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https://gitlab.com/freepascal.org/fpc/source.git
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594 lines
24 KiB
ObjectPascal
594 lines
24 KiB
ObjectPascal
{
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$Id$
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Copyright (c) 1993-98 by Florian Klaempfl
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Generate i386 assembler for math nodes
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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 cg386mat;
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interface
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uses
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tree;
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procedure secondmoddiv(var p : ptree);
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procedure secondshlshr(var p : ptree);
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procedure secondumminus(var p : ptree);
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procedure secondnot(var p : ptree);
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implementation
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uses
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cobjects,verbose,globals,systems,
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symtable,aasm,types,
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hcodegen,temp_gen,pass_2,
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i386,cgai386,tgeni386;
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{*****************************************************************************
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SecondModDiv
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*****************************************************************************}
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procedure secondmoddiv(var p : ptree);
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var
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hreg1 : tregister;
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pushed,popeax,popedx : boolean;
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power : longint;
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hl : plabel;
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begin
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secondpass(p^.left);
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set_location(p^.location,p^.left^.location);
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pushed:=maybe_push(p^.right^.registers32,p);
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secondpass(p^.right);
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if pushed then restore(p);
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{ put numerator in register }
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if p^.left^.location.loc<>LOC_REGISTER then
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begin
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if p^.left^.location.loc=LOC_CREGISTER then
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begin
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hreg1:=getregister32;
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emit_reg_reg(A_MOV,S_L,p^.left^.location.register,hreg1);
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end
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else
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begin
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del_reference(p^.left^.location.reference);
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hreg1:=getregister32;
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exprasmlist^.concat(new(pai386,op_ref_reg(A_MOV,S_L,newreference(p^.left^.location.reference),
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hreg1)));
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end;
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clear_location(p^.left^.location);
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p^.left^.location.loc:=LOC_REGISTER;
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p^.left^.location.register:=hreg1;
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end
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else hreg1:=p^.left^.location.register;
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if (p^.treetype=divn) and (p^.right^.treetype=ordconstn) and
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ispowerof2(p^.right^.value,power) then
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begin
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exprasmlist^.concat(new(pai386,op_reg_reg(A_OR,S_L,hreg1,hreg1)));
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getlabel(hl);
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emitl(A_JNS,hl);
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if power=1 then
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exprasmlist^.concat(new(pai386,op_reg(A_INC,S_L,hreg1)))
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else exprasmlist^.concat(new(pai386,op_const_reg(A_ADD,S_L,p^.right^.value-1,hreg1)));
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emitl(A_LABEL,hl);
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exprasmlist^.concat(new(pai386,op_const_reg(A_SAR,S_L,power,hreg1)));
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end
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else
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begin
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{ bring denominator to EDI }
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{ EDI is always free, it's }
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{ only used for temporary }
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{ purposes }
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if (p^.right^.location.loc<>LOC_REGISTER) and
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(p^.right^.location.loc<>LOC_CREGISTER) then
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begin
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del_reference(p^.right^.location.reference);
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p^.left^.location.loc:=LOC_REGISTER;
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exprasmlist^.concat(new(pai386,op_ref_reg(A_MOV,S_L,newreference(p^.right^.location.reference),R_EDI)));
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end
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else
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begin
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ungetregister32(p^.right^.location.register);
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emit_reg_reg(A_MOV,S_L,p^.right^.location.register,R_EDI);
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end;
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popedx:=false;
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popeax:=false;
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if hreg1=R_EDX then
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begin
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if not(R_EAX in unused) then
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begin
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exprasmlist^.concat(new(pai386,op_reg(A_PUSH,S_L,R_EAX)));
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popeax:=true;
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end;
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emit_reg_reg(A_MOV,S_L,R_EDX,R_EAX);
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end
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else
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begin
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if not(R_EDX in unused) then
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begin
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exprasmlist^.concat(new(pai386,op_reg(A_PUSH,S_L,R_EDX)));
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popedx:=true;
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end;
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if hreg1<>R_EAX then
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begin
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if not(R_EAX in unused) then
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begin
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exprasmlist^.concat(new(pai386,op_reg(A_PUSH,S_L,R_EAX)));
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popeax:=true;
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end;
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emit_reg_reg(A_MOV,S_L,hreg1,R_EAX);
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end;
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end;
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{ sign extension depends on the left type }
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if porddef(p^.left^.resulttype)^.typ=u32bit then
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exprasmlist^.concat(new(pai386,op_reg_reg(A_XOR,S_L,R_EDX,R_EDX)))
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else
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exprasmlist^.concat(new(pai386,op_none(A_CLTD,S_NO)));
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{ division depends on the right type }
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if porddef(p^.right^.resulttype)^.typ=u32bit then
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exprasmlist^.concat(new(pai386,op_reg(A_DIV,S_L,R_EDI)))
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else
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exprasmlist^.concat(new(pai386,op_reg(A_IDIV,S_L,R_EDI)));
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if p^.treetype=divn then
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begin
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{ if result register is busy then copy }
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if popeax then
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begin
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if hreg1=R_EAX then
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internalerror(112);
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emit_reg_reg(A_MOV,S_L,R_EAX,hreg1)
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end
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else
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if hreg1<>R_EAX then
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emit_reg_reg(A_MOV,S_L,R_EAX,hreg1);
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end
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else
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emit_reg_reg(A_MOV,S_L,R_EDX,hreg1);
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if popeax then
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exprasmlist^.concat(new(pai386,op_reg(A_POP,S_L,R_EAX)));
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if popedx then
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exprasmlist^.concat(new(pai386,op_reg(A_POP,S_L,R_EDX)));
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end;
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{ this registers are always used when div/mod are present }
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usedinproc:=usedinproc or ($80 shr byte(R_EAX));
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usedinproc:=usedinproc or ($80 shr byte(R_EDX));
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clear_location(p^.location);
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p^.location.loc:=LOC_REGISTER;
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p^.location.register:=hreg1;
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end;
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{*****************************************************************************
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SecondShlShr
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*****************************************************************************}
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procedure secondshlshr(var p : ptree);
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var
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hregister1,hregister2,hregister3 : tregister;
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pushed,popecx : boolean;
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op : tasmop;
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begin
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popecx:=false;
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secondpass(p^.left);
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pushed:=maybe_push(p^.right^.registers32,p);
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secondpass(p^.right);
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if pushed then restore(p);
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{ load left operators in a register }
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if p^.left^.location.loc<>LOC_REGISTER then
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begin
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if p^.left^.location.loc=LOC_CREGISTER then
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begin
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hregister1:=getregister32;
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emit_reg_reg(A_MOV,S_L,p^.left^.location.register,
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hregister1);
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end
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else
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begin
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del_reference(p^.left^.location.reference);
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hregister1:=getregister32;
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exprasmlist^.concat(new(pai386,op_ref_reg(A_MOV,S_L,newreference(p^.left^.location.reference),
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hregister1)));
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end;
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end
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else hregister1:=p^.left^.location.register;
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{ determine operator }
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if p^.treetype=shln then
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op:=A_SHL
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else
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op:=A_SHR;
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{ shifting by a constant directly decode: }
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if (p^.right^.treetype=ordconstn) then
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begin
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exprasmlist^.concat(new(pai386,op_const_reg(op,S_L,p^.right^.location.reference.offset and 31,
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hregister1)));
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p^.location.loc:=LOC_REGISTER;
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p^.location.register:=hregister1;
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end
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else
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begin
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{ load right operators in a register }
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if p^.right^.location.loc<>LOC_REGISTER then
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begin
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if p^.right^.location.loc=LOC_CREGISTER then
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begin
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hregister2:=getregister32;
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emit_reg_reg(A_MOV,S_L,p^.right^.location.register,
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hregister2);
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end
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else
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begin
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del_reference(p^.right^.location.reference);
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hregister2:=getregister32;
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exprasmlist^.concat(new(pai386,op_ref_reg(A_MOV,S_L,newreference(p^.right^.location.reference),
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hregister2)));
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end;
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end
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else hregister2:=p^.right^.location.register;
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{ left operator is already in a register }
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{ hence are both in a register }
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{ is it in the case ECX ? }
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if (hregister1=R_ECX) then
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begin
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{ then only swap }
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emit_reg_reg(A_XCHG,S_L,hregister1,
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hregister2);
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hregister3:=hregister1;
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hregister1:=hregister2;
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hregister2:=hregister3;
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end
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{ if second operator not in ECX ? }
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else if (hregister2<>R_ECX) then
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begin
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{ ECX not occupied then swap with right register }
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if R_ECX in unused then
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begin
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emit_reg_reg(A_MOV,S_L,hregister2,R_ECX);
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ungetregister32(hregister2);
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end
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else
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begin
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{ else save ECX and then copy it }
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popecx:=true;
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exprasmlist^.concat(new(pai386,op_reg(A_PUSH,S_L,R_ECX)));
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emit_reg_reg(A_MOV,S_L,hregister2,R_ECX);
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ungetregister32(hregister2);
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end;
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end;
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{ right operand is in ECX }
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emit_reg_reg(op,S_L,R_CL,hregister1);
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{ maybe ECX back }
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if popecx then
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exprasmlist^.concat(new(pai386,op_reg(A_POP,S_L,R_ECX)));
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p^.location.register:=hregister1;
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end;
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{ this register is always used when shl/shr are present }
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usedinproc:=usedinproc or ($80 shr byte(R_ECX));
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end;
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{*****************************************************************************
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SecondUmMinus
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*****************************************************************************}
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procedure secondumminus(var p : ptree);
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{$ifdef SUPPORT_MMX}
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procedure do_mmx_neg;
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var
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op : tasmop;
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begin
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p^.location.loc:=LOC_MMXREGISTER;
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if cs_mmx_saturation in aktlocalswitches then
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case mmx_type(p^.resulttype) of
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mmxs8bit:
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op:=A_PSUBSB;
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mmxu8bit:
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op:=A_PSUBUSB;
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mmxs16bit,mmxfixed16:
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op:=A_PSUBSW;
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mmxu16bit:
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op:=A_PSUBUSW;
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end
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else
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case mmx_type(p^.resulttype) of
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mmxs8bit,mmxu8bit:
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op:=A_PSUBB;
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mmxs16bit,mmxu16bit,mmxfixed16:
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op:=A_PSUBW;
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mmxs32bit,mmxu32bit:
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op:=A_PSUBD;
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end;
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emit_reg_reg(op,S_NO,p^.location.register,R_MM7);
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emit_reg_reg(A_MOVQ,S_NO,R_MM7,p^.location.register);
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end;
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{$endif}
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begin
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secondpass(p^.left);
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p^.location.loc:=LOC_REGISTER;
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case p^.left^.location.loc of
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LOC_REGISTER:
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begin
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p^.location.register:=p^.left^.location.register;
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exprasmlist^.concat(new(pai386,op_reg(A_NEG,S_L,p^.location.register)));
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end;
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LOC_CREGISTER:
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begin
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p^.location.register:=getregister32;
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emit_reg_reg(A_MOV,S_L,p^.location.register,
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p^.location.register);
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exprasmlist^.concat(new(pai386,op_reg(A_NEG,S_L,p^.location.register)));
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end;
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{$ifdef SUPPORT_MMX}
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LOC_MMXREGISTER:
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begin
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p^.location:=p^.left^.location;
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emit_reg_reg(A_PXOR,S_NO,R_MM7,R_MM7);
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do_mmx_neg;
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end;
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LOC_CMMXREGISTER:
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begin
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p^.location.register:=getregistermmx;
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emit_reg_reg(A_PXOR,S_NO,R_MM7,R_MM7);
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emit_reg_reg(A_MOVQ,S_NO,p^.left^.location.register,
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p^.location.register);
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do_mmx_neg;
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end;
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{$endif SUPPORT_MMX}
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LOC_REFERENCE,LOC_MEM:
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begin
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del_reference(p^.left^.location.reference);
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if (p^.left^.resulttype^.deftype=floatdef) and
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(pfloatdef(p^.left^.resulttype)^.typ<>f32bit) then
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begin
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p^.location.loc:=LOC_FPU;
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floatload(pfloatdef(p^.left^.resulttype)^.typ,
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p^.left^.location.reference);
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exprasmlist^.concat(new(pai386,op_none(A_FCHS,S_NO)));
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end
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{$ifdef SUPPORT_MMX}
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else if (cs_mmx in aktlocalswitches) and is_mmx_able_array(p^.left^.resulttype) then
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begin
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p^.location.register:=getregistermmx;
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emit_reg_reg(A_PXOR,S_NO,R_MM7,R_MM7);
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exprasmlist^.concat(new(pai386,op_ref_reg(A_MOVQ,S_NO,
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newreference(p^.left^.location.reference),
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p^.location.register)));
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do_mmx_neg;
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end
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{$endif SUPPORT_MMX}
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else
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begin
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p^.location.register:=getregister32;
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exprasmlist^.concat(new(pai386,op_ref_reg(A_MOV,S_L,
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newreference(p^.left^.location.reference),
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p^.location.register)));
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exprasmlist^.concat(new(pai386,op_reg(A_NEG,S_L,p^.location.register)));
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end;
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end;
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LOC_FPU:
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begin
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p^.location.loc:=LOC_FPU;
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exprasmlist^.concat(new(pai386,op_none(A_FCHS,S_NO)));
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end;
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end;
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{ Here was a problem... }
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{ Operand to be negated always }
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{ seems to be converted to signed }
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{ 32-bit before doing neg!! }
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{ So this is useless... }
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{ emitoverflowcheck(p);}
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end;
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{*****************************************************************************
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SecondNot
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*****************************************************************************}
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procedure secondnot(var p : ptree);
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const
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flagsinvers : array[F_E..F_BE] of tresflags =
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(F_NE,F_E,F_LE,F_GE,F_L,F_G,F_NC,F_C,
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F_A,F_AE,F_B,F_BE);
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var
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hl : plabel;
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opsize : topsize;
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begin
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if (p^.resulttype^.deftype=orddef) and
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(porddef(p^.resulttype)^.typ in [bool8bit,bool16bit,bool32bit]) then
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begin
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case porddef(p^.resulttype)^.typ of
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bool8bit : opsize:=S_B;
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bool16bit : opsize:=S_W;
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bool32bit : opsize:=S_L;
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end;
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case p^.location.loc of
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LOC_JUMP : begin
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hl:=truelabel;
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truelabel:=falselabel;
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falselabel:=hl;
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secondpass(p^.left);
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maketojumpbool(p^.left);
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hl:=truelabel;
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truelabel:=falselabel;
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falselabel:=hl;
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end;
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LOC_FLAGS : begin
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secondpass(p^.left);
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p^.location.resflags:=flagsinvers[p^.left^.location.resflags];
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end;
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LOC_REGISTER : begin
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secondpass(p^.left);
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p^.location.register:=p^.left^.location.register;
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exprasmlist^.concat(new(pai386,op_const_reg(A_XOR,opsize,1,p^.location.register)));
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end;
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LOC_CREGISTER : begin
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secondpass(p^.left);
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p^.location.loc:=LOC_REGISTER;
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case porddef(p^.resulttype)^.typ of
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bool8bit : p^.location.register:=reg32toreg8(getregister32);
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bool16bit : p^.location.register:=reg32toreg16(getregister32);
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bool32bit : p^.location.register:=getregister32;
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end;
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emit_reg_reg(A_MOV,opsize,p^.left^.location.register,p^.location.register);
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exprasmlist^.concat(new(pai386,op_const_reg(A_XOR,opsize,1,p^.location.register)));
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end;
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LOC_REFERENCE,
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LOC_MEM : begin
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secondpass(p^.left);
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del_reference(p^.left^.location.reference);
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p^.location.loc:=LOC_REGISTER;
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case porddef(p^.resulttype)^.typ of
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bool8bit : p^.location.register:=reg32toreg8(getregister32);
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bool16bit : p^.location.register:=reg32toreg16(getregister32);
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bool32bit : p^.location.register:=getregister32;
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end;
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if p^.left^.location.loc=LOC_CREGISTER then
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emit_reg_reg(A_MOV,opsize,p^.left^.location.register,p^.location.register)
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else
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exprasmlist^.concat(new(pai386,op_ref_reg(A_MOV,opsize,
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newreference(p^.left^.location.reference),p^.location.register)));
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exprasmlist^.concat(new(pai386,op_const_reg(A_XOR,opsize,1,p^.location.register)));
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end;
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end;
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end
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{$ifdef SUPPORT_MMX}
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|
else if (cs_mmx in aktlocalswitches) and is_mmx_able_array(p^.left^.resulttype) then
|
|
begin
|
|
secondpass(p^.left);
|
|
p^.location.loc:=LOC_MMXREGISTER;
|
|
{ prepare EDI }
|
|
exprasmlist^.concat(new(pai386,op_const_reg(A_MOV,S_L,$ffffffff,R_EDI)));
|
|
{ load operand }
|
|
case p^.left^.location.loc of
|
|
LOC_MMXREGISTER:
|
|
p^.location:=p^.left^.location;
|
|
LOC_CMMXREGISTER:
|
|
begin
|
|
p^.location.register:=getregistermmx;
|
|
emit_reg_reg(A_MOVQ,S_NO,p^.left^.location.register,
|
|
p^.location.register);
|
|
end;
|
|
LOC_REFERENCE,LOC_MEM:
|
|
begin
|
|
del_reference(p^.left^.location.reference);
|
|
p^.location.register:=getregistermmx;
|
|
exprasmlist^.concat(new(pai386,op_ref_reg(A_MOVQ,S_NO,
|
|
newreference(p^.left^.location.reference),
|
|
p^.location.register)));
|
|
end;
|
|
end;
|
|
{ load mask }
|
|
emit_reg_reg(A_MOV,S_D,R_EDI,R_MM7);
|
|
{ lower 32 bit }
|
|
emit_reg_reg(A_PXOR,S_D,R_MM7,p^.location.register);
|
|
{ shift mask }
|
|
exprasmlist^.concat(new(pai386,op_const_reg(A_PSLLQ,S_NO,
|
|
32,R_MM7)));
|
|
{ higher 32 bit }
|
|
emit_reg_reg(A_PXOR,S_D,R_MM7,p^.location.register);
|
|
end
|
|
{$endif SUPPORT_MMX}
|
|
else
|
|
begin
|
|
secondpass(p^.left);
|
|
p^.location.loc:=LOC_REGISTER;
|
|
|
|
case p^.left^.location.loc of
|
|
LOC_REGISTER : begin
|
|
p^.location.register:=p^.left^.location.register;
|
|
exprasmlist^.concat(new(pai386,op_reg(A_NOT,S_L,p^.location.register)));
|
|
end;
|
|
LOC_CREGISTER : begin
|
|
p^.location.register:=getregister32;
|
|
emit_reg_reg(A_MOV,S_L,p^.left^.location.register,
|
|
p^.location.register);
|
|
exprasmlist^.concat(new(pai386,op_reg(A_NOT,S_L,p^.location.register)));
|
|
end;
|
|
LOC_REFERENCE,LOC_MEM :
|
|
begin
|
|
del_reference(p^.left^.location.reference);
|
|
p^.location.register:=getregister32;
|
|
exprasmlist^.concat(new(pai386,op_ref_reg(A_MOV,S_L,
|
|
newreference(p^.left^.location.reference),
|
|
p^.location.register)));
|
|
exprasmlist^.concat(new(pai386,op_reg(A_NOT,S_L,p^.location.register)));
|
|
end;
|
|
end;
|
|
{if p^.left^.location.loc=loc_register then
|
|
p^.location.register:=p^.left^.location.register
|
|
else
|
|
begin
|
|
del_locref(p^.left^.location);
|
|
p^.location.register:=getregister32;
|
|
exprasmlist^.concat(new(pai386,op_loc_reg(A_MOV,S_L,
|
|
p^.left^.location,
|
|
p^.location.register)));
|
|
end;
|
|
exprasmlist^.concat(new(pai386,op_reg(A_NOT,S_L,p^.location.register)));}
|
|
|
|
end;
|
|
end;
|
|
|
|
|
|
|
|
end.
|
|
{
|
|
$Log$
|
|
Revision 1.8 1998-10-09 08:56:24 pierre
|
|
* several memory leaks fixed
|
|
|
|
Revision 1.7 1998/09/17 09:42:17 peter
|
|
+ pass_2 for cg386
|
|
* Message() -> CGMessage() for pass_1/pass_2
|
|
|
|
Revision 1.6 1998/09/09 14:37:37 florian
|
|
* mod/div for cardinal type fixed
|
|
|
|
Revision 1.5 1998/08/23 16:07:20 florian
|
|
* internalerror with mod/div fixed
|
|
|
|
Revision 1.4 1998/08/18 09:24:38 pierre
|
|
* small warning position bug fixed
|
|
* support_mmx switches splitting was missing
|
|
* rhide error and warning output corrected
|
|
|
|
Revision 1.3 1998/06/05 17:44:12 peter
|
|
* splitted cgi386
|
|
|
|
Revision 1.2 1998/06/02 17:02:59 pierre
|
|
* with node corrected for objects
|
|
* small bugs for SUPPORT_MMX fixed
|
|
|
|
Revision 1.1 1998/06/01 16:50:18 peter
|
|
+ boolean -> ord conversion
|
|
* fixed ord -> boolean conversion
|
|
|
|
}
|