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ibit_logic_imm.c (500B)

      1 /* 32-bit bitwise ops with an immediate operand. On aarch64 these use the
      2  * logical-immediate (bitmask) encoding of and/orr/eor when the constant is a
      3  * representable bitmask. volatile on the variable side keeps the op live.
      4  *   a = 0x3C;  a & 0xF0 = 0x30 (48);  a | 0x03 = 0x3F (63)
      5  *   a ^ 0xFF = 0xC3 (195);  (48 + 63 + 195) - 264 = 42. */
      6 int test_main(void) {
      7   volatile int a = 0x3C;
      8   int and_ = a & 0xF0;
      9   int or_ = a | 0x03;
     10   int xor_ = a ^ 0xFF;
     11   return (and_ + or_ + xor_) - 264;
     12 }