Y=0; //13 bit
signed int B=0; //26 bit
signed int INPUTS=0; //24 bit
signed int MEMVAL=0;
signed int FRC_REG=0; //13 bit
signed int Y_REG=0; //24 bit
unsigned int ADDR=0;
unsigned int ADRS_REG=0; //13 bit
memset(DSP->EFREG,0,2*16);
int dump=0;
FILE *f=NULL;
if(dump)
f=fopen("dsp.txt","wt");
for(int step=0;step</*128*/DSP->LastStep;++step)
{
unsigned short *IPtr=&(DSP->MPRO[step*4]);
// if(IPtr[0]==0 && IPtr[1]==0 && IPtr[2]==0 && IPtr[3]==0)
// break;
unsigned int TRA=(IPtr[0]>>8)&0x7F;
unsigned int TWT=(IPtr[0]>>7)&0x01;
unsigned int TWA=(IPtr[0]>>0)&0x7F;
unsigned int XSEL=(IPtr[1]>>15)&0x01;
unsigned int YSEL=(IPtr[1]>>13)&0x03;
unsigned int IRA=(IPtr[1]>>6)&0x3F;
unsigned int IWT=(IPtr[1]>>5)&0x01;
unsigned int IWA=(IPtr[1]>>0)&0x1F;
unsigned int TABLE=(IPtr[2]>>15)&0x01;
unsigned int MWT=(IPtr[2]>>14)&0x01;
unsigned int MRD=(IPtr[2]>>13)&0x01;
unsigned int EWT=(IPtr[2]>>12)&0x01;
unsigned int EWA=(IPtr[2]>>8)&0x0F;
unsigned int ADRL=(IPtr[2]>>7)&0x01;
unsigned int FRCL=(IPtr[2]>>6)&0x01;
unsigned int SHIFT=(IPtr[2]>>4)&0x03;
unsigned int YRL=(IPtr[2]>>3)&0x01;
unsigned int NEGB=(IPtr[2]>>2)&0x01;
unsigned int ZERO=(IPtr[2]>>1)&0x01;
unsigned int BSEL=(IPtr[2]>>0)&0x01;
unsigned int NOFL=(IPtr[3]>>15)&1; //????
unsigned int COEF=(IPtr[3]>>9)&0x3f;
unsigned int MASA=(IPtr[3]>>2)&0x1f; //???
unsigned int ADREB=(IPtr[3]>>1)&0x1;
unsigned int NXADR=(IPtr[3]>>0)&0x1;
//operations are done at 24 bit precision
if(MASA)
int a=1;
if(NOFL)
int a=1;
int dump=0;
if(f)
{
#define DUMP(v) fprintf(f," " #v ": %04X",v);
fprintf(f,"%d: ",step);
DUMP(ACC);
DUMP(SHIFTED);
DUMP(X);
DUMP(Y);
DUMP(B);
DUMP(INPUTS);
DUMP(MEMVAL);
DUMP(FRC_REG);
DUMP(Y_REG);
DUMP(ADDR);
DUMP(ADRS_REG);
fprintf(f,"\n");
}
//INPUTS RW
assert(IRA<0x32);
if(IRA<=0x1f)
INPUTS=DSP->MEMS[IRA];
else if(IRA<=0x2F)
INPUTS=DSP->MIXS[IRA-0x20]; //MIXS is 24 bit
else if(IRA<=0x31)
INPUTS=DSP->EXTS[IRA-0x30];
else INPUTS=0;
INPUTS<<=8;
INPUTS>>=8;
//if(INPUTS&0x00800000)
// INPUTS|=0xFF000000;
if(IWT)
{
DSP->MEMS[IWA]=MEMVAL; //MEMVAL was selected in previous MRD
if(IRA==IWA)
INPUTS=MEMVAL;
}
//Operand sel
//B
if(!ZERO)
{
if(BSEL)
B=ACC;
else
{
B=DSP->TEMP[(TRA+DSP->DEC)&0x7F];
B<<=8;
B>>=8;
//if(B&0x00800000)
// B|=0xFF000000; //Sign extend
}
if(NEGB)
B=0-B;
}
else
B=0;
//X
if(XSEL)
X=INPUTS;
else
{
X=DSP->TEMP[(TRA+DSP->DEC)&0x7F];
X<<=8;
X>>=8;
//if(X&0x00800000)
// X|=0xFF000000;
}
//Y
if(YSEL==0)
Y=FRC_REG;
else if(YSEL==1)
Y=DSP->COEF[COEF]>>3; //COEF is 16 bits
else if(YSEL==2)
Y=(Y_REG>>11)&0x1FFF;
else if(YSEL==3)
Y=(Y_REG>>4)&0x0FFF;
if(YRL)
Y_REG=INPUTS;
//Shifter
if(SHIFT==0)
{
SHIFTED=ACC;
if(SHIFTED>0x007FFFFF)
SHIFTED=0x007FFFFF;
if(SHIFTED<(-0x00800000))
SHIFTED=-0x00800000;
}
else if(SHIFT==1)
{
SHIFTED=ACC*2;
if(SHIFTED>0x007FFFFF)
SHIFTED=0x007FFFFF;
if(SHIFTED<(-0x00800000))
SHIFTED=-0x00800000;
}
else if(SHIFT==2)
{
SHIFTED=ACC*2;
SHIFTED<<=8;
SHIFTED>>=8;
//SHIFTED&=0x00FFFFFF;
//if(SHIFTED&0x00800000)
// SHIFTED|=0xFF000000;
}
else if(SHIFT==3)
{
SHIFTED=ACC;
SHIFTED<<=8;
SHIFTED>>=8;
//SHIFTED&=0x00FFFFFF;
//if(SHIFTED&0x00800000)
// SHIFTED|=0xFF000000;
}
//ACCUM
Y<<=19;
Y>>=19;
//if(Y&0x1000)
// Y|=0xFFFFF000;
INT64 v=(((INT64) X*(INT64) Y)>>12);
ACC=(int) v+B;
if(TWT)
DSP->TEMP[(TWA+DSP->DEC)&0x7F]=SHIFTED;
if(FRCL)
{
if(SHIFT==3)
FRC_REG=SHIFTED&0x0FFF;
else
FRC_REG=(SHIFTED>>11)&0x1FFF;
}
if(MRD || MWT)
//if(0)
{
ADDR=DSP->MADRS[MASA];
if(!TABLE)
ADDR+=DSP->DEC;
if(ADREB)
ADDR+=ADRS_REG&0x0FFF;
if(NXADR)
ADDR++;
if(!TABLE)
ADDR&=DSP->RBL-1;
else
ADDR&=0xFFFF;
//ADDR<<=1;
//ADDR+=DSP->RBP<<13;
//MEMVAL=DSP->SCSPRAM[ADDR>>1];
ADDR+=DSP->RBP<<12;
if(MWT && (step&1))
{
if(NOFL)
DSP->SCSPRAM[ADDR]=SHIFTED>>8;
else
DSP->SCSPRAM[ADDR]=PACK(SHIFTED);
}
if(MRD && (step&1)) //memory only allowed on odd? DoA inserts NOPs on even
{
if(NOFL)
MEMVAL=DSP->SCSPRAM[ADDR]<<8;
else
MEMVAL=UNPACK(DSP->SCSPRAM[ADDR]);
if(MEMVAL)
int a=1;
}
}
if(ADRL)
{
if(SHIFT==3)
ADRS_REG=(SHIFTED>>12)&0xFFF;
else
ADRS_REG=(INPUTS>>16);
}
if(EWT)
DSP->EFREG[EWA]+=SHIFTED>>8;
}
--DSP->DEC;
memset(DSP->MIXS,0,4*16);
if(f)
fclose(f);
}
#else
FILE *f=NULL;
void SCSPDSP_Step(_SCSPDSP *DSP)
{
if(DSP->Stopped)
return;
memset(DSP->EFREG,0,2*16);
assert(DSP->DoSteps!=NULL);
int dump=0;
if(dump)
f=fopen("dsp2.txt","wt");
DSP->DoSteps();
if(f)
{
fclose(f);
f=NULL;
}
--DSP->DEC;
memset(DSP->MIXS,0,4*16);
}
void __fastcall dumpreg(_SCSPDSP *DSP)
{
static int n=0;
//f=fopen("dsp2.txt","a+t");
if(f)
{
#define DUMP(v) fprintf(f," " #v ": %04X",DSP->v);
fprintf(f,"%d: ",n++);
DUMP(ACC);
DUMP(SHIFTED);
DUMP(X);
DUMP(Y);
DUMP(B);
DUMP(INPUTS);
DUMP(MEMVAL);
DUMP(FRC_REG);
DUMP(Y_REG);
DUMP(ADDR);
DUMP(ADRS_REG);
fprintf(f,"\n");
}
}
#define EMIT8(x) *PtrInsts=x; ++PtrInsts;
#define EMIT16(x) *((unsigned short *) PtrInsts)=x; PtrInsts+=2;
#define EMIT32(x) *((unsigned int *) PtrInsts)=x; PtrInsts+=4;
#define MOV_EAXTOMEM(addr) EMIT8(0xA3); EMIT32((unsigned int) addr);
#define MOV_MEMTOEAX(addr) EMIT8(0xA1); EMIT32((unsigned int) addr);
#define MOV_MEMTOAX(addr) EMIT8(0x66); EMIT8(0xA1); EMIT32((unsigned int) addr);
#define MOV_MEMTOEBX(addr) EMIT8(0x8B); EMIT8(0x1D); EMIT32((unsigned int) addr);
#define ADD_MEMTOEAX(addr) EMIT8(0x03); EMIT8(0x05); EMIT32((unsigned int) addr);
#define ADD_EAXTOMEM(addr) EMIT8(0x01); EMIT8(0x05); EMIT32((unsigned int) addr);
#define ADD_AXTOMEM(addr) EMIT8(0x66); EMIT8(0x01); EMIT8(0x05); EMIT32((unsigned int) addr);
#define MOV_IMMTOEAX(imm) EMIT8(0xB8); EMIT32((unsigned int) imm);
#define MOV_IMMTOECX(imm) EMIT8(0xB9); EMIT32((unsigned int) imm);
#define ADD_IMMTOEAX(imm) EMIT8(0x05); EMIT32((unsigned int) imm);
#define ADD_EBXTOEAX() EMIT8(0x03); EMIT8(0xC3);
#define CMP_IMMTOEAX(imm) EMIT8(0x3D); EMIT32((unsigned int) imm);
#define MOV_0TOEAX() EMIT8(0x33); EMIT8(0xC0);
#define MOV_EAXTOEBX() EMIT8(0x8B); EMIT8(0xD8);
#define MOV_EAXTOECX() EMIT8(0x8B); EMIT8(0xC8);
#define NEG_EAX() EMIT8(0xF7); EMIT8(0xD8);
#define INC_EAX() EMIT8(0x40);
#define MOV_MEMEAXTOEAX() EMIT8(0x8b); EMIT8(0x00);
#define MOV_MEMEAXTOAX() EMIT8(0x66); EMIT8(0x8b); EMIT8(0x00);
#define MOV_EBXTOMEMEAX() EMIT8(0x89); EMIT8(0x18);
#define MOV_EAXTOMEMEBX() EMIT8(0x89); EMIT8(0x03);
#define MOV_AXTOMEMEBX() EMIT8(0x66); EMIT8(0x89); EMIT8(0x03);
#define SHL_EAX(count) EMIT8(0xC1); EMIT8(0xE0); EMIT8(count);
#define SHL_EBX(count) EMIT8(0xC1); EMIT8(0xE3); EMIT8(count);
#define SHL_EDX(count) EMIT8(0xC1); EMIT8(0xE2); EMIT8(count);
#define SHRD_EAX_EDX(count) EMIT8(0x0F); EMIT8(0xAC); EMIT8(0xD0); EMIT8(count);
#define SAR_EAX(count) EMIT8(0xC1); EMIT8(0xF8); EMIT8(count);
#define SHR_EAX(count) EMIT8(0xC1); EMIT8(0xE8); EMIT8(count);
#define AND_EAX(mask) EMIT8(0x25); EMIT32(mask);
#define AND_EBX(mask) EMIT8(0x81); EMIT8(0xE3); EMIT32(mask);
#define AND_EAX_EBX() EMIT8(0x23); EMIT8(0xC3);
#define DEC_EBX() EMIT8(0x4B);
#define OR_EAX_EDX() EMIT8(0x0B); EMIT8(0xC2);
#define ADD_EAX_ECX() EMIT8(0x03); EMIT8(0xC1);
#define IMUL_EAX_EBX() EMIT8(0xF7); EMIT8(0xEB);
//#define IMUL_EAX_EBX() EMIT8(0xF7); EMIT8(0xE3);
#define RET() EMIT8(0xC3);
#define PUSHA() EMIT8(0x51); EMIT8(0x52); EMIT8(0x53); EMIT8(0x56); //ecx edx ebx esi
#define POPA() EMIT8(0x5E); EMIT8(0x5B); EMIT8(0x5A); EMIT8(0x59); //esi ebx edx ecx
struct _INST
{
unsigned int TRA;
unsigned int TWT;
unsigned int TWA;
unsigned int XSEL;
unsigned int YSEL;
unsigned int IRA;
unsigned int IWT;
unsigned int IWA;
unsigned int TABLE;
unsigned int MWT;
unsigned int MRD;
unsigned int EWT;
unsigned int EWA;
unsigned int ADRL;
unsigned int FRCL;
unsigned int SHIFT;
unsigned int YRL;
unsigned int NEGB;
unsigned int ZERO;
unsigned int BSEL;
unsigned int NOFL;
unsigned int COEF;
unsigned int MASA;
unsigned int ADREB;
unsigned int NXADR;
};
void DecodeInst(unsigned short *IPtr,_INST *i)
{
i->TRA=(IPtr[0]>>8)&0x7F;
i->TWT=(IPtr[0]>>7)&0x01;
i->TWA=(IPtr[0]>>0)&0x7F;
i->XSEL=(IPtr[1]>>15)&0x01;
i->YSEL=(IPtr[1]>>13)&0x03;
i->IRA=(IPtr[1]>>6)&0x3F;
i->IWT=(IPtr[1]>>5)&0x01;
i->IWA=(IPtr[1]>>0)&0x1F;
i->TABLE=(IPtr[2]>>15)&0x01;
i->MWT=(IPtr[2]>>14)&0x01;
i->MRD=(IPtr[2]>>13)&0x01;
i->EWT=(IPtr[2]>>12)&0x01;
i->EWA=(IPtr[2]>>8)&0x0F;
i->ADRL=(IPtr[2]>>7)&0x01;
i->FRCL=(IPtr[2]>>6)&0x01;
i->SHIFT=(IPtr[2]>>4)&0x03;
i->YRL=(IPtr[2]>>3)&0x01;
i->NEGB=(IPtr[2]>>2)&0x01;
i->ZERO=(IPtr[2]>>1)&0x01;
i->BSEL=(IPtr[2]>>0)&0x01;
i->NOFL=(IPtr[3]>>15)&1; //????
i->COEF=(IPtr[3]>>9)&0x3f;
i->MASA=(IPtr[3]>>2)&0x1f; //???
i->ADREB=(IPtr[3]>>1)&0x1;
i->NXADR=(IPtr[3]>>0)&0x1;
}
#define USES_SHIFTED(inst) (inst.TWT || inst.FRCL || inst.MWT || inst.ADRL || inst.EWT)
void SCSPDSP_Recompile(_SCSPDSP *DSP)
{
if(DSP->DoSteps)
free(DSP->DoSteps);
DSP->DoSteps=(void (*)()) malloc(DYNBUF);
unsigned char *PtrInsts=(unsigned char *)DSP->DoSteps;
PUSHA();
for(int step=0;step</*128*/DSP->LastStep;++step)
{
unsigned short *IPtr=&(DSP->MPRO[step*4]);
_INST ThisInst,NextInst;
DecodeInst(IPtr,&ThisInst);
DecodeInst(IPtr+4,&NextInst);
EMIT8(0x90);
MOV_IMMTOECX(DSP);
MOV_IMMTOEAX(dumpreg);
EMIT8(0xFF); EMIT8(0xD0);
//INPUTS RW
assert(ThisInst.IRA<0x32);
if((ThisInst.XSEL || ThisInst.YRL || ThisInst.ADRL) || !DYNOPT)
{
if(ThisInst.IRA<=0x1f)
{
//INPUTS=DSP->MEMS[IRA];
MOV_MEMTOEAX(&(DSP->MEMS[ThisInst.IRA]));
SHL_EAX(8);
}
else if(ThisInst.IRA<=0x2F)
{
//INPUTS=DSP->MIXS[IRA-0x20]<<8; //MIXS is 16 bit
MOV_MEMTOEAX(&(DSP->MIXS[ThisInst.IRA-0x20]));
SHL_EAX(8);
}
else if(ThisInst.IRA<=0x31)
{
MOV_MEMTOEAX(&(DSP->EXTS[ThisInst.IRA-0x30]));
SHL_EAX(8);
}
else
{
MOV_0TOEAX();
}
SAR_EAX(8);
MOV_EAXTOMEM(&(DSP->INPUTS));
}
if(ThisInst.IWT)
{
MOV_MEMTOEAX(&DSP->MEMVAL);
MOV_EAXTOMEM(&DSP->MEMS[ThisInst.IWA]);
//DSP->MEMS[IWA]=MEMVAL; //MEMVAL was selected in previous MRD
if(ThisInst.IRA==ThisInst.IWA)
{
//INPUTS=MEMVAL;
MOV_EAXTOMEM(&DSP->INPUTS);
}
}
if((USES_SHIFTED(NextInst) || NextInst.BSEL) || !DYNOPT)
{
//Operand sel
//B
if(!ThisInst.ZERO)
{
if(ThisInst.BSEL)
{
//B=ACC;
MOV_MEMTOEAX(&DSP->ACC);
// MOV_EAXTOMEM(&DSP->B); //
}
else
{
MOV_IMMTOEAX(ThisInst.TRA);
ADD_MEMTOEAX(&(DSP->DEC));
AND_EAX(0x7F);
SHL_EAX(2);
ADD_IMMTOEAX(&(DSP->TEMP));
MOV_MEMEAXTOEAX();
SHL_EAX(8);
SAR_EAX(8);
// MOV_EAXTOMEM(&DSP->B); //
//B=DSP->TEMP[(TRA+DSP->DEC)&0x7F];
//B<<=8;
//B>>=8;
//if(B&0x00800000)
// B|=0xFF000000; //Sign extend
}
if(ThisInst.NEGB)
{
//B=0-B;
NEG_EAX();
}
}
else
{
MOV_0TOEAX();
}
//MOV_EAXTOMEM(&DSP->B);
MOV_EAXTOECX();
//X
if(ThisInst.XSEL)
{
//X=INPUTS;
MOV_MEMTOEAX(&DSP->INPUTS);
// MOV_EAXTOMEM(&DSP->X); //
}
else
{
//X=DSP->TEMP[(TRA+DSP->DEC)&0x7F];
//X<<=8;
//X>>=8;
MOV_IMMTOEAX(ThisInst.TRA);
ADD_MEMTOEAX(&(DSP->DEC));
AND_EAX(0x7F);
SHL_EAX(2);
ADD_IMMTOEAX(&(DSP->TEMP));
MOV_MEMEAXTOEAX();
SHL_EAX(8);
SAR_EAX(8);
//if(X&0x00800000)
// X|=0xFF000000;
// MOV_EAXTOMEM(&DSP->X); //
}
MOV_EAXTOEBX();
}
//if(TWT || /*MRD ||*/ MWT || EWT || ADRL || FRCL)
if(USES_SHIFTED(ThisInst) || !DYNOPT)
{
if(ThisInst.SHIFT==0)
{
MOV_MEMTOEAX(&DSP->ACC);
CMP_IMMTOEAX(0x007FFFFF);
EMIT8(0x7E); EMIT8(0x05); //JLE
MOV_IMMTOEAX(0x007FFFFF);
CMP_IMMTOEAX(0xFF800000);
EMIT8(0x7D); EMIT8(0x05); //JGE
MOV_IMMTOEAX(0xFF800000);
//SHIFTED=ACC;
//if(SHIFTED>0x007FFFFF)
// SHIFTED=0x007FFFFF;
//if(SHIFTED<(-0x00800000))
// SHIFTED=-0x00800000;
}
else if(ThisInst.SHIFT==1)
{
//SHIFTED=ACC*2;
MOV_MEMTOEAX(&DSP->ACC);
SHL_EAX(1);
CMP_IMMTOEAX(0x007FFFFF);
EMIT8(0x7E); EMIT8(0x05); //JLE
MOV_IMMTOEAX(0x007FFFFF);
CMP_IMMTOEAX(0xFF800000);
EMIT8(0x7D); EMIT8(0x05); //JGE
MOV_IMMTOEAX(0xFF800000);
//if(SHIFTED>0x007FFFFF)
// SHIFTED=0x007FFFFF;
//if(SHIFTED<(-0x00800000))
// SHIFTED=-0x00800000;
}
else if(ThisInst.SHIFT==2)
{
//SHIFTED=ACC*2;
//SHIFTED<<=8;
//SHIFTED>>=8;
MOV_MEMTOEAX(&DSP->ACC);
SHL_EAX(9);
SAR_EAX(8);
//SHIFTED&=0x00FFFFFF;
//if(SHIFTED&0x00800000)
// SHIFTED|=0xFF000000;
}
else if(ThisInst.SHIFT==3)
{
//SHIFTED=ACC;
//SHIFTED<<=8;
//SHIFTED>>=8;
MOV_MEMTOEAX(&DSP->ACC);
SHL_EAX(8);
SAR_EAX(8);
//SHIFTED&=0x00FFFFFF;
//if(SHIFTED&0x00800000)
// SHIFTED|=0xFF000000;
}
MOV_EAXTOMEM(&DSP->SHIFTED);
}
if((USES_SHIFTED(NextInst) || NextInst.BSEL) || !DYNOPT)
{
//Y
if(ThisInst.YSEL==0)
{
//Y=FRC_REG;
MOV_MEMTOEAX(&DSP->FRC_REG);
}
else if(ThisInst.YSEL==1)
{
//MOV_0TOEAX();
MOV_MEMTOAX(&DSP->COEF[ThisInst.COEF]);
SAR_EAX(3);
//Y=DSP->COEF[COEF]>>3; //COEF is 16 bits
}
else if(ThisInst.YSEL==2)
{
//Y=(Y_REG>>11)&0x1FFF;
MOV_MEMTOEAX(&DSP->Y_REG);
SAR_EAX(11);
AND_EAX(0x1FFF);
}
else if(ThisInst.YSEL==3)
{
//Y=(Y_REG>>4)&0x0FFF;
MOV_MEMTOEAX(&DSP->Y_REG);
SAR_EAX(4);
AND_EAX(0x0FFF);
}
SHL_EAX(19);
SAR_EAX(19);
// MOV_EAXTOMEM(&DSP->Y); //
//X:EBX
//B:ECX
//Y:EAX
IMUL_EAX_EBX();
// SHR_EAX(12);
// SHL_EDX((32-12));
SHRD_EAX_EDX(12);
ADD_EAX_ECX();
MOV_EAXTOMEM(&DSP->ACC);
}
if(ThisInst.YRL)
{
MOV_MEMTOEAX(&DSP->INPUTS);
MOV_EAXTOMEM(&DSP->Y_REG);
//Y_REG=INPUTS;
}
if(ThisInst.TWT)
{
MOV_MEMTOEAX(&DSP->SHIFTED);
MOV_EAXTOEBX();
//DSP->TEMP[(TWA+DSP->DEC)&0x7F]=SHIFTED;
MOV_IMMTOEAX(ThisInst.TWA);
ADD_MEMTOEAX(&(DSP->DEC));
AND_EAX(0x7F);
SHL_EAX(2);
ADD_IMMTOEAX(&(DSP->TEMP));
MOV_EBXTOMEMEAX();
}
if(ThisInst.FRCL)
{
if(ThisInst.SHIFT==3)
{
//FRC_REG=SHIFTED&0x0FFF;
MOV_MEMTOEAX(&DSP->SHIFTED);
AND_EAX(0x0FFF);
MOV_EAXTOMEM(&DSP->FRC_REG);
}
else
{
//FRC_REG=(SHIFTED>>11)&0x1FFF;
MOV_MEMTOEAX(&DSP->SHIFTED);
SHR_EAX(11);
AND_EAX(0x1FFF);
MOV_EAXTOMEM(&DSP->FRC_REG);
}
}
//MEM
if(ThisInst.MRD || ThisInst.MWT)
//if(0)
{
MOV_0TOEAX();
MOV_MEMTOAX(&DSP->MADRS[ThisInst.MASA]);
//ADDR=DSP->MADRS[MASA];
if(!ThisInst.TABLE)
{
//ADDR+=DSP->DEC;
//ADD_MEMTOEAX(&DSP->DEC);
MOV_MEMTOEBX(&DSP->DEC);
ADD_EBXTOEAX();
}
if(ThisInst.ADREB)
{
MOV_MEMTOEBX(&(DSP->ADRS_REG));
AND_EBX(0x0FFF);
ADD_EBXTOEAX();
//ADDR+=ADRS_REG&0x0FFF;
}
if(ThisInst.NXADR)
{
//ADDR++;
INC_EAX();
}
if(!ThisInst.TABLE)
{
MOV_MEMTOEBX(&(DSP->RBL));
DEC_EBX();
//ADDR&=DSP->RBL-1;
AND_EAX_EBX();
//AND_EAX((DSP->RBL-1));
}
else
{
//ADDR&=0xFFFF;
AND_EAX(0xFFFF);
}
//ADDR+=DSP->RBP<<12;
MOV_MEMTOEBX(&(DSP->RBP));
SHL_EBX(12);
ADD_EBXTOEAX();
assert(!(ThisInst.MRD && ThisInst.MWT)); //this shouldn't happen, read & write in the same cycle
if(ThisInst.MWT && (step&1))
{
if(ThisInst.NOFL)
{
SHL_EAX(1);
ADD_IMMTOEAX(DSP->SCSPRAM);
MOV_EAXTOEBX();
MOV_MEMTOEAX(&DSP->SHIFTED);
SHR_EAX(8);
MOV_AXTOMEMEBX();
//DSP->SCSPRAM[ADDR]=SHIFTED>>8;
}
else
{
#ifdef USEFLOATPACK
SHL_EAX(1);
ADD_IMMTOEAX(DSP->SCSPRAM);
EMIT8(0x8B); EMIT8(0xF0); //mov esi,eax
MOV_MEMTOEAX(&DSP->SHIFTED);
SHR_EAX(8);
memcpy(PtrInsts,PackFunc,sizeof(PackFunc));
PtrInsts+=sizeof(PackFunc);
#else
SHL_EAX(1);
ADD_IMMTOEAX(DSP->SCSPRAM);
MOV_EAXTOEBX();
MOV_MEMTOEAX(&DSP->SHIFTED);
SHR_EAX(8);
MOV_AXTOMEMEBX();
#endif
//DSP->SCSPRAM[ADDR]=PACK(SHIFTED);
}
}
if(ThisInst.MRD && (step&1)) //memory only allowed on odd? DoA inserts NOPs on even
{
if(ThisInst.NOFL)
{
//MEMVAL=DSP->SCSPRAM[ADDR]<<8;
SHL_EAX(1);
ADD_IMMTOEAX(DSP->SCSPRAM);
MOV_MEMEAXTOAX();
SHL_EAX(8);
//MOV_EAXTOMEM(&DSP->MEMVAL);
}
else
{
//MEMVAL=UNPACK(DSP->SCSPRAM[ADDR]);
SHL_EAX(1);
ADD_IMMTOEAX(DSP->SCSPRAM);
MOV_MEMEAXTOAX();
#ifdef USEFLOATPACK
memcpy(PtrInsts,UnpackFunc,sizeof(UnpackFunc));
PtrInsts+=sizeof(UnpackFunc);
#else
SHL_EAX(16);
SAR_EAX(8);
#endif
MOV_EAXTOMEM(&DSP->MEMVAL);
}
}
}
if(ThisInst.ADRL)
{
if(ThisInst.SHIFT==3)
{
MOV_MEMTOEAX(&DSP->SHIFTED);
SAR_EAX(12);
AND_EAX(0xFFF);
MOV_EAXTOMEM(&DSP->ADRS_REG);
//ADRS_REG=(SHIFTED>>12)&0xFFF;
}
else
{
MOV_MEMTOEAX(&DSP->INPUTS);
SAR_EAX(16);
MOV_EAXTOMEM(&DSP->ADRS_REG);
//ADRS_REG=(INPUTS>>16);
}
}
if(ThisInst.EWT)
{
MOV_MEMTOEAX(&DSP->SHIFTED);
SAR_EAX(8);
ADD_AXTOMEM(&DSP->EFREG[ThisInst.EWA]);
//DSP->EFREG[EWA]+=SHIFTED>>8;
}
// EMIT8(0x90);
// EMIT8(0xCC);
}
POPA();
RET();
FILE *f=fopen("dsp.rec","wb");
fwrite(DSP->DoSteps,1,PtrInsts-(unsigned char *)DSP->DoSteps,f);
fclose(f);
}
#endif
void SCSPDSP_SetSample(_SCSPDSP *DSP,signed int sample,int SEL,int MXL)
{
// if(MXL!=6)
// return;
//16 to 24
DSP->MIXS[SEL]+=sample<<(MXL+1)/*7*/;
// DSP->MIXS[SEL]+=sample<<7;
if(MXL)
{
int a=1;
if(MXL!=6)
int a=1;
}
}
void SCSPDSP_Start(_SCSPDSP *DSP)
{
int i;
DSP->Stopped=false;
for(i=127;i>=0;--i)
{
unsigned short *IPtr=&(DSP->MPRO[i*4]);
if(IPtr[0]!=0 || IPtr[1]!=0 || IPtr[2]!=0 || IPtr[3]!=0)
break;
}
DSP->LastStep=i+1;
/*
int test=0;
if(test)
{
//test
FILE *f1;
f1=fopen("MPRO","wb");
fwrite(DSP->MPRO,128*4*2,1,f1);
fwrite(DSP->COEF,64*2,1,f1);
fwrite(DSP->MADRS,32*2,1,f1);
fclose(f1);
}
*/
for(int t=0;t<0x10000;++t)
{
signed int unp=UNPACK(t);
unsigned short t2=PACK(unp);
if(t2!=t)
int a=1;
}
#ifdef DYNDSP
SCSPDSP_Recompile(DSP);
#endif
}
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