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common/bit_field: Silence sign-conversion warnings

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We can just use numeric_limits instead of relying on wraparound behavior
here.
This commit is contained in:
Lioncash 2019-11-13 14:41:24 -05:00
parent cc9e682021
commit 14581e4a59
1 changed files with 3 additions and 2 deletions
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5
src/common/bit_field.h
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@ -135,7 +135,8 @@ public:
/// Constants to allow limited introspection of fields if needed /// Constants to allow limited introspection of fields if needed
static constexpr std::size_t position = Position; static constexpr std::size_t position = Position;
static constexpr std::size_t bits = Bits; static constexpr std::size_t bits = Bits;
static constexpr StorageType mask = (((StorageType)~0) >> (8 * sizeof(T) - bits)) << position; static constexpr StorageType mask = StorageType(
(std::numeric_limits<StorageType>::max() >> (8 * sizeof(T) - bits)) << position);
/** /**
* Formats a value by masking and shifting it according to the field parameters. A value * Formats a value by masking and shifting it according to the field parameters. A value
@ -143,7 +144,7 @@ public:
* the results together. * the results together.
*/ */
static constexpr FORCE_INLINE StorageType FormatValue(const T& value) { static constexpr FORCE_INLINE StorageType FormatValue(const T& value) {
return ((StorageType)value << position) & mask; return (static_cast<StorageType>(value) << position) & mask;
} }
/** /**