src/cpu/ppc/vm/macroAssembler_ppc.hpp

rev 12397 : 8170991: PPC64: Bad code for initialization of short arrays
Summary: Implement special ClearArray nodes to improve initialization.
Reviewed-by:

*** 753,763 ****
    static bool is_trap_range_check(int x) {
      return is_trap_range_check_l(x) || is_trap_range_check_le(x) ||
             is_trap_range_check_g(x) || is_trap_range_check_ge(x);
    }
  
!   void clear_memory_doubleword(Register base_ptr, Register cnt_dwords, Register tmp = R0);
  
  #ifdef COMPILER2
    // Intrinsics for CompactStrings
    // Compress char[] to byte[] by compressing 16 bytes at once.
    void string_compress_16(Register src, Register dst, Register cnt,
--- 753,765 ----
    static bool is_trap_range_check(int x) {
      return is_trap_range_check_l(x) || is_trap_range_check_le(x) ||
             is_trap_range_check_g(x) || is_trap_range_check_ge(x);
    }
  
!   void clear_memory_unrolled(Register base_ptr, int cnt_dwords, Register tmp = R0, int offset = 0);
!   void clear_memory_constlen(Register base_ptr, int cnt_dwords, Register tmp = R0);
!   void clear_memory_doubleword(Register base_ptr, Register cnt_dwords, Register tmp = R0, long const_cnt = -1);
  
  #ifdef COMPILER2
    // Intrinsics for CompactStrings
    // Compress char[] to byte[] by compressing 16 bytes at once.
    void string_compress_16(Register src, Register dst, Register cnt,