1 /*
   2  * Copyright 2000-2009 Sun Microsystems, Inc.  All Rights Reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  20  * CA 95054 USA or visit www.sun.com if you need additional information or
  21  * have any questions.
  22  *
  23  */
  24 
  25 // native word offsets from memory address (big endian)
  26 enum {
  27   pd_lo_word_offset_in_bytes = BytesPerInt,
  28   pd_hi_word_offset_in_bytes = 0
  29 };
  30 
  31 
  32 // explicit rounding operations are not required to implement the strictFP mode
  33 enum {
  34   pd_strict_fp_requires_explicit_rounding = false
  35 };
  36 
  37 
  38 // registers
  39 enum {
  40   pd_nof_cpu_regs_frame_map = 32,  // number of registers used during code emission
  41   pd_nof_caller_save_cpu_regs_frame_map = 10,  // number of cpu registers killed by calls
  42   pd_nof_cpu_regs_reg_alloc = 20,  // number of registers that are visible to register allocator
  43   pd_nof_cpu_regs_linearscan = 32,// number of registers visible linear scan
  44   pd_first_cpu_reg = 0,
  45   pd_last_cpu_reg = 31,
  46   pd_last_allocatable_cpu_reg = 19,
  47   pd_first_callee_saved_reg = 0,
  48   pd_last_callee_saved_reg = 13,
  49 
  50   pd_nof_fpu_regs_frame_map = 32,  // number of registers used during code emission
  51   pd_nof_caller_save_fpu_regs_frame_map = 32,  // number of fpu registers killed by calls
  52   pd_nof_fpu_regs_reg_alloc = 32,  // number of registers that are visible to register allocator
  53   pd_nof_fpu_regs_linearscan = 32, // number of registers visible to linear scan
  54   pd_first_fpu_reg = pd_nof_cpu_regs_frame_map,
  55   pd_last_fpu_reg =  pd_nof_cpu_regs_frame_map + pd_nof_fpu_regs_frame_map - 1,
  56 
  57   pd_nof_xmm_regs_linearscan = 0,
  58   pd_nof_caller_save_xmm_regs = 0,
  59   pd_first_xmm_reg = -1,
  60   pd_last_xmm_reg = -1
  61 };
  62 
  63 
  64 // for debug info: a float value in a register is saved in single precision by runtime stubs
  65 enum {
  66   pd_float_saved_as_double = false
  67 };