Add a naive implementation of the subject x86 intrinsic to
ease porting.
2021-07-15 Paul A. Clarke <p...@us.ibm.com>
gcc
* config/rs6000/smmintrin.h (_mm_minpos_epu16): New.
---
v3: Minor formatting changes per review from Bill.
v2: Minor formatting changes per review from Segher.
gcc/config/rs6000/smmintrin.h | 27 +++++++++++++++++++++++++++
1 file changed, 27 insertions(+)
diff --git a/gcc/config/rs6000/smmintrin.h b/gcc/config/rs6000/smmintrin.h
index 16fd34d836ff..6a010fdbb96f 100644
--- 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;
+}
+
#endif
--
2.27.0
