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

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