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Make this code a little less magic number laden.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131456 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eric Christopher 2011-05-17 07:47:55 +00:00
parent 5d4718b1c7
commit 8102bf003e
1 changed files with 30 additions and 12 deletions
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42
lib/Target/X86/X86ISelDAGToDAG.cpp
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@ -1482,6 +1482,24 @@ SDNode *X86DAGToDAGISel::SelectAtomicLoadAdd(SDNode *Node, EVT NVT) {
}
}
enum AtomicOpc {
OR
};
enum AtomicSz {
ConstantI8,
I8,
SextConstantI16,
ConstantI16,
I16,
SextConstantI32,
ConstantI32,
I32,
SextConstantI64,
ConstantI64,
I64
};
static const unsigned int AtomicOpcTbl[1][11] = {
{
X86::LOCK_OR8mi,
@ -1521,42 +1539,42 @@ SDNode *X86DAGToDAGISel::SelectAtomicLoadOr(SDNode *Node, EVT NVT) {
}
// Which index into the table.
unsigned index = 0;
enum AtomicOpc Op = OR;
unsigned Opc = 0;
switch (NVT.getSimpleVT().SimpleTy) {
default: return 0;
case MVT::i8:
if (isCN)
Opc = AtomicOpcTbl[index][0];
Opc = AtomicOpcTbl[Op][ConstantI8];
else
Opc = AtomicOpcTbl[index][1];
Opc = AtomicOpcTbl[Op][I8];
break;
case MVT::i16:
if (isCN) {
if (immSext8(Val.getNode()))
Opc = AtomicOpcTbl[index][2];
Opc = AtomicOpcTbl[Op][SextConstantI16];
else
Opc = AtomicOpcTbl[index][3];
Opc = AtomicOpcTbl[Op][ConstantI16];
} else
Opc = AtomicOpcTbl[index][4];
Opc = AtomicOpcTbl[Op][I16];
break;
case MVT::i32:
if (isCN) {
if (immSext8(Val.getNode()))
Opc = AtomicOpcTbl[index][5];
Opc = AtomicOpcTbl[Op][SextConstantI32];
else
Opc = AtomicOpcTbl[index][6];
Opc = AtomicOpcTbl[Op][ConstantI32];
} else
Opc = AtomicOpcTbl[index][7];
Opc = AtomicOpcTbl[Op][I32];
break;
case MVT::i64:
if (isCN) {
if (immSext8(Val.getNode()))
Opc = AtomicOpcTbl[index][8];
Opc = AtomicOpcTbl[Op][SextConstantI64];
else if (i64immSExt32(Val.getNode()))
Opc = AtomicOpcTbl[index][9];
Opc = AtomicOpcTbl[Op][ConstantI64];
} else
Opc = AtomicOpcTbl[index][10];
Opc = AtomicOpcTbl[Op][I64];
break;
}