From 69c5e9c07941212ac77368effd1c60db3140d4a3 Mon Sep 17 00:00:00 2001
From: Nikita Kostovsky <nikita@kostovsky.me>
Date: Sat, 8 Nov 2025 18:24:01 +0100
Subject: use vld1q_u32/vst1q_u32 for memcpy

---
 src/mem_utils.h | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 src/mem_utils.h

(limited to 'src/mem_utils.h')

diff --git a/src/mem_utils.h b/src/mem_utils.h
new file mode 100644
index 0000000..8601f78
--- /dev/null
+++ b/src/mem_utils.h
@@ -0,0 +1,25 @@
+#pragma once
+
+#include <cstddef>
+
+#include <arm_neon.h>
+
+template<std::size_t S>
+void memcpy_1by1(std::byte *dst, const std::byte *src)
+{
+    for (std::size_t i{0}; i < S; ++i) {
+        dst[i] = src[i];
+    }
+}
+
+using ARRAY_TYPE = uint32_t;
+template<std::size_t S>
+void memcpy_neon(ARRAY_TYPE *dst, const ARRAY_TYPE *src)
+{
+    uint32x4_t tmp;
+
+    for (std::size_t i{0}; i < (S / 4); i += 4) {
+        tmp = vld1q_u32(src + i);
+        vst1q_u32(&dst[i], tmp);
+    }
+}
-- 
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