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87 lines
2.4 KiB
ArmAsm
87 lines
2.4 KiB
ArmAsm
/* isinf(). PowerPC32/POWER7 version.
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Copyright (C) 2010-2013 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 __isinf(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 __isinf, @function
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.machine power7
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ENTRY (__isinf)
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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 29 /* If not INF, return. */
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/* Either we have -INF/+INF 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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lhz r4,8(r1) /* Fetch the upper portion of the high word of
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the FP value (where the exponent and sign bits
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are). */
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addi r1,r1,16 /* Reset the stack pointer. */
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cmpwi cr7,r4,0x7ff0 /* r4 == 0x7ff0? */
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li r3,1
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beqlr cr7 /* EQ means INF, otherwise -INF. */
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li r3,-1
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blr
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END (__isinf)
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hidden_def (__isinf)
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weak_alias (__isinf, isinf)
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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 (__isinf, __isinff)
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hidden_def (__isinff)
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weak_alias (__isinff, isinff)
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#ifdef NO_LONG_DOUBLE
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strong_alias (__isinf, __isinfl)
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weak_alias (__isinf, isinfl)
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#endif
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#ifndef IS_IN_libm
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# if LONG_DOUBLE_COMPAT(libc, GLIBC_2_0)
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compat_symbol (libc, __isinf, __isinfl, GLIBC_2_0);
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compat_symbol (libc, isinf, isinfl, GLIBC_2_0);
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# endif
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#endif
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