39 lines
879 B
C++
39 lines
879 B
C++
#pragma once
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#include <cstdint>
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#include <assert.h>
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template <typename... Args>
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void unused(Args&&...) {}
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#define __unused(...) unused(__VA_ARGS__)
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constexpr bool ispow2(uint64_t value) {
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return value && !(value & (value - 1));
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}
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constexpr unsigned log2ceil(uint32_t value) {
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return 32 - __builtin_clz(value - 1);
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}
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inline uint64_t align_size(uint64_t size, uint64_t alignment) {
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assert(0 == (alignment & (alignment - 1)));
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return (size + alignment - 1) & ~(alignment - 1);
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}
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// 64-bit sign extension
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inline uint64_t signExt(uint64_t w, uint64_t bit, uint64_t mask) {
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if (w >> (bit - 1))
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w |= ~mask;
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return w;
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}
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// 128-bit sign extension
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inline __uint128_t signExt128(__uint128_t w, uint32_t bit, __uint128_t mask) {
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if (w >> (bit - 1))
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w |= ~mask;
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return w;
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}
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// return file extension
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const char* fileExtension(const char* filepath); |