gcc/testsuite/gcc.target/nios2/pr87079-2.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -mhw-div -mhw-mul -mhw-mulx" } */
   3
   4 #include <stdint.h>
   5 #include <stddef.h>
   6
   7 void foo(const uint8_t* str, uint32_t* res)
   8 {
   9   uint32_t rdVal0, rdVal1, rdVal2;
  10   rdVal0 = rdVal1 = rdVal2 = 0;
  11   unsigned c;
  12   for (;;) {
  13     c = *str++;
  14     unsigned dig = c - '0';
  15     if (dig > 9)
  16       break; // non-digit
  17     uint64_t x10;
  18
  19     x10 = (uint64_t)rdVal0*10 + dig;
  20     rdVal0 = (uint32_t)x10;
  21     dig = (uint32_t)(x10 >> 32);
  22
  23     x10 = (uint64_t)rdVal1*10 + dig;
  24     rdVal1 = (uint32_t)x10;
  25     dig = (uint32_t)(x10 >> 32);
  26
  27     rdVal2 = rdVal2*10 + dig;
  28   }
  29   res[0] = rdVal0;
  30   res[1] = rdVal1;
  31   res[2] = rdVal2;
  32 }
  33
  34 /* { dg-final { scan-assembler-times "mulxuu\t" 2 } } */