[Mips] Support for unaligned load/store microMips instructions
This includes instructions lwl, lwr, swl and swr.
Patch by Zoran Jovnovic
llvm-svn: 188312
diff --git a/llvm/lib/Target/Mips/MicroMipsInstrInfo.td b/llvm/lib/Target/Mips/MicroMipsInstrInfo.td
index 249d712..549d0e2 100644
--- a/llvm/lib/Target/Mips/MicroMipsInstrInfo.td
+++ b/llvm/lib/Target/Mips/MicroMipsInstrInfo.td
@@ -1,4 +1,34 @@
-let isCodeGenOnly = 1 in {
+def addrimm12 : ComplexPattern<iPTR, 2, "selectIntAddrMM", [frameindex]>;
+
+def simm12 : Operand<i32> {
+ let DecoderMethod = "DecodeSimm12";
+}
+
+def mem_mm_12 : Operand<i32> {
+ let PrintMethod = "printMemOperand";
+ let MIOperandInfo = (ops GPR32, simm12);
+ let EncoderMethod = "getMemEncodingMMImm12";
+ let ParserMatchClass = MipsMemAsmOperand;
+ let OperandType = "OPERAND_MEMORY";
+}
+
+let canFoldAsLoad = 1 in
+class LoadLeftRightMM<string opstr, SDNode OpNode, RegisterOperand RO,
+ Operand MemOpnd> :
+ InstSE<(outs RO:$rt), (ins MemOpnd:$addr, RO:$src),
+ !strconcat(opstr, "\t$rt, $addr"),
+ [(set RO:$rt, (OpNode addrimm12:$addr, RO:$src))],
+ NoItinerary, FrmI> {
+ string Constraints = "$src = $rt";
+}
+
+class StoreLeftRightMM<string opstr, SDNode OpNode, RegisterOperand RO,
+ Operand MemOpnd>:
+ InstSE<(outs), (ins RO:$rt, MemOpnd:$addr),
+ !strconcat(opstr, "\t$rt, $addr"),
+ [(OpNode RO:$rt, addrimm12:$addr)], NoItinerary, FrmI>;
+
+let DecoderNamespace = "MicroMips" in {
/// Arithmetic Instructions (ALU Immediate)
def ADDiu_MM : MMRel, ArithLogicI<"addiu", simm16, GPR32Opnd>,
ADDI_FM_MM<0xc>;
@@ -64,4 +94,16 @@
defm SB_MM : StoreM<"sb", GPR32Opnd, truncstorei8>, MMRel, LW_FM_MM<0x6>;
defm SH_MM : StoreM<"sh", GPR32Opnd, truncstorei16>, MMRel, LW_FM_MM<0xe>;
defm SW_MM : StoreM<"sw", GPR32Opnd>, MMRel, LW_FM_MM<0x3e>;
+
+ /// Load and Store Instructions - unaligned
+ let Predicates = [InMicroMips] in {
+ def LWL_MM : LoadLeftRightMM<"lwl", MipsLWL, GPR32Opnd, mem_mm_12>,
+ LWL_FM_MM<0x0>;
+ def LWR_MM : LoadLeftRightMM<"lwr", MipsLWR, GPR32Opnd, mem_mm_12>,
+ LWL_FM_MM<0x1>;
+ def SWL_MM : StoreLeftRightMM<"swl", MipsSWL, GPR32Opnd, mem_mm_12>,
+ LWL_FM_MM<0x8>;
+ def SWR_MM : StoreLeftRightMM<"swr", MipsSWR, GPR32Opnd, mem_mm_12>,
+ LWL_FM_MM<0x9>;
+ }
}