Isaac Marino Bavaresco ha scritto:
>>> Look how they do 'Var = 0;' :
>>>
>>> bcf STATUS,C
>>> *movlw* 0
>>> btfsc STATUS,C
>>> *movlw* 1
>>> movwf Var
>>>
>> Evaluate the right hand expression and put the result in something just big
>> enough (in this case the carry flag). Copy the result to the lvalue.
Hmmm, just a guess from my (limited) experience in writing compilers.
bcf STATUS,C -> this is a generic "=0" for a bit-type operand
movlw 0
btfsc STATUS,C
movlw 1
movwf Var
-> this is a generic "assign 1 or 0 to a 8bit variable.
Unless optimized further, the "1st step" of the C compiler will generate
this.
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