`nasm -v 2>&1` =~ /NASM version ([2-9]\.[0-9]+)/ &&
$1>=2.03); # first version supporting AVX
+$ymm=1 if ($xmm && !$ymm && $ARGV[0] eq "win32" &&
+ `ml 2>&1` =~ /Version ([0-9]+)\./ &&
+ $1>=10); # first version supporting AVX
+
&external_label("OPENSSL_ia32cap_P") if ($xmm);