Mirror of forum.nim-lang.org

277 :: Error when exposing intrinsics

• stringer (orginal) [2013-10-15T08:57:09+02:00] view original

  Hi, I have some issues exposing C intrinsics to Nimrod. I'm not sure at all if I use the right pragmas and types. Here's my code:

  
  type
    m256* {.pure, bycopy, final.} = object
      v0,v1,v2,v3,v4,v5,v6,v7: float32
  
  proc mm256_add_ps* (m1: m256, m2: m256): m256 {.nodecl, importc: "_mm256_add_ps", header: "<immintrin.h>".}
  Run

  $ nimrod --parallelBuild:1 --passl:mavx -r c main

  nimcache/nimtest_main.c:256:11: error: incompatible types when assigning to type ‘m256118005’ from type ‘int’

  Thanks!

---

• Araq (orginal) [2013-10-15T19:55:46+02:00] view original

  pure and final are not necessary anymore and header implies nodecl. But I can only guess what's wrong here: Tried --passl:"-mavx"? Oh and you also need importc: "__m256", header: "<immintrin.h>" for the m256 type.

---

• stringer (orginal) [2013-10-17T07:21:26+02:00] view original

  Hi, thanks! My bad, I was using --passl:-mavx instead of --passc:-mavx.

  Btw, are there any pragmas to align a type on 16/32 byte boundaries, as it required for load/store intrinsics? It seems to be the case for me, but it could have segfaulted (unless Nimrod assures this behavior).

---