From 31c18ed12d7b339db60289cf7fdf423108f339f1 Mon Sep 17 00:00:00 2001
From: Concedo <39025047+LostRuins@users.noreply.github.com>
Date: Tue, 12 May 2026 20:48:29 +0800
Subject: [PATCH] tentative fix for allReduce compile error from
 https://github.com/ggml-org/llama.cpp/pull/22299

---
 ggml/src/ggml-cuda/allreduce.cu | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/ggml/src/ggml-cuda/allreduce.cu b/ggml/src/ggml-cuda/allreduce.cu
index 434689abd..923dbcdc7 100644
--- a/ggml/src/ggml-cuda/allreduce.cu
+++ b/ggml/src/ggml-cuda/allreduce.cu
@@ -210,7 +210,9 @@ static __global__ void ggml_cuda_ar_add_kernel(
     const int nt  = gridDim.x * blockDim.x;
     for (int i = tid; i < count; i += nt) {
         const T_src d_low = ggml_cuda_cast<T_src>(dst[i]);
-        dst[i] = ggml_cuda_cast<T_dst>(d_low) + ggml_cuda_cast<T_dst>(src[i]);
+        const float a = (float) ggml_cuda_cast<float>(d_low);
+        const float b = (float) ggml_cuda_cast<float>(src[i]);
+        dst[i] = ggml_cuda_cast<T_dst>(a + b);
     }
 }