1 files changed, 51 insertions, 0 deletions
diff --git a/contrib/llvm-project/llvm/lib/Target/LoongArch/MCTargetDesc/LoongArchMatInt.cpp b/contrib/llvm-project/llvm/lib/Target/LoongArch/MCTargetDesc/LoongArchMatInt.cpp
new file mode 100644
index 000000000000..1509c436c810
--- /dev/null
+++ b/contrib/llvm-project/llvm/lib/Target/LoongArch/MCTargetDesc/LoongArchMatInt.cpp
@@ -0,0 +1,51 @@
+//===- LoongArchMatInt.cpp - Immediate materialisation ---------*- C++ -*--===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "LoongArchMatInt.h"
+#include "MCTargetDesc/LoongArchMCTargetDesc.h"
+#include "llvm/Support/MathExtras.h"
+
+using namespace llvm;
+
+LoongArchMatInt::InstSeq LoongArchMatInt::generateInstSeq(int64_t Val) {
+  // Val:
+  // |            hi32              |              lo32            |
+  // +-----------+------------------+------------------+-----------+
+  // | Highest12 |    Higher20      |       Hi20       |    Lo12   |
+  // +-----------+------------------+------------------+-----------+
+  // 63        52 51              32 31              12 11         0
+  //
+  const int64_t Highest12 = Val >> 52 & 0xFFF;
+  const int64_t Higher20 = Val >> 32 & 0xFFFFF;
+  const int64_t Hi20 = Val >> 12 & 0xFFFFF;
+  const int64_t Lo12 = Val & 0xFFF;
+  InstSeq Insts;
+
+  if (Highest12 != 0 && SignExtend64<52>(Val) == 0) {
+    Insts.push_back(Inst(LoongArch::LU52I_D, SignExtend64<12>(Highest12)));
+    return Insts;
+  }
+
+  if (Hi20 == 0)
+    Insts.push_back(Inst(LoongArch::ORI, Lo12));
+  else if (SignExtend32<1>(Lo12 >> 11) == SignExtend32<20>(Hi20))
+    Insts.push_back(Inst(LoongArch::ADDI_W, SignExtend64<12>(Lo12)));
+  else {
+    Insts.push_back(Inst(LoongArch::LU12I_W, SignExtend64<20>(Hi20)));
+    if (Lo12 != 0)
+      Insts.push_back(Inst(LoongArch::ORI, Lo12));
+  }
+
+  if (SignExtend32<1>(Hi20 >> 19) != SignExtend32<20>(Higher20))
+    Insts.push_back(Inst(LoongArch::LU32I_D, SignExtend64<20>(Higher20)));
+
+  if (SignExtend32<1>(Higher20 >> 19) != SignExtend32<12>(Highest12))
+    Insts.push_back(Inst(LoongArch::LU52I_D, SignExtend64<12>(Highest12)));
+
+  return Insts;
+}