weaselab/conflict-set
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More __builtin_clz to std::countl_zero

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Andrew Noyes
2024-01-30 21:12:41 -08:00
parent 220c5caf27
commit 2e6265b784
1 changed files with 3 additions and 2 deletions
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5
Internal.h
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@@ -2,6 +2,7 @@
#include "ConflictSet.h" #include "ConflictSet.h"
#include <bit>
#include <cassert> #include <cassert>
#include <cstdint> #include <cstdint>
#include <cstdlib> #include <cstdlib>
@@ -83,7 +84,7 @@ constexpr inline int align_up(uint32_t unaligned, uint32_t align) {
/// Returns the smallest power of two >= x /// Returns the smallest power of two >= x
[[maybe_unused]] constexpr inline uint32_t nextPowerOfTwo(uint32_t x) { [[maybe_unused]] constexpr inline uint32_t nextPowerOfTwo(uint32_t x) {
return x <= 1 ? 1 : 1 << (32 - __builtin_clz(x - 1)); return x <= 1 ? 1 : 1 << (32 - std::countl_zero(x - 1));
} }
struct Arena::ArenaImpl { struct Arena::ArenaImpl {
@@ -277,7 +278,7 @@ inline uint32_t Arbitrary::bounded(uint32_t s) {
if (s == 1) { if (s == 1) {
return 0; return 0;
} }
switch (32 - __builtin_clz(s - 1)) { switch (32 - std::countl_zero(s - 1)) {
case 1: case 1:
case 2: case 2:
case 3: case 3: