gcc/testsuite/gcc.target/powerpc/bfp/vec-insert-exp-10.c

   1 /* { dg-do run { target { powerpc*-*-* } } } */
   2 /* { dg-require-effective-target p9vector_hw } */
   3 /* { dg-options "-mdejagnu-cpu=power9" } */
   4
   5 #include <altivec.h>
   6 #include <stdlib.h>
   7
   8 __vector float
   9 make_floats (__vector float *significands_p,
  10              __vector unsigned int *exponents_p)
  11 {
  12   __vector float significands = *significands_p;
  13   __vector unsigned int exponents = *exponents_p;
  14
  15   return vec_insert_exp (significands, exponents);
  16 }
  17
  18 int
  19 main ()
  20 {
  21   __vector unsigned int significands;
  22   __vector float *significands_p = (__vector float *) &significands;
  23   __vector unsigned int exponents;
  24   __vector float result;
  25
  26   /* 24 bits in significand, plus the sign bit: 0x80ffffff */
  27   significands[0] = 0x00800000; /*  1.0 */
  28   significands[1] = 0x00c00000; /*  1.5 */
  29   significands[2] = 0x80e00000; /* -1.75 */
  30   significands[3] = 0x80c00000; /* -1.5 */
  31
  32   exponents[0] = 127;           /*  exp = 0: 1.0 */
  33   exponents[1] = 128;           /*  exp = 1: 3.0 */
  34   exponents[2] = 129;           /*  exp = 2: -7.0 */
  35   exponents[3] = 125;           /* exp = -2: -0.375 */
  36
  37   result = make_floats (significands_p, &exponents);
  38   if ((result[0] != 1.0f) ||
  39       (result[1] != 3.0f) || (result[2] != -7.0f) || (result[3] != -0.375f))
  40     abort();
  41   return 0;
  42 }
  43