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* Aarch64: fix 32 bit div operations with constant denominators, resolves #38225

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git-svn-id: trunk@47812 -
This commit is contained in:
florian 2020-12-18 21:39:35 +00:00
parent 2a897f5b6b
commit 072be7b0f7
3 changed files with 48 additions and 8 deletions
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1
.gitattributes vendored
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@ -18612,6 +18612,7 @@ tests/webtbs/tw38151.pp svneol=native#text/pascal
tests/webtbs/tw38164.pp svneol=native#text/pascal
tests/webtbs/tw38201.pp svneol=native#text/pascal
tests/webtbs/tw38202.pp svneol=native#text/pascal
tests/webtbs/tw38225.pp svneol=native#text/pascal
tests/webtbs/tw3827.pp svneol=native#text/plain
tests/webtbs/tw3829.pp svneol=native#text/plain
tests/webtbs/tw3833.pp svneol=native#text/plain

18
compiler/aarch64/ncpumat.pas
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@ -82,11 +82,13 @@ implementation
var
helper1, helper2: TRegister;
so: tshifterop;
opsize: TCgSize;
begin
opsize:=def_cgsize(resultdef);
if tordconstnode(right).value=0 then
internalerror(2020021601)
else if tordconstnode(right).value=1 then
cg.a_load_reg_reg(current_asmdata.CurrAsmList, OS_INT, OS_INT, numerator, resultreg)
cg.a_load_reg_reg(current_asmdata.CurrAsmList, opsize, opsize, numerator, resultreg)
else if (tordconstnode(right).value = int64(-1)) then
begin
// note: only in the signed case possible..., may overflow
@ -100,26 +102,26 @@ implementation
begin
if (is_signed(right.resultdef)) then
begin
helper2:=cg.getintregister(current_asmdata.CurrAsmList,OS_INT);
helper2:=cg.getintregister(current_asmdata.CurrAsmList,opsize);
if power = 1 then
helper1:=numerator
else
begin
helper1:=cg.getintregister(current_asmdata.CurrAsmList,OS_INT);
cg.a_op_const_reg_reg(current_asmdata.CurrAsmList,OP_SAR,OS_INT,63,numerator,helper1);
helper1:=cg.getintregister(current_asmdata.CurrAsmList,opsize);
cg.a_op_const_reg_reg(current_asmdata.CurrAsmList,OP_SAR,opsize,resultdef.size*8-1,numerator,helper1);
end;
shifterop_reset(so);
so.shiftmode:=SM_LSR;
so.shiftimm:=64-power;
so.shiftimm:=resultdef.size*8-power;
current_asmdata.CurrAsmList.concat(taicpu.op_reg_reg_reg_shifterop(A_ADD,helper2,numerator,helper1,so));
cg.a_op_const_reg_reg(current_asmdata.CurrAsmList,OP_SAR,OS_INT,power,helper2,resultreg);
cg.a_op_const_reg_reg(current_asmdata.CurrAsmList,OP_SAR,def_cgsize(resultdef),power,helper2,resultreg);
end
else
cg.a_op_const_reg_reg(current_asmdata.CurrAsmList,OP_SHR,OS_INT,power,numerator,resultreg)
cg.a_op_const_reg_reg(current_asmdata.CurrAsmList,OP_SHR,opsize,power,numerator,resultreg)
end
else
{ Everything else is handled in the generic code }
cg.g_div_const_reg_reg(current_asmdata.CurrAsmList,def_cgsize(resultdef),
cg.g_div_const_reg_reg(current_asmdata.CurrAsmList,opsize,
tordconstnode(right).value.svalue,numerator,resultreg);
end;

37
tests/webtbs/tw38225.pp Normal file
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@ -0,0 +1,37 @@
{$inline on}
{$mode objfpc}
uses
classes;
operator - (const A: TPoint): TPoint; inline;
begin
Result.X := - A.X;
Result.Y := - A.Y;
end;
operator div(const A: TPoint; ADivisor: Integer): TPoint; inline;
begin
Result.X := A.X div ADivisor;
Result.Y := A.Y div ADivisor;
end;
procedure p;
var
i1,i2 : longint;
q1,q2 : int64;
d2 : dword;
p1,p2 : TPoint;
begin
p2:=-p2 div 2;
try
p2:=-p2 div 2;
except
p2:=-p2 div 2;
end;
end;
begin
end.