On Thu, Feb 24, 2022 at 5:21 PM Ian Lance Taylor <i...@golang.org> wrote:
> On Thu, Feb 24, 2022 at 9:40 AM Wojciech Muła <wojtek.m...@gmail.com> > wrote: > > > > I'm writing an implementation in x86 assembler and I need to force a > certain alignment of blocks of code (as it affects performance). I found > that there's PCALIGN directive, but it's only available for the PPC > architecture. It does not work for x86. > > > > Is there any easy way to achieve this for x86? If I had one loop, it > won't be a problem --- I'd just put a few `BYTE $0x90` and move on. The > problem is my code is huge, partially autogenerated with few variants. > > As far as I can tell PCALIGN is implemented for all architectures. > See, for example, https://docs.studygolang.com/src/cmd/internal/obj/arm64/doc.go . I couldn't find a similar document for x86_64 (or even just x86 or i386). However, I did eventually find https://github.com/golang/go/blob/master/src/cmd/asm/internal/asm/asm.go which makes it clear the PCALIGN directive is supported for all architectures; albeit with different valid values. Perhaps the O.P. isn't using it correctly for x86. This seems like a feature that could be better documented. :-) -- Kurtis Rader Caretaker of the exceptional canines Junior and Hank -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/golang-nuts/CABx2%3DD9pKH-p%3D569woCxFHb3LLh1sUA_yujKPBtKE57c%3D2KZuQ%40mail.gmail.com.
