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authorSzabolcs Nagy <nsz@port70.net>2018-12-02 18:53:37 +0000
committerRich Felker <dalias@aerifal.cx>2019-04-17 13:12:21 -0400
commit169fc008d8daf5265847c593b1c78f3513d9172b (patch)
tree6c9f0951c6ed4382dc48c625c24218cd5fe01cc1
parent3c3763fc529114e209aea08336a420c5d5be4dc2 (diff)
downloadmusl-169fc008d8daf5265847c593b1c78f3513d9172b.tar.gz
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).
-rw-r--r--src/internal/libm.h5
1 files changed, 5 insertions, 0 deletions
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)