While AMD GPU can't do 64x64 multiplies that give 128-bit results, they still can do a 32x32 multiply with a 64-bit result. (MULHI_INT and MULLO_INT instructions). And you can do add-with-carry manually on the AMD GPU…
While AMD GPU can't do 64x64 multiplies that give 128-bit results, they still can do a 32x32 multiply with a 64-bit result. (MULHI_INT and MULLO_INT instructions). And you can do add-with-carry manually on the AMD GPU…