1 /* 32-bit fixed point signed integer to 128-bit floating point.
2 Copyright (C) 1997 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
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.
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.
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. */
20 #include <quad_float.h>
22 /* long double _q_itoq(int a);
23 Convert 'a' to long double.
27 __q_itoq(unsigned int result
[4], int a
)
32 /* Note that if a==-2^31, then ua will be 2^31. */
33 unsigned int ua
= abs(a
);
39 /* Calculate the exponent, in 4 easy instructions. */
41 rx
= 16383+css
<< 16 & ~css
;
43 /* Copy the sign bit from 'a'. */
44 asm ("rlwimi %0,%1,0,0,0": "=r"(rx
) : "r"(a
), "0"(rx
));
46 /* Put it all together. */
47 result
[2] = result
[3] = 0;
48 asm ("rlwimi %0,%1,16,16,31": "=r"(result
[0]) : "r"(ua
), "0"(rx
));