From 677b8ed3ca70dad1dec288c274e64ebb0ef4011b Mon Sep 17 00:00:00 2001
From: David Shah <dave@ds0.me>
Date: Thu, 18 Oct 2018 19:39:48 +0100
Subject: ecp5: Add latch inference
Signed-off-by: David Shah <dave@ds0.me>
---
techlibs/ecp5/Makefile.inc | 1 +
techlibs/ecp5/latches_map.v | 11 +++++++++++
techlibs/ecp5/synth_ecp5.cc | 3 ---
3 files changed, 12 insertions(+), 3 deletions(-)
create mode 100644 techlibs/ecp5/latches_map.v
diff --git a/techlibs/ecp5/Makefile.inc b/techlibs/ecp5/Makefile.inc
index f45859392..9b6f061bd 100644
--- a/techlibs/ecp5/Makefile.inc
+++ b/techlibs/ecp5/Makefile.inc
@@ -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
diff --git a/techlibs/ecp5/latches_map.v b/techlibs/ecp5/latches_map.v
new file mode 100644
index 000000000..c28f88cf7
--- /dev/null
+++ b/techlibs/ecp5/latches_map.v
@@ -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
diff --git a/techlibs/ecp5/synth_ecp5.cc b/techlibs/ecp5/synth_ecp5.cc
index ab56a9444..cb6a4c3d8 100644
--- a/techlibs/ecp5/synth_ecp5.cc
+++ b/techlibs/ecp5/synth_ecp5.cc
@@ -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
--
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