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initialize bit node links on first iteration

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This commit is contained in:
Ahmet Inan 2019-11-16 09:17:35 +01:00
commit 97dd7e2226
1 changed files with 10 additions and 4 deletions
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14
ldpc_decoder.hh
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@ -50,6 +50,7 @@ class LDPCDecoder
bool wds[BNL];
int16_t csh[VAR];
uint8_t cnt[PTY];
bool start;
static TYPE eor(TYPE a, TYPE b)
{
@ -100,6 +101,8 @@ class LDPCDecoder
}
TYPE inp = vqsub(tmp, bl[k]);
if (start)
inp = tmp;
TYPE mag = vqabs(inp);
@ -124,7 +127,8 @@ class LDPCDecoder
out = vclamp(out, -32, 31);
out = selfcorr(bl[k], out);
if (!start)
out = selfcorr(bl[k], out);
TYPE tmp = vqadd(inp, out);
@ -141,6 +145,8 @@ class LDPCDecoder
bl[k] = out;
var[offset] = tmp;
csh[offset] = shift;
} else if (start) {
bl[k] = vzero<TYPE>();
}
if (k) {
if (last_offset == offset) {
@ -239,8 +245,6 @@ public:
}
int operator()(int8_t *message, int8_t *parity, int trials = 25)
{
for (int i = 0; i < BNL; ++i)
bnl[i] = vzero<TYPE>();
for (int i = 0; i < VAR; ++i)
csh[i] = 0;
for (int i = 0; i < K/M; ++i)
@ -252,7 +256,9 @@ public:
for (int n = 0; n < D; ++n)
var[MSG+W*i+j].v[n] = parity[q*(W*n+j)+i];
while (--trials >= 0 && update());
start = true;
while (--trials >= 0 && update())
start = false;
for (int i = 0; i < VAR; ++i)
var[i] = rotate(var[i], -csh[i]);