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ecp5: Add latch inference 

Signed-off-by: David Shah <dave@ds0.me>
This commit is contained in:
David Shah 2018-10-18 19:39:48 +01:00
parent 6514443a5c
commit 677b8ed3ca
3 changed files with 12 additions and 3 deletions
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1
techlibs/ecp5/Makefile.inc
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@ -8,6 +8,7 @@ $(eval $(call add_share_file,share/ecp5,techlibs/ecp5/dram.txt))
$(eval $(call add_share_file,share/ecp5,techlibs/ecp5/brams_map.v))
$(eval $(call add_share_file,share/ecp5,techlibs/ecp5/bram.txt))
$(eval $(call add_share_file,share/ecp5,techlibs/ecp5/arith_map.v))
$(eval $(call add_share_file,share/ecp5,techlibs/ecp5/latches_map.v))
EXTRA_OBJS += techlibs/ecp5/brams_init.mk techlibs/ecp5/brams_connect.mk
.SECONDARY: techlibs/ecp5/brams_init.mk techlibs/ecp5/brams_connect.mk

11
techlibs/ecp5/latches_map.v Normal file
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@ -0,0 +1,11 @@
module \$_DLATCH_N_ (E, D, Q);
wire [1023:0] _TECHMAP_DO_ = "simplemap; opt";
input E, D;
output Q = !E ? D : Q;
endmodule
module \$_DLATCH_P_ (E, D, Q);
wire [1023:0] _TECHMAP_DO_ = "simplemap; opt";
input E, D;
output Q = E ? D : Q;
endmodule

3
techlibs/ecp5/synth_ecp5.cc
View File

@ -266,10 +266,7 @@ struct SynthEcp5Pass : public ScriptPass
if (abc2 || help_mode) {
run("abc", " (only if -abc2)");
}
//TODO
#if 0
run("techmap -map +/ecp5/latches_map.v");
#endif
if (nomux)
run("abc -lut 4");
else