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#include <stdio.h>
#include <sys/types.h>

extern "C" {
extern unsigned short llvm_bswap_i16(unsigned short x);
extern unsigned int llvm_bswap_i32(unsigned int x);
extern int32_t llvm_ctlz_i32(int32_t x);
extern int64_t llvm_ctlz_i64(int64_t x);
extern int32_t llvm_cttz_i32(int32_t x);
extern int64_t llvm_cttz_i64(int64_t x);
extern int32_t llvm_ctpop_i32(int32_t x);
extern int64_t llvm_ctpop_i64(int64_t x);
extern int llvm_expect_i32(int x, int y);
}

int main(void) {
  unsigned short x = 0xc8ef;
  printf("%x,%x\n", x & 0xff, x >> 8);
  x = llvm_bswap_i16(x);
  printf("%x,%x\n", x & 0xff, x >> 8);

  unsigned int y = 0xc5de158a;
  printf("%x,%x,%x,%x\n", y & 0xff, (y >> 8) & 0xff, (y >> 16) & 0xff,
         (y >> 24) & 0xff);
  y = llvm_bswap_i32(y);
  printf("%x,%x,%x,%x\n", y & 0xff, (y >> 8) & 0xff, (y >> 16) & 0xff,
         (y >> 24) & 0xff);

  printf("%d,%d\n", (int)llvm_ctlz_i64(((int64_t)1) << 40),
         llvm_ctlz_i32(1 << 10));
  printf("%d,%d\n", (int)llvm_cttz_i64(((int64_t)1) << 40),
         llvm_cttz_i32(1 << 10));
  printf("%d,%d\n", (int)llvm_ctpop_i64((0x3101ULL << 32) | 1),
         llvm_ctpop_i32(0x3101));
  printf("%d\n", (int)llvm_ctpop_i32(-594093059));

  printf("%d\n", llvm_expect_i32(x % 27, 3));

  int64_t a = 1;
  a = __builtin_bswap64(a);
  printf("%lld\n", a);

  return 0;
}