diff options
Diffstat (limited to 'passes/pmgen/ice40_dsp.pmg')
| -rw-r--r-- | passes/pmgen/ice40_dsp.pmg | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/passes/pmgen/ice40_dsp.pmg b/passes/pmgen/ice40_dsp.pmg index fca307453..9d649cb98 100644 --- a/passes/pmgen/ice40_dsp.pmg +++ b/passes/pmgen/ice40_dsp.pmg @@ -56,10 +56,12 @@ code sigA sigB sigH break; sigH.append(O[i]); } - log_assert(nusers(O.extract_end(i)) <= 1); - - if (sigH.empty()) + // This sigM could have no users if downstream sinks (e.g. $add) is + // narrower than $mul result, for example + if (i == 0) reject; + + log_assert(nusers(O.extract_end(i)) <= 1); endcode code argQ ffA ffAholdmux ffArstmux ffAholdpol ffArstpol sigA clock clock_pol |