gcc/testsuite/gcc.target/i386/avx512f-vgetmantsd-2.c

   1 /* { dg-do run } */
   2 /* { dg-options "-mavx512f -O2 -std=c99" } */
   3 /* { dg-require-effective-target avx512f } */
   4 /* { dg-require-effective-target c99_runtime } */
   5
   6 #include "avx512f-check.h"
   7 #include <math.h>
   8
   9 union fp_int_t
  10 {
  11   long long int int_val;
  12   double fp_val;
  13 };
  14
  15 double
  16 get_norm_mant (double source, int signctrl, int interv)
  17 {
  18   long long src, sign, exp, fraction;
  19
  20   union fp_int_t bin_conv;
  21
  22   bin_conv.fp_val = source;
  23   src = bin_conv.int_val;
  24   sign = (signctrl & 0x1) ? 0 : (src >> 63);
  25   exp = (src & 0x7ff0000000000000) >> 52;
  26   fraction = (src & 0xfffffffffffff);
  27
  28   if (isnan (source))
  29     return signbit (source) ? -NAN : NAN;
  30   if (source == 0.0 || source == -0.0 || isinf (source))
  31     return sign ? -1.0 : 1.0;
  32   if (signbit (source) && (signctrl & 0x2))
  33     return -NAN;
  34   if (!isnormal (source))
  35     {
  36       src = (src & 0xfff7ffffffffffff);
  37       exp = 0x3ff;
  38       while (!(src & 0x8000000000000))
  39         {
  40           src += fraction & 0x8000000000000;
  41           fraction = fraction << 1;
  42           exp--;
  43         }
  44     }
  45
  46   switch (interv)
  47     {
  48     case 0:
  49       exp = 0x3ff;
  50       break;
  51     case 1:
  52       exp = ((exp - 0x3ff) & 0x1) ? 0x3fe : 0x3ff;
  53       break;
  54     case 2:
  55       exp = 0x3fe;
  56       break;
  57     case 3:
  58       exp = (fraction & 0x8000000000000) ? 0x3fe : 0x3ff;
  59       break;
  60     default:
  61       abort ();
  62     }
  63
  64   bin_conv.int_val = (sign << 63) | (exp << 52) | fraction;
  65   return bin_conv.fp_val;
  66 }
  67
  68 static void
  69 compute_vgetmantsd (double *r, double *s1, double *s2, int interv,
  70                     int signctrl)
  71 {
  72   r[0] = get_norm_mant (s2[0], signctrl, interv);
  73   r[1] = s1[1];
  74 }
  75
  76 static void
  77 avx512f_test (void)
  78 {
  79   union128d res1, src1, src2;
  80   double res_ref[2];
  81   int interv = _MM_MANT_NORM_p5_1;
  82   int signctrl = _MM_MANT_SIGN_src;
  83
  84   src1.x = _mm_set_pd (-3.0, 111.111);
  85   src2.x = _mm_set_pd (222.222, -2.0);
  86
  87   res1.x = _mm_getmant_sd (src1.x, src2.x, interv, signctrl);
  88
  89   compute_vgetmantsd (res_ref, src1.a, src2.a, interv, signctrl);
  90
  91   if (check_union128d (res1, res_ref))
  92     abort ();
  93 }