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Shader Recomnpiler: implement textuzreGrad 3D emulation constant propagation

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This commit is contained in:
Fernando Sahmkow 2023-08-18 18:30:31 +02:00 • committed by Liam
parent ae1421265a
commit c03f0b3c89
8 changed files with 261 additions and 11 deletions
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23
src/shader_recompiler/backend/glasm/emit_glasm_image.cpp
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@ -558,12 +558,15 @@ void EmitImageGradient(EmitContext& ctx, IR::Inst& inst, const IR::Value& index,
const IR::Value& coord, const IR::Value& derivatives,
const IR::Value& offset, const IR::Value& lod_clamp) {
const auto info{inst.Flags<IR::TextureInstInfo>()};
ScopedRegister dpdx, dpdy;
ScopedRegister dpdx, dpdy, coords;
const bool multi_component{info.num_derivates > 1 || info.has_lod_clamp};
if (multi_component) {
// Allocate this early to avoid aliasing other registers
dpdx = ScopedRegister{ctx.reg_alloc};
dpdy = ScopedRegister{ctx.reg_alloc};
if (info.num_derivates >= 3) {
coords = ScopedRegister{ctx.reg_alloc};
}
}
const auto sparse_inst{PrepareSparse(inst)};
const std::string_view sparse_mod{sparse_inst ? ".SPARSE" : ""};
@ -580,15 +583,27 @@ void EmitImageGradient(EmitContext& ctx, IR::Inst& inst, const IR::Value& index,
"MOV.F {}.y,{}.w;",
dpdx.reg, derivatives_vec, dpdx.reg, derivatives_vec, dpdy.reg, derivatives_vec,
dpdy.reg, derivatives_vec);
Register final_coord;
if (info.num_derivates >= 3) {
ctx.Add("MOV.F {}.z,{}.x;"
"MOV.F {}.z,{}.y;",
dpdx.reg, coord_vec, dpdy.reg, coord_vec);
ctx.Add("MOV.F {}.x,0;"
"MOV.F {}.y,0;",
"MOV.F {}.z,0;", coords.reg, coords.reg, coords.reg);
final_coord = coords.reg;
} else {
final_coord = coord_vec;
}
if (info.has_lod_clamp) {
const ScalarF32 lod_clamp_value{ctx.reg_alloc.Consume(lod_clamp)};
ctx.Add("MOV.F {}.w,{};"
"TXD.F.LODCLAMP{} {},{},{},{},{},{}{};",
dpdy.reg, lod_clamp_value, sparse_mod, ret, coord_vec, dpdx.reg, dpdy.reg,
dpdy.reg, lod_clamp_value, sparse_mod, ret, final_coord, dpdx.reg, dpdy.reg,
texture, type, offset_vec);
} else {
ctx.Add("TXD.F{} {},{},{},{},{},{}{};", sparse_mod, ret, coord_vec, dpdx.reg, dpdy.reg,
texture, type, offset_vec);
ctx.Add("TXD.F{} {},{},{},{},{},{}{};", sparse_mod, ret, final_coord, dpdx.reg,
dpdy.reg, texture, type, offset_vec);
}
} else {
ctx.Add("TXD.F{} {},{},{}.x,{}.y,{},{}{};", sparse_mod, ret, coord_vec, derivatives_vec,