Revision as of 12:24, 19 November 2018

Advanced Vector Extensions 512 (AVX-512) is collective name for a number of 512-bit SIMD x86 instruction set extensions. The extensions were formally introduced by Intel in July 2013 with first general-purpose microprocessors implementing the extensions introduced in July 2017.

Overview

AVX-512 is a set of 512-bit SIMD extensions that allow programs to pack sixteen single-precision eight double-precision floating-point numbers, or eight 64-bit or sixteen 32-bit integers within 512-bit vectors. The extension provides double the computation capabilities of that of AVX/AV2.

• AVX512F - AVX-512 Foundation is base of the 512-bit SIMD instruction extensions which is a comprehensive list of features for most HPC and enterprise applications. AVX-512 Foundation is the natural extensions to AVX/AVX2 which is extended using the EVEX prefix which builds on the existing VEX prefix. Any processor that implements any portion of the AVX-512 extensions MUST implement AVX512F.

• AVX512CD - AVX-512 Conflict Detection Instructions offer additional vectorization of loops with possible address conflict.

• AVX512DQ - AVX-512 Doubleword and Quadword Instructions add new 32-bit and 64-bit AVX-512 instructions (conversion, transcendental support, etc..).

• AVX512PF - AVX-512 Prefetch Instructions add new prefetch instructions for gather/scatter and PREFETCHWT1 .

• AVX512ER - AVX-512 Exponential and Reciprocal Instructions (ERI) offer 28-bit precision RCP, RSQRT and EXP transcendentals for various scientific applications.

• AVX512VL - AVX-512 Vector Length Instructions add vector length orthogonality, allowing most AVX-512 operations to also operate on XMM (128-bit SSE) registers and YMM (256-bit AVX) registers

• AVX512BW - AVX-512 Byte and Word Instructions add support for for 8-bit and 16-bit integer operations.

• AVX512IFMA - AVX-512 Integer Fused Multiply-Add Instructions add support for fused multiply add of integers using 52-bit precision.

• AVX512VBMI - AVX-512 Vector Bit Manipulation, Version 1 add additional vector byte permutation instructions.

• AVX512VBMI2 - AVX-512 Vector Bit Manipulation, Version 2 add additional vector byte permutation instructions.

• AVX512VAES - AVX-512 Vector AES Instructions add vector AES operations

• AVX512BITALG - AVX-512 Bit Algorithms add bit algorithms operations

• AVX5124FMAPS - AVX-512 Fused Multiply Accumulation Packed Single precision Instructions add vector instructions for deep learning on floating-point single precision

• AVX512VPCLMULQDQ - AVX-512 Vector Carry-less Multiply add vector carry-less multiply operations

• AVX512GFNI - AVX-512 Galois Field New Instructions add Galois Field transformations instructions

• AVX512VNNI - AVX-512 Vector Neural Network Instructions add vector instructions for deep learning

• AVX5124VNNIW - AVX-512 Vector Neural Network Instructions Word Variable Precision Instructions add vector instructions for deep learning on enhanced word variable precision

• AVX512VPOPCNTDQ - AVX-512 Vector Population Count Doubleword and Quadword Instructions add double and quad word population count instructions.

Note that,

• Formerly, the term AVX3.1 referred to F + CD + ER + PF.
• Formerly, the term AVX3.2 referred to F + CD + BW + DQ + VL.

Detection

Implementation

Documents

• Intel® Advanced Vector Extensions 2015/2016; GNU Tools Cauldron 2014; Presented by Kirill Yukhin of Intel, July 2014