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ggml-webgpu: Fix GGML_MEM_ALIGN to 8 for emscripten. #18628

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Merged
reeselevine merged 2 commits into from
Jan 8, 2026
Merged

ggml-webgpu: Fix GGML_MEM_ALIGN to 8 for emscripten. #18628

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88c254f
Fix GGML_MEM_ALIGN to 8 for emscripten.
yomaytk Jan 5, 2026
8dde886
Add a comment explaining the need for GGML_MEM_ALIGN == 8 in 64-bit w…
yomaytk Jan 8, 2026
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5 changes: 5 additions & 0 deletions ggml/include/ggml.h
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Original file line number Diff line number Diff line change
Expand Up @@ -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
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