shader_bytecode: Add decoding for FMNMX instruction.

src/video_core/engines/shader_bytecode.h

@@ -310,6 +310,7 @@ public:
         SHR_C,
         SHR_R,
         SHR_IMM,
+        FMNMX,
         FSETP_C, // Set Predicate
         FSETP_R,
         FSETP_IMM,
@@ -460,6 +461,7 @@ private:
             INST("0100110000101---", Id::SHR_C, Type::Arithmetic, "SHR_C"),
             INST("0101110000101---", Id::SHR_R, Type::Arithmetic, "SHR_R"),
             INST("0011100-00101---", Id::SHR_IMM, Type::Arithmetic, "SHR_IMM"),
+            INST("0101110001100---", Id::FMNMX, Type::Arithmetic, "FMNMX"),
             INST("0100110011100---", Id::I2I_C, Type::Conversion, "I2I_C"),
             INST("0101110011100---", Id::I2I_R, Type::Conversion, "I2I_R"),
             INST("01110001-1000---", Id::I2I_IMM, Type::Conversion, "I2I_IMM"),