@node bit 演算,,, 組み込み函数
@section bit 演算

@menu
* iand ior ixor::
* ishift::
@end menu

@node iand ior ixor,,, bit 演算
@subsection @code{iand}, @code{ior}, @code{ixor}
@findex iand
@findex ior
@findex ixor

@table @t
@item iand(@var{i1},@var{i2})
:: bit ごとの and
@item ior(@var{i1},@var{i2})
:: bit ごとの or
@item ixor(@var{i1},@var{i2})
:: bit ごとの xor
@end table

@table @var
@item return
整数
@item i1,i2
整数
@end table

@itemize @bullet
@item
整数 @var{i1}, @var{i2} の絶対値を bit 列とみて演算する. 
@item
引数の符号は無視し, 非負の値を返す. 
@end itemize

@example
[0] ctrl("hex",1);
0x1
[1] iand(0xeeeeeeeeeeeeeeee,0x2984723234812312312);
0x4622224802202202
[2] ior(0xa0a0a0a0a0a0a0a0,0xb0c0b0b0b0b0b0b);
0xabacabababababab
[3] ixor(0xfffffffffff,0x234234234234);
0x2cbdcbdcbdcb
@end example

@table @t
@item 参照
@fref{ishift}.
@end table

@node ishift,,, bit 演算
@subsection @code{ishift}
@findex ishift

@table @t
@item ishift(@var{i},@var{count})
:: bit shift
@end table

@table @var
@item return
整数
@item i,count
整数
@end table

@itemize @bullet
@item
整数 @var{i} の絶対値を bit 列とみて shift する. 
@item
@var{i} の符号は無視し, 非負の値を返す. 
@item
@var{count} が正ならば右 shift, 負ならば左 shift を行う. 
@end itemize

@example
[0] ctrl("hex",1);
0x1
[1] ishift(0x1000000,12); 
0x1000
[2] ishift(0x1000,-12);   
0x1000000
[3] ixor(0x1248,ishift(1,-16)-1);
@end example

@table @t
@item 参照
@fref{iand ior ixor}.
@end table