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487972aea5
This patch add a optimized isnan/isnanf implementation for POWER8 using the new Move From VSR Doubleword instruction to gains some cycles from FP to GRP register move.
44 lines
1.6 KiB
C
44 lines
1.6 KiB
C
/* Multiple versions of isnan.
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Copyright (C) 2013-2014 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 <math.h>
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#include "init-arch.h"
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/* The double-precision implementation also works for the single one. */
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extern __typeof (__isnanf) __isnan_ppc64 attribute_hidden;
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extern __typeof (__isnanf) __isnan_power5 attribute_hidden;
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extern __typeof (__isnanf) __isnan_power6 attribute_hidden;
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extern __typeof (__isnanf) __isnan_power6x attribute_hidden;
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extern __typeof (__isnanf) __isnan_power7 attribute_hidden;
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extern __typeof (__isnanf) __isnan_power8 attribute_hidden;
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libc_ifunc (__isnanf,
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(hwcap2 & PPC_FEATURE2_ARCH_2_07)
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? __isnan_power8 :
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(hwcap & PPC_FEATURE_ARCH_2_06)
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? __isnan_power7 :
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(hwcap & PPC_FEATURE_POWER6_EXT)
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? __isnan_power6x :
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(hwcap & PPC_FEATURE_ARCH_2_05)
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? __isnan_power6 :
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(hwcap & PPC_FEATURE_POWER5)
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? __isnan_power5
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: __isnan_ppc64);
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weak_alias (__isnanf, isnanf)
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