dyninst* Label(bool_t DoPost)
{
dyninst* p = InstCreate(NULL,0,NONE,NONE,NONE,0,0);
if (p) p->Branch = 1;
if (DoPost) InstPost(p);
return p;
}
void PCMLoop(pcm_soft* p,bool_t Speed)
{
bool_t SrcPacked = !(p->Src.Flags & PCM_PLANES) && p->Src.Channels==2;
dyninst* Loop;
reg Left;
reg Right;
reg Shift;
if (!p->ActualDither && p->Shift)
I1C(MOVI,R13,p->Shift);
if (p->ActualDither)
if (Speed)
I2C(MOVL_STOFS,R7,SP,OFS(stack,Step)); // save backup
else
I1C(MOVI,R7,-p->Shift);
Loop = Label(1);
Left = R2;
if (p->UseLeft)
Right = R3;
else
Right = R2;
if (Speed)
{
I2(MOV,R8,R0);
IShift(R0,NONE,-8);
IShift(R0,NONE,p->SrcShift);
switch (p->Src.Bits)
{
case 8:
if (p->UseLeft)
I2(MOVB_LDR0,R9,Left);
if (p->UseRight)
I2(MOVB_LDR0,R10,Right);
if (p->SrcUnsigned)
{
I2(EXTUB,R2,R2);
if (p->SrcChannels>1)
I2(EXTUB,R3,R3);
}
break;
case 16:
if (p->UseLeft)
I2(MOVW_LDR0,R9,Left);
if (p->UseRight)
I2(MOVW_LDR0,R10,Right);
if (p->SrcUnsigned)
{
I2(EXTUW,R2,R2);
if (p->SrcChannels>1)
I2(EXTUW,R3,R3);
}
break;
case 32:
if (p->UseLeft)
I2(MOVL_LDR0,R9,Left);
if (p->UseRight)
I2(MOVL_LDR0,R10,Right);
break;
}
I2(ADD,R7,R8);
}
else
{
switch (p->Src.Bits)
{
case 8:
if (p->UseLeft)
{
I2(MOVB_LDADD,R9,Left);
if (SrcPacked && !p->UseRight) I1C(ADDI,R9,1);
}
if (p->UseRight)
if (SrcPacked)
{
if (!p->UseLeft) I1C(ADDI,R9,1);
I2(MOVB_LDADD,R9,Right);
}
else
I2(MOVB_LDADD,R10,Right);
if (p->SrcUnsigned)
{
I2(EXTUB,R2,R2);
if (p->SrcChannels>1)
I2(EXTUB,R3,R3);
}
break;
case 16:
if (p->UseLeft)
{
I2(MOVW_LDADD,R9,Left);
if (SrcPacked && !p->UseRight) I1C(ADDI,R9,2);
}
if (p->UseRight)
if (SrcPacked)
{
if (!p->UseLeft) I1C(ADDI,R9,2);
I2(MOVW_LDADD,R9,Right);
}
else
I2(MOVW_LDADD,R10,Right);
if (p->SrcUnsigned)
{
I2(EXTUW,R2,R2);
if (p->SrcChannels>1)
I2(EXTUW,R3,R3);
}
break;
case 32:
if (p->UseLeft)
{
I2(MOVL_LDADD,R9,Left);
if (SrcPacked && !p->UseRight) I1C(ADDI,R9,4);
}
if (p->UseRight)
if (SrcPacked)
{
if (!p->UseLeft) I1C(ADDI,R9,4);
I2(MOVL_LDADD,R9,Right);
}
else
I2(MOVL_LDADD,R10,Right);
break;
}
}
if (p->InstSrcUnsigned)
{
MB(); I1P(MOVL_PC,R0,p->InstSrcUnsigned,0);
I2(SUB,R0,R2);
if (p->SrcChannels>1)
I2(SUB,R0,R3);
}
else
if (p->SrcUnsigned == 128)
{
I1C(ADDI,R2,-128);
if (p->SrcChannels>1)
I1C(ADDI,R3,-128);
}
if (p->Stereo)
{
if ((p->Src.Flags ^ p->Dst.Flags) & PCM_SWAPPEDSTEREO)
{
Left = R3;
Right = R2;
}
else
{
Left = R2;
Right = R3;
}
}
else
{
if (p->Join)
I2(ADD,R3,R2);
Right = Left = R2;
}
if (p->ActualDither)
{
I2(ADD,R13,R2);
I2(MOV,R2,R13);
if (p->Stereo)
{
I2(ADD,R1,R3);
I2(MOV,R3,R1);
}
}
if (p->Clip>0)
{
dyninst* ClipMin = Label(0);
dyninst* ClipMax = Label(0);
I2(CMPGT,R2,R4);
I0P(BFS,ClipMin);
I2(CMPGT,R5,R2); // delay slot
I2(MOV,R4,R2);
InstPost(ClipMin);
I0P(BFS,ClipMax);
I1C(ADDI,R11,1<<p->DstShift); // delay slot
I2(MOV,R5,R2);
InstPost(ClipMax);
if (p->Stereo)
{
ClipMin = Label(0);
ClipMax = Label(0);
I2(CMPGT,R3,R4);
I0P(BFS,ClipMin);
I2(CMPGT,R5,R3); // delay slot
I2(MOV,R4,R3);
InstPost(ClipMin);
I0P(BFS,ClipMax);
I1C(ADDI,R12,1<<p->DstShift); // delay slot
I2(MOV,R5,R3);
InstPost(ClipMax);
}
else
if (p->Dst.Channels>1)
I1C(ADDI,R12,1<<p->DstShift); // delay slot
}
else
{
I1C(ADDI,R11,1<<p->DstShift);
if (p->Dst.Channels>1)
I1C(ADDI,R12,1<<p->DstShift);
}
I2(CMPEQ,R11,R14);
if (p->Shift)
{
if (p->ActualDither)
{
I1C(MOVI,R0,p->Shift);
Shift = R0;
}
else
Shift = R13;
I2(SHAD,Shift,R2);
if (p->Stereo) I2(SHAD,Shift,R3);
}
if (p->ActualDither)
{
if (Speed)
I1C(MOVI,R7,-p->Shift);
I2(MOV,R2,R0);
I2(SHAD,R7,R0);
I2(SUB,R0,R13);
if (p->Stereo)
{
I2(MOV,R3,R0);
I2(SHAD,R7,R0);
I2(SUB,R0,R1);
}
if (Speed)
I2C(MOVL_LDOFS,SP,R7,OFS(stack,Step));
}
if (p->InstDstUnsigned)
{
MB(); I1P(MOVL_PC,R0,p->InstDstUnsigned,0);
I1C(ADD,R0,Left);
if (Left != Right)
I1C(ADD,R0,Right);
}
else
if (p->DstUnsigned == 128)
{
// p->Dst.Bits=8 so doesn't matter if it's add or sub
I1C(ADDI,Left,-128);
if (Left != Right)
I1C(ADDI,Right,-128);
}
switch (p->Dst.Bits)
{
case 8:
I2(MOVB_ST,Left,R11);
if (p->Dst.Channels>1)
I2(MOVB_ST,Right,R12);
break;
case 16:
I2(MOVW_ST,Left,R11);
if (p->Dst.Channels>1)
I2(MOVW_ST,Right,R12);
break;
case 32:
I2(MOVL_ST,Left,R11);
if (p->Dst.Channels>1)
I2(MOVL_ST,Right,R12);
break;
}
DS(); I0P(BFS,Loop);
if (p->ActualDither)
{
I2(MOV,SP,R0);
I1C(ADDI,R0,OFS(stack,State));
I2(MOVL_LD,R0,R4);
I2C(MOVL_STOFS,R13,R4,OFS(pcmstate,Dither[0]));
I2C(MOVL_STOFS,R1,R4,OFS(pcmstate,Dither[1]));
}
CodeEnd(7,OFS(stack,StackFrame));
}
void PCMCompile(pcm_soft* p)
{
dyninst* Speed;
dyninst* Min = NULL;
dyninst* Max = NULL;
CodeBegin(7,OFS(stack,StackFrame));
p->InstSrcUnsigned = NULL;
p->InstDstUnsigned = NULL;
if (p->SrcUnsigned && p->SrcUnsigned != 128)
p->InstSrcUnsigned = InstCreate32(p->SrcUnsigned,NONE,NONE,NONE,0,0);
if (p->DstUnsigned && p->DstUnsigned != 128)
p->InstDstUnsigned = InstCreate32(p->DstUnsigned,NONE,NONE,NONE,0,0);
// dst pointers
I2C(MOVL_LDOFS,R5,R11,0);
I1C(ADDI,R11,-(1<<p->DstShift)); // back one step
if (p->Dst.Channels > 1)
{
if (p->Dst.Flags & PCM_PLANES)
{
I2C(MOVL_LDOFS,R5,R12,4);
I1C(ADDI,R12,-(1<<p->DstShift)); // back one step
}
else
{
I2(MOV,R11,R12);
I1C(ADDI,R12,1<<(p->DstShift-1));
}
}
I2(MOV,R7,R14);
I2(ADD,R11,R14); // dstend
// src pointers
I2C(MOVL_LDOFS,R6,R9,0);
if (p->Src.Channels > 1)
{
if (p->Src.Flags & PCM_PLANES)
I2C(MOVL_LDOFS,R6,R10,4);
else
{
I2(MOV,R9,R10);
I1C(ADDI,R10,p->Src.Bits>>3);
}
}
I2(MOV,SP,R0);
I1C(ADDI,R0,OFS(stack,State));
I2(MOVL_LD,R0,R4);
I2C(MOVL_LDOFS,R4,R7,OFS(pcmstate,Step));
I2C(MOVL_LDOFS,R4,R8,OFS(pcmstate,Pos));
/*
if (p->UseVolume)
{
I1C(ADDI,R0,OFS(stack,Volume)-OFS(stack,State));
I2(MOVL_LD,R0,R1);
}
*/
if (p->ActualDither)
{
I2C(MOVL_LDOFS,R4,R13,OFS(pcmstate,Dither[0]));
I2C(MOVL_LDOFS,R4,R1,OFS(pcmstate,Dither[1]));
}
if (p->Clip>0)
{
Min = InstCreate32(p->MinLimit,NONE,NONE,NONE,0,0);
Max = InstCreate32(p->MaxLimit,NONE,NONE,NONE,0,0);
I1P(MOVL_PC,R4,Min,0);
I1P(MOVL_PC,R5,Max,0);
}
Speed = Label(0);
I1C(MOVI,R2,64);
I1(SHLL2,R2);
I2(CMPEQ,R2,R7);
I0P(BF,Speed);
PCMLoop(p,0);
InstPost(Speed);
PCMLoop(p,1);
Align(4);
if (Min) InstPost(Min);
if (Max) InstPost(Max);
if (p->InstSrcUnsigned) InstPost(p->InstSrcUnsigned);
if (p->InstDstUnsigned) InstPost(p->InstDstUnsigned);
}
void Align(int i)
{
dyninst* p = InstCreate(NULL,-i,NONE,NONE,NONE,0,0);
if (p) p->Branch = 1;
InstPost(p);
}
