SWAR
A software optimization technique that processes multiple narrow data elements in parallel within a single register, achieving SIMD-like effects through masks and bitwise operations. It is commonly used on MCUs without hardware SIMD support.
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SWAR (SIMD Within A Register) is a classic technique for processing multiple narrower data items in parallel within a single 32-bit register through bit operations on MCUs that lack SIMD/DSP instructions.
The SWAR approach typically brings a 2–4x speedup on 8-bit or 32-bit MCUs.
The SWAR approach is especially efficient in binarization and morphological operations, because each pixel requires only 1 bit, so a single 32-bit word can process 32 pixels in parallel.
All Facts (3)
SWAR (SIMD Within A Register) is a classic technique for processing multiple narrower data items in parallel within a single 32-bit register through bit operations on MCUs that lack SIMD/DSP instructions.
50%UnverifiedThe SWAR approach typically brings a 2–4x speedup on 8-bit or 32-bit MCUs.
50%UnverifiedThe SWAR approach is especially efficient in binarization and morphological operations, because each pixel requires only 1 bit, so a single 32-bit word can process 32 pixels in parallel.
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