glasm: Implement ImageGradient
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291f220be3
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f79cbbf814
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@ -127,6 +127,27 @@ void SwizzleOffsets(EmitContext& ctx, Register off_x, Register off_y, const IR::
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offsets_a, off_y, offsets_a, off_y, offsets_b, off_y, offsets_b);
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}
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std::string GradOffset(const IR::Value& offset) {
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if (offset.IsImmediate()) {
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// LOG_WARNING immediate
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return "";
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}
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IR::Inst* const vector{offset.InstRecursive()};
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if (!vector->AreAllArgsImmediates()) {
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// LOG_WARNING elements not immediate
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return "";
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}
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switch (vector->NumArgs()) {
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case 1:
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return fmt::format(",({})", static_cast<s32>(vector->Arg(0).U32()));
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case 2:
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return fmt::format(",({},{})", static_cast<s32>(vector->Arg(0).U32()),
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static_cast<s32>(vector->Arg(1).U32()));
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default:
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throw LogicError("Invalid number of gradient offsets {}", vector->NumArgs());
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}
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}
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std::pair<std::string, ScopedRegister> Coord(EmitContext& ctx, const IR::Value& coord) {
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if (coord.IsImmediate()) {
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ScopedRegister scoped_reg(ctx.reg_alloc);
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@ -464,11 +485,47 @@ void EmitImageQueryLod(EmitContext& ctx, IR::Inst& inst, const IR::Value& index,
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ctx.Add("LOD.F {},{},{},{};", inst, coord, texture, type);
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}
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void EmitImageGradient([[maybe_unused]] EmitContext& ctx, [[maybe_unused]] IR::Inst& inst,
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[[maybe_unused]] const IR::Value& index, [[maybe_unused]] Register coord,
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[[maybe_unused]] Register derivates, [[maybe_unused]] Register offset,
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[[maybe_unused]] Register lod_clamp) {
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throw NotImplementedException("GLASM instruction");
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void EmitImageGradient(EmitContext& ctx, IR::Inst& inst, const IR::Value& index,
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const IR::Value& coord, const IR::Value& derivatives,
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const IR::Value& offset, const IR::Value& lod_clamp) {
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const auto info{inst.Flags<IR::TextureInstInfo>()};
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ScopedRegister dpdx, dpdy;
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const bool multi_component{info.num_derivates > 1 || info.has_lod_clamp};
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if (multi_component) {
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// Allocate this early to avoid aliasing other registers
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dpdx = ScopedRegister{ctx.reg_alloc};
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dpdy = ScopedRegister{ctx.reg_alloc};
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}
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const auto sparse_inst{inst.GetAssociatedPseudoOperation(IR::Opcode::GetSparseFromOp)};
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const std::string_view sparse_mod{sparse_inst ? ".SPARSE" : ""};
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const std::string_view type{TextureType(info)};
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const std::string texture{Texture(ctx, info, index)};
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const std::string offset_vec{GradOffset(offset)};
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const Register coord_vec{ctx.reg_alloc.Consume(coord)};
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const Register derivatives_vec{ctx.reg_alloc.Consume(derivatives)};
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const Register ret{ctx.reg_alloc.Define(inst)};
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if (multi_component) {
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ctx.Add("MOV.F {}.x,{}.x;"
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"MOV.F {}.y,{}.z;"
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"MOV.F {}.x,{}.y;"
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"MOV.F {}.y,{}.w;",
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dpdx.reg, derivatives_vec, dpdx.reg, derivatives_vec, dpdy.reg, derivatives_vec,
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dpdy.reg, derivatives_vec);
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if (info.has_lod_clamp) {
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const ScalarF32 lod_clamp_value{ctx.reg_alloc.Consume(lod_clamp)};
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ctx.Add("MOV.F {}.w,{};"
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"TXD.F.LODCLAMP{} {},{},{},{},{},{}{};",
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dpdy.reg, lod_clamp_value, sparse_mod, ret, coord_vec, dpdx.reg, dpdy.reg,
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texture, type, offset_vec);
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} else {
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ctx.Add("TXD.F{} {},{},{},{},{},{}{};", sparse_mod, ret, coord_vec, dpdx.reg, dpdy.reg,
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texture, type, offset_vec);
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}
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} else {
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ctx.Add("TXD.F{} {},{},{}.x,{}.y,{},{}{};", sparse_mod, ret, coord_vec, derivatives_vec,
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derivatives_vec, texture, type, offset_vec);
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}
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StoreSparse(ctx, sparse_inst);
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}
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void EmitImageRead([[maybe_unused]] EmitContext& ctx, [[maybe_unused]] IR::Inst& inst,
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@ -548,8 +548,9 @@ void EmitImageFetch(EmitContext& ctx, IR::Inst& inst, const IR::Value& index,
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void EmitImageQueryDimensions(EmitContext& ctx, IR::Inst& inst, const IR::Value& index,
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ScalarF32 lod);
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void EmitImageQueryLod(EmitContext& ctx, IR::Inst& inst, const IR::Value& index, Register coord);
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void EmitImageGradient(EmitContext& ctx, IR::Inst& inst, const IR::Value& index, Register coord,
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Register derivates, Register offset, Register lod_clamp);
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void EmitImageGradient(EmitContext& ctx, IR::Inst& inst, const IR::Value& index,
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const IR::Value& coord, const IR::Value& derivatives,
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const IR::Value& offset, const IR::Value& lod_clamp);
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void EmitImageRead(EmitContext& ctx, IR::Inst& inst, const IR::Value& index, Register coord);
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void EmitImageWrite(EmitContext& ctx, IR::Inst& inst, const IR::Value& index, Register coord,
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Register color);
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