Abstract
The focus of this chapter is AVX integer programming using 128-bit wide SIMD operands. The first section examines several concise source code examples that illustrate packed integer arithmetic including addition, subtraction, and multiplication. This section also explains AVX bitwise logical operations and shifts. The second section contains two source code examples that demonstrate elementary SIMD calculations using integer arrays. Integer arrays are frequently utilized to maintain the pixels of a digital image. As you’ll soon see, AVX is ideally suited for many types of image processing algorithms.
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Notes
- 1.
Template class AlignedArray<> uses static function OS::AlignedMalloc() (see OS.h) to dynamically allocate a memory block that is aligned on a specific boundary. Class OS contains operating system helper functions that work on both Windows and Linux.
- 2.
In this example, Loop1 is partially unrolled.
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Kusswurm, D. (2023). AVX Programming – Packed Integers. In: Modern X86 Assembly Language Programming. Apress, Berkeley, CA. https://doi.org/10.1007/978-1-4842-9603-5_8
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DOI: https://doi.org/10.1007/978-1-4842-9603-5_8
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