sysdeps/powerpc/quad_float.h

   1 /* Internal libc stuff for 128-bit IEEE FP emulation routines.
   2    Copyright (C) 1997 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Library General Public License as
   7    published by the Free Software Foundation; either version 2 of the
   8    License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Library General Public License for more details.
  14
  15    You should have received a copy of the GNU Library General Public
  16    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  17    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18    Boston, MA 02111-1307, USA.  */
  19
  20 #ifndef _QUAD_FLOAT_H
  21 #define _QUAD_FLOAT_H   1
  22
  23 #include <fenv_libc.h>
  24
  25 /* Returns the number of leading zero bits in 'x' (between 0 and 32
  26    inclusive).  'x' is treated as being 32 bits long.  */
  27 #define cntlzw(x) \
  28         ({ unsigned p = (x); \
  29            unsigned r; \
  30            asm ("cntlzw %0,%1" : "=r"(r) : "r"(p)); \
  31            r; })
  32
  33 /* Returns the number of leading zero bits in 'x' (between 0 and 64
  34    inclusive).  'x' is treated as being 64 bits long.  */
  35 #define cntlzd(x) \
  36         ({ unsigned long long q = (x); \
  37            unsigned int c1, c2; \
  38            c1 = cntlzw(q >> 32); \
  39            c2 = cntlzw(q); \
  40            c1 + (-(c1 >> 5) & c2); })
  41
  42 #define shift_and_or
  43
  44 #endif /* quad_float.h */