extract specified bits from a number
GetBits(number, locns, options)
a single or sequence of locations or ranges
The GetBits command extracts the specified bits from a number. The locns argument can be a sequence of bit locations or bit location ranges, including negative ranges and negative offsets. Note that all bit locations are given with 0 as the location of the least significant bit. For example, -1..0 can be used to extract the bits in a number in reverse order.
The optional arguments for GetBits are as follows:
output=form: where form can be sequence (the default), or number. When form is specified as sequence, the output will be in the form of a sequence of 0's and 1's corresponding to the specified bit locations. When form is specified as number, the bit sequence will be used to construct a number, where the first bit in locns will be the least significant bit in the output number.
bits=count: specifies the number of bits in the input number. Any bit references that exceed this value will have a value of zero. Any negative bit references that go past the least significant bit will return an error. The default bits value can be set via Settings.
Get least significant bit.
Get most significant bit. (This will be 1 if bits is not specified.)
Get most significant bit assuming input is 16 bits
Extract all bits - this is the same as Split
Reverse order of the bits as a 16 bit number
Reverse order as a 16 bit number with number output is equivalent to extracting in reverse above followed by join
Exchange first 8 bits and last 8 bits in a 16 bit number
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