gcc/testsuite/gcc.target/i386/recip-vec-sqrtf.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -ffast-math -ftree-vectorize -msse -mfpmath=sse -mrecip -fno-common" } */
   3
   4 float a[4];
   5 float b[4];
   6 float r[4];
   7
   8 extern float sqrtf (float);
   9
  10 void t1(void)
  11 {
  12  int i;
  13
  14  for (i = 0; i < 4; i++)
  15    r[i] = a[i] / sqrtf (b[i]);
  16 }
  17
  18 void t2(void)
  19 {
  20  int i;
  21
  22  for (i = 0; i < 4; i++)
  23    r[i] = sqrtf (a[i] / b[i]);
  24 }
  25
  26 void t3(void)
  27 {
  28  int i;
  29
  30  for (i = 0; i < 4; i++)
  31    r[i] = sqrtf (a[i]);
  32 }
  33
  34 /* { dg-final { scan-assembler-times "rsqrtps" 3 } } */