| Embedded Target for Texas Instruments C6000 DSPs | |
Return the minimum exponent (number of extra sign bits) found in each channel of an input
Library
C62x DSP Library--Math and Matrices
Description
The Block Exponent block first computes the number of extra sign bits of all values in each channel of an input signal, and then returns the minimum number of sign bits found in each channel. The number of elements in each input channel must be even and at least six. All input elements must be 32-bit signed fixed-point data types. The output is a vector of 16-bit integers--one integer for each channel of the input signal.
This block is useful for determining whether every sample in a channel is using extra sign bits. If so, you can scale your signal by the minimum number of extra sign bits to eliminate the common extra bits. This increases the representable precision and decreases the representable range of the signal.
The Block Exponent block supports both continuous and discrete sample times. This block also supports both little-endian and big-endian code generation.
Dialog Box
Algorithm
In simulation, the Block Exponent block is equivalent to the TMS320C62x DSP Library assembly code function DSP_bexp. During code generation, this block calls the DSP_bexp routine given to produce optimized code.
| | Bit Reverse | C6701 EVM ADC | |
