/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney                              │
│                                                                              │
│ This program is free software; you can redistribute it and/or modify         │
│ it under the terms of the GNU General Public License as published by         │
│ the Free Software Foundation; version 2 of the License.                      │
│                                                                              │
│ This program is distributed in the hope that it will be useful, but          │
│ WITHOUT ANY WARRANTY; without even the implied warranty of                   │
│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU             │
│ General Public License for more details.                                     │
│                                                                              │
│ You should have received a copy of the GNU General Public License            │
│ along with this program; if not, write to the Free Software                  │
│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA                │
│ 02110-1301 USA                                                               │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/tinymath/tinymath.h"

/**
 * Returns minimum of two long doubles.
 *
 * If one argument is NAN then the other is returned.
 * This function is designed to do the right thing with
 * signed zeroes.
 */
long double fminl(long double x, long double y) {
  if (__builtin_isnan(x)) return y;
  if (__builtin_isnan(y)) return x;
  if (__builtin_signbitl(x) != __builtin_signbitl(y)) {
    return __builtin_signbitl(x) ? x : y; /* C99 Annex F.9.9.2 */
  }
  return x < y ? x : y;
}