From 30634165980deaeead9f4e71e0ff6a5c9d897776 Mon Sep 17 00:00:00 2001 From: Ian Moffett Date: Mon, 14 Jul 2025 22:39:34 -0400 Subject: usr: libc: Add math.h + musl math impl port Signed-off-by: Ian Moffett --- lib/libc/src/musl-math/__signbitl.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) create mode 100644 lib/libc/src/musl-math/__signbitl.c (limited to 'lib/libc/src/musl-math/__signbitl.c') diff --git a/lib/libc/src/musl-math/__signbitl.c b/lib/libc/src/musl-math/__signbitl.c new file mode 100644 index 0000000..63b3dc5 --- /dev/null +++ b/lib/libc/src/musl-math/__signbitl.c @@ -0,0 +1,14 @@ +#include "libm.h" + +#if (LDBL_MANT_DIG == 64 || LDBL_MANT_DIG == 113) && LDBL_MAX_EXP == 16384 +int __signbitl(long double x) +{ + union ldshape u = {x}; + return u.i.se >> 15; +} +#elif LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024 +int __signbitl(long double x) +{ + return __signbit(x); +} +#endif -- cgit v1.2.3