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ggml-cpu : add check for ARM MATMUL_INT8/i8mm support #15922

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Merged
merged 1 commit into from
Sep 11, 2025
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ggml-cpu : add check for ARM MATMUL_INT8/i8mm support #15922

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8 changes: 7 additions & 1 deletion ggml/src/ggml-cpu/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -224,7 +224,13 @@ function(ggml_add_cpu_backend_variant_impl tag_name)
foreach(feature DOTPROD SVE MATMUL_INT8 FMA FP16_VECTOR_ARITHMETIC SME)
string(FIND "${ARM_FEATURE}" "__ARM_FEATURE_${feature} 1" feature_pos)
if (NOT ${feature_pos} EQUAL -1)
message(STATUS "ARM feature ${feature} enabled")
# Special handling for MATMUL_INT8 when machine doesn't support i8mm
if ("${feature}" STREQUAL "MATMUL_INT8" AND GGML_MACHINE_SUPPORTS_noi8mm)
message(STATUS "ARM feature ${feature} detected but unsetting due to machine not supporting i8mm")
list(APPEND ARCH_FLAGS -U__ARM_FEATURE_MATMUL_INT8)
else()
message(STATUS "ARM feature ${feature} enabled")
endif()
endif()
endforeach()
endif()
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