gcc/config/picochip/libgccExtras/clzsi2.asm

   1 // Copyright (C) 2008 Free Software Foundation, Inc.
   2 //
   3 // This file is part of GCC.
   4 //
   5 // GCC is free software; you can redistribute it and/or modify it under
   6 // the terms of the GNU General Public License as published by the Free
   7 // Software Foundation; either version 3, or (at your option) any later
   8 // version.
   9 //
  10 // GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  11 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12 // FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13 // for more details.
  14 //
  15 // Under Section 7 of GPL version 3, you are granted additional
  16 // permissions described in the GCC Runtime Library Exception, version
  17 // 3.1, as published by the Free Software Foundation.
  18 //
  19 // You should have received a copy of the GNU General Public License and
  20 // a copy of the GCC Runtime Library Exception along with this program;
  21 // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  22 // <http://www.gnu.org/licenses/>.
  23
  24 // picoChip ASM file
  25 //.file "clzsi2.asm"
  26
  27 .section .text
  28
  29 .global __clzsi2
  30 __clzsi2:
  31 _picoMark_FUNCTION_BEGIN=
  32
  33 // picoChip Function Prologue : &__clzsi2 = 0 bytes
  34
  35         // What value should be operated on? If the top word is empty
  36         // then count the bits in the bottom word, and add 16. If the
  37         // top word is not empty, then count the bits in the top word.
  38
  39         // R4 stores the constant 0
  40
  41         sub.0 R1,0,r15 \ copy.1 16,r2
  42         copyeq r0,r1
  43         copyne 0,r2
  44
  45         // R1 now stores value to count, and R2 stores current bit offset.
  46         sbc r1,r0
  47         asr.0 r1,15,r15 \ add.1 r0,1,r0
  48         jr (lr) \ copyne 0,r0
  49 =->     add.0 r0,r2,r0
  50
  51 _picoMark_FUNCTION_END=
  52
  53 // picoChip Function Epilogue : __clzsi2
  54
  55 //============================================================================
  56 // All DWARF information between this marker, and the END OF DWARF
  57 // marker should be included in the source file. Search for
  58 // FUNCTION_STACK_SIZE_GOES_HERE and FUNCTION NAME GOES HERE, and
  59 // provide the relevent information. Add markers called
  60 // _picoMark_FUNCTION_BEGIN and _picoMark_FUNCTION_END around the
  61 // function in question.
  62 //============================================================================
  63
  64 //============================================================================
  65 // Frame information.
  66 //============================================================================
  67
  68 .section .debug_frame
  69 _picoMark_DebugFrame=
  70
  71 // Common CIE header.
  72 .unalignedInitLong _picoMark_CieEnd-_picoMark_CieBegin
  73 _picoMark_CieBegin=
  74 .unalignedInitLong 0xffffffff
  75 .initByte 0x1   // CIE Version
  76 .ascii 16#0#    // CIE Augmentation
  77 .uleb128 0x1    // CIE Code Alignment Factor
  78 .sleb128 2      // CIE Data Alignment Factor
  79 .initByte 0xc   // CIE RA Column
  80 .initByte 0xc   // DW_CFA_def_cfa
  81 .uleb128 0xd
  82 .uleb128 0x0
  83 .align 2
  84 _picoMark_CieEnd=
  85
  86 // FDE
  87 _picoMark_LSFDE0I900821033007563=
  88 .unalignedInitLong _picoMark_FdeEnd-_picoMark_FdeBegin
  89 _picoMark_FdeBegin=
  90 .unalignedInitLong _picoMark_DebugFrame // FDE CIE offset
  91 .unalignedInitWord _picoMark_FUNCTION_BEGIN     // FDE initial location
  92 .unalignedInitWord _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN
  93 .initByte 0xe   // DW_CFA_def_cfa_offset
  94 .uleb128 0x0    // <-- FUNCTION_STACK_SIZE_GOES_HERE
  95 .initByte 0x4   // DW_CFA_advance_loc4
  96 .unalignedInitLong _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN
  97 .initByte 0xe   // DW_CFA_def_cfa_offset
  98 .uleb128 0x0
  99 .align 2
 100 _picoMark_FdeEnd=
 101
 102 //============================================================================
 103 // Abbrevation information.
 104 //============================================================================
 105
 106 .section .debug_abbrev
 107 _picoMark_ABBREVIATIONS=
 108
 109 .section .debug_abbrev
 110         .uleb128 0x1    // (abbrev code)
 111         .uleb128 0x11   // (TAG: DW_TAG_compile_unit)
 112         .initByte 0x1   // DW_children_yes
 113         .uleb128 0x10   // (DW_AT_stmt_list)
 114         .uleb128 0x6    // (DW_FORM_data4)
 115         .uleb128 0x12   // (DW_AT_high_pc)
 116         .uleb128 0x1    // (DW_FORM_addr)
 117         .uleb128 0x11   // (DW_AT_low_pc)
 118         .uleb128 0x1    // (DW_FORM_addr)
 119         .uleb128 0x25   // (DW_AT_producer)
 120         .uleb128 0x8    // (DW_FORM_string)
 121         .uleb128 0x13   // (DW_AT_language)
 122         .uleb128 0x5    // (DW_FORM_data2)
 123         .uleb128 0x3    // (DW_AT_name)
 124         .uleb128 0x8    // (DW_FORM_string)
 125 .initByte 0x0
 126 .initByte 0x0
 127
 128         .uleb128 0x2    ;# (abbrev code)
 129         .uleb128 0x2e   ;# (TAG: DW_TAG_subprogram)
 130 .initByte 0x0   ;# DW_children_no
 131         .uleb128 0x3    ;# (DW_AT_name)
 132         .uleb128 0x8    ;# (DW_FORM_string)
 133         .uleb128 0x11   ;# (DW_AT_low_pc)
 134         .uleb128 0x1    ;# (DW_FORM_addr)
 135         .uleb128 0x12   ;# (DW_AT_high_pc)
 136         .uleb128 0x1    ;# (DW_FORM_addr)
 137 .initByte 0x0
 138 .initByte 0x0
 139
 140 .initByte 0x0
 141
 142 //============================================================================
 143 // Line information. DwarfLib requires this to be present, but it can
 144 // be empty.
 145 //============================================================================
 146
 147 .section .debug_line
 148 _picoMark_LINES=
 149
 150 //============================================================================
 151 // Debug Information
 152 //============================================================================
 153 .section .debug_info
 154
 155 //Fixed header.
 156 .unalignedInitLong _picoMark_DEBUG_INFO_END-_picoMark_DEBUG_INFO_BEGIN
 157 _picoMark_DEBUG_INFO_BEGIN=
 158 .unalignedInitWord 0x2
 159 .unalignedInitLong _picoMark_ABBREVIATIONS
 160 .initByte 0x2
 161
 162 // Compile unit information.
 163 .uleb128 0x1    // (DIE 0xb) DW_TAG_compile_unit)
 164 .unalignedInitLong _picoMark_LINES
 165 .unalignedInitWord _picoMark_FUNCTION_END
 166 .unalignedInitWord _picoMark_FUNCTION_BEGIN
 167 // Producer is `picoChip'
 168 .ascii 16#70# 16#69# 16#63# 16#6f# 16#43# 16#68# 16#69# 16#70# 16#00#
 169 .unalignedInitWord 0xcafe // ASM language
 170 .ascii 16#0# // Name. DwarfLib expects this to be present.
 171
 172 .uleb128 0x2    ;# (DIE DW_TAG_subprogram)
 173
 174 // FUNCTION NAME GOES HERE. Use `echo name | od -t x1' to get the hex. Each hex
 175 // digit is specified using the format 16#XX#
 176 .ascii 16#5F# 16#63# 16#6C# 16#7A# 16#73# 16#69# 16#32# 16#0# // Function name `_clzsi2'
 177 .unalignedInitWord _picoMark_FUNCTION_BEGIN     // DW_AT_low_pc
 178 .unalignedInitWord _picoMark_FUNCTION_END       // DW_AT_high_pc
 179
 180 .initByte 0x0   // end of compile unit children.
 181
 182 _picoMark_DEBUG_INFO_END=
 183
 184 //============================================================================
 185 // END OF DWARF
 186 //============================================================================
 187
 188 .section .endFile
 189 // End of picoChip ASM file