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/frexpf.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) create mode 100644 lib/libc/src/musl-math/frexpf.c (limited to 'lib/libc/src/musl-math/frexpf.c') diff --git a/lib/libc/src/musl-math/frexpf.c b/lib/libc/src/musl-math/frexpf.c new file mode 100644 index 0000000..2dabe37 --- /dev/null +++ b/lib/libc/src/musl-math/frexpf.c @@ -0,0 +1,24 @@ +#include +#include + +float frexpf(float x, int *e) +{ + union { float f; uint32_t i; } y = { x }; + int ee = y.i>>23 & 0xff; + + if (!ee) { + if (x) { + x = frexpf(x*0x1p64, e); + *e -= 64; + } else *e = 0; + return x; + } else if (ee == 0xff) { + *e = 0; + return x; + } + + *e = ee - 0x7e; + y.i &= 0x807ffffful; + y.i |= 0x3f000000ul; + return y.f; +} -- cgit v1.2.3