From 885f5974cdf65b59415837ae97f5a14ef1350670 Mon Sep 17 00:00:00 2001 From: Kacper Date: Tue, 9 Dec 2025 19:20:15 +0100 Subject: feat: add gzip and new headers --- lib/libm/round.c | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 lib/libm/round.c (limited to 'lib/libm/round.c') diff --git a/lib/libm/round.c b/lib/libm/round.c new file mode 100644 index 00000000..aa36cce4 --- /dev/null +++ b/lib/libm/round.c @@ -0,0 +1,38 @@ +#include "libm.h" + +#if FLT_EVAL_METHOD == 0 || FLT_EVAL_METHOD == 1 +#define EPS DBL_EPSILON +#elif FLT_EVAL_METHOD == 2 +#define EPS LDBL_EPSILON +#endif +static const double_t toint = 1 / EPS; + +double round(double x) +{ + union { + double f; + uint64_t i; + } u = { x }; + int e = u.i >> 52 & 0x7ff; + double_t y; + + if (e >= 0x3ff + 52) + return x; + if (u.i >> 63) + x = -x; + if (e < 0x3ff - 1) { + /* raise inexact if x!=0 */ + FORCE_EVAL(x + toint); + return 0 * u.f; + } + y = x + toint - toint - x; + if (y > 0.5) + y = y + x - 1; + else if (y <= -0.5) + y = y + x + 1; + else + y = y + x; + if (u.i >> 63) + y = -y; + return y; +} -- cgit v1.2.3