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|
{
Copyright (c) 1998-2002 by Florian Klaempfl
This unit implements the code generator for the i386
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 cgcpu;
{$i fpcdefs.inc}
interface
uses
globtype,
cgbase,cgobj,cg64f32,cgx86,
aasmbase,aasmtai,aasmdata,aasmcpu,
cpubase,parabase,cgutils,
symconst,symdef
;
type
tcg386 = class(tcgx86)
procedure init_register_allocators;override;
procedure do_register_allocation(list:TAsmList;headertai:tai);override;
{ passing parameter using push instead of mov }
procedure a_load_reg_cgpara(list : TAsmList;size : tcgsize;r : tregister;const cgpara : tcgpara);override;
procedure a_load_const_cgpara(list : TAsmList;size : tcgsize;a : tcgint;const cgpara : tcgpara);override;
procedure a_load_ref_cgpara(list : TAsmList;size : tcgsize;const r : treference;const cgpara : tcgpara);override;
procedure a_loadaddr_ref_cgpara(list : TAsmList;const r : treference;const cgpara : tcgpara);override;
procedure g_proc_exit(list : TAsmList;parasize:longint;nostackframe:boolean);override;
procedure g_copyvaluepara_openarray(list : TAsmList;const ref:treference;const lenloc:tlocation;elesize:tcgint;destreg:tregister);override;
procedure g_releasevaluepara_openarray(list : TAsmList;const l:tlocation);override;
procedure g_exception_reason_save(list : TAsmList; const href : treference);override;
procedure g_exception_reason_save_const(list : TAsmList; const href : treference; a: tcgint);override;
procedure g_exception_reason_load(list : TAsmList; const href : treference);override;
procedure g_intf_wrapper(list: TAsmList; procdef: tprocdef; const labelname: string; ioffset: longint);override;
procedure g_maybe_got_init(list: TAsmList); override;
end;
tcg64f386 = class(tcg64f32)
procedure a_op64_ref_reg(list : TAsmList;op:TOpCG;size : tcgsize;const ref : treference;reg : tregister64);override;
procedure a_op64_reg_reg(list : TAsmList;op:TOpCG;size : tcgsize;regsrc,regdst : tregister64);override;
procedure a_op64_const_reg(list : TAsmList;op:TOpCG;size : tcgsize;value : int64;reg : tregister64);override;
procedure a_op64_const_ref(list : TAsmList;op:TOpCG;size : tcgsize;value : int64;const ref : treference);override;
private
procedure get_64bit_ops(op:TOpCG;var op1,op2:TAsmOp);
end;
procedure create_codegen;
implementation
uses
globals,verbose,systems,cutils,
paramgr,procinfo,fmodule,
rgcpu,rgx86,cpuinfo;
function use_push(const cgpara:tcgpara):boolean;
begin
result:=(not paramanager.use_fixed_stack) and
assigned(cgpara.location) and
(cgpara.location^.loc=LOC_REFERENCE) and
(cgpara.location^.reference.index=NR_STACK_POINTER_REG);
end;
procedure tcg386.init_register_allocators;
begin
inherited init_register_allocators;
if not(target_info.system in [system_i386_darwin,system_i386_iphonesim]) and
(cs_create_pic in current_settings.moduleswitches) then
rg[R_INTREGISTER]:=trgcpu.create(R_INTREGISTER,R_SUBWHOLE,[RS_EAX,RS_EDX,RS_ECX,RS_ESI,RS_EDI],first_int_imreg,[RS_EBP])
else
rg[R_INTREGISTER]:=trgcpu.create(R_INTREGISTER,R_SUBWHOLE,[RS_EAX,RS_EDX,RS_ECX,RS_EBX,RS_ESI,RS_EDI],first_int_imreg,[RS_EBP]);
rg[R_MMXREGISTER]:=trgcpu.create(R_MMXREGISTER,R_SUBNONE,[RS_XMM0,RS_XMM1,RS_XMM2,RS_XMM3,RS_XMM4,RS_XMM5,RS_XMM6,RS_XMM7],first_mm_imreg,[]);
rg[R_MMREGISTER]:=trgcpu.create(R_MMREGISTER,R_SUBWHOLE,[RS_XMM0,RS_XMM1,RS_XMM2,RS_XMM3,RS_XMM4,RS_XMM5,RS_XMM6,RS_XMM7],first_mm_imreg,[]);
rgfpu:=Trgx86fpu.create;
end;
procedure tcg386.do_register_allocation(list:TAsmList;headertai:tai);
begin
if (pi_needs_got in current_procinfo.flags) then
begin
if getsupreg(current_procinfo.got) < first_int_imreg then
include(rg[R_INTREGISTER].used_in_proc,getsupreg(current_procinfo.got));
end;
inherited do_register_allocation(list,headertai);
end;
procedure tcg386.a_load_reg_cgpara(list : TAsmList;size : tcgsize;r : tregister;const cgpara : tcgpara);
var
pushsize : tcgsize;
begin
check_register_size(size,r);
if use_push(cgpara) then
begin
cgpara.check_simple_location;
if tcgsize2size[cgpara.location^.size]>cgpara.alignment then
pushsize:=cgpara.location^.size
else
pushsize:=int_cgsize(cgpara.alignment);
list.concat(taicpu.op_reg(A_PUSH,tcgsize2opsize[pushsize],makeregsize(list,r,pushsize)));
end
else
inherited a_load_reg_cgpara(list,size,r,cgpara);
end;
procedure tcg386.a_load_const_cgpara(list : TAsmList;size : tcgsize;a : tcgint;const cgpara : tcgpara);
var
pushsize : tcgsize;
begin
if use_push(cgpara) then
begin
cgpara.check_simple_location;
if tcgsize2size[cgpara.location^.size]>cgpara.alignment then
pushsize:=cgpara.location^.size
else
pushsize:=int_cgsize(cgpara.alignment);
list.concat(taicpu.op_const(A_PUSH,tcgsize2opsize[pushsize],a));
end
else
inherited a_load_const_cgpara(list,size,a,cgpara);
end;
procedure tcg386.a_load_ref_cgpara(list : TAsmList;size : tcgsize;const r : treference;const cgpara : tcgpara);
procedure pushdata(paraloc:pcgparalocation;ofs:tcgint);
var
pushsize : tcgsize;
tmpreg : tregister;
href : treference;
begin
if not assigned(paraloc) then
exit;
if (paraloc^.loc<>LOC_REFERENCE) or
(paraloc^.reference.index<>NR_STACK_POINTER_REG) or
(tcgsize2size[paraloc^.size]>sizeof(aint)) then
internalerror(200501162);
{ Pushes are needed in reverse order, add the size of the
current location to the offset where to load from. This
prevents wrong calculations for the last location when
the size is not a power of 2 }
if assigned(paraloc^.next) then
pushdata(paraloc^.next,ofs+tcgsize2size[paraloc^.size]);
{ Push the data starting at ofs }
href:=r;
inc(href.offset,ofs);
if tcgsize2size[paraloc^.size]>cgpara.alignment then
pushsize:=paraloc^.size
else
pushsize:=int_cgsize(cgpara.alignment);
if tcgsize2size[paraloc^.size]<cgpara.alignment then
begin
tmpreg:=getintregister(list,pushsize);
a_load_ref_reg(list,paraloc^.size,pushsize,href,tmpreg);
list.concat(taicpu.op_reg(A_PUSH,TCgsize2opsize[pushsize],tmpreg));
end
else
begin
make_simple_ref(list,href);
list.concat(taicpu.op_ref(A_PUSH,TCgsize2opsize[pushsize],href));
end;
end;
var
len : tcgint;
href : treference;
begin
{ cgpara.size=OS_NO requires a copy on the stack }
if use_push(cgpara) then
begin
{ Record copy? }
if (cgpara.size in [OS_NO,OS_F64]) or (size=OS_NO) then
begin
cgpara.check_simple_location;
len:=align(cgpara.intsize,cgpara.alignment);
g_stackpointer_alloc(list,len);
reference_reset_base(href,NR_STACK_POINTER_REG,0,4);
g_concatcopy(list,r,href,len);
end
else
begin
if tcgsize2size[cgpara.size]<>tcgsize2size[size] then
internalerror(200501161);
{ We need to push the data in reverse order,
therefor we use a recursive algorithm }
pushdata(cgpara.location,0);
end
end
else
inherited a_load_ref_cgpara(list,size,r,cgpara);
end;
procedure tcg386.a_loadaddr_ref_cgpara(list : TAsmList;const r : treference;const cgpara : tcgpara);
var
tmpreg : tregister;
opsize : topsize;
tmpref : treference;
begin
with r do
begin
if (segment<>NR_NO) then
cgmessage(cg_e_cant_use_far_pointer_there);
if use_push(cgpara) then
begin
cgpara.check_simple_location;
opsize:=tcgsize2opsize[OS_ADDR];
if (segment=NR_NO) and (base=NR_NO) and (index=NR_NO) then
begin
if assigned(symbol) then
begin
if (target_info.system in [system_i386_darwin,system_i386_iphonesim]) and
((r.symbol.bind in [AB_EXTERNAL,AB_WEAK_EXTERNAL]) or
(cs_create_pic in current_settings.moduleswitches)) then
begin
tmpreg:=getaddressregister(list);
a_loadaddr_ref_reg(list,r,tmpreg);
list.concat(taicpu.op_reg(A_PUSH,opsize,tmpreg));
end
else if cs_create_pic in current_settings.moduleswitches then
begin
if offset<>0 then
begin
tmpreg:=getaddressregister(list);
a_loadaddr_ref_reg(list,r,tmpreg);
list.concat(taicpu.op_reg(A_PUSH,opsize,tmpreg));
end
else
begin
reference_reset_symbol(tmpref,r.symbol,0,r.alignment);
tmpref.refaddr:=addr_pic;
tmpref.base:=current_procinfo.got;
include(current_procinfo.flags,pi_needs_got);
list.concat(taicpu.op_ref(A_PUSH,S_L,tmpref));
end
end
else
list.concat(Taicpu.Op_sym_ofs(A_PUSH,opsize,symbol,offset));
end
else
list.concat(Taicpu.Op_const(A_PUSH,opsize,offset));
end
else if (segment=NR_NO) and (base=NR_NO) and (index<>NR_NO) and
(offset=0) and (scalefactor=0) and (symbol=nil) then
list.concat(Taicpu.Op_reg(A_PUSH,opsize,index))
else if (segment=NR_NO) and (base<>NR_NO) and (index=NR_NO) and
(offset=0) and (symbol=nil) then
list.concat(Taicpu.Op_reg(A_PUSH,opsize,base))
else
begin
tmpreg:=getaddressregister(list);
a_loadaddr_ref_reg(list,r,tmpreg);
list.concat(taicpu.op_reg(A_PUSH,opsize,tmpreg));
end;
end
else
inherited a_loadaddr_ref_cgpara(list,r,cgpara);
end;
end;
procedure tcg386.g_proc_exit(list : TAsmList;parasize:longint;nostackframe:boolean);
var
stacksize : longint;
begin
{ MMX needs to call EMMS }
if assigned(rg[R_MMXREGISTER]) and
(rg[R_MMXREGISTER].uses_registers) then
list.concat(Taicpu.op_none(A_EMMS,S_NO));
{ remove stackframe }
if not nostackframe then
begin
if (current_procinfo.framepointer=NR_STACK_POINTER_REG) then
begin
stacksize:=current_procinfo.calc_stackframe_size;
if (target_info.system in [system_i386_darwin,system_i386_iphonesim]) and
((stacksize <> 0) or
(pi_do_call in current_procinfo.flags) or
{ can't detect if a call in this case -> use nostackframe }
{ if you (think you) know what you are doing }
(po_assembler in current_procinfo.procdef.procoptions)) then
stacksize := align(stacksize+sizeof(aint),16) - sizeof(aint);
if (stacksize<>0) then
cg.a_op_const_reg(list,OP_ADD,OS_ADDR,stacksize,current_procinfo.framepointer);
end
else
list.concat(Taicpu.op_none(A_LEAVE,S_NO));
list.concat(tai_regalloc.dealloc(current_procinfo.framepointer,nil));
end;
{ return from proc }
if (po_interrupt in current_procinfo.procdef.procoptions) and
{ this messes up stack alignment }
not(target_info.system in [system_i386_darwin,system_i386_iphonesim]) then
begin
if assigned(current_procinfo.procdef.funcretloc[calleeside].location) and
(current_procinfo.procdef.funcretloc[calleeside].location^.loc=LOC_REGISTER) then
begin
if (getsupreg(current_procinfo.procdef.funcretloc[calleeside].location^.register)=RS_EAX) then
list.concat(Taicpu.Op_const_reg(A_ADD,S_L,4,NR_ESP))
else
internalerror(2010053001);
end
else
list.concat(Taicpu.Op_reg(A_POP,S_L,NR_EAX));
list.concat(Taicpu.Op_reg(A_POP,S_L,NR_EBX));
list.concat(Taicpu.Op_reg(A_POP,S_L,NR_ECX));
if (current_procinfo.procdef.funcretloc[calleeside].size in [OS_64,OS_S64]) and
assigned(current_procinfo.procdef.funcretloc[calleeside].location) and
assigned(current_procinfo.procdef.funcretloc[calleeside].location^.next) and
(current_procinfo.procdef.funcretloc[calleeside].location^.next^.loc=LOC_REGISTER) then
begin
if (getsupreg(current_procinfo.procdef.funcretloc[calleeside].location^.next^.register)=RS_EDX) then
list.concat(Taicpu.Op_const_reg(A_ADD,S_L,4,NR_ESP))
else
internalerror(2010053002);
end
else
list.concat(Taicpu.Op_reg(A_POP,S_L,NR_EDX));
list.concat(Taicpu.Op_reg(A_POP,S_L,NR_ESI));
list.concat(Taicpu.Op_reg(A_POP,S_L,NR_EDI));
{ .... also the segment registers }
list.concat(Taicpu.Op_reg(A_POP,S_W,NR_DS));
list.concat(Taicpu.Op_reg(A_POP,S_W,NR_ES));
list.concat(Taicpu.Op_reg(A_POP,S_W,NR_FS));
list.concat(Taicpu.Op_reg(A_POP,S_W,NR_GS));
{ this restores the flags }
list.concat(Taicpu.Op_none(A_IRET,S_NO));
end
{ Routines with the poclearstack flag set use only a ret }
else if (current_procinfo.procdef.proccalloption in clearstack_pocalls) and
(not paramanager.use_fixed_stack) then
begin
{ complex return values are removed from stack in C code PM }
{ but not on win32 }
{ and not for safecall with hidden exceptions, because the result }
{ wich contains the exception is passed in EAX }
if (target_info.system <> system_i386_win32) and
not ((current_procinfo.procdef.proccalloption = pocall_safecall) and
(tf_safecall_exceptions in target_info.flags)) and
paramanager.ret_in_param(current_procinfo.procdef.returndef,
current_procinfo.procdef.proccalloption) then
list.concat(Taicpu.Op_const(A_RET,S_W,sizeof(aint)))
else
list.concat(Taicpu.Op_none(A_RET,S_NO));
end
{ ... also routines with parasize=0 }
else if (parasize=0) then
list.concat(Taicpu.Op_none(A_RET,S_NO))
else
begin
{ parameters are limited to 65535 bytes because ret allows only imm16 }
if (parasize>65535) then
CGMessage(cg_e_parasize_too_big);
list.concat(Taicpu.Op_const(A_RET,S_W,parasize));
end;
end;
procedure tcg386.g_copyvaluepara_openarray(list : TAsmList;const ref:treference;const lenloc:tlocation;elesize:tcgint;destreg:tregister);
var
power,len : longint;
opsize : topsize;
{$ifndef __NOWINPECOFF__}
again,ok : tasmlabel;
{$endif}
begin
if paramanager.use_fixed_stack then
begin
inherited g_copyvaluepara_openarray(list,ref,lenloc,elesize,destreg);
exit;
end;
{ get stack space }
getcpuregister(list,NR_EDI);
a_load_loc_reg(list,OS_INT,lenloc,NR_EDI);
list.concat(Taicpu.op_reg(A_INC,S_L,NR_EDI));
{ Now EDI contains (high+1). Copy it to ECX for later use. }
getcpuregister(list,NR_ECX);
list.concat(Taicpu.op_reg_reg(A_MOV,S_L,NR_EDI,NR_ECX));
if (elesize<>1) then
begin
if ispowerof2(elesize, power) then
list.concat(Taicpu.op_const_reg(A_SHL,S_L,power,NR_EDI))
else
list.concat(Taicpu.op_const_reg(A_IMUL,S_L,elesize,NR_EDI));
end;
{$ifndef __NOWINPECOFF__}
{ windows guards only a few pages for stack growing, }
{ so we have to access every page first }
if target_info.system=system_i386_win32 then
begin
current_asmdata.getjumplabel(again);
current_asmdata.getjumplabel(ok);
a_label(list,again);
list.concat(Taicpu.op_const_reg(A_CMP,S_L,winstackpagesize,NR_EDI));
a_jmp_cond(list,OC_B,ok);
list.concat(Taicpu.op_const_reg(A_SUB,S_L,winstackpagesize-4,NR_ESP));
list.concat(Taicpu.op_reg(A_PUSH,S_L,NR_EDI));
list.concat(Taicpu.op_const_reg(A_SUB,S_L,winstackpagesize,NR_EDI));
a_jmp_always(list,again);
a_label(list,ok);
end;
{$endif __NOWINPECOFF__}
{ If we were probing pages, EDI=(size mod pagesize) and ESP is decremented
by (size div pagesize)*pagesize, otherwise EDI=size.
Either way, subtracting EDI from ESP will set ESP to desired final value. }
list.concat(Taicpu.op_reg_reg(A_SUB,S_L,NR_EDI,NR_ESP));
{ align stack on 4 bytes }
list.concat(Taicpu.op_const_reg(A_AND,S_L,aint($fffffff4),NR_ESP));
{ load destination, don't use a_load_reg_reg, that will add a move instruction
that can confuse the reg allocator }
list.concat(Taicpu.Op_reg_reg(A_MOV,S_L,NR_ESP,NR_EDI));
{ Allocate ESI and load it with source }
getcpuregister(list,NR_ESI);
a_loadaddr_ref_reg(list,ref,NR_ESI);
{ calculate size }
len:=elesize;
opsize:=S_B;
if (len and 3)=0 then
begin
opsize:=S_L;
len:=len shr 2;
end
else
if (len and 1)=0 then
begin
opsize:=S_W;
len:=len shr 1;
end;
if len>1 then
begin
if ispowerof2(len, power) then
list.concat(Taicpu.op_const_reg(A_SHL,S_L,power,NR_ECX))
else
list.concat(Taicpu.op_const_reg(A_IMUL,S_L,len,NR_ECX));
end;
list.concat(Taicpu.op_none(A_REP,S_NO));
case opsize of
S_B : list.concat(Taicpu.Op_none(A_MOVSB,S_NO));
S_W : list.concat(Taicpu.Op_none(A_MOVSW,S_NO));
S_L : list.concat(Taicpu.Op_none(A_MOVSD,S_NO));
end;
ungetcpuregister(list,NR_EDI);
ungetcpuregister(list,NR_ECX);
ungetcpuregister(list,NR_ESI);
{ patch the new address, but don't use a_load_reg_reg, that will add a move instruction
that can confuse the reg allocator }
list.concat(Taicpu.Op_reg_reg(A_MOV,S_L,NR_ESP,destreg));
end;
procedure tcg386.g_releasevaluepara_openarray(list : TAsmList;const l:tlocation);
begin
if paramanager.use_fixed_stack then
begin
inherited g_releasevaluepara_openarray(list,l);
exit;
end;
{ Nothing to release }
end;
procedure tcg386.g_exception_reason_save(list : TAsmList; const href : treference);
begin
if not paramanager.use_fixed_stack then
list.concat(Taicpu.op_reg(A_PUSH,tcgsize2opsize[OS_INT],NR_FUNCTION_RESULT_REG))
else
inherited g_exception_reason_save(list,href);
end;
procedure tcg386.g_exception_reason_save_const(list : TAsmList;const href : treference; a: tcgint);
begin
if not paramanager.use_fixed_stack then
list.concat(Taicpu.op_const(A_PUSH,tcgsize2opsize[OS_INT],a))
else
inherited g_exception_reason_save_const(list,href,a);
end;
procedure tcg386.g_exception_reason_load(list : TAsmList; const href : treference);
begin
if not paramanager.use_fixed_stack then
begin
cg.a_reg_alloc(list,NR_FUNCTION_RESULT_REG);
list.concat(Taicpu.op_reg(A_POP,tcgsize2opsize[OS_INT],NR_FUNCTION_RESULT_REG))
end
else
inherited g_exception_reason_load(list,href);
end;
procedure tcg386.g_maybe_got_init(list: TAsmList);
var
notdarwin: boolean;
begin
{ allocate PIC register }
if (cs_create_pic in current_settings.moduleswitches) and
(tf_pic_uses_got in target_info.flags) and
(pi_needs_got in current_procinfo.flags) then
begin
notdarwin:=not(target_info.system in [system_i386_darwin,system_i386_iphonesim]);
{ on darwin, the got register is virtual (and allocated earlier
already) }
if notdarwin then
{ ecx could be used in leaf procedures that don't use ecx to pass
aparameter }
current_procinfo.got:=NR_EBX;
if notdarwin { needs testing before it can be enabled for non-darwin platforms
and
(current_settings.optimizecputype in [cpu_Pentium2,cpu_Pentium3,cpu_Pentium4]) } then
begin
current_module.requires_ebx_pic_helper:=true;
cg.a_call_name_static(list,'fpc_geteipasebx');
end
else
begin
{ call/pop is faster than call/ret/mov on Core Solo and later
according to Apple's benchmarking -- and all Intel Macs
have at least a Core Solo (furthermore, the i386 - Pentium 1
don't have a return stack buffer) }
a_call_name_static(list,current_procinfo.CurrGOTLabel.name);
a_label(list,current_procinfo.CurrGotLabel);
list.concat(taicpu.op_reg(A_POP,S_L,current_procinfo.got))
end;
if notdarwin then
begin
list.concat(taicpu.op_sym_ofs_reg(A_ADD,S_L,current_asmdata.RefAsmSymbol('_GLOBAL_OFFSET_TABLE_'),0,NR_PIC_OFFSET_REG));
list.concat(tai_regalloc.alloc(NR_PIC_OFFSET_REG,nil));
end;
end;
end;
procedure tcg386.g_intf_wrapper(list: TAsmList; procdef: tprocdef; const labelname: string; ioffset: longint);
{
possible calling conventions:
default stdcall cdecl pascal register
default(0): OK OK OK OK OK
virtual(1): OK OK OK OK OK(2)
(0):
set self parameter to correct value
jmp mangledname
(1): The wrapper code use %eax to reach the virtual method address
set self to correct value
move self,%eax
mov 0(%eax),%eax ; load vmt
jmp vmtoffs(%eax) ; method offs
(2): Virtual use values pushed on stack to reach the method address
so the following code be generated:
set self to correct value
push %ebx ; allocate space for function address
push %eax
mov self,%eax
mov 0(%eax),%eax ; load vmt
mov vmtoffs(%eax),eax ; method offs
mov %eax,4(%esp)
pop %eax
ret 0; jmp the address
}
procedure getselftoeax(offs: longint);
var
href : treference;
selfoffsetfromsp : longint;
begin
{ mov offset(%esp),%eax }
if (procdef.proccalloption<>pocall_register) then
begin
{ framepointer is pushed for nested procs }
if procdef.parast.symtablelevel>normal_function_level then
selfoffsetfromsp:=2*sizeof(aint)
else
selfoffsetfromsp:=sizeof(aint);
reference_reset_base(href,NR_ESP,selfoffsetfromsp+offs,4);
cg.a_load_ref_reg(list,OS_ADDR,OS_ADDR,href,NR_EAX);
end;
end;
procedure loadvmttoeax;
var
href : treference;
begin
{ mov 0(%eax),%eax ; load vmt}
reference_reset_base(href,NR_EAX,0,4);
cg.a_load_ref_reg(list,OS_ADDR,OS_ADDR,href,NR_EAX);
end;
procedure op_oneaxmethodaddr(op: TAsmOp);
var
href : treference;
begin
if (procdef.extnumber=$ffff) then
Internalerror(200006139);
{ call/jmp vmtoffs(%eax) ; method offs }
reference_reset_base(href,NR_EAX,tobjectdef(procdef.struct).vmtmethodoffset(procdef.extnumber),4);
list.concat(taicpu.op_ref(op,S_L,href));
end;
procedure loadmethodoffstoeax;
var
href : treference;
begin
if (procdef.extnumber=$ffff) then
Internalerror(200006139);
{ mov vmtoffs(%eax),%eax ; method offs }
reference_reset_base(href,NR_EAX,tobjectdef(procdef.struct).vmtmethodoffset(procdef.extnumber),4);
cg.a_load_ref_reg(list,OS_ADDR,OS_ADDR,href,NR_EAX);
end;
var
lab : tasmsymbol;
make_global : boolean;
href : treference;
begin
if not(procdef.proctypeoption in [potype_function,potype_procedure]) then
Internalerror(200006137);
if not assigned(procdef.struct) or
(procdef.procoptions*[po_classmethod, po_staticmethod,
po_methodpointer, po_interrupt, po_iocheck]<>[]) then
Internalerror(200006138);
if procdef.owner.symtabletype<>ObjectSymtable then
Internalerror(200109191);
make_global:=false;
if (not current_module.is_unit) or
create_smartlink or
(procdef.owner.defowner.owner.symtabletype=globalsymtable) then
make_global:=true;
if make_global then
List.concat(Tai_symbol.Createname_global(labelname,AT_FUNCTION,0))
else
List.concat(Tai_symbol.Createname(labelname,AT_FUNCTION,0));
{ set param1 interface to self }
g_adjust_self_value(list,procdef,ioffset);
if (po_virtualmethod in procdef.procoptions) and
not is_objectpascal_helper(procdef.struct) then
begin
if (procdef.proccalloption=pocall_register) then
begin
{ case 2 }
list.concat(taicpu.op_reg(A_PUSH,S_L,NR_EBX)); { allocate space for address}
list.concat(taicpu.op_reg(A_PUSH,S_L,NR_EAX));
getselftoeax(8);
loadvmttoeax;
loadmethodoffstoeax;
{ mov %eax,4(%esp) }
reference_reset_base(href,NR_ESP,4,4);
list.concat(taicpu.op_reg_ref(A_MOV,S_L,NR_EAX,href));
{ pop %eax }
list.concat(taicpu.op_reg(A_POP,S_L,NR_EAX));
{ ret ; jump to the address }
list.concat(taicpu.op_none(A_RET,S_L));
end
else
begin
{ case 1 }
getselftoeax(0);
loadvmttoeax;
op_oneaxmethodaddr(A_JMP);
end;
end
{ case 0 }
else
begin
if (target_info.system <> system_i386_darwin) then
begin
lab:=current_asmdata.RefAsmSymbol(procdef.mangledname);
list.concat(taicpu.op_sym(A_JMP,S_NO,lab))
end
else
list.concat(taicpu.op_sym(A_JMP,S_NO,get_darwin_call_stub(procdef.mangledname,false)))
end;
List.concat(Tai_symbol_end.Createname(labelname));
end;
{ ************* 64bit operations ************ }
procedure tcg64f386.get_64bit_ops(op:TOpCG;var op1,op2:TAsmOp);
begin
case op of
OP_ADD :
begin
op1:=A_ADD;
op2:=A_ADC;
end;
OP_SUB :
begin
op1:=A_SUB;
op2:=A_SBB;
end;
OP_XOR :
begin
op1:=A_XOR;
op2:=A_XOR;
end;
OP_OR :
begin
op1:=A_OR;
op2:=A_OR;
end;
OP_AND :
begin
op1:=A_AND;
op2:=A_AND;
end;
else
internalerror(200203241);
end;
end;
procedure tcg64f386.a_op64_ref_reg(list : TAsmList;op:TOpCG;size : tcgsize;const ref : treference;reg : tregister64);
var
op1,op2 : TAsmOp;
tempref : treference;
begin
if not(op in [OP_NEG,OP_NOT]) then
begin
get_64bit_ops(op,op1,op2);
tempref:=ref;
tcgx86(cg).make_simple_ref(list,tempref);
list.concat(taicpu.op_ref_reg(op1,S_L,tempref,reg.reglo));
inc(tempref.offset,4);
list.concat(taicpu.op_ref_reg(op2,S_L,tempref,reg.reghi));
end
else
begin
a_load64_ref_reg(list,ref,reg);
a_op64_reg_reg(list,op,size,reg,reg);
end;
end;
procedure tcg64f386.a_op64_reg_reg(list : TAsmList;op:TOpCG;size : tcgsize;regsrc,regdst : tregister64);
var
op1,op2 : TAsmOp;
begin
case op of
OP_NEG :
begin
if (regsrc.reglo<>regdst.reglo) then
a_load64_reg_reg(list,regsrc,regdst);
list.concat(taicpu.op_reg(A_NOT,S_L,regdst.reghi));
list.concat(taicpu.op_reg(A_NEG,S_L,regdst.reglo));
list.concat(taicpu.op_const_reg(A_SBB,S_L,-1,regdst.reghi));
exit;
end;
OP_NOT :
begin
if (regsrc.reglo<>regdst.reglo) then
a_load64_reg_reg(list,regsrc,regdst);
list.concat(taicpu.op_reg(A_NOT,S_L,regdst.reghi));
list.concat(taicpu.op_reg(A_NOT,S_L,regdst.reglo));
exit;
end;
end;
get_64bit_ops(op,op1,op2);
list.concat(taicpu.op_reg_reg(op1,S_L,regsrc.reglo,regdst.reglo));
list.concat(taicpu.op_reg_reg(op2,S_L,regsrc.reghi,regdst.reghi));
end;
procedure tcg64f386.a_op64_const_reg(list : TAsmList;op:TOpCG;size : tcgsize;value : int64;reg : tregister64);
var
op1,op2 : TAsmOp;
begin
case op of
OP_AND,OP_OR,OP_XOR:
begin
cg.a_op_const_reg(list,op,OS_32,tcgint(lo(value)),reg.reglo);
cg.a_op_const_reg(list,op,OS_32,tcgint(hi(value)),reg.reghi);
end;
OP_ADD, OP_SUB:
begin
// can't use a_op_const_ref because this may use dec/inc
get_64bit_ops(op,op1,op2);
list.concat(taicpu.op_const_reg(op1,S_L,aint(lo(value)),reg.reglo));
list.concat(taicpu.op_const_reg(op2,S_L,aint(hi(value)),reg.reghi));
end;
else
internalerror(200204021);
end;
end;
procedure tcg64f386.a_op64_const_ref(list : TAsmList;op:TOpCG;size : tcgsize;value : int64;const ref : treference);
var
op1,op2 : TAsmOp;
tempref : treference;
begin
tempref:=ref;
tcgx86(cg).make_simple_ref(list,tempref);
case op of
OP_AND,OP_OR,OP_XOR:
begin
cg.a_op_const_ref(list,op,OS_32,tcgint(lo(value)),tempref);
inc(tempref.offset,4);
cg.a_op_const_ref(list,op,OS_32,tcgint(hi(value)),tempref);
end;
OP_ADD, OP_SUB:
begin
get_64bit_ops(op,op1,op2);
// can't use a_op_const_ref because this may use dec/inc
list.concat(taicpu.op_const_ref(op1,S_L,aint(lo(value)),tempref));
inc(tempref.offset,4);
list.concat(taicpu.op_const_ref(op2,S_L,aint(hi(value)),tempref));
end;
else
internalerror(200204022);
end;
end;
procedure create_codegen;
begin
cg := tcg386.create;
cg64 := tcg64f386.create;
end;
end.
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