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/truncf.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) create mode 100644 lib/libc/src/musl-math/truncf.c (limited to 'lib/libc/src/musl-math/truncf.c') diff --git a/lib/libc/src/musl-math/truncf.c b/lib/libc/src/musl-math/truncf.c new file mode 100644 index 0000000..1a7d03c --- /dev/null +++ b/lib/libc/src/musl-math/truncf.c @@ -0,0 +1,19 @@ +#include "libm.h" + +float truncf(float x) +{ + union {float f; uint32_t i;} u = {x}; + int e = (int)(u.i >> 23 & 0xff) - 0x7f + 9; + uint32_t m; + + if (e >= 23 + 9) + return x; + if (e < 9) + e = 1; + m = -1U >> e; + if ((u.i & m) == 0) + return x; + FORCE_EVAL(x + 0x1p120f); + u.i &= ~m; + return u.f; +} -- cgit v1.2.3