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Refactor common parts of SAT-using optimizations into a helper.

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This also aligns the functionality:

- in all cases, the onehot attribute is used to create appropriate
  constraints (previously, opt_dff didn't do it at all, and share
  created one-hot constraints based on $pmux presence alone, which
  is unsound)
- in all cases, shift and mul/div/pow cells are now skipped when
  importing the SAT problem (previously only memory_share did this)
  — this avoids creating clauses for hard cells that are unlikely
  to help with proving the UNSATness needed for optimization
This commit is contained in:
Marcelina Kościelnicka
2021-08-09 16:54:35 +02:00
parent d8fcf1ab25
commit d25b9088c8
7 changed files with 224 additions and 153 deletions
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Makefile
+2 -1
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@@ -575,6 +575,7 @@ $(eval $(call add_include_file,kernel/modtools.h))
$(eval $(call add_include_file,kernel/macc.h))
$(eval $(call add_include_file,kernel/utils.h))
$(eval $(call add_include_file,kernel/satgen.h))
$(eval $(call add_include_file,kernel/qcsat.h))
$(eval $(call add_include_file,kernel/ff.h))
$(eval $(call add_include_file,kernel/ffinit.h))
$(eval $(call add_include_file,kernel/mem.h))
@@ -599,7 +600,7 @@ ifneq ($(ABCEXTERNAL),)
kernel/yosys.o: CXXFLAGS += -DABCEXTERNAL='"$(ABCEXTERNAL)"'
endif
endif
OBJS += kernel/cellaigs.o kernel/celledges.o kernel/satgen.o kernel/mem.o kernel/ffmerge.o
OBJS += kernel/cellaigs.o kernel/celledges.o kernel/satgen.o kernel/qcsat.o kernel/mem.o kernel/ffmerge.o
kernel/log.o: CXXFLAGS += -DYOSYS_SRC='"$(YOSYS_SRC)"'
kernel/yosys.o: CXXFLAGS += -DYOSYS_DATDIR='"$(DATDIR)"' -DYOSYS_PROGRAM_PREFIX='"$(PROGRAM_PREFIX)"'