From: Paul Davis <paul@linuxaudiosystems.com>
Date: Wed, 12 Aug 2015 00:18:38 +0000 (-0400)
Subject: fix stupid logic error in testing separate bits required for AVX support
X-Git-Tag: 4.2~27
X-Git-Url: https://main.carlh.net/gitweb/?a=commitdiff_plain;h=bb399c8787f53fe590cdd3053d985c20f5dd8a96;p=ardour.git

fix stupid logic error in testing separate bits required for AVX support
---

diff --git a/libs/pbd/fpu.cc b/libs/pbd/fpu.cc
index 29d09f7aa9..93f75f7e2a 100644
--- a/libs/pbd/fpu.cc
+++ b/libs/pbd/fpu.cc
@@ -97,7 +97,10 @@ FPU::FPU ()
 #endif /* PLATFORM_WINDOWS */
 
 #ifndef __APPLE__
-	if (cpuflags & ((1<<27) /* AVX */ |(1<<28) /* XGETBV */)) {
+	/* must check for both AVX and OSXSAVE support in cpuflags before
+	 * attempting to use AVX related instructions.
+	 */
+	if ((cpuflags & (1<<27)) /* AVX */ && (cpuflags & (1<<28) /* (OS)XSAVE */)) {
 
 		std::cerr << "Looks like AVX\n";