1 /*

     2  * Copyright 2000-2005 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 (little endian)

    26 enum {

    27   pd_lo_word_offset_in_bytes = 0,

    28   pd_hi_word_offset_in_bytes = BytesPerWord

    29 };

    30 

    31 // explicit rounding operations are required to implement the strictFP mode

    32 enum {

    33   pd_strict_fp_requires_explicit_rounding = true

    34 };

    35 

    36 

    37 // registers

    38 enum {

    39   pd_nof_cpu_regs_frame_map = 8,  // number of registers used during code emission

    40   pd_nof_fpu_regs_frame_map = 8,  // number of registers used during code emission

    41   pd_nof_xmm_regs_frame_map = 8,  // number of registers used during code emission

    42   pd_nof_caller_save_cpu_regs_frame_map = 6,  // number of registers killed by calls

    43   pd_nof_caller_save_fpu_regs_frame_map = 8,  // number of registers killed by calls

    44   pd_nof_caller_save_xmm_regs_frame_map = 8,  // number of registers killed by calls

    45 

    46   pd_nof_cpu_regs_reg_alloc = 6,  // number of registers that are visible to register allocator

    47   pd_nof_fpu_regs_reg_alloc = 6,  // number of registers that are visible to register allocator

    48 

    49   pd_nof_cpu_regs_linearscan = 8, // number of registers visible to linear scan

    50   pd_nof_fpu_regs_linearscan = 8, // number of registers visible to linear scan

    51   pd_nof_xmm_regs_linearscan = 8, // number of registers visible to linear scan

    52   pd_first_cpu_reg = 0,

    53   pd_last_cpu_reg = 5,

    54   pd_first_byte_reg = 2,

    55   pd_last_byte_reg = 5,

    56   pd_first_fpu_reg = pd_nof_cpu_regs_frame_map,

    57   pd_last_fpu_reg =  pd_first_fpu_reg + 7,

    58   pd_first_xmm_reg = pd_nof_cpu_regs_frame_map + pd_nof_fpu_regs_frame_map,

    59   pd_last_xmm_reg =  pd_first_xmm_reg + 7

    60 };

    61 

    62 

    63 // encoding of float value in debug info:

    64 enum {

    65   pd_float_saved_as_double = true

    66 };