A newer version of this document is available. Customers should click here to go to the newest version.
- 15.3.12. Fully-Parallel FFTs with Flexible Ordering (FFT2X, FFT4X, FFT8X, FFT16X, FFT32X, and FFT64X)
- 15.3.13. General Multitwiddle and General Twiddle (GeneralMultiTwiddle, GeneralMultVTwiddle, GeneralTwiddle, GeneralVTwiddle)
15.4.9. Bit Extract (BitExtract)
q = (a >> LSB)
If bit position is a negative number, the bit position is an offset from the MSB instead of LSB.
If the BitExtract block initialization parameter is a vector of LSB positions, the output is a vector of matching width, even if the input is a scalar signal. Use this feature to split a wide data line into a vector of Boolean signals. The components are in the same order as you specify in the initialization parameter. If the input to the BitCombine block is a vector, the width of any vector initialization parameter must match, and then a different bit can be selected from each component in the vector. The output data type does not always have to be Boolean signals. For example, setting to uint8 provides a simple way to split one wide signal into a vector of unsigned 8-bit data lines.
|Output data type mode||Determines how the block sets its output data type:
|Output data type||Specifies the output data type. For example, sfix(16), uint(8).|
|Output scaling value||Specifies the output scaling value. For example, 2^-15.|
|Least Significant Bit Position from Input Word||Specifies the bit position from the input word as the LSB in the output word.|
|Signal||Direction||Type||Description||Vector Data Support||Complex Data Support|
|a||Input||Any fixed-point type||Operand||Yes||No|
|q||Output||Derived fixed-point type||Result||Yes||No|
Did you find the information on this page useful?