Description
These top-level keys appear directly under the [hls] header — not under a syn.* prefix.
Syntax
| Option | Config File Key | Default | Description |
|---|---|---|---|
| clock | clock=<value> | 10ns | Target clock period. Use ns suffix for nanoseconds or MHz suffix for frequency. E.g. clock=8ns, clock=250MHz. |
| clock_uncertainty | clock_uncertainty=<value> | 27% | Timing uncertainty/margin. Accepts percentage (`15%`) or nanoseconds (`1.5ns`). |
| relative_roots | relative_roots=<path_list> | — | Ordered list of absolute paths used to resolve relative file paths in syn.file / tb.file. |
Tcl Equivalents
create_clock -period <value> → clock; set_clock_uncertainty -uncertainty <val> → clock_uncertainty.Example
[hls]
clock=8ns
clock_uncertainty=15%
default_axi=1
relative_roots=/proj/hls/src:/proj/hls/tb