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* Aarch64: patch by J. Gareth Moreton: fix constant writing, resolves #38695

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+ test

git-svn-id: trunk@49104 -
This commit is contained in:
florian 2021-04-02 16:44:43 +00:00
parent e53d18d876
commit f0023a3b04
3 changed files with 22 additions and 10 deletions
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1
.gitattributes vendored
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@ -18769,6 +18769,7 @@ tests/webtbs/tw38636.pp svneol=native#text/plain
tests/webtbs/tw3864.pp svneol=native#text/plain
tests/webtbs/tw38642.pp svneol=native#text/pascal
tests/webtbs/tw3865.pp svneol=native#text/plain
tests/webtbs/tw38695.pp svneol=native#text/pascal
tests/webtbs/tw3870.pp svneol=native#text/plain
tests/webtbs/tw3893.pp svneol=native#text/plain
tests/webtbs/tw3898.pp svneol=native#text/plain

21
compiler/aarch64/cgcpu.pas
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@ -588,7 +588,7 @@ implementation
leftover_a: word;
begin
{$ifdef extdebug}
list.concat(tai_comment.Create(strpnew('Generating constant ' + tostr(a))));
list.concat(tai_comment.Create(strpnew('Generating constant ' + tostr(a) + ' / $' + hexstr(a, 16))));
{$endif extdebug}
case a of
{ Small positive number }
@ -623,7 +623,7 @@ implementation
Exit;
end;
{ This determines whether this write can be peformed with an ORR followed by MOVK
{ This determines whether this write can be performed with an ORR followed by MOVK
by copying the 2nd word to the 4th word for the ORR constant, then overwriting
the 4th word (unless the word is. The alternative would require 3 instructions }
leftover_a := word(a shr 48);
@ -644,14 +644,15 @@ implementation
called for a and it returned False. Reduces processing time. [Kit] }
if (manipulated_a <> a) and is_shifter_const(manipulated_a, size) then
begin
{ Encode value as:
orr reg,xzr,manipulated_a
movk reg,#(leftover_a),lsl #48
}
list.concat(taicpu.op_reg_reg_const(A_ORR, reg, makeregsize(NR_XZR, size), manipulated_a));
if (leftover_a <> 0) then
begin
shifterop_reset(so);
so.shiftmode := SM_LSL;
so.shiftimm := 48;
list.concat(taicpu.op_reg_const_shifterop(A_MOVK, reg, leftover_a, so));
end;
shifterop_reset(so);
so.shiftmode := SM_LSL;
so.shiftimm := 48;
list.concat(taicpu.op_reg_const_shifterop(A_MOVK, reg, leftover_a, so));
Exit;
end;
@ -664,7 +665,7 @@ implementation
stored as the first 16 bits followed by a shifter constant }
case a of
TCgInt($FFFF0000FFFF0000)..TCgInt($FFFF0000FFFFFFFF):
doinverted := False
doinverted := False;
else
begin
doinverted := True;

10
tests/webtbs/tw38695.pp Normal file
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@ -0,0 +1,10 @@
{ %opt=-O- }
var
q1,q2,q3 : qword;
begin
q1:=$0000FFFFFFFEFFFF;
q2:=$FFFEFFFF;
q3:=$FFFF00000000;
if q1<>q2 or q3 then
halt(1);
end.