gcc/testsuite/gcc.target/avr/pr82931.c

   1 /* { dg-options "-Os" } */
   2 /* { dg-final { scan-assembler-times "bst" 4 } } */
   3 /* { dg-final { scan-assembler-times "bld" 4 } } */
   4
   5 typedef __UINT8_TYPE__ uint8_t;
   6 typedef __UINT16_TYPE__ uint16_t;
   7
   8 #define BitMask (1u << 14)
   9 #define Bit8Mask ((uint8_t) (1u << 4))
  10
  11 void merge1_8 (uint8_t *dst, const uint8_t *src)
  12 {
  13     *dst = (*src & Bit8Mask) | (*dst & ~ Bit8Mask);
  14 }
  15
  16 void merge2_8 (uint8_t *dst, const uint8_t *src)
  17 {
  18     *dst ^= (*dst ^ *src) & Bit8Mask;
  19 }
  20
  21 void merge1_16 (uint16_t *dst, const uint16_t *src)
  22 {
  23     *dst = (*src & BitMask) | (*dst & ~ BitMask);
  24 }
  25
  26 void merge2_16 (uint16_t *dst, const uint16_t *src)
  27 {
  28     *dst ^= (*dst ^ *src) & BitMask;
  29 }