From: Szabolcs Nagy <nsz@port70.net>
Date: Sun, 2 Dec 2018 18:53:37 +0000 (+0000)
Subject: math: add configuration macros
X-Git-Tag: v1.1.23~57
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=169fc008d8daf5265847c593b1c78f3513d9172b;p=oweals%2Fmusl.git

math: add configuration macros

Musl currently aims to support non-nearest rounding mode and does not
support SNaNs. These macros allow marking relevant code paths in case
these decisions are changed later (they also help documenting the
corner cases involved).
---

diff --git a/src/internal/libm.h b/src/internal/libm.h
index 28537603..5212bab1 100644
--- a/src/internal/libm.h
+++ b/src/internal/libm.h
@@ -59,6 +59,11 @@ union ldshape {
 #error Unsupported long double representation
 #endif
 
+/* Support non-nearest rounding mode.  */
+#define WANT_ROUNDING 1
+/* Support signaling NaNs.  */
+#define WANT_SNAN 0
+
 /* Helps static branch prediction so hot path can be better optimized.  */
 #ifdef __GNUC__
 #define predict_true(x) __builtin_expect(!!(x), 1)