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

   1 /* { dg-do compile } */
   2 /* { dg-options "-O3" } */
   3 /* { dg-require-effective-target arm_arch_v8a_ok } */
   4 /* { dg-add-options arm_arch_v8a } */
   5
   6 /* Both sdiv and udiv can be used here, so prefer udiv.  */
   7 int f1 (unsigned char *p)
   8 {
   9   return 100 / p[1];
  10 }
  11
  12 int f2 (unsigned char *p, unsigned short x)
  13 {
  14   return x / p[0];
  15 }
  16
  17 int f3 (unsigned char *p, int x)
  18 {
  19   x &= 0x7fffffff;
  20   return x / p[0];
  21 }
  22
  23 int f5 (unsigned char *p, unsigned short x)
  24 {
  25   return x % p[0];
  26 }
  27
  28 /* This should only generate signed divisions.  */
  29 int f4 (unsigned char *p)
  30 {
  31   return -100 / p[1];
  32 }
  33
  34 int f6 (unsigned char *p, short x)
  35 {
  36   return x % p[0];
  37 }
  38
  39 /* { dg-final { scan-assembler-times "udiv\tr\[0-9\]+, r\[0-9\]+, r\[0-9\]+" 4 } } */
  40 /* { dg-final { scan-assembler-times "sdiv\tr\[0-9\]+, r\[0-9\]+, r\[0-9\]+" 2 } } */