aboutsummaryrefslogtreecommitdiffstats
path: root/sysdeps/powerpc/powerpc64/power7/fpu/s_isinf.S
blob: aed9d74d359adc810da431fdf6ed9d94d750a105 (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
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
/* isinf().  PowerPC64/POWER7 version.
   Copyright (C) 2010-2019 Free Software Foundation, Inc.
   Contributed by Luis Machado <luisgpm@br.ibm.com>.
   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 <sysdep.h>
#include <math_ldbl_opt.h>

/* int __isinf(x)  */
	.section    ".toc","aw"
.LC0:   /* 1.0 */
	.tc	    FD_ONE[TC],0x3ff0000000000000
	.section    ".text"
	.type	    __isinf, @function
	.machine    power7
ENTRY (__isinf, 4)
	CALL_MCOUNT 0
	lfd	fp0,.LC0@toc(r2)
	ftdiv	cr7,fp1,fp0
	li	r3,0
	bflr    29	      /* If not INF, return.  */

	/* Either we have -INF/+INF or a denormal.  */

	stfd    fp1,-16(r1)   /* Transfer FP to GPR's.  */
	ori	2,2,0	      /* Force a new dispatch group.  */
	lhz	r4,-16+HISHORT(r1)  /* Fetch the upper 16 bits of the FP value
				    (biased exponent and sign bit).  */
	cmpwi	cr7,r4,0x7ff0 /* r4 == 0x7ff0?  */
	li	r3,1
	beqlr   cr7	      /* EQ means INF, otherwise -INF.  */
	li      r3,-1
	blr
	END (__isinf)

hidden_def (__isinf)
weak_alias (__isinf, isinf)

/* It turns out that the 'double' version will also always work for
   single-precision.  */
strong_alias (__isinf, __isinff)
hidden_def (__isinff)
weak_alias (__isinff, isinff)

#ifdef NO_LONG_DOUBLE
strong_alias (__isinf, __isinfl)
weak_alias (__isinf, isinfl)
#endif

#if !IS_IN (libm)
# if LONG_DOUBLE_COMPAT(libc, GLIBC_2_0)
compat_symbol (libc, __isinf, __isinfl, GLIBC_2_0);
compat_symbol (libc, isinf, isinfl, GLIBC_2_0);
# endif
#endif