gl_shader_decompiler: Partially implement F2F_R instruction.

src/video_core/engines/shader_bytecode.h

@@ -456,9 +456,9 @@ private:
             INST("00011110--------", Id::FMUL32_IMM, Type::Arithmetic, "FMUL32_IMM"),
             INST("0101000010000---", Id::MUFU, Type::Arithmetic, "MUFU"),
             INST("0101110010010---", Id::RRO, Type::Arithmetic, "RRO"),
-            INST("0100110010101---", Id::F2F_C, Type::Arithmetic, "F2F_C"),
-            INST("0101110010101---", Id::F2F_R, Type::Arithmetic, "F2F_R"),
-            INST("0011100-10101---", Id::F2F_IMM, Type::Arithmetic, "F2F_IMM"),
+            INST("0100110010101---", Id::F2F_C, Type::Conversion, "F2F_C"),
+            INST("0101110010101---", Id::F2F_R, Type::Conversion, "F2F_R"),
+            INST("0011100-10101---", Id::F2F_IMM, Type::Conversion, "F2F_IMM"),
             INST("0100110010110---", Id::F2I_C, Type::Arithmetic, "F2I_C"),
             INST("0101110010110---", Id::F2I_R, Type::Arithmetic, "F2I_R"),
             INST("0011100-10110---", Id::F2I_IMM, Type::Arithmetic, "F2I_IMM"),

src/video_core/renderer_opengl/gl_shader_decompiler.cpp

@@ -834,13 +834,14 @@ private:
         }
         case OpCode::Type::Conversion: {
             ASSERT_MSG(instr.conversion.size == Register::Size::Word, "Unimplemented");
-            ASSERT_MSG(!instr.conversion.selector, "Unimplemented");
             ASSERT_MSG(!instr.conversion.negate_a, "Unimplemented");
             ASSERT_MSG(!instr.conversion.saturate_a, "Unimplemented");
 
             switch (opcode->GetId()) {
             case OpCode::Id::I2I_R:
             case OpCode::Id::I2F_R: {
+                ASSERT_MSG(!instr.conversion.selector, "Unimplemented");
+
                 std::string op_a =
                     regs.GetRegisterAsInteger(instr.gpr20, 0, instr.conversion.is_signed);
 
@@ -851,6 +852,10 @@ private:
                 regs.SetRegisterToInteger(instr.gpr0, instr.conversion.is_signed, 0, op_a, 1, 1);
                 break;
             }
+            case OpCode::Id::F2F_R: {
+                regs.SetRegisterToFloat(instr.gpr0, 0, regs.GetRegisterAsFloat(instr.gpr20), 1, 1);
+                break;
+            }
             default: {
                 NGLOG_CRITICAL(HW_GPU, "Unhandled conversion instruction: {}", opcode->GetName());
                 UNREACHABLE();