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synth_ice40: call wreduce before mul2dsp

This commit is contained in:
Eddie Hung 2020-01-17 15:41:55 -08:00
parent ad6c49fff1
commit 78ffd5d193
1 changed files with 2 additions and 1 deletions
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3
techlibs/ice40/synth_ice40.cc
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@ -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)");