cpp / expert
Snippet
Vectorized Buffer Alignment with Explicit Padding
Enforcing memory alignment at the hardware level to enable SIMD (Single Instruction, Multiple Data) optimizations and prevent unaligned access penalties.
snippet.cpp
cpp
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struct alignas(32) SIMDBlock {float data[8];};void processBlock(SIMDBlock& block) {for(int i = 0; i < 8; ++i) {block.data[i] *= 1.5f;}}static_assert(sizeof(SIMDBlock) == 32, "Alignment mismatch");
Breakdown
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struct alignas(32) SIMDBlock
Directs the compiler to align the structure on a 32-byte boundary (AVX requirement).
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float data[8];
An array of 8 floats, perfectly fitting into a 256-bit SIMD register.
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static_assert(sizeof(SIMDBlock) == 32
Compile-time validation that the structure size matches the alignment.