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avremu/avr.bitops.tex
2014-09-28 16:12:53 +02:00

291 lines
7.7 KiB
TeX

\def\avr@zeroes{00000000}
\def\avr@ones{11111111}
\def\avr@bin@map#1#2#3{% BitMacro, Bitstring, Output Macro
\def\avr@bin@foreach@helper##1##2##3##4##5##6##7##8##9\@nnil{%
#1{##1}#1{##2}#1{##3}#1{##4}#1{##5}#1{##6}#1{##7}#1{##8}%
\ifx&##9&\else%
\avr@bin@foreach@helper ##9\@nnil%
\fi%
}%
\edef\@tempa{#2}%
\edef#3{\expandafter\avr@bin@foreach@helper \@tempa\@nnil}%
}
\def\avr@bin@zipmap#1#2#3#4{% Bitmacro{A}{B}, A, B, OutputMacro
\def\avr@bin@zipmap@helper##1##2##3;##4##5##6;{%
#1{##1}{##4}#1{##2}{##5}%
\ifx&##3&%
\ifx&##6&\else\avr@error{Wrong Arguments to ZipMap}\fi%
\else%
\avr@bin@zipmap@helper ##3;##6;%
\fi%
}%
\edef\@tempa{#2;#3;}%
\edef#4{\expandafter\avr@bin@zipmap@helper\@tempa}%
}
\csdef{avr@bit@negate@0}{1}
\csdef{avr@bit@negate@1}{0}
\def\avr@bit@negate#1{\csuse{avr@bit@negate@#1}}
% \avr@bin@negate{A}{\result} -> \result = ~A
\def\avr@bin@negate{\avr@bin@map{\avr@bit@negate}}
\def\avr@bit@id#1{#1}
% \avr@bin@id{A}{\result} -> \result = A
\def\avr@bin@id{\avr@bin@map{\avr@bit@id}}
\csdef{avr@bit@mask@00}{.}
\csdef{avr@bit@mask@01}{0}
\csdef{avr@bit@mask@10}{.}
\csdef{avr@bit@mask@11}{1}
\def\avr@bit@mask#1#2{\csuse{avr@bit@mask@#1#2}}
% \avr@bin@mask{value}{mask}{\result} -> \result = ...
\def\avr@bin@mask{\avr@bin@zipmap{\avr@bit@mask}}
\csdef{avr@bit@and@00}{0}
\csdef{avr@bit@and@01}{0}
\csdef{avr@bit@and@10}{0}
\csdef{avr@bit@and@11}{1}
\def\avr@bit@and#1#2{\csuse{avr@bit@and@#1#2}}
% \avr@bin@and{A}{B}{\result} -> \result = A & B
\def\avr@bin@and{\avr@bin@zipmap{\avr@bit@and}}
\csdef{avr@bit@or@00}{0}
\csdef{avr@bit@or@01}{1}
\csdef{avr@bit@or@10}{1}
\csdef{avr@bit@or@11}{1}
\def\avr@bit@or#1#2{\csuse{avr@bit@or@#1#2}}
% \avr@bin@or{A}{B}{\result} -> \result = A | B
\def\avr@bin@or{\avr@bin@zipmap{\avr@bit@or}}
\csdef{avr@bit@xor@00}{0}
\csdef{avr@bit@xor@01}{1}
\csdef{avr@bit@xor@10}{1}
\csdef{avr@bit@xor@11}{0}
\def\avr@bit@xor#1#2{\csuse{avr@bit@xor@#1#2}}
% \avr@bin@xor{A}{B}{\result} -> \result = A | B
\def\avr@bin@xor{\avr@bin@zipmap{\avr@bit@xor}}
% \avr@bin@getbit bs:byte, bitnum, \result -> \result = (bs >> bitnum)& 1
\def\avr@bin@getbit#1#2#3{%
\avr@count@tmpa=7%
\advance\avr@count@tmpa by -#2\relax%
\def\avr@bin@getbit@helper##1##2\@nnil{%
\ifnum \avr@count@tmpa = 0%
\def#3{##1}%
\else%
\advance\avr@count@tmpa by -1\relax%
\avr@bin@getbit@helper##2\@nnil%
\fi%
}%
\edef\@tmpa{#1}%
\expandafter\avr@bin@getbit@helper\@tmpa\@nnil%
}
\def\avr@bin@setbit#1#2#3#4{%
\def\@tempa{}%
\avr@count@tmpa=7%
\advance\avr@count@tmpa by -#2\relax%
\def\avr@bin@setbit@helper##1##2\@nnil{%
\ifnum \avr@count@tmpa = 0%
\xdef\@tempa{\@tempa #3##2}%
\else%
\advance\avr@count@tmpa by -1\relax%
\xdef\@tempa{\@tempa ##1}%
\avr@bin@setbit@helper##2\@nnil%
\fi%
}%
\edef\@tmpb{#1}%
\expandafter\avr@bin@setbit@helper\@tmpb\@nnil%
\edef#4{\@tempa}
}
% \avr@bin@btw bs:byte, \result -> \result = 00000000+bs
\def\avr@bin@btw#1#2{\xdef#2{00000000#1}}
\def\avr@bin@btw@sign#1#2{%
\avr@bin@getbit{#1}{7}{\@tmpa}%
\xdef#2{\@tmpa\@tmpa\@tmpa\@tmpa\@tmpa\@tmpa\@tmpa\@tmpa#1}%
}
\def\avr@bin@word@low#1#2{%
\edef\@tempa{#1}%
\edef#2{\expandafter\avr@bin@word@low@helper\@tempa\@nnil}%
}
\def\avr@bin@word@low@helper#1#2#3#4#5#6#7#8#9\@nnil{#9}
\def\avr@bin@word@high#1#2{%
\edef\@tempa{#1}%
\edef#2{\expandafter\avr@bin@word@high@helper\@tempa\@nnil}%
}
\def\avr@bin@word@high@helper#1#2#3#4#5#6#7#8#9\@nnil{%
#1#2#3#4#5#6#7#8%
}
% \avr@bin@wtb bs:word, \result = ((uint8_t) bs)
\def\avr@bin@wtb{\avr@bin@word@low}
% \avr@bin@shiftleft bs:(byte|word), count, \result, \carry
% -> \result = bs << count; \carry = (bs >> count) & 1
\def\avr@bin@shiftleft#1#2#3#4{%
\avr@count@tmpa=#2\relax%
\edef#4{0}%
\def\avr@bin@shiftleft@helper##1##2\@nnil{%
\ifnum \avr@count@tmpa = 0%
\edef#3{##1##2}%
\else%
\edef#4{##1}%
\advance \avr@count@tmpa by -1\relax%
\avr@bin@shiftleft@helper ##20\@nnil%
\fi%
}%
\edef\@tempa{#1}%
\expandafter\avr@bin@shiftleft@helper\@tempa\@nnil%
}
\def\avr@bin@shiftleft@barrel#1#2#3#4{%
\avr@count@tmpa=#2\relax%
\edef#4{0}%
\def\avr@bin@shiftleft@helper##1##2\@nnil{%
\ifnum \avr@count@tmpa = 0%
\edef#3{##1##2}%
\else%
\edef#4{##1}%
\advance \avr@count@tmpa by -1\relax%
\avr@bin@shiftleft@helper ##2##1\@nnil%
\fi%
}%
\edef\@tempa{#1}%
\expandafter\avr@bin@shiftleft@helper\@tempa\@nnil%
}
% Delete LSB: bs, \result, \carry
\def\avr@bin@lsb@del#1#2#3{%
\def\avr@bin@lsb@del@helper##1##2\@nnil{%
\ifx&##2&%
\edef#3{##1}%
\else%
\xdef#2{#2##1}% Append bit to result
\avr@bin@lsb@del@helper ##2\@nnil%
\fi%
}%
\edef\@tempa{#1}%
\def#2{}%
\expandafter\avr@bin@lsb@del@helper\@tempa\@nnil
}
% Get LSB: bs, \result
\def\avr@bin@lsb@get#1#2{%
\def\avr@bin@lsb@get@helper##1##2\@nnil{%
\ifx&##2&%
\edef#2{##1}%
\else%
\avr@bin@lsb@get@helper ##2\@nnil%
\fi%
}%
\edef\@tempa{#1}%
\expandafter\avr@bin@lsb@get@helper\@tempa\@nnil
}
% Delete MSB: bs, \result,\carry
\def\avr@bin@msb@del#1#2#3{%
\def\avr@bin@msb@del@helper##1##2\@nnil{%
\edef#3{##1}%
\edef#2{##2}%
}%
\edef\@tempa{#1}%
\expandafter\avr@bin@msb@del@helper\@tempa\@nnil%
}
% Get MSB: bs, \carry
\def\avr@bin@msb@get#1#2{%
\def\avr@bin@msb@get@helper##1##2\@nnil{%
\edef#2{##1}%
}%
\edef\@tempa{#1}%
\expandafter\avr@bin@msb@get@helper\@tempa\@nnil%
}
% Get Higher Nibble: bs, \result
\def\avr@bin@nibble@high#1#2{%
\def\avr@bin@nibble@helper##1##2##3##4##5\@nnil{%
\edef#2{##1##2##3##4}%
}%
\edef\@tempa{#1}%
\expandafter\avr@bin@nibble@helper\@tempa\@nnil%
}
% Get Lower Nibble: bs, \result
\def\avr@bin@nibble@low#1#2{%
\def\avr@bin@nibble@helper##1##2##3##4##5\@nnil{%
\edef#2{##5}%
}%
\edef\@tempa{#1}%
\expandafter\avr@bin@nibble@helper\@tempa\@nnil%
}
\def\avr@bin@shiftright#1#2#3#4{%
\def\avr@bin@shiftright@helper##1\@nnil{%
\ifnum \avr@count@tmpa = 0%
\edef#3{##1}%
\else%
\avr@bin@lsb@del{##1}{\avr@bin@shiftright@bs}{\avr@bin@shiftright@carry}%
\edef#4{\avr@bin@shiftright@carry}%
\advance \avr@count@tmpa by -1\relax%
\edef\@tempa{0\avr@bin@shiftright@bs}%
\expandafter\avr@bin@shiftright@helper\@tempa\@nnil%
\fi%
}%
\edef\@tempa{#1}%
\edef#4{0}%
\avr@count@tmpa=#2\relax%
\expandafter\avr@bin@shiftright@helper\@tempa\@nnil%
}
\def\avr@bin@shiftright@arith#1#2#3#4{%
\def\avr@bin@shiftright@helper##1\@nnil{%
\ifnum \avr@count@tmpa = 0%
\edef#3{##1}%
\else%
\avr@bin@msb@get{##1}{\avr@bin@shiftright@sign}%
\avr@bin@lsb@del{##1}{\avr@bin@shiftright@bs}{\avr@bin@shiftright@carry}%
\edef#4{\avr@bin@shiftright@carry}%
\advance \avr@count@tmpa by -1\relax%
\edef\@tempa{\avr@bin@shiftright@sign \avr@bin@shiftright@bs}%
\expandafter\avr@bin@shiftright@helper\@tempa\@nnil%
\fi%
}%
\edef\@tempa{#1}%
\edef#4{0}%
\avr@count@tmpa=#2\relax%
\expandafter\avr@bin@shiftright@helper\@tempa\@nnil%
}
\def\avr@bin@shiftright@barrel#1#2#3#4{%
\def\avr@bin@shiftright@helper##1\@nnil{%
\ifnum \avr@count@tmpa = 0%
\edef#3{##1}%
\else%
\avr@bin@lsb@get{##1}{\avr@bin@shiftright@sign}%
\avr@bin@lsb@del{##1}{\avr@bin@shiftright@bs}{\avr@bin@shiftright@carry}%
\edef#4{\avr@bin@shiftright@carry}%
\advance \avr@count@tmpa by -1\relax%
\edef\@tempa{\avr@bin@shiftright@sign \avr@bin@shiftright@bs}%
\expandafter\avr@bin@shiftright@helper\@tempa\@nnil%
\fi%
}%
\edef\@tempa{#1}%
\edef#4{0}%
\avr@count@tmpa=#2\relax%
\expandafter\avr@bin@shiftright@helper\@tempa\@nnil%
}
%%% Local Variables:
%%% mode: latex
%%% TeX-master: "avr.tex"
%%% End: