search for: vpgatherqd

...t;> The gather instruction requires a mask of which elements to read. When >>>> the gather completes, if there are no faults it will have written the mask >>>> register to 0. So it needs to reloaded for each gather. >>>> >>>> >>>>> * vpgatherqd ymm0 {k2}, zmmword ptr [zmm14] ; since zmm14 contains 8 >>>>> indexes ( or values at these 8 indexes???) so it will load 8 elements not >>>>> 16. here it should be zmm14**=[3200,3600,40000,.......54000]. but by >>>>> the above computation these indexes a...

...x i32*> %p) { %r = call <8 x i32> @llvm.masked.gather.v8i32(<8 x i32*> %p, i32 4, <8 x i1> <i1 true, i1 true, i1 true, i1 true, i1 true, i1 true, i1 true, i1 true>, <8 x i32> undef) ret 8 x i32>%r } Can be lowered to # BB#0: kxnorw %k0, %k0, %k1 vpgatherqd (,%zmm1), %ymm0 {%k1} retq Legal vectors of i1's require support for BUILD_VECTOR(i1, i1, .., i1), i1 EXTRACT_VEC_ELEMENT (...) and INSERT_VEC_ELEMENT(i1, ...) , so making i1 legal seemed like a sensible decision, and this is the current state in the top of trunk. However, making i1...