File: s_isinff.cpp

package info (click to toggle)
megaglest 3.12.0-2
  • links: PTS, VCS
  • area: main
  • in suites: stretch
  • size: 12,904 kB
  • ctags: 18,215
  • sloc: cpp: 144,232; ansic: 11,860; sh: 2,949; perl: 1,899; python: 1,751; objc: 142; asm: 42; makefile: 24
file content (32 lines) | stat: -rw-r--r-- 625 bytes parent folder | download | duplicates (6)
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
/* See the import.pl script for potential modifications */
/*
 * Copyright 2012 J.T. Conklin <jtc@netbsd.org>.
 * Public domain
 */

#if defined(LIBM_SCCS) && !defined(lint)
static char rcsid[] = "$NetBSD: s_isinff.c,v 1.3f 1995/05/11 23:20:21 jtc Exp $";
#endif

/*
 * isinff(x) returns 1 if x is inf, -1 if x is -inf, else 0;
 * no branching!
 */

#include "SMath.h"
#include "math_private.h"

namespace streflop_libm {
int
__isinff (Simple x)
{
	int32_t ix,t;
	GET_FLOAT_WORD(ix,x);
	t = ix & 0x7fffffff;
	t ^= 0x7f800000;
	t |= -t;
	return ~(t >> 31) & (ix >> 30);
}
hidden_def (__isinff)
weak_alias (__isinff, isinff)
}