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use the new SIMD sorting wrappers

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Ahmet Inan 2024-03-05 09:41:04 +01:00
commit b038399c90
3 changed files with 21 additions and 40 deletions
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26
polar_list_decoder.hh
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@ -6,7 +6,6 @@ Copyright 2020 Ahmet Inan <inan@aicodix.de>
#pragma once
#include <algorithm>
#include "polar_helper.hh"
namespace CODE {
@ -53,32 +52,23 @@ struct PolarListNode<TYPE, 0>
static MAP rate1(PATH *metric, TYPE *message, MAP *maps, int *count, TYPE *hard, TYPE *soft)
{
TYPE sft = soft[1];
PATH fork[2*TYPE::SIZE];
SIMD<PATH, 2*TYPE::SIZE> fork;
for (int k = 0; k < TYPE::SIZE; ++k)
fork[2*k] = fork[2*k+1] = metric[k];
fork.v[2*k] = fork.v[2*k+1] = metric[k];
for (int k = 0; k < TYPE::SIZE; ++k)
if (sft.v[k] < 0)
fork[2*k] -= sft.v[k];
fork.v[2*k] -= sft.v[k];
else
fork[2*k+1] += sft.v[k];
int perm[2*TYPE::SIZE];
for (int k = 0; k < 2*TYPE::SIZE; ++k)
perm[k] = k;
#if 1
std::stable_sort(perm, perm+2*TYPE::SIZE, [fork](int a, int b){ return fork[a] < fork[b]; });
#else
std::partial_sort(perm, perm+TYPE::SIZE-1, perm+2*TYPE::SIZE, [fork](int a, int b){
return fork[a] < fork[b] ? true : fork[a] > fork[b] ? false : a < b;
});
#endif
fork.v[2*k+1] += sft.v[k];
auto perm = vorder(fork);
for (int k = 0; k < TYPE::SIZE; ++k)
metric[k] = fork[perm[k]];
metric[k] = fork.v[perm.v[k]];
MAP map;
for (int k = 0; k < TYPE::SIZE; ++k)
map.v[k] = perm[k] >> 1;
map.v[k] = perm.v[k] >> 1;
TYPE hrd;
for (int k = 0; k < TYPE::SIZE; ++k)
hrd.v[k] = 1 - 2 * (perm[k] & 1);
hrd.v[k] = 1 - 2 * (perm.v[k] & 1);
message[*count] = hrd;
maps[*count] = map;
++*count;