ArrayList5.hpp

static void pd_conjoint_bytes(void* from, void* to, size_t count) {
#ifdef AMD64
  (void)memmove(to, from, count);
#else
  // Includes a zero-count check.
  intx temp;
  __asm__ volatile("        testl   %6,%6          ;"
                   
                   ... Assembly here ...
                   
                   );
#endif // AMD64
}

static void pd_conjoint_bytes_atomic(void* from, void* to, size_t count) {
  pd_conjoint_bytes(from, to, count);
}

static void pd_conjoint_jshorts_atomic(jshort* from, jshort* to, size_t count) {
  _Copy_conjoint_jshorts_atomic(from, to, count);
}

static void pd_conjoint_jints_atomic(jint* from, jint* to, size_t count) {
#ifdef AMD64
  _Copy_conjoint_jints_atomic(from, to, count);
#else
  assert(HeapWordSize == BytesPerInt, "heapwords and jints must be the same size");
  // pd_conjoint_words is word-atomic in this implementation.
  pd_conjoint_words((HeapWord*)from, (HeapWord*)to, count);
#endif // AMD64
}

static void pd_conjoint_jlongs_atomic(jlong* from, jlong* to, size_t count) {
#ifdef AMD64
  _Copy_conjoint_jlongs_atomic(from, to, count);
#else
  // Guarantee use of fild/fistp or xmm regs via some asm code, because compilers won't.
  if (from > to) {
    while (count-- > 0) {
      __asm__ volatile("fildll (%0); fistpll (%1)"
                       :
                       : "r" (from), "r" (to)
                       : "memory" );
      ++from;
      ++to;
    }
  } else {
    while (count-- > 0) {
      __asm__ volatile("fildll (%0,%2,8); fistpll (%1,%2,8)"
                       :
                       : "r" (from), "r" (to), "r" (count)
                       : "memory" );
    }
  }
#endif // AMD64
}

static void pd_conjoint_oops_atomic(oop* from, oop* to, size_t count) {
#ifdef AMD64
  assert(BytesPerLong == BytesPerOop, "jlongs and oops must be the same size");
  _Copy_conjoint_jlongs_atomic((jlong*)from, (jlong*)to, count);
#else
  assert(HeapWordSize == BytesPerOop, "heapwords and oops must be the same size");
  // pd_conjoint_words is word-atomic in this implementation.
  pd_conjoint_words((HeapWord*)from, (HeapWord*)to, count);
#endif // AMD64
}

static void pd_arrayof_conjoint_bytes(HeapWord* from, HeapWord* to, size_t count) {
  _Copy_arrayof_conjoint_bytes(from, to, count);
}

static void pd_arrayof_conjoint_jshorts(HeapWord* from, HeapWord* to, size_t count) {
  _Copy_arrayof_conjoint_jshorts(from, to, count);
}

static void pd_arrayof_conjoint_jints(HeapWord* from, HeapWord* to, size_t count) {
#ifdef AMD64
   _Copy_arrayof_conjoint_jints(from, to, count);
#else
  pd_conjoint_jints_atomic((jint*)from, (jint*)to, count);
#endif // AMD64
}

static void pd_arrayof_conjoint_jlongs(HeapWord* from, HeapWord* to, size_t count) {
#ifdef AMD64
  _Copy_arrayof_conjoint_jlongs(from, to, count);
#else
  pd_conjoint_jlongs_atomic((jlong*)from, (jlong*)to, count);
#endif // AMD64
}

static void pd_arrayof_conjoint_oops(HeapWord* from, HeapWord* to, size_t count) {
#ifdef AMD64
  assert(BytesPerLong == BytesPerOop, "jlongs and oops must be the same size");
  _Copy_arrayof_conjoint_jlongs(from, to, count);
#else
  pd_conjoint_oops_atomic((oop*)from, (oop*)to, count);
#endif // AMD64
}