diff options
| author | Liang Li <liang.z.li@intel.com> | 2016-03-08 13:53:16 +0800 |
|---|---|---|
| committer | Timothy Pearson <tpearson@raptorengineering.com> | 2019-11-29 19:49:36 -0600 |
| commit | 418b755ad531ac8e83dc220a2e00b5598f6630a7 (patch) | |
| tree | 90138121717abcac5bfa51e32fdf8ce61a96e8e9 | |
| parent | 60c9ae2da6e9e7ba68c4a965d840068477dbabfa (diff) | |
| download | hqemu-418b755ad531ac8e83dc220a2e00b5598f6630a7.zip hqemu-418b755ad531ac8e83dc220a2e00b5598f6630a7.tar.gz | |
configure: detect ifunc and avx2 attribute
Detect if the compiler can support the ifun and avx2, if so, set
CONFIG_AVX2_OPT which will be used to turn on the avx2 instruction
optimization.
Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Suggested-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Liang Li <liang.z.li@intel.com>
Message-Id: <1457416397-26671-2-git-send-email-liang.z.li@intel.com>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
| -rwxr-xr-x | configure | 21 |
1 files changed, 21 insertions, 0 deletions
@@ -280,6 +280,7 @@ libusb="" usb_redir="" opengl="" opengl_dmabuf="no" +avx2_opt="no" zlib="yes" lzo="" snappy="" @@ -1797,6 +1798,21 @@ EOF fi ########################################## +# avx2 optimization requirement check + +cat > $TMPC << EOF +static void bar(void) {} +static void *bar_ifunc(void) {return (void*) bar;} +static void foo(void) __attribute__((ifunc("bar_ifunc"))); +int main(void) { foo(); return 0; } +EOF +if compile_prog "-mavx2" "" ; then + if readelf --syms $TMPE |grep "IFUNC.*foo" >/dev/null 2>&1; then + avx2_opt="yes" + fi +fi + +######################################### # zlib check if test "$zlib" != "no" ; then @@ -4814,6 +4830,7 @@ echo "bzip2 support $bzip2" echo "NUMA host support $numa" echo "tcmalloc support $tcmalloc" echo "jemalloc support $jemalloc" +echo "avx2 optimization $avx2_opt" echo "LLVM enabled $llvm (version `llvm-config --version`)" if test "$libopencsd" != ""; then @@ -5207,6 +5224,10 @@ if test "$opengl" = "yes" ; then fi fi +if test "$avx2_opt" = "yes" ; then + echo "CONFIG_AVX2_OPT=y" >> $config_host_mak +fi + if test "$lzo" = "yes" ; then echo "CONFIG_LZO=y" >> $config_host_mak fi |
