8000 Add detection code for avx/avx2/etc by howard0su · Pull Request #809 · ggml-org/llama.cpp · GitHub
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Add detection code for avx/avx2/etc #809

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Add detection code for avx/avx2/etc #809

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5f50d15
Add detection code for avx
howard0su Apr 1, 2023
7adce4f
Only check hardware when option is ON
howard0su Apr 7, 2023
ac072d7
Modify per code review sugguestions
howard0su Apr 16, 2023
a8a22ff
Build locally will detect CPU
howard0su Jun 1, 2023
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Add detection code for avx
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@howard0su
howard0su committed Jun 1, 2023
commit 5f50d151207b866eb4bf4ec1c799323ae0800545
108 changes: 108 additions & 0 deletions CMakeLists.txt
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Expand Up @@ -109,6 +109,114 @@ else()
message(WARNING "Git repository not found; to enable automatic generation of build info, make sure Git is installed and the project is a Git repository.")
endif()

INCLUDE(CheckCSourceRuns)

SET(AVX_CODE "
#include <immintrin.h>
int main()
{
__m256 a;
a = _mm256_set1_ps(0);
return 0;
}
")

SET(AVX512_CODE "
#include <immintrin.h>
int main()
{
__m512i a = _mm512_set_epi8(0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0);
__m512i b = a;
__mmask64 equality_mask = _mm512_cmp_epi8_mask(a, b, _MM_CMPINT_EQ);
return 0;
}
")

SET(AVX2_CODE "
#include <immintrin.h>
int main()
{
__m256i a = {0};
a = _mm256_abs_epi16(a);
__m256i x;
_mm256_extract_epi64(x, 0); // we rely on this in our AVX2 code
return 0;
}
")

SET(FMA_CODE "
#include <immintrin.h>
int main()
{
__m256 acc = _mm256_setzero_ps();
const __m256 d = _mm256_setzero_ps();
const __m256 p = _mm256_setzero_ps();
acc = _mm256_fmadd_ps( d, p, acc );
return 0;
}
")

MACRO(CHECK_SSE type flags)
SET(__FLAG_I 1)
SET(CMAKE_REQUIRED_FLAGS_SAVE ${CMAKE_REQUIRED_FLAGS})
FOREACH(__FLAG ${flags})
IF(NOT ${type}_FOUND)
SET(CMAKE_REQUIRED_FLAGS ${__FLAG})
CHECK_C_SOURCE_RUNS("${${type}_CODE}" HAS_${type}_${__FLAG_I})
IF(HAS_${type}_${__FLAG_I})
SET(${type}_FOUND TRUE CACHE BOOL "${type} support")
SET(${type}_FLAGS "${__FLAG}" CACHE STRING "${type} flags")
ENDIF()
MATH(EXPR __FLAG_I "${__FLAG_I}+1")
ENDIF()
ENDFOREACH()
SET(CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS_SAVE})

IF(NOT ${type}_FOUND)
SET(${type}_FOUND FALSE CACHE BOOL "${type} support")
SET(${type}_FLAGS "" CACHE STRING "${type} flags")
ENDIF()

MARK_AS_ADVANCED(${type}_FOUND ${type}_FLAGS)

ENDMACRO()

CHECK_SSE("AVX" " ;-mavx;/arch:AVX")
CHECK_SSE("AVX2" " ;-mavx2 -mfma;/arch:AVX2")
CHECK_SSE("AVX512" " ;-mavx512f -mavx512dq -mavx512vl -mavx512bw -mfma;/arch:AVX512")
CHECK_SSE("FMA" " ;-mfma;")

IF(${AVX_FOUND})
set(LLAMA_AVX ON)
ELSE()
set(LLAMA_AVX OFF)
ENDIF()

IF (${FMA_FOUND})
set(LLAMA_FMA ON)
ELSE()
set(LLAMA_FMA OFF)
ENDIF()

IF(${AVX2_FOUND})
set(LLAMA_AVX2 ON)
ELSE()
set(LLAMA_AVX2 OFF)
ENDIF()

IF(${AVX512_FOUND})
set(LLAMA_AVX512 ON)
ELSE()
set(LLAMA_AVX512 OFF)
ENDIF()

#
# Compile flags
#
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0