17 lines
742 B
Factor
17 lines
742 B
Factor
USING: help.markup help.syntax kernel math sequences ;
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IN: math.bitfields.lib
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HELP: bits
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{ $values { "m" integer } { "n" integer } { "m'" integer } }
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{ $description "Keep only n bits from the integer m." }
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{ $example "USING: math.bitfields.lib prettyprint ;" "HEX: 123abcdef 16 bits .h" "cdef" } ;
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HELP: bitroll
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{ $values { "x" "an integer (input)" } { "s" "an integer (shift)" } { "w" "an integer (wrap)" } { "y" integer } }
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{ $description "Roll n by s bits to the left, wrapping around after w bits." }
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{ $examples
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{ $example "USING: math.bitfields.lib prettyprint ;" "1 -1 32 bitroll .b" "10000000000000000000000000000000" }
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{ $example "USING: math.bitfields.lib prettyprint ;" "HEX: ffff0000 8 32 bitroll .h" "ff0000ff" }
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} ;
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