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45 lines
1.6 KiB
C
45 lines
1.6 KiB
C
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/* Internal libc stuff for 128-bit IEEE FP emulation routines.
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Copyright (C) 1997 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#ifndef _QUAD_FLOAT_H
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#define _QUAD_FLOAT_H 1
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#include <fenv_libc.h>
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/* Returns the number of leading zero bits in 'x' (between 0 and 32
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inclusive). 'x' is treated as being 32 bits long. */
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#define cntlzw(x) \
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({ unsigned p = (x); \
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unsigned r; \
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asm ("cntlzw %0,%1" : "=r"(r) : "r"(p)); \
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r; })
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/* Returns the number of leading zero bits in 'x' (between 0 and 64
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inclusive). 'x' is treated as being 64 bits long. */
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#define cntlzd(x) \
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({ unsigned long long q = (x); \
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unsigned int c1, c2; \
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c1 = cntlzw(q >> 32); \
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c2 = cntlzw(q); \
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c1 + (-(c1 >> 5) & c2); })
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#define shift_and_or
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#endif /* quad_float.h */
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