My 2c is that they wanted to provide us one more option:

 w = w - K  ==>    addlw   -K

 w = k - w  ==>    sublw    K     // also  w = -w ==>  sublw  0

Otherwise, sublw would be practically redundant.

Does this makes sense ?

Tal

> -----Original Message-----
> From: pic microcontroller discussion list
> [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Thomas C. Sefranek
> Sent: Wednesday, May 15, 2002 3:43 PM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: [PIC]: SUBLW
>
>
> Burned!!!
>
> SUBLW does NOT SUBtract Literal from W!
> (It subtracts W from Literal)
>
> WHY did they reverse the order of the operands in the Mnemonic?
>
>
>   *
>   |  __O    Thomas C. Sefranek  tcs@cmcorp.com
>   |_-\<,_   Amateur Radio Operator: WA1RHP
>   (*)/ (*)  Bicycle mobile on 145.41, 448.625 MHz
>
> ARRL Instructor, Technical Specialist, VE Contact.
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