On 01/09/18 18:50, Richard Earnshaw (lists) wrote: > On 09/01/18 17:36, Bernd Edlinger wrote: >> Richard Earnshaw wrote: >> > Let me give an example, we use the generic code expansion if we >> > encounter the builtin when generating code for Thumb on pre-ARMv7 >> > devices. We don't have instructions in 'thumb1' to guard against >> > speculation and we really want to warn users that they've done this (it >> > might be a mistake in how they're invoking the compiler). >> >> Instead of this warning in one of the unsupported cases, could you use >> the DSB SYS + ISB barrier as the white paper suggests? >> >> >> Bernd. > > Thumb1 doesn't have those instructions. >
Ah, well, and in the case mode == TImode ? Bernd.
