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58 lines
1.6 KiB
ArmAsm
58 lines
1.6 KiB
ArmAsm
/* isnan(). PowerPC32 version.
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Copyright (C) 2008-2016 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <sysdep.h>
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#include <math_ldbl_opt.h>
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/* int __isnan(x) */
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.machine power4
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EALIGN (__isnan, 4, 0)
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mffs fp0
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mtfsb0 4*cr6+lt /* reset_fpscr_bit (FPSCR_VE) */
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fcmpu cr7,fp1,fp1
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mtfsf 255,fp0
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li r3,0
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beqlr+ cr7 /* (x == x) then not a NAN */
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li r3,1 /* else must be a NAN */
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blr
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END (__isnan)
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hidden_def (__isnan)
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weak_alias (__isnan, isnan)
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/* It turns out that the 'double' version will also always work for
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single-precision. */
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#ifndef __isnan
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strong_alias (__isnan, __isnanf)
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hidden_def (__isnanf)
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weak_alias (__isnanf, isnanf)
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#endif
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#ifdef NO_LONG_DOUBLE
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strong_alias (__isnan, __isnanl)
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weak_alias (__isnan, isnanl)
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#endif
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#if !IS_IN (libm)
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# if LONG_DOUBLE_COMPAT(libc, GLIBC_2_0)
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compat_symbol (libc, __isnan, __isnanl, GLIBC_2_0);
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compat_symbol (libc, isnan, isnanl, GLIBC_2_0);
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# endif
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#endif
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