From bd5969fc876a10b18613302db7087ef3c40f18e1 Mon Sep 17 00:00:00 2001 From: Ian Moffett Date: Thu, 7 Mar 2024 17:28:00 -0500 Subject: lib: Add mlibc Signed-off-by: Ian Moffett --- lib/mlibc/options/ansi/musl-generic-math/trunc.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) create mode 100644 lib/mlibc/options/ansi/musl-generic-math/trunc.c (limited to 'lib/mlibc/options/ansi/musl-generic-math/trunc.c') diff --git a/lib/mlibc/options/ansi/musl-generic-math/trunc.c b/lib/mlibc/options/ansi/musl-generic-math/trunc.c new file mode 100644 index 0000000..d13711b --- /dev/null +++ b/lib/mlibc/options/ansi/musl-generic-math/trunc.c @@ -0,0 +1,19 @@ +#include "libm.h" + +double trunc(double x) +{ + union {double f; uint64_t i;} u = {x}; + int e = (int)(u.i >> 52 & 0x7ff) - 0x3ff + 12; + uint64_t m; + + if (e >= 52 + 12) + return x; + if (e < 12) + e = 1; + m = -1ULL >> e; + if ((u.i & m) == 0) + return x; + FORCE_EVAL(x + 0x1p120f); + u.i &= ~m; + return u.f; +} -- cgit v1.2.3