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configure: add configure option avx512f_opt 

If it is enabled, config-host.mak will have CONFIG_AVX512F_OPT defined.

AVX512F instruction set is available since Intel Skylake, and can be enabled in
compiling with -mavx512f.
More info:
https://software.intel.com/sites/default/files/managed/c5/15/architecture-instruction-set-extensions-programming-reference.pdf

Signed-off-by: Robert Hoo <robert.hu@linux.intel.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Robert Hoo 2020-02-29 20:34:34 +08:00 committed by Paolo Bonzini
parent 880a7817c1
commit 6b8cd447ef
1 changed files with 41 additions and 0 deletions
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41
configure vendored
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@ -1421,6 +1421,11 @@ for opt do
;;
--enable-avx2) avx2_opt="yes"
;;
--disable-avx512f) avx512f_opt="no"
;;
--enable-avx512f) avx512f_opt="yes"
;;
--enable-glusterfs) glusterfs="yes"
;;
--disable-virtio-blk-data-plane|--enable-virtio-blk-data-plane)
@ -1857,6 +1862,7 @@ disabled with --disable-FEATURE, default is enabled if available:
tcmalloc tcmalloc support
jemalloc jemalloc support
avx2 AVX2 optimization support
avx512f AVX512F optimization support
replication replication support
opengl opengl support
virglrenderer virgl rendering support
@ -5574,6 +5580,36 @@ EOF
fi
fi
##########################################
# avx512f optimization requirement check
#
# There is no point enabling this if cpuid.h is not usable,
# since we won't be able to select the new routines.
# by default, it is turned off.
# if user explicitly want to enable it, check environment
if test "$cpuid_h" = "yes" && test "$avx512f_opt" = "yes"; then
cat > $TMPC << EOF
#pragma GCC push_options
#pragma GCC target("avx512f")
#include <cpuid.h>
#include <immintrin.h>
static int bar(void *a) {
__m512i x = *(__m512i *)a;
return _mm512_test_epi64_mask(x, x);
}
int main(int argc, char *argv[])
{
return bar(argv[0]);
}
EOF
if ! compile_object "" ; then
avx512f_opt="no"
fi
else
avx512f_opt="no"
fi
########################################
# check if __[u]int128_t is usable.
@ -6717,6 +6753,7 @@ echo "libxml2 $libxml2"
echo "tcmalloc support $tcmalloc"
echo "jemalloc support $jemalloc"
echo "avx2 optimization $avx2_opt"
echo "avx512f optimization $avx512f_opt"
echo "replication support $replication"
echo "VxHS block device $vxhs"
echo "bochs support $bochs"
@ -7268,6 +7305,10 @@ if test "$avx2_opt" = "yes" ; then
echo "CONFIG_AVX2_OPT=y" >> $config_host_mak
fi
if test "$avx512f_opt" = "yes" ; then
echo "CONFIG_AVX512F_OPT=y" >> $config_host_mak
fi
if test "$lzo" = "yes" ; then
echo "CONFIG_LZO=y" >> $config_host_mak
fi