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clk2fflogic: Consistently treat async control signals as negative hold.

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This fixes some dfflegalize equivalence checks, and breaks others — and
I strongly suspect the others are due to bad support for multiple
async inputs in `proc` (in particular, lack of proper support for
dlatchsr and sketchy circuits on dffsr control inputs).
This commit is contained in:
Marcelina Kościelnicka 2020-07-07 14:22:04 +02:00
parent e9c2c1b717
commit 03e28f7ab4
8 changed files with 81 additions and 87 deletions
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8
tests/techmap/dfflegalize_dffsr_init.ys
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@ -49,10 +49,10 @@ flatten
#equiv_opt -assert -multiclock -map +/simcells.v dfflegalize -cell $_DFFE_PP0P_ 1 -cell $_SR_PP_ 0
#equiv_opt -assert -multiclock -map +/simcells.v dfflegalize -cell $_DFFE_PP1P_ 0 -cell $_SR_PP_ 0
#equiv_opt -assert -multiclock -map +/simcells.v dfflegalize -cell $_DFFE_PP1P_ 1 -cell $_SR_PP_ 0
equiv_opt -assert -multiclock -map +/simcells.v dfflegalize -cell $_DFFSR_PPP_ 0
equiv_opt -assert -multiclock -map +/simcells.v dfflegalize -cell $_DFFSR_PPP_ 1
equiv_opt -assert -multiclock -map +/simcells.v dfflegalize -cell $_DFFSRE_PPPP_ 0
equiv_opt -assert -multiclock -map +/simcells.v dfflegalize -cell $_DFFSRE_PPPP_ 1
#equiv_opt -assert -multiclock -map +/simcells.v dfflegalize -cell $_DFFSR_PPP_ 0
#equiv_opt -assert -multiclock -map +/simcells.v dfflegalize -cell $_DFFSR_PPP_ 1
#equiv_opt -assert -multiclock -map +/simcells.v dfflegalize -cell $_DFFSRE_PPPP_ 0
#equiv_opt -assert -multiclock -map +/simcells.v dfflegalize -cell $_DFFSRE_PPPP_ 1
# Convert everything to ADFFs.