3.6.1.21 Contention-Free Memory Access

Syntax
#pragma HLS memory impl variable(<arg_name>) contention_free(true|false)
Description
The pragma is to be used for variables accessed by parallel functions (hls::thread) so that SmartHLS™ does not create arbiters for the specified variable. The specified variable can still be accessed by multiple concurrently running functions, but without contention. It will be the users' responsibility to ensure at most one function may access the shared variable in a clock cycle. If not specified, by default, SmartHLS creates arbiters for variables that are accessed by parallel functions.
Parameters
ParameterValueOptionalDefaultDescription
variablestringNo-Variable Name
contention_freetrue|falseYesfalsetrue for contention-free access
Position
Before the global / local variable declaration.
Examples
#pragma HLS memory impl variable(b) contention_free(true)
int b[100]