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/copysign.c | 8 ++++++++ 1 file changed, 8 insertions(+) create mode 100644 lib/libc/src/musl-math/copysign.c (limited to 'lib/libc/src/musl-math/copysign.c') diff --git a/lib/libc/src/musl-math/copysign.c b/lib/libc/src/musl-math/copysign.c new file mode 100644 index 0000000..b09331b --- /dev/null +++ b/lib/libc/src/musl-math/copysign.c @@ -0,0 +1,8 @@ +#include "libm.h" + +double copysign(double x, double y) { + union {double f; uint64_t i;} ux={x}, uy={y}; + ux.i &= -1ULL/2; + ux.i |= uy.i & 1ULL<<63; + return ux.f; +} -- cgit v1.2.3