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authorEddie Hung <eddie@fpgeh.com>2020-01-27 12:29:28 -0800
committerEddie Hung <eddie@fpgeh.com>2020-01-27 12:29:28 -0800
commitf2576c096cedf0974f237530a9d50e250bf117a3 (patch)
tree3f5a0653615a125b0b51a2b135f5ac6d0b95794b /techlibs/ice40/synth_ice40.cc
parentb0605128b633f64b07107ba3a673f406e96d42ad (diff)
parent9009b76a69b9e867f69295a8e555305925e83aeb (diff)
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Merge branch 'eddie/abc9_refactor' into eddie/abc9_required
Diffstat (limited to 'techlibs/ice40/synth_ice40.cc')
-rw-r--r--techlibs/ice40/synth_ice40.cc3
1 files changed, 2 insertions, 1 deletions
diff --git a/techlibs/ice40/synth_ice40.cc b/techlibs/ice40/synth_ice40.cc
index 121bcff1f..d92e40726 100644
--- a/techlibs/ice40/synth_ice40.cc
+++ b/techlibs/ice40/synth_ice40.cc
@@ -273,7 +273,8 @@ struct SynthIce40Pass : public ScriptPass
run("opt_expr");
run("opt_clean");
if (help_mode || dsp) {
- run("memory_dff");
+ run("memory_dff"); // ice40_dsp will merge registers, reserve memory port registers first
+ run("wreduce t:$mul");
run("techmap -map +/mul2dsp.v -map +/ice40/dsp_map.v -D DSP_A_MAXWIDTH=16 -D DSP_B_MAXWIDTH=16 "
"-D DSP_A_MINWIDTH=2 -D DSP_B_MINWIDTH=2 -D DSP_Y_MINWIDTH=11 "
"-D DSP_NAME=$__MUL16X16", "(if -dsp)");