blob: 787e8d9ab9fff95adfee06f60ca993783ab7d74b (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
|
/* Internal libc stuff for 128-bit IEEE FP emulation routines.
Copyright (C) 1997 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#ifndef _QUAD_FLOAT_H
#define _QUAD_FLOAT_H 1
#include <fenv_libc.h>
/* Returns the number of leading zero bits in 'x' (between 0 and 32
inclusive). 'x' is treated as being 32 bits long. */
#define cntlzw(x) \
({ unsigned p = (x); \
unsigned r; \
asm ("cntlzw %0,%1" : "=r"(r) : "r"(p)); \
r; })
/* Returns the number of leading zero bits in 'x' (between 0 and 64
inclusive). 'x' is treated as being 64 bits long. */
#define cntlzd(x) \
({ unsigned long long q = (x); \
unsigned int c1, c2; \
c1 = cntlzw(q >> 32); \
c2 = cntlzw(q); \
c1 + (-(c1 >> 5) & c2); })
#define shift_and_or
#endif /* quad_float.h */
|
