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49 Commits

Author SHA1 Message Date
Keith Rothman
2285c8dbbd Initial refactoring of placer API. 
Signed-off-by: Keith Rothman <537074+litghost@users.noreply.github.com>
 2021-02-02 07:34:56 -08:00
D. Shah
94e8847d67 cleanup: Spelling fixes 
Signed-off-by: D. Shah <dave@ds0.me>
 2021-01-28 15:19:06 +00:00
D. Shah
6ecf7f86c8 cleanup: Remove dead/unused code 
Note that some '#if 0' code that might still be useful for debugging in
the future has been retained.

Signed-off-by: D. Shah <dave@ds0.me>
 2021-01-28 14:59:13 +00:00
Per Grön
60276e3447 C++17 compatibility: Don't use std::random_shuffle 
std::random_shuffle deprecated in C++14 and was removed in C++17.
 2020-12-30 18:53:32 +01:00
David Shah
1df8ac805a HeAP: Add timeout to IO placement 
Signed-off-by: David Shah <dave@ds0.me>
 2020-06-25 19:42:53 +01:00
whitequark
e7bb04769d Port nextpnr-{ice40,ecp5} to WASI. 
This involves very few changes, all typical to WASM ports:
  * WASM doesn't currently support threads or atomics so those are
    disabled.
  * WASM doesn't currently support exceptions so the exception
    machinery is stubbed out.
  * WASM doesn't (and can't) have mmap(), so an emulation library is
    used. That library currently doesn't support MAP_SHARED flags,
    so MAP_PRIVATE is used instead.

There is also an update to bring ECP5 bbasm CMake rules to parity
with iCE40 ones, since although it is possible to embed chipdb into
nextpnr on WASM, a 200 MB WASM file has very few practical uses.

The README is not updated and there is no included toolchain file
because at the moment it's not possible to build nextpnr with
upstream boost and wasi-libc. Boost requires a patch (merged, will
be available in boost 1.74.0), wasi-libc requires a few unmerged
patches.
 2020-05-23 20:57:26 +00:00
David Shah
9125698cb0 HeAP: backport out-of-range fix 
Signed-off-by: David Shah <dave@ds0.me>
 2020-02-12 10:41:27 +00:00
David Shah
1cb0e3af03 HeAP: Add X and Y scaling factors for asymmetric arches 
Signed-off-by: David Shah <dave@ds0.me>
 2020-02-12 10:41:27 +00:00
David Shah
7db1484c75 HeAP: Make beta configurable 
Signed-off-by: David Shah <dave@ds0.me>
 2020-02-12 10:41:27 +00:00
David Shah
d1f5cdcb93 HeAP: Improve handling of heterogeneous slice arches 
Signed-off-by: David Shah <dave@ds0.me>
 2020-02-12 10:41:27 +00:00
David Shah
1ff060c5ad HeAP: Make solver tolerance arch-configurable 
Signed-off-by: David Shah <dave@ds0.me>
 2020-02-12 10:41:27 +00:00
David Shah
abfe31d5d2 HeAP: increase timeout 
Signed-off-by: David Shah <dave@ds0.me>
 2019-12-30 15:53:24 +00:00
David Shah
89e15d488a HeAP: fix region constraint handling 
Signed-off-by: David Shah <dave@ds0.me>
 2019-12-01 14:18:10 +00:00
David Shah
4916eb9bb1 HeAP: more realistic timeout threshold 
Signed-off-by: David Shah <dave@ds0.me>
 2019-11-26 21:45:46 +00:00
David Shah
523ed4cfb2 HeAP: improve error handling when stuck 
Signed-off-by: David Shah <dave@ds0.me>
 2019-11-26 10:16:27 +00:00
David Shah
75f403db60 HeAP: support for bel region constraints 
Signed-off-by: David Shah <dave@ds0.me>
 2019-11-26 10:01:33 +00:00
David Shah
1839a3a770 Major Property improvements for common and iCE40 
Signed-off-by: David Shah <dave@ds0.me>
 2019-08-05 14:52:15 +01:00
Miodrag Milanovic
bd694bda19 Switching from std to boost fix crash 2019-07-05 10:22:42 +02:00
Miodrag Milanovic
831c7f2ef1 Speedup critical path 2019-06-28 13:43:55 +02:00
Miodrag Milanovic
8d5724f4fd moved some context variables to settings 2019-06-15 15:23:51 +02:00
Miodrag Milanovic
95280060b8 No need for settings class 2019-06-15 13:09:49 +02:00
David Shah
db152b332b HeAP: Don't call Eigen if system is empty 
Fixes #259

Signed-off-by: David Shah <dave@ds0.me>
 2019-04-01 12:18:02 +01:00
David Shah
25e3350675 HeAP: Make log output more consistent 
Signed-off-by: David Shah <dave@ds0.me>
 2019-03-25 15:39:15 +00:00
David Shah
00b09fbb43 HeAP: Per-iteration output all on one line 
Signed-off-by: David Shah <dave@ds0.me>
 2019-03-24 11:18:38 +00:00
David Shah
bd12c0a486 HeAP: Add PlacerHeapCfg 
Signed-off-by: David Shah <dave@ds0.me>
 2019-03-22 10:31:54 +00:00
David Shah
7142db28a8 HeAP: Make HeAP placer optional 
A CMake option 'BUILD_HEAP' (default on) configures building of the
HeAP placer and the associated Eigen3 dependency.

Default for the iCE40 is SA placer, with --heap-placer to use HeAP

Default for the ECP5 is HeAP placer, as SA placer can take 1hr+ for
large ECP5 designs and HeAP tends to give better QoR. --sa-placer can
be used to use SA instead, and auto-fallback to SA if HeAP not built.

Signed-off-by: David Shah <dave@ds0.me>
 2019-03-22 10:31:54 +00:00
David Shah
1c824709e2 HeAP: Switching from TAUCS to Eigen 
Signed-off-by: David Shah <davey1576@gmail.com>
 2019-03-22 10:31:54 +00:00
David Shah
8e4e03d980 HeAP: Fix occupancy count 
Signed-off-by: David Shah <davey1576@gmail.com>
 2019-03-22 10:31:54 +00:00
David Shah
6cf001d355 HeAP: Legaliser fixes 
Signed-off-by: David Shah <dave@ds0.me>
 2019-03-22 10:31:54 +00:00
David Shah
352f15e96b HeAP: Avoid getting stuck in legaliser ripup 
Signed-off-by: David Shah <dave@ds0.me>
 2019-03-22 10:31:54 +00:00
David Shah
70a6379bf6 HeAP: Chain support 
Signed-off-by: David Shah <dave@ds0.me>
 2019-03-22 10:31:54 +00:00
David Shah
2e2f44c82e HeAP: tidying up 
Signed-off-by: David Shah <dave@ds0.me>
 2019-03-22 10:31:54 +00:00
David Shah
fb02fc69c6 HeAP: Make strict legalisation wirelength driven where needed 
Signed-off-by: David Shah <dave@ds0.me>
 2019-03-22 10:31:54 +00:00
David Shah
8295f997ae HeAP: Use for ECP5 as well as iCE40 
Signed-off-by: David Shah <dave@ds0.me>
 2019-03-22 10:31:54 +00:00
David Shah
ba1e05f16b HeAP: Implement 'all+rotate' HeAP strategy 
Signed-off-by: David Shah <dave@ds0.me>
 2019-03-22 10:31:54 +00:00
David Shah
3dedc62593 HeAP: Weight arcs by criticality for timing-driven placement 
Signed-off-by: David Shah <dave@ds0.me>
 2019-03-22 10:31:54 +00:00
David Shah
05e9ae183d HeAP: Add multithreading 
Signed-off-by: David Shah <dave@ds0.me>
 2019-03-22 10:31:54 +00:00
David Shah
eb638c47b3 HeAP: fine tuning 
Signed-off-by: David Shah <dave@ds0.me>
 2019-03-22 10:31:54 +00:00
David Shah
2a0c117662 HeAP: Add performance counters 
Signed-off-by: David Shah <dave@ds0.me>
 2019-03-22 10:31:54 +00:00
David Shah
f3d9b45387 HeAP: Add SA-based iterative refinement after AP 
Signed-off-by: David Shah <dave@ds0.me>
 2019-03-22 10:31:54 +00:00
David Shah
0570cb7ae9 HeAP: Spreading working acceptably 
Signed-off-by: David Shah <dave@ds0.me>
 2019-03-22 10:31:54 +00:00
David Shah
030b02588b HeAP: Make cut-based spreading recursive 
Signed-off-by: David Shah <dave@ds0.me>
 2019-03-22 10:31:54 +00:00
David Shah
b483008cdf HeAP: Cut peturbation, binning and intra-bin linear spreading 
Signed-off-by: David Shah <dave@ds0.me>
 2019-03-22 10:31:54 +00:00
David Shah
8a791e8309 HeAP: Cut finder for spreading 
Signed-off-by: David Shah <dave@ds0.me>
 2019-03-22 10:31:54 +00:00
David Shah
4d2906378f HeAP: Region finder for spreading and strict legaliser 
Signed-off-by: David Shah <dave@ds0.me>
 2019-03-22 10:31:54 +00:00
David Shah
d1808c2594 HeAP: Fix how initial placement handles chains 
Signed-off-by: David Shah <dave@ds0.me>
 2019-03-22 10:31:54 +00:00
David Shah
d5cfd38179 HeAP: Successful solver convergance 
Signed-off-by: David Shah <dave@ds0.me>
 2019-03-22 10:31:54 +00:00
David Shah
ea56dc9d08 HeAP: Add TAUCS wrapper and integration 
Signed-off-by: David Shah <dave@ds0.me>
 2019-03-22 10:31:54 +00:00
David Shah
e36460b83e HeAP: Initial infrastructure 
Signed-off-by: David Shah <dave@ds0.me>
 2019-03-22 10:31:54 +00:00