blob: bcee02020a49840f99c1f7f76ee7925244e62916 (
plain) (
blame)
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
45
46
|
/* Round a float value to a long long in the current rounding mode.
Copyright (C) 1997-2015 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 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, see
<http://www.gnu.org/licenses/>. */
#include <math.h>
#include <math_private.h>
#include <stdint.h>
long long int
__llrintf (float x)
{
float rx = __rintf (x);
if (HAVE_PPC_FCTIDZ || rx != x)
return (long long int) rx;
else
{
float arx = fabsf (rx);
/* Avoid incorrect exceptions from libgcc conversions (as of GCC
5): <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59412>. */
if (arx < 0x1p31f)
return (long long int) (long int) rx;
else if (!(arx < 0x1p55f))
return (long long int) (long int) (rx * 0x1p-32f) << 32;
uint32_t i0;
GET_FLOAT_WORD (i0, rx);
int exponent = ((i0 >> 23) & 0xff) - 0x7f;
unsigned long long int mant = (i0 & 0x7fffff) | 0x800000;
mant <<= exponent - 23;
return (long long int) ((i0 & 0x80000000) != 0 ? -mant : mant);
}
}
weak_alias (__llrintf, llrintf)
|
