"Erich Plondke" <[EMAIL PROTECTED]> wrote on 27/09/2006 18:17:55:
thanks for the detailed explanation, > Indeed, in your paper (grin) "Multi-platform Auto-vectorization" you > > define the functionality of realign load in terms of mis - the > misalignment > of the address (i.e., address&(VS)), as follows: The last > VS-mis bytes of > vector vec1 are concatenated to the first mis bytes of the > vector vec2. > > This is what the walign instruction does, but it's not quite what we > ended up with in GCC. > In the case that mis is 0, the GCC hook wants to end up with vec2, not vec1. > yes, what we describe in the paper is a bit more general than what we ended up implementing... > So for architectures that can align both ways, the current method is > fine, but if the > architecture is designed for one endian only we are going to have > trouble exploiting > the alignment feature. > I agree we need to add the alternatives you pointed out to make it applicable to more targets. This is now PR26268. dorit > Thanks, > > Erich > > -- > Why are ``tolerant'' people so intolerant of intolerant people?
