libc: Add musl math port

Signed-off-by: Ian Moffett <ian@osmora.org>

1 files changed, 18 insertions, 0 deletions

diff --git a/src/lib/libc/src/musl-math/nearbyintf.c b/src/lib/libc/src/musl-math/nearbyintf.c
new file mode 100644
index 0000000..092e9ff
--- /dev/null
+++ b/src/lib/libc/src/musl-math/nearbyintf.c
@@ -0,0 +1,18 @@
+#include <fenv.h>
+#include <math.h>
+
+float nearbyintf(float x)
+{
+#ifdef FE_INEXACT
+	#pragma STDC FENV_ACCESS ON
+	int e;
+
+	e = fetestexcept(FE_INEXACT);
+#endif
+	x = rintf(x);
+#ifdef FE_INEXACT
+	if (!e)
+		feclearexcept(FE_INEXACT);
+#endif
+	return x;
+}