From 2e0a9f66a0d41dd81bfaa7078aad9b53bedb547e Mon Sep 17 00:00:00 2001 From: Subv Date: Fri, 20 Apr 2018 09:02:28 -0500 Subject: ShaderGen: Ignore the 'sched' instruction when generating shaders. The 'sched' instruction has a very convoluted encoding, but fortunately it seems to only appear on a fixed interval (once every 4 instructions). --- src/video_core/renderer_opengl/gl_shader_decompiler.cpp | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) (limited to 'src/video_core/renderer_opengl/gl_shader_decompiler.cpp') diff --git a/src/video_core/renderer_opengl/gl_shader_decompiler.cpp b/src/video_core/renderer_opengl/gl_shader_decompiler.cpp index de137558d..c23f590cd 100644 --- a/src/video_core/renderer_opengl/gl_shader_decompiler.cpp +++ b/src/video_core/renderer_opengl/gl_shader_decompiler.cpp @@ -276,6 +276,18 @@ private: shader.AddLine(dest + " = " + src + ";"); } + /* + * Returns whether the instruction at the specified offset is a 'sched' instruction. + * Sched instructions always appear before a sequence of 3 instructions. + */ + bool IsSchedInstruction(u32 offset) const { + // sched instructions appear once every 4 instructions. + static constexpr size_t SchedPeriod = 4; + u32 absolute_offset = offset - main_offset; + + return (absolute_offset % SchedPeriod) == 0; + } + /** * Compiles a single instruction from Tegra to GLSL. * @param offset the offset of the Tegra shader instruction. @@ -283,6 +295,10 @@ private: * + 1. If the current instruction always terminates the program, returns PROGRAM_END. */ u32 CompileInstr(u32 offset) { + // Ignore sched instructions when generating code. + if (IsSchedInstruction(offset)) + return offset + 1; + const Instruction instr = {program_code[offset]}; shader.AddLine("// " + std::to_string(offset) + ": " + OpCode::GetInfo(instr.opcode).name); -- cgit v1.2.3