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7c124e3714
1. Install <bits/platform/x86.h> for <sys/platform/x86.h> which includes <bits/platform/x86.h>. 2. Rename HAS_CPU_FEATURE to CPU_FEATURE_PRESENT which checks if the processor has the feature. 3. Rename CPU_FEATURE_USABLE to CPU_FEATURE_ACTIVE which checks if the feature is active. There may be other preconditions, like sufficient stack space or further setup for AMX, which must be satisfied before the feature can be used. This fixes BZ #27958. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
73 lines
1.9 KiB
C
73 lines
1.9 KiB
C
/* Test string function in a transactionally executing RTM region.
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Copyright (C) 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 <string.h>
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#include <x86intrin.h>
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#include <sys/platform/x86.h>
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#include <support/check.h>
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#include <support/test-driver.h>
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static int
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do_test_1 (const char *name, unsigned int loop, int (*prepare) (void),
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int (*function) (void))
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{
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if (!CPU_FEATURE_ACTIVE (RTM))
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return EXIT_UNSUPPORTED;
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int status = prepare ();
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if (status != EXIT_SUCCESS)
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return status;
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unsigned int i;
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unsigned int naborts = 0;
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unsigned int failed = 0;
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for (i = 0; i < loop; i++)
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{
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failed |= function ();
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if (_xbegin() == _XBEGIN_STARTED)
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{
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failed |= function ();
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_xend();
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}
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else
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{
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failed |= function ();
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++naborts;
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}
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}
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if (failed)
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FAIL_EXIT1 ("%s() failed", name);
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if (naborts)
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{
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/* NB: Low single digit (<= 5%) noise-level aborts are normal for
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TSX. */
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double rate = 100 * ((double) naborts) / ((double) loop);
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if (rate > 5)
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FAIL_EXIT1 ("TSX abort rate: %.2f%% (%d out of %d)",
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rate, naborts, loop);
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}
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return EXIT_SUCCESS;
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}
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static int do_test (void);
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#include <support/test-driver.c>
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