diff options
Diffstat (limited to 'sysdeps/m68k/fpu/s_llrint.c')
-rw-r--r-- | sysdeps/m68k/fpu/s_llrint.c | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/sysdeps/m68k/fpu/s_llrint.c b/sysdeps/m68k/fpu/s_llrint.c new file mode 100644 index 0000000000..8f2442982a --- /dev/null +++ b/sysdeps/m68k/fpu/s_llrint.c @@ -0,0 +1,76 @@ +/* Round argument to nearest integral value according to current rounding + direction. + Copyright (C) 1997, 1999 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <math.h> +#include "math_private.h" +#include "mathimpl.h" + +long long int +__llrint (double x) +{ + int32_t e; + u_int32_t h, l, s; + long long int result; + + x = __m81_u(__rint) (x); + + /* We could use __fixxfdi from libgcc, but here we can take advantage of + the known floating point format. */ + EXTRACT_WORDS (h, l, x); + + e = ((h >> 20) & 0x7ff) - 0x3ff; + if (e < 0) + return 0; + s = h; + h &= 0xfffff; + h |= 0x100000; + + if (e < 63) + { + if (e > 52) + { + h <<= e - 52; + h |= l >> (84 - e); + l <<= e - 52; + result = ((long long int) h << 32) | l; + } + else if (e > 20) + { + l >>= 52 - e; + l |= h << (e - 20); + h >>= 52 - e; + result = ((long long int) h << 32) | l; + } + else + result = h >> (20 - e); + if (s & 0x80000000) + result = -result; + } + else + /* The number is too large or not finite. The standard leaves it + undefined what to return when the number is too large to fit in a + `long long int'. */ + result = -1LL; + + return result; +} + +weak_alias (__llrint, llrint) |