diff options
Diffstat (limited to 'src/common/bit_util.h')
-rw-r--r-- | src/common/bit_util.h | 34 |
1 files changed, 17 insertions, 17 deletions
diff --git a/src/common/bit_util.h b/src/common/bit_util.h index 6f7d5a947..29f59a9a3 100644 --- a/src/common/bit_util.h +++ b/src/common/bit_util.h @@ -17,12 +17,12 @@ namespace Common { /// Gets the size of a specified type T in bits. template <typename T> -constexpr std::size_t BitSize() { +[[nodiscard]] constexpr std::size_t BitSize() { return sizeof(T) * CHAR_BIT; } #ifdef _MSC_VER -inline u32 CountLeadingZeroes32(u32 value) { +[[nodiscard]] inline u32 CountLeadingZeroes32(u32 value) { unsigned long leading_zero = 0; if (_BitScanReverse(&leading_zero, value) != 0) { @@ -32,7 +32,7 @@ inline u32 CountLeadingZeroes32(u32 value) { return 32; } -inline u32 CountLeadingZeroes64(u64 value) { +[[nodiscard]] inline u32 CountLeadingZeroes64(u64 value) { unsigned long leading_zero = 0; if (_BitScanReverse64(&leading_zero, value) != 0) { @@ -42,7 +42,7 @@ inline u32 CountLeadingZeroes64(u64 value) { return 64; } #else -inline u32 CountLeadingZeroes32(u32 value) { +[[nodiscard]] inline u32 CountLeadingZeroes32(u32 value) { if (value == 0) { return 32; } @@ -50,7 +50,7 @@ inline u32 CountLeadingZeroes32(u32 value) { return static_cast<u32>(__builtin_clz(value)); } -inline u32 CountLeadingZeroes64(u64 value) { +[[nodiscard]] inline u32 CountLeadingZeroes64(u64 value) { if (value == 0) { return 64; } @@ -60,7 +60,7 @@ inline u32 CountLeadingZeroes64(u64 value) { #endif #ifdef _MSC_VER -inline u32 CountTrailingZeroes32(u32 value) { +[[nodiscard]] inline u32 CountTrailingZeroes32(u32 value) { unsigned long trailing_zero = 0; if (_BitScanForward(&trailing_zero, value) != 0) { @@ -70,7 +70,7 @@ inline u32 CountTrailingZeroes32(u32 value) { return 32; } -inline u32 CountTrailingZeroes64(u64 value) { +[[nodiscard]] inline u32 CountTrailingZeroes64(u64 value) { unsigned long trailing_zero = 0; if (_BitScanForward64(&trailing_zero, value) != 0) { @@ -80,7 +80,7 @@ inline u32 CountTrailingZeroes64(u64 value) { return 64; } #else -inline u32 CountTrailingZeroes32(u32 value) { +[[nodiscard]] inline u32 CountTrailingZeroes32(u32 value) { if (value == 0) { return 32; } @@ -88,7 +88,7 @@ inline u32 CountTrailingZeroes32(u32 value) { return static_cast<u32>(__builtin_ctz(value)); } -inline u32 CountTrailingZeroes64(u64 value) { +[[nodiscard]] inline u32 CountTrailingZeroes64(u64 value) { if (value == 0) { return 64; } @@ -99,13 +99,13 @@ inline u32 CountTrailingZeroes64(u64 value) { #ifdef _MSC_VER -inline u32 MostSignificantBit32(const u32 value) { +[[nodiscard]] inline u32 MostSignificantBit32(const u32 value) { unsigned long result; _BitScanReverse(&result, value); return static_cast<u32>(result); } -inline u32 MostSignificantBit64(const u64 value) { +[[nodiscard]] inline u32 MostSignificantBit64(const u64 value) { unsigned long result; _BitScanReverse64(&result, value); return static_cast<u32>(result); @@ -113,30 +113,30 @@ inline u32 MostSignificantBit64(const u64 value) { #else -inline u32 MostSignificantBit32(const u32 value) { +[[nodiscard]] inline u32 MostSignificantBit32(const u32 value) { return 31U - static_cast<u32>(__builtin_clz(value)); } -inline u32 MostSignificantBit64(const u64 value) { +[[nodiscard]] inline u32 MostSignificantBit64(const u64 value) { return 63U - static_cast<u32>(__builtin_clzll(value)); } #endif -inline u32 Log2Floor32(const u32 value) { +[[nodiscard]] inline u32 Log2Floor32(const u32 value) { return MostSignificantBit32(value); } -inline u32 Log2Ceil32(const u32 value) { +[[nodiscard]] inline u32 Log2Ceil32(const u32 value) { const u32 log2_f = Log2Floor32(value); return log2_f + ((value ^ (1U << log2_f)) != 0U); } -inline u32 Log2Floor64(const u64 value) { +[[nodiscard]] inline u32 Log2Floor64(const u64 value) { return MostSignificantBit64(value); } -inline u32 Log2Ceil64(const u64 value) { +[[nodiscard]] inline u32 Log2Ceil64(const u64 value) { const u64 log2_f = static_cast<u64>(Log2Floor64(value)); return static_cast<u32>(log2_f + ((value ^ (1ULL << log2_f)) != 0ULL)); } |