Subversion Repositories openrisc_me

// picoChip ASM file
//
//   Support for 32-bit arithmetic shift right.
//
//   Copyright (C) 2003, 2004, 2005, 2008, 2009  Free Software Foundation, Inc.
//   Contributed by picoChip Designs 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

.global ___ashrsi3
___ashrsi3:
_picoMark_FUNCTION_BEGIN=

// picoChip Function Prologue : &___ashrsi3 = 0 bytes

        // if (R2 > 15) goto _L2
        SUB.0 15,R2,r15
        JMPLT _L2
=->     COPY.0 R1,R3

        LSR.0 R1,R2,R1 // R1 := R1 >> R2
        // if (R2 == 0) goto _L4
        SUB.0 R2,0,r15
        JMPEQ _L4
=->     LSR.0 R0,R2,R0 // R2 := R0 >> R2

        SUB.0 16,R2,R4 // R4 := R4 - R2 (HI)
        ASR.0 R3,15,R5  // R5 = R1 >>{arith} 15
        LSL.0 R5,R4,R5 // R5 := R5 << R4
        LSL.0 R3,R4,R4 // R4 := R1 << R4
        OR.0 R5,R1,R1 // R3 := R5 IOR R3 (HI)
        BRA _L4
        =->     OR.0 R4,R0,R0 // R2 := R4 IOR R0 (HI)
_L2:
        ASR.0 R1,15,R1  // R4 = R1 >>{arith} 15
        SUB.0 16,R2,R5  // R5 := R5 - R2 (HI)
        LSR.0 R3,R2,R0 // R2 := R1 >> R2
        LSL.0 R1,R5,R5 // R5 := R4 << R5
        OR.0 R5,R0,R5 // R2 := R5 IOR R2 (HI)
        SUB.0 R2,16,r15  // R5 := R5 - R2 (HI)
        COPYNE R5,R0
_L4:
        JR (R12)        // Return to caller 

_picoMark_FUNCTION_END=

// picoChip Function Epilogue : __ashrsi3
//============================================================================
// 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 relevent 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#61# 16#73# 16#68# 16#72# 16#73# 16#69# 16#33# 16#0# // Function name `_ashrsi3'
.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