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7759be2593
The arch13 memmove variant is currently selected by the ifunc selector if the Miscellaneous-Instruction-Extensions Facility 3 facility bit is present, but the function is also using vector instructions. If the vector support is not present, one is receiving an operation exception. Therefore this patch also checks for vector support in the ifunc selector and in ifunc-impl-list.c. Just to be sure, the configure check is now also testing an arch13 vector instruction and an arch13 Miscellaneous-Instruction-Extensions Facility 3 instruction.
55 lines
1.8 KiB
C
55 lines
1.8 KiB
C
/* Multiple versions of memmove.
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Copyright (C) 2016-2021 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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<https://www.gnu.org/licenses/>. */
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#include <ifunc-memcpy.h>
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#if HAVE_MEMMOVE_IFUNC
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/* If we don't use ifunc, an alias is defined for memmove
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in sysdeps/s390/memmove-c.c or sysdeps/s390/memcpy.S
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depending on the used default implementation. */
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# undef memmove
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# define memmove __redirect_memmove
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# include <string.h>
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# include <ifunc-resolve.h>
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# undef memmove
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# if HAVE_MEMMOVE_C
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extern __typeof (__redirect_memmove) MEMMOVE_C attribute_hidden;
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# endif
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# if HAVE_MEMMOVE_Z13
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extern __typeof (__redirect_memmove) MEMMOVE_Z13 attribute_hidden;
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# endif
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# if HAVE_MEMMOVE_ARCH13
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extern __typeof (__redirect_memmove) MEMMOVE_ARCH13 attribute_hidden;
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# endif
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s390_libc_ifunc_expr (__redirect_memmove, memmove,
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({
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s390_libc_ifunc_expr_stfle_init ();
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(HAVE_MEMMOVE_ARCH13 && (hwcap & HWCAP_S390_VXRS_EXT2)
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&& S390_IS_ARCH13_MIE3 (stfle_bits))
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? MEMMOVE_ARCH13
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: (HAVE_MEMMOVE_Z13 && (hwcap & HWCAP_S390_VX))
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? MEMMOVE_Z13
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: MEMMOVE_DEFAULT;
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})
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)
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#endif
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