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Do not pack registers if (* keep *)

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This commit is contained in:
Eddie Hung 2019-08-07 12:57:10 -07:00
parent c39b1a6fcf
commit cdf9c80134
1 changed files with 20 additions and 0 deletions
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20
passes/pmgen/ice40_dsp.pmg
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@ -23,6 +23,10 @@ code sigA clock clock_pol
sigA = port(mul, \A); sigA = port(mul, \A);
if (ffA) { if (ffA) {
for (auto b : port(ffA, \Q))
if (b.wire->get_bool_attribute(\keep))
reject;
clock = port(ffA, \CLK).as_bit(); clock = port(ffA, \CLK).as_bit();
clock_pol = param(ffA, \CLK_POLARITY).as_bool(); clock_pol = param(ffA, \CLK_POLARITY).as_bool();
@ -41,6 +45,10 @@ code sigB clock clock_pol
sigB = port(mul, \B); sigB = port(mul, \B);
if (ffB) { if (ffB) {
for (auto b : port(ffB, \Q))
if (b.wire->get_bool_attribute(\keep))
reject;
SigBit c = port(ffB, \CLK).as_bit(); SigBit c = port(ffB, \CLK).as_bit();
bool cp = param(ffB, \CLK_POLARITY).as_bool(); bool cp = param(ffB, \CLK_POLARITY).as_bool();
@ -67,6 +75,10 @@ code sigH sigO clock clock_pol
if (ffH) { if (ffH) {
sigH = port(ffH, \Q); sigH = port(ffH, \Q);
for (auto b : sigH)
if (b.wire->get_bool_attribute(\keep))
reject;
sigO = sigH; sigO = sigH;
SigBit c = port(ffH, \CLK).as_bit(); SigBit c = port(ffH, \CLK).as_bit();
@ -159,6 +171,10 @@ endmatch
code clock clock_pol sigO sigCD code clock clock_pol sigO sigCD
if (ffO_lo || ffO_hi) { if (ffO_lo || ffO_hi) {
if (ffO_lo) { if (ffO_lo) {
for (auto b : port(ffO_lo, \Q))
if (b.wire->get_bool_attribute(\keep))
reject;
SigBit c = port(ffO_lo, \CLK).as_bit(); SigBit c = port(ffO_lo, \CLK).as_bit();
bool cp = param(ffO_lo, \CLK_POLARITY).as_bool(); bool cp = param(ffO_lo, \CLK_POLARITY).as_bool();
@ -173,6 +189,10 @@ code clock clock_pol sigO sigCD
} }
if (ffO_hi) { if (ffO_hi) {
for (auto b : port(ffO_hi, \Q))
if (b.wire->get_bool_attribute(\keep))
reject;
SigBit c = port(ffO_hi, \CLK).as_bit(); SigBit c = port(ffO_hi, \CLK).as_bit();
bool cp = param(ffO_hi, \CLK_POLARITY).as_bool(); bool cp = param(ffO_hi, \CLK_POLARITY).as_bool();