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608 lines
19 KiB
ObjectPascal
608 lines
19 KiB
ObjectPascal
{
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Copyright (c) 1999-2002 by Jonas Maebe and Thomas Schatzl
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Contains the assembler object for the PowerPC 32 and PowerPC 64
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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 aasmcpu;
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{$i fpcdefs.inc}
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interface
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uses
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globtype,verbose,
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aasmbase,aasmtai,aasmdata,aasmsym,
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cpubase,cgbase,cgutils;
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const
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{ "mov reg,reg" source operand number }
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O_MOV_SOURCE = 1;
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{ "mov reg,reg" source operand number }
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O_MOV_DEST = 0;
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type
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taicpu = class(tai_cpu_abstract_sym)
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constructor op_none(op : tasmop);
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constructor op_reg(op : tasmop;_op1 : tregister);
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constructor op_const(op : tasmop;_op1 : aint);
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constructor op_reg_reg(op : tasmop;_op1,_op2 : tregister);
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constructor op_reg_ref(op : tasmop;_op1 : tregister;const _op2 : treference);
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constructor op_reg_const(op:tasmop; _op1: tregister; _op2: aint);
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constructor op_const_reg(op:tasmop; _op1: aint; _op2: tregister);
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constructor op_const_const(op : tasmop;_op1,_op2 : aint);
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constructor op_reg_reg_const_const(op: tasmop; _op1, _op2: tregister; _op3, _op4: aint);
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constructor op_reg_reg_reg(op : tasmop;_op1,_op2,_op3 : tregister);
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constructor op_reg_reg_const(op : tasmop;_op1,_op2 : tregister; _op3: aint);
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constructor op_reg_reg_sym_ofs(op : tasmop;_op1,_op2 : tregister; _op3: tasmsymbol;_op3ofs: aint);
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constructor op_reg_reg_ref(op : tasmop;_op1,_op2 : tregister; const _op3: treference);
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constructor op_const_reg_reg(op : tasmop;_op1 : aint;_op2, _op3 : tregister);
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constructor op_const_reg_const(op : tasmop;_op1 : aint;_op2 : tregister;_op3 : aint);
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constructor op_const_const_const(op : tasmop;_op1 : aint;_op2 : aint;_op3 : aint);
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constructor op_reg_reg_reg_reg(op : tasmop;_op1,_op2,_op3,_op4 : tregister);
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constructor op_reg_bool_reg_reg(op : tasmop;_op1: tregister;_op2:boolean;_op3,_op4:tregister);
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constructor op_reg_bool_reg_const(op : tasmop;_op1: tregister;_op2:boolean;_op3:tregister;_op4: aint);
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constructor op_reg_reg_reg_const(op : tasmop; _op1, _op2, _op3 : tregister; _op4 : aint);
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constructor op_reg_reg_reg_const_const(op : tasmop;_op1,_op2,_op3 : tregister;_op4,_op5 : aint);
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constructor op_reg_reg_const_const_const(op : tasmop;_op1,_op2 : tregister;_op3,_op4,_op5 : aint);
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{ this is for Jmp instructions }
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constructor op_cond_sym(op : tasmop;cond:TAsmCond;_op1 : tasmsymbol);
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constructor op_const_const_sym(op : tasmop;_op1,_op2 : aint;_op3: tasmsymbol);
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constructor op_sym(op : tasmop;_op1 : tasmsymbol);
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constructor op_sym_ofs(op : tasmop;_op1 : tasmsymbol;_op1ofs:aint);
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constructor op_reg_sym_ofs(op : tasmop;_op1 : tregister;_op2:tasmsymbol;_op2ofs : aint);
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constructor op_sym_ofs_ref(op : tasmop;_op1 : tasmsymbol;_op1ofs:aint;const _op2 : treference);
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procedure loadbool(opidx:aint;_b:boolean);
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function is_same_reg_move(regtype: Tregistertype):boolean; override;
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{ register spilling code }
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function spilling_get_operation_type(opnr: longint): topertype;override;
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function spilling_get_operation_type_ref(opnr: longint; reg: tregister): topertype;override;
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end;
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tai_align = class(tai_align_abstract)
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{ nothing to add }
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end;
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procedure InitAsm;
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procedure DoneAsm;
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function spilling_create_load(const ref:treference;r:tregister):Taicpu;
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function spilling_create_store(r:tregister; const ref:treference):Taicpu;
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procedure fixup_jmps(list: TAsmList);
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implementation
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uses cutils, cclasses;
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{*****************************************************************************
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taicpu Constructors
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*****************************************************************************}
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procedure taicpu.loadbool(opidx:aint;_b:boolean);
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begin
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if opidx>=ops then
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ops:=opidx+1;
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with oper[opidx]^ do
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begin
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if typ=top_ref then
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dispose(ref);
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b:=_b;
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typ:=top_bool;
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end;
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end;
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constructor taicpu.op_none(op : tasmop);
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begin
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inherited create(op);
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end;
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constructor taicpu.op_reg(op : tasmop;_op1 : tregister);
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begin
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inherited create(op);
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ops:=1;
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loadreg(0,_op1);
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end;
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constructor taicpu.op_const(op : tasmop;_op1 : aint);
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begin
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inherited create(op);
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ops:=1;
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loadconst(0,_op1);
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end;
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constructor taicpu.op_reg_reg(op : tasmop;_op1,_op2 : tregister);
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begin
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inherited create(op);
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ops:=2;
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loadreg(0,_op1);
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loadreg(1,_op2);
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end;
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constructor taicpu.op_reg_const(op:tasmop; _op1: tregister; _op2: aint);
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begin
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inherited create(op);
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ops:=2;
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loadreg(0,_op1);
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loadconst(1,_op2);
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end;
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constructor taicpu.op_const_reg(op:tasmop; _op1: aint; _op2: tregister);
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begin
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inherited create(op);
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ops:=2;
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loadconst(0,_op1);
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loadreg(1,_op2);
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end;
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constructor taicpu.op_reg_ref(op : tasmop;_op1 : tregister;const _op2 : treference);
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begin
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inherited create(op);
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ops:=2;
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loadreg(0,_op1);
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loadref(1,_op2);
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end;
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constructor taicpu.op_const_const(op : tasmop;_op1,_op2 : aint);
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begin
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inherited create(op);
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ops:=2;
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loadconst(0,_op1);
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loadconst(1,_op2);
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end;
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constructor taicpu.op_reg_reg_const_const(op: tasmop; _op1, _op2: tregister; _op3, _op4: aint);
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begin
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inherited create(op);
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ops := 4;
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loadreg(0, _op1);
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loadreg(1, _op2);
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loadconst(2, _op3);
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loadconst(3, _op4);
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end;
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constructor taicpu.op_reg_reg_reg(op : tasmop;_op1,_op2,_op3 : tregister);
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begin
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inherited create(op);
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ops:=3;
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loadreg(0,_op1);
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loadreg(1,_op2);
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loadreg(2,_op3);
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end;
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constructor taicpu.op_reg_reg_const(op : tasmop;_op1,_op2 : tregister; _op3: aint);
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begin
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inherited create(op);
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ops:=3;
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loadreg(0,_op1);
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loadreg(1,_op2);
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loadconst(2,_op3);
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end;
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constructor taicpu.op_reg_reg_sym_ofs(op : tasmop;_op1,_op2 : tregister; _op3: tasmsymbol;_op3ofs: aint);
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begin
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inherited create(op);
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ops:=3;
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loadreg(0,_op1);
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loadreg(1,_op2);
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loadsymbol(0,_op3,_op3ofs);
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end;
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constructor taicpu.op_reg_reg_ref(op : tasmop;_op1,_op2 : tregister; const _op3: treference);
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begin
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inherited create(op);
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ops:=3;
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loadreg(0,_op1);
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loadreg(1,_op2);
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loadref(2,_op3);
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end;
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constructor taicpu.op_const_reg_reg(op : tasmop;_op1 : aint;_op2, _op3 : tregister);
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begin
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inherited create(op);
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ops:=3;
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loadconst(0,_op1);
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loadreg(1,_op2);
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loadreg(2,_op3);
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end;
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constructor taicpu.op_const_reg_const(op : tasmop;_op1 : aint;_op2 : tregister;_op3 : aint);
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begin
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inherited create(op);
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ops:=3;
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loadconst(0,_op1);
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loadreg(1,_op2);
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loadconst(2,_op3);
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end;
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constructor taicpu.op_const_const_const(op : tasmop;_op1 : aint;_op2 : aint;_op3 : aint);
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begin
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inherited create(op);
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ops:=3;
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loadconst(0,_op1);
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loadconst(1,_op2);
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loadconst(2,_op3);
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end;
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constructor taicpu.op_reg_reg_reg_reg(op : tasmop;_op1,_op2,_op3,_op4 : tregister);
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begin
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inherited create(op);
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ops:=4;
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loadreg(0,_op1);
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loadreg(1,_op2);
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loadreg(2,_op3);
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loadreg(3,_op4);
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end;
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constructor taicpu.op_reg_bool_reg_reg(op : tasmop;_op1: tregister;_op2:boolean;_op3,_op4:tregister);
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begin
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inherited create(op);
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ops:=4;
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loadreg(0,_op1);
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loadbool(1,_op2);
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loadreg(2,_op3);
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loadreg(3,_op4);
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end;
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constructor taicpu.op_reg_bool_reg_const(op : tasmop;_op1: tregister;_op2:boolean;_op3:tregister;_op4: aint);
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begin
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inherited create(op);
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ops:=4;
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loadreg(0,_op1);
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loadbool(0,_op2);
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loadreg(0,_op3);
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loadconst(0,cardinal(_op4));
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end;
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constructor taicpu.op_reg_reg_reg_const(op : tasmop; _op1, _op2, _op3 : tregister; _op4 : aint);
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begin
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inherited create(op);
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ops := 4;
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loadreg(0, _op1);
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loadreg(1, _op2);
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loadreg(2, _op3);
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loadconst(3, cardinal(_op4));
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end;
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constructor taicpu.op_reg_reg_reg_const_const(op : tasmop;_op1,_op2,_op3 : tregister;_op4,_op5 : aint);
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begin
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inherited create(op);
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ops:=5;
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loadreg(0,_op1);
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loadreg(1,_op2);
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loadreg(2,_op3);
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loadconst(3,cardinal(_op4));
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loadconst(4,cardinal(_op5));
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end;
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constructor taicpu.op_reg_reg_const_const_const(op : tasmop;_op1,_op2 : tregister;_op3,_op4,_op5 : aint);
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begin
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inherited create(op);
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ops:=5;
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loadreg(0,_op1);
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loadreg(1,_op2);
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loadconst(2,_op3);
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loadconst(3,_op4);
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loadconst(4,_op5);
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end;
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constructor taicpu.op_cond_sym(op : tasmop;cond:TAsmCond;_op1 : tasmsymbol);
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begin
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inherited create(op);
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condition:=cond;
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ops:=1;
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loadsymbol(0,_op1,0);
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end;
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constructor taicpu.op_const_const_sym(op : tasmop;_op1,_op2 : aint; _op3: tasmsymbol);
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begin
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inherited create(op);
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ops:=3;
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loadconst(0,_op1);
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loadconst(1,_op2);
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loadsymbol(2,_op3,0);
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end;
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constructor taicpu.op_sym(op : tasmop;_op1 : tasmsymbol);
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begin
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inherited create(op);
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ops:=1;
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loadsymbol(0,_op1,0);
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end;
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constructor taicpu.op_sym_ofs(op : tasmop;_op1 : tasmsymbol;_op1ofs:aint);
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begin
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inherited create(op);
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ops:=1;
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loadsymbol(0,_op1,_op1ofs);
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end;
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constructor taicpu.op_reg_sym_ofs(op : tasmop;_op1 : tregister;_op2:tasmsymbol;_op2ofs : aint);
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begin
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inherited create(op);
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ops:=2;
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loadreg(0,_op1);
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loadsymbol(1,_op2,_op2ofs);
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end;
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constructor taicpu.op_sym_ofs_ref(op : tasmop;_op1 : tasmsymbol;_op1ofs:aint;const _op2 : treference);
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begin
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inherited create(op);
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ops:=2;
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loadsymbol(0,_op1,_op1ofs);
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loadref(1,_op2);
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end;
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{ ****************************** newra stuff *************************** }
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function taicpu.is_same_reg_move(regtype: Tregistertype):boolean;
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begin
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result :=
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(((opcode=A_MR) and
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(regtype = R_INTREGISTER)) or
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((opcode = A_FMR) and
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(regtype = R_FPUREGISTER))) and
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{ these opcodes can only have registers as operands }
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(oper[0]^.reg=oper[1]^.reg);
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end;
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function taicpu.spilling_get_operation_type(opnr: longint): topertype;
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begin
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result := operand_read;
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case opcode of
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A_STMW,A_LMW:
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internalerror(2005021805);
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A_STBU, A_STBUX, A_STHU, A_STHUX,
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A_STWU, A_STWUX,
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A_STFSU, A_STFSUX, A_STFDU, A_STFDUX,
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A_STB, A_STBX, A_STH, A_STHX,
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A_STW, A_STWX,
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A_STFS, A_STFSX, A_STFD, A_STFDX, A_STFIWX, A_STHBRX, A_STWBRX, A_STWCX_,
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A_CMP, A_CMPI, A_CMPL, A_CMPLI,
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A_DCBA, A_DCBI, A_DCBST, A_DCBT, A_DCBTST, A_DCBZ, A_DCBF, A_ICBI,
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A_ECOWX, A_FCMPO, A_FCMPU, A_MTMSR, A_TLBIE, A_TW, A_TWI,
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A_CMPWI, A_CMPW, A_CMPLWI, A_CMPLW, A_MT, A_MTLR, A_MTCTR
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{$ifdef cpu64bitalu}
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, A_STDU, A_STDUX,
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A_STD, A_STDX,
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A_STDCX_,
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A_CMPD, A_CMPDI, A_CMPLD, A_CMPLDI,
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A_MFXER
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{$endif cpu64bitalu}
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: ;
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A_RLWIMI, A_RLWIMI_
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{$ifdef cpu64bitalu}
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, A_INSRDI, A_INSRDI_, A_RLDIMI
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{$endif not cpu64bitalu}
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:
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if opnr = 0 then
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result := operand_readwrite;
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else
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if opnr = 0 then
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result := operand_write;
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end;
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end;
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function taicpu.spilling_get_operation_type_ref(opnr: longint; reg: tregister): topertype;
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begin
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result := operand_read;
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case opcode of
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A_STBU, A_STBUX, A_STHU, A_STHUX, A_STWU, A_STWUX,
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{$ifdef cpu64bitalu}
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A_STDU, A_STDUX,
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{$endif cpu64bitalu}
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A_STFSU, A_STFSUX, A_STFDU, A_STFDUX:
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if (oper[opnr]^.ref^.base = reg) then
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result := operand_readwrite;
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end;
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end;
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function spilling_create_load(const ref:treference;r:tregister):Taicpu;
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begin
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case getregtype(r) of
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R_INTREGISTER:
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{$ifdef cpu64bitalu}
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result:=taicpu.op_reg_ref(A_LD,r,ref);
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{$else cpu64bitalu}
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result:=taicpu.op_reg_ref(A_LWZ,r,ref);
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{$endif cpu64bitalu}
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R_FPUREGISTER:
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result:=taicpu.op_reg_ref(A_LFD,r,ref);
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else
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internalerror(2005123101);
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end;
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end;
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function spilling_create_store(r:tregister; const ref:treference):Taicpu;
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begin
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case getregtype(r) of
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R_INTREGISTER:
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{$ifdef cpu64bitalu}
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result:=taicpu.op_reg_ref(A_STD,r,ref);
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{$else cpu64bitalu}
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result:=taicpu.op_reg_ref(A_STW,r,ref);
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{$endif cpu64bitalu}
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R_FPUREGISTER:
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result:=taicpu.op_reg_ref(A_STFD,r,ref);
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else
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internalerror(2005123102);
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end;
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end;
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procedure InitAsm;
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begin
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end;
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procedure DoneAsm;
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begin
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end;
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procedure fixup_jmps(list: TAsmList);
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var
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p: tai;
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newjmp: taicpu;
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labelpositions: TFPList;
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instrpos: ptrint;
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l: tasmlabel;
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inserted_something: boolean;
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begin
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// if certainly not enough instructions to cause an overflow, don't bother
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if (list.count <= (high(smallint) div 4)) then
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exit;
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labelpositions := TFPList.create;
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p := tai(list.first);
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instrpos := 1;
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// record label positions
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while assigned(p) do
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begin
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if p.typ = ait_label then
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begin
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if (tai_label(p).labsym.labelnr >= labelpositions.count) then
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labelpositions.count := tai_label(p).labsym.labelnr * 2;
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labelpositions[tai_label(p).labsym.labelnr] := pointer(instrpos);
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end;
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{ ait_const is for jump tables }
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case p.typ of
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ait_instruction:
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inc(instrpos);
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ait_const:
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begin
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if (tai_const(p).consttype<>aitconst_32bit) then
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internalerror(2008052101);
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inc(instrpos);
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end;
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end;
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p := tai(p.next);
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end;
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// check and fix distances
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repeat
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inserted_something := false;
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p := tai(list.first);
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instrpos := 1;
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while assigned(p) do
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begin
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case p.typ of
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ait_label:
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// update labelposition in case it changed due to insertion
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// of jumps
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begin
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// can happen because of newly inserted labels
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if (tai_label(p).labsym.labelnr > labelpositions.count) then
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labelpositions.count := tai_label(p).labsym.labelnr * 2;
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labelpositions[tai_label(p).labsym.labelnr] := pointer(instrpos);
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end;
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ait_instruction:
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begin
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inc(instrpos);
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case taicpu(p).opcode of
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A_BC:
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if (taicpu(p).oper[0]^.typ = top_ref) and
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assigned(taicpu(p).oper[0]^.ref^.symbol) and
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(taicpu(p).oper[0]^.ref^.symbol is tasmlabel) and
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(labelpositions[tasmlabel(taicpu(p).oper[0]^.ref^.symbol).labelnr] <> NIL) and
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{$ifopt q+}
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{$q-}
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{$define overflowon}
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{$endif}
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(ptruint(abs(ptrint(labelpositions[tasmlabel(taicpu(p).oper[0]^.ref^.symbol).labelnr]-instrpos)) - (low(smallint) div 4)) > ptruint((high(smallint) - low(smallint)) div 4)) then
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{$ifdef overflowon}
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{$q+}
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{$undef overflowon}
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{$endif}
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begin
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// add a new label after this jump
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current_asmdata.getjumplabel(l);
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{ new label -> may have to increase array size }
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if (l.labelnr >= labelpositions.count) then
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labelpositions.count := l.labelnr + 10;
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{ newjmp will be inserted before the label, and it's inserted after }
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{ the current jump -> instrpos+2 }
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labelpositions[l.labelnr] := pointer(instrpos+2);
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list.insertafter(tai_label.create(l),p);
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// add a new unconditional jump between this jump and the label
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newjmp := taicpu.op_sym(A_B,taicpu(p).oper[0]^.ref^.symbol);
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newjmp.is_jmp := true;
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newjmp.fileinfo := taicpu(p).fileinfo;
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list.insertafter(newjmp,p);
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inc(instrpos);
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// change the conditional jump to point to the newly inserted label
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tasmlabel(taicpu(p).oper[0]^.ref^.symbol).decrefs;
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taicpu(p).oper[0]^.ref^.symbol := l;
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l.increfs;
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// and invert its condition code
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taicpu(p).condition := inverse_cond(taicpu(p).condition);
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// we inserted an instruction, so will have to check everything again
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inserted_something := true;
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end;
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end;
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end;
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ait_const:
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inc(instrpos);
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end;
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p := tai(p.next);
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end;
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until not inserted_something;
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labelpositions.free;
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end;
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begin
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cai_align:=tai_align;
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cai_cpu:=taicpu;
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end.
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