public unsafe ReadOnlyProposal[] ForVectorized()
{
ProposalResult p = ProposalBuilder.GetSortedVectorizedInsurances();
var insuranceId = Vector256.Create(SearchedInsuranceId);
fixed(int *iip = p.InsuranceIds)
{
int i = 0;
int length = p.InsuranceIds.Length - Vector256 <int> .Count + 1;
int mask = 8;
while (mask == 8 && i < length)
{
mask = (int)Lzcnt.LeadingZeroCount(
(uint)Avx2.MoveMask(
Vector256.AsByte(
Avx2.CompareEqual(
Avx2.LoadVector256(iip + i),
insuranceId
)
).Reverse()
)
) >> 2;
i += Vector256 <int> .Count;
}
i -= Vector256 <int> .Count;
int initial = i + mask;
if (initial == p.InsuranceIds.Length)
{
return(Array.Empty <ReadOnlyProposal>());
}
mask = 0;
while (mask == 0 && i < length)
{
mask = (int)Lzcnt.LeadingZeroCount(
(uint)Avx2.MoveMask(
Vector256.AsByte(
Avx2.CompareEqual(
Avx2.LoadVector256(iip + i),
insuranceId
)
)
)
) >> 2;
i += Vector256 <int> .Count;
}
return(p.Proposals.AsSpan(initial, i - mask - initial).ToArray());
}
}
// removed, not testing loop speed
//[Benchmark]
public unsafe ReadOnlyProposal[] PositionalSortedVectorized()
{
ProposalResult[] proposals = ProposalBuilder.GetPositionalSortedVectorizedInsurances();
ProposalResult p = proposals[SearchedInsuranceId];
var minPremium = Vector256.Create(decimal.ToOACurrency(SearchedNetPremium));
fixed(long *npp = p.NetPremiums)
{
int i = 0;
int initial = 0;
for (; i < p.NetPremiums.Length - Vector256 <long> .Count + 1; i += Vector256 <long> .Count)
{
int mask = (int)Lzcnt.LeadingZeroCount(
(uint)Avx2.MoveMask(
Vector256.AsByte(
Avx2.CompareGreaterThan(
Avx2.LoadVector256(npp + i),
minPremium
)
).Reverse()
)
) >> 3;
if (mask != 8)
{
initial = i + mask;
break;
}
}
for (; i < p.NetPremiums.Length - Vector256 <long> .Count + 1; i += Vector256 <long> .Count)
{
int mask = (int)Lzcnt.LeadingZeroCount(
(uint)Avx2.MoveMask(
Vector256.AsByte(
Avx2.CompareGreaterThan(
Avx2.LoadVector256(npp + i),
minPremium
)
)
)
) >> 3;
if (mask != 0)
{
int length = i + Vector256 <long> .Count - mask - initial;
return(p.Proposals.AsSpan(initial, length).ToArray());
}
}
return(p.Proposals.AsSpan(initial).ToArray());
}
}
private static ProposalResult[] CreatePositionalSortedVectorizedProposal()
{
var grouped = CreateProposal()
.Select(p => new ReadOnlyProposal(p))
.GroupBy(p => p.InsuranceId)
.ToList();
ProposalResult[] result = new ProposalResult[grouped.Max(p => p.Key) + 1];
foreach (var p in grouped)
{
result[p.Key] = new ProposalResult(p.OrderByDescending(ps => ps.NetPremium).ToArray());
}
return(result);
}