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c7100799ed
fpc/compiler/powerpc/cgcpu.pas
Jonas Maebe 0caee5b45b + support to use r0 for ppc/ppc64 when compiling the compiler with 
-duser0. Not active by default because generates wrong code due
    to bug in the register allocator

git-svn-id: trunk@7261 -
2007-05-04 14:52:05 +00:00

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{
Copyright (c) 1998-2002 by Florian Klaempfl
This unit implements the code generator for the PowerPC
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,symtype,symdef,
cgbase,cgobj,cgppc,
aasmbase,aasmcpu,aasmtai,aasmdata,
cpubase,cpuinfo,cgutils,cg64f32,rgcpu,
parabase;
type
tcgppc = class(tcgppcgen)
procedure init_register_allocators;override;
procedure done_register_allocators;override;
{ passing parameters, per default the parameter is pushed }
{ nr gives the number of the parameter (enumerated from }
{ left to right), this allows to move the parameter to }
{ register, if the cpu supports register calling }
{ conventions }
procedure a_param_ref(list : TAsmList;size : tcgsize;const r : treference;const paraloc : tcgpara);override;
procedure a_call_name(list : TAsmList;const s : string);override;
procedure a_call_reg(list : TAsmList;reg: tregister); override;
procedure a_op_const_reg(list : TAsmList; Op: TOpCG; size: TCGSize; a: aint; reg: TRegister); override;
procedure a_op_reg_reg(list : TAsmList; Op: TOpCG; size: TCGSize; src, dst: TRegister); override;
procedure a_op_const_reg_reg(list: TAsmList; op: TOpCg;
size: tcgsize; a: aint; src, dst: tregister); override;
procedure a_op_reg_reg_reg(list: TAsmList; op: TOpCg;
size: tcgsize; src1, src2, dst: tregister); override;
{ move instructions }
procedure a_load_const_reg(list : TAsmList; size: tcgsize; a : aint;reg : tregister);override;
procedure a_load_ref_reg(list : TAsmList; fromsize, tosize : tcgsize;const Ref : treference;reg : tregister);override;
procedure a_load_reg_reg(list : TAsmList; fromsize, tosize : tcgsize;reg1,reg2 : tregister);override;
procedure a_load_subsetreg_reg(list : TAsmList; subsetsize: tcgsize;
tosize: tcgsize; const sreg: tsubsetregister; destreg: tregister); override;
procedure a_load_subsetreg_subsetreg(list: TAsmlist; fromsubsetsize, tosubsetsize: tcgsize; const fromsreg, tosreg: tsubsetregister); override;
{ comparison operations }
procedure a_cmp_const_reg_label(list : TAsmList;size : tcgsize;cmp_op : topcmp;a : aint;reg : tregister;
l : tasmlabel);override;
procedure a_cmp_reg_reg_label(list : TAsmList;size : tcgsize;cmp_op : topcmp;reg1,reg2 : tregister;l : tasmlabel); override;
procedure a_jmp_name(list : TAsmList;const s : string); override;
procedure a_jmp_always(list : TAsmList;l: tasmlabel); override;
procedure a_jmp_flags(list : TAsmList;const f : TResFlags;l: tasmlabel); override;
procedure g_flags2reg(list: TAsmList; size: TCgSize; const f: TResFlags; reg: TRegister); override;
procedure g_proc_entry(list : TAsmList;localsize : longint;nostackframe:boolean);override;
procedure g_proc_exit(list : TAsmList;parasize : longint;nostackframe:boolean); override;
procedure g_save_standard_registers(list:TAsmList); override;
procedure g_restore_standard_registers(list:TAsmList); override;
procedure g_concatcopy(list : TAsmList;const source,dest : treference;len : aint);override;
{ find out whether a is of the form 11..00..11b or 00..11...00. If }
{ that's the case, we can use rlwinm to do an AND operation }
function get_rlwi_const(a: aint; var l1, l2: longint): boolean;
protected
procedure a_load_regconst_subsetreg_intern(list : TAsmList; fromsize, subsetsize: tcgsize; fromreg: tregister; const sreg: tsubsetregister; slopt: tsubsetloadopt); override;
private
(* NOT IN USE: *)
procedure g_stackframe_entry_mac(list : TAsmList;localsize : longint);
(* NOT IN USE: *)
procedure g_return_from_proc_mac(list : TAsmList;parasize : aint);
{ clear out potential overflow bits from 8 or 16 bit operations }
{ the upper 24/16 bits of a register after an operation }
procedure maybeadjustresult(list: TAsmList; op: TOpCg; size: tcgsize; dst: tregister);
{ Make sure ref is a valid reference for the PowerPC and sets the }
{ base to the value of the index if (base = R_NO). }
{ Returns true if the reference contained a base, index and an }
{ offset or symbol, in which case the base will have been changed }
{ to a tempreg (which has to be freed by the caller) containing }
{ the sum of part of the original reference }
function fixref(list: TAsmList; var ref: treference): boolean; override;
{ returns whether a reference can be used immediately in a powerpc }
{ instruction }
function issimpleref(const ref: treference): boolean;
function save_regs(list : TAsmList):longint;
procedure restore_regs(list : TAsmList);
end;
tcg64fppc = class(tcg64f32)
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_reg_reg(list: TAsmList;op:TOpCG;size : tcgsize;value : int64;regsrc,regdst : tregister64);override;
procedure a_op64_reg_reg_reg(list: TAsmList;op:TOpCG;size : tcgsize;regsrc1,regsrc2,regdst : tregister64);override;
end;
const
TOpCG2AsmOpConstLo: Array[topcg] of TAsmOp = (A_NONE,A_MR,A_ADDI,A_ANDI_,A_DIVWU,
A_DIVW,A_MULLW, A_MULLW, A_NONE,A_NONE,A_ORI,
A_SRAWI,A_SLWI,A_SRWI,A_SUBI,A_XORI);
TOpCG2AsmOpConstHi: Array[topcg] of TAsmOp = (A_NONE,A_MR,A_ADDIS,A_ANDIS_,
A_DIVWU,A_DIVW, A_MULLW,A_MULLW,A_NONE,A_NONE,
A_ORIS,A_NONE, A_NONE,A_NONE,A_SUBIS,A_XORIS);
implementation
uses
globals,verbose,systems,cutils,
symconst,symsym,fmodule,
rgobj,tgobj,cpupi,procinfo,paramgr;
procedure tcgppc.init_register_allocators;
begin
inherited init_register_allocators;
if target_info.system=system_powerpc_darwin then
begin
{
if pi_needs_got in current_procinfo.flags then
begin
current_procinfo.got:=NR_R31;
rg[R_INTREGISTER]:=trgcpu.create(R_INTREGISTER,R_SUBWHOLE,
[RS_R2,RS_R3,RS_R4,RS_R5,RS_R6,RS_R7,RS_R8,
RS_R9,RS_R10,RS_R11,RS_R12,RS_R30,RS_R29,
RS_R28,RS_R27,RS_R26,RS_R25,RS_R24,RS_R23,RS_R22,
RS_R21,RS_R20,RS_R19,RS_R18,RS_R17,RS_R16,RS_R15,
RS_R14,RS_R13],first_int_imreg,[]);
end
else}
rg[R_INTREGISTER]:=trgintcpu.create(R_INTREGISTER,R_SUBWHOLE,
[{$ifdef user0} RS_R0,{$endif} RS_R2,RS_R3,RS_R4,RS_R5,RS_R6,RS_R7,RS_R8,
RS_R9,RS_R10,RS_R11,RS_R12,RS_R31,RS_R30,RS_R29,
RS_R28,RS_R27,RS_R26,RS_R25,RS_R24,RS_R23,RS_R22,
RS_R21,RS_R20,RS_R19,RS_R18,RS_R17,RS_R16,RS_R15,
RS_R14,RS_R13],first_int_imreg,[]);
end
else
rg[R_INTREGISTER]:=trgintcpu.create(R_INTREGISTER,R_SUBWHOLE,
[{$ifdef user0} RS_R0,{$endif}RS_R3,RS_R4,RS_R5,RS_R6,RS_R7,RS_R8,
RS_R9,RS_R10,RS_R11,RS_R12,RS_R31,RS_R30,RS_R29,
RS_R28,RS_R27,RS_R26,RS_R25,RS_R24,RS_R23,RS_R22,
RS_R21,RS_R20,RS_R19,RS_R18,RS_R17,RS_R16,RS_R15,
RS_R14,RS_R13],first_int_imreg,[]);
rg[R_FPUREGISTER]:=trgcpu.create(R_FPUREGISTER,R_SUBNONE,
[RS_F0,RS_F1,RS_F2,RS_F3,RS_F4,RS_F5,RS_F6,RS_F7,RS_F8,RS_F9,
RS_F10,RS_F11,RS_F12,RS_F13,RS_F31,RS_F30,RS_F29,RS_F28,RS_F27,
RS_F26,RS_F25,RS_F24,RS_F23,RS_F22,RS_F21,RS_F20,RS_F19,RS_F18,
RS_F17,RS_F16,RS_F15,RS_F14],first_fpu_imreg,[]);
{$warning FIX ME}
rg[R_MMREGISTER]:=trgcpu.create(R_MMREGISTER,R_SUBNONE,
[RS_M0,RS_M1,RS_M2],first_mm_imreg,[]);
end;
procedure tcgppc.done_register_allocators;
begin
rg[R_INTREGISTER].free;
rg[R_FPUREGISTER].free;
rg[R_MMREGISTER].free;
inherited done_register_allocators;
end;
procedure tcgppc.a_param_ref(list : TAsmList;size : tcgsize;const r : treference;const paraloc : tcgpara);
var
tmpref, ref: treference;
location: pcgparalocation;
sizeleft: aint;
begin
location := paraloc.location;
tmpref := r;
sizeleft := paraloc.intsize;
while assigned(location) do
begin
case location^.loc of
LOC_REGISTER,LOC_CREGISTER:
begin
{$ifndef cpu64bit}
if (sizeleft <> 3) then
begin
a_load_ref_reg(list,location^.size,location^.size,tmpref,location^.register);
end
else
begin
a_load_ref_reg(list,OS_16,OS_16,tmpref,location^.register);
a_reg_alloc(list,NR_R0);
inc(tmpref.offset,2);
a_load_ref_reg(list,OS_8,OS_8,tmpref,newreg(R_INTREGISTER,RS_R0,R_SUBNONE));
a_op_const_reg(list,OP_SHL,OS_INT,16,location^.register);
list.concat(taicpu.op_reg_reg_const_const_const(A_RLWIMI,location^.register,newreg(R_INTREGISTER,RS_R0,R_SUBNONE),8,16,31-8));
a_reg_dealloc(list,NR_R0);
dec(tmpref.offset,2);
end;
{$else not cpu64bit}
{$error add 64 bit support for non power of 2 loads in a_param_ref}
{$endif not cpu64bit}
end;
LOC_REFERENCE:
begin
reference_reset_base(ref,location^.reference.index,location^.reference.offset);
g_concatcopy(list,tmpref,ref,sizeleft);
if assigned(location^.next) then
internalerror(2005010710);
end;
LOC_FPUREGISTER,LOC_CFPUREGISTER:
case location^.size of
OS_F32, OS_F64:
a_loadfpu_ref_reg(list,location^.size,location^.size,tmpref,location^.register);
else
internalerror(2002072801);
end;
LOC_VOID:
begin
// nothing to do
end;
else
internalerror(2002081103);
end;
inc(tmpref.offset,tcgsize2size[location^.size]);
dec(sizeleft,tcgsize2size[location^.size]);
location := location^.next;
end;
end;
{ calling a procedure by name }
procedure tcgppc.a_call_name(list : TAsmList;const s : string);
begin
{ MacOS: The linker on MacOS (PPCLink) inserts a call to glue code,
if it is a cross-TOC call. If so, it also replaces the NOP
with some restore code.}
if (target_info.system <> system_powerpc_darwin) then
begin
list.concat(taicpu.op_sym(A_BL,current_asmdata.RefAsmSymbol(s)));
if target_info.system=system_powerpc_macos then
list.concat(taicpu.op_none(A_NOP));
end
else
list.concat(taicpu.op_sym(A_BL,get_darwin_call_stub(s)));
{
the compiler does not properly set this flag anymore in pass 1, and
for now we only need it after pass 2 (I hope) (JM)
if not(pi_do_call in current_procinfo.flags) then
internalerror(2003060703);
}
include(current_procinfo.flags,pi_do_call);
end;
{ calling a procedure by address }
procedure tcgppc.a_call_reg(list : TAsmList;reg: tregister);
var
tmpreg : tregister;
tmpref : treference;
begin
if target_info.system=system_powerpc_macos then
begin
{Generate instruction to load the procedure address from
the transition vector.}
//TODO: Support cross-TOC calls.
tmpreg := rg[R_INTREGISTER].getregister(list,R_SUBWHOLE);
reference_reset(tmpref);
tmpref.offset := 0;
//tmpref.symaddr := refs_full;
tmpref.base:= reg;
list.concat(taicpu.op_reg_ref(A_LWZ,tmpreg,tmpref));
end
else
tmpreg:=reg;
inherited a_call_reg(list,tmpreg);
end;
{********************** load instructions ********************}
procedure tcgppc.a_load_const_reg(list : TAsmList; size: TCGSize; a : aint; reg : TRegister);
begin
if not(size in [OS_8,OS_S8,OS_16,OS_S16,OS_32,OS_S32]) then
internalerror(2002090902);
if (a >= low(smallint)) and
(a <= high(smallint)) then
list.concat(taicpu.op_reg_const(A_LI,reg,smallint(a)))
else if ((a and $ffff) <> 0) then
begin
list.concat(taicpu.op_reg_const(A_LI,reg,smallint(a and $ffff)));
if ((a shr 16) <> 0) or
(smallint(a and $ffff) < 0) then
list.concat(taicpu.op_reg_reg_const(A_ADDIS,reg,reg,
smallint((a shr 16)+ord(smallint(a and $ffff) < 0))))
end
else
list.concat(taicpu.op_reg_const(A_LIS,reg,smallint(a shr 16)));
end;
procedure tcgppc.a_load_ref_reg(list : TAsmList; fromsize,tosize : tcgsize;const ref: treference;reg : tregister);
const
LoadInstr: Array[OS_8..OS_S32,boolean, boolean] of TAsmOp =
{ indexed? updating?}
(((A_LBZ,A_LBZU),(A_LBZX,A_LBZUX)),
((A_LHZ,A_LHZU),(A_LHZX,A_LHZUX)),
((A_LWZ,A_LWZU),(A_LWZX,A_LWZUX)),
{ 64bit stuff should be handled separately }
((A_NONE,A_NONE),(A_NONE,A_NONE)),
{ 128bit stuff too }
((A_NONE,A_NONE),(A_NONE,A_NONE)),
{ there's no load-byte-with-sign-extend :( }
((A_LBZ,A_LBZU),(A_LBZX,A_LBZUX)),
((A_LHA,A_LHAU),(A_LHAX,A_LHAUX)),
((A_LWZ,A_LWZU),(A_LWZX,A_LWZUX)));
var
op: tasmop;
ref2: treference;
begin
{ TODO: optimize/take into consideration fromsize/tosize. Will }
{ probably only matter for OS_S8 loads though }
if not(fromsize in [OS_8,OS_S8,OS_16,OS_S16,OS_32,OS_S32]) then
internalerror(2002090902);
ref2 := ref;
fixref(list,ref2);
{ the caller is expected to have adjusted the reference already }
{ in this case }
if (TCGSize2Size[fromsize] >= TCGSize2Size[tosize]) then
fromsize := tosize;
op := loadinstr[fromsize,ref2.index<>NR_NO,false];
a_load_store(list,op,reg,ref2);
{ sign extend shortint if necessary, since there is no }
{ load instruction that does that automatically (JM) }
if fromsize = OS_S8 then
list.concat(taicpu.op_reg_reg(A_EXTSB,reg,reg));
end;
procedure tcgppc.a_load_reg_reg(list : TAsmList;fromsize, tosize : tcgsize;reg1,reg2 : tregister);
var
instr: taicpu;
begin
if (tcgsize2size[fromsize] > tcgsize2size[tosize]) or
((tcgsize2size[fromsize] = tcgsize2size[tosize]) and
(fromsize <> tosize)) or
{ needs to mask out the sign in the top 16 bits }
((fromsize = OS_S8) and
(tosize = OS_16)) then
case tosize of
OS_8:
instr := taicpu.op_reg_reg_const_const_const(A_RLWINM,
reg2,reg1,0,31-8+1,31);
OS_S8:
instr := taicpu.op_reg_reg(A_EXTSB,reg2,reg1);
OS_16:
instr := taicpu.op_reg_reg_const_const_const(A_RLWINM,
reg2,reg1,0,31-16+1,31);
OS_S16:
instr := taicpu.op_reg_reg(A_EXTSH,reg2,reg1);
OS_32,OS_S32:
instr := taicpu.op_reg_reg(A_MR,reg2,reg1);
else internalerror(2002090901);
end
else
instr := taicpu.op_reg_reg(A_MR,reg2,reg1);
list.concat(instr);
rg[R_INTREGISTER].add_move_instruction(instr);
end;
procedure tcgppc.a_load_subsetreg_reg(list : TAsmList; subsetsize, tosize: tcgsize; const sreg: tsubsetregister; destreg: tregister);
begin
if (sreg.bitlen <> sizeof(aint)*8) then
begin
list.concat(taicpu.op_reg_reg_const_const_const(A_RLWINM,destreg,
sreg.subsetreg,(32-sreg.startbit) and 31,32-sreg.bitlen,31));
{ types with a negative lower bound are always a base type (8, 16, 32 bits) }
if (subsetsize in [OS_S8..OS_S128]) then
if ((sreg.bitlen mod 8) = 0) then
begin
a_load_reg_reg(list,tcgsize2unsigned[subsetsize],subsetsize,destreg,destreg);
a_load_reg_reg(list,subsetsize,tosize,destreg,destreg);
end
else
begin
a_op_const_reg(list,OP_SHL,OS_INT,32-sreg.bitlen,destreg);
a_op_const_reg(list,OP_SAR,OS_INT,32-sreg.bitlen,destreg);
end;
end
else
a_load_reg_reg(list,subsetsize,tosize,sreg.subsetreg,destreg);
end;
procedure tcgppc.a_load_regconst_subsetreg_intern(list : TAsmList; fromsize, subsetsize: tcgsize; fromreg: tregister; const sreg: tsubsetregister; slopt: tsubsetloadopt);
begin
if (slopt in [SL_SETZERO,SL_SETMAX]) then
inherited a_load_regconst_subsetreg_intern(list,fromsize,subsetsize,fromreg,sreg,slopt)
else if (sreg.bitlen <> sizeof(aint) * 8) then
list.concat(taicpu.op_reg_reg_const_const_const(A_RLWIMI,sreg.subsetreg,fromreg,
sreg.startbit,32-sreg.startbit-sreg.bitlen,31-sreg.startbit))
else
a_load_reg_reg(list,fromsize,subsetsize,fromreg,sreg.subsetreg);
end;
procedure tcgppc.a_load_subsetreg_subsetreg(list: TAsmlist; fromsubsetsize, tosubsetsize: tcgsize; const fromsreg, tosreg: tsubsetregister);
begin
if (fromsreg.bitlen >= tosreg.bitlen) then
list.concat(taicpu.op_reg_reg_const_const_const(A_RLWIMI,tosreg.subsetreg, fromsreg.subsetreg,
(tosreg.startbit-fromsreg.startbit) and 31,
32-tosreg.startbit-tosreg.bitlen,31-tosreg.startbit))
else
inherited a_load_subsetreg_subsetreg(list,fromsubsetsize,tosubsetsize,fromsreg,tosreg);
end;
procedure tcgppc.a_op_const_reg(list : TAsmList; Op: TOpCG; size: TCGSize; a: aint; reg: TRegister);
begin
a_op_const_reg_reg(list,op,size,a,reg,reg);
end;
procedure tcgppc.a_op_reg_reg(list : TAsmList; Op: TOpCG; size: TCGSize; src, dst: TRegister);
begin
a_op_reg_reg_reg(list,op,size,src,dst,dst);
end;
procedure tcgppc.maybeadjustresult(list: TAsmList; op: TOpCg; size: tcgsize; dst: tregister);
const
overflowops = [OP_MUL,OP_SHL,OP_ADD,OP_SUB,OP_NOT,OP_NEG];
begin
if (op in overflowops) and
(size in [OS_8,OS_S8,OS_16,OS_S16]) then
a_load_reg_reg(list,OS_32,size,dst,dst);
end;
procedure tcgppc.a_op_const_reg_reg(list: TAsmList; op: TOpCg;
size: tcgsize; a: aint; src, dst: tregister);
var
l1,l2: longint;
oplo, ophi: tasmop;
scratchreg: tregister;
useReg, gotrlwi: boolean;
procedure do_lo_hi;
begin
list.concat(taicpu.op_reg_reg_const(oplo,dst,src,word(a)));
list.concat(taicpu.op_reg_reg_const(ophi,dst,dst,word(a shr 16)));
end;
begin
if (op = OP_MOVE) then
internalerror(2006031401);
if op = OP_SUB then
begin
a_op_const_reg_reg(list,OP_ADD,size,-a,src,dst);
exit;
end;
ophi := TOpCG2AsmOpConstHi[op];
oplo := TOpCG2AsmOpConstLo[op];
gotrlwi := get_rlwi_const(a,l1,l2);
if (op in [OP_AND,OP_OR,OP_XOR]) then
begin
if (a = 0) then
begin
if op = OP_AND then
list.concat(taicpu.op_reg_const(A_LI,dst,0))
else
a_load_reg_reg(list,size,size,src,dst);
exit;
end
else if (a = -1) then
begin
case op of
OP_OR:
list.concat(taicpu.op_reg_const(A_LI,dst,-1));
OP_XOR:
list.concat(taicpu.op_reg_reg(A_NOT,dst,src));
OP_AND:
a_load_reg_reg(list,size,size,src,dst);
end;
exit;
end
else if (aword(a) <= high(word)) and
((op <> OP_AND) or
not gotrlwi) then
begin
if ((size = OS_8) and
(byte(a) <> a)) or
((size = OS_S8) and
(shortint(a) <> a)) then
internalerror(200604142);
list.concat(taicpu.op_reg_reg_const(oplo,dst,src,word(a)));
{ and/or/xor -> cannot overflow in high 16 bits }
exit;
end;
{ all basic constant instructions also have a shifted form that }
{ works only on the highest 16bits, so if lo(a) is 0, we can }
{ use that one }
if (word(a) = 0) and
(not(op = OP_AND) or
not gotrlwi) then
begin
if (size in [OS_8,OS_S8,OS_16,OS_S16]) then
internalerror(200604141);
list.concat(taicpu.op_reg_reg_const(ophi,dst,src,word(a shr 16)));
exit;
end;
end
else if (op = OP_ADD) then
if a = 0 then
begin
a_load_reg_reg(list,size,size,src,dst);
exit
end
else if (a >= low(smallint)) and
(a <= high(smallint)) then
begin
list.concat(taicpu.op_reg_reg_const(A_ADDI,dst,src,smallint(a)));
maybeadjustresult(list,op,size,dst);
exit;
end;
{ otherwise, the instructions we can generate depend on the }
{ operation }
useReg := false;
case op of
OP_DIV,OP_IDIV:
if (a = 0) then
internalerror(200208103)
else if (a = 1) then
begin
a_load_reg_reg(list,OS_INT,OS_INT,src,dst);
exit
end
else if ispowerof2(a,l1) then
begin
case op of
OP_DIV:
list.concat(taicpu.op_reg_reg_const(A_SRWI,dst,src,l1));
OP_IDIV:
begin
list.concat(taicpu.op_reg_reg_const(A_SRAWI,dst,src,l1));
list.concat(taicpu.op_reg_reg(A_ADDZE,dst,dst));
end;
end;
exit;
end
else
usereg := true;
OP_IMUL, OP_MUL:
if (a = 0) then
begin
list.concat(taicpu.op_reg_const(A_LI,dst,0));
exit
end
else if (a = 1) then
begin
a_load_reg_reg(list,OS_INT,OS_INT,src,dst);
exit
end
else if ispowerof2(a,l1) then
list.concat(taicpu.op_reg_reg_const(A_SLWI,dst,src,l1))
else if (longint(a) >= low(smallint)) and
(longint(a) <= high(smallint)) then
list.concat(taicpu.op_reg_reg_const(A_MULLI,dst,src,smallint(a)))
else
usereg := true;
OP_ADD:
begin
list.concat(taicpu.op_reg_reg_const(oplo,dst,src,smallint(a)));
list.concat(taicpu.op_reg_reg_const(ophi,dst,dst,
smallint((a shr 16) + ord(smallint(a) < 0))));
end;
OP_OR:
{ try to use rlwimi }
if gotrlwi and
(src = dst) then
begin
scratchreg := rg[R_INTREGISTER].getregister(list,R_SUBWHOLE);
list.concat(taicpu.op_reg_const(A_LI,scratchreg,-1));
list.concat(taicpu.op_reg_reg_const_const_const(A_RLWIMI,dst,
scratchreg,0,l1,l2));
end
else
do_lo_hi;
OP_AND:
{ try to use rlwinm }
if gotrlwi then
list.concat(taicpu.op_reg_reg_const_const_const(A_RLWINM,dst,
src,0,l1,l2))
else
useReg := true;
OP_XOR:
do_lo_hi;
OP_SHL,OP_SHR,OP_SAR:
begin
if (a and 31) <> 0 Then
list.concat(taicpu.op_reg_reg_const(
TOpCG2AsmOpConstLo[Op],dst,src,a and 31))
else
a_load_reg_reg(list,size,size,src,dst);
if (a shr 5) <> 0 then
internalError(68991);
end
else
internalerror(200109091);
end;
{ if all else failed, load the constant in a register and then }
{ perform the operation }
if useReg then
begin
scratchreg := rg[R_INTREGISTER].getregister(list,R_SUBWHOLE);
a_load_const_reg(list,OS_32,a,scratchreg);
a_op_reg_reg_reg(list,op,OS_32,scratchreg,src,dst);
end;
maybeadjustresult(list,op,size,dst);
end;
procedure tcgppc.a_op_reg_reg_reg(list: TAsmList; op: TOpCg;
size: tcgsize; src1, src2, dst: tregister);
const
op_reg_reg_opcg2asmop: array[TOpCG] of tasmop =
(A_NONE,A_MR,A_ADD,A_AND,A_DIVWU,A_DIVW,A_MULLW,A_MULLW,A_NEG,A_NOT,A_OR,
A_SRAW,A_SLW,A_SRW,A_SUB,A_XOR);
begin
if (op = OP_MOVE) then
internalerror(2006031402);
case op of
OP_NEG,OP_NOT:
begin
list.concat(taicpu.op_reg_reg(op_reg_reg_opcg2asmop[op],dst,src1));
if (op = OP_NOT) and
not(size in [OS_32,OS_S32]) then
{ zero/sign extend result again }
a_load_reg_reg(list,OS_32,size,dst,dst);
end;
else
list.concat(taicpu.op_reg_reg_reg(op_reg_reg_opcg2asmop[op],dst,src2,src1));
end;
maybeadjustresult(list,op,size,dst);
end;
{*************** compare instructructions ****************}
procedure tcgppc.a_cmp_const_reg_label(list : TAsmList;size : tcgsize;cmp_op : topcmp;a : aint;reg : tregister;
l : tasmlabel);
var
scratch_register: TRegister;
signed: boolean;
begin
signed := cmp_op in [OC_GT,OC_LT,OC_GTE,OC_LTE,OC_EQ,OC_NE];
{ in the following case, we generate more efficient code when }
{ signed is false }
if (cmp_op in [OC_EQ,OC_NE]) and
(aword(a) >= $8000) and
(aword(a) <= $ffff) then
signed := false;
if signed then
if (a >= low(smallint)) and (a <= high(smallint)) Then
list.concat(taicpu.op_reg_reg_const(A_CMPWI,NR_CR0,reg,a))
else
begin
scratch_register := rg[R_INTREGISTER].getregister(list,R_SUBWHOLE);
a_load_const_reg(list,OS_32,a,scratch_register);
list.concat(taicpu.op_reg_reg_reg(A_CMPW,NR_CR0,reg,scratch_register));
end
else
if (aword(a) <= $ffff) then
list.concat(taicpu.op_reg_reg_const(A_CMPLWI,NR_CR0,reg,aword(a)))
else
begin
scratch_register := rg[R_INTREGISTER].getregister(list,R_SUBWHOLE);
a_load_const_reg(list,OS_32,a,scratch_register);
list.concat(taicpu.op_reg_reg_reg(A_CMPLW,NR_CR0,reg,scratch_register));
end;
a_jmp(list,A_BC,TOpCmp2AsmCond[cmp_op],0,l);
end;
procedure tcgppc.a_cmp_reg_reg_label(list : TAsmList;size : tcgsize;cmp_op : topcmp;
reg1,reg2 : tregister;l : tasmlabel);
var
op: tasmop;
begin
if cmp_op in [OC_GT,OC_LT,OC_GTE,OC_LTE] then
op := A_CMPW
else
op := A_CMPLW;
list.concat(taicpu.op_reg_reg_reg(op,NR_CR0,reg2,reg1));
a_jmp(list,A_BC,TOpCmp2AsmCond[cmp_op],0,l);
end;
procedure tcgppc.a_jmp_name(list : TAsmList;const s : string);
var
p : taicpu;
begin
if (target_info.system = system_powerpc_darwin) then
p := taicpu.op_sym(A_B,get_darwin_call_stub(s))
else
p := taicpu.op_sym(A_B,current_asmdata.RefAsmSymbol(s));
p.is_jmp := true;
list.concat(p)
end;
procedure tcgppc.a_jmp_always(list : TAsmList;l: tasmlabel);
begin
a_jmp(list,A_B,C_None,0,l);
end;
procedure tcgppc.a_jmp_flags(list : TAsmList;const f : TResFlags;l: tasmlabel);
var
c: tasmcond;
begin
c := flags_to_cond(f);
a_jmp(list,A_BC,c.cond,c.cr-RS_CR0,l);
end;
procedure tcgppc.g_flags2reg(list: TAsmList; size: TCgSize; const f: TResFlags; reg: TRegister);
var
testbit: byte;
bitvalue: boolean;
begin
{ get the bit to extract from the conditional register + its }
{ requested value (0 or 1) }
testbit := ((f.cr-RS_CR0) * 4);
case f.flag of
F_EQ,F_NE:
begin
inc(testbit,2);
bitvalue := f.flag = F_EQ;
end;
F_LT,F_GE:
begin
bitvalue := f.flag = F_LT;
end;
F_GT,F_LE:
begin
inc(testbit);
bitvalue := f.flag = F_GT;
end;
else
internalerror(200112261);
end;
{ load the conditional register in the destination reg }
list.concat(taicpu.op_reg(A_MFCR,reg));
{ we will move the bit that has to be tested to bit 0 by rotating }
{ left }
testbit := (testbit + 1) and 31;
{ extract bit }
list.concat(taicpu.op_reg_reg_const_const_const(
A_RLWINM,reg,reg,testbit,31,31));
{ if we need the inverse, xor with 1 }
if not bitvalue then
list.concat(taicpu.op_reg_reg_const(A_XORI,reg,reg,1));
end;
(*
procedure tcgppc.g_cond2reg(list: TAsmList; const f: TAsmCond; reg: TRegister);
var
testbit: byte;
bitvalue: boolean;
begin
{ get the bit to extract from the conditional register + its }
{ requested value (0 or 1) }
case f.simple of
false:
begin
{ we don't generate this in the compiler }
internalerror(200109062);
end;
true:
case f.cond of
C_None:
internalerror(200109063);
C_LT..C_NU:
begin
testbit := (ord(f.cr) - ord(R_CR0))*4;
inc(testbit,AsmCondFlag2BI[f.cond]);
bitvalue := AsmCondFlagTF[f.cond];
end;
C_T,C_F,C_DNZT,C_DNZF,C_DZT,C_DZF:
begin
testbit := f.crbit
bitvalue := AsmCondFlagTF[f.cond];
end;
else
internalerror(200109064);
end;
end;
{ load the conditional register in the destination reg }
list.concat(taicpu.op_reg_reg(A_MFCR,reg));
{ we will move the bit that has to be tested to bit 31 -> rotate }
{ left by bitpos+1 (remember, this is big-endian!) }
if bitpos <> 31 then
inc(bitpos)
else
bitpos := 0;
{ extract bit }
list.concat(taicpu.op_reg_reg_const_const_const(
A_RLWINM,reg,reg,bitpos,31,31));
{ if we need the inverse, xor with 1 }
if not bitvalue then
list.concat(taicpu.op_reg_reg_const(A_XORI,reg,reg,1));
end;
*)
{ *********** entry/exit code and address loading ************ }
procedure tcgppc.g_save_standard_registers(list:TAsmList);
begin
{ this work is done in g_proc_entry }
end;
procedure tcgppc.g_restore_standard_registers(list:TAsmList);
begin
{ this work is done in g_proc_exit }
end;
procedure tcgppc.g_proc_entry(list : TAsmList;localsize : longint;nostackframe:boolean);
{ generated the entry code of a procedure/function. Note: localsize is the }
{ sum of the size necessary for local variables and the maximum possible }
{ combined size of ALL the parameters of a procedure called by the current }
{ one. }
{ This procedure may be called before, as well as after g_return_from_proc }
{ is called. NOTE registers are not to be allocated through the register }
{ allocator here, because the register colouring has already occured !! }
var regcounter,firstregfpu,firstregint: TSuperRegister;
href : treference;
usesfpr,usesgpr,gotgot : boolean;
cond : tasmcond;
instr : taicpu;
begin
{ CR and LR only have to be saved in case they are modified by the current }
{ procedure, but currently this isn't checked, so save them always }
{ following is the entry code as described in "Altivec Programming }
{ Interface Manual", bar the saving of AltiVec registers }
a_reg_alloc(list,NR_STACK_POINTER_REG);
usesgpr := false;
usesfpr := false;
if not(po_assembler in current_procinfo.procdef.procoptions) then
begin
{ save link register? }
if (pi_do_call in current_procinfo.flags) or
([cs_lineinfo,cs_debuginfo,cs_profile] * current_settings.moduleswitches <> []) then
begin
a_reg_alloc(list,NR_R0);
{ save return address... }
{ warning: if this is no longer done via r0, or if r0 is }
{ added to the usable registers, adapt tcgppcgen.g_profilecode }
list.concat(taicpu.op_reg(A_MFLR,NR_R0));
{ ... in caller's frame }
case target_info.abi of
abi_powerpc_aix:
reference_reset_base(href,NR_STACK_POINTER_REG,LA_LR_AIX);
abi_powerpc_sysv:
reference_reset_base(href,NR_STACK_POINTER_REG,LA_LR_SYSV);
end;
list.concat(taicpu.op_reg_ref(A_STW,NR_R0,href));
if not(cs_profile in current_settings.moduleswitches) then
a_reg_dealloc(list,NR_R0);
end;
(*
{ save the CR if necessary in callers frame. }
if target_info.abi = abi_powerpc_aix then
if false then { Not needed at the moment. }
begin
a_reg_alloc(list,NR_R0);
list.concat(taicpu.op_reg_reg(A_MFSPR,NR_R0,NR_CR));
reference_reset_base(href,NR_STACK_POINTER_REG,LA_CR_AIX);
list.concat(taicpu.op_reg_ref(A_STW,NR_R0,href));
a_reg_dealloc(list,NR_R0);
end;
*)
firstregfpu := tppcprocinfo(current_procinfo).get_first_save_fpu_reg;
firstregint := tppcprocinfo(current_procinfo).get_first_save_int_reg;
usesgpr := firstregint <> 32;
usesfpr := firstregfpu <> 32;
if (tppcprocinfo(current_procinfo).needs_frame_pointer) then
begin
a_reg_alloc(list,NR_R12);
list.concat(taicpu.op_reg_reg(A_MR,NR_R12,NR_STACK_POINTER_REG));
end;
end;
{ no GOT pointer loaded yet }
gotgot:=false;
if usesfpr then
begin
{ save floating-point registers
if (cs_create_pic in current_settings.moduleswitches) and not(usesgpr) then
begin
a_call_name(current_asmdata.RefAsmSymbol('_savefpr_'+tostr(ord(firstregfpu)-ord(R_F14)+14)+'_g'));
gotgot:=true;
end
else
a_call_name(current_asmdata.RefAsmSymbol('_savefpr_'+tostr(ord(firstregfpu)-ord(R_F14)+14)));
}
reference_reset_base(href,NR_R1,-8);
for regcounter:=firstregfpu to RS_F31 do
begin
a_loadfpu_reg_ref(list,OS_F64,OS_F64,newreg(R_FPUREGISTER,regcounter,R_SUBNONE),href);
dec(href.offset,8);
end;
{ compute start of gpr save area }
inc(href.offset,4);
end
else
{ compute start of gpr save area }
reference_reset_base(href,NR_R1,-4);
{ save gprs and fetch GOT pointer }
if usesgpr then
begin
{
if cs_create_pic in current_settings.moduleswitches then
begin
a_call_name(current_asmdata.RefAsmSymbol('_savegpr_'+tostr(ord(firstreggpr)-ord(R_14)+14)+'_g'));
gotgot:=true;
end
else
a_call_name(current_asmdata.RefAsmSymbol('_savegpr_'+tostr(ord(firstreggpr)-ord(R_14)+14)))
}
if (firstregint <= RS_R22) or
((cs_opt_size in current_settings.optimizerswitches) and
{ with RS_R30 it's also already smaller, but too big a speed trade-off to make }
(firstregint <= RS_R29)) then
begin
dec(href.offset,(RS_R31-firstregint)*sizeof(aint));
list.concat(taicpu.op_reg_ref(A_STMW,newreg(R_INTREGISTER,firstregint,R_SUBNONE),href));
end
else
for regcounter:=firstregint to RS_R31 do
begin
a_load_reg_ref(list,OS_INT,OS_INT,newreg(R_INTREGISTER,regcounter,R_SUBNONE),href);
dec(href.offset,4);
end;
end;
{ done in ncgutil because it may only be released after the parameters }
{ have been moved to their final resting place }
{ if (tppcprocinfo(current_procinfo).needs_frame_pointer) then }
{ a_reg_dealloc(list,NR_R12); }
{ if we didn't get the GOT pointer till now, we've to calculate it now }
(*
if not(gotgot) and (pi_needs_got in current_procinfo.flags) then
case target_info.system of
system_powerpc_darwin:
begin
list.concat(taicpu.op_reg_reg(A_MFSPR,NR_R0,NR_LR));
fillchar(cond,sizeof(cond),0);
cond.simple:=false;
cond.bo:=20;
cond.bi:=31;
instr:=taicpu.op_sym(A_BCL,current_procinfo.CurrGOTLabel);
instr.setcondition(cond);
list.concat(instr);
a_label(list,current_procinfo.CurrGOTLabel);
list.concat(taicpu.op_reg_reg(A_MFSPR,current_procinfo.got,NR_LR));
list.concat(taicpu.op_reg_reg(A_MTSPR,NR_LR,NR_R0));
end;
else
begin
a_reg_alloc(list,NR_R31);
{ place GOT ptr in r31 }
list.concat(taicpu.op_reg_reg(A_MFSPR,NR_R31,NR_LR));
end;
end;
*)
if (not nostackframe) and
tppcprocinfo(current_procinfo).needstackframe and
(localsize <> 0) then
begin
if (localsize <= high(smallint)) then
begin
reference_reset_base(href,NR_STACK_POINTER_REG,-localsize);
a_load_store(list,A_STWU,NR_STACK_POINTER_REG,href);
end
else
begin
reference_reset_base(href,NR_STACK_POINTER_REG,0);
{ can't use getregisterint here, the register colouring }
{ is already done when we get here }
href.index := NR_R11;
a_reg_alloc(list,href.index);
a_load_const_reg(list,OS_S32,-localsize,href.index);
a_load_store(list,A_STWUX,NR_STACK_POINTER_REG,href);
a_reg_dealloc(list,href.index);
end;
end;
{ save the CR if necessary ( !!! never done currently ) }
{ still need to find out where this has to be done for SystemV
a_reg_alloc(list,R_0);
list.concat(taicpu.op_reg_reg(A_MFSPR,R_0,R_CR);
list.concat(taicpu.op_reg_ref(A_STW,scratch_register,
new_reference(STACK_POINTER_REG,LA_CR)));
a_reg_dealloc(list,R_0);
}
{ now comes the AltiVec context save, not yet implemented !!! }
end;
procedure tcgppc.g_proc_exit(list : TAsmList;parasize : longint;nostackframe:boolean);
{ This procedure may be called before, as well as after g_stackframe_entry }
{ is called. NOTE registers are not to be allocated through the register }
{ allocator here, because the register colouring has already occured !! }
var
regcounter,firstregfpu,firstregint: TsuperRegister;
href : treference;
usesfpr,usesgpr,genret : boolean;
localsize: aint;
begin
{ AltiVec context restore, not yet implemented !!! }
usesfpr:=false;
usesgpr:=false;
if not (po_assembler in current_procinfo.procdef.procoptions) then
begin
firstregfpu := tppcprocinfo(current_procinfo).get_first_save_fpu_reg;
firstregint := tppcprocinfo(current_procinfo).get_first_save_int_reg;
usesgpr := firstregint <> 32;
usesfpr := firstregfpu <> 32;
end;
localsize:= tppcprocinfo(current_procinfo).calc_stackframe_size;
{ adjust r1 }
{ (register allocator is no longer valid at this time and an add of 0 }
{ is translated into a move, which is then registered with the register }
{ allocator, causing a crash }
if (not nostackframe) and
tppcprocinfo(current_procinfo).needstackframe and
(localsize <> 0) then
a_op_const_reg(list,OP_ADD,OS_ADDR,localsize,NR_R1);
{ no return (blr) generated yet }
genret:=true;
if usesfpr then
begin
reference_reset_base(href,NR_R1,-8);
for regcounter := firstregfpu to RS_F31 do
begin
a_loadfpu_ref_reg(list,OS_F64,OS_F64,href,newreg(R_FPUREGISTER,regcounter,R_SUBNONE));
dec(href.offset,8);
end;
inc(href.offset,4);
end
else
reference_reset_base(href,NR_R1,-4);
if (usesgpr) then
begin
if (firstregint <= RS_R22) or
((cs_opt_size in current_settings.optimizerswitches) and
{ with RS_R30 it's also already smaller, but too big a speed trade-off to make }
(firstregint <= RS_R29)) then
begin
dec(href.offset,(RS_R31-firstregint)*sizeof(aint));
list.concat(taicpu.op_reg_ref(A_LMW,newreg(R_INTREGISTER,firstregint,R_SUBNONE),href));
end
else
for regcounter:=firstregint to RS_R31 do
begin
a_load_ref_reg(list,OS_INT,OS_INT,href,newreg(R_INTREGISTER,regcounter,R_SUBNONE));
dec(href.offset,4);
end;
end;
(*
{ restore fprs and return }
if usesfpr then
begin
{ address of fpr save area to r11 }
r:=NR_R12;
list.concat(taicpu.op_reg_reg_const(A_ADDI,r,r,(ord(R_F31)-ord(firstregfpu.enum)+1)*8));
{
if (pi_do_call in current_procinfo.flags) then
a_call_name(current_asmdata.RefAsmSymbol('_restfpr_'+tostr(ord(firstregfpu)-ord(R_F14)+14)+'_x'))
else
{ leaf node => lr haven't to be restored }
a_call_name('_restfpr_'+tostr(ord(firstregfpu.enum)-ord(R_F14)+14)+'_l');
genret:=false;
}
end;
*)
{ if we didn't generate the return code, we've to do it now }
if genret then
begin
{ load link register? }
if not (po_assembler in current_procinfo.procdef.procoptions) then
begin
if (pi_do_call in current_procinfo.flags) then
begin
case target_info.abi of
abi_powerpc_aix:
reference_reset_base(href,NR_STACK_POINTER_REG,LA_LR_AIX);
abi_powerpc_sysv:
reference_reset_base(href,NR_STACK_POINTER_REG,LA_LR_SYSV);
end;
a_reg_alloc(list,NR_R0);
list.concat(taicpu.op_reg_ref(A_LWZ,NR_R0,href));
list.concat(taicpu.op_reg(A_MTLR,NR_R0));
a_reg_dealloc(list,NR_R0);
end;
(*
{ restore the CR if necessary from callers frame}
if target_info.abi = abi_powerpc_aix then
if false then { Not needed at the moment. }
begin
reference_reset_base(href,NR_STACK_POINTER_REG,LA_CR_AIX);
list.concat(taicpu.op_reg_ref(A_LWZ,NR_R0,href));
list.concat(taicpu.op_reg_reg(A_MTSPR,NR_R0,NR_CR));
a_reg_dealloc(list,NR_R0);
end;
*)
end;
list.concat(taicpu.op_none(A_BLR));
end;
end;
function tcgppc.save_regs(list : TAsmList):longint;
{Generates code which saves used non-volatile registers in
the save area right below the address the stackpointer point to.
Returns the actual used save area size.}
var regcounter,firstregfpu,firstreggpr: TSuperRegister;
usesfpr,usesgpr: boolean;
href : treference;
offset: aint;
regcounter2, firstfpureg: Tsuperregister;
begin
usesfpr:=false;
if not (po_assembler in current_procinfo.procdef.procoptions) then
begin
{ FIXME: has to be R_F14 instad of R_F8 for SYSV-64bit }
case target_info.abi of
abi_powerpc_aix:
firstfpureg := RS_F14;
abi_powerpc_sysv:
firstfpureg := RS_F9;
else
internalerror(2003122903);
end;
for regcounter:=firstfpureg to RS_F31 do
begin
if regcounter in rg[R_FPUREGISTER].used_in_proc then
begin
usesfpr:=true;
firstregfpu:=regcounter;
break;
end;
end;
end;
usesgpr:=false;
if not (po_assembler in current_procinfo.procdef.procoptions) then
for regcounter2:=RS_R13 to RS_R31 do
begin
if regcounter2 in rg[R_INTREGISTER].used_in_proc then
begin
usesgpr:=true;
firstreggpr:=regcounter2;
break;
end;
end;
offset:= 0;
{ save floating-point registers }
if usesfpr then
for regcounter := firstregfpu to RS_F31 do
begin
offset:= offset - 8;
reference_reset_base(href, NR_STACK_POINTER_REG, offset);
list.concat(taicpu.op_reg_ref(A_STFD, tregister(regcounter), href));
end;
(* Optimiztion in the future: a_call_name(list,'_savefXX'); *)
{ save gprs in gpr save area }
if usesgpr then
if firstreggpr < RS_R30 then
begin
offset:= offset - 4 * (RS_R31 - firstreggpr + 1);
reference_reset_base(href,NR_STACK_POINTER_REG,offset);
list.concat(taicpu.op_reg_ref(A_STMW,tregister(firstreggpr),href));
{STMW stores multiple registers}
end
else
begin
for regcounter := firstreggpr to RS_R31 do
begin
offset:= offset - 4;
reference_reset_base(href, NR_STACK_POINTER_REG, offset);
list.concat(taicpu.op_reg_ref(A_STW, newreg(R_INTREGISTER,regcounter,R_SUBWHOLE), href));
end;
end;
{ now comes the AltiVec context save, not yet implemented !!! }
save_regs:= -offset;
end;
procedure tcgppc.restore_regs(list : TAsmList);
{Generates code which restores used non-volatile registers from
the save area right below the address the stackpointer point to.}
var regcounter,firstregfpu,firstreggpr: TSuperRegister;
usesfpr,usesgpr: boolean;
href : treference;
offset: integer;
regcounter2, firstfpureg: Tsuperregister;
begin
usesfpr:=false;
if not (po_assembler in current_procinfo.procdef.procoptions) then
begin
{ FIXME: has to be R_F14 instad of R_F8 for SYSV-64bit }
case target_info.abi of
abi_powerpc_aix:
firstfpureg := RS_F14;
abi_powerpc_sysv:
firstfpureg := RS_F9;
else
internalerror(2003122903);
end;
for regcounter:=firstfpureg to RS_F31 do
begin
if regcounter in rg[R_FPUREGISTER].used_in_proc then
begin
usesfpr:=true;
firstregfpu:=regcounter;
break;
end;
end;
end;
usesgpr:=false;
if not (po_assembler in current_procinfo.procdef.procoptions) then
for regcounter2:=RS_R13 to RS_R31 do
begin
if regcounter2 in rg[R_INTREGISTER].used_in_proc then
begin
usesgpr:=true;
firstreggpr:=regcounter2;
break;
end;
end;
offset:= 0;
{ restore fp registers }
if usesfpr then
for regcounter := firstregfpu to RS_F31 do
begin
offset:= offset - 8;
reference_reset_base(href, NR_STACK_POINTER_REG, offset);
list.concat(taicpu.op_reg_ref(A_LFD, newreg(R_FPUREGISTER,regcounter,R_SUBWHOLE), href));
end;
(* Optimiztion in the future: a_call_name(list,'_restfXX'); *)
{ restore gprs }
if usesgpr then
if firstreggpr < RS_R30 then
begin
offset:= offset - 4 * (RS_R31 - firstreggpr + 1);
reference_reset_base(href,NR_STACK_POINTER_REG,offset); //-220
list.concat(taicpu.op_reg_ref(A_LMW,tregister(firstreggpr),href));
{LMW loads multiple registers}
end
else
begin
for regcounter := firstreggpr to RS_R31 do
begin
offset:= offset - 4;
reference_reset_base(href, NR_STACK_POINTER_REG, offset);
list.concat(taicpu.op_reg_ref(A_LWZ, newreg(R_INTREGISTER,regcounter,R_SUBWHOLE), href));
end;
end;
{ now comes the AltiVec context restore, not yet implemented !!! }
end;
procedure tcgppc.g_stackframe_entry_mac(list : TAsmList;localsize : longint);
(* NOT IN USE *)
{ generated the entry code of a procedure/function. Note: localsize is the }
{ sum of the size necessary for local variables and the maximum possible }
{ combined size of ALL the parameters of a procedure called by the current }
{ one }
const
macosLinkageAreaSize = 24;
var
href : treference;
registerSaveAreaSize : longint;
begin
if (localsize mod 8) <> 0 then
internalerror(58991);
{ CR and LR only have to be saved in case they are modified by the current }
{ procedure, but currently this isn't checked, so save them always }
{ following is the entry code as described in "Altivec Programming }
{ Interface Manual", bar the saving of AltiVec registers }
a_reg_alloc(list,NR_STACK_POINTER_REG);
a_reg_alloc(list,NR_R0);
{ save return address in callers frame}
list.concat(taicpu.op_reg_reg(A_MFSPR,NR_R0,NR_LR));
{ ... in caller's frame }
reference_reset_base(href,NR_STACK_POINTER_REG,8);
list.concat(taicpu.op_reg_ref(A_STW,NR_R0,href));
a_reg_dealloc(list,NR_R0);
{ save non-volatile registers in callers frame}
registerSaveAreaSize:= save_regs(list);
{ save the CR if necessary in callers frame ( !!! always done currently ) }
a_reg_alloc(list,NR_R0);
list.concat(taicpu.op_reg_reg(A_MFSPR,NR_R0,NR_CR));
reference_reset_base(href,NR_STACK_POINTER_REG,LA_CR_AIX);
list.concat(taicpu.op_reg_ref(A_STW,NR_R0,href));
a_reg_dealloc(list,NR_R0);
(*
{ save pointer to incoming arguments }
list.concat(taicpu.op_reg_reg_const(A_ORI,R_31,STACK_POINTER_REG,0));
*)
(*
a_reg_alloc(list,R_12);
{ 0 or 8 based on SP alignment }
list.concat(taicpu.op_reg_reg_const_const_const(A_RLWINM,
R_12,STACK_POINTER_REG,0,28,28));
{ add in stack length }
list.concat(taicpu.op_reg_reg_const(A_SUBFIC,R_12,R_12,
-localsize));
{ establish new alignment }
list.concat(taicpu.op_reg_reg_reg(A_STWUX,STACK_POINTER_REG,STACK_POINTER_REG,R_12));
a_reg_dealloc(list,R_12);
*)
{ allocate stack frame }
localsize:= align(localsize + macosLinkageAreaSize + registerSaveAreaSize, 16);
inc(localsize,tg.lasttemp);
localsize:=align(localsize,16);
//tppcprocinfo(current_procinfo).localsize:=localsize;
if (localsize <> 0) then
begin
if (localsize <= high(smallint)) then
begin
reference_reset_base(href,NR_STACK_POINTER_REG,-localsize);
a_load_store(list,A_STWU,NR_STACK_POINTER_REG,href);
end
else
begin
reference_reset_base(href,NR_STACK_POINTER_REG,0);
href.index := NR_R11;
a_reg_alloc(list,href.index);
a_load_const_reg(list,OS_S32,-localsize,href.index);
a_load_store(list,A_STWUX,NR_STACK_POINTER_REG,href);
a_reg_dealloc(list,href.index);
end;
end;
end;
procedure tcgppc.g_return_from_proc_mac(list : TAsmList;parasize : aint);
(* NOT IN USE *)
var
href : treference;
begin
a_reg_alloc(list,NR_R0);
{ restore stack pointer }
reference_reset_base(href,NR_STACK_POINTER_REG,LA_SP);
list.concat(taicpu.op_reg_ref(A_LWZ,NR_STACK_POINTER_REG,href));
(*
list.concat(taicpu.op_reg_reg_const(A_ORI,NR_STACK_POINTER_REG,R_31,0));
*)
{ restore the CR if necessary from callers frame
( !!! always done currently ) }
reference_reset_base(href,NR_STACK_POINTER_REG,LA_CR_AIX);
list.concat(taicpu.op_reg_ref(A_LWZ,NR_R0,href));
list.concat(taicpu.op_reg_reg(A_MTSPR,NR_R0,NR_CR));
a_reg_dealloc(list,NR_R0);
(*
{ restore return address from callers frame }
reference_reset_base(href,STACK_POINTER_REG,8);
list.concat(taicpu.op_reg_ref(A_LWZ,R_0,href));
*)
{ restore non-volatile registers from callers frame }
restore_regs(list);
(*
{ return to caller }
list.concat(taicpu.op_reg_reg(A_MTSPR,R_0,R_LR));
list.concat(taicpu.op_none(A_BLR));
*)
{ restore return address from callers frame }
reference_reset_base(href,NR_STACK_POINTER_REG,8);
list.concat(taicpu.op_reg_ref(A_LWZ,NR_R0,href));
{ return to caller }
list.concat(taicpu.op_reg_reg(A_MTSPR,NR_R0,NR_LR));
list.concat(taicpu.op_none(A_BLR));
end;
{ ************* concatcopy ************ }
{$ifndef ppc603}
const
maxmoveunit = 8;
{$else ppc603}
const
maxmoveunit = 4;
{$endif ppc603}
procedure tcgppc.g_concatcopy(list : TAsmList;const source,dest : treference;len : aint);
var
countreg: TRegister;
src, dst: TReference;
lab: tasmlabel;
count, count2: aint;
size: tcgsize;
copyreg: tregister;
begin
{$ifdef extdebug}
if len > high(longint) then
internalerror(2002072704);
{$endif extdebug}
if (references_equal(source,dest)) then
exit;
{ make sure short loads are handled as optimally as possible }
if (len <= maxmoveunit) and
(byte(len) in [1,2,4,8]) then
begin
if len < 8 then
begin
size := int_cgsize(len);
a_load_ref_ref(list,size,size,source,dest);
end
else
begin
copyreg := getfpuregister(list,OS_F64);
a_loadfpu_ref_reg(list,OS_F64,OS_F64,source,copyreg);
a_loadfpu_reg_ref(list,OS_F64,OS_F64,copyreg,dest);
end;
exit;
end;
count := len div maxmoveunit;
reference_reset(src);
reference_reset(dst);
{ load the address of source into src.base }
if (count > 4) or
not issimpleref(source) or
((source.index <> NR_NO) and
((source.offset + longint(len)) > high(smallint))) then
begin
src.base := rg[R_INTREGISTER].getregister(list,R_SUBWHOLE);
a_loadaddr_ref_reg(list,source,src.base);
end
else
begin
src := source;
end;
{ load the address of dest into dst.base }
if (count > 4) or
not issimpleref(dest) or
((dest.index <> NR_NO) and
((dest.offset + longint(len)) > high(smallint))) then
begin
dst.base := rg[R_INTREGISTER].getregister(list,R_SUBWHOLE);
a_loadaddr_ref_reg(list,dest,dst.base);
end
else
begin
dst := dest;
end;
{$ifndef ppc603}
if count > 4 then
{ generate a loop }
begin
{ the offsets are zero after the a_loadaddress_ref_reg and just }
{ have to be set to 8. I put an Inc there so debugging may be }
{ easier (should offset be different from zero here, it will be }
{ easy to notice in the generated assembler }
inc(dst.offset,8);
inc(src.offset,8);
list.concat(taicpu.op_reg_reg_const(A_SUBI,src.base,src.base,8));
list.concat(taicpu.op_reg_reg_const(A_SUBI,dst.base,dst.base,8));
countreg := rg[R_INTREGISTER].getregister(list,R_SUBWHOLE);
a_load_const_reg(list,OS_32,count,countreg);
copyreg := getfpuregister(list,OS_F64);
a_reg_sync(list,copyreg);
current_asmdata.getjumplabel(lab);
a_label(list, lab);
list.concat(taicpu.op_reg_reg_const(A_SUBIC_,countreg,countreg,1));
list.concat(taicpu.op_reg_ref(A_LFDU,copyreg,src));
list.concat(taicpu.op_reg_ref(A_STFDU,copyreg,dst));
a_jmp(list,A_BC,C_NE,0,lab);
a_reg_sync(list,copyreg);
len := len mod 8;
end;
count := len div 8;
if count > 0 then
{ unrolled loop }
begin
copyreg := getfpuregister(list,OS_F64);
for count2 := 1 to count do
begin
a_loadfpu_ref_reg(list,OS_F64,OS_F64,src,copyreg);
a_loadfpu_reg_ref(list,OS_F64,OS_F64,copyreg,dst);
inc(src.offset,8);
inc(dst.offset,8);
end;
len := len mod 8;
end;
if (len and 4) <> 0 then
begin
a_reg_alloc(list,NR_R0);
a_load_ref_reg(list,OS_32,OS_32,src,NR_R0);
a_load_reg_ref(list,OS_32,OS_32,NR_R0,dst);
inc(src.offset,4);
inc(dst.offset,4);
a_reg_dealloc(list,NR_R0);
end;
{$else not ppc603}
if count > 4 then
{ generate a loop }
begin
{ the offsets are zero after the a_loadaddress_ref_reg and just }
{ have to be set to 4. I put an Inc there so debugging may be }
{ easier (should offset be different from zero here, it will be }
{ easy to notice in the generated assembler }
inc(dst.offset,4);
inc(src.offset,4);
list.concat(taicpu.op_reg_reg_const(A_SUBI,src.base,src.base,4));
list.concat(taicpu.op_reg_reg_const(A_SUBI,dst.base,dst.base,4));
countreg := rg[R_INTREGISTER].getregister(list,R_SUBWHOLE);
a_load_const_reg(list,OS_32,count,countreg);
{ explicitely allocate R_0 since it can be used safely here }
{ (for holding date that's being copied) }
a_reg_alloc(list,NR_R0);
current_asmdata.getjumplabel(lab);
a_label(list, lab);
list.concat(taicpu.op_reg_reg_const(A_SUBIC_,countreg,countreg,1));
list.concat(taicpu.op_reg_ref(A_LWZU,NR_R0,src));
list.concat(taicpu.op_reg_ref(A_STWU,NR_R0,dst));
a_jmp(list,A_BC,C_NE,0,lab);
a_reg_dealloc(list,NR_R0);
len := len mod 4;
end;
count := len div 4;
if count > 0 then
{ unrolled loop }
begin
a_reg_alloc(list,NR_R0);
for count2 := 1 to count do
begin
a_load_ref_reg(list,OS_32,OS_32,src,NR_R0);
a_load_reg_ref(list,OS_32,OS_32,NR_R0,dst);
inc(src.offset,4);
inc(dst.offset,4);
end;
a_reg_dealloc(list,NR_R0);
len := len mod 4;
end;
{$endif not ppc603}
{ copy the leftovers }
if (len and 2) <> 0 then
begin
a_reg_alloc(list,NR_R0);
a_load_ref_reg(list,OS_16,OS_16,src,NR_R0);
a_load_reg_ref(list,OS_16,OS_16,NR_R0,dst);
inc(src.offset,2);
inc(dst.offset,2);
a_reg_dealloc(list,NR_R0);
end;
if (len and 1) <> 0 then
begin
a_reg_alloc(list,NR_R0);
a_load_ref_reg(list,OS_8,OS_8,src,NR_R0);
a_load_reg_ref(list,OS_8,OS_8,NR_R0,dst);
a_reg_dealloc(list,NR_R0);
end;
end;
{***************** This is private property, keep out! :) *****************}
function tcgppc.issimpleref(const ref: treference): boolean;
begin
if (ref.base = NR_NO) and
(ref.index <> NR_NO) then
internalerror(200208101);
result :=
not(assigned(ref.symbol)) and
(((ref.index = NR_NO) and
(ref.offset >= low(smallint)) and
(ref.offset <= high(smallint))) or
((ref.index <> NR_NO) and
(ref.offset = 0)));
end;
function tcgppc.fixref(list: TAsmList; var ref: treference): boolean;
var
tmpreg: tregister;
begin
result := false;
if (target_info.system = system_powerpc_darwin) and
assigned(ref.symbol) and
(ref.symbol.bind = AB_EXTERNAL) then
begin
tmpreg := g_indirect_sym_load(list,ref.symbol.name);
if (ref.base = NR_NO) then
ref.base := tmpreg
else if (ref.index = NR_NO) then
ref.index := tmpreg
else
begin
list.concat(taicpu.op_reg_reg_reg(A_ADD,tmpreg,ref.base,tmpreg));
ref.base := tmpreg;
end;
ref.symbol := nil;
end;
if (ref.base = NR_NO) then
begin
ref.base := ref.index;
ref.index := NR_NO;
end;
if (ref.base <> NR_NO) then
begin
if (ref.index <> NR_NO) and
((ref.offset <> 0) or assigned(ref.symbol)) then
begin
result := true;
tmpreg := rg[R_INTREGISTER].getregister(list,R_SUBWHOLE);
list.concat(taicpu.op_reg_reg_reg(
A_ADD,tmpreg,ref.base,ref.index));
ref.index := NR_NO;
ref.base := tmpreg;
end
end
else
if ref.index <> NR_NO then
internalerror(200208102);
end;
{ find out whether a is of the form 11..00..11b or 00..11...00. If }
{ that's the case, we can use rlwinm to do an AND operation }
function tcgppc.get_rlwi_const(a: aint; var l1, l2: longint): boolean;
var
temp : longint;
testbit : aint;
compare: boolean;
begin
get_rlwi_const := false;
if (a = 0) or (a = -1) then
exit;
{ start with the lowest bit }
testbit := 1;
{ check its value }
compare := boolean(a and testbit);
{ find out how long the run of bits with this value is }
{ (it's impossible that all bits are 1 or 0, because in that case }
{ this function wouldn't have been called) }
l1 := 31;
while (((a and testbit) <> 0) = compare) do
begin
testbit := testbit shl 1;
dec(l1);
end;
{ check the length of the run of bits that comes next }
compare := not compare;
l2 := l1;
while (((a and testbit) <> 0) = compare) and
(l2 >= 0) do
begin
testbit := testbit shl 1;
dec(l2);
end;
{ and finally the check whether the rest of the bits all have the }
{ same value }
compare := not compare;
temp := l2;
if temp >= 0 then
if (a shr (31-temp)) <> ((-ord(compare)) shr (31-temp)) then
exit;
{ we have done "not(not(compare))", so compare is back to its }
{ initial value. If the lowest bit was 0, a is of the form }
{ 00..11..00 and we need "rlwinm reg,reg,0,l2+1,l1", (+1 }
{ because l2 now contains the position of the last zero of the }
{ first run instead of that of the first 1) so switch l1 and l2 }
{ in that case (we will generate "rlwinm reg,reg,0,l1,l2") }
if not compare then
begin
temp := l1;
l1 := l2+1;
l2 := temp;
end
else
{ otherwise, l1 currently contains the position of the last }
{ zero instead of that of the first 1 of the second run -> +1 }
inc(l1);
{ the following is the same as "if l1 = -1 then l1 := 31;" }
l1 := l1 and 31;
l2 := l2 and 31;
get_rlwi_const := true;
end;
procedure tcg64fppc.a_op64_reg_reg(list : TAsmList;op:TOpCG;size : tcgsize;regsrc,regdst : tregister64);
begin
a_op64_reg_reg_reg(list,op,size,regsrc,regdst,regdst);
end;
procedure tcg64fppc.a_op64_const_reg(list : TAsmList;op:TOpCG;size : tcgsize;value : int64;reg : tregister64);
begin
a_op64_const_reg_reg(list,op,size,value,reg,reg);
end;
procedure tcg64fppc.a_op64_reg_reg_reg(list: TAsmList;op:TOpCG;size : tcgsize;regsrc1,regsrc2,regdst : tregister64);
begin
case op of
OP_AND,OP_OR,OP_XOR:
begin
cg.a_op_reg_reg_reg(list,op,OS_32,regsrc1.reglo,regsrc2.reglo,regdst.reglo);
cg.a_op_reg_reg_reg(list,op,OS_32,regsrc1.reghi,regsrc2.reghi,regdst.reghi);
end;
OP_ADD:
begin
list.concat(taicpu.op_reg_reg_reg(A_ADDC,regdst.reglo,regsrc1.reglo,regsrc2.reglo));
list.concat(taicpu.op_reg_reg_reg(A_ADDE,regdst.reghi,regsrc1.reghi,regsrc2.reghi));
end;
OP_SUB:
begin
list.concat(taicpu.op_reg_reg_reg(A_SUBC,regdst.reglo,regsrc2.reglo,regsrc1.reglo));
list.concat(taicpu.op_reg_reg_reg(A_SUBFE,regdst.reghi,regsrc1.reghi,regsrc2.reghi));
end;
else
internalerror(2002072801);
end;
end;
procedure tcg64fppc.a_op64_const_reg_reg(list: TAsmList;op:TOpCG;size : tcgsize;value : int64;regsrc,regdst : tregister64);
const
ops: array[boolean,1..3] of tasmop = ((A_ADDIC,A_ADDC,A_ADDZE),
(A_SUBIC,A_SUBC,A_ADDME));
var
tmpreg: tregister;
tmpreg64: tregister64;
issub: boolean;
begin
case op of
OP_AND,OP_OR,OP_XOR:
begin
cg.a_op_const_reg_reg(list,op,OS_32,aint(value),regsrc.reglo,regdst.reglo);
cg.a_op_const_reg_reg(list,op,OS_32,aint(value shr 32),regsrc.reghi,
regdst.reghi);
end;
OP_ADD, OP_SUB:
begin
if (value < 0) and
(value <> low(value)) then
begin
if op = OP_ADD then
op := OP_SUB
else
op := OP_ADD;
value := -value;
end;
if (longint(value) <> 0) then
begin
issub := op = OP_SUB;
if (value > 0) and
(value-ord(issub) <= 32767) then
begin
list.concat(taicpu.op_reg_reg_const(ops[issub,1],
regdst.reglo,regsrc.reglo,longint(value)));
list.concat(taicpu.op_reg_reg(ops[issub,3],
regdst.reghi,regsrc.reghi));
end
else if ((value shr 32) = 0) then
begin
tmpreg := tcgppc(cg).rg[R_INTREGISTER].getregister(list,R_SUBWHOLE);
cg.a_load_const_reg(list,OS_32,aint(value),tmpreg);
list.concat(taicpu.op_reg_reg_reg(ops[issub,2],
regdst.reglo,regsrc.reglo,tmpreg));
list.concat(taicpu.op_reg_reg(ops[issub,3],
regdst.reghi,regsrc.reghi));
end
else
begin
tmpreg64.reglo := tcgppc(cg).rg[R_INTREGISTER].getregister(list,R_SUBWHOLE);
tmpreg64.reghi := tcgppc(cg).rg[R_INTREGISTER].getregister(list,R_SUBWHOLE);
a_load64_const_reg(list,value,tmpreg64);
a_op64_reg_reg_reg(list,op,size,tmpreg64,regsrc,regdst);
end
end
else
begin
cg.a_load_reg_reg(list,OS_INT,OS_INT,regsrc.reglo,regdst.reglo);
cg.a_op_const_reg_reg(list,op,OS_32,aint(value shr 32),regsrc.reghi,
regdst.reghi);
end;
end;
else
internalerror(2002072802);
end;
end;
begin
cg := tcgppc.create;
cg64 :=tcg64fppc.create;
end.
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