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283 lines
8.6 KiB
ObjectPascal
283 lines
8.6 KiB
ObjectPascal
{
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Copyright (c) 1999-2009 by Florian Klaempfl and David Zhang
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This unit implements an asmoutput class for MIPS assembly syntax
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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****************************************************************************
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}
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unit cpugas;
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{$i fpcdefs.inc}
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interface
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uses
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cpubase, aasmbase, globtype, systems,
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aasmtai, aasmcpu, assemble, aggas;
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type
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TMIPSGNUAssembler = class(TGNUassembler)
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nomacro, noreorder, noat : boolean;
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constructor CreateWithWriter(info: pasminfo; wr: TExternalAssemblerOutputFile; freewriter, smart: boolean); override;
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{# Constructs the command line for calling the assembler }
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function MakeCmdLine: TCmdStr; override;
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end;
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TMIPSInstrWriter = class(TCPUInstrWriter)
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procedure WriteInstruction(hp : tai);override;
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end;
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const
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use_std_regnames : boolean =
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{$ifndef USE_MIPS_GAS_REGS}
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true;
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{$else}
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false;
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{$endif}
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implementation
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uses
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cutils, cpuinfo,
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globals, verbose, itcpugas, cgbase, cgutils;
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function asm_regname(reg : TRegister) : string;
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begin
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if use_std_regnames then
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asm_regname:='$'+std_regname(reg)
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else
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asm_regname:=gas_regname(reg);
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end;
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{****************************************************************************}
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{ GNU MIPS Assembler writer }
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{****************************************************************************}
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constructor TMIPSGNUAssembler.CreateWithWriter(info: pasminfo; wr: TExternalAssemblerOutputFile; freewriter, smart: boolean);
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begin
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inherited;
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InstrWriter:=TMIPSInstrWriter.create(self);
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nomacro:=false;
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noreorder:=false;
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noat:=false;
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end;
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function TMIPSGNUAssembler.MakeCmdLine: TCmdStr;
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begin
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result := Inherited MakeCmdLine;
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{ ABI selection }
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Replace(result,'$ABI','-mabi='+abitypestr[mips_abi]);
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{ ARCH selection }
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Replace(result,'$ARCH','-march='+lower(cputypestr[current_settings.cputype]));
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// Replace(result,'$ARCH','-march=pic32mx -mtune=pic32mx');
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end;
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{****************************************************************************}
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{ Helper routines for Instruction Writer }
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{****************************************************************************}
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function GetReferenceString(var ref: TReference): string;
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var
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reg: TRegister;
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regstr: string;
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begin
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result:='';
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if assigned(ref.symbol) then
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result:=ref.symbol.name;
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if (ref.offset<0) then
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result:=result+tostr(ref.offset)
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else if (ref.offset>0) then
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begin
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if assigned(ref.symbol) then
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result:=result+'+';
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result:=result+tostr(ref.offset);
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end
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{ asmreader appears to treat literal numbers as references }
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else if (ref.symbol=nil) and (ref.base=NR_NO) and (ref.index=NR_NO) then
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result:='0';
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{ either base or index may be present, but not both }
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reg:=ref.base;
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if (reg=NR_NO) then
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reg:=ref.index
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else if (ref.index<>NR_NO) then
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InternalError(2013013001);
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if (reg=NR_NO) then
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regstr:=''
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else
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regstr:='('+asm_regname(reg)+')';
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case ref.refaddr of
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addr_no,
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addr_full:
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if assigned(ref.symbol) and (reg<>NR_NO) then
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InternalError(2013013002)
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else
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begin
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result:=result+regstr;
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exit;
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end;
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addr_pic:
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result:='%got('+result;
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addr_high:
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result:='%hi('+result;
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addr_low:
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result:='%lo('+result;
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addr_pic_call16:
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result:='%call16('+result;
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addr_low_pic:
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result:='%got_lo('+result;
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addr_high_pic:
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result:='%got_hi('+result;
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addr_low_call:
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result:='%call_lo('+result;
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addr_high_call:
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result:='%call_hi('+result;
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else
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InternalError(2013013003);
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end;
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result:=result+')'+regstr;
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end;
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function getopstr(const Oper: TOper): string;
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begin
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with Oper do
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case typ of
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top_reg:
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getopstr := asm_regname(reg);
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top_const:
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getopstr := tostr(longint(val));
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top_ref:
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getopstr := getreferencestring(ref^);
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else
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internalerror(10001);
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end;
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end;
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procedure TMIPSInstrWriter.WriteInstruction(hp: Tai);
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var
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Op: TAsmOp;
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s: string;
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i: integer;
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begin
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if hp.typ <> ait_instruction then
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exit;
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op := taicpu(hp).opcode;
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case op of
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A_P_SET_NOMIPS16:
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begin
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owner.writer.AsmWriteLn(#9'.set'#9'nomips16');
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end;
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A_P_MASK,
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A_P_FMASK:
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begin
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s := #9 + gas_op2str[op] + #9'0x' + hexstr(taicpu(hp).oper[0]^.val,8)+ ',' + getopstr(taicpu(hp).oper[1]^) ;
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owner.writer.AsmWriteLn(s);
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end;
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A_P_SET_MACRO:
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begin
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owner.writer.AsmWriteLn(#9'.set'#9'macro');
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TMIPSGNUAssembler(owner).nomacro:=false;
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end;
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A_P_SET_REORDER:
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begin
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owner.writer.AsmWriteLn(#9'.set'#9'reorder');
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TMIPSGNUAssembler(owner).noreorder:=false;
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end;
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A_P_SET_NOMACRO:
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begin
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owner.writer.AsmWriteLn(#9'.set'#9'nomacro');
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TMIPSGNUAssembler(owner).nomacro:=true;
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end;
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A_P_SET_NOREORDER:
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begin
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owner.writer.AsmWriteLn(#9'.set'#9'noreorder');
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TMIPSGNUAssembler(owner).noreorder:=true;
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end;
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A_P_SET_NOAT:
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begin
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owner.writer.AsmWriteln(#9'.set'#9'noat');
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TMIPSGNUAssembler(owner).noat:=true;
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end;
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A_P_SET_AT:
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begin
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owner.writer.AsmWriteln(#9'.set'#9'at');
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TMIPSGNUAssembler(owner).noat:=false;
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end;
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else
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begin
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if taicpu(hp).is_macro and TMIPSGNUAssembler(owner).nomacro then
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owner.writer.AsmWriteln(#9'.set'#9'macro');
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s := #9 + gas_op2str[op] + cond2str[taicpu(hp).condition];
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if taicpu(hp).ops > 0 then
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begin
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s := s + #9 + getopstr(taicpu(hp).oper[0]^);
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for i := 1 to taicpu(hp).ops - 1 do
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s := s + ',' + getopstr(taicpu(hp).oper[i]^);
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end;
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owner.writer.AsmWriteLn(s);
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if taicpu(hp).is_macro and TMIPSGNUAssembler(owner).nomacro then
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owner.writer.AsmWriteln(#9'.set'#9'nomacro');
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end;
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end;
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end;
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const
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{$ifdef MIPSEL}
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as_MIPSEL_as_info: tasminfo =
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(
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id: as_gas;
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idtxt: 'AS';
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asmbin: 'as';
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asmcmd: '$ABI $ARCH $NOWARN -EL $PIC -o $OBJ $EXTRAOPT $ASM';
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supported_targets: [system_mipsel_linux,system_mipsel_android,system_mipsel_embedded];
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flags: [ af_needar, af_smartlink_sections];
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labelprefix: '.L';
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comment: '# ';
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dollarsign: '$';
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);
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{$else MIPSEL}
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as_MIPSEB_as_info: tasminfo =
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(
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id: as_gas;
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idtxt: 'AS';
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asmbin: 'as';
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asmcmd: '$ABI $ARCH $NOWARN -EB $PIC -o $OBJ $EXTRAOPT $ASM';
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supported_targets: [system_mipseb_linux];
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flags: [ af_needar, af_smartlink_sections];
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labelprefix: '.L';
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comment: '# ';
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dollarsign: '$';
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);
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{$endif MIPSEL}
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begin
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{$ifdef MIPSEL}
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RegisterAssembler(as_MIPSEL_as_info, TMIPSGNUAssembler);
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{$else MIPSEL}
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RegisterAssembler(as_MIPSEB_as_info, TMIPSGNUAssembler);
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{$endif MIPSEL}
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end.
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