gcc/testsuite/gcc.target/arm/sdiv_costs_1.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O3 -march=armv8-a" } */
   3 /* { dg-require-effective-target arm_hard_vfp_ok }  */
   4
   5 /* Both sdiv and udiv can be used here, so prefer udiv.  */
   6 int f1 (unsigned char *p)
   7 {
   8   return 100 / p[1];
   9 }
  10
  11 int f2 (unsigned char *p, unsigned short x)
  12 {
  13   return x / p[0];
  14 }
  15
  16 int f3 (unsigned char *p, int x)
  17 {
  18   x &= 0x7fffffff;
  19   return x / p[0];
  20 }
  21
  22 int f5 (unsigned char *p, unsigned short x)
  23 {
  24   return x % p[0];
  25 }
  26
  27 /* This should only generate signed divisions.  */
  28 int f4 (unsigned char *p)
  29 {
  30   return -100 / p[1];
  31 }
  32
  33 int f6 (unsigned char *p, short x)
  34 {
  35   return x % p[0];
  36 }
  37
  38 /* { dg-final { scan-assembler-times "udiv\tr\[0-9\]+, r\[0-9\]+, r\[0-9\]+" 4 } } */
  39 /* { dg-final { scan-assembler-times "sdiv\tr\[0-9\]+, r\[0-9\]+, r\[0-9\]+" 2 } } */