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Workaround miscompiles with AMD OpenCL #45

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Merged
ifdefelse merged 1 commit into from
Jun 10, 2019
Merged

Workaround miscompiles with AMD OpenCL #45

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4 changes: 3 additions & 1 deletion libethash-cl/CLMiner_kernel.cl
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Original file line number Diff line number Diff line change
Expand Up @@ -198,7 +198,9 @@ __kernel void ethash_search(
// initialize mix for all lanes
fill_mix(hash_seed, lane_id, mix);

#pragma unroll 1
// Apparently, no unrolling ("#pragma unroll 1") often results in
// miscompiles with AMD OpenCL, so use at least 2
#pragma unroll 2
for (uint32_t l = 0; l < PROGPOW_CNT_DAG; l++)
progPowLoop(l, mix, g_dag, c_dag, share[0].uint64s, hack_false);

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