Implement AArch64 vector load/store multiple N-element structure class SIMD(lselem).

Including following 14 instructions:
4 ld1 insts: load multiple 1-element structure to sequential 1/2/3/4 registers.
ld2/ld3/ld4: load multiple N-element structure to sequential N registers (N=2,3,4).
4 st1 insts: store multiple 1-element structure from sequential 1/2/3/4 registers.
st2/st3/st4: store multiple N-element structure from sequential N registers (N = 2,3,4).

llvm-svn: 192361

1 files changed, 30 insertions, 0 deletions

diff --git a/llvm/lib/Target/AArch64/InstPrinter/AArch64InstPrinter.cpp b/llvm/lib/Target/AArch64/InstPrinter/AArch64InstPrinter.cpp
index 26bd797e3b3..51335e145b7 100644
--- a/llvm/lib/Target/AArch64/InstPrinter/AArch64InstPrinter.cpp
+++ b/llvm/lib/Target/AArch64/InstPrinter/AArch64InstPrinter.cpp
@@ -507,3 +507,33 @@ void AArch64InstPrinter::printNeonUImm64MaskOperand(const MCInst *MI,
   O << "#0x";
   O.write_hex(Mask);
 }
+
+// If Count > 1, there are two valid kinds of vector list:
+//   (1) {Vn.layout, Vn+1.layout, ... , Vm.layout}
+//   (2) {Vn.layout - Vm.layout}
+// We choose the first kind as output.
+template <A64Layout::VectorLayout Layout, unsigned Count>
+void AArch64InstPrinter::printVectorList(const MCInst *MI, unsigned OpNum,
+                                         raw_ostream &O) {
+  assert(Count >= 1 && Count <= 4 && "Invalid Number of Vectors");
+
+  unsigned Reg = MI->getOperand(OpNum).getReg();
+  std::string LayoutStr = A64VectorLayoutToString(Layout);
+  O << "{";
+  if (Count > 1) { // Print sub registers separately
+    bool IsVec64 = (Layout < A64Layout::_16B) ? true : false;
+    unsigned SubRegIdx = IsVec64 ? AArch64::dsub_0 : AArch64::qsub_0;
+    for (unsigned I = 0; I < Count; I++) {
+      std::string Name = getRegisterName(MRI.getSubReg(Reg, SubRegIdx++));
+      Name[0] = 'v';
+      O << Name << LayoutStr;
+      if (I != Count - 1)
+        O << ", ";
+    }
+  } else { // Print the register directly when NumVecs is 1.
+    std::string Name = getRegisterName(Reg);
+    Name[0] = 'v';
+    O << Name << LayoutStr;
+  }
+  O << "}";
+}