From 864cbbaf4cec524815d05e2053a460c944e6c719 Mon Sep 17 00:00:00 2001 From: ReinUsesLisp Date: Wed, 21 Nov 2018 02:11:47 -0300 Subject: gl_shader_decompiler: Fix register overwriting on texture calls --- .../renderer_opengl/gl_shader_decompiler.cpp | 138 ++++++++++++--------- 1 file changed, 78 insertions(+), 60 deletions(-) diff --git a/src/video_core/renderer_opengl/gl_shader_decompiler.cpp b/src/video_core/renderer_opengl/gl_shader_decompiler.cpp index 90a88b91a..f4fa6c74a 100644 --- a/src/video_core/renderer_opengl/gl_shader_decompiler.cpp +++ b/src/video_core/renderer_opengl/gl_shader_decompiler.cpp @@ -1243,14 +1243,7 @@ private: regs.SetRegisterToInteger(dest, true, 0, result, 1, 1); } - void WriteTexsInstruction(const Instruction& instr, const std::string& coord, - const std::string& texture) { - // Add an extra scope and declare the texture coords inside to prevent - // overwriting them in case they are used as outputs of the texs instruction. - shader.AddLine('{'); - ++shader.scope; - shader.AddLine(coord); - + void WriteTexsInstruction(const Instruction& instr, const std::string& texture) { // TEXS has two destination registers and a swizzle. The first two elements in the swizzle // go into gpr0+0 and gpr0+1, and the rest goes into gpr28+0 and gpr28+1 @@ -1273,9 +1266,6 @@ private: ++written_components; } - - --shader.scope; - shader.AddLine('}'); } static u32 TextureCoordinates(Tegra::Shader::TextureType texture_type) { @@ -2563,7 +2553,6 @@ private: } // TODO: make sure coordinates are always indexed to gpr8 and gpr20 is always bias // or lod. - std::string op_c; const std::string sampler = GetSampler(instr.sampler, texture_type, is_array, depth_compare); @@ -2586,27 +2575,35 @@ private: } case Tegra::Shader::TextureProcessMode::LB: case Tegra::Shader::TextureProcessMode::LBA: { - if (depth_compare) { - if (is_array) - op_c = regs.GetRegisterAsFloat(instr.gpr20.Value() + 2); - else - op_c = regs.GetRegisterAsFloat(instr.gpr20.Value() + 1); - } else { - op_c = regs.GetRegisterAsFloat(instr.gpr20); - } + const std::string bias = [&]() { + if (depth_compare) { + if (is_array) + return regs.GetRegisterAsFloat(instr.gpr20.Value() + 2); + else + return regs.GetRegisterAsFloat(instr.gpr20.Value() + 1); + } else { + return regs.GetRegisterAsFloat(instr.gpr20); + } + }(); + shader.AddLine("float bias = " + bias + ';'); + // TODO: Figure if A suffix changes the equation at all. - texture = "texture(" + sampler + ", coords, " + op_c + ')'; + texture = "texture(" + sampler + ", coords, bias)"; break; } case Tegra::Shader::TextureProcessMode::LL: case Tegra::Shader::TextureProcessMode::LLA: { - if (num_coordinates <= 2) { - op_c = regs.GetRegisterAsFloat(instr.gpr20); - } else { - op_c = regs.GetRegisterAsFloat(instr.gpr20.Value() + 1); - } + const std::string lod = [&]() { + if (num_coordinates <= 2) { + return regs.GetRegisterAsFloat(instr.gpr20); + } else { + return regs.GetRegisterAsFloat(instr.gpr20.Value() + 1); + } + }(); + shader.AddLine("float lod = " + lod + ';'); + // TODO: Figure if A suffix changes the equation at all. - texture = "textureLod(" + sampler + ", coords, " + op_c + ')'; + texture = "textureLod(" + sampler + ", coords, lod)"; break; } default: { @@ -2633,7 +2630,6 @@ private: break; } case OpCode::Id::TEXS: { - std::string coord; Tegra::Shader::TextureType texture_type{instr.texs.GetTextureType()}; bool is_array{instr.texs.IsArrayTexture()}; @@ -2646,17 +2642,21 @@ private: if (depth_compare) num_coordinates += 1; + // Scope to avoid variable name overlaps. + shader.AddLine('{'); + ++shader.scope; + switch (num_coordinates) { case 2: { if (is_array) { const std::string index = regs.GetRegisterAsInteger(instr.gpr8); const std::string x = regs.GetRegisterAsFloat(instr.gpr8.Value() + 1); const std::string y = regs.GetRegisterAsFloat(instr.gpr20); - coord = "vec3 coords = vec3(" + x + ", " + y + ", " + index + ");"; + shader.AddLine("vec3 coords = vec3(" + x + ", " + y + ", " + index + ");"); } else { const std::string x = regs.GetRegisterAsFloat(instr.gpr8); const std::string y = regs.GetRegisterAsFloat(instr.gpr20); - coord = "vec2 coords = vec2(" + x + ", " + y + ");"; + shader.AddLine("vec2 coords = vec2(" + x + ", " + y + ");"); } break; } @@ -2666,13 +2666,13 @@ private: const std::string x = regs.GetRegisterAsFloat(instr.gpr8.Value() + 1); const std::string y = regs.GetRegisterAsFloat(instr.gpr8.Value() + 2); const std::string z = regs.GetRegisterAsFloat(instr.gpr20); - coord = - "vec4 coords = vec4(" + x + ", " + y + ", " + z + ", " + index + ");"; + shader.AddLine("vec4 coords = vec4(" + x + ", " + y + ", " + z + ", " + + index + ");"); } else { const std::string x = regs.GetRegisterAsFloat(instr.gpr8); const std::string y = regs.GetRegisterAsFloat(instr.gpr8.Value() + 1); const std::string z = regs.GetRegisterAsFloat(instr.gpr20); - coord = "vec3 coords = vec3(" + x + ", " + y + ", " + z + ");"; + shader.AddLine("vec3 coords = vec3(" + x + ", " + y + ", " + z + ");"); } break; } @@ -2683,7 +2683,7 @@ private: // Fallback to interpreting as a 2D texture for now const std::string x = regs.GetRegisterAsFloat(instr.gpr8); const std::string y = regs.GetRegisterAsFloat(instr.gpr20); - coord = "vec2 coords = vec2(" + x + ", " + y + ");"; + shader.AddLine("vec2 coords = vec2(" + x + ", " + y + ");"); texture_type = Tegra::Shader::TextureType::Texture2D; is_array = false; } @@ -2715,14 +2715,16 @@ private: } } if (!depth_compare) { - WriteTexsInstruction(instr, coord, texture); + WriteTexsInstruction(instr, texture); } else { - WriteTexsInstruction(instr, coord, "vec4(" + texture + ')'); + WriteTexsInstruction(instr, "vec4(" + texture + ')'); } + + shader.AddLine('}'); + --shader.scope; break; } case OpCode::Id::TLDS: { - std::string coord; const Tegra::Shader::TextureType texture_type{instr.tlds.GetTextureType()}; const bool is_array{instr.tlds.IsArrayTexture()}; @@ -2736,12 +2738,16 @@ private: UNIMPLEMENTED_IF_MSG(instr.tlds.UsesMiscMode(Tegra::Shader::TextureMiscMode::MZ), "MZ is not implemented"); - u32 op_c_offset = 0; + u32 extra_op_offset = 0; + + // Scope to avoid variable name overlaps. + shader.AddLine('{'); + ++shader.scope; switch (texture_type) { case Tegra::Shader::TextureType::Texture1D: { const std::string x = regs.GetRegisterAsInteger(instr.gpr8); - coord = "int coords = " + x + ';'; + shader.AddLine("int coords = " + x + ';'); break; } case Tegra::Shader::TextureType::Texture2D: { @@ -2749,8 +2755,8 @@ private: const std::string x = regs.GetRegisterAsInteger(instr.gpr8); const std::string y = regs.GetRegisterAsInteger(instr.gpr20); - coord = "ivec2 coords = ivec2(" + x + ", " + y + ");"; - op_c_offset = 1; + shader.AddLine("ivec2 coords = ivec2(" + x + ", " + y + ");"); + extra_op_offset = 1; break; } default: @@ -2765,9 +2771,10 @@ private: break; } case Tegra::Shader::TextureProcessMode::LL: { - const std::string op_c = - regs.GetRegisterAsInteger(instr.gpr20.Value() + op_c_offset); - texture = "texelFetch(" + sampler + ", coords, " + op_c + ')'; + shader.AddLine( + "float lod = " + + regs.GetRegisterAsInteger(instr.gpr20.Value() + extra_op_offset) + ';'); + texture = "texelFetch(" + sampler + ", coords, lod)"; break; } default: { @@ -2776,7 +2783,10 @@ private: static_cast(instr.tlds.GetTextureProcessMode())); } } - WriteTexsInstruction(instr, coord, texture); + WriteTexsInstruction(instr, texture); + + --shader.scope; + shader.AddLine('}'); break; } case OpCode::Id::TLD4: { @@ -2799,18 +2809,23 @@ private: if (depth_compare) num_coordinates += 1; + // Add an extra scope and declare the texture coords inside to prevent + // overwriting them in case they are used as outputs of the texs instruction. + shader.AddLine('{'); + ++shader.scope; + switch (num_coordinates) { case 2: { const std::string x = regs.GetRegisterAsFloat(instr.gpr8); const std::string y = regs.GetRegisterAsFloat(instr.gpr8.Value() + 1); - coord = "vec2 coords = vec2(" + x + ", " + y + ");"; + shader.AddLine("vec2 coords = vec2(" + x + ", " + y + ");"); break; } case 3: { const std::string x = regs.GetRegisterAsFloat(instr.gpr8); const std::string y = regs.GetRegisterAsFloat(instr.gpr8.Value() + 1); const std::string z = regs.GetRegisterAsFloat(instr.gpr8.Value() + 2); - coord = "vec3 coords = vec3(" + x + ", " + y + ", " + z + ");"; + shader.AddLine("vec3 coords = vec3(" + x + ", " + y + ", " + z + ");"); break; } default: @@ -2818,17 +2833,13 @@ private: static_cast(num_coordinates)); const std::string x = regs.GetRegisterAsFloat(instr.gpr8); const std::string y = regs.GetRegisterAsFloat(instr.gpr8.Value() + 1); - coord = "vec2 coords = vec2(" + x + ", " + y + ");"; + shader.AddLine("vec2 coords = vec2(" + x + ", " + y + ");"); texture_type = Tegra::Shader::TextureType::Texture2D; } const std::string sampler = GetSampler(instr.sampler, texture_type, false, depth_compare); - // Add an extra scope and declare the texture coords inside to prevent - // overwriting them in case they are used as outputs of the texs instruction. - shader.AddLine("{"); - ++shader.scope; - shader.AddLine(coord); + const std::string texture = "textureGather(" + sampler + ", coords, " + std::to_string(instr.tld4.component) + ')'; if (!depth_compare) { @@ -2845,7 +2856,7 @@ private: regs.SetRegisterToFloat(instr.gpr0, 0, texture, 1, 1, false); } --shader.scope; - shader.AddLine("}"); + shader.AddLine('}'); break; } case OpCode::Id::TLD4S: { @@ -2856,6 +2867,10 @@ private: instr.tld4s.UsesMiscMode(Tegra::Shader::TextureMiscMode::AOFFI), "AOFFI is not implemented"); + // Scope to avoid variable name overlaps. + shader.AddLine('{'); + ++shader.scope; + const bool depth_compare = instr.tld4s.UsesMiscMode(Tegra::Shader::TextureMiscMode::DC); const std::string op_a = regs.GetRegisterAsFloat(instr.gpr8); @@ -2863,22 +2878,25 @@ private: // TODO(Subv): Figure out how the sampler type is encoded in the TLD4S instruction. const std::string sampler = GetSampler( instr.sampler, Tegra::Shader::TextureType::Texture2D, false, depth_compare); - std::string coord; if (!depth_compare) { - coord = "vec2 coords = vec2(" + op_a + ", " + op_b + ");"; + shader.AddLine("vec2 coords = vec2(" + op_a + ", " + op_b + ");"); } else { // Note: TLD4S coordinate encoding works just like TEXS's - const std::string op_c = regs.GetRegisterAsFloat(instr.gpr8.Value() + 1); - coord = "vec3 coords = vec3(" + op_a + ", " + op_c + ", " + op_b + ");"; + shader.AddLine( + "float op_y = " + regs.GetRegisterAsFloat(instr.gpr8.Value() + 1) + ';'); + shader.AddLine("vec3 coords = vec3(" + op_a + ", op_y, " + op_b + ");"); } const std::string texture = "textureGather(" + sampler + ", coords, " + std::to_string(instr.tld4s.component) + ')'; if (!depth_compare) { - WriteTexsInstruction(instr, coord, texture); + WriteTexsInstruction(instr, texture); } else { - WriteTexsInstruction(instr, coord, "vec4(" + texture + ')'); + WriteTexsInstruction(instr, "vec4(" + texture + ')'); } + + --shader.scope; + shader.AddLine('}'); break; } case OpCode::Id::TXQ: { -- cgit v1.2.3