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common/bit_util: Make CountLeading/CountTrailing functions have the same return types 

Makes the return type consistently uniform (like the intrinsics we're
wrapping). This also conveniently silences a truncation warning within
the kernel multi_level_queue.
master
Lioncash 2019-04-05 15:28:08 +07:00
parent 66be5150d6
commit 33db37e669
1 changed files with 8 additions and 8 deletions
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16
src/common/bit_util.h
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@ -32,7 +32,7 @@ inline u32 CountLeadingZeroes32(u32 value) {
return 32; return 32;
} }
inline u64 CountLeadingZeroes64(u64 value) { inline u32 CountLeadingZeroes64(u64 value) {
unsigned long leading_zero = 0; unsigned long leading_zero = 0;
if (_BitScanReverse64(&leading_zero, value) != 0) { if (_BitScanReverse64(&leading_zero, value) != 0) {
@ -47,15 +47,15 @@ inline u32 CountLeadingZeroes32(u32 value) {
return 32; return 32;
} }
return __builtin_clz(value); return static_cast<u32>(__builtin_clz(value));
} }
inline u64 CountLeadingZeroes64(u64 value) { inline u32 CountLeadingZeroes64(u64 value) {
if (value == 0) { if (value == 0) {
return 64; return 64;
} }
return __builtin_clzll(value); return static_cast<u32>(__builtin_clzll(value));
} }
#endif #endif
@ -70,7 +70,7 @@ inline u32 CountTrailingZeroes32(u32 value) {
return 32; return 32;
} }
inline u64 CountTrailingZeroes64(u64 value) { inline u32 CountTrailingZeroes64(u64 value) {
unsigned long trailing_zero = 0; unsigned long trailing_zero = 0;
if (_BitScanForward64(&trailing_zero, value) != 0) { if (_BitScanForward64(&trailing_zero, value) != 0) {
@ -85,15 +85,15 @@ inline u32 CountTrailingZeroes32(u32 value) {
return 32; return 32;
} }
return __builtin_ctz(value); return static_cast<u32>(__builtin_ctz(value));
} }
inline u64 CountTrailingZeroes64(u64 value) { inline u32 CountTrailingZeroes64(u64 value) {
if (value == 0) { if (value == 0) {
return 64; return 64;
} }
return __builtin_ctzll(value); return static_cast<u32>(__builtin_ctzll(value));
} }
#endif #endif