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https://github.com/ggml-org/llama.cpp.git
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c41ea36eaa
* Add detection code for avx * Only check hardware when option is ON * Modify per code review sugguestions * Build locally will detect CPU * Fixes CMake style to use lowercase like everywhere else * cleanup * fix merge * linux/gcc version for testing * msvc combines avx2 and fma into /arch:AVX2 so check for both * cleanup * msvc only version * style * Update FindSIMD.cmake --------- Co-authored-by: Howard Su <howard0su@gmail.com> Co-authored-by: Jeremy Dunn <jeremydunn123@gmail.com>
101 lines
2.6 KiB
CMake
101 lines
2.6 KiB
CMake
include(CheckCSourceRuns)
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set(AVX_CODE "
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#include <immintrin.h>
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int main()
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{
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__m256 a;
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a = _mm256_set1_ps(0);
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return 0;
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}
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")
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set(AVX512_CODE "
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#include <immintrin.h>
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int main()
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{
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__m512i a = _mm512_set_epi8(0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0);
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__m512i b = a;
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__mmask64 equality_mask = _mm512_cmp_epi8_mask(a, b, _MM_CMPINT_EQ);
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return 0;
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}
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")
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set(AVX2_CODE "
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#include <immintrin.h>
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int main()
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{
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__m256i a = {0};
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a = _mm256_abs_epi16(a);
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__m256i x;
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_mm256_extract_epi64(x, 0); // we rely on this in our AVX2 code
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return 0;
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}
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")
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set(FMA_CODE "
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#include <immintrin.h>
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int main()
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{
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__m256 acc = _mm256_setzero_ps();
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const __m256 d = _mm256_setzero_ps();
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const __m256 p = _mm256_setzero_ps();
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acc = _mm256_fmadd_ps( d, p, acc );
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return 0;
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}
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")
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macro(check_sse type flags)
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set(__FLAG_I 1)
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set(CMAKE_REQUIRED_FLAGS_SAVE ${CMAKE_REQUIRED_FLAGS})
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foreach (__FLAG ${flags})
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if (NOT ${type}_FOUND)
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set(CMAKE_REQUIRED_FLAGS ${__FLAG})
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check_c_source_runs("${${type}_CODE}" HAS_${type}_${__FLAG_I})
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if (HAS_${type}_${__FLAG_I})
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set(${type}_FOUND TRUE CACHE BOOL "${type} support")
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set(${type}_FLAGS "${__FLAG}" CACHE STRING "${type} flags")
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endif()
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math(EXPR __FLAG_I "${__FLAG_I}+1")
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endif()
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endforeach()
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set(CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS_SAVE})
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if (NOT ${type}_FOUND)
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set(${type}_FOUND FALSE CACHE BOOL "${type} support")
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set(${type}_FLAGS "" CACHE STRING "${type} flags")
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endif()
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mark_as_advanced(${type}_FOUND ${type}_FLAGS)
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endmacro()
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# flags are for MSVC only!
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check_sse("AVX" " ;/arch:AVX")
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if (NOT ${AVX_FOUND})
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set(LLAMA_AVX OFF)
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else()
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set(LLAMA_AVX ON)
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endif()
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check_sse("AVX2" " ;/arch:AVX2")
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check_sse("FMA" " ;/arch:AVX2")
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if ((NOT ${AVX2_FOUND}) OR (NOT ${FMA_FOUND}))
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set(LLAMA_AVX2 OFF)
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else()
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set(LLAMA_AVX2 ON)
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endif()
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check_sse("AVX512" " ;/arch:AVX512")
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if (NOT ${AVX512_FOUND})
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set(LLAMA_AVX512 OFF)
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else()
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set(LLAMA_AVX512 ON)
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endif()
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