From 7ff76870242b6906b6f3caf22da3c094822ed140 Mon Sep 17 00:00:00 2001
From: Sebastiano Tronto <sebastiano@tronto.net>
Date: Fri, 1 Aug 2025 23:32:19 +0200
Subject: Move is_eo_even to more appropriate module

---
 src/arch/avx2.h | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

(limited to 'src/arch/avx2.h')

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;
+}
-- 
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