📄 blit_arm_half.c
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/*****************************************************************************
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* $Id: blit_arm_half.c 543 2006-01-07 22:06:24Z picard $
*
* The Core Pocket Media Player
* Copyright (c) 2004-2005 Gabor Kovacs
*
****************************************************************************/
#include "../common.h"
#include "../dyncode/dyncode.h"
#include "blit_soft.h"
// DstAlignSize 4
// DstAlignPos 4
// SrcAlignPos 2
#if defined(ARM)
typedef struct stack
{
int EndOfLine;
int EndOfRect;
int DstPitch;
int DstNext;
int SrcNext;
int UVNext;
int StackFrame[STACKFRAME];
//void* this R0
//char* Dst R1
//char* Src R2
//int DstPitch R3 can be signed
int SrcPitch; //can be signed
int Width;
int Height;
int Src2SrcLast;
} stack;
// R0 result RGB
// R1..R3 R,G,B accumulator
// R4..R6 temporary
// R7 EndOfLine
// R8 DstPitch
// R9 Dst
// R10 U
// R11 V
// R12 Y
// R14 UVPitch (same as YPitch/2)
static NOINLINE void Half_RGB_UV_Pixel(blit_soft* p, int No)
{
bool_t NextSub;
bool_t NextX;
int SatBit = p->QAdd ? 32 : 24;
int RPos = p->DstPos[0];
int GPos = p->DstPos[1];
int BPos = p->DstPos[2];
int NextLoad;
// 3 <- 2
// | ^
// v |
// 0 -> 1
switch (No)
{
default:
case 0: NextSub = 0; NextX = 1; p->Upper = 0; break;
case 1: NextSub = 1; NextX = 0; p->Upper = 1; break;
case 2: NextSub = 1; NextX = 1; p->Upper = 1; break;
case 3: NextSub = 0; NextX = 0; p->Upper = 0; break;
}
if (p->DirX<0)
p->Upper = !p->Upper;
if (p->SwapXY)
{
if (!NextX) NextSub = !NextSub;
NextX = !NextX;
}
if (p->Upper && p->DstBPP<=16)
{
RPos += p->DstBPP;
GPos += p->DstBPP;
BPos += p->DstBPP;
}
if (p->FX.Flags & BLITFX_DITHER)
{
IConst(R4,p->_RAdd);
IConst(R5,p->_GAdd);
IConst(R6,p->_BAdd);
I3S(ADD,R1,R4,R1,LSR,32-SatBit+p->DstSize[0]);
I3S(ADD,R2,R5,R2,LSR,32-SatBit+p->DstSize[1]);
I3S(ADD,R3,R6,R3,LSR,32-SatBit+p->DstSize[2]);
}
else
{
IConst(R1,p->_RAdd);
IConst(R2,p->_GAdd);
IConst(R3,p->_BAdd);
}
NextLoad = NextSub ? LDR_POSTSUB : LDR_POST;
if (p->ArithStretch)
{
// sum a 2x2 block of Y
if (NextX)
{
MB(); Byte(); I3S(LDR_POST,R4,R12,R14,LSL,1); //y00
MB(); Byte(); I2C(LDR_POST,R6,R12,1); //y10
MB(); Byte(); I3S(LDR_POSTSUB,R5,R12,R14,LSL,1); //y11
I3(ADD,R4,R4,R6);
Byte(); I2C(NextLoad,R6,R12,NextSub?3:1); //y01
I3(ADD,R4,R4,R5);
I3(ADD,R4,R4,R6);
}
else
{
MB(); Byte(); I2C(LDR_POST,R4,R12,1); //y00
MB(); Byte(); I3S(LDR_POST,R6,R12,R14,LSL,1); //y01
MB(); Byte(); I2C(LDR_POSTSUB,R5,R12,1); //y11
I3(ADD,R4,R4,R6);
Byte(); I3S(NextLoad,R6,R12,R14,LSL,1); //y10
I3(ADD,R4,R4,R5);
if (NextSub) I3S(SUB,R12,R12,R14,LSL,2);
I3(ADD,R4,R4,R6);
}
MB(); IConst(R5,p->_YMul >> 2);
}
else
{
MB(); Byte();
if (NextX)
I2C(NextLoad,R4,R12,2); //y
else
I3S(NextLoad,R4,R12,R14,LSL,2); //y
IConst(R5,p->_YMul);
}
I4(MLA,R1,R5,R4,R1);
I4(MLA,R2,R5,R4,R2);
I4(MLA,R3,R5,R4,R3);
if (NextX)
{
MB(); Byte(); I2C(NextLoad,R6,R11,1); //v
MB(); Byte(); I2C(NextLoad,R4,R10,1); //u
}
else
{
MB(); Byte(); I3(NextLoad,R6,R11,R14); //v
MB(); Byte(); I3(NextLoad,R4,R10,R14); //u
}
IConst(R5,p->_GVMul);
I4(MLA,R2,R5,R6,R2);
IConst(R5,p->_RVMul);
I4(MLA,R1,R5,R6,R1);
IConst(R5,p->_GUMul);
I4(MLA,R2,R5,R4,R2);
IConst(R5,p->_BUMul);
I4(MLA,R3,R5,R4,R3);
if (p->QAdd)
{
I3(QDADD,R1,R1,R1);
I3(QDADD,R2,R2,R2);
I3(QDADD,R3,R3,R3);
}
else
{
I2C(TST,NONE,R1,0xFF000000);
C(NE);I2C(MVN,R1,NONE,0xFF000000);
C(MI);I2C(MOV,R1,NONE,0x00000000);
I2C(TST,NONE,R2,0xFF000000);
C(NE);I2C(MVN,R2,NONE,0xFF000000);
C(MI);I2C(MOV,R2,NONE,0x00000000);
I2C(TST,NONE,R3,0xFF000000);
C(NE);I2C(MVN,R3,NONE,0xFF000000);
C(MI);I2C(MOV,R3,NONE,0x00000000);
}
if (p->InvertMask && p->Pos<0)
{
p->Pos = RPos;
MB(); I1P(LDR,R0,p->InvertMask,0);
}
if (p->Pos!=RPos && p->Pos>=0) I3S(MOV,R0,NONE,R0,ROR,RPos-p->Pos);
I3S(p->Pos<0?MOV:EOR,R0,(reg)(p->Pos<0?NONE:R0),R1,LSR,SatBit-p->DstSize[0]);
I3S(MOV,R5,NONE,R2,LSR,SatBit-p->DstSize[1]);
I3S(MOV,R0,NONE,R0,ROR,BPos-RPos);
I3S(EOR,R0,R0,R5,ROR,BPos-GPos);
I3S(EOR,R0,R0,R3,LSR,SatBit-p->DstSize[2]);
p->Pos = BPos;
if (p->FX.Flags & BLITFX_DITHER)
{
MB(); I3S(MOV,R1,NONE,R1,LSL,32-SatBit+p->DstSize[0]);
MB(); I3S(MOV,R2,NONE,R2,LSL,32-SatBit+p->DstSize[1]);
MB(); I3S(MOV,R3,NONE,R3,LSL,32-SatBit+p->DstSize[2]);
}
}
void Half_RGB_UV(blit_soft* p)
{
dyninst* LoopY;
dyninst* LoopX;
int Invert = 0;
int Mask = 0;
p->DstAlignPos = p->DstAlignSize = 4;
p->DstStepX = p->DirX * ((p->DstBPP*2) >> 3);
p->PalPtr = NULL;
p->DiffMask = NULL;
p->InvertMask = NULL;
if (p->Dst.Flags & PF_INVERTED)
Invert = -1;
if (p->QAdd)
{
int Mask2;
int i,Shift;
for (i=0;i<3;++i)
Mask |= 1 << (p->DstPos[i] + p->DstSize[i] - 1);
Mask2 = Mask;
Shift = 0;
if (p->DstBPP <= 16)
{
if (p->DirX<0) Shift = p->DstBPP;
Mask2 |= Mask << p->DstBPP;
}
Invert ^= RotateRight(Mask2,Shift+p->DstPos[0]);
}
if (Invert)
p->InvertMask = InstCreate32(Invert,NONE,NONE,NONE,0,0);
if (p->OnlyDiff)
{
int Mask = 0x03030303;
if (!p->ArithStretch)
Mask &= ~0x00FF0000; //lose Y3
p->DiffMask = InstCreate32(Mask,NONE,NONE,NONE,0,0);
}
CodeBegin();
I2C(SUB,SP,SP,OFS(stack,StackFrame));
I2C(LDR,R9,R1,0); //Dst[0] RGB
I2C(LDR,R10,R2,4); //Src[1] U
I2C(LDR,R11,R2,8); //Src[2] V
I2C(LDR,R12,R2,0); //Src[0] Y
I2C(STR,R3,SP,OFS(stack,DstPitch));
I3(MOV,R8,NONE,R3); //DstPitch
I2C(LDR,R14,SP,OFS(stack,SrcPitch));
I2C(LDR,R0,SP,OFS(stack,Height));
I2C(LDR,R4,SP,OFS(stack,Width));
//SrcNext = 4*Src->Pitch - (Width << 1)
I3S(MOV,R1,NONE,R14,LSL,2);
I3S(SUB,R1,R1,R4,LSL,1);
I2C(STR,R1,SP,OFS(stack,SrcNext));
//UVNext = (Src->Pitch) - (Width << 1 >> 1);
I3(SUB,R2,R14,R4);
I2C(STR,R2,SP,OFS(stack,UVNext));
I3S(MOV,R14,NONE,R14,ASR,1);
if (p->DirX<0 && p->DstBPP==16) //adjust reversed destination for block size
I2C(SUB,R9,R9,-p->DstStepX-(p->DstBPP >> 3));
if (p->SwapXY)
{
//EndOfRect = Dst + (Height * DstBPP * DirX) >> 3;
I2C(MOV,R1,NONE,p->DstBPP * p->DirX);
I3(MUL,R0,R1,R0);
I3S(ADD,R0,R9,R0,ASR,3);
I2C(STR,R0,SP,OFS(stack,EndOfRect));
//DstNext = DstStepX - Width*DstPitch;
MB(); I3(MUL,R2,R8,R4);
I2C(MOV,R0,NONE,p->DstStepX);
I3(SUB,R0,R0,R2);
I2C(STR,R0,SP,OFS(stack,DstNext));
}
else
{
//EndOfRect = Dst + DstPitch * Height
I3(MUL,R0,R8,R0);
I3(ADD,R0,R9,R0);
I2C(STR,R0,SP,OFS(stack,EndOfRect));
//DstNext = DstPitch*2 - DirX * Width << DstBPP2;
I3S(MOV,R2,NONE,R8,LSL,1);
I3S(p->DirX>0?SUB:ADD,R2,R2,R4,LSL,p->DstBPP2);
I2C(STR,R2,SP,OFS(stack,DstNext));
}
if (p->FX.Flags & BLITFX_DITHER)
{
I2C(MVN,R1,NONE,0x80000000);
I2C(MVN,R2,NONE,0x80000000);
I2C(MVN,R3,NONE,0x80000000);
}
if (!p->SwapXY) // starting in second row
{
I3(ADD,R10,R10,R14);
I3(ADD,R11,R11,R14);
I3S(ADD,R12,R12,R14,LSL,2);
}
// R8 DstPitch
// R4 Width
LoopY = Label(1);
if (p->SwapXY)
{
I3(MUL,R4,R8,R4); //R8=dstpitch
I3(ADD,R7,R9,R4);
}
else
{
if (p->DirX > 0)
I3S(ADD,R7,R9,R4,LSL,p->DstBPP2);
else
I3S(SUB,R7,R9,R4,LSL,p->DstBPP2);
}
if (p->OnlyDiff)
{
if (p->FX.Flags & BLITFX_DITHER)
I2C(STR,R7,SP,OFS(stack,EndOfLine)); //needed for restoring
MB(); I1P(LDR,R5,p->DiffMask,0);
MB(); I2C(LDR,R6,SP,OFS(stack,Src2SrcLast));
p->Skip = Label(0);
}
LoopX = Label(1);
{
if (p->OnlyDiff)
{
// R0 temp
// R1..R3 R,G,B accumulator (if dither)
// R4 temp
// R5 DiffMask
// R6 Src2SrcLast
// R7 EndOfLine
// R8 DstPitch
// R9 Dst
// R10 U (second row when not SwapXY)
// R11 V (second row when not SwapXY)
// R12 Y (second double row when not SwapXY)
// R14 UVPitch (same as YPitch/2)
int LoadSub = p->SwapXY?LDR_POST:LDR_POSTSUB;
int LoadAdd = p->SwapXY?LDR_POSTSUB:LDR_POST;
reg RA=R0,RB=R4,RC,RD;
if (p->FX.Flags & BLITFX_DITHER)
{
RC=R7; //will be restored
RD=R8; //will be restored
}
else
{
RC=R1;
RD=R2;
}
I3(LDR,RA,R12,R6);
I3S(LoadSub,RB,R12,R14,LSL,2);
I3(EOR,RA,RA,RB);
if (p->ArithStretch)
{
MB(); I3(LDR,RC,R12,R6);
MB(); I3S(LDR_POST,RD,R12,R14,LSL,1);
I3(EOR,RC,RC,RD);
I3(ORR,RA,RA,RC);
MB(); I3(LDR,RB,R12,R6);
MB(); I3S(LoadAdd,RD,R12,R14,LSL,2);
I3(EOR,RB,RB,RD);
I3(ORR,RA,RA,RB);
MB(); I3(LDR,RC,R12,R6);
MB(); I3S(LDR_POSTSUB,RD,R12,R14,LSL,1);
I3(EOR,RC,RC,RD);
I3(ORR,RA,RA,RC);
I3S(BIC,RA,RA,R5,LSL,1); //lose 1 bit from Y (additionaly to DiffMask)
}
else
{
MB(); I3(LDR,RC,R12,R6);
MB(); I3S(LoadAdd,RD,R12,R14,LSL,2);
I3(EOR,RC,RC,RD);
I3(ORR,RA,RA,RC);
I2C(BIC,RA,RA,0xFF00); //lose Y1 (Y3 is masked out in DiffMask already)
}
MB(); Half(); I3(LDR,RB,R10,R6);
MB(); Half(); I3(LoadSub,RD,R10,R14);
I3(EOR,RB,RB,RD);
I3(ORR,RA,RA,RB);
MB(); Half(); I3(LDR,RC,R10,R6);
MB(); Half(); I3(LoadAdd,RD,R10,R14);
I3(EOR,RC,RC,RD);
I3(ORR,RA,RA,RC);
MB(); Half(); I3(LDR,RB,R11,R6);
MB(); Half(); I3(LoadSub,RD,R11,R14);
I3(EOR,RB,RB,RD);
I3(ORR,RA,RA,RB);
MB(); Half(); I3(LDR,RC,R11,R6);
MB(); Half(); I3(LoadAdd,RD,R11,R14);
I3(EOR,RC,RC,RD);
I3(ORR,RA,RA,RC);
S(); I3(BIC,RA,RA,R5);
if (p->FX.Flags & BLITFX_DITHER) // restore R7,R8
{
MB(); I2C(LDR,R8,SP,OFS(stack,DstPitch));
MB(); I2C(LDR,R7,SP,OFS(stack,EndOfLine));
}
if (p->SwapXY)
{
C(EQ); I3S(ADD,R9,R9,R8,LSL,1);
}
else
{
C(EQ); I2C(ADD,R9,R9,p->DstStepX);
}
I0P(B,EQ,p->Skip);
}
p->Pos = -1;
Half_RGB_UV_Pixel(p,0);
Half_RGB_UV_Pixel(p,1);
if (p->Pos)
I3S(MOV,R0,NONE,R0,ROR,-p->Pos);
if (p->DstBPP==8) Half();
if (p->SwapXY)
I3(STR_POST,R0,R9,R8);
else
I3(STR,R0,R9,R8);
p->Pos = -1;
Half_RGB_UV_Pixel(p,2);
Half_RGB_UV_Pixel(p,3);
if (p->Pos)
I3S(MOV,R0,NONE,R0,ROR,-p->Pos);
if (p->DstBPP==8) Half();
if (p->SwapXY)
I3(STR_POST,R0,R9,R8);
else
I2C(STR_POST,R0,R9,p->DstStepX);
if (p->OnlyDiff)
{
MB(); I1P(LDR,R5,p->DiffMask,0);
MB(); I2C(LDR,R6,SP,OFS(stack,Src2SrcLast));
InstPost(p->Skip);
}
I3(CMP,NONE,R9,R7);
I2C(ADD,R12,R12,4);
I2C(ADD,R10,R10,2);
I2C(ADD,R11,R11,2);
I0P(B,NE,LoopX);
}
I2C(LDR,R0,SP,OFS(stack,SrcNext));
I2C(LDR,R4,SP,OFS(stack,DstNext));
I2C(LDR,R6,SP,OFS(stack,UVNext));
I2C(LDR,R5,SP,OFS(stack,EndOfRect));
//increment pointers
I3(ADD,R12,R12,R0);
I3(ADD,R9,R9,R4);
I3(ADD,R10,R10,R6);
I3(ADD,R11,R11,R6);
//prepare registers for next row
I2C(LDR,R4,SP,OFS(stack,Width));
I3(CMP,NONE,R9,R5);
I0P(B,NE,LoopY);
I2C(ADD,SP,SP,OFS(stack,StackFrame));
CodeEnd();
if (p->InvertMask) InstPost(p->InvertMask);
if (p->DiffMask) InstPost(p->DiffMask);
if (p->PalPtr) InstPost(p->PalPtr);
}
#endif
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