// Copyright (C) 2008-2014 Free Software Foundation, Inc. // // This file is part of GCC. // // GCC is free software; you can redistribute it and/or modify it under // the terms of the GNU General Public License as published by the Free // Software Foundation; either version 3, or (at your option) any later // version. // // GCC is distributed in the hope that it will be useful, but WITHOUT ANY // WARRANTY; without even the implied warranty of MERCHANTABILITY or // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License // for more details. // // Under Section 7 of GPL version 3, you are granted additional // permissions described in the GCC Runtime Library Exception, version // 3.1, as published by the Free Software Foundation. // // You should have received a copy of the GNU General Public License and // a copy of the GCC Runtime Library Exception along with this program; // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see // . // picoChip ASM file //.file "clzsi2.S" .section .text .global __clzsi2 __clzsi2: _picoMark_FUNCTION_BEGIN= // picoChip Function Prologue : &__clzsi2 = 0 bytes // What value should be operated on? If the top word is empty // then count the bits in the bottom word, and add 16. If the // top word is not empty, then count the bits in the top word. // R4 stores the constant 0 sub.0 R1,0,r15 \ copy.1 16,r2 copyeq r0,r1 copyne 0,r2 // R1 now stores value to count, and R2 stores current bit offset. sbc r1,r0 asr.0 r1,15,r15 \ add.1 r0,1,r0 jr (lr) \ copyne 0,r0 =-> add.0 r0,r2,r0 _picoMark_FUNCTION_END= // picoChip Function Epilogue : __clzsi2 //============================================================================ // All DWARF information between this marker, and the END OF DWARF // marker should be included in the source file. Search for // FUNCTION_STACK_SIZE_GOES_HERE and FUNCTION NAME GOES HERE, and // provide the relevant information. Add markers called // _picoMark_FUNCTION_BEGIN and _picoMark_FUNCTION_END around the // function in question. //============================================================================ //============================================================================ // Frame information. //============================================================================ .section .debug_frame _picoMark_DebugFrame= // Common CIE header. .unalignedInitLong _picoMark_CieEnd-_picoMark_CieBegin _picoMark_CieBegin= .unalignedInitLong 0xffffffff .initByte 0x1 // CIE Version .ascii 16#0# // CIE Augmentation .uleb128 0x1 // CIE Code Alignment Factor .sleb128 2 // CIE Data Alignment Factor .initByte 0xc // CIE RA Column .initByte 0xc // DW_CFA_def_cfa .uleb128 0xd .uleb128 0x0 .align 2 _picoMark_CieEnd= // FDE _picoMark_LSFDE0I900821033007563= .unalignedInitLong _picoMark_FdeEnd-_picoMark_FdeBegin _picoMark_FdeBegin= .unalignedInitLong _picoMark_DebugFrame // FDE CIE offset .unalignedInitWord _picoMark_FUNCTION_BEGIN // FDE initial location .unalignedInitWord _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN .initByte 0xe // DW_CFA_def_cfa_offset .uleb128 0x0 // <-- FUNCTION_STACK_SIZE_GOES_HERE .initByte 0x4 // DW_CFA_advance_loc4 .unalignedInitLong _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN .initByte 0xe // DW_CFA_def_cfa_offset .uleb128 0x0 .align 2 _picoMark_FdeEnd= //============================================================================ // Abbrevation information. //============================================================================ .section .debug_abbrev _picoMark_ABBREVIATIONS= .section .debug_abbrev .uleb128 0x1 // (abbrev code) .uleb128 0x11 // (TAG: DW_TAG_compile_unit) .initByte 0x1 // DW_children_yes .uleb128 0x10 // (DW_AT_stmt_list) .uleb128 0x6 // (DW_FORM_data4) .uleb128 0x12 // (DW_AT_high_pc) .uleb128 0x1 // (DW_FORM_addr) .uleb128 0x11 // (DW_AT_low_pc) .uleb128 0x1 // (DW_FORM_addr) .uleb128 0x25 // (DW_AT_producer) .uleb128 0x8 // (DW_FORM_string) .uleb128 0x13 // (DW_AT_language) .uleb128 0x5 // (DW_FORM_data2) .uleb128 0x3 // (DW_AT_name) .uleb128 0x8 // (DW_FORM_string) .initByte 0x0 .initByte 0x0 .uleb128 0x2 ;# (abbrev code) .uleb128 0x2e ;# (TAG: DW_TAG_subprogram) .initByte 0x0 ;# DW_children_no .uleb128 0x3 ;# (DW_AT_name) .uleb128 0x8 ;# (DW_FORM_string) .uleb128 0x11 ;# (DW_AT_low_pc) .uleb128 0x1 ;# (DW_FORM_addr) .uleb128 0x12 ;# (DW_AT_high_pc) .uleb128 0x1 ;# (DW_FORM_addr) .initByte 0x0 .initByte 0x0 .initByte 0x0 //============================================================================ // Line information. DwarfLib requires this to be present, but it can // be empty. //============================================================================ .section .debug_line _picoMark_LINES= //============================================================================ // Debug Information //============================================================================ .section .debug_info //Fixed header. .unalignedInitLong _picoMark_DEBUG_INFO_END-_picoMark_DEBUG_INFO_BEGIN _picoMark_DEBUG_INFO_BEGIN= .unalignedInitWord 0x2 .unalignedInitLong _picoMark_ABBREVIATIONS .initByte 0x2 // Compile unit information. .uleb128 0x1 // (DIE 0xb) DW_TAG_compile_unit) .unalignedInitLong _picoMark_LINES .unalignedInitWord _picoMark_FUNCTION_END .unalignedInitWord _picoMark_FUNCTION_BEGIN // Producer is `picoChip' .ascii 16#70# 16#69# 16#63# 16#6f# 16#43# 16#68# 16#69# 16#70# 16#00# .unalignedInitWord 0xcafe // ASM language .ascii 16#0# // Name. DwarfLib expects this to be present. .uleb128 0x2 ;# (DIE DW_TAG_subprogram) // FUNCTION NAME GOES HERE. Use `echo name | od -t x1' to get the hex. Each hex // digit is specified using the format 16#XX# .ascii 16#5F# 16#63# 16#6C# 16#7A# 16#73# 16#69# 16#32# 16#0# // Function name `_clzsi2' .unalignedInitWord _picoMark_FUNCTION_BEGIN // DW_AT_low_pc .unalignedInitWord _picoMark_FUNCTION_END // DW_AT_high_pc .initByte 0x0 // end of compile unit children. _picoMark_DEBUG_INFO_END= //============================================================================ // END OF DWARF //============================================================================ .section .endFile // End of picoChip ASM file