nextpnr/himbaechel
Joris van Zwieten 840311b5ac himbaechel/xilinx: give RAMB36 bels their area in the static placer
RAMB36E1 bels were registered with a zero bel_area while RAMB36E1
cells claim a 1x6 cell_area. With no capacity anywhere in the RAM
density map, the static placer cannot resolve RAMB36 density and
BRAM-heavy designs fail to converge to a legalisable placement.

Register the bel area as 1x6 to match the cell area, consistent with
the RAMB18 entries above.

Observed on a design using >90% of the BRAM on an xc7a100t.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
2026-07-30 15:49:52 +02:00
..
himbaechel_dbgen himbaechel: Extend API to enable cell delay override (#1535) 2025-08-20 06:32:18 +02:00
uarch himbaechel/xilinx: give RAMB36 bels their area in the static placer 2026-07-30 15:49:52 +02:00
.gitignore himbächel: Initial implementation 2023-05-13 08:26:41 +02:00
CMakeLists.txt himbaechel: Merge all test entrypoints into one 2026-07-27 11:01:32 +02:00
arch.cc himbaechel: Enable use of electrostatic placer (#1657) 2026-03-03 12:19:41 +01:00
arch.h himbaechel: bounds check getBelByLocation 2026-05-04 13:38:04 +02:00
arch_pybindings.cc himbaechel: Add Python binding for get_tile_wire_range 2025-06-25 18:37:17 +02:00
arch_pybindings.h himbächel: Initial implementation 2023-05-13 08:26:41 +02:00
archdefs.h Add GroupId related calls to Himbaechel API (#1399) 2024-12-05 13:59:33 +01:00
chipdb.h himbaechel: Extend API to enable cell delay override (#1535) 2025-08-20 06:32:18 +02:00
himbaechel_api.cc himbaechel: Enable use of electrostatic placer (#1657) 2026-03-03 12:19:41 +01:00
himbaechel_api.h himbaechel: Enable use of electrostatic placer (#1657) 2026-03-03 12:19:41 +01:00
himbaechel_constids.h himbächel: Initial implementation 2023-05-13 08:26:41 +02:00
himbaechel_gfxids.h Add GroupId related calls to Himbaechel API (#1399) 2024-12-05 13:59:33 +01:00
himbaechel_helpers.cc himbaechel: Add support for new constants API 2023-11-07 09:00:03 +01:00
himbaechel_helpers.h clangformat 2024-09-30 14:51:33 +02:00
main.cc himbaechel: add uarch specific options parsing (#1582) 2025-10-21 14:41:53 +02:00
test_main.cc himbaechel: Merge all test entrypoints into one 2026-07-27 11:01:32 +02:00