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* some misc constant fixes

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This commit is contained in:
Jonas Maebe 2002-08-02 11:10:42 +00:00
parent f8b6c707a2
commit 54011b5bea
1 changed files with 29 additions and 19 deletions
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48
compiler/powerpc/cgcpu.pas
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@ -131,12 +131,6 @@ unit cgcpu;
const
{
TOpCG2AsmOp: Array[topcg] of TAsmOp = (A_NONE,A_ADD,A_AND,A_DIVWU,
A_DIVW,A_MULLW, A_MULLW, A_NEG,A_NOT,A_OR,
A_SRAW,A_SLW,A_SRW,A_SUB,A_XOR);
}
TOpCG2AsmOpConstLo: Array[topcg] of TAsmOp = (A_NONE,A_ADDI,A_ANDI_,A_DIVWU,
A_DIVW,A_MULLW, A_MULLW, A_NONE,A_NONE,A_ORI,
A_SRAWI,A_SLWI,A_SRWI,A_SUBI,A_XORI);
@ -267,13 +261,13 @@ const
begin
if (longint(a) >= low(smallint)) and
(longint(a) <= high(smallint)) then
list.concat(taicpu.op_reg_const(A_LI,reg,longint(a)))
list.concat(taicpu.op_reg_const(A_LI,reg,smallint(a)))
else if ((a and $ffff) <> 0) then
begin
list.concat(taicpu.op_reg_const(A_LI,reg,smallint(a and $ffff)));
if ((a shr 16) <> 0) then
list.concat(taicpu.op_reg_const(A_ADDIS,reg,
(a shr 16)+ord(smallint(a and $ffff) < 0)))
smallint((a shr 16)+ord(smallint(a and $ffff) < 0))))
end
else
list.concat(taicpu.op_reg_const(A_LIS,reg,smallint(a shr 16)));
@ -452,20 +446,33 @@ const
result := false;
if (smallint(a) > 0) then
begin
list.concat(taicpu.op_reg_reg_const(oplo,dst,src,word(a)));
list.concat(taicpu.op_reg_reg_const(ophi,dst,dst,a shr 16));
list.concat(taicpu.op_reg_reg_const(oplo,dst,src,smallint(a)));
list.concat(taicpu.op_reg_reg_const(ophi,dst,dst,smallint(a shr 16)));
result := true;
end;
end;
begin
if op = OP_SUB then
begin
{$ifopt q+}
{$q-}
{$define overflowon}
{$endif}
a_op_const_reg_reg(list,op,size,aword(-a),src,dst);
{$ifdef overflowon}
{$q+}
{$undef overflowon}
{$endif}
exit;
end;
ophi := TOpCG2AsmOpConstHi[op];
oplo := TOpCG2AsmOpConstLo[op];
gotrlwi := get_rlwi_const(a,l1,l2);
{ constants in a PPC instruction are always interpreted as signed }
{ 16bit values, so if the value is between low(smallint) and }
{ high(smallint), it's easy }
if (op in [OP_ADD,OP_SUB,OP_AND,OP_OR,OP_XOR]) then
if (op in [OP_ADD,OP_AND,OP_OR,OP_XOR]) then
begin
if (a = 0) then
begin
@ -482,10 +489,10 @@ const
end
else if (longint(a) >= low(smallint)) and
(longint(a) <= high(smallint)) and
(not(op = OP_AND) or
not gotrlwi) then
((op <> OP_AND) or
not gotrlwi) then
begin
list.concat(taicpu.op_reg_reg_const(oplo,dst,src,a));
list.concat(taicpu.op_reg_reg_const(oplo,dst,src,smallint(a)));
exit;
end;
{ all basic constant instructions also have a shifted form that }
@ -495,7 +502,7 @@ const
(not(op = OP_AND) or
not gotrlwi) then
begin
list.concat(taicpu.op_reg_reg_const(ophi,dst,src,hi(a)));
list.concat(taicpu.op_reg_reg_const(ophi,dst,src,smallint(a shr 16)));
exit;
end;
end;
@ -508,14 +515,14 @@ const
OP_IMUL, OP_MUL:
if (longint(a) >= low(smallint)) and
(longint(a) <= high(smallint)) then
list.concat(taicpu.op_reg_reg_const(A_MULLI,dst,src,a))
list.concat(taicpu.op_reg_reg_const(A_MULLI,dst,src,smallint(a)))
else
usereg := true;
OP_ADD,OP_SUB:
OP_ADD:
begin
list.concat(taicpu.op_reg_reg_const(oplo,dst,src,smallint(a)));
list.concat(taicpu.op_reg_reg_const(ophi,dst,dst,
(a shr 16) + ord(smallint(a) < 0)));
smallint((a shr 16) + ord(smallint(a) < 0))));
end;
OP_OR:
{ try to use rlwimi }
@ -1453,7 +1460,10 @@ begin
end.
{
$Log$
Revision 1.31 2002-07-30 20:50:44 florian
Revision 1.32 2002-08-02 11:10:42 jonas
* some misc constant fixes
Revision 1.31 2002/07/30 20:50:44 florian
* the code generator knows now if parameters are in registers
Revision 1.30 2002/07/29 21:23:44 florian