From: Masashi Yoshimura <redacted>
Date: Thu, 8 Jan 2026 16:36:42 +0000 (+0900)
Subject: ggml-webgpu: Fix GGML_MEM_ALIGN to 8 for emscripten. (llama/18628)
X-Git-Tag: upstream/1.8.3~17
X-Git-Url: https://git.djapps.eu/?a=commitdiff_plain;h=a71127dfd803ad79dc69e0a9acc50735ea25c13a;p=pkg%2Fggml%2Fsources%2Fwhisper.cpp

ggml-webgpu: Fix GGML_MEM_ALIGN to 8 for emscripten. (llama/18628)

* Fix GGML_MEM_ALIGN to 8 for emscripten.

* Add a comment explaining the need for GGML_MEM_ALIGN == 8 in 64-bit wasm with emscripten
---

diff --git a/ggml/include/ggml.h b/ggml/include/ggml.h
index 20c912d0..b69583dd 100644
--- a/ggml/include/ggml.h
+++ b/ggml/include/ggml.h
@@ -234,6 +234,11 @@
 
 #if UINTPTR_MAX == 0xFFFFFFFF
     #define GGML_MEM_ALIGN 4
+#elif defined(__EMSCRIPTEN__)
+// emscripten uses max_align_t == 8, so we need GGML_MEM_ALIGN == 8 for 64-bit wasm.
+// (for 32-bit wasm, the first conditional is true and GGML_MEM_ALIGN stays 4.)
+// ref: https://github.com/ggml-org/llama.cpp/pull/18628
+    #define GGML_MEM_ALIGN 8
 #else
     #define GGML_MEM_ALIGN 16
 #endif