round 2 of denormal handling changes - detect DAZ support at runtime, and use accordingly. move all FPU feature detection into PBD::FPU

git-svn-id: svn://localhost/ardour2/trunk@1939 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 31 insertions, 0 deletions

diff --git a/libs/pbd/pbd/fpu.h b/libs/pbd/pbd/fpu.h
new file mode 100644
index 0000000000..617dcdf3da
--- /dev/null
+++ b/libs/pbd/pbd/fpu.h
@@ -0,0 +1,31 @@
+#ifndef __pbd_fpu_h__
+#define __pbd_fpu_h__
+
+namespace PBD {
+
+
+class FPU {
+  private:
+	enum Flags {
+		HasFlushToZero = 0x1,
+		HasDenormalsAreZero = 0x2,
+		HasSSE = 0x4,
+		HasSSE2 = 0x8
+	};
+
+  public:
+	FPU ();
+	~FPU ();
+
+	bool has_flush_to_zero () const { return _flags & HasFlushToZero; }
+	bool has_denormals_are_zero () const { return _flags & HasDenormalsAreZero; }
+	bool has_sse () const { return _flags & HasSSE; }
+	bool has_sse2 () const { return _flags & HasSSE2; }
+	
+  private:
+	Flags _flags;
+};
+
+}
+
+#endif /* __pbd_fpu_h__ */