From c03f0b3c893f2bc2ae4f1e1825c5ac1453c36710 Mon Sep 17 00:00:00 2001
From: Fernando Sahmkow <fsahmkow27@gmail.com>
Date: Fri, 18 Aug 2023 18:30:31 +0200
Subject: Shader Recomnpiler: implement textuzreGrad 3D emulation constant
propagation
---
.../backend/glasm/emit_glasm_image.cpp | 23 ++++++++++++++++++----
1 file changed, 19 insertions(+), 4 deletions(-)
(limited to 'src/shader_recompiler/backend/glasm/emit_glasm_image.cpp')
diff --git a/src/shader_recompiler/backend/glasm/emit_glasm_image.cpp b/src/shader_recompiler/backend/glasm/emit_glasm_image.cpp
index 85ee273339..d0e3081249 100644
--- a/src/shader_recompiler/backend/glasm/emit_glasm_image.cpp
+++ b/src/shader_recompiler/backend/glasm/emit_glasm_image.cpp
@@ -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,
--
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