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Support median block size > 4 GB

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add a 128/64 division routine so we can use a > 32 bit median block
size in calculations
This commit is contained in:
moneromooo-monero 2019-10-07 19:24:57 +00:00
parent b60cf6a938
commit be82c40703
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6 changed files with 174 additions and 14 deletions
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7
src/cryptonote_basic/cryptonote_basic_impl.cpp
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@ -110,9 +110,6 @@ namespace cryptonote {
return false;
}
assert(median_weight < std::numeric_limits<uint32_t>::max());
assert(current_block_weight < std::numeric_limits<uint32_t>::max());
uint64_t product_hi;
// BUGFIX: 32-bit saturation bug (e.g. ARM7), the result was being
// treated as 32-bit by default.
@ -122,8 +119,8 @@ namespace cryptonote {
uint64_t reward_hi;
uint64_t reward_lo;
div128_32(product_hi, product_lo, static_cast<uint32_t>(median_weight), &reward_hi, &reward_lo);
div128_32(reward_hi, reward_lo, static_cast<uint32_t>(median_weight), &reward_hi, &reward_lo);
div128_64(product_hi, product_lo, median_weight, &reward_hi, &reward_lo, NULL, NULL);
div128_64(reward_hi, reward_lo, median_weight, &reward_hi, &reward_lo, NULL, NULL);
assert(0 == reward_hi);
assert(reward_lo < base_reward);