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@fingera fingera commented May 11, 2022

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uint64_t mask;
if (diff >= 0) {
mask = ~UINT64_C(0) >> (64 - (diff + 1));
mask = (static_cast<unsigned>(diff) < (reg_size - 1)) ? mask : reg_mask;
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diff=31 reg_size=32 mask=reg_mask=0xFFFFFFFF
diff=63 reg_size=64 mask=reg_mask

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