Series 2600 System SourceMeters Reference Manual Instrument Control Library 12-13
Return to Section 12 topics 2600S-901-01 Rev. A / May 2006
bit functions
Logic and bit operations
The bit functions are used to perform bitwise logic operations on two given numbers, and
bit operations on one given number. Logic and bit operations truncate the fractional part of
given numbers to make them integers.
NOTE The TSP stores all numbers internally as single precision IEEE-754 floating
point values. The internal number representation only stores 24 bits of
numeric data. The logic operations will work correctly for all integer values
between 0 and 4294967295. However, only the 24 most significant bits will
be stored for the return value.
Logic operations – The bit.bitand, bit.bitor and bit.bitxor functions in this group
perform logic operations on two numbers. The TSP will perform the indicated logic
operation on the binary equivalents of the two integers. Logic operations are performed
bitwise. That is, bit 1 of the first number is AND’ed, OR’ed or XOR’ed with bit 1 of the
second number. Bit 2 of the first number is AND’ed, OR’ed or XOR’ed with bit 2 of the
second number. This bitwise logic operation is performed on all corresponding bits of the
two numbers. The result of a logic operation will be returned as an integer.
Bit operations – The rest of the functions in this group are used for operations on the bits
of a given number. These functions can be used to clear a bit, toggle a bit, test a bit, set a
bit (or bit field) and retrieve the weighted value of a bit (or field value). All of these
functions use an
index parameter to “point” to the bit position of the given number. The
least significant bit of a given number has an index of 1, and the most significant bit has an
index of 32.
bit.bitand
Function Performs a bitwise logical AND operation on two numbers.
Usage
value = bit.bitand(value1, value2)
value1 First number for the AND operation.
value2 Second number for the AND operation.
value Returned result of the AND operation.
Remarks
• This function performs a logical AND operation on two numbers.
• Any fractional parts of value1 and value2 are truncated to make them integers.
The returned
value is also an integer.
• See “Logic and bit operations” on page 12-13 for more information.
Also see bit.bitor, bit.bitxor
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