mirror of https://github.com/bsnes-emu/bsnes.git
40 lines
1.0 KiB
C++
40 lines
1.0 KiB
C++
#pragma once
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namespace nall {
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template<typename T, enable_if_t<is_unsigned<T>::value>> alwaysinline auto upper(T value) -> T {
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return value >> sizeof(T) * 4;
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}
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template<typename T, enable_if_t<is_unsigned<T>::value>> alwaysinline auto lower(T value) -> T {
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static const T Mask = T(0) - 1 >> sizeof(T) * 4;
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return value & Mask;
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}
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alwaysinline auto square(uintmax value) -> uintmax {
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return value * value;
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}
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template<typename T, typename U> alwaysinline auto rol(const T& lhs, const U& rhs, enable_if_t<is_unsigned<T>::value>* = 0) -> T {
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return lhs << rhs | lhs >> (sizeof(T) * 8 - rhs);
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}
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template<typename T, typename U> alwaysinline auto ror(const T& lhs, const U& rhs, enable_if_t<is_unsigned<T>::value>* = 0) -> T {
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return lhs >> rhs | lhs << (sizeof(T) * 8 - rhs);
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}
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#if INTMAX_BITS >= 128
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inline auto operator"" _u128(const char* s) -> uint128_t {
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uint128_t p = 0;
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while(*s) {
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auto c = *s++;
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if(c == '\'') continue;
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if(c < '0' || c > '9') break;
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p = (p << 3) + (p << 1) + (c - '0');
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}
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return p;
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}
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#endif
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}
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