refactor headers, especially alltypes.h, and improve C++ ABI compat

[musl] / src / math / fma.c

diff --git a/src/math/fma.c b/src/math/fma.c
index 89def79..850a4a6 100644 (file)
--- a/src/math/fma.c
+++ b/src/math/fma.c
@@ -441,6 +441,8 @@ double fma(double x, double y, double z)
                /*
                 * There is no need to worry about double rounding in directed
                 * rounding modes.
+                * TODO: underflow is not raised properly, example in downward rounding:
+                * fma(0x1.000000001p-1000, 0x1.000000001p-30, -0x1p-1066)
                 */
                fesetround(oround);
                adj = r.lo + xy.lo;