From 0998b40d2da6da5b257f38e9535a981ebc1b6e30 Mon Sep 17 00:00:00 2001
From: Jeffrey Walton <noloader@gmail.com>
Date: Wed, 21 Nov 2018 00:25:05 -0500
Subject: Disable Altivec for BLAKE2s on AIX 7.1 and XLC 12.01 (GH #743)

---
 blake2.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'blake2.cpp')

diff --git a/blake2.cpp b/blake2.cpp
index c05856d0..a9bea136 100644
--- a/blake2.cpp
+++ b/blake2.cpp
@@ -34,6 +34,14 @@
 # undef CRYPTOPP_ARM_NEON_AVAILABLE
 #endif
 
+// BLAKE2s bug on AIX 7.1 (POWER7) with XLC 12.01
+// https://github.com/weidai11/cryptopp/issues/743
+#if defined(__xlC__) && (__xlC__ < 0x0d01)
+# define CRYPTOPP_DISABLE_ALTIVEC 1
+# undef CRYPTOPP_POWER7_AVAILABLE
+# undef CRYPTOPP_ALTIVEC_AVAILABLE
+#endif
+
 NAMESPACE_BEGIN(CryptoPP)
 
 // Export the tables to the SIMD files
-- 
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