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38 lines
685 B
C++
38 lines
685 B
C++
#pragma once
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#include "ppsspp_config.h"
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#include <cstdint>
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#if PPSSPP_PLATFORM(WINDOWS)
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#include "Common/CommonWindows.h"
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// Use this if you know the value is non-zero.
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inline uint32_t clz32_nonzero(uint32_t value) {
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DWORD index;
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BitScanReverse(&index, value);
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return 31 ^ (uint32_t)index;
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}
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inline uint32_t clz32(uint32_t value) {
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if (!value)
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return 32;
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DWORD index;
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BitScanReverse(&index, value);
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return 31 ^ (uint32_t)index;
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}
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#else
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// Use this if you know the value is non-zero.
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inline uint32_t clz32_nonzero(uint32_t value) {
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return __builtin_clz(value);
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}
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inline uint32_t clz32(uint32_t value) {
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if (!value)
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return 32;
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return __builtin_clz(value);
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}
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#endif
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