51 lines
1.0 KiB
C
51 lines
1.0 KiB
C
/* { dg-do run } */
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/* { dg-options "-O3 -fno-inline" } */
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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 "bmi-check.h"
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unsigned calc_bextr_u32 (unsigned src1, unsigned src2)
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{
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unsigned res = 0;
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unsigned char start = (src2 & 0xff);
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unsigned char len = (int) ((src2 >> 8) & 0xff);
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if (start < 32) {
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unsigned i;
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unsigned last = (start+len) < 32 ? start+len : 32;
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src1 >>= start;
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for (i=start; i<last; ++i) {
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res |= (src1 & 1) << (i-start);
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src1 >>= 1;
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}
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}
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return res;
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}
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static void
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bmi_test ()
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{
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unsigned i;
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unsigned char start, len;
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unsigned src1 = 0xfacec0ff;
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unsigned res, res_ref, src2;
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for (i=0; i<5; ++i) {
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start = i * 4;
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len = i * 4;
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src1 = src1 * 3;
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src2 = (start & 0xff) | ((len & 0xff) << 8);
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res_ref = calc_bextr_u32 (src1, src2);
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res = _bextr_u32 (src1, start, len);
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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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