AMD released the RDNA3 Instruction Set Architecture (ISA) Reference Guide
AMD released the Radeon RX 7900 XTX and Radeon RX 7900 XT graphics cards based on the new-generation RDNA 3 architecture GPU on November 3, 2022, and related products went on sale on December 13 last year. Nearly a month after its release, AMD released the RDNA3 Instruction Set Architecture (ISA) Reference Guide, which contains 606 pages of instruction content about the RDNA 3 architecture.
Sapphire Radeon RX 7900 NITRO+, Source: VideoCardz
This document is intended for developers who wish to enable or modify specific instructions for the RDNA3 architecture, provides knowledge about the RDNA 3 shader code execution model, and memory hierarchy, and lists all available instructions, helpful for optimization or compiler-level tuning. Phoronix pointed out that there are two main purposes of this document, one is to specify the language structure and behavior, and the other is to provide references for instruction operations.
So far, only one product based on the RDNA 3 architecture is on sale, the Radeon RX 7900 XTX and Radeon RX 7900 XT graphics cards with Navi 31. AMD recently released the Radeon RX 7000 series of mobile graphics cards, using another chip based on the RDNA 3 architecture, Navi 33, and related products should be available next month.
It is rumored that AMD has three GPUs based on the RDNA 3 architecture, and the rest is Navi 32, which uses the same MCM design as Navi 31. The video memory interface is 256 bits, the Infinity Cache is 64MB, it has one GCD and four MCDs, and the corresponding number of stream processors is 3840. In addition, AMD recently released the Ryzen 7040 series APU code-named “Phoenix Point” for mobile platforms, and its integrated graphic part also uses the RDNA 3 architecture, and there will be a corresponding desktop version in the future.
