intrinsics Examples and Free Source Code

count number of unique values in a 128bit avx vector, or detecting if all elements are equal?...

c simd sse intrinsics avx

How to emulate _mm256_loadu_epi32 with gcc or clang?...

c++c intrinsics avx512

Why does does SSE set (_mm_set_ps) reverse the order of arguments...

c++c simd sse intrinsics

Difference between __builtin_addcll and _addcarry_u64...

c++clang intel intrinsics built-in

Can't use uint64_t with rdrand as it expects unsigned long long, but uint64_t is defined as unsi...

c++long-integer portability intrinsics rdrand

Linking error when building without CRT, memcpy and memset intrinsic functions...

c++memcpy intrinsics crt memset

Efficient overflow-immune arithmetic mean in C/C++...

c++c optimization compiler-optimization intrinsics

Manipulate vector register as float32x4_t C variable in ARM...

c assembly inline-assembly arm64 intrinsics

Why does Clang complain about alignment on SSE intrinsic unaligned loads...

clang sse intrinsics memory-alignment

Population count in AVX512...

simd intrinsics avx512 hammingweight

MSVC 2019 _fxrstor64 and _fxsave64 intrinsics availability...

c++visual-c++intrinsics

What are the names and meanings of the intrinsic vector element types, like epi64x or pi32?...

intel sse intrinsics sse2 mmx

Why does the pseudocode of _mm_insert_ps calculate %8?...

intrinsics sse4

Difference between _mm256_extractf32x4_ps and _mm256_extractf128_ps...

c++c intrinsics avx avx512

What is "MAX" referring to in the intel intrinsics documentation?...

c++c intrinsics avx avx512

What is the correct intrinsic sequence to do PSRLDQ to an XMM register while keeping the YMM part un...

c assembly x86 intrinsics avx

How to constexpr initialize intrinsic SSE/AVX register?...

c++sse constexpr intrinsics avx

What is the difference between these 128bit SIMD xor operations...

simd sse intrinsics sse2

Using Intrinsics to Extract And Shift Odd/Even Bits...

c++bit-manipulation intrinsics micro-optimization

What is the most efficient way to handle integer multiplication overflow with saturation with ARM Ne...

arm simd intrinsics neon saturation-arithmetic

ARMv7 NEON: Unpack 32 bit mask to 64 bit mask...

c++arm simd intrinsics neon

Organizing multiple implementations (for SIMD)...

c++simd intrinsics instruction-set

Discrepancy in result of Intrinsics vs Naive Vector reduction...

c++vector simd ieee-754 intrinsics

What is the equivalent of v4sf and __attribute__ in Visual Studio C++?...

c++gcc visual-c++sse intrinsics

Rust compiler not optimising lzcnt? (and similar functions)...

rust x86 bit-manipulation compiler-optimization intrinsics

How does the _mm256_shuffle_epi8 make sense in this Game of Life implementation?...

c++intrinsics avx conways-game-of-life

AVX2: BitScanReverse or CountLeadingZeros on 8 bit elements in AVX register...

c++simd intrinsics avx avx2

AVX2: CountTrailingZeros on 8 bit elements in AVX register...

c++simd intrinsics avx avx2

Using Half Precision Floating Point on x86 CPUs...

c++c x86 intrinsics half-precision-float

_umul128 on Windows 32 bits...

visual-c++x86 multiplication biginteger intrinsics