gcc/testsuite/gcc.target/powerpc/bmi-bextr-2.c

   1 /* { dg-do run } */
   2 /* { dg-options "-O3 -fno-inline" } */
   3 /* { dg-require-effective-target lp64 } */
   4 /* { dg-require-effective-target ppc_cpu_supports_hw } */
   5
   6 #define NO_WARN_X86_INTRINSICS 1
   7 #include <x86intrin.h>
   8 #include "bmi-check.h"
   9
  10 unsigned calc_bextr_u32 (unsigned src1, unsigned src2)
  11 {
  12   unsigned res = 0;
  13   unsigned char start = (src2 & 0xff);
  14   unsigned char len = (int) ((src2 >> 8) & 0xff);
  15   if (start < 32) {
  16     unsigned i;
  17     unsigned last = (start+len) < 32 ? start+len : 32;
  18
  19     src1 >>= start;
  20     for (i=start; i<last; ++i) {
  21       res |= (src1 & 1) << (i-start);
  22       src1 >>= 1;
  23     }
  24   }
  25
  26   return res;
  27 }
  28
  29 static void
  30 bmi_test ()
  31 {
  32   unsigned i;
  33   unsigned char start, len;
  34   unsigned src1 = 0xfacec0ff;
  35   unsigned res, res_ref, src2;
  36
  37   for (i=0; i<5; ++i) {
  38     start = (i * 1983) % 32;
  39     len = (i + (i * 1983)) % 32;
  40
  41     src1 = src1 * 3;
  42     src2 = start | (((unsigned)len) << 8);
  43
  44     res_ref = calc_bextr_u32 (src1, src2);
  45     res = __bextr_u32 (src1, src2);
  46
  47     if (res != res_ref)
  48       abort();
  49   }
  50 }