1 files changed, 14 insertions, 0 deletions

diff --git a/src/arch/avx2.h b/src/arch/avx2.h
index 3fb46c9..cb9c0cd 100644
--- a/src/arch/avx2.h
+++ b/src/arch/avx2.h
@@ -426,3 +426,17 @@ invcoord_epe(uint64_t i)
 
         return _mm256_set_epi64x(a, SOLVED_L, 0, SOLVED_L);
 }
+
+STATIC_INLINE bool
+is_eo_even(cube_t cube)
+{
+        uint8_t count;
+        __m256i e;
+
+        e = _mm256_and_si256(cube, EO_AVX2);
+        e = _mm256_srli_si256(e, EOSHIFT);
+
+        count = _mm256_reduce_add_epi8(e);
+
+        return count % 2 == 0;
+}