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* load 0 into unaligned memory in a simpler way

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git-svn-id: trunk@44717 -
This commit is contained in:
florian 2020-04-13 17:29:09 +00:00
parent 7c2c8581b7
commit 2bae2a451c
1 changed files with 21 additions and 4 deletions
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25
compiler/aarch64/cgcpu.pas
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@ -681,15 +681,32 @@ implementation
procedure tcgaarch64.a_load_const_ref(list: TAsmList; size: tcgsize; a: tcgint; const ref: treference);
var
reg: tregister;
href: treference;
i: Integer;
begin
{ use the zero register if possible }
if a=0 then
begin
if size in [OS_64,OS_S64] then
reg:=NR_XZR
href:=ref;
inc(href.offset,tcgsize2size[size]-1);
if (tcgsize2size[size]>1) and (ref.alignment=1) and (simple_ref_type(A_STP,OS_8,PF_None,ref)=sr_simple) and
(simple_ref_type(A_STP,OS_8,PF_None,href)=sr_simple) then
begin
href:=ref;
for i:=0 to tcgsize2size[size]-1 do
begin
a_load_const_ref(list,OS_8,0,href);
inc(href.offset);
end;
end
else
reg:=NR_WZR;
a_load_reg_ref(list,size,size,reg,ref);
begin
if size in [OS_64,OS_S64] then
reg:=NR_XZR
else
reg:=NR_WZR;
a_load_reg_ref(list,size,size,reg,ref);
end;
end
else
inherited;