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fpc/compiler/arm/narmadd.pas

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{
Copyright (c) 2000-2002 by Florian Klaempfl
Code generation for add nodes on the ARM
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 narmadd;
{$i fpcdefs.inc}
interface
uses
node,ncgadd,cpubase;
type
tarmaddnode = class(tcgaddnode)
private
function GetResFlags(unsigned:Boolean):TResFlags;
function GetFpuResFlags:TResFlags;
public
function use_fma : boolean;override;
function pass_1 : tnode;override;
function use_generic_mul32to64: boolean; override;
function use_generic_mul64bit: boolean; override;
protected
function first_addfloat: tnode; override;
procedure second_addordinal;override;
procedure second_addfloat;override;
procedure second_cmpfloat;override;
procedure second_cmpordinal;override;
procedure second_cmpsmallset;override;
procedure second_cmp64bit;override;
procedure second_add64bit;override;
end;
implementation
uses
globtype,verbose,globals,systems,
constexp,symdef,symtable,symtype,symconst,
aasmbase,aasmdata,aasmcpu,
defutil,htypechk,cgbase,cgutils,
cpuinfo,pass_1,pass_2,procinfo,
ncon,nadd,ncnv,ncal,nmat,
ncgutil,cgobj,cgcpu,
hlcgobj
;
{*****************************************************************************
TSparcAddNode
*****************************************************************************}
function tarmaddnode.GetResFlags(unsigned:Boolean):TResFlags;
begin
case NodeType of
equaln:
GetResFlags:=F_EQ;
unequaln:
GetResFlags:=F_NE;
else
if not(unsigned) then
begin
if nf_swapped in flags then
case NodeType of
ltn:
GetResFlags:=F_GT;
lten:
GetResFlags:=F_GE;
gtn:
GetResFlags:=F_LT;
gten:
GetResFlags:=F_LE;
else
internalerror(201408203);
end
else
case NodeType of
ltn:
GetResFlags:=F_LT;
lten:
GetResFlags:=F_LE;
gtn:
GetResFlags:=F_GT;
gten:
GetResFlags:=F_GE;
else
internalerror(201408204);
end;
end
else
begin
if nf_swapped in Flags then
case NodeType of
ltn:
GetResFlags:=F_HI;
lten:
GetResFlags:=F_CS;
gtn:
GetResFlags:=F_CC;
gten:
GetResFlags:=F_LS;
else
internalerror(201408205);
end
else
case NodeType of
ltn:
GetResFlags:=F_CC;
lten:
GetResFlags:=F_LS;
gtn:
GetResFlags:=F_HI;
gten:
GetResFlags:=F_CS;
else
internalerror(201408206);
end;
end;
end;
end;
function tarmaddnode.GetFpuResFlags:TResFlags;
begin
if nf_swapped in Flags then
internalerror(2014042001);
case NodeType of
equaln:
result:=F_EQ;
unequaln:
result:=F_NE;
ltn:
result:=F_MI;
lten:
result:=F_LS;
gtn:
result:=F_GT;
gten:
result:=F_GE;
else
internalerror(201408207);
end;
end;
function tarmaddnode.use_fma : boolean;
begin
Result:=FPUARM_HAS_FMA in fpu_capabilities[current_settings.fputype];
end;
procedure tarmaddnode.second_addfloat;
var
op : TAsmOp;
singleprec: boolean;
pf: TOpPostfix;
begin
pass_left_right;
if (nf_swapped in flags) then
swapleftright;
case current_settings.fputype of
fpu_fpa,
fpu_fpa10,
fpu_fpa11:
begin
{ force fpureg as location, left right doesn't matter
as both will be in a fpureg }
hlcg.location_force_fpureg(current_asmdata.CurrAsmList,left.location,left.resultdef,true);
hlcg.location_force_fpureg(current_asmdata.CurrAsmList,right.location,right.resultdef,true);
location_reset(location,LOC_FPUREGISTER,def_cgsize(resultdef));
location.register:=cg.getfpuregister(current_asmdata.CurrAsmList,location.size);
case nodetype of
addn :
op:=A_ADF;
muln :
op:=A_MUF;
subn :
op:=A_SUF;
slashn :
op:=A_DVF;
else
internalerror(200308313);
end;
current_asmdata.CurrAsmList.concat(setoppostfix(taicpu.op_reg_reg_reg(op,
location.register,left.location.register,right.location.register),
cgsize2fpuoppostfix[def_cgsize(resultdef)]));
end;
fpu_soft:
{ this case should be handled already by pass1 }
internalerror(2003082503);
else if FPUARM_HAS_VFP_DOUBLE in fpu_capabilities[current_settings.fputype] then
begin
{ force mmreg as location, left right doesn't matter
as both will be in a fpureg }
hlcg.location_force_mmregscalar(current_asmdata.CurrAsmList,left.location,left.resultdef,true);
hlcg.location_force_mmregscalar(current_asmdata.CurrAsmList,right.location,right.resultdef,true);
location_reset(location,LOC_MMREGISTER,def_cgsize(resultdef));
location.register:=cg.getmmregister(current_asmdata.CurrAsmList,location.size);
singleprec:=tfloatdef(left.resultdef).floattype=s32real;
if singleprec then
pf:=PF_F32
else
pf:=PF_F64;
case nodetype of
addn :
op:=A_VADD;
muln :
op:=A_VMUL;
subn :
op:=A_VSUB;
slashn :
op:=A_VDIV;
else
internalerror(2009111401);
end;
current_asmdata.CurrAsmList.concat(setoppostfix(taicpu.op_reg_reg_reg(op,
location.register,left.location.register,right.location.register),pf));
cg.maybe_check_for_fpu_exception(current_asmdata.CurrAsmList);
end
else if FPUARM_HAS_VFP_EXTENSION in fpu_capabilities[current_settings.fputype] then
begin
{ force mmreg as location, left right doesn't matter
as both will be in a fpureg }
hlcg.location_force_mmregscalar(current_asmdata.CurrAsmList,left.location,left.resultdef,true);
hlcg.location_force_mmregscalar(current_asmdata.CurrAsmList,right.location,right.resultdef,true);
location_reset(location,LOC_MMREGISTER,def_cgsize(resultdef));
location.register:=cg.getmmregister(current_asmdata.CurrAsmList,location.size);
case nodetype of
addn :
op:=A_VADD;
muln :
op:=A_VMUL;
subn :
op:=A_VSUB;
slashn :
op:=A_VDIV;
else
internalerror(2009111404);
end;
current_asmdata.CurrAsmList.concat(setoppostfix(taicpu.op_reg_reg_reg(op, location.register,left.location.register,right.location.register), PF_F32));
cg.maybe_check_for_fpu_exception(current_asmdata.CurrAsmList);
end
else
internalerror(200308251);
end;
end;
procedure tarmaddnode.second_cmpfloat;
var
op: TAsmOp;
pf: TOpPostfix;
begin
pass_left_right;
if (nf_swapped in flags) then
swapleftright;
location_reset(location,LOC_FLAGS,OS_NO);
location.resflags:=getresflags(false);
case current_settings.fputype of
fpu_fpa,
fpu_fpa10,
fpu_fpa11:
begin
{ force fpureg as location, left right doesn't matter
as both will be in a fpureg }
hlcg.location_force_fpureg(current_asmdata.CurrAsmList,left.location,left.resultdef,true);
hlcg.location_force_fpureg(current_asmdata.CurrAsmList,right.location,right.resultdef,true);
cg.a_reg_alloc(current_asmdata.CurrAsmList,NR_DEFAULTFLAGS);
if nodetype in [equaln,unequaln] then
current_asmdata.CurrAsmList.concat(setoppostfix(taicpu.op_reg_reg(A_CMF,
left.location.register,right.location.register),
cgsize2fpuoppostfix[def_cgsize(resultdef)]))
else
current_asmdata.CurrAsmList.concat(setoppostfix(taicpu.op_reg_reg(A_CMFE,
left.location.register,right.location.register),
cgsize2fpuoppostfix[def_cgsize(resultdef)]));
end;
else if FPUARM_HAS_VFP_DOUBLE in fpu_capabilities[current_settings.fputype] then
begin
hlcg.location_force_mmregscalar(current_asmdata.CurrAsmList,left.location,left.resultdef,true);
hlcg.location_force_mmregscalar(current_asmdata.CurrAsmList,right.location,right.resultdef,true);
if nodetype in [equaln,unequaln] then
op:=A_VCMP
else
op:=A_VCMPE;
if (tfloatdef(left.resultdef).floattype=s32real) then
pf:=PF_F32
else
pf:=PF_F64;
current_asmdata.CurrAsmList.concat(setoppostfix(taicpu.op_reg_reg(op,
left.location.register,right.location.register), pf));
cg.maybe_check_for_fpu_exception(current_asmdata.CurrAsmList);
cg.a_reg_alloc(current_asmdata.CurrAsmList,NR_DEFAULTFLAGS);
current_asmdata.CurrAsmList.concat(taicpu.op_reg_reg(A_VMRS,NR_APSR_nzcv,NR_FPSCR));
location.resflags:=GetFpuResFlags;
end
else if FPUARM_HAS_VFP_EXTENSION in fpu_capabilities[current_settings.fputype] then
begin
hlcg.location_force_mmregscalar(current_asmdata.CurrAsmList,left.location,left.resultdef,true);
hlcg.location_force_mmregscalar(current_asmdata.CurrAsmList,right.location,right.resultdef,true);
if nodetype in [equaln,unequaln] then
op:=A_VCMP
else
op:=A_VCMPE;
current_asmdata.CurrAsmList.concat(setoppostfix(taicpu.op_reg_reg(op,
left.location.register,right.location.register),PF_F32));
cg.maybe_check_for_fpu_exception(current_asmdata.CurrAsmList);
cg.a_reg_alloc(current_asmdata.CurrAsmList,NR_DEFAULTFLAGS);
current_asmdata.CurrAsmList.Concat(taicpu.op_reg_reg(A_VMRS, NR_APSR_nzcv, NR_FPSCR));
end
else
{ this case should be handled already by pass1 }
internalerror(2009112404);
end;
end;
procedure tarmaddnode.second_cmpsmallset;
var
tmpreg : tregister;
b: byte;
begin
pass_left_right;
location_reset(location,LOC_FLAGS,OS_NO);
if (not(nf_swapped in flags) and
(nodetype = lten)) or
((nf_swapped in flags) and
(nodetype = gten)) then
swapleftright;
(* Try to keep right as a constant *)
if (right.location.loc <> LOC_CONSTANT) or
not(is_shifter_const(right.location.value, b)) or
((GenerateThumbCode) and not(is_thumb_imm(right.location.value))) then
hlcg.location_force_reg(current_asmdata.CurrAsmList,right.location,right.resultdef,right.resultdef,true);
hlcg.location_force_reg(current_asmdata.CurrAsmList,left.location,left.resultdef,left.resultdef,true);
case nodetype of
equaln,
unequaln:
begin
cg.a_reg_alloc(current_asmdata.CurrAsmList,NR_DEFAULTFLAGS);
if right.location.loc = LOC_CONSTANT then
current_asmdata.CurrAsmList.concat(taicpu.op_reg_const(A_CMP,left.location.register,right.location.value))
else
current_asmdata.CurrAsmList.concat(taicpu.op_reg_reg(A_CMP,left.location.register,right.location.register));
if nodetype = equaln then
location.resflags:=F_EQ
else
location.resflags:=F_NE;
end;
lten,
gten:
begin
tmpreg:=cg.getintregister(current_asmdata.CurrAsmList,location.size);
if right.location.loc = LOC_CONSTANT then
begin
cg.a_op_const_reg_reg(current_asmdata.CurrAsmList,OP_AND,OS_32,right.location.value,left.location.register,tmpreg);
cg.a_reg_alloc(current_asmdata.CurrAsmList,NR_DEFAULTFLAGS);
current_asmdata.CurrAsmList.concat(taicpu.op_reg_const(A_CMP,tmpreg,right.location.value));
end
else
begin
cg.a_op_reg_reg_reg(current_asmdata.CurrAsmList,OP_AND,OS_32,left.location.register,right.location.register,tmpreg);
cg.a_reg_alloc(current_asmdata.CurrAsmList,NR_DEFAULTFLAGS);
current_asmdata.CurrAsmList.concat(taicpu.op_reg_reg(A_CMP,tmpreg,right.location.register));
end;
location.resflags:=F_EQ;
end;
else
internalerror(2004012401);
end;
end;
procedure tarmaddnode.second_cmp64bit;
var
unsigned : boolean;
oldnodetype : tnodetype;
dummyreg : tregister;
truelabel, falselabel: tasmlabel;
l: tasmlabel;
const
lt_zero_swapped: array[boolean] of tnodetype = (ltn, gtn);
begin
truelabel:=nil;
falselabel:=nil;
unsigned:=not(is_signed(left.resultdef)) or
not(is_signed(right.resultdef));
pass_left_right;
{ pass_left_right moves possible consts to the right, the only
remaining case with left consts (currency) can take this path too (KB) }
if (right.nodetype=ordconstn) and
(tordconstnode(right).value=0) and
((nodetype in [equaln,unequaln]) or
(not(GenerateThumbCode) and is_signed(left.resultdef) and (nodetype = lt_zero_swapped[nf_swapped in Flags]))
) then
begin
location_reset(location,LOC_FLAGS,OS_NO);
if not(left.location.loc in [LOC_CREGISTER,LOC_REGISTER]) then
hlcg.location_force_reg(current_asmdata.CurrAsmList,left.location,left.resultdef,left.resultdef,true);
cg.a_reg_alloc(current_asmdata.CurrAsmList,NR_DEFAULTFLAGS);
{ Optimize for the common case of int64 < 0 }
if nodetype in [ltn, gtn] then
begin
{Just check for the MSB in reghi to be set or not, this is independed from nf_swapped}
location.resflags:=F_NE;
current_asmdata.CurrAsmList.concat(taicpu.op_reg_const(A_TST,left.location.register64.reghi, aint($80000000)));
end
else
begin
location.resflags:=getresflags(unsigned);
dummyreg:=cg.getintregister(current_asmdata.CurrAsmList,location.size);
if GenerateThumbCode then
cg.a_op_reg_reg_reg(current_asmdata.CurrAsmList,OP_OR,OS_32,left.location.register64.reglo,left.location.register64.reghi,dummyreg)
else
current_asmdata.CurrAsmList.concat(setoppostfix(taicpu.op_reg_reg_reg(A_ORR,dummyreg,left.location.register64.reglo,left.location.register64.reghi),PF_S));
end;
end
else
begin
hlcg.location_force_reg(current_asmdata.CurrAsmList,left.location,left.resultdef,left.resultdef,true);
hlcg.location_force_reg(current_asmdata.CurrAsmList,right.location,right.resultdef,right.resultdef,true);
{ operation requiring proper N, Z and C flags ? }
if unsigned or (nodetype in [equaln,unequaln]) then
begin
location_reset(location,LOC_FLAGS,OS_NO);
location.resflags:=getresflags(unsigned);
cg.a_reg_alloc(current_asmdata.CurrAsmList,NR_DEFAULTFLAGS);
current_asmdata.CurrAsmList.concat(taicpu.op_reg_reg(A_CMP,left.location.register64.reghi,right.location.register64.reghi));
if GenerateThumbCode or GenerateThumb2Code then
begin
current_asmdata.getjumplabel(l);
cg.a_jmp_flags(current_asmdata.CurrAsmList,F_NE,l);
current_asmdata.CurrAsmList.concat(taicpu.op_reg_reg(A_CMP,left.location.register64.reglo,right.location.register64.reglo));
cg.a_label(current_asmdata.CurrAsmList,l);
end
else
current_asmdata.CurrAsmList.concat(setcondition(taicpu.op_reg_reg(A_CMP,left.location.register64.reglo,right.location.register64.reglo),C_EQ));
end
else
{ operation requiring proper N, Z and V flags ? }
begin
current_asmdata.getjumplabel(truelabel);
current_asmdata.getjumplabel(falselabel);
location_reset_jump(location,truelabel,falselabel);
cg.a_reg_alloc(current_asmdata.CurrAsmList,NR_DEFAULTFLAGS);
current_asmdata.CurrAsmList.concat(taicpu.op_reg_reg(A_CMP,left.location.register64.reghi,right.location.register64.reghi));
{ the jump the sequence is a little bit hairy }
case nodetype of
ltn,gtn:
begin
cg.a_jmp_flags(current_asmdata.CurrAsmList,getresflags(false),location.truelabel);
{ cheat a little bit for the negative test }
toggleflag(nf_swapped);
cg.a_jmp_flags(current_asmdata.CurrAsmList,getresflags(false),location.falselabel);
cg.a_reg_dealloc(current_asmdata.CurrAsmList,NR_DEFAULTFLAGS);
toggleflag(nf_swapped);
end;
lten,gten:
begin
oldnodetype:=nodetype;
if nodetype=lten then
nodetype:=ltn
else
nodetype:=gtn;
cg.a_jmp_flags(current_asmdata.CurrAsmList,getresflags(unsigned),location.truelabel);
{ cheat for the negative test }
if nodetype=ltn then
nodetype:=gtn
else
nodetype:=ltn;
cg.a_jmp_flags(current_asmdata.CurrAsmList,getresflags(unsigned),location.falselabel);
cg.a_reg_dealloc(current_asmdata.CurrAsmList,NR_DEFAULTFLAGS);
nodetype:=oldnodetype;
end;
else
;
end;
cg.a_reg_alloc(current_asmdata.CurrAsmList,NR_DEFAULTFLAGS);
current_asmdata.CurrAsmList.concat(taicpu.op_reg_reg(A_CMP,left.location.register64.reglo,right.location.register64.reglo));
{ the comparisaion of the low dword have to be
always unsigned! }
cg.a_jmp_flags(current_asmdata.CurrAsmList,getresflags(true),location.truelabel);
cg.a_jmp_always(current_asmdata.CurrAsmList,location.falselabel);
cg.a_reg_dealloc(current_asmdata.CurrAsmList,NR_DEFAULTFLAGS);
end;
end;
end;
procedure tarmaddnode.second_add64bit;
var
asmList : TAsmList;
ll,rl,res : TRegister64;
tmpreg: TRegister;
begin
if (nodetype in [muln]) then
begin
asmList := current_asmdata.CurrAsmList;
pass_left_right;
force_reg_left_right(true, (left.location.loc<>LOC_CONSTANT) and (right.location.loc<>LOC_CONSTANT));
set_result_location_reg;
{ shortcuts to register64s }
ll:=left.location.register64;
rl:=right.location.register64;
res:=location.register64;
tmpreg := cg.getintregister(current_asmdata.CurrAsmList,OS_32);
asmList.concat(taicpu.op_reg_reg_reg(A_MUL,tmpreg,ll.reglo,rl.reghi));
asmList.concat(taicpu.op_reg_reg_reg_reg(A_UMULL,res.reglo,res.reghi,rl.reglo,ll.reglo));
tbasecgarm(cg).safe_mla(asmList,tmpreg,rl.reglo,ll.reghi,tmpreg);
asmList.concat(taicpu.op_reg_reg_reg(A_ADD,res.reghi,tmpreg,res.reghi));
end
else
inherited second_add64bit;
end;
function tarmaddnode.pass_1 : tnode;
var
unsigned : boolean;
begin
result:=inherited pass_1;
if not(assigned(result)) then
begin
unsigned:=not(is_signed(left.resultdef)) or
not(is_signed(right.resultdef));
if is_64bit(left.resultdef) and
((nodetype in [equaln,unequaln]) or
(unsigned and (nodetype in [ltn,lten,gtn,gten]))
) then
expectloc:=LOC_FLAGS;
if (left.resultdef.typ=floatdef) and
([FPUARM_HAS_VFP_EXTENSION,FPUARM_HAS_VFP_DOUBLE]*fpu_capabilities[current_settings.fputype]<>[]) and
needs_check_for_fpu_exceptions then
Include(current_procinfo.flags,pi_do_call);
end;
end;
function tarmaddnode.first_addfloat: tnode;
begin
result := nil;
if (FPUARM_HAS_VFP_EXTENSION in fpu_capabilities[current_settings.fputype]) and
not(FPUARM_HAS_VFP_DOUBLE in fpu_capabilities[current_settings.fputype]) then
begin
case tfloatdef(left.resultdef).floattype of
s32real:
;
s64real:
result:=first_addfloat_soft;
else
internalerror(2019050933);
end;
end
else
result:=inherited first_addfloat;
end;
procedure tarmaddnode.second_cmpordinal;
var
unsigned : boolean;
tmpreg : tregister;
b : byte;
begin
pass_left_right;
force_reg_left_right(true,true);
unsigned:=not(is_signed(left.resultdef)) or
not(is_signed(right.resultdef));
cg.a_reg_alloc(current_asmdata.CurrAsmList,NR_DEFAULTFLAGS);
if right.location.loc = LOC_CONSTANT then
begin
if (not(GenerateThumbCode) and is_shifter_const(right.location.value,b)) or
((GenerateThumbCode) and is_thumb_imm(right.location.value)) then
current_asmdata.CurrAsmList.concat(taicpu.op_reg_const(A_CMP,left.location.register,right.location.value))
else
begin
tmpreg:=cg.getintregister(current_asmdata.CurrAsmList,location.size);
cg.a_load_const_reg(current_asmdata.CurrAsmList,OS_INT,
right.location.value,tmpreg);
current_asmdata.CurrAsmList.concat(taicpu.op_reg_reg(A_CMP,left.location.register,tmpreg));
end;
end
else
current_asmdata.CurrAsmList.concat(taicpu.op_reg_reg(A_CMP,left.location.register,right.location.register));
location_reset(location,LOC_FLAGS,OS_NO);
location.resflags:=getresflags(unsigned);
end;
const
multops: array[boolean] of TAsmOp = (A_SMULL, A_UMULL);
procedure tarmaddnode.second_addordinal;
var
unsigned: boolean;
begin
if (nodetype=muln) and
is_64bit(resultdef) and
not(GenerateThumbCode) and
(CPUARM_HAS_UMULL in cpu_capabilities[current_settings.cputype]) then
begin
pass_left_right;
force_reg_left_right(true, false);
set_result_location_reg;
unsigned:=not(is_signed(left.resultdef)) or
not(is_signed(right.resultdef));
current_asmdata.CurrAsmList.Concat(
taicpu.op_reg_reg_reg_reg(multops[unsigned], location.register64.reglo, location.register64.reghi,
left.location.register,right.location.register));
end
else
inherited second_addordinal;
end;
function tarmaddnode.use_generic_mul32to64: boolean;
begin
result:=GenerateThumbCode or not(CPUARM_HAS_UMULL in cpu_capabilities[current_settings.cputype]);
end;
function tarmaddnode.use_generic_mul64bit: boolean;
begin
result:=GenerateThumbCode or
not(CPUARM_HAS_UMULL in cpu_capabilities[current_settings.cputype]) or
needoverflowcheck;
end;
begin
caddnode:=tarmaddnode;
end.
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