Hi!
On Thu, Jul 15, 2021 at 06:29:17PM -0500, Paul A. Clarke wrote:
> Add a naive implementation of the subject x86 intrinsic to
> ease porting.
> --- a/gcc/config/rs6000/smmintrin.h
> +++ b/gcc/config/rs6000/smmintrin.h
> @@ -172,4 +172,31 @@ _mm_test_mix_ones_zeros (__m128i __A, __m128i __mask)
> return any_ones * any_zeros;
> }
>
> +/* Return horizontal packed word minimum and its index in bits [15:0]
> + and bits [18:16] respectively. */
> +__inline __m128i
> +__attribute__ ((__gnu_inline__, __always_inline__, __artificial__))
> +_mm_minpos_epu16 (__m128i __A)
> +{
> + union __u
> + {
> + __m128i __m;
> + __v8hu __uh;
> + };
> + union __u __u = { .__m = __A }, __r = { .__m = {0} };
> + unsigned short __ridx = 0;
> + unsigned short __rmin = __u.__uh[__ridx];
> + for (unsigned long __i = 1; __i < 8; __i++)
> + {
> + if (__u.__uh[__i] < __rmin)
> + {
> + __rmin = __u.__uh[__i];
> + __ridx = __i;
> + }
> + }
> + __r.__uh[0] = __rmin;
> + __r.__uh[1] = __ridx;
> + return __r.__m;
> +}
As before: does this work correctly on BE? Was it tested there?
Okay for trunk if so. Thanks!
Segher
