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Diffstat (limited to 'riscv/trunk/compiler/riscv32/rarv32gas.pas')
| -rw-r--r-- | riscv/trunk/compiler/riscv32/rarv32gas.pas | 662 |
1 files changed, 662 insertions, 0 deletions
diff --git a/riscv/trunk/compiler/riscv32/rarv32gas.pas b/riscv/trunk/compiler/riscv32/rarv32gas.pas new file mode 100644 index 0000000000..a1263f9383 --- /dev/null +++ b/riscv/trunk/compiler/riscv32/rarv32gas.pas @@ -0,0 +1,662 @@ +{ + Copyright (c) 1998-2002 by Carl Eric Codere and Peter Vreman + + Does the parsing for the Risc-V32 GNU AS styled inline assembler. + + This program 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 2 of the License, or + (at your option) any later version. + + This program 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. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + + **************************************************************************** +} +Unit rarv32gas; + +{$i fpcdefs.inc} + + Interface + + uses + raatt,rarv32; + + type + trv32attreader = class(tattreader) + function is_asmopcode(const s: string):boolean;override; + procedure handleopcode;override; + procedure BuildReference(oper : trvoperand); + procedure BuildOperand(oper : trvoperand); + procedure BuildOpCode(instr : trvinstruction); + procedure ReadAt(oper : trvoperand); + procedure ReadSym(oper : trvoperand); + end; + + + Implementation + + uses + { helpers } + cutils, + { global } + globtype,globals,verbose, + systems, + { aasm } + cpubase,aasmbase,aasmtai,aasmdata,aasmcpu, + { symtable } + symconst,symsym, + { parser } + procinfo, + rabase,rautils, + cgbase,cgobj,cgrv + ; + + procedure trv32attreader.ReadSym(oper : trvoperand); + var + tempstr, mangledname : string; + typesize,l,k : aint; + begin + tempstr:=actasmpattern; + Consume(AS_ID); + { typecasting? } + if (actasmtoken=AS_LPAREN) and + SearchType(tempstr,typesize) then + begin + oper.hastype:=true; + Consume(AS_LPAREN); + BuildOperand(oper); + Consume(AS_RPAREN); + if oper.opr.typ in [OPR_REFERENCE,OPR_LOCAL] then + oper.SetSize(typesize,true); + end + else + if not oper.SetupVar(tempstr,false) then + Message1(sym_e_unknown_id,tempstr); + { record.field ? } + if actasmtoken=AS_DOT then + begin + BuildRecordOffsetSize(tempstr,l,k,mangledname,false); + if (mangledname<>'') then + Message(asmr_e_invalid_reference_syntax); + inc(oper.opr.ref.offset,l); + end; + end; + + + procedure trv32attreader.ReadAt(oper : trvoperand); + begin + { check for ...@ } + if actasmtoken=AS_AT then + begin + if (oper.opr.ref.symbol=nil) and + (oper.opr.ref.offset = 0) then + Message(asmr_e_invalid_reference_syntax); + Consume(AS_AT); + if actasmtoken=AS_ID then + begin + {if upper(actasmpattern)='L' then + oper.opr.ref.refaddr:=addr_low + else if upper(actasmpattern)='HI' then + oper.opr.ref.refaddr:=addr_high + else if upper(actasmpattern)='HA' then + oper.opr.ref.refaddr:=addr_higha + else} + Message(asmr_e_invalid_reference_syntax); + Consume(AS_ID); + end + else + Message(asmr_e_invalid_reference_syntax); + end; + end; + + + Procedure trv32attreader.BuildReference(oper : trvoperand); + + procedure Consume_RParen; + begin + if actasmtoken <> AS_RPAREN then + Begin + Message(asmr_e_invalid_reference_syntax); + RecoverConsume(true); + end + else + begin + Consume(AS_RPAREN); + if not (actasmtoken in [AS_COMMA,AS_SEPARATOR,AS_END]) then + Begin + Message(asmr_e_invalid_reference_syntax); + RecoverConsume(true); + end; + end; + end; + + var + l : aint; + relsym: string; + asmsymtyp: tasmsymtype; + isflags: tindsymflags; + + begin + Consume(AS_LPAREN); + Case actasmtoken of + AS_INTNUM, + AS_MINUS, + AS_PLUS: + Begin + { offset(offset) is invalid } + If oper.opr.Ref.Offset <> 0 Then + Begin + Message(asmr_e_invalid_reference_syntax); + RecoverConsume(true); + End + Else + Begin + oper.opr.Ref.Offset:=BuildConstExpression(false,true); + Consume(AS_RPAREN); + if actasmtoken=AS_AT then + ReadAt(oper); + end; + exit; + End; + AS_REGISTER: { (reg ... } + Begin + if ((oper.opr.typ=OPR_REFERENCE) and (oper.opr.ref.base<>NR_NO)) or + ((oper.opr.typ=OPR_LOCAL) and (oper.opr.localsym.localloc.loc<>LOC_REGISTER)) then + message(asmr_e_cannot_index_relative_var); + oper.opr.ref.base:=actasmregister; + Consume(AS_REGISTER); + Consume_RParen; + end; {end case } + AS_ID: + Begin + ReadSym(oper); + case actasmtoken of + AS_PLUS: + begin + { add a constant expression? } + l:=BuildConstExpression(true,true); + case oper.opr.typ of + OPR_CONSTANT : + inc(oper.opr.val,l); + OPR_LOCAL : + inc(oper.opr.localsymofs,l); + OPR_REFERENCE : + inc(oper.opr.ref.offset,l); + else + internalerror(200309202); + end; + end; + AS_MINUS: + begin + Consume(AS_MINUS); + BuildConstSymbolExpression(false,true,false,l,relsym,asmsymtyp); + if (relsym<>'') then + begin + if (oper.opr.typ = OPR_REFERENCE) then + oper.opr.ref.relsymbol:=current_asmdata.RefAsmSymbol(relsym) + else + begin + Message(asmr_e_invalid_reference_syntax); + RecoverConsume(false); + end + end + else + begin + case oper.opr.typ of + OPR_CONSTANT : + dec(oper.opr.val,l); + OPR_LOCAL : + dec(oper.opr.localsymofs,l); + OPR_REFERENCE : + dec(oper.opr.ref.offset,l); + else + internalerror(2007092601); + end; + end; + end; + end; + Consume(AS_RPAREN); + if actasmtoken=AS_AT then + ReadAt(oper); + End; + AS_COMMA: { (, ... can either be scaling, or index } + Begin + Consume(AS_COMMA); + { Index } + if (actasmtoken=AS_REGISTER) then + Begin + oper.opr.ref.index:=actasmregister; + Consume(AS_REGISTER); + { check for scaling ... } + Consume_RParen; + end + else + begin + Message(asmr_e_invalid_reference_syntax); + RecoverConsume(false); + end; + end; + else + Begin + Message(asmr_e_invalid_reference_syntax); + RecoverConsume(false); + end; + end; + end; + + + Procedure trv32attreader.BuildOperand(oper : trvoperand); + var + expr : string; + typesize,l : aint; + + + procedure AddLabelOperand(hl:tasmlabel); + begin + if not(actasmtoken in [AS_PLUS,AS_MINUS,AS_LPAREN]) and + is_calljmp(actopcode) then + begin + oper.opr.typ:=OPR_SYMBOL; + oper.opr.symbol:=hl; + end + else + begin + oper.InitRef; + oper.opr.ref.symbol:=hl; + end; + end; + + + procedure MaybeRecordOffset; + var + mangledname: string; + hasdot : boolean; + l, + toffset, + tsize : aint; + begin + if not(actasmtoken in [AS_DOT,AS_PLUS,AS_MINUS]) then + exit; + l:=0; + hasdot:=(actasmtoken=AS_DOT); + if hasdot then + begin + if expr<>'' then + begin + BuildRecordOffsetSize(expr,toffset,tsize,mangledname,false); + if (oper.opr.typ<>OPR_CONSTANT) and + (mangledname<>'') then + Message(asmr_e_wrong_sym_type); + inc(l,toffset); + oper.SetSize(tsize,true); + end; + end; + if actasmtoken in [AS_PLUS,AS_MINUS] then + inc(l,BuildConstExpression(true,false)); + case oper.opr.typ of + OPR_LOCAL : + begin + { don't allow direct access to fields of parameters, because that + will generate buggy code. Allow it only for explicit typecasting } + if hasdot and + (not oper.hastype) and + (tabstractvarsym(oper.opr.localsym).owner.symtabletype=parasymtable) and + (current_procinfo.procdef.proccalloption<>pocall_register) then + Message(asmr_e_cannot_access_field_directly_for_parameters); + inc(oper.opr.localsymofs,l) + end; + OPR_CONSTANT : + if (mangledname<>'') then + begin + if (oper.opr.val<>0) then + Message(asmr_e_wrong_sym_type); + oper.opr.typ:=OPR_SYMBOL; + oper.opr.symbol:=current_asmdata.DefineAsmSymbol(mangledname,AB_EXTERNAL,AT_FUNCTION); + end + else + inc(oper.opr.val,l); + OPR_REFERENCE : + inc(oper.opr.ref.offset,l); + OPR_SYMBOL: + Message(asmr_e_invalid_symbol_ref); + else + internalerror(200309221); + end; + end; + + + function MaybeBuildReference:boolean; + { Try to create a reference, if not a reference is found then false + is returned } + begin + MaybeBuildReference:=true; + case actasmtoken of + AS_INTNUM, + AS_MINUS, + AS_PLUS: + Begin + oper.opr.ref.offset:=BuildConstExpression(True,False); + if actasmtoken<>AS_LPAREN then + Message(asmr_e_invalid_reference_syntax) + else + BuildReference(oper); + end; + AS_LPAREN: + BuildReference(oper); + AS_ID: { only a variable is allowed ... } + Begin + ReadSym(oper); + case actasmtoken of + AS_END, + AS_SEPARATOR, + AS_COMMA: ; + AS_LPAREN: + BuildReference(oper); + else + Begin + Message(asmr_e_invalid_reference_syntax); + Consume(actasmtoken); + end; + end; {end case } + end; + else + MaybeBuildReference:=false; + end; { end case } + end; + + + var + tempreg : tregister; + hl : tasmlabel; + ofs : aint; + Begin + expr:=''; + case actasmtoken of + AS_LPAREN: { Memory reference or constant expression } + Begin + oper.InitRef; + BuildReference(oper); + end; + + AS_INTNUM, + AS_MINUS, + AS_PLUS: + Begin + { Constant memory offset } + { This must absolutely be followed by ( } + oper.InitRef; + oper.opr.ref.offset:=BuildConstExpression(True,False); + if actasmtoken<>AS_LPAREN then + begin + ofs:=oper.opr.ref.offset; + BuildConstantOperand(oper); + inc(oper.opr.val,ofs); + end + else + BuildReference(oper); + end; + + AS_ID: { A constant expression, or a Variable ref. } + Begin + { Local Label ? } + if is_locallabel(actasmpattern) then + begin + CreateLocalLabel(actasmpattern,hl,false); + Consume(AS_ID); + AddLabelOperand(hl); + end + else + { Check for label } + if SearchLabel(actasmpattern,hl,false) then + begin + Consume(AS_ID); + AddLabelOperand(hl); + end + else + { probably a variable or normal expression } + { or a procedure (such as in CALL ID) } + Begin + { is it a constant ? } + if SearchIConstant(actasmpattern,l) then + Begin + if not (oper.opr.typ in [OPR_NONE,OPR_CONSTANT]) then + Message(asmr_e_invalid_operand_type); + BuildConstantOperand(oper); + end + else + begin + expr:=actasmpattern; + Consume(AS_ID); + { typecasting? } + if (actasmtoken=AS_LPAREN) and + SearchType(expr,typesize) then + begin + oper.hastype:=true; + Consume(AS_LPAREN); + BuildOperand(oper); + Consume(AS_RPAREN); + if oper.opr.typ in [OPR_REFERENCE,OPR_LOCAL] then + oper.SetSize(typesize,true); + end + else + begin + if oper.SetupVar(expr,false) then + ReadAt(oper) + else + Begin + { look for special symbols ... } + if expr= '__HIGH' then + begin + consume(AS_LPAREN); + if not oper.setupvar('high'+actasmpattern,false) then + Message1(sym_e_unknown_id,'high'+actasmpattern); + consume(AS_ID); + consume(AS_RPAREN); + end + else + if expr = '__RESULT' then + oper.SetUpResult + else + if expr = '__SELF' then + oper.SetupSelf + else + if expr = '__OLDEBP' then + oper.SetupOldEBP + else + Message1(sym_e_unknown_id,expr); + end; + end; + end; + if actasmtoken=AS_DOT then + MaybeRecordOffset; + { add a constant expression? } + if (actasmtoken=AS_PLUS) then + begin + l:=BuildConstExpression(true,false); + case oper.opr.typ of + OPR_CONSTANT : + inc(oper.opr.val,l); + OPR_LOCAL : + inc(oper.opr.localsymofs,l); + OPR_REFERENCE : + inc(oper.opr.ref.offset,l); + else + internalerror(200309202); + end; + end + end; + { Do we have a indexing reference, then parse it also } + if actasmtoken=AS_LPAREN then + BuildReference(oper); + end; + + AS_REGISTER: { Register, a variable reference or a constant reference } + Begin + { save the type of register used. } + tempreg:=actasmregister; + Consume(AS_REGISTER); + if (actasmtoken in [AS_END,AS_SEPARATOR,AS_COMMA]) then + begin + if not (oper.opr.typ in [OPR_NONE,OPR_REGISTER]) then + Message(asmr_e_invalid_operand_type); + oper.opr.typ:=OPR_REGISTER; + oper.opr.reg:=tempreg; + end + else + Message(asmr_e_syn_operand); + end; + AS_END, + AS_SEPARATOR, + AS_COMMA: ; + else + Begin + Message(asmr_e_syn_operand); + Consume(actasmtoken); + end; + end; { end case } + end; + + +{***************************************************************************** + trv32attreader +*****************************************************************************} + + procedure trv32attreader.BuildOpCode(instr : trvinstruction); + var + operandnum : longint; + Begin + { opcode } + if (actasmtoken<>AS_OPCODE) then + Begin + Message(asmr_e_invalid_or_missing_opcode); + RecoverConsume(true); + exit; + end; + { Fill the instr object with the current state } + with instr do + begin + Opcode:=ActOpcode; + condition:=ActCondition; + end; + + { We are reading operands, so opcode will be an AS_ID } + operandnum:=1; + Consume(AS_OPCODE); + { Zero operand opcode ? } + if actasmtoken in [AS_SEPARATOR,AS_END] then + begin + operandnum:=0; + exit; + end; + { Read the operands } + repeat + case actasmtoken of + AS_COMMA: { Operand delimiter } + Begin + if operandnum>Max_Operands then + Message(asmr_e_too_many_operands) + else + begin + { condition operands doesn't set the operand but write to the + condition field of the instruction + } + if instr.Operands[operandnum].opr.typ<>OPR_NONE then + Inc(operandnum); + end; + Consume(AS_COMMA); + end; + AS_SEPARATOR, + AS_END : { End of asm operands for this opcode } + begin + break; + end; + else + BuildOperand(instr.Operands[operandnum] as trvoperand); + end; { end case } + until false; + if (operandnum=1) and (instr.Operands[operandnum].opr.typ=OPR_NONE) then + dec(operandnum); + instr.Ops:=operandnum; + end; + + + function trv32attreader.is_asmopcode(const s: string):boolean; + var + cond : tasmcond; + hs : string; + + Begin + { making s a value parameter would break other assembler readers } + hs:=s; + is_asmopcode:=false; + + { clear op code } + actopcode:=A_None; + { clear condition } + fillchar(actcondition,sizeof(actcondition),0); + + { check for direction hint } + actopcode := tasmop(ptruint(iasmops.find(hs))); + if actopcode <> A_NONE then + begin + actasmtoken:=AS_OPCODE; + is_asmopcode:=true; + exit; + end; + { not found, check branch instructions } + if hs[1]='B' then + begin + { we can search here without an extra table which is sorted by string length + because we take the whole remaining string without the leading B } + actopcode := A_Bxx; + for cond:=low(TAsmCond) to high(TAsmCond) do + if copy(hs,2,length(s)-1)=uppercond2str[cond] then + begin + actcondition:=cond; + actasmtoken:=AS_OPCODE; + is_asmopcode:=true; + exit; + end; + end; + end; + + + procedure trv32attreader.handleopcode; + var + instr : trvinstruction; + begin + instr:=trvinstruction.Create(trvoperand); + BuildOpcode(instr); + instr.condition := actcondition; + { + instr.AddReferenceSizes; + instr.SetInstructionOpsize; + instr.CheckOperandSizes; + } + instr.ConcatInstruction(curlist); + instr.Free; + end; + + +{***************************************************************************** + Initialize +*****************************************************************************} + +const + asmmode_rv32_standard_info : tasmmodeinfo = + ( + id : asmmode_standard; + idtxt : 'STANDARD'; + casmreader : trv32attreader; + ); + +initialization + RegisterAsmMode(asmmode_rv32_standard_info); +end. |