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flow: add RTLMP_KEEP_CLUSTERING option #4412

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flow: add RTLMP_KEEP_CLUSTERING option #4412

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2 changes: 2 additions & 0 deletions docs/user/FlowVariables.md
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Expand Up @@ -255,6 +255,7 @@ configuration file.
| <a name="RTLMP_FENCE_LY"></a>RTLMP_FENCE_LY| Defines the lower left Y coordinate for the global fence bounding box in microns.| 0.0|
| <a name="RTLMP_FENCE_UX"></a>RTLMP_FENCE_UX| Defines the upper right X coordinate for the global fence bounding box in microns.| 0.0|
| <a name="RTLMP_FENCE_UY"></a>RTLMP_FENCE_UY| Defines the upper right Y coordinate for the global fence bounding box in microns.| 0.0|
| <a name="RTLMP_KEEP_CLUSTERING"></a>RTLMP_KEEP_CLUSTERING| Set to 1 to store the RTL macro placer's clustering hierarchy in the ODB as nested dbGroups.| 0|
| <a name="RTLMP_MAX_INST"></a>RTLMP_MAX_INST| Maximum number of standard cells in a cluster. If unset, rtl_macro_placer will calculate a value based on the design attributes.| |
| <a name="RTLMP_MAX_LEVEL"></a>RTLMP_MAX_LEVEL| Maximum depth of the physical hierarchy tree.| 2|
| <a name="RTLMP_MAX_MACRO"></a>RTLMP_MAX_MACRO| Maximum number of macros in a cluster. If unset, rtl_macro_placer will calculate a value based on the design attributes.| |
Expand Down Expand Up @@ -429,6 +430,7 @@ configuration file.
- [RTLMP_FENCE_LY](#RTLMP_FENCE_LY)
- [RTLMP_FENCE_UX](#RTLMP_FENCE_UX)
- [RTLMP_FENCE_UY](#RTLMP_FENCE_UY)
- [RTLMP_KEEP_CLUSTERING](#RTLMP_KEEP_CLUSTERING)
- [RTLMP_MAX_INST](#RTLMP_MAX_INST)
- [RTLMP_MAX_LEVEL](#RTLMP_MAX_LEVEL)
- [RTLMP_MAX_MACRO](#RTLMP_MAX_MACRO)
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2 changes: 2 additions & 0 deletions flow/scripts/macro_place_util.tcl
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Expand Up @@ -53,6 +53,8 @@ if { [find_macros] != "" } {
append_env_var additional_rtlmp_args RTLMP_BOUNDARY_WT -boundary_weight 1
append_env_var additional_rtlmp_args RTLMP_NOTCH_WT -notch_weight 1
append_env_var additional_rtlmp_args RTLMP_RPT_DIR -report_directory 1
append_env_var additional_rtlmp_args RTLMP_KEEP_CLUSTERING \
-keep_clustering_data 0
append_env_var additional_rtlmp_args RTLMP_FENCE_LX -fence_lx 1
append_env_var additional_rtlmp_args RTLMP_FENCE_LY -fence_ly 1
append_env_var additional_rtlmp_args RTLMP_FENCE_UX -fence_ux 1
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7 changes: 7 additions & 0 deletions flow/scripts/variables.json
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7 changes: 7 additions & 0 deletions flow/scripts/variables.yaml
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Expand Up @@ -1448,6 +1448,13 @@ RTLMP_ARGS:
Overrides all other RTL macro placer arguments.
stages:
- floorplan
RTLMP_KEEP_CLUSTERING:
description: >
Set to 1 to store the RTL macro placer's clustering hierarchy in the ODB as
nested dbGroups.
default: 0
stages:
- floorplan
Comment on lines +1456 to +1457

@AcKoucher AcKoucher Aug 11, 2026

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default: 0

GDS_ALLOW_EMPTY:
description: >
Single regular expression of module names of macros that have no .gds file
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