From 3d521d1bd8fea3d14b9add4b9e776d33b6a079a8 Mon Sep 17 00:00:00 2001
From: tyronecai <tyronecai@163.com>
Date: Wed, 8 Jul 2026 13:00:05 +0800
Subject: [PATCH] ggml : fix A indexing in simd_gemm scalar tail-column path
 (llama/25390)

`simd_gemm()` has an incorrect A-matrix index in the scalar tail-column path for full row blocks.
---
 ggml/src/ggml-cpu/simd-gemm.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ggml/src/ggml-cpu/simd-gemm.h b/ggml/src/ggml-cpu/simd-gemm.h
index 4119d04f8..2ebd10051 100644
--- a/ggml/src/ggml-cpu/simd-gemm.h
+++ b/ggml/src/ggml-cpu/simd-gemm.h
@@ -78,7 +78,7 @@ static void simd_gemm(
             for (int64_t i = 0; i < GEMM_RM; i++) {
                 float a = C[i * N + jj];
                 for (int64_t kk = 0; kk < K; kk++) {
-                    a += A[i + kk] * B[kk * N + jj];
+                    a += A[i * K + kk] * B[kk * N + jj];
                 }
                 C[i * N + jj] = a;
             }