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glasm: Implement ImageGradient

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This commit is contained in:
ReinUsesLisp 2021-05-20 01:46:47 -03:00 committed by ameerj
parent 291f220be3
commit f79cbbf814
2 changed files with 65 additions and 7 deletions
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67
src/shader_recompiler/backend/glasm/emit_glasm_image.cpp
View File

@ -127,6 +127,27 @@ void SwizzleOffsets(EmitContext& ctx, Register off_x, Register off_y, const IR::
offsets_a, off_y, offsets_a, off_y, offsets_b, off_y, offsets_b);
}
std::string GradOffset(const IR::Value& offset) {
if (offset.IsImmediate()) {
// LOG_WARNING immediate
return "";
}
IR::Inst* const vector{offset.InstRecursive()};
if (!vector->AreAllArgsImmediates()) {
// LOG_WARNING elements not immediate
return "";
}
switch (vector->NumArgs()) {
case 1:
return fmt::format(",({})", static_cast<s32>(vector->Arg(0).U32()));
case 2:
return fmt::format(",({},{})", static_cast<s32>(vector->Arg(0).U32()),
static_cast<s32>(vector->Arg(1).U32()));
default:
throw LogicError("Invalid number of gradient offsets {}", vector->NumArgs());
}
}
std::pair<std::string, ScopedRegister> Coord(EmitContext& ctx, const IR::Value& coord) {
if (coord.IsImmediate()) {
ScopedRegister scoped_reg(ctx.reg_alloc);
@ -464,11 +485,47 @@ void EmitImageQueryLod(EmitContext& ctx, IR::Inst& inst, const IR::Value& index,
ctx.Add("LOD.F {},{},{},{};", inst, coord, texture, type);
}
void EmitImageGradient([[maybe_unused]] EmitContext& ctx, [[maybe_unused]] IR::Inst& inst,
[[maybe_unused]] const IR::Value& index, [[maybe_unused]] Register coord,
[[maybe_unused]] Register derivates, [[maybe_unused]] Register offset,
[[maybe_unused]] Register lod_clamp) {
throw NotImplementedException("GLASM instruction");
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;
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};
}
const auto sparse_inst{inst.GetAssociatedPseudoOperation(IR::Opcode::GetSparseFromOp)};
const std::string_view sparse_mod{sparse_inst ? ".SPARSE" : ""};
const std::string_view type{TextureType(info)};
const std::string texture{Texture(ctx, info, index)};
const std::string offset_vec{GradOffset(offset)};
const Register coord_vec{ctx.reg_alloc.Consume(coord)};
const Register derivatives_vec{ctx.reg_alloc.Consume(derivatives)};
const Register ret{ctx.reg_alloc.Define(inst)};
if (multi_component) {
ctx.Add("MOV.F {}.x,{}.x;"
"MOV.F {}.y,{}.z;"
"MOV.F {}.x,{}.y;"
"MOV.F {}.y,{}.w;",
dpdx.reg, derivatives_vec, dpdx.reg, derivatives_vec, dpdy.reg, derivatives_vec,
dpdy.reg, derivatives_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,
texture, type, offset_vec);
} else {
ctx.Add("TXD.F{} {},{},{},{},{},{}{};", sparse_mod, ret, coord_vec, dpdx.reg, dpdy.reg,
texture, type, offset_vec);
}
} else {
ctx.Add("TXD.F{} {},{},{}.x,{}.y,{},{}{};", sparse_mod, ret, coord_vec, derivatives_vec,
derivatives_vec, texture, type, offset_vec);
}
StoreSparse(ctx, sparse_inst);
}
void EmitImageRead([[maybe_unused]] EmitContext& ctx, [[maybe_unused]] IR::Inst& inst,

5
src/shader_recompiler/backend/glasm/emit_glasm_instructions.h
View File

@ -548,8 +548,9 @@ void EmitImageFetch(EmitContext& ctx, IR::Inst& inst, const IR::Value& index,
void EmitImageQueryDimensions(EmitContext& ctx, IR::Inst& inst, const IR::Value& index,
ScalarF32 lod);
void EmitImageQueryLod(EmitContext& ctx, IR::Inst& inst, const IR::Value& index, Register coord);
void EmitImageGradient(EmitContext& ctx, IR::Inst& inst, const IR::Value& index, Register coord,
Register derivates, Register offset, Register lod_clamp);
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);
void EmitImageRead(EmitContext& ctx, IR::Inst& inst, const IR::Value& index, Register coord);
void EmitImageWrite(EmitContext& ctx, IR::Inst& inst, const IR::Value& index, Register coord,
Register color);