VIF/GIF: Give 64bit back pressure when not transferring in to GIF FIFO

pcsx2/Gif.cpp

@@ -354,6 +354,9 @@ static __fi void GIFchain()
 
 	const int transferred = WRITERING_DMA((u32*)pMem, gifch.qwc);
 	gif.gscycles += transferred * BIAS;
+	
+	if (transferred > 16) // Assume we're going past the fast 16qw FIFO and in to the 2x slower 64bit FIFO.
+		g_vif1Cycles += (transferred - 16) *BIAS;
 
 	if (!gifUnit.Path3Masked() || (gif_fifo.fifoSize < 16))
 		GifDMAInt(gif.gscycles);

pcsx2/Vif_Codes.cpp

@@ -158,6 +158,7 @@ __fi int _vifCode_Direct(int pass, const u8* data, bool isDirectHL)
 
 		vif1.tag.size -= ret / 4; // Convert to u32's
 		vif1Regs.stat.VGW = false;
+		g_vif1Cycles += ((ret >> 3) * BIAS); // Add extra backpressure to the VIF (we do QW * BIAS for VIF, so double that)
 
 		if (ret & 3)
 			DevCon.Warning("Vif %s: Ret wasn't a multiple of 4!", name); // Shouldn't happen