From 951cd4503ff3c4cc93c1a36cf06138b1ddd739d7 Mon Sep 17 00:00:00 2001
From: jsing <>
Date: Mon, 9 Jun 2025 14:28:34 +0000
Subject: 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@
---
 src/lib/libcrypto/modes/asm/ghash-x86.pl | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

(limited to 'src/lib/libcrypto/modes/asm')

diff --git a/src/lib/libcrypto/modes/asm/ghash-x86.pl b/src/lib/libcrypto/modes/asm/ghash-x86.pl
index 47833582b6..395c680cc5 100644
--- a/src/lib/libcrypto/modes/asm/ghash-x86.pl
+++ b/src/lib/libcrypto/modes/asm/ghash-x86.pl
@@ -119,8 +119,7 @@ require "x86asm.pl";
 
 &asm_init($ARGV[0],"ghash-x86.pl",$x86only = $ARGV[$#ARGV] eq "386");
 
-$sse2=0;
-for (@ARGV) { $sse2=1 if (/-DOPENSSL_IA32_SSE2/); }
+$sse2=1;
 
 ($Zhh,$Zhl,$Zlh,$Zll) = ("ebp","edx","ecx","ebx");
 $inp  = "edi";
-- 
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