192 lines
6.3 KiB
ArmAsm
192 lines
6.3 KiB
ArmAsm
// picoChip ASM file
|
|
//
|
|
// Support for 64-bit subtraction.
|
|
//
|
|
// Copyright (C) 2003-2014 Free Software Foundation, Inc.
|
|
// Contributed by Picochip Ltd.
|
|
// Maintained by Hariharan Sandanagobalane (hariharan@picochip.com)
|
|
//
|
|
// This file 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.
|
|
//
|
|
// This file 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
|
|
// <http://www.gnu.org/licenses/>.
|
|
|
|
.section .text
|
|
|
|
.align 8
|
|
.global __subdi3
|
|
__subdi3:
|
|
|
|
_picoMark_FUNCTION_BEGIN=
|
|
// picoChip Function Prologue : &__subdi3 = 4 bytes
|
|
|
|
// The first operand of sub is completely in registers r[2-5]
|
|
// The second operand of sub is in stack FP(0-3)
|
|
// and result need to be written pointed to by the register r0.
|
|
// All we need to do is to load the appropriate values, sub them
|
|
// appropriately (with sub or subb) and then store the values back.
|
|
ldw (FP)0, r1
|
|
stl r[7:6], (FP)-1
|
|
sub.0 r2, r1, r6
|
|
ldw (FP)1, r1
|
|
subb.0 r3, r1, r7
|
|
ldl (FP)1, r[3:2]
|
|
stl r[7:6], (r0)0
|
|
subb.0 r4, r2, r6
|
|
subb.0 r5, r3, r7
|
|
stl r[7:6], (r0)1
|
|
jr (r12)
|
|
=-> ldl (FP)2, r[7:6]
|
|
|
|
_picoMark_FUNCTION_END=
|
|
// picoChip Function Epilogue : __subdi3
|
|
|
|
//============================================================================
|
|
// 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 0x4 // <-- 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#73# 16#75# 16#62# 16#64# 16#69# 16#33# 16#0# // Function name `_subdi3'
|
|
.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
|
|
|