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bit_util: Bits without template arguments

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This commit is contained in:
MerryMage 2020-06-21 16:07:59 +01:00
parent 3202e4c539
commit f221912409
1 changed files with 12 additions and 4 deletions
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16
src/common/bit_util.h
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@ -29,11 +29,20 @@ constexpr T Ones(size_t count) {
return ~(static_cast<T>(~static_cast<T>(0)) << count);
}
/// Extract bits [begin_bit, end_bit] inclusive from value of type T.
template<typename T>
constexpr T Bits(const size_t begin_bit, const size_t end_bit, const T value) {
ASSERT_MSG(begin_bit <= end_bit, "invalid bit range (position of beginning bit cannot be greater than that of end bit)");
ASSERT_MSG(begin_bit < BitSize<T>(), "begin_bit must be smaller than size of T");
ASSERT_MSG(end_bit < BitSize<T>(), "end_bit must be smaller than size of T");
return (value >> begin_bit) & Ones<T>(end_bit - begin_bit + 1);
}
/// Extract bits [begin_bit, end_bit] inclusive from value of type T.
template<size_t begin_bit, size_t end_bit, typename T>
constexpr T Bits(const T value) {
static_assert(begin_bit <= end_bit,
"invalid bit range (position of beginning bit cannot be greater than that of end bit)");
static_assert(begin_bit <= end_bit, "invalid bit range (position of beginning bit cannot be greater than that of end bit)");
static_assert(begin_bit < BitSize<T>(), "begin_bit must be smaller than size of T");
static_assert(end_bit < BitSize<T>(), "end_bit must be smaller than size of T");
@ -43,8 +52,7 @@ constexpr T Bits(const T value) {
/// Create a mask of type T for bits [begin_bit, end_bit] inclusive.
template<size_t begin_bit, size_t end_bit, typename T>
constexpr T Mask() {
static_assert(begin_bit <= end_bit,
"invalid bit range (position of beginning bit cannot be greater than that of end bit)");
static_assert(begin_bit <= end_bit, "invalid bit range (position of beginning bit cannot be greater than that of end bit)");
static_assert(begin_bit < BitSize<T>(), "begin_bit must be smaller than size of T");
static_assert(end_bit < BitSize<T>(), "end_bit must be smaller than size of T");