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gem5
v21.0.1.0
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gem5
v21.0.1.0
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#include <cassert>#include <cstddef>#include <cstdint>#include <type_traits>Go to the source code of this file.
Macros | |
| #define | __has_builtin(foo) 0 |
Functions | |
| constexpr uint64_t | mask (unsigned nbits) |
| Generate a 64-bit mask of 'nbits' 1s, right justified. More... | |
| template<class T > | |
| constexpr T | bits (T val, unsigned first, unsigned last) |
| Extract the bitfield from position 'first' to 'last' (inclusive) from 'val' and right justify it. More... | |
| template<class T > | |
| constexpr T | bits (T val, unsigned bit) |
| Extract the bit from this position from 'val' and right justify it. More... | |
| template<class T > | |
| constexpr T | mbits (T val, unsigned first, unsigned last) |
| Mask off the given bits in place like bits() but without shifting. More... | |
| constexpr uint64_t | mask (unsigned first, unsigned last) |
| template<int N> | |
| constexpr uint64_t | sext (uint64_t val) |
| Sign-extend an N-bit value to 64 bits. More... | |
| template<class T , class B > | |
| constexpr T | insertBits (T val, unsigned first, unsigned last, B bit_val) |
| Returns val with bits first to last set to the LSBs of bit_val. More... | |
| template<class T , class B > | |
| constexpr T | insertBits (T val, unsigned bit, B bit_val) |
| Overloaded for access to only one bit in value. More... | |
| template<class T , class B > | |
| constexpr void | replaceBits (T &val, unsigned first, unsigned last, B bit_val) |
| A convenience function to replace bits first to last of val with bit_val in place. More... | |
| template<class T , class B > | |
| constexpr void | replaceBits (T &val, unsigned bit, B bit_val) |
| Overloaded function to allow to access only 1 bit. More... | |
| template<class T > | |
| std::enable_if_t< std::is_integral< T >::value &&sizeof(T) !=1, T > | reverseBits (T val, size_t size=sizeof(T)) |
| Takes a value and returns the bit reversed version. More... | |
| template<class T > | |
| std::enable_if_t< std::is_integral< T >::value &&sizeof(T)==1, T > | reverseBits (T val, size_t size=sizeof(T)) |
| constexpr int | findMsbSet (uint64_t val) |
| Returns the bit position of the MSB that is set in the input. More... | |
| constexpr int | findLsbSet (uint64_t val) |
| Returns the bit position of the LSB that is set in the input. More... | |
| constexpr int | popCount (uint64_t val) |
| Returns the number of set ones in the provided value. More... | |
| constexpr uint64_t | alignToPowerOfTwo (uint64_t val) |
| Align to the next highest power of two. More... | |
| constexpr int | ctz32 (uint32_t value) |
| Count trailing zeros in a 32-bit value. More... | |
| constexpr int | ctz64 (uint64_t value) |
| Count trailing zeros in a 64-bit value. More... | |
Variables | |
| const uint8_t | reverseBitsLookUpTable [] |
| Lookup table used for High Speed bit reversing. More... | |
| #define __has_builtin | ( | foo | ) | 0 |
| std::enable_if_t<std::is_integral<T>::value && sizeof(T) == 1, T> reverseBits | ( | T | val, |
| size_t | size = sizeof(T) |
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| ) |
Definition at line 228 of file bitfield.hh.
References reverseBitsLookUpTable, and X86ISA::val.
| const uint8_t reverseBitsLookUpTable[] |
Lookup table used for High Speed bit reversing.
Definition at line 41 of file bitfield.cc.
Referenced by reverseBits().