mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-04 19:00:09 +00:00
89 lines
2.5 KiB
ArmAsm
89 lines
2.5 KiB
ArmAsm
|
/* isinf(). PowerPC32/POWER7 version.
|
||
|
|
Copyright (C) 2010 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, write to the Free
|
||
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
||
|
|
02111-1307 USA. */
|
||
|
|
|
||
|
|
#include <sysdep.h>
|
||
|
|
#include <math_ldbl_opt.h>
|
||
|
|
|
||
|
|
/* int __isinf(x) */
|
||
|
|
.section .rodata.cst8,"aM",@progbits,8
|
||
|
|
.align 3
|
||
|
|
.LC0: /* 1.0 */
|
||
|
|
.quad 0x3ff0000000000000
|
||
|
|
|
||
|
|
.section ".text"
|
||
|
|
.type __isinf, @function
|
||
|
|
.machine power7
|
||
|
|
ENTRY (__isinf)
|
||
|
|
#ifdef SHARED
|
||
|
|
mflr r11
|
||
|
|
cfi_register(lr,r11)
|
||
|
|
|
||
|
|
bcl 20,31,1f
|
||
|
|
1: mflr r9
|
||
|
|
addis r9,r9,.LC0-1b@ha
|
||
|
|
lfd fp0,.LC0-1b@l(r9)
|
||
|
|
|
||
|
|
mtlr r11
|
||
|
|
cfi_same_value (lr)
|
||
|
|
#else
|
||
|
|
lis r9,.LC0@ha
|
||
|
|
lfd fp0,.LC0@l(r9)
|
||
|
|
#endif
|
||
|
|
ftdiv cr7,fp1,fp0
|
||
|
|
li r3,0
|
||
|
|
bflr 29 /* If not INF, return. */
|
||
|
|
|
||
|
|
/* Either we have -INF/+INF or a denormal. */
|
||
|
|
|
||
|
|
stwu r1,-16(r1) /* Allocate stack space. */
|
||
|
|
stfd fp1,8(r1) /* Transfer FP to GPR's. */
|
||
|
|
ori 2,2,0 /* Force a new dispatch group. */
|
||
|
|
lhz r4,8(r1) /* Fetch the upper portion of the high word of
|
||
|
|
the FP value (where the exponent and sign bits
|
||
|
|
are). */
|
||
|
|
addi r1,r1,16 /* Reset the stack pointer. */
|
||
|
|
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
|
||
|
|
|
||
|
|
#ifndef 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
|