Make OPENSSL_IA32_SSE2 the default for i386 and remove the flag.

The OPENSSL_IA32_SSE2 flag controls whether a number of the perlasm
scripts generate additional implementations that use SSE2 functionality.
In all cases except ghash, the code checks OPENSSL_ia32cap_P for SSE2
support, before trying to run SSE2 code. For ghash it generates a CLMUL
based implementation in addition to different MMX version (one MMX
version hides behind OPENSSL_IA32_SSE2, the other does not), however this
does not appear to actually use SSE2. We also disable AES-NI on i386 if
OPENSSL_IA32_SSE2.

On OpenBSD, we've always defined OPENSSL_IA32_SSE2 so this is effectively
a no-op. The only change is that we now check MMX rather than SSE2 for the
ghash MMX implementation.

ok bcook@ beck@

2 files changed, 2 insertions, 6 deletions

diff --git a/src/lib/libcrypto/sha/asm/sha1-586.pl b/src/lib/libcrypto/sha/asm/sha1-586.pl
index 72dd3badb1..d2491766f3 100644
--- a/src/lib/libcrypto/sha/asm/sha1-586.pl
+++ b/src/lib/libcrypto/sha/asm/sha1-586.pl
@@ -104,10 +104,7 @@ require "x86asm.pl";
 
 &asm_init($ARGV[0],"sha1-586.pl",$ARGV[$#ARGV] eq "386");
 
-$xmm=$ymm=0;
-for (@ARGV) { $xmm=1 if (/-DOPENSSL_IA32_SSE2/); }
-
-$ymm=1 if $xmm;
+$xmm=$ymm=1;
 
 &external_label("OPENSSL_ia32cap_P") if ($xmm);
 
diff --git a/src/lib/libcrypto/sha/asm/sha512-586.pl b/src/lib/libcrypto/sha/asm/sha512-586.pl
index c1d0684e92..fe1ff487bc 100644
--- a/src/lib/libcrypto/sha/asm/sha512-586.pl
+++ b/src/lib/libcrypto/sha/asm/sha512-586.pl
@@ -38,8 +38,7 @@ require "x86asm.pl";
 
 &asm_init($ARGV[0],"sha512-586.pl",$ARGV[$#ARGV] eq "386");
 
-$sse2=0;
-for (@ARGV) { $sse2=1 if (/-DOPENSSL_IA32_SSE2/); }
+$sse2=1;
 
 &external_label("OPENSSL_ia32cap_P") if ($sse2);