diff options
Diffstat (limited to 'passes/pmgen/ice40_dsp.pmg')
| -rw-r--r-- | passes/pmgen/ice40_dsp.pmg | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/passes/pmgen/ice40_dsp.pmg b/passes/pmgen/ice40_dsp.pmg index 58e1ce0e0..96c62e313 100644 --- a/passes/pmgen/ice40_dsp.pmg +++ b/passes/pmgen/ice40_dsp.pmg @@ -100,6 +100,16 @@ code addAB sigS addAB = addB; sigS = port(addB, \A); } + if (addAB) { + int natural_mul_width = GetSize(sigA) + GetSize(sigB); + int actual_mul_width = GetSize(sigY); + int actual_acc_width = GetSize(sigS); + + if ((actual_acc_width > actual_mul_width) && (natural_mul_width > actual_mul_width)) + reject; + if ((actual_acc_width != actual_mul_width) && (param(mul, \A_SIGNED).as_bool() != param(addAB, \A_SIGNED).as_bool())) + reject; + } endcode match muxA |