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/frexp.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) create mode 100644 lib/libc/src/musl-math/frexp.c (limited to 'lib/libc/src/musl-math/frexp.c') diff --git a/lib/libc/src/musl-math/frexp.c b/lib/libc/src/musl-math/frexp.c new file mode 100644 index 0000000..abac0ea --- /dev/null +++ b/lib/libc/src/musl-math/frexp.c @@ -0,0 +1,24 @@ +#include +#include + +double frexp(double x, int *e) +{ + union { double d; uint64_t i; } y = { x }; + int ee = y.i>>52 & 0x7ff; + + if (!ee) { + if (x) { + x = frexp(x*0x1p64, e); + *e -= 64; + } else *e = 0; + return x; + } else if (ee == 0x7ff) { + *e = 0; + return x; + } + + *e = ee - 0x3fe; + y.i &= 0x800fffffffffffffull; + y.i |= 0x3fe0000000000000ull; + return y.d; +} -- cgit v1.2.3