Merge pull request #1756 from ReinUsesLisp/fix-textures
gl_shader_decompiler: Fix register overwriting on texture calls
This commit is contained in:
bunnei
GitHub
commit
c4b5319446
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@ -1243,14 +1243,7 @@ private:
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regs.SetRegisterToInteger(dest, true, 0, result, 1, 1);
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}
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void WriteTexsInstruction(const Instruction& instr, const std::string& coord,
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const std::string& texture) {
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// Add an extra scope and declare the texture coords inside to prevent
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// overwriting them in case they are used as outputs of the texs instruction.
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shader.AddLine('{');
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++shader.scope;
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shader.AddLine(coord);
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void WriteTexsInstruction(const Instruction& instr, const std::string& texture) {
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// TEXS has two destination registers and a swizzle. The first two elements in the swizzle
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// go into gpr0+0 and gpr0+1, and the rest goes into gpr28+0 and gpr28+1
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@ -1273,9 +1266,6 @@ private:
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++written_components;
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}
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--shader.scope;
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shader.AddLine('}');
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}
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static u32 TextureCoordinates(Tegra::Shader::TextureType texture_type) {
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@ -2563,7 +2553,6 @@ private:
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}
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// TODO: make sure coordinates are always indexed to gpr8 and gpr20 is always bias
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// or lod.
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std::string op_c;
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const std::string sampler =
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GetSampler(instr.sampler, texture_type, is_array, depth_compare);
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@ -2586,27 +2575,35 @@ private:
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}
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case Tegra::Shader::TextureProcessMode::LB:
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case Tegra::Shader::TextureProcessMode::LBA: {
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if (depth_compare) {
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if (is_array)
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op_c = regs.GetRegisterAsFloat(instr.gpr20.Value() + 2);
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else
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op_c = regs.GetRegisterAsFloat(instr.gpr20.Value() + 1);
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} else {
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op_c = regs.GetRegisterAsFloat(instr.gpr20);
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}
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const std::string bias = [&]() {
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if (depth_compare) {
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if (is_array)
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return regs.GetRegisterAsFloat(instr.gpr20.Value() + 2);
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else
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return regs.GetRegisterAsFloat(instr.gpr20.Value() + 1);
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} else {
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return regs.GetRegisterAsFloat(instr.gpr20);
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}
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}();
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shader.AddLine("float bias = " + bias + ';');
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// TODO: Figure if A suffix changes the equation at all.
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texture = "texture(" + sampler + ", coords, " + op_c + ')';
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texture = "texture(" + sampler + ", coords, bias)";
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break;
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}
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case Tegra::Shader::TextureProcessMode::LL:
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case Tegra::Shader::TextureProcessMode::LLA: {
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if (num_coordinates <= 2) {
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op_c = regs.GetRegisterAsFloat(instr.gpr20);
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} else {
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op_c = regs.GetRegisterAsFloat(instr.gpr20.Value() + 1);
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}
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const std::string lod = [&]() {
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if (num_coordinates <= 2) {
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return regs.GetRegisterAsFloat(instr.gpr20);
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} else {
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return regs.GetRegisterAsFloat(instr.gpr20.Value() + 1);
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}
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}();
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shader.AddLine("float lod = " + lod + ';');
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// TODO: Figure if A suffix changes the equation at all.
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texture = "textureLod(" + sampler + ", coords, " + op_c + ')';
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texture = "textureLod(" + sampler + ", coords, lod)";
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break;
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}
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default: {
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@ -2633,7 +2630,6 @@ private:
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break;
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}
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case OpCode::Id::TEXS: {
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std::string coord;
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Tegra::Shader::TextureType texture_type{instr.texs.GetTextureType()};
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bool is_array{instr.texs.IsArrayTexture()};
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@ -2646,17 +2642,21 @@ private:
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if (depth_compare)
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num_coordinates += 1;
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// Scope to avoid variable name overlaps.
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shader.AddLine('{');
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++shader.scope;
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switch (num_coordinates) {
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case 2: {
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if (is_array) {
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const std::string index = regs.GetRegisterAsInteger(instr.gpr8);
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const std::string x = regs.GetRegisterAsFloat(instr.gpr8.Value() + 1);
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const std::string y = regs.GetRegisterAsFloat(instr.gpr20);
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coord = "vec3 coords = vec3(" + x + ", " + y + ", " + index + ");";
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shader.AddLine("vec3 coords = vec3(" + x + ", " + y + ", " + index + ");");
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} else {
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const std::string x = regs.GetRegisterAsFloat(instr.gpr8);
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const std::string y = regs.GetRegisterAsFloat(instr.gpr20);
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coord = "vec2 coords = vec2(" + x + ", " + y + ");";
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shader.AddLine("vec2 coords = vec2(" + x + ", " + y + ");");
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}
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break;
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}
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@ -2666,13 +2666,13 @@ private:
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const std::string x = regs.GetRegisterAsFloat(instr.gpr8.Value() + 1);
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const std::string y = regs.GetRegisterAsFloat(instr.gpr8.Value() + 2);
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const std::string z = regs.GetRegisterAsFloat(instr.gpr20);
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coord =
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"vec4 coords = vec4(" + x + ", " + y + ", " + z + ", " + index + ");";
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shader.AddLine("vec4 coords = vec4(" + x + ", " + y + ", " + z + ", " +
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index + ");");
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} else {
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const std::string x = regs.GetRegisterAsFloat(instr.gpr8);
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const std::string y = regs.GetRegisterAsFloat(instr.gpr8.Value() + 1);
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const std::string z = regs.GetRegisterAsFloat(instr.gpr20);
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coord = "vec3 coords = vec3(" + x + ", " + y + ", " + z + ");";
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shader.AddLine("vec3 coords = vec3(" + x + ", " + y + ", " + z + ");");
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}
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break;
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}
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@ -2683,7 +2683,7 @@ private:
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// Fallback to interpreting as a 2D texture for now
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const std::string x = regs.GetRegisterAsFloat(instr.gpr8);
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const std::string y = regs.GetRegisterAsFloat(instr.gpr20);
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coord = "vec2 coords = vec2(" + x + ", " + y + ");";
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shader.AddLine("vec2 coords = vec2(" + x + ", " + y + ");");
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texture_type = Tegra::Shader::TextureType::Texture2D;
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is_array = false;
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}
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@ -2715,14 +2715,16 @@ private:
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}
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}
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if (!depth_compare) {
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WriteTexsInstruction(instr, coord, texture);
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WriteTexsInstruction(instr, texture);
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} else {
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WriteTexsInstruction(instr, coord, "vec4(" + texture + ')');
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WriteTexsInstruction(instr, "vec4(" + texture + ')');
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}
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shader.AddLine('}');
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--shader.scope;
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break;
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}
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case OpCode::Id::TLDS: {
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std::string coord;
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const Tegra::Shader::TextureType texture_type{instr.tlds.GetTextureType()};
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const bool is_array{instr.tlds.IsArrayTexture()};
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@ -2736,12 +2738,16 @@ private:
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UNIMPLEMENTED_IF_MSG(instr.tlds.UsesMiscMode(Tegra::Shader::TextureMiscMode::MZ),
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"MZ is not implemented");
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u32 op_c_offset = 0;
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u32 extra_op_offset = 0;
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// Scope to avoid variable name overlaps.
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shader.AddLine('{');
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++shader.scope;
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switch (texture_type) {
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case Tegra::Shader::TextureType::Texture1D: {
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const std::string x = regs.GetRegisterAsInteger(instr.gpr8);
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coord = "int coords = " + x + ';';
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shader.AddLine("int coords = " + x + ';');
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break;
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}
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case Tegra::Shader::TextureType::Texture2D: {
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@ -2749,8 +2755,8 @@ private:
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const std::string x = regs.GetRegisterAsInteger(instr.gpr8);
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const std::string y = regs.GetRegisterAsInteger(instr.gpr20);
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coord = "ivec2 coords = ivec2(" + x + ", " + y + ");";
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op_c_offset = 1;
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shader.AddLine("ivec2 coords = ivec2(" + x + ", " + y + ");");
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extra_op_offset = 1;
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break;
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}
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default:
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@ -2765,9 +2771,10 @@ private:
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break;
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}
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case Tegra::Shader::TextureProcessMode::LL: {
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const std::string op_c =
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regs.GetRegisterAsInteger(instr.gpr20.Value() + op_c_offset);
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texture = "texelFetch(" + sampler + ", coords, " + op_c + ')';
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shader.AddLine(
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"float lod = " +
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regs.GetRegisterAsInteger(instr.gpr20.Value() + extra_op_offset) + ';');
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texture = "texelFetch(" + sampler + ", coords, lod)";
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break;
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}
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default: {
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@ -2776,7 +2783,10 @@ private:
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static_cast<u32>(instr.tlds.GetTextureProcessMode()));
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}
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}
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WriteTexsInstruction(instr, coord, texture);
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WriteTexsInstruction(instr, texture);
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--shader.scope;
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shader.AddLine('}');
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break;
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}
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case OpCode::Id::TLD4: {
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@ -2799,18 +2809,23 @@ private:
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if (depth_compare)
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num_coordinates += 1;
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// Add an extra scope and declare the texture coords inside to prevent
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// overwriting them in case they are used as outputs of the texs instruction.
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shader.AddLine('{');
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++shader.scope;
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switch (num_coordinates) {
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case 2: {
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const std::string x = regs.GetRegisterAsFloat(instr.gpr8);
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const std::string y = regs.GetRegisterAsFloat(instr.gpr8.Value() + 1);
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coord = "vec2 coords = vec2(" + x + ", " + y + ");";
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shader.AddLine("vec2 coords = vec2(" + x + ", " + y + ");");
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break;
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}
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case 3: {
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const std::string x = regs.GetRegisterAsFloat(instr.gpr8);
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const std::string y = regs.GetRegisterAsFloat(instr.gpr8.Value() + 1);
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const std::string z = regs.GetRegisterAsFloat(instr.gpr8.Value() + 2);
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coord = "vec3 coords = vec3(" + x + ", " + y + ", " + z + ");";
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shader.AddLine("vec3 coords = vec3(" + x + ", " + y + ", " + z + ");");
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break;
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}
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default:
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@ -2818,17 +2833,13 @@ private:
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static_cast<u32>(num_coordinates));
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const std::string x = regs.GetRegisterAsFloat(instr.gpr8);
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const std::string y = regs.GetRegisterAsFloat(instr.gpr8.Value() + 1);
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coord = "vec2 coords = vec2(" + x + ", " + y + ");";
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shader.AddLine("vec2 coords = vec2(" + x + ", " + y + ");");
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texture_type = Tegra::Shader::TextureType::Texture2D;
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}
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const std::string sampler =
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GetSampler(instr.sampler, texture_type, false, depth_compare);
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// Add an extra scope and declare the texture coords inside to prevent
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// overwriting them in case they are used as outputs of the texs instruction.
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shader.AddLine("{");
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++shader.scope;
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shader.AddLine(coord);
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const std::string texture = "textureGather(" + sampler + ", coords, " +
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std::to_string(instr.tld4.component) + ')';
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if (!depth_compare) {
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@ -2845,7 +2856,7 @@ private:
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regs.SetRegisterToFloat(instr.gpr0, 0, texture, 1, 1, false);
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}
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--shader.scope;
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shader.AddLine("}");
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shader.AddLine('}');
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break;
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}
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case OpCode::Id::TLD4S: {
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@ -2856,6 +2867,10 @@ private:
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instr.tld4s.UsesMiscMode(Tegra::Shader::TextureMiscMode::AOFFI),
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"AOFFI is not implemented");
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// Scope to avoid variable name overlaps.
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shader.AddLine('{');
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++shader.scope;
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const bool depth_compare =
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instr.tld4s.UsesMiscMode(Tegra::Shader::TextureMiscMode::DC);
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const std::string op_a = regs.GetRegisterAsFloat(instr.gpr8);
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@ -2863,22 +2878,25 @@ private:
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// TODO(Subv): Figure out how the sampler type is encoded in the TLD4S instruction.
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const std::string sampler = GetSampler(
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instr.sampler, Tegra::Shader::TextureType::Texture2D, false, depth_compare);
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std::string coord;
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if (!depth_compare) {
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coord = "vec2 coords = vec2(" + op_a + ", " + op_b + ");";
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shader.AddLine("vec2 coords = vec2(" + op_a + ", " + op_b + ");");
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} else {
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// Note: TLD4S coordinate encoding works just like TEXS's
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const std::string op_c = regs.GetRegisterAsFloat(instr.gpr8.Value() + 1);
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coord = "vec3 coords = vec3(" + op_a + ", " + op_c + ", " + op_b + ");";
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shader.AddLine(
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"float op_y = " + regs.GetRegisterAsFloat(instr.gpr8.Value() + 1) + ';');
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shader.AddLine("vec3 coords = vec3(" + op_a + ", op_y, " + op_b + ");");
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}
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const std::string texture = "textureGather(" + sampler + ", coords, " +
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std::to_string(instr.tld4s.component) + ')';
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if (!depth_compare) {
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WriteTexsInstruction(instr, coord, texture);
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WriteTexsInstruction(instr, texture);
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} else {
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WriteTexsInstruction(instr, coord, "vec4(" + texture + ')');
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WriteTexsInstruction(instr, "vec4(" + texture + ')');
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}
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--shader.scope;
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shader.AddLine('}');
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break;
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}
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case OpCode::Id::TXQ: {
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