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Vif Unpacks: After further tests on the PS2, think i have these down. 

-Corrections to V3-16, the rest was right (woohoo!)
This commit is contained in:
refractionpcsx2 2015-06-06 00:05:52 +01:00
parent ce2b87343b
commit 151fe43551
4 changed files with 25 additions and 6 deletions
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2
pcsx2/Vif_Dma.h
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@ -70,7 +70,7 @@ struct vifStruct {
int pass;
int cl;
u8 usn;
bool start_aligned;
u8 start_aligned;
u8 StructEnd; // Address of this is used to calculate end of struct
};

7
pcsx2/Vif_Unpack.cpp
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@ -232,7 +232,12 @@ _vifT void vifUnpackSetup(const u32 *data) {
vifX.tag.cmd = vifX.cmd;
GetVifX.pass = 1;
vifX.start_aligned = !!((vifX.vifpacketsize-1) & 0x1);
//Ugh things are never easy.
//Alright, in most cases with V2 and V3 we only need to know if its offset 32bits.
//However in V3-16 if the data it requires ends on a QW boundary of the source data
//the W vector becomes 0, so we need to know how far through the current QW the data begins
vifX.start_aligned = 4-((vifX.vifpacketsize-1) & 0x3);
//DevCon.Warning("Aligned %d packetsize at data start %d", vifX.start_aligned, vifX.vifpacketsize - 1);
}
template void vifUnpackSetup<0>(const u32 *data);

10
pcsx2/x86/newVif_Dynarec.cpp
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@ -161,14 +161,14 @@ void VifUnpackSSE_Dynarec::ModUnpack( int upknum, bool PostOp )
{
case 0:
case 1:
case 2: if(PostOp == true) { UnpkLoopIteration++; UnpkLoopIteration = UnpkLoopIteration & 0x3; } break;
case 2: if(PostOp == true) { UnpkLoopIteration++; UnpkLoopIteration = UnpkLoopIteration & 0x3; } break;
case 4:
case 5:
case 6: if(PostOp == true) { UnpkLoopIteration++; UnpkLoopIteration = UnpkLoopIteration & 0x1; } break;
case 8: if(PostOp == true) { UnpkLoopIteration++; UnpkLoopIteration = UnpkLoopIteration & 0x1; } break;
case 9: break;
case 8: if(PostOp == true) { UnpkLoopIteration++; UnpkLoopIteration = UnpkLoopIteration & 0x1; } break;
case 9: if (PostOp == false) { UnpkLoopIteration++; } break;
case 10: break;
case 12: break;
@ -316,6 +316,10 @@ _vifT __fi void dVifUnpack(const u8* data, bool isFill) {
v.block.wl = vifRegs.cycle.wl;
v.block.aligned = vif.start_aligned; //MTVU doesn't have a packet size!
if ((upkType & 0xf) != 9)
v.block.aligned &= 0x1;
//DevCon.Warning("Alignment %d", v.block.aligned);
// Zero out the mask parameter if it's unused -- games leave random junk
// values here which cause false recblock cache misses.
v.block.mask = doMask ? vifRegs.mask : 0;

12
pcsx2/x86/newVif_UnpackSSE.cpp
View File

@ -260,7 +260,17 @@ void VifUnpackSSE_Base::xUPK_V3_16() const {
xPUNPCK.LWD(destReg, destReg);
xShiftR (destReg, 16);
}
}
//With V3-16, it takes the first vector from the next position as the W vector
//However - IF the end of this iteration of the unpack falls on a quadword boundary, W becomes 0
//IsAligned is the position through the current QW in the vif packet
//Iteration counts where we are in the packet.
int result = (((UnpkLoopIteration/4) + 1 + (4-IsAligned)) & 0x3);
if ((UnpkLoopIteration & 0x1) == 0 && result == 0){
xAND.PS(destReg, ptr128[SSEXYZWMask[0]]); //zero last word on QW boundary if whole 32bit word is used - tested on ps2
}
}
void VifUnpackSSE_Base::xUPK_V3_8() const {