From 63d591b2b87fc33b67d4e3c5521c995e59c68433 Mon Sep 17 00:00:00 2001
From: Jason Volk <jason@zemos.net>
Date: Mon, 4 Mar 2019 11:23:25 -0800
Subject: [PATCH] ircd::util::fpe: Add interface to set the except flag.

---
 include/ircd/util/fpe.h | 4 +++-
 ircd/util.cc            | 8 ++++++++
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/include/ircd/util/fpe.h b/include/ircd/util/fpe.h
index f8e0e2a9a..307dc80f1 100644
--- a/include/ircd/util/fpe.h
+++ b/include/ircd/util/fpe.h
@@ -18,7 +18,9 @@ namespace ircd::util::fpe
 	string_view reflect_sicode(const int &);
 	string_view reflect(const ushort &flag);
 	string_view reflect(const mutable_buffer &, const ushort &flags);
+
 	void throw_errors(const ushort &flags);
+	std::fexcept_t set(const ushort &flag);
 }
 
 /// Perform a single floating point operation at a time within the scope
@@ -26,7 +28,7 @@ namespace ircd::util::fpe
 /// unit for an error status flag and throw a C++ exception.
 struct ircd::util::fpe::errors_handle
 {
-	fexcept_t theirs;
+	std::fexcept_t theirs;
 
   public:
 	ushort pending() const;
diff --git a/ircd/util.cc b/ircd/util.cc
index b953c7f03..88d7168f9 100644
--- a/ircd/util.cc
+++ b/ircd/util.cc
@@ -32,6 +32,14 @@ ircd::util::size(std::ostream &s)
 #pragma STDC FENV_ACCESS on
 #endif
 
+std::fexcept_t
+ircd::util::fpe::set(const ushort &flags)
+{
+	std::fexcept_t theirs;
+	syscall(std::fesetexceptflag, &theirs, flags);
+	return theirs;
+}
+
 void
 ircd::util::fpe::throw_errors(const ushort &flags)
 {