From d17d07620001aa7e7fd8fa9507323e9fb4a3704e Mon Sep 17 00:00:00 2001
From: martynas <>
Date: Sun, 19 Jul 2015 17:41:49 +0000
Subject: [PATCH] Define new C99 macros: - MATH_ERRNO, MATH_ERREXCEPTION and
 math_errhandling - Optional FP_FAST_FMA{,F,L} macros if fma() executes as
 fast or faster than (x * y) + z;  which in practice is achievable if gcc
 implements __FP_FAST_FMA{,F,L} Reported by John Marino @ DragonFlyBSD.

---
 src/include/math.h | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/src/include/math.h b/src/include/math.h
index 02e1417a..b13ad5b5 100644
--- a/src/include/math.h
+++ b/src/include/math.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: math.h,v 1.33 2014/05/03 16:13:03 martynas Exp $	*/
+/*	$OpenBSD: math.h,v 1.34 2015/07/19 17:41:49 martynas Exp $	*/
 /*
  * ====================================================
  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
@@ -67,6 +67,22 @@ extern char __nan[];
 #define FP_ILOGB0	(-INT_MAX)
 #define FP_ILOGBNAN	INT_MAX
 
+#ifdef	__FP_FAST_FMA
+#define	FP_FAST_FMA	1
+#endif	/* __FP_FAST_FMA */
+
+#ifdef	__FP_FAST_FMAF
+#define	FP_FAST_FMAF	1
+#endif	/* __FP_FAST_FMAF */
+
+#ifdef	__FP_FAST_FMAL
+#define	FP_FAST_FMAL	1
+#endif	/* __FP_FAST_FMAL */
+
+#define	MATH_ERRNO	1
+#define	MATH_ERREXCEPT	2
+#define	math_errhandling	MATH_ERREXCEPT
+
 #define fpclassify(x) \
 	((sizeof (x) == sizeof (float)) ? \
 		__fpclassifyf(x) \