Viewing file:  bmi-bextr-1.c (1.08 KB) -rw-r--r--
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/* { dg-do run } */
/* { dg-options "-O2 -fno-inline" } */
/* { dg-require-effective-target lp64 } */
/* { dg-require-effective-target ppc_cpu_supports_hw } */
#define NO_WARN_X86_INTRINSICS 1
#include <x86intrin.h>
#include "bmi-check.h"
long long calc_bextr_u64 (unsigned long long src1,
unsigned long long src2)
{
long long res = 0;
unsigned char start = (src2 & 0xff);
unsigned char len = (int) ((src2 >> 8) & 0xff);
if (start < 64) {
unsigned i;
unsigned last = (start+len) < 64 ? start+len : 64;
src1 >>= start;
for (i=start; i<last; ++i) {
res |= (src1 & 1) << (i-start);
src1 >>= 1;
}
}
return res;
}
static void
bmi_test ()
{
unsigned i;
unsigned char start, len;
unsigned long long src1 = 0xfacec0ffeefacec0;
unsigned long long res, res_ref, src2;
for (i=0; i<5; ++i) {
start = (i * 1983) % 64;
len = (i + (i * 1983)) % 64;
src1 = src1 * 3;
src2 = start | (((unsigned long long)len) << 8);
res_ref = calc_bextr_u64 (src1, src2);
res = __bextr_u64 (src1, src2);
if (res != res_ref)
abort ();
}
}
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