Determining that you only wrote to the bottom 32 bits of the register being copi...

ncmncm on July 11, 2022 | parent | context | favorite | on: The Problem with RISC-V V Mask Bits

Determining that you only wrote to the bottom 32 bits of the register being copied from is hard for hardware to see; and if the compiler can see, it has no way to tell the hardware.