lib: Add mlibc

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

1 files changed, 16 insertions, 0 deletions

diff --git a/lib/mlibc/options/ansi/musl-generic-math/copysignl.c b/lib/mlibc/options/ansi/musl-generic-math/copysignl.c
new file mode 100644
index 0000000..9dd933c
--- /dev/null
+++ b/lib/mlibc/options/ansi/musl-generic-math/copysignl.c
@@ -0,0 +1,16 @@
+#include "libm.h"
+
+#if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
+long double copysignl(long double x, long double y)
+{
+	return copysign(x, y);
+}
+#elif (LDBL_MANT_DIG == 64 || LDBL_MANT_DIG == 113) && LDBL_MAX_EXP == 16384
+long double copysignl(long double x, long double y)
+{
+	union ldshape ux = {x}, uy = {y};
+	ux.i.se &= 0x7fff;
+	ux.i.se |= uy.i.se & 0x8000;
+	return ux.f;
+}
+#endif