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-rw-r--r--src/common/bit_util.h34
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));
}