gcc/config/picochip/libgccExtras/subdi3.asm

   1 // picoChip ASM file
   2 //
   3 //   Support for 64-bit subtraction.
   4 //
   5 //   Copyright (C) 2003, 2004, 2005, 2008  Free Software Foundation, Inc.
   6 //   Contributed by picoChip Designs Ltd.
   7 //   Maintained by Hariharan Sandanagobalane (hariharan@picochip.com)
   8 //
   9 //   This file is free software; you can redistribute it and/or modify it
  10 //   under the terms of the GNU General Public License as published by the
  11 //   Free Software Foundation; either version 2, or (at your option) any
  12 //   later version.
  13 //
  14 //   In addition to the permissions in the GNU General Public License, the
  15 //   Free Software Foundation gives you unlimited permission to link the
  16 //   compiled version of this file into combinations with other programs,
  17 //   and to distribute those combinations without any restriction coming
  18 //   from the use of this file.  (The General Public License restrictions
  19 //   do apply in other respects; for example, they cover modification of
  20 //   the file, and distribution when not linked into a combine
  21 //   executable.)
  22 //
  23 //   This file is distributed in the hope that it will be useful, but
  24 //   WITHOUT ANY WARRANTY; without even the implied warranty of
  25 //   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  26 //   General Public License for more details.
  27 //
  28 //   You should have received a copy of the GNU General Public License
  29 //   along with this program; see the file COPYING.  If not, write to
  30 //   the Free Software Foundation, 51 Franklin Street, Fifth Floor,
  31 //   Boston, MA 02110-1301, USA..global __divmodhi4
  32
  33 .section .text
  34
  35 .align 8
  36 .global __subdi3
  37 __subdi3:
  38
  39 _picoMark_FUNCTION_BEGIN=
  40 // picoChip Function Prologue : &__subdi3 = 4 bytes
  41
  42         // The first operand of sub is completely in registers r[2-5]
  43         // The second operand of sub is in stack FP(0-3)
  44         // and result need to be written pointed to by the register r0.
  45         // All we need to do is to load the appropriate values, sub them
  46         // appropriately (with sub or subb) and then store the values back.
  47         ldw (FP)0, r1
  48         stl r[7:6], (FP)-1
  49         sub.0 r2, r1, r6
  50         ldw (FP)1, r1
  51         subb.0 r3, r1, r7
  52         ldl (FP)1, r[3:2]
  53         stl r[7:6], (r0)0
  54         subb.0 r4, r2, r6
  55         subb.0 r5, r3, r7
  56         stl r[7:6], (r0)1
  57         jr (r12)
  58 =->     ldl (FP)2, r[7:6]
  59
  60 _picoMark_FUNCTION_END=
  61 // picoChip Function Epilogue : __subdi3
  62
  63 //============================================================================
  64 // All DWARF information between this marker, and the END OF DWARF
  65 // marker should be included in the source file. Search for
  66 // FUNCTION_STACK_SIZE_GOES_HERE and FUNCTION NAME GOES HERE, and
  67 // provide the relevent information. Add markers called
  68 // _picoMark_FUNCTION_BEGIN and _picoMark_FUNCTION_END around the
  69 // function in question.
  70 //============================================================================
  71
  72 //============================================================================
  73 // Frame information.
  74 //============================================================================
  75
  76 .section .debug_frame
  77 _picoMark_DebugFrame=
  78
  79 // Common CIE header.
  80 .unalignedInitLong _picoMark_CieEnd-_picoMark_CieBegin
  81 _picoMark_CieBegin=
  82 .unalignedInitLong 0xffffffff
  83 .initByte 0x1   // CIE Version
  84 .ascii 16#0#    // CIE Augmentation
  85 .uleb128 0x1    // CIE Code Alignment Factor
  86 .sleb128 2      // CIE Data Alignment Factor
  87 .initByte 0xc   // CIE RA Column
  88 .initByte 0xc   // DW_CFA_def_cfa
  89 .uleb128 0xd
  90 .uleb128 0x0
  91 .align 2
  92 _picoMark_CieEnd=
  93
  94 // FDE
  95 _picoMark_LSFDE0I900821033007563=
  96 .unalignedInitLong _picoMark_FdeEnd-_picoMark_FdeBegin
  97 _picoMark_FdeBegin=
  98 .unalignedInitLong _picoMark_DebugFrame // FDE CIE offset
  99 .unalignedInitWord _picoMark_FUNCTION_BEGIN     // FDE initial location
 100 .unalignedInitWord _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN
 101 .initByte 0xe   // DW_CFA_def_cfa_offset
 102 .uleb128 0x4    // <-- FUNCTION_STACK_SIZE_GOES_HERE
 103 .initByte 0x4   // DW_CFA_advance_loc4
 104 .unalignedInitLong _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN
 105 .initByte 0xe   // DW_CFA_def_cfa_offset
 106 .uleb128 0x0
 107 .align 2
 108 _picoMark_FdeEnd=
 109
 110 //============================================================================
 111 // Abbrevation information.
 112 //============================================================================
 113
 114 .section .debug_abbrev
 115 _picoMark_ABBREVIATIONS=
 116
 117 .section .debug_abbrev
 118         .uleb128 0x1    // (abbrev code)
 119         .uleb128 0x11   // (TAG: DW_TAG_compile_unit)
 120         .initByte 0x1   // DW_children_yes
 121         .uleb128 0x10   // (DW_AT_stmt_list)
 122         .uleb128 0x6    // (DW_FORM_data4)
 123         .uleb128 0x12   // (DW_AT_high_pc)
 124         .uleb128 0x1    // (DW_FORM_addr)
 125         .uleb128 0x11   // (DW_AT_low_pc)
 126         .uleb128 0x1    // (DW_FORM_addr)
 127         .uleb128 0x25   // (DW_AT_producer)
 128         .uleb128 0x8    // (DW_FORM_string)
 129         .uleb128 0x13   // (DW_AT_language)
 130         .uleb128 0x5    // (DW_FORM_data2)
 131         .uleb128 0x3    // (DW_AT_name)
 132         .uleb128 0x8    // (DW_FORM_string)
 133 .initByte 0x0
 134 .initByte 0x0
 135
 136         .uleb128 0x2    ;# (abbrev code)
 137         .uleb128 0x2e   ;# (TAG: DW_TAG_subprogram)
 138 .initByte 0x0   ;# DW_children_no
 139         .uleb128 0x3    ;# (DW_AT_name)
 140         .uleb128 0x8    ;# (DW_FORM_string)
 141         .uleb128 0x11   ;# (DW_AT_low_pc)
 142         .uleb128 0x1    ;# (DW_FORM_addr)
 143         .uleb128 0x12   ;# (DW_AT_high_pc)
 144         .uleb128 0x1    ;# (DW_FORM_addr)
 145 .initByte 0x0
 146 .initByte 0x0
 147
 148 .initByte 0x0
 149
 150 //============================================================================
 151 // Line information. DwarfLib requires this to be present, but it can
 152 // be empty.
 153 //============================================================================
 154
 155 .section .debug_line
 156 _picoMark_LINES=
 157
 158 //============================================================================
 159 // Debug Information
 160 //============================================================================
 161 .section .debug_info
 162
 163 //Fixed header.
 164 .unalignedInitLong _picoMark_DEBUG_INFO_END-_picoMark_DEBUG_INFO_BEGIN
 165 _picoMark_DEBUG_INFO_BEGIN=
 166 .unalignedInitWord 0x2
 167 .unalignedInitLong _picoMark_ABBREVIATIONS
 168 .initByte 0x2
 169
 170 // Compile unit information.
 171 .uleb128 0x1    // (DIE 0xb) DW_TAG_compile_unit)
 172 .unalignedInitLong _picoMark_LINES
 173 .unalignedInitWord _picoMark_FUNCTION_END
 174 .unalignedInitWord _picoMark_FUNCTION_BEGIN
 175 // Producer is `picoChip'
 176 .ascii 16#70# 16#69# 16#63# 16#6f# 16#43# 16#68# 16#69# 16#70# 16#00#
 177 .unalignedInitWord 0xcafe // ASM language
 178 .ascii 16#0# // Name. DwarfLib expects this to be present.
 179
 180 .uleb128 0x2    ;# (DIE DW_TAG_subprogram)
 181
 182 // FUNCTION NAME GOES HERE. Use `echo name | od -t x1' to get the hex. Each hex
 183 // digit is specified using the format 16#XX#
 184 .ascii 16#5f# 16#73# 16#75# 16#62# 16#64# 16#69# 16#33# 16#0# // Function name `_subdi3'
 185 .unalignedInitWord _picoMark_FUNCTION_BEGIN     // DW_AT_low_pc
 186 .unalignedInitWord _picoMark_FUNCTION_END       // DW_AT_high_pc
 187
 188 .initByte 0x0   // end of compile unit children.
 189
 190 _picoMark_DEBUG_INFO_END=
 191
 192 //============================================================================
 193 // END OF DWARF
 194 //============================================================================
 195 .section .endFile
 196