
Whatever the AMD GFX1250 series ends up being for, it's quite exciting in doubling the number of SGPRs - scalar general-purpose registers, new instructions for better memory efficiency, and other improvements.
The newest indicator of GFX1250/GFX1251 being for enterprise is seeing the LLVM Git activity yesterday with those new AMD GPU targets both being flagged for "FEATURE_SRAMECC". This feature flag is for indicating static RAM ECC. The only other AMD GPUs with SRAM ECC are the GFX906 / GFX908 / GFX90A / GFX942 / GFX950 parts... the AMD Instinct hardware.
So with this commit now marking GFX1250/GFX1251 flagging SRAM ECC support, it reinforces the thesis that GFX1250/GFX1251 is indeed for upcoming Instinct hardware.