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04277e02d7
* All files with FSF copyright notices: Update copyright dates using scripts/update-copyrights. * locale/programs/charmap-kw.h: Regenerated. * locale/programs/locfile-kw.h: Likewise.
91 lines
2.7 KiB
ArmAsm
91 lines
2.7 KiB
ArmAsm
/* isnan(). PowerPC32/POWER7 version.
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Copyright (C) 2010-2019 Free Software Foundation, Inc.
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Contributed by Luis Machado <luisgpm@br.ibm.com>.
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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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.section .rodata.cst8,"aM",@progbits,8
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.align 3
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.LC0: /* 1.0 */
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.quad 0x3ff0000000000000
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.section ".text"
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.type __isnan, @function
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.machine power7
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ENTRY (__isnan)
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#ifdef SHARED
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mflr r11
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cfi_register(lr,r11)
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SETUP_GOT_ACCESS(r9,got_label)
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addis r9,r9,.LC0-got_label@ha
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lfd fp0,.LC0-got_label@l(r9)
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mtlr r11
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cfi_same_value (lr)
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#else
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lis r9,.LC0@ha
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lfd fp0,.LC0@l(r9)
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#endif
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ftdiv cr7,fp1,fp0
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li r3,0
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bflr 30 /* If not NaN or Inf, finish. */
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/* We have -INF/+INF/NaN or a denormal. */
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stwu r1,-16(r1) /* Allocate stack space. */
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stfd fp1,8(r1) /* Transfer FP to GPR's. */
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ori 2,2,0 /* Force a new dispatch group. */
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lwz r4,8+HIWORD(r1) /* Load the upper half of the FP value. */
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lwz r5,8+LOWORD(r1) /* Load the lower half of the FP value. */
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addi r1,r1,16 /* Reset the stack pointer. */
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lis r0,0x7ff0 /* Load the upper portion for an INF/NaN. */
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clrlwi r4,r4,1 /* r4 = abs(r4). */
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cmpw cr7,r4,r0 /* if (abs(r4) <= inf). */
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cmpwi cr6,r5,0 /* r5 == 0x00000000? */
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bltlr cr7 /* LT means we have a denormal. */
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bgt cr7,L(NaN) /* GT means we have a NaN. */
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beqlr cr6 /* EQ means we have +/-INF. */
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L(NaN):
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li r3,1 /* x == 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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strong_alias (__isnan, __isnanf)
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hidden_def (__isnanf)
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weak_alias (__isnanf, isnanf)
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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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