National Instruments AutoCode NI MATRIX - Manual (Page 11)

Contents
© National Instruments Corporation xi AutoCode Reference
Definitions and Conventions ...........................................................................5-45
Shared Memory Fixed-Point Callouts in AutoCode/C .....................5-46
Shared Variable Block Support .......................................................................5-47
Shared Memory Callout Option ........................................................5-50
Global Variable Block Callouts.......................................................................5-51
Callout Pairs ......................................................................................5-51
Non-Shared (Local) Global Variable Blocks....................................5-51
Shared Global Variable Blocks.........................................................5-53
Chapter 6
Vectorized Code Generation
Introduction....................................................................................................................6-1
How Code Is Generated...................................................................................6-1
Scalar Gain Block Example ..............................................................6-2
Vectorized Gain Block Example.......................................................6-3
Array Subscripts................................................................................6-4
Signal Connectivity .........................................................................................6-5
Block Outputs ...................................................................................6-5
Block Inputs ......................................................................................6-5
Vectorization Modes......................................................................................................6-7
Maximal Vectorization ....................................................................................6-7
Mixed Vectorization........................................................................................6-7
Vector Labels and Names .................................................................6-8
Example ...........................................................................................................6-8
Vectorization Features ...................................................................................................6-14
Multiple Arrays within a Block.......................................................................6-15
Split-Merge Inefficiency .................................................................................6-17
Split Vector .......................................................................................6-17
Merge ................................................................................................6-19
External Outputs..............................................................................................6-21
Copy-Back ........................................................................................6-21
Eliminating Copy-Back.....................................................................6-23
Other Copy-Back Scenarios..............................................................6-23
Vectorized Standard Procedure Interface ........................................................6-23
Ada Array Aggregates and Slices....................................................................6-25
Vectorization of the BlockScript Block.........................................................................6-27
Matrix Outputs ...............................................................................................................6-28