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Small cleanup

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This commit is contained in:
Eddie Hung 2019-09-20 08:41:28 -07:00
parent 8cfcaf108e
commit a0d3ecf8c6
1 changed files with 18 additions and 19 deletions
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37
passes/pmgen/ice40_dsp.pmg
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@ -1,5 +1,6 @@
pattern ice40_dsp
udata <std::function<SigSpec(const SigSpec&)>> unextend
state <SigBit> clock
state <bool> clock_pol cd_signed o_lo
state <SigSpec> sigA sigB sigCD sigH sigO
@ -27,6 +28,19 @@ match mul
endmatch
code sigA sigB sigH
unextend = [](const SigSpec &sig) {
int i;
for (i = GetSize(sig)-1; i > 0; i--)
if (sig[i] != sig[i-1])
break;
// Do not remove non-const sign bit
if (sig[i].wire)
++i;
return sig.extract(0, i);
};
sigA = unextend(port(mul, \A));
sigB = unextend(port(mul, \B));
SigSpec O;
if (mul->type == $mul)
O = mul->getPort(\Y);
@ -36,25 +50,8 @@ code sigA sigB sigH
if (GetSize(O) <= 10)
reject;
sigA = port(mul, \A);
int i;
for (i = GetSize(sigA)-1; i > 0; i--)
if (sigA[i] != sigA[i-1])
break;
// Do not remove non-const sign bit
if (sigA[i].wire)
++i;
sigA.remove(i, GetSize(sigA)-i);
sigB = port(mul, \B);
for (i = GetSize(sigB)-1; i > 0; i--)
if (sigB[i] != sigB[i-1])
break;
// Do not remove non-const sign bit
if (sigB[i].wire)
++i;
sigB.remove(i, GetSize(sigB)-i);
// Only care about those bits that are used
int i;
for (i = 0; i < GetSize(O); i++) {
if (nusers(O[i]) <= 1)
break;
@ -105,7 +102,7 @@ code argQ ffB ffBholdmux ffBrstmux ffBholdpol ffBrstpol sigB clock clock_pol
}
endcode
code argD ffFJKG sigH sigO clock clock_pol
code argD ffFJKG sigH clock clock_pol
if (nusers(sigH) == 2 &&
(mul->type != \SB_MAC16 ||
(!param(mul, \TOP_8x8_MULT_REG).as_bool() && !param(mul, \BOT_8x8_MULT_REG).as_bool() && !param(mul, \PIPELINE_16x16_MULT_REG1).as_bool() && !param(mul, \PIPELINE_16x16_MULT_REG1).as_bool()))) {
@ -183,9 +180,11 @@ endcode
match add
if mul->type != \SB_MAC16 || (param(mul, \TOPOUTPUT_SELECT).as_int() == 3 && param(mul, \BOTOUTPUT_SELECT).as_int() == 3)
select add->type.in($add)
choice <IdString> AB {\A, \B}
select nusers(port(add, AB)) == 2
index <SigBit> port(add, AB)[0] === sigH[0]
filter GetSize(port(add, AB)) <= GetSize(sigH)
filter port(add, AB) == sigH.extract(0, GetSize(port(add, AB)))