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Take another swing at popcount.

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This commit is contained in:
Thomas Harte 2024-03-07 14:28:31 -05:00
parent 2a36d0fcbc
commit fa8fcd2218
1 changed files with 4 additions and 4 deletions
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8
InstructionSets/ARM/Executor.hpp
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@ -367,10 +367,10 @@ struct Executor {
// the base. // the base.
// TODO: use std::popcount when adopting C++20. // TODO: use std::popcount when adopting C++20.
uint32_t total = ((list & 0xaaa) >> 1) + (list & 0x555); uint32_t total = ((list & 0xaaaa) >> 1) + (list & 0x5555);
total = ((total & 0xccc) >> 2) + (total & 0x333); total = ((total & 0xcccc) >> 2) + (total & 0x3333);
total = ((total & 0x0f0) >> 4) + (total & 0xf0f); total = ((total & 0xf0f0) >> 4) + (total & 0x0f0f);
total = ((total & 0xff0) >> 8) + (total & 0x00f); total = ((total & 0xff00) >> 8) + (total & 0x00ff);
uint32_t final_address; uint32_t final_address;
if constexpr (!flags.add_offset()) { if constexpr (!flags.add_offset()) {