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/roundf.c | 39 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 lib/libm/roundf.c (limited to 'lib/libm/roundf.c') diff --git a/lib/libm/roundf.c b/lib/libm/roundf.c new file mode 100644 index 00000000..fef6a24b --- /dev/null +++ b/lib/libm/roundf.c @@ -0,0 +1,39 @@ +#include "libm.h" + +#if FLT_EVAL_METHOD == 0 +#define EPS FLT_EPSILON +#elif FLT_EVAL_METHOD == 1 +#define EPS DBL_EPSILON +#elif FLT_EVAL_METHOD == 2 +#define EPS LDBL_EPSILON +#endif +static const float_t toint = 1 / EPS; + +float roundf(float x) +{ + union { + float f; + uint32_t i; + } u = { x }; + int e = u.i >> 23 & 0xff; + float_t y; + + if (e >= 0x7f + 23) + return x; + if (u.i >> 31) + x = -x; + if (e < 0x7f - 1) { + FORCE_EVAL(x + toint); + return 0 * u.f; + } + y = x + toint - toint - x; + if (y > 0.5f) + y = y + x - 1; + else if (y <= -0.5f) + y = y + x + 1; + else + y = y + x; + if (u.i >> 31) + y = -y; + return y; +} -- cgit v1.2.3