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rsx: Implement register lane gathering for operations other than UPX

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kd-11 2025-11-16 14:25:14 +03:00
parent 7e209a7275
commit c00eeb5b10
1 changed files with 30 additions and 2 deletions
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32
rpcs3/Emu/RSX/Program/FragmentProgramDecompiler.cpp
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@ -4,6 +4,7 @@
#include "ProgramStateCache.h"
#include <algorithm>
#include <unordered_set>
namespace rsx
{
@ -527,21 +528,48 @@ template<typename T> std::string FragmentProgramDecompiler::GetSRC(T src)
if (!src.fp16)
{
// We may need to perform gather on all the f32 lanes.
// First, confirm that we're actually reading all the lanes
// TODO: GetSRC should take a lane count argument
std::unordered_set<u8> to_gather;
// Unpack instructions always read the whole vector
if (dst.opcode == RSX_FP_OPCODE_UP16 ||
dst.opcode == RSX_FP_OPCODE_UP2 ||
dst.opcode == RSX_FP_OPCODE_UP4 ||
dst.opcode == RSX_FP_OPCODE_UPB ||
dst.opcode == RSX_FP_OPCODE_UPG)
{
auto &reg = temp_registers[src.tmp_reg_index];
if (reg.requires_gather(src.swizzle_x))
to_gather.insert(src.swizzle_x);
}
else if (!dst.no_dest)
{
// FIXME: No_DST inputs also require lane gather. A regalloc pre-pass will solve this.
// We try to guess which channels will be read. Since there is no lane count, mask input on output mask
if (dst.mask_x) to_gather.insert(src.swizzle_x);
if (dst.mask_y) to_gather.insert(src.swizzle_y);
if (dst.mask_z) to_gather.insert(src.swizzle_z);
if (dst.mask_w) to_gather.insert(src.swizzle_w);
}
auto& reg = temp_registers[src.tmp_reg_index];
bool skip_reg_assign = false;
for (const auto& ch : to_gather)
{
if (reg.requires_gather(ch))
{
properties.has_gather_op = true;
AddReg(src.tmp_reg_index, src.fp16);
ret = getFloatTypeName(4) + reg.gather_r();
skip_reg_assign = true;
break;
}
}
if (skip_reg_assign)
{
break;
}
}
else if (precision_modifier == RSX_FP_PRECISION_HALF)
{