nissy-core

commit d9cbff9e9efbd6a84211ed001c3d0ea8b6fd3057
parent 950f3f27b1bbd883767ae282be25414e04f11465
Author: Sebastiano Tronto <sebastiano@tronto.net>
Date:   Wed,  6 Aug 2025 11:33:51 +0200

Remove AVX512 instruction

Diffstat:
M
src/arch/avx2.h
 | 
9
++++-----

1 file changed, 4 insertions(+), 5 deletions(-)
diff --git a/src/arch/avx2.h b/src/arch/avx2.h
@@ -430,13 +430,12 @@ invcoord_epe(uint64_t i)
 STATIC_INLINE bool
 is_eo_even(cube_t cube)
 {
-	uint8_t count;
+	uint32_t mask;
 	__m256i e;
 
 	e = _mm256_and_si256(cube, EO_AVX2);
-	e = _mm256_srli_si256(e, EOSHIFT);
+	e = _mm256_slli_epi16(e, 7-EOSHIFT);
+	mask = _mm256_movemask_epi8(e);
 
-	count = _mm256_reduce_add_epi8(e);
-
-	return count % 2 == 0;
+	return popcount_u32(mask) % 2;
 }