[PATCH] D107899: [PowerPC] Implement builtin for vbpermd

[Bardia Mahjour via Phabricator via cfe-commits]

bmahjour added inline comments.


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Comment at: clang/lib/Headers/altivec.h:17337
 static __inline__ vector long long __ATTRS_o_ai
 vec_vbpermq(vector unsigned char __a, vector unsigned char __b) {
   return __builtin_altivec_vbpermq(__a, __b);
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lei wrote:
> bmahjour wrote:
> > This should be guarded under P8. It would also be good to add a `vec_vbpermd(vector unsigned long long ...)` counter part under `__POWER9_VECTOR__` for consistency.
> I think this is actually guarded under ` __POWER8_VECTOR__`.  See line 17237.
> As far as I can see, there is no LLVM intrinsic corresponding to vbpermd.
> I think this is actually guarded under  __POWER8_VECTOR__. See line 17237.

You are right. I missed that.

> As far as I can see, there is no LLVM intrinsic corresponding to vbpermd.

`__builtin_altivec_vbpermd` is being called on line 17356...not sure if it corresponds to an IR intrinsic or not, but regardless we have `vec_vbpermq` in this header but not `vec_vbpermd`. That seems inconsistent to me.


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  https://reviews.llvm.org/D107899/new/

https://reviews.llvm.org/D107899