In addition to their ongoing AMDGPU LLVM compiler back-end work for upcoming GFX1250 and recently the GFX13 target for their graphics IP, today AMD compiler engineers introduced a new “GFX1170” target to the LLVM codebase that is also called RDNA 4m.
GFX1170 is presumably some re-refresh of RDNA3. The AMDGPU GFX1150 series was for the RDNA3.5 / RDNA3 refresh graphics found with the likes of Strix Point and Strix Halo. Plus other sub-variants in the GFX1150 series. Now coming as a surprise is GFX1170.
With being introduced as GFX1170 rather than another GFX115x target or even GFX1160 leads to perhaps some more significant changes coming to this refresh in the RDNA 3 family.
The GFX1170 enablement patch for LLVM confirms that GFX1170 is for an APU/SoC target. Interestingly it marks GFX170 / GFX 11.7 as “RDNA 4m”… RDNA4 was associated with the GFX12 series where RDNA3 is GFX11. Calling GFX 11.7 as RDNA 4m is a bit strange. Presumably a marketing decision.
Over the GFX115x targets, GFX1170 adds the SALUFloatInsts and DPPSrc1SGPR features. But it doesn’t have all of the other GFX12 ISA features found with the complete RDNA4 GPUs.
This commit introduces that initial AMD GFX1170 target to LLVM Git. It will be interesting to see what comes of this “RDNA 4m” graphics for APUs/SoCs.
