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ldpctool: Remove VLAs from MinSumAlgorithm<float>

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Replace variable length arrays in the float specialization of
MinSumAlgorithm::finalp() with std::vector storage.

This removes reliance on compiler VLA extensions and keeps the
temporary buffers managed by standard C++ containers.

Signed-off-by: Robin Getz <rgetz503@gmail.com>
This commit is contained in:
Robin Getz
2026-08-01 13:37:39 -04:00
parent 1a85082dac
commit a1391d52a2
1 changed files with 7 additions and 5 deletions
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plugins/channelrx/demoddatv/ldpctool/generic.h
+7 -5
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@@ -121,18 +121,20 @@ struct MinSumAlgorithm<float, UPDATE>
static void finalp(float *links, int cnt)
{
int mask = 0x80000000;
float mags[cnt], mins[cnt];
std::vector<float> mags(cnt), mins(cnt);
std::vector<int> signs(cnt);
for (int i = 0; i < cnt; ++i)
mags[i] = std::abs(links[i]);
CODE::exclusive_reduce(mags, mins, cnt, min);
int signs[cnt];
CODE::exclusive_reduce(reinterpret_cast<int *>(links), signs, cnt, xor_);
CODE::exclusive_reduce(mags.data(), mins.data(), cnt, min);
CODE::exclusive_reduce(reinterpret_cast<int *>(links), signs.data(), cnt, xor_);
for (int i = 0; i < cnt; ++i)
signs[i] &= mask;
for (int i = 0; i < cnt; ++i)
reinterpret_cast<int *>(links)[i] = signs[i] | reinterpret_cast<int *>(mins)[i];
reinterpret_cast<int *>(links)[i] = signs[i] | reinterpret_cast<int *>(mins.data())[i];
}
static float sign(float a, float b)
{