It seems there is no intrinsic for bitwise NOT/complement in AVX2. Did I miss it, or are we supposed to do something like _mm256_xor_si256(a, _mm256_set1_epi64x(-1LL)) ? If the latter, is it optimal? Is there no vector NOT instruction in assembly either?
Bitwise NOT/complement in AVX2
3.7k Views Asked by Serge Rogatch At
1
There are 1 best solutions below
Related Questions in C++
- C++ using std::vector across boundaries
- Linked list without struct
- Connecting Signal QML to C++ (Qt5)
- how to get the reference of struct soap inherited in C++ Proxy/Service class
- Why we can't assign value to pointer
- Conversion of objects in c++
- shared_ptr: "is not a type" error
- C++ template using pointer and non pointer arguments in a QVector
- C++ SFML 2.2 vectors
- Lifetime of temporary objects
- I want to be able to use 4 different variables in a select statement in c ++
- segmentation fault: 11, extracting data in vector
- How to catch delay-import dll errors (missing dll or symbol) in MinGW(-w64)?
- How can I print all the values in this linked list inside a hash table?
- Configured TTL for A record(s) backing CNAME records
Related Questions in BIT-MANIPULATION
- Understanding ~ Operator
- Getting four bits from the right only in a byte using bit shift operations
- How this bitshift to build the number works?
- A + B without arithmetic operators, Python vs C++
- Faster way of adding negative signed to unsigned
- Setting a bit in hexadecimal number
- reverse a number's bits
- php synatax $b = (6 << 1); clarification
- Turning off a single GPIO pin on ARM9 (LPC3141)
- Toggle a given range of bits of an unsigned int in C
- javascript shifting >32-bit to get 64-bit Int
- Setting bits in a bit stream
- Efficient comparison of small integer vectors
- Perform integer division using multiplication
- Bitwise (Bitshift) operations on 64-bit integers in C++
Related Questions in VECTORIZATION
- OpenMP SIMD on Power8
- Improve Speed of Piecewise Function in MATLAB
- Vectorization using accumarray
- Store, modify and retrieve strings with GCC Vector Extensions?
- replace zero values with previous non-zero values
- Compare two 16-byte values for equality using up to SSE 4.2?
- Matlab reshape back into original image
- R - Vectorized implementation of ternary function
- Fast celllarray by matrix multiplication
- How to check if any words in a list of phrases are contained in a list in R?
- Factorial of a matrix elementwise with Numpy
- how to calculate a 2D array with numpy mask
- Return element from vector A or B based on value of Vector C or D
- trying to vectorize this operation in R and I don't see why this is wrong
- Interpolation for missing values
Related Questions in X86-64
- How should the byte sequence 0x40 0x55 be interpreted by an x86-64 emulator?
- os kern error : "ld: symbol(s) not found for architecture x86_64"
- Can feenableexcept hurt a program performance?
- MASM console window creation troubles (maybe my stack frame??)
- Bomb lab phase 5
- Displaying symbolic constants in Assembly Language
- puts implementation in assembly with nasm x86-64
- Can I use the mid bits on pointers (on 64-bit machines) to implement things (like tagged pointers)?
- Segmentation fault when exploit string overwrites the return pointer with the starting address on stack
- Reserve bytes in stack: x86 Assembly (64 bit)
- Assembly: why some x86 opcodes are invalid in x64?
- Clang runtime fault when throwing aligned type. Compiler bug?
- What fpu_xrstor_checking does? extra commentary?
- NASM: copying a pointer from a register to a buffer in .data
- Using an x64 assembler to reference memory
Related Questions in AVX2
- CMake: Enable '/arch:AVX2' in Visual Studio 2013 projects
- For some reason serial code runs faster than SIMD code
- SSE - AVX conversion from double to char
- Is it really efficient to use Karatsuba algorithm in 64-bit x 64-bit multiplication?
- How can I convert a vector of float to short int using avx instructions?
- Can I use the AVX FMA units to do bit-exact 52 bit integer multiplications?
- How to force pointer returned by new operator to be 32-byte aligned
- Speeding up gather
- Why doesn't MSVC's auto-vectorization use AVX2?
- Optimal SIMD algorithm to rotate or transpose an array
- AVX2 rotate vector
- _mm256_loadu2_m128i intrinsic not available under g++?
- Efficient (on Ryzen) way to extract the odd elements of a __m256 into a __m128?
- Having 4 bits, how to produce a mask for AVX register?
- SIMD -> uint16_t array to float array work on float then back to uint16_t
Trending Questions
- UIImageView Frame Doesn't Reflect Constraints
- Is it possible to use adb commands to click on a view by finding its ID?
- How to create a new web character symbol recognizable by html/javascript?
- Why isn't my CSS3 animation smooth in Google Chrome (but very smooth on other browsers)?
- Heap Gives Page Fault
- Connect ffmpeg to Visual Studio 2008
- Both Object- and ValueAnimator jumps when Duration is set above API LvL 24
- How to avoid default initialization of objects in std::vector?
- second argument of the command line arguments in a format other than char** argv or char* argv[]
- How to improve efficiency of algorithm which generates next lexicographic permutation?
- Navigating to the another actvity app getting crash in android
- How to read the particular message format in android and store in sqlite database?
- Resetting inventory status after order is cancelled
- Efficiently compute powers of X in SSE/AVX
- Insert into an external database using ajax and php : POST 500 (Internal Server Error)
Popular Questions
- How do I undo the most recent local commits in Git?
- How can I remove a specific item from an array in JavaScript?
- How do I delete a Git branch locally and remotely?
- Find all files containing a specific text (string) on Linux?
- How do I revert a Git repository to a previous commit?
- How do I create an HTML button that acts like a link?
- How do I check out a remote Git branch?
- How do I force "git pull" to overwrite local files?
- How do I list all files of a directory?
- How to check whether a string contains a substring in JavaScript?
- How do I redirect to another webpage?
- How can I iterate over rows in a Pandas DataFrame?
- How do I convert a String to an int in Java?
- Does Python have a string 'contains' substring method?
- How do I check if a string contains a specific word?
Yes, the only SIMD bitwise NOT is PXOR/XORPS with all-ones, in MMX, SSE*, and AVX1/2.
AVX512F can avoid the need for a separate vector constant using
vpternlogd same,same,same, with the immediate0x55. (See my answer on the duplicate for more details about it vs.vpxord: Is NOT missing from SSE, AVX?)Ideally you can arrange your algorithm to avoid actually needing to NOT something. For example, using
PANDNinstead ofPAND. Or invert later as part of something else. But if you do end up needing to invert, that's how.The all-ones constant can be generated with
vpcmpeqd same,same,same. With intrinsics, let the compiler do this for you by writing_mm256_set1_epi32(-1). (Element size is obviously irrelevant forset1(-1), use whatever makes semantic sense for your algorithm.)