GPU: Corrected the I2F_R implementation.

src/video_core/renderer_opengl/gl_shader_decompiler.cpp

@@ -849,8 +849,7 @@ private:
             ASSERT_MSG(!instr.conversion.saturate_a, "Unimplemented");
 
             switch (opcode->GetId()) {
-            case OpCode::Id::I2I_R:
-            case OpCode::Id::I2F_R: {
+            case OpCode::Id::I2I_R: {
                 ASSERT_MSG(!instr.conversion.selector, "Unimplemented");
 
                 std::string op_a =
@@ -863,6 +862,17 @@ private:
                 regs.SetRegisterToInteger(instr.gpr0, instr.conversion.is_signed, 0, op_a, 1, 1);
                 break;
             }
+            case OpCode::Id::I2F_R: {
+                std::string op_a =
+                    regs.GetRegisterAsInteger(instr.gpr20, 0, instr.conversion.is_signed);
+
+                if (instr.conversion.abs_a) {
+                    op_a = "abs(" + op_a + ')';
+                }
+
+                regs.SetRegisterToFloat(instr.gpr0, 0, op_a, 1, 1);
+                break;
+            }
             case OpCode::Id::F2F_R: {
                 std::string op_a = regs.GetRegisterAsFloat(instr.gpr20);