From e75ee11024befa163cbc0398f9e697e4b32c5f2c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Adrien=20Gallou=C3=ABt?= <angt@huggingface.co>
Date: Tue, 6 Jan 2026 07:54:10 +0100
Subject: [PATCH] ggml : fix avx512bf16 build (#18623)
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- include `immintrin.h` when required
- remove unused m512bh

Signed-off-by: Adrien Gallouët <angt@huggingface.co>
---
 ggml/src/ggml.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/ggml/src/ggml.c b/ggml/src/ggml.c
index eb3ae72eaa..09b8eb466d 100644
--- a/ggml/src/ggml.c
+++ b/ggml/src/ggml.c
@@ -53,13 +53,15 @@
 
 #define UNUSED GGML_UNUSED
 
+// Needed for ggml_fp32_to_bf16_row()
+#if defined(__AVX512BF16__)
 #if defined(_MSC_VER)
-#define m512bh(p) p
 #define m512i(p) p
 #else
-#define m512bh(p) (__m512bh)(p)
+#include <immintrin.h>
 #define m512i(p) (__m512i)(p)
-#endif
+#endif // defined(_MSC_VER)
+#endif // defined(__AVX512BF16__)
 
 #if defined(__linux__) || \
     defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || \