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* patch from mazen to fix zero extending of register moves where the destination

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size is larger than the source size

git-svn-id: trunk@7090 -
This commit is contained in:
peter 2007-04-12 07:11:24 +00:00
parent 1a2ff69193
commit 1f7cde0306
1 changed files with 21 additions and 6 deletions
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27
compiler/sparc/cgcpu.pas
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@ -578,12 +578,27 @@ implementation
begin
if reg1<>reg2 then
begin
{ same size, only a register mov required }
instr:=taicpu.op_reg_reg(A_MOV,reg1,reg2);
list.Concat(instr);
{ Notify the register allocator that we have written a move instruction so
it can try to eliminate it. }
add_move_instruction(instr);
if tcgsize2size[tosize] > tcgsize2size[fromsize] then
begin
list.concat(taicpu.op_reg_const_reg(A_SLL,reg1,24,reg2));
case fromsize of
OS_8,
OS_16 :
list.concat(taicpu.op_reg_const_reg(A_SRL,reg2,24,reg2));
OS_S8,
OS_S16 :
list.concat(taicpu.op_reg_const_reg(A_SRA,reg2,24,reg2));
end;
end
else
begin
{ same size, only a register mov required }
instr:=taicpu.op_reg_reg(A_MOV,reg1,reg2);
list.Concat(instr);
{ Notify the register allocator that we have written a move instruction so
it can try to eliminate it. }
add_move_instruction(instr);
end;
end;
end;
end;