39 lines
740 B
C
39 lines
740 B
C
/* { dg-do run } */
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/* { dg-options "-O3" } */
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/* { dg-require-effective-target lp64 } */
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/* { dg-require-effective-target ppc_cpu_supports_hw } */
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#define NO_WARN_X86_INTRINSICS 1
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#include <x86intrin.h>
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#include "bmi2-check.h"
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__attribute__((noinline))
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unsigned long long
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calc_bzhi_u64 (unsigned long long a, int l)
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{
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unsigned long long res = a;
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int i;
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for (i = 0; i < 64 - l; ++i)
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res &= ~(1LL << (63 - i));
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return res;
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}
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static void
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bmi2_test ()
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{
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unsigned i;
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unsigned long long src = 0xce7ace0ce7ace0ff;
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unsigned long long res, res_ref;
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for (i = 0; i < 5; ++i) {
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src = src * (i + 1);
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res_ref = calc_bzhi_u64 (src, i * 2);
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res = _bzhi_u64 (src, i * 2);
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if (res != res_ref)
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abort();
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}
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}
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