From b5c4227dc653d581d336dd7026ea95b66124fb92 Mon Sep 17 00:00:00 2001 From: qiurui144 <39214303+qiurui144@users.noreply.github.com> Date: Wed, 29 Apr 2026 15:59:21 +0800 Subject: [PATCH] ggml-cpu: cmake: append xsmtvdotii march for SpacemiT IME (#22317) * ggml-cpu: cmake: append xsmtvdotii march for SpacemiT IME When GGML_CPU_RISCV64_SPACEMIT=ON is set, ime1_kernels.cpp contains inline asm for the vmadot family which requires the xsmtvdotii custom extension.(problem can see in some blogs and make sure in K3 platform) The current CMakeLists does not include xsmtvdotii, so any toolchain that honours the explicit -march (tested with SpacemiT GCC 15.2) fails at the assembler stage: Error: unrecognized opcode `vmadot v16,v14,v0', extension `xsmtvdotii' required Append _xsmtvdotii to MARCH_STR when GGML_CPU_RISCV64_SPACEMIT is enabled so the IME path can actually build with a capable toolchain. No effect on builds that leave GGML_CPU_RISCV64_SPACEMIT off. toolchain from https://www.spacemit.com/community/resources-download/Tools * Update ggml/src/ggml-cpu/CMakeLists.txt Co-authored-by: alex-spacemit --------- Co-authored-by: alex-spacemit --- ggml/src/ggml-cpu/CMakeLists.txt | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/ggml/src/ggml-cpu/CMakeLists.txt b/ggml/src/ggml-cpu/CMakeLists.txt index beebc4760..c1c225f01 100644 --- a/ggml/src/ggml-cpu/CMakeLists.txt +++ b/ggml/src/ggml-cpu/CMakeLists.txt @@ -485,6 +485,13 @@ function(ggml_add_cpu_backend_variant_impl tag_name) if (GGML_RV_ZIHINTPAUSE) string(APPEND MARCH_STR "_zihintpause") endif() + if (GGML_CPU_RISCV64_SPACEMIT) + # `xsmtvdotii' is only required for GCC >= 15. + if (CMAKE_C_COMPILER_ID STREQUAL "GNU" AND + CMAKE_C_COMPILER_VERSION VERSION_GREATER_EQUAL 15) + string(APPEND MARCH_STR "_xsmtvdotii") + endif() + endif() list(APPEND ARCH_FLAGS "-march=${MARCH_STR}" -mabi=lp64d) else()