ARM64 assembly pack: make it Windows-friendly.

[openssl.git] / crypto / arm64cpuid.pl

diff --git a/crypto/arm64cpuid.pl b/crypto/arm64cpuid.pl
index daa2b17ada6669c39289a15b92e04cffd295cdfe..f25c6373a4623ceff10069b601de86dc464e0ff0 100755 (executable)
--- a/crypto/arm64cpuid.pl
+++ b/crypto/arm64cpuid.pl
@@ -1,7 +1,7 @@
 #! /usr/bin/env perl
 # Copyright 2015-2018 The OpenSSL Project Authors. All Rights Reserved.
 #
-# Licensed under the OpenSSL license (the "License").  You may not use
+# Licensed under the Apache License 2.0 (the "License").  You may not use
 # this file except in compliance with the License.  You can obtain a copy
 # in the file LICENSE in the source distribution or at
 # https://www.openssl.org/source/license.html
@@ -115,6 +115,19 @@ OPENSSL_cleanse:
 CRYPTO_memcmp:
        eor     w3,w3,w3
        cbz     x2,.Lno_data    // len==0?
+       cmp     x2,#16
+       b.ne    .Loop_cmp
+       ldp     x8,x9,[x0]
+       ldp     x10,x11,[x1]
+       eor     x8,x8,x10
+       eor     x9,x9,x11
+       orr     x8,x8,x9
+       mov     x0,#1
+       cmp     x8,#0
+       csel    x0,xzr,x0,eq
+       ret
+
+.align 4
 .Loop_cmp:
        ldrb    w4,[x0],#1
        ldrb    w5,[x1],#1