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CX51 using EMOV instruction on non- MX cored device

I'm currently running a SiLabs C8051F336 processor using the CX51 compiler. I'm getting and illegal op-code (A5-the EMOV instruction) when I compile the following line:

*string = map_char_to_index(*string, font);

this get compiled as

        ; SOURCE LINE # 77
001E AD00        R     MOV     R5,font
0020 120000      R     LCALL   _map_char_to_index
0023 AB00        R     MOV     R3,string
0025 AA00        R     MOV     R2,string+01H
0027 A900        R     MOV     R1,string+02H
0029 EF                MOV     A,R7
002A A558              EMOV    @PR0,A


Any ideas as to why that instruction is implemented on a non MX core, and non Phillips device? How do I disable it?

Parents
  • SiLabs process for loading code into the UC.

    Compile & link

    Connect to Device

    Download -- at this point a status dialog appears there are several steps in this process.
    1) processing OMF file...
    2) writing flash blocks...
    3) verifying flash blocks...
    4) updating system information...

    disconnect and run like the wind... ideally

Reply
  • SiLabs process for loading code into the UC.

    Compile & link

    Connect to Device

    Download -- at this point a status dialog appears there are several steps in this process.
    1) processing OMF file...
    2) writing flash blocks...
    3) verifying flash blocks...
    4) updating system information...

    disconnect and run like the wind... ideally

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