From 30634165980deaeead9f4e71e0ff6a5c9d897776 Mon Sep 17 00:00:00 2001
From: Ian Moffett <ian@osmora.org>
Date: Mon, 14 Jul 2025 22:39:34 -0400
Subject: usr: libc: Add math.h + musl math impl port

Signed-off-by: Ian Moffett <ian@osmora.org>
---
 lib/libc/src/musl-math/copysignf.c | 10 ++++++++++
 1 file changed, 10 insertions(+)
 create mode 100644 lib/libc/src/musl-math/copysignf.c

(limited to 'lib/libc/src/musl-math/copysignf.c')

diff --git a/lib/libc/src/musl-math/copysignf.c b/lib/libc/src/musl-math/copysignf.c
new file mode 100644
index 0000000..0af6ae9
--- /dev/null
+++ b/lib/libc/src/musl-math/copysignf.c
@@ -0,0 +1,10 @@
+#include <math.h>
+#include <stdint.h>
+
+float copysignf(float x, float y)
+{
+	union {float f; uint32_t i;} ux={x}, uy={y};
+	ux.i &= 0x7fffffff;
+	ux.i |= uy.i & 0x80000000;
+	return ux.f;
+}
-- 
cgit v1.2.3