diff --git a/llvm/include/llvm/IR/IntrinsicsLoongArch.td b/llvm/include/llvm/IR/IntrinsicsLoongArch.td
--- a/llvm/include/llvm/IR/IntrinsicsLoongArch.td
+++ b/llvm/include/llvm/IR/IntrinsicsLoongArch.td
@@ -30,4 +30,7 @@
 }
 
 defm int_loongarch_masked_atomicrmw_xchg : MaskedAtomicRMWIntrinsics;
+defm int_loongarch_masked_atomicrmw_add : MaskedAtomicRMWIntrinsics;
+defm int_loongarch_masked_atomicrmw_sub : MaskedAtomicRMWIntrinsics;
+defm int_loongarch_masked_atomicrmw_nand : MaskedAtomicRMWIntrinsics;
 } // TargetPrefix = "loongarch"
diff --git a/llvm/lib/Target/LoongArch/LoongArchExpandAtomicPseudoInsts.cpp b/llvm/lib/Target/LoongArch/LoongArchExpandAtomicPseudoInsts.cpp
--- a/llvm/lib/Target/LoongArch/LoongArchExpandAtomicPseudoInsts.cpp
+++ b/llvm/lib/Target/LoongArch/LoongArchExpandAtomicPseudoInsts.cpp
@@ -87,6 +87,33 @@
   case LoongArch::PseudoAtomicSwap32:
     return expandAtomicBinOp(MBB, MBBI, AtomicRMWInst::Xchg, false, 32,
                              NextMBBI);
+  case LoongArch::PseudoMaskedAtomicLoadAdd32:
+    return expandAtomicBinOp(MBB, MBBI, AtomicRMWInst::Add, true, 32, NextMBBI);
+  case LoongArch::PseudoMaskedAtomicLoadSub32:
+    return expandAtomicBinOp(MBB, MBBI, AtomicRMWInst::Sub, true, 32, NextMBBI);
+  case LoongArch::PseudoAtomicLoadNand32:
+    return expandAtomicBinOp(MBB, MBBI, AtomicRMWInst::Nand, false, 32,
+                             NextMBBI);
+  case LoongArch::PseudoAtomicLoadNand64:
+    return expandAtomicBinOp(MBB, MBBI, AtomicRMWInst::Nand, false, 64,
+                             NextMBBI);
+  case LoongArch::PseudoMaskedAtomicLoadNand32:
+    return expandAtomicBinOp(MBB, MBBI, AtomicRMWInst::Nand, true, 32,
+                             NextMBBI);
+  case LoongArch::PseudoAtomicLoadAdd32:
+    return expandAtomicBinOp(MBB, MBBI, AtomicRMWInst::Add, false, 32,
+                             NextMBBI);
+  case LoongArch::PseudoAtomicLoadSub32:
+    return expandAtomicBinOp(MBB, MBBI, AtomicRMWInst::Sub, false, 32,
+                             NextMBBI);
+  case LoongArch::PseudoAtomicLoadAnd32:
+    return expandAtomicBinOp(MBB, MBBI, AtomicRMWInst::And, false, 32,
+                             NextMBBI);
+  case LoongArch::PseudoAtomicLoadOr32:
+    return expandAtomicBinOp(MBB, MBBI, AtomicRMWInst::Or, false, 32, NextMBBI);
+  case LoongArch::PseudoAtomicLoadXor32:
+    return expandAtomicBinOp(MBB, MBBI, AtomicRMWInst::Xor, false, 32,
+                             NextMBBI);
   }
   return false;
 }
@@ -104,12 +131,13 @@
 
   // .loop:
   //   dbar 0
-  //   ll.w dest, (addr)
+  //   ll.[w|d] dest, (addr)
   //   binop scratch, dest, val
-  //   sc.w scratch, scratch, (addr)
+  //   sc.[w|d] scratch, scratch, (addr)
   //   beq scratch, zero, loop
   BuildMI(LoopMBB, DL, TII->get(LoongArch::DBAR)).addImm(0);
-  BuildMI(LoopMBB, DL, TII->get(LoongArch::LL_W), DestReg)
+  BuildMI(LoopMBB, DL,
+          TII->get(Width == 32 ? LoongArch::LL_W : LoongArch::LL_D), DestReg)
       .addReg(AddrReg)
       .addImm(0);
   switch (BinOp) {
@@ -120,8 +148,42 @@
         .addReg(IncrReg)
         .addReg(LoongArch::R0);
     break;
+  case AtomicRMWInst::Nand:
+    BuildMI(LoopMBB, DL, TII->get(LoongArch::AND), ScratchReg)
+        .addReg(DestReg)
+        .addReg(IncrReg);
+    BuildMI(LoopMBB, DL, TII->get(LoongArch::XORI), ScratchReg)
+        .addReg(ScratchReg)
+        .addImm(-1);
+    break;
+  case AtomicRMWInst::Add:
+    BuildMI(LoopMBB, DL, TII->get(LoongArch::ADD_W), ScratchReg)
+        .addReg(DestReg)
+        .addReg(IncrReg);
+    break;
+  case AtomicRMWInst::Sub:
+    BuildMI(LoopMBB, DL, TII->get(LoongArch::SUB_W), ScratchReg)
+        .addReg(DestReg)
+        .addReg(IncrReg);
+    break;
+  case AtomicRMWInst::And:
+    BuildMI(LoopMBB, DL, TII->get(LoongArch::AND), ScratchReg)
+        .addReg(DestReg)
+        .addReg(IncrReg);
+    break;
+  case AtomicRMWInst::Or:
+    BuildMI(LoopMBB, DL, TII->get(LoongArch::OR), ScratchReg)
+        .addReg(DestReg)
+        .addReg(IncrReg);
+    break;
+  case AtomicRMWInst::Xor:
+    BuildMI(LoopMBB, DL, TII->get(LoongArch::XOR), ScratchReg)
+        .addReg(DestReg)
+        .addReg(IncrReg);
+    break;
   }
-  BuildMI(LoopMBB, DL, TII->get(LoongArch::SC_W), ScratchReg)
+  BuildMI(LoopMBB, DL,
+          TII->get(Width == 32 ? LoongArch::SC_W : LoongArch::SC_D), ScratchReg)
       .addReg(ScratchReg)
       .addReg(AddrReg)
       .addImm(0);
@@ -183,6 +245,23 @@
         .addReg(IncrReg)
         .addImm(0);
     break;
+  case AtomicRMWInst::Add:
+    BuildMI(LoopMBB, DL, TII->get(LoongArch::ADD_W), ScratchReg)
+        .addReg(DestReg)
+        .addReg(IncrReg);
+    break;
+  case AtomicRMWInst::Sub:
+    BuildMI(LoopMBB, DL, TII->get(LoongArch::SUB_W), ScratchReg)
+        .addReg(DestReg)
+        .addReg(IncrReg);
+    break;
+  case AtomicRMWInst::Nand:
+    BuildMI(LoopMBB, DL, TII->get(LoongArch::AND), ScratchReg)
+        .addReg(DestReg)
+        .addReg(IncrReg);
+    BuildMI(LoopMBB, DL, TII->get(LoongArch::XORI), ScratchReg)
+        .addReg(ScratchReg)
+        .addImm(-1);
     // TODO: support other AtomicRMWInst.
   }
 
diff --git a/llvm/lib/Target/LoongArch/LoongArchISelLowering.cpp b/llvm/lib/Target/LoongArch/LoongArchISelLowering.cpp
--- a/llvm/lib/Target/LoongArch/LoongArchISelLowering.cpp
+++ b/llvm/lib/Target/LoongArch/LoongArchISelLowering.cpp
@@ -1798,6 +1798,9 @@
   default:
     return false;
   case Intrinsic::loongarch_masked_atomicrmw_xchg_i32:
+  case Intrinsic::loongarch_masked_atomicrmw_add_i32:
+  case Intrinsic::loongarch_masked_atomicrmw_sub_i32:
+  case Intrinsic::loongarch_masked_atomicrmw_nand_i32:
     Info.opc = ISD::INTRINSIC_W_CHAIN;
     Info.memVT = MVT::i32;
     Info.ptrVal = I.getArgOperand(0);
@@ -1828,6 +1831,12 @@
       llvm_unreachable("Unexpected AtomicRMW BinOp");
     case AtomicRMWInst::Xchg:
       return Intrinsic::loongarch_masked_atomicrmw_xchg_i64;
+    case AtomicRMWInst::Add:
+      return Intrinsic::loongarch_masked_atomicrmw_add_i64;
+    case AtomicRMWInst::Sub:
+      return Intrinsic::loongarch_masked_atomicrmw_sub_i64;
+    case AtomicRMWInst::Nand:
+      return Intrinsic::loongarch_masked_atomicrmw_nand_i64;
       // TODO: support other AtomicRMWInst.
     }
   }
@@ -1838,6 +1847,12 @@
       llvm_unreachable("Unexpected AtomicRMW BinOp");
     case AtomicRMWInst::Xchg:
       return Intrinsic::loongarch_masked_atomicrmw_xchg_i32;
+    case AtomicRMWInst::Add:
+      return Intrinsic::loongarch_masked_atomicrmw_add_i32;
+    case AtomicRMWInst::Sub:
+      return Intrinsic::loongarch_masked_atomicrmw_sub_i32;
+    case AtomicRMWInst::Nand:
+      return Intrinsic::loongarch_masked_atomicrmw_nand_i32;
       // TODO: support other AtomicRMWInst.
     }
   }
diff --git a/llvm/lib/Target/LoongArch/LoongArchInstrInfo.td b/llvm/lib/Target/LoongArch/LoongArchInstrInfo.td
--- a/llvm/lib/Target/LoongArch/LoongArchInstrInfo.td
+++ b/llvm/lib/Target/LoongArch/LoongArchInstrInfo.td
@@ -1103,6 +1103,9 @@
 }
 
 def PseudoMaskedAtomicSwap32 : PseudoMaskedAM;
+def PseudoMaskedAtomicLoadAdd32 : PseudoMaskedAM;
+def PseudoMaskedAtomicLoadSub32 : PseudoMaskedAM;
+def PseudoMaskedAtomicLoadNand32 : PseudoMaskedAM;
 
 class PseudoAM : Pseudo<(outs GPR:$res, GPR:$scratch),
                         (ins GPR:$addr, GPR:$incr), []> {
@@ -1113,6 +1116,13 @@
 }
 
 def PseudoAtomicSwap32 : PseudoAM;
+def PseudoAtomicLoadNand32 : PseudoAM;
+def PseudoAtomicLoadNand64 : PseudoAM;
+def PseudoAtomicLoadAdd32 : PseudoAM;
+def PseudoAtomicLoadSub32 : PseudoAM;
+def PseudoAtomicLoadAnd32 : PseudoAM;
+def PseudoAtomicLoadOr32 : PseudoAM;
+def PseudoAtomicLoadXor32 : PseudoAM;
 
 class AtomicPat<Intrinsic intrin, Pseudo AMInst>
     : Pat<(intrin GPR:$addr, GPR:$incr, GPR:$mask, timm:$ordering),
@@ -1125,13 +1135,60 @@
           (AMSWAP_DB_W GPR:$incr, GPR:$addr)>;
 def : Pat<(atomic_swap_64 GPR:$addr, GPR:$incr),
           (AMSWAP_DB_D GPR:$incr, GPR:$addr)>;
+def : Pat<(atomic_load_add_64 GPR:$rj, GPR:$rk),
+          (AMADD_DB_D GPR:$rk, GPR:$rj)>;
+def : AtomicPat<int_loongarch_masked_atomicrmw_add_i64,
+                PseudoMaskedAtomicLoadAdd32>;
+def : Pat<(atomic_load_sub_32 GPR:$rj, GPR:$rk),
+          (AMADD_DB_W (SUB_W R0, GPR:$rk), GPR:$rj)>;
+def : Pat<(atomic_load_sub_64 GPR:$rj, GPR:$rk),
+          (AMADD_DB_D (SUB_D R0, GPR:$rk), GPR:$rj)>;
+def : AtomicPat<int_loongarch_masked_atomicrmw_sub_i64,
+                PseudoMaskedAtomicLoadSub32>;
+def : Pat<(atomic_load_nand_64 GPR:$rj, GPR:$rk),
+          (PseudoAtomicLoadNand64 GPR:$rk, GPR:$rj)>;
+def : AtomicPat<int_loongarch_masked_atomicrmw_nand_i64,
+                PseudoMaskedAtomicLoadNand32>;
+def : Pat<(atomic_load_add_32 GPR:$rj, GPR:$rk),
+          (AMADD_DB_W GPR:$rk, GPR:$rj)>;
+def : Pat<(atomic_load_and_32 GPR:$rj, GPR:$rk),
+          (AMAND_DB_W GPR:$rk, GPR:$rj)>;
+def : Pat<(atomic_load_and_64 GPR:$rj, GPR:$rk),
+          (AMAND_DB_D GPR:$rk, GPR:$rj)>;
+def : Pat<(atomic_load_or_32 GPR:$rj, GPR:$rk),
+          (AMOR_DB_W GPR:$rk, GPR:$rj)>;
+def : Pat<(atomic_load_or_64 GPR:$rj, GPR:$rk),
+          (AMOR_DB_D GPR:$rk, GPR:$rj)>;
+def : Pat<(atomic_load_xor_32 GPR:$rj, GPR:$rk),
+          (AMXOR_DB_W GPR:$rk, GPR:$rj)>;
+def : Pat<(atomic_load_xor_64 GPR:$rj, GPR:$rk),
+          (AMXOR_DB_D GPR:$rk, GPR:$rj)>;
 } // Predicates = [IsLA64]
 
+def : Pat<(atomic_load_nand_32 GPR:$rj, GPR:$rk),
+          (PseudoAtomicLoadNand32 GPR:$rk, GPR:$rj)>;
+
 let Predicates = [IsLA32] in {
 def : AtomicPat<int_loongarch_masked_atomicrmw_xchg_i32,
                 PseudoMaskedAtomicSwap32>;
 def : Pat<(atomic_swap_32 GPR:$addr, GPR:$incr),
           (PseudoAtomicSwap32 GPR:$incr, GPR:$addr)>;
+def : AtomicPat<int_loongarch_masked_atomicrmw_add_i32,
+                PseudoMaskedAtomicLoadAdd32>;
+def : AtomicPat<int_loongarch_masked_atomicrmw_sub_i32,
+                PseudoMaskedAtomicLoadSub32>;
+def : AtomicPat<int_loongarch_masked_atomicrmw_nand_i32,
+                PseudoMaskedAtomicLoadNand32>;
+def : Pat<(atomic_load_add_32 GPR:$addr, GPR:$incr),
+          (PseudoAtomicLoadAdd32 GPR:$incr, GPR:$addr)>;
+def : Pat<(atomic_load_sub_32 GPR:$addr, GPR:$incr),
+          (PseudoAtomicLoadSub32 GPR:$incr, GPR:$addr)>;
+def : Pat<(atomic_load_and_32 GPR:$addr, GPR:$incr),
+          (PseudoAtomicLoadAnd32 GPR:$incr, GPR:$addr)>;
+def : Pat<(atomic_load_or_32 GPR:$addr, GPR:$incr),
+          (PseudoAtomicLoadOr32 GPR:$incr, GPR:$addr)>;
+def : Pat<(atomic_load_xor_32 GPR:$addr, GPR:$incr),
+          (PseudoAtomicLoadXor32 GPR:$incr, GPR:$addr)>;
 } // Predicates = [IsLA32]
 
 /// Other pseudo-instructions
diff --git a/llvm/test/CodeGen/LoongArch/ir-instruction/atomicrmw.ll b/llvm/test/CodeGen/LoongArch/ir-instruction/atomicrmw.ll
--- a/llvm/test/CodeGen/LoongArch/ir-instruction/atomicrmw.ll
+++ b/llvm/test/CodeGen/LoongArch/ir-instruction/atomicrmw.ll
@@ -143,3 +143,778 @@
   %1 = atomicrmw xchg ptr %a, i64 %b acquire
   ret i64 %1
 }
+
+define i8 @atomicrmw_add_i8_acquire(ptr %a, i8 %b) nounwind {
+; LA32-LABEL: atomicrmw_add_i8_acquire:
+; LA32:       # %bb.0:
+; LA32-NEXT:    addi.w $a2, $zero, -4
+; LA32-NEXT:    and $a2, $a0, $a2
+; LA32-NEXT:    slli.w $a0, $a0, 3
+; LA32-NEXT:    ori $a3, $zero, 255
+; LA32-NEXT:    sll.w $a3, $a3, $a0
+; LA32-NEXT:    andi $a1, $a1, 255
+; LA32-NEXT:    sll.w $a1, $a1, $a0
+; LA32-NEXT:  .LBB4_1: # =>This Inner Loop Header: Depth=1
+; LA32-NEXT:    dbar 0
+; LA32-NEXT:    ll.w $a4, $a2, 0
+; LA32-NEXT:    add.w $a5, $a4, $a1
+; LA32-NEXT:    xor $a5, $a4, $a5
+; LA32-NEXT:    and $a5, $a5, $a3
+; LA32-NEXT:    xor $a5, $a4, $a5
+; LA32-NEXT:    sc.w $a5, $a2, 0
+; LA32-NEXT:    beq $a5, $zero, .LBB4_1
+; LA32-NEXT:  # %bb.2:
+; LA32-NEXT:    srl.w $a0, $a4, $a0
+; LA32-NEXT:    ret
+;
+; LA64-LABEL: atomicrmw_add_i8_acquire:
+; LA64:       # %bb.0:
+; LA64-NEXT:    addi.w $a2, $zero, -4
+; LA64-NEXT:    and $a2, $a0, $a2
+; LA64-NEXT:    slli.d $a0, $a0, 3
+; LA64-NEXT:    ori $a3, $zero, 255
+; LA64-NEXT:    sll.w $a3, $a3, $a0
+; LA64-NEXT:    addi.w $a3, $a3, 0
+; LA64-NEXT:    andi $a1, $a1, 255
+; LA64-NEXT:    sll.w $a1, $a1, $a0
+; LA64-NEXT:    addi.w $a1, $a1, 0
+; LA64-NEXT:  .LBB4_1: # =>This Inner Loop Header: Depth=1
+; LA64-NEXT:    dbar 0
+; LA64-NEXT:    ll.w $a4, $a2, 0
+; LA64-NEXT:    add.w $a5, $a4, $a1
+; LA64-NEXT:    xor $a5, $a4, $a5
+; LA64-NEXT:    and $a5, $a5, $a3
+; LA64-NEXT:    xor $a5, $a4, $a5
+; LA64-NEXT:    sc.w $a5, $a2, 0
+; LA64-NEXT:    beq $a5, $zero, .LBB4_1
+; LA64-NEXT:  # %bb.2:
+; LA64-NEXT:    srl.w $a0, $a4, $a0
+; LA64-NEXT:    ret
+  %1 = atomicrmw add ptr %a, i8 %b acquire
+  ret i8 %1
+}
+
+define i16 @atomicrmw_add_i16_acquire(ptr %a, i16 %b) nounwind {
+; LA32-LABEL: atomicrmw_add_i16_acquire:
+; LA32:       # %bb.0:
+; LA32-NEXT:    addi.w $a2, $zero, -4
+; LA32-NEXT:    and $a2, $a0, $a2
+; LA32-NEXT:    slli.w $a0, $a0, 3
+; LA32-NEXT:    lu12i.w $a3, 15
+; LA32-NEXT:    ori $a3, $a3, 4095
+; LA32-NEXT:    sll.w $a3, $a3, $a0
+; LA32-NEXT:    bstrpick.w $a1, $a1, 15, 0
+; LA32-NEXT:    sll.w $a1, $a1, $a0
+; LA32-NEXT:  .LBB5_1: # =>This Inner Loop Header: Depth=1
+; LA32-NEXT:    dbar 0
+; LA32-NEXT:    ll.w $a4, $a2, 0
+; LA32-NEXT:    add.w $a5, $a4, $a1
+; LA32-NEXT:    xor $a5, $a4, $a5
+; LA32-NEXT:    and $a5, $a5, $a3
+; LA32-NEXT:    xor $a5, $a4, $a5
+; LA32-NEXT:    sc.w $a5, $a2, 0
+; LA32-NEXT:    beq $a5, $zero, .LBB5_1
+; LA32-NEXT:  # %bb.2:
+; LA32-NEXT:    srl.w $a0, $a4, $a0
+; LA32-NEXT:    ret
+;
+; LA64-LABEL: atomicrmw_add_i16_acquire:
+; LA64:       # %bb.0:
+; LA64-NEXT:    addi.w $a2, $zero, -4
+; LA64-NEXT:    and $a2, $a0, $a2
+; LA64-NEXT:    slli.d $a0, $a0, 3
+; LA64-NEXT:    lu12i.w $a3, 15
+; LA64-NEXT:    ori $a3, $a3, 4095
+; LA64-NEXT:    sll.w $a3, $a3, $a0
+; LA64-NEXT:    addi.w $a3, $a3, 0
+; LA64-NEXT:    bstrpick.d $a1, $a1, 15, 0
+; LA64-NEXT:    sll.w $a1, $a1, $a0
+; LA64-NEXT:    addi.w $a1, $a1, 0
+; LA64-NEXT:  .LBB5_1: # =>This Inner Loop Header: Depth=1
+; LA64-NEXT:    dbar 0
+; LA64-NEXT:    ll.w $a4, $a2, 0
+; LA64-NEXT:    add.w $a5, $a4, $a1
+; LA64-NEXT:    xor $a5, $a4, $a5
+; LA64-NEXT:    and $a5, $a5, $a3
+; LA64-NEXT:    xor $a5, $a4, $a5
+; LA64-NEXT:    sc.w $a5, $a2, 0
+; LA64-NEXT:    beq $a5, $zero, .LBB5_1
+; LA64-NEXT:  # %bb.2:
+; LA64-NEXT:    srl.w $a0, $a4, $a0
+; LA64-NEXT:    ret
+  %1 = atomicrmw add ptr %a, i16 %b acquire
+  ret i16 %1
+}
+
+define i32 @atomicrmw_add_i32_acquire(ptr %a, i32 %b) nounwind {
+; LA32-LABEL: atomicrmw_add_i32_acquire:
+; LA32:       # %bb.0:
+; LA32-NEXT:  .LBB6_1: # =>This Inner Loop Header: Depth=1
+; LA32-NEXT:    dbar 0
+; LA32-NEXT:    ll.w $a2, $a1, 0
+; LA32-NEXT:    add.w $a3, $a2, $a0
+; LA32-NEXT:    sc.w $a3, $a1, 0
+; LA32-NEXT:    beq $a3, $zero, .LBB6_1
+; LA32-NEXT:  # %bb.2:
+; LA32-NEXT:    move $a0, $a2
+; LA32-NEXT:    ret
+;
+; LA64-LABEL: atomicrmw_add_i32_acquire:
+; LA64:       # %bb.0:
+; LA64-NEXT:    amadd_db.w $a0, $a1, $a0
+; LA64-NEXT:    ret
+  %1 = atomicrmw add ptr %a, i32 %b acquire
+  ret i32 %1
+}
+
+define i64 @atomicrmw_add_i64_acquire(ptr %a, i64 %b) nounwind {
+; LA32-LABEL: atomicrmw_add_i64_acquire:
+; LA32:       # %bb.0:
+; LA32-NEXT:    addi.w $sp, $sp, -16
+; LA32-NEXT:    st.w $ra, $sp, 12 # 4-byte Folded Spill
+; LA32-NEXT:    ori $a3, $zero, 2
+; LA32-NEXT:    bl %plt(__atomic_fetch_add_8)
+; LA32-NEXT:    ld.w $ra, $sp, 12 # 4-byte Folded Reload
+; LA32-NEXT:    addi.w $sp, $sp, 16
+; LA32-NEXT:    ret
+;
+; LA64-LABEL: atomicrmw_add_i64_acquire:
+; LA64:       # %bb.0:
+; LA64-NEXT:    amadd_db.d $a0, $a1, $a0
+; LA64-NEXT:    ret
+  %1 = atomicrmw add ptr %a, i64 %b acquire
+  ret i64 %1
+}
+
+define i8 @atomicrmw_sub_i8_acquire(ptr %a, i8 %b) nounwind {
+; LA32-LABEL: atomicrmw_sub_i8_acquire:
+; LA32:       # %bb.0:
+; LA32-NEXT:    addi.w $a2, $zero, -4
+; LA32-NEXT:    and $a2, $a0, $a2
+; LA32-NEXT:    slli.w $a0, $a0, 3
+; LA32-NEXT:    ori $a3, $zero, 255
+; LA32-NEXT:    sll.w $a3, $a3, $a0
+; LA32-NEXT:    andi $a1, $a1, 255
+; LA32-NEXT:    sll.w $a1, $a1, $a0
+; LA32-NEXT:  .LBB8_1: # =>This Inner Loop Header: Depth=1
+; LA32-NEXT:    dbar 0
+; LA32-NEXT:    ll.w $a4, $a2, 0
+; LA32-NEXT:    sub.w $a5, $a4, $a1
+; LA32-NEXT:    xor $a5, $a4, $a5
+; LA32-NEXT:    and $a5, $a5, $a3
+; LA32-NEXT:    xor $a5, $a4, $a5
+; LA32-NEXT:    sc.w $a5, $a2, 0
+; LA32-NEXT:    beq $a5, $zero, .LBB8_1
+; LA32-NEXT:  # %bb.2:
+; LA32-NEXT:    srl.w $a0, $a4, $a0
+; LA32-NEXT:    ret
+;
+; LA64-LABEL: atomicrmw_sub_i8_acquire:
+; LA64:       # %bb.0:
+; LA64-NEXT:    addi.w $a2, $zero, -4
+; LA64-NEXT:    and $a2, $a0, $a2
+; LA64-NEXT:    slli.d $a0, $a0, 3
+; LA64-NEXT:    ori $a3, $zero, 255
+; LA64-NEXT:    sll.w $a3, $a3, $a0
+; LA64-NEXT:    addi.w $a3, $a3, 0
+; LA64-NEXT:    andi $a1, $a1, 255
+; LA64-NEXT:    sll.w $a1, $a1, $a0
+; LA64-NEXT:    addi.w $a1, $a1, 0
+; LA64-NEXT:  .LBB8_1: # =>This Inner Loop Header: Depth=1
+; LA64-NEXT:    dbar 0
+; LA64-NEXT:    ll.w $a4, $a2, 0
+; LA64-NEXT:    sub.w $a5, $a4, $a1
+; LA64-NEXT:    xor $a5, $a4, $a5
+; LA64-NEXT:    and $a5, $a5, $a3
+; LA64-NEXT:    xor $a5, $a4, $a5
+; LA64-NEXT:    sc.w $a5, $a2, 0
+; LA64-NEXT:    beq $a5, $zero, .LBB8_1
+; LA64-NEXT:  # %bb.2:
+; LA64-NEXT:    srl.w $a0, $a4, $a0
+; LA64-NEXT:    ret
+  %1 = atomicrmw sub ptr %a, i8 %b acquire
+  ret i8 %1
+}
+
+define i16 @atomicrmw_sub_i16_acquire(ptr %a, i16 %b) nounwind {
+; LA32-LABEL: atomicrmw_sub_i16_acquire:
+; LA32:       # %bb.0:
+; LA32-NEXT:    addi.w $a2, $zero, -4
+; LA32-NEXT:    and $a2, $a0, $a2
+; LA32-NEXT:    slli.w $a0, $a0, 3
+; LA32-NEXT:    lu12i.w $a3, 15
+; LA32-NEXT:    ori $a3, $a3, 4095
+; LA32-NEXT:    sll.w $a3, $a3, $a0
+; LA32-NEXT:    bstrpick.w $a1, $a1, 15, 0
+; LA32-NEXT:    sll.w $a1, $a1, $a0
+; LA32-NEXT:  .LBB9_1: # =>This Inner Loop Header: Depth=1
+; LA32-NEXT:    dbar 0
+; LA32-NEXT:    ll.w $a4, $a2, 0
+; LA32-NEXT:    sub.w $a5, $a4, $a1
+; LA32-NEXT:    xor $a5, $a4, $a5
+; LA32-NEXT:    and $a5, $a5, $a3
+; LA32-NEXT:    xor $a5, $a4, $a5
+; LA32-NEXT:    sc.w $a5, $a2, 0
+; LA32-NEXT:    beq $a5, $zero, .LBB9_1
+; LA32-NEXT:  # %bb.2:
+; LA32-NEXT:    srl.w $a0, $a4, $a0
+; LA32-NEXT:    ret
+;
+; LA64-LABEL: atomicrmw_sub_i16_acquire:
+; LA64:       # %bb.0:
+; LA64-NEXT:    addi.w $a2, $zero, -4
+; LA64-NEXT:    and $a2, $a0, $a2
+; LA64-NEXT:    slli.d $a0, $a0, 3
+; LA64-NEXT:    lu12i.w $a3, 15
+; LA64-NEXT:    ori $a3, $a3, 4095
+; LA64-NEXT:    sll.w $a3, $a3, $a0
+; LA64-NEXT:    addi.w $a3, $a3, 0
+; LA64-NEXT:    bstrpick.d $a1, $a1, 15, 0
+; LA64-NEXT:    sll.w $a1, $a1, $a0
+; LA64-NEXT:    addi.w $a1, $a1, 0
+; LA64-NEXT:  .LBB9_1: # =>This Inner Loop Header: Depth=1
+; LA64-NEXT:    dbar 0
+; LA64-NEXT:    ll.w $a4, $a2, 0
+; LA64-NEXT:    sub.w $a5, $a4, $a1
+; LA64-NEXT:    xor $a5, $a4, $a5
+; LA64-NEXT:    and $a5, $a5, $a3
+; LA64-NEXT:    xor $a5, $a4, $a5
+; LA64-NEXT:    sc.w $a5, $a2, 0
+; LA64-NEXT:    beq $a5, $zero, .LBB9_1
+; LA64-NEXT:  # %bb.2:
+; LA64-NEXT:    srl.w $a0, $a4, $a0
+; LA64-NEXT:    ret
+  %1 = atomicrmw sub ptr %a, i16 %b acquire
+  ret i16 %1
+}
+
+define i32 @atomicrmw_sub_i32_acquire(ptr %a, i32 %b) nounwind {
+; LA32-LABEL: atomicrmw_sub_i32_acquire:
+; LA32:       # %bb.0:
+; LA32-NEXT:  .LBB10_1: # =>This Inner Loop Header: Depth=1
+; LA32-NEXT:    dbar 0
+; LA32-NEXT:    ll.w $a2, $a1, 0
+; LA32-NEXT:    sub.w $a3, $a2, $a0
+; LA32-NEXT:    sc.w $a3, $a1, 0
+; LA32-NEXT:    beq $a3, $zero, .LBB10_1
+; LA32-NEXT:  # %bb.2:
+; LA32-NEXT:    move $a0, $a2
+; LA32-NEXT:    ret
+;
+; LA64-LABEL: atomicrmw_sub_i32_acquire:
+; LA64:       # %bb.0:
+; LA64-NEXT:    sub.w $a1, $zero, $a1
+; LA64-NEXT:    amadd_db.w $a0, $a1, $a0
+; LA64-NEXT:    ret
+  %1 = atomicrmw sub ptr %a, i32 %b acquire
+  ret i32 %1
+}
+
+define i64 @atomicrmw_sub_i64_acquire(ptr %a, i64 %b) nounwind {
+; LA32-LABEL: atomicrmw_sub_i64_acquire:
+; LA32:       # %bb.0:
+; LA32-NEXT:    addi.w $sp, $sp, -16
+; LA32-NEXT:    st.w $ra, $sp, 12 # 4-byte Folded Spill
+; LA32-NEXT:    ori $a3, $zero, 2
+; LA32-NEXT:    bl %plt(__atomic_fetch_sub_8)
+; LA32-NEXT:    ld.w $ra, $sp, 12 # 4-byte Folded Reload
+; LA32-NEXT:    addi.w $sp, $sp, 16
+; LA32-NEXT:    ret
+;
+; LA64-LABEL: atomicrmw_sub_i64_acquire:
+; LA64:       # %bb.0:
+; LA64-NEXT:    sub.d $a1, $zero, $a1
+; LA64-NEXT:    amadd_db.d $a0, $a1, $a0
+; LA64-NEXT:    ret
+  %1 = atomicrmw sub ptr %a, i64 %b acquire
+  ret i64 %1
+}
+
+define i8 @atomicrmw_nand_i8_acquire(ptr %a, i8 %b) nounwind {
+; LA32-LABEL: atomicrmw_nand_i8_acquire:
+; LA32:       # %bb.0:
+; LA32-NEXT:    addi.w $a2, $zero, -4
+; LA32-NEXT:    and $a2, $a0, $a2
+; LA32-NEXT:    slli.w $a0, $a0, 3
+; LA32-NEXT:    ori $a3, $zero, 255
+; LA32-NEXT:    sll.w $a3, $a3, $a0
+; LA32-NEXT:    andi $a1, $a1, 255
+; LA32-NEXT:    sll.w $a1, $a1, $a0
+; LA32-NEXT:  .LBB12_1: # =>This Inner Loop Header: Depth=1
+; LA32-NEXT:    dbar 0
+; LA32-NEXT:    ll.w $a4, $a2, 0
+; LA32-NEXT:    and $a5, $a4, $a1
+; LA32-NEXT:    xori $a5, $a5, -1
+; LA32-NEXT:    xor $a5, $a4, $a5
+; LA32-NEXT:    and $a5, $a5, $a3
+; LA32-NEXT:    xor $a5, $a4, $a5
+; LA32-NEXT:    sc.w $a5, $a2, 0
+; LA32-NEXT:    beq $a5, $zero, .LBB12_1
+; LA32-NEXT:  # %bb.2:
+; LA32-NEXT:    srl.w $a0, $a4, $a0
+; LA32-NEXT:    ret
+;
+; LA64-LABEL: atomicrmw_nand_i8_acquire:
+; LA64:       # %bb.0:
+; LA64-NEXT:    addi.w $a2, $zero, -4
+; LA64-NEXT:    and $a2, $a0, $a2
+; LA64-NEXT:    slli.d $a0, $a0, 3
+; LA64-NEXT:    ori $a3, $zero, 255
+; LA64-NEXT:    sll.w $a3, $a3, $a0
+; LA64-NEXT:    addi.w $a3, $a3, 0
+; LA64-NEXT:    andi $a1, $a1, 255
+; LA64-NEXT:    sll.w $a1, $a1, $a0
+; LA64-NEXT:    addi.w $a1, $a1, 0
+; LA64-NEXT:  .LBB12_1: # =>This Inner Loop Header: Depth=1
+; LA64-NEXT:    dbar 0
+; LA64-NEXT:    ll.w $a4, $a2, 0
+; LA64-NEXT:    and $a5, $a4, $a1
+; LA64-NEXT:    xori $a5, $a5, -1
+; LA64-NEXT:    xor $a5, $a4, $a5
+; LA64-NEXT:    and $a5, $a5, $a3
+; LA64-NEXT:    xor $a5, $a4, $a5
+; LA64-NEXT:    sc.w $a5, $a2, 0
+; LA64-NEXT:    beq $a5, $zero, .LBB12_1
+; LA64-NEXT:  # %bb.2:
+; LA64-NEXT:    srl.w $a0, $a4, $a0
+; LA64-NEXT:    ret
+  %1 = atomicrmw nand ptr %a, i8 %b acquire
+  ret i8 %1
+}
+
+define i16 @atomicrmw_nand_i16_acquire(ptr %a, i16 %b) nounwind {
+; LA32-LABEL: atomicrmw_nand_i16_acquire:
+; LA32:       # %bb.0:
+; LA32-NEXT:    addi.w $a2, $zero, -4
+; LA32-NEXT:    and $a2, $a0, $a2
+; LA32-NEXT:    slli.w $a0, $a0, 3
+; LA32-NEXT:    lu12i.w $a3, 15
+; LA32-NEXT:    ori $a3, $a3, 4095
+; LA32-NEXT:    sll.w $a3, $a3, $a0
+; LA32-NEXT:    bstrpick.w $a1, $a1, 15, 0
+; LA32-NEXT:    sll.w $a1, $a1, $a0
+; LA32-NEXT:  .LBB13_1: # =>This Inner Loop Header: Depth=1
+; LA32-NEXT:    dbar 0
+; LA32-NEXT:    ll.w $a4, $a2, 0
+; LA32-NEXT:    and $a5, $a4, $a1
+; LA32-NEXT:    xori $a5, $a5, -1
+; LA32-NEXT:    xor $a5, $a4, $a5
+; LA32-NEXT:    and $a5, $a5, $a3
+; LA32-NEXT:    xor $a5, $a4, $a5
+; LA32-NEXT:    sc.w $a5, $a2, 0
+; LA32-NEXT:    beq $a5, $zero, .LBB13_1
+; LA32-NEXT:  # %bb.2:
+; LA32-NEXT:    srl.w $a0, $a4, $a0
+; LA32-NEXT:    ret
+;
+; LA64-LABEL: atomicrmw_nand_i16_acquire:
+; LA64:       # %bb.0:
+; LA64-NEXT:    addi.w $a2, $zero, -4
+; LA64-NEXT:    and $a2, $a0, $a2
+; LA64-NEXT:    slli.d $a0, $a0, 3
+; LA64-NEXT:    lu12i.w $a3, 15
+; LA64-NEXT:    ori $a3, $a3, 4095
+; LA64-NEXT:    sll.w $a3, $a3, $a0
+; LA64-NEXT:    addi.w $a3, $a3, 0
+; LA64-NEXT:    bstrpick.d $a1, $a1, 15, 0
+; LA64-NEXT:    sll.w $a1, $a1, $a0
+; LA64-NEXT:    addi.w $a1, $a1, 0
+; LA64-NEXT:  .LBB13_1: # =>This Inner Loop Header: Depth=1
+; LA64-NEXT:    dbar 0
+; LA64-NEXT:    ll.w $a4, $a2, 0
+; LA64-NEXT:    and $a5, $a4, $a1
+; LA64-NEXT:    xori $a5, $a5, -1
+; LA64-NEXT:    xor $a5, $a4, $a5
+; LA64-NEXT:    and $a5, $a5, $a3
+; LA64-NEXT:    xor $a5, $a4, $a5
+; LA64-NEXT:    sc.w $a5, $a2, 0
+; LA64-NEXT:    beq $a5, $zero, .LBB13_1
+; LA64-NEXT:  # %bb.2:
+; LA64-NEXT:    srl.w $a0, $a4, $a0
+; LA64-NEXT:    ret
+  %1 = atomicrmw nand ptr %a, i16 %b acquire
+  ret i16 %1
+}
+
+define i32 @atomicrmw_nand_i32_acquire(ptr %a, i32 %b) nounwind {
+; LA32-LABEL: atomicrmw_nand_i32_acquire:
+; LA32:       # %bb.0:
+; LA32-NEXT:  .LBB14_1: # =>This Inner Loop Header: Depth=1
+; LA32-NEXT:    dbar 0
+; LA32-NEXT:    ll.w $a2, $a1, 0
+; LA32-NEXT:    and $a3, $a2, $a0
+; LA32-NEXT:    xori $a3, $a3, -1
+; LA32-NEXT:    sc.w $a3, $a1, 0
+; LA32-NEXT:    beq $a3, $zero, .LBB14_1
+; LA32-NEXT:  # %bb.2:
+; LA32-NEXT:    move $a0, $a2
+; LA32-NEXT:    ret
+;
+; LA64-LABEL: atomicrmw_nand_i32_acquire:
+; LA64:       # %bb.0:
+; LA64-NEXT:  .LBB14_1: # =>This Inner Loop Header: Depth=1
+; LA64-NEXT:    dbar 0
+; LA64-NEXT:    ll.w $a2, $a1, 0
+; LA64-NEXT:    and $a3, $a2, $a0
+; LA64-NEXT:    xori $a3, $a3, -1
+; LA64-NEXT:    sc.w $a3, $a1, 0
+; LA64-NEXT:    beq $a3, $zero, .LBB14_1
+; LA64-NEXT:  # %bb.2:
+; LA64-NEXT:    move $a0, $a2
+; LA64-NEXT:    ret
+  %1 = atomicrmw nand ptr %a, i32 %b acquire
+  ret i32 %1
+}
+
+define i64 @atomicrmw_nand_i64_acquire(ptr %a, i64 %b) nounwind {
+; LA32-LABEL: atomicrmw_nand_i64_acquire:
+; LA32:       # %bb.0:
+; LA32-NEXT:    addi.w $sp, $sp, -16
+; LA32-NEXT:    st.w $ra, $sp, 12 # 4-byte Folded Spill
+; LA32-NEXT:    ori $a3, $zero, 2
+; LA32-NEXT:    bl %plt(__atomic_fetch_nand_8)
+; LA32-NEXT:    ld.w $ra, $sp, 12 # 4-byte Folded Reload
+; LA32-NEXT:    addi.w $sp, $sp, 16
+; LA32-NEXT:    ret
+;
+; LA64-LABEL: atomicrmw_nand_i64_acquire:
+; LA64:       # %bb.0:
+; LA64-NEXT:  .LBB15_1: # =>This Inner Loop Header: Depth=1
+; LA64-NEXT:    dbar 0
+; LA64-NEXT:    ll.d $a2, $a1, 0
+; LA64-NEXT:    and $a3, $a2, $a0
+; LA64-NEXT:    xori $a3, $a3, -1
+; LA64-NEXT:    sc.d $a3, $a1, 0
+; LA64-NEXT:    beq $a3, $zero, .LBB15_1
+; LA64-NEXT:  # %bb.2:
+; LA64-NEXT:    move $a0, $a2
+; LA64-NEXT:    ret
+  %1 = atomicrmw nand ptr %a, i64 %b acquire
+  ret i64 %1
+}
+
+define i8 @atomicrmw_and_i8_acquire(ptr %a, i8 %b) nounwind {
+; LA32-LABEL: atomicrmw_and_i8_acquire:
+; LA32:       # %bb.0:
+; LA32-NEXT:    slli.w $a2, $a0, 3
+; LA32-NEXT:    ori $a3, $zero, 255
+; LA32-NEXT:    sll.w $a3, $a3, $a2
+; LA32-NEXT:    andi $a1, $a1, 255
+; LA32-NEXT:    sll.w $a1, $a1, $a2
+; LA32-NEXT:    orn $a1, $a1, $a3
+; LA32-NEXT:    addi.w $a3, $zero, -4
+; LA32-NEXT:    and $a0, $a0, $a3
+; LA32-NEXT:  .LBB16_1: # =>This Inner Loop Header: Depth=1
+; LA32-NEXT:    dbar 0
+; LA32-NEXT:    ll.w $a3, $a1, 0
+; LA32-NEXT:    and $a4, $a3, $a0
+; LA32-NEXT:    sc.w $a4, $a1, 0
+; LA32-NEXT:    beq $a4, $zero, .LBB16_1
+; LA32-NEXT:  # %bb.2:
+; LA32-NEXT:    srl.w $a0, $a3, $a2
+; LA32-NEXT:    ret
+;
+; LA64-LABEL: atomicrmw_and_i8_acquire:
+; LA64:       # %bb.0:
+; LA64-NEXT:    slli.d $a2, $a0, 3
+; LA64-NEXT:    ori $a3, $zero, 255
+; LA64-NEXT:    sll.w $a3, $a3, $a2
+; LA64-NEXT:    andi $a1, $a1, 255
+; LA64-NEXT:    sll.w $a1, $a1, $a2
+; LA64-NEXT:    orn $a1, $a1, $a3
+; LA64-NEXT:    addi.w $a3, $zero, -4
+; LA64-NEXT:    and $a0, $a0, $a3
+; LA64-NEXT:    amand_db.w $a0, $a1, $a0
+; LA64-NEXT:    srl.w $a0, $a0, $a2
+; LA64-NEXT:    ret
+  %1 = atomicrmw and ptr %a, i8 %b acquire
+  ret i8 %1
+}
+
+define i16 @atomicrmw_and_i16_acquire(ptr %a, i16 %b) nounwind {
+; LA32-LABEL: atomicrmw_and_i16_acquire:
+; LA32:       # %bb.0:
+; LA32-NEXT:    lu12i.w $a2, 15
+; LA32-NEXT:    ori $a2, $a2, 4095
+; LA32-NEXT:    slli.w $a3, $a0, 3
+; LA32-NEXT:    sll.w $a2, $a2, $a3
+; LA32-NEXT:    bstrpick.w $a1, $a1, 15, 0
+; LA32-NEXT:    sll.w $a1, $a1, $a3
+; LA32-NEXT:    orn $a1, $a1, $a2
+; LA32-NEXT:    addi.w $a2, $zero, -4
+; LA32-NEXT:    and $a0, $a0, $a2
+; LA32-NEXT:  .LBB17_1: # =>This Inner Loop Header: Depth=1
+; LA32-NEXT:    dbar 0
+; LA32-NEXT:    ll.w $a2, $a1, 0
+; LA32-NEXT:    and $a4, $a2, $a0
+; LA32-NEXT:    sc.w $a4, $a1, 0
+; LA32-NEXT:    beq $a4, $zero, .LBB17_1
+; LA32-NEXT:  # %bb.2:
+; LA32-NEXT:    srl.w $a0, $a2, $a3
+; LA32-NEXT:    ret
+;
+; LA64-LABEL: atomicrmw_and_i16_acquire:
+; LA64:       # %bb.0:
+; LA64-NEXT:    lu12i.w $a2, 15
+; LA64-NEXT:    ori $a2, $a2, 4095
+; LA64-NEXT:    slli.d $a3, $a0, 3
+; LA64-NEXT:    sll.w $a2, $a2, $a3
+; LA64-NEXT:    bstrpick.d $a1, $a1, 15, 0
+; LA64-NEXT:    sll.w $a1, $a1, $a3
+; LA64-NEXT:    orn $a1, $a1, $a2
+; LA64-NEXT:    addi.w $a2, $zero, -4
+; LA64-NEXT:    and $a0, $a0, $a2
+; LA64-NEXT:    amand_db.w $a0, $a1, $a0
+; LA64-NEXT:    srl.w $a0, $a0, $a3
+; LA64-NEXT:    ret
+  %1 = atomicrmw and ptr %a, i16 %b acquire
+  ret i16 %1
+}
+
+define i32 @atomicrmw_and_i32_acquire(ptr %a, i32 %b) nounwind {
+; LA32-LABEL: atomicrmw_and_i32_acquire:
+; LA32:       # %bb.0:
+; LA32-NEXT:  .LBB18_1: # =>This Inner Loop Header: Depth=1
+; LA32-NEXT:    dbar 0
+; LA32-NEXT:    ll.w $a2, $a1, 0
+; LA32-NEXT:    and $a3, $a2, $a0
+; LA32-NEXT:    sc.w $a3, $a1, 0
+; LA32-NEXT:    beq $a3, $zero, .LBB18_1
+; LA32-NEXT:  # %bb.2:
+; LA32-NEXT:    move $a0, $a2
+; LA32-NEXT:    ret
+;
+; LA64-LABEL: atomicrmw_and_i32_acquire:
+; LA64:       # %bb.0:
+; LA64-NEXT:    amand_db.w $a0, $a1, $a0
+; LA64-NEXT:    ret
+  %1 = atomicrmw and ptr %a, i32 %b acquire
+  ret i32 %1
+}
+
+define i64 @atomicrmw_and_i64_acquire(ptr %a, i64 %b) nounwind {
+; LA32-LABEL: atomicrmw_and_i64_acquire:
+; LA32:       # %bb.0:
+; LA32-NEXT:    addi.w $sp, $sp, -16
+; LA32-NEXT:    st.w $ra, $sp, 12 # 4-byte Folded Spill
+; LA32-NEXT:    ori $a3, $zero, 2
+; LA32-NEXT:    bl %plt(__atomic_fetch_and_8)
+; LA32-NEXT:    ld.w $ra, $sp, 12 # 4-byte Folded Reload
+; LA32-NEXT:    addi.w $sp, $sp, 16
+; LA32-NEXT:    ret
+;
+; LA64-LABEL: atomicrmw_and_i64_acquire:
+; LA64:       # %bb.0:
+; LA64-NEXT:    amand_db.d $a0, $a1, $a0
+; LA64-NEXT:    ret
+  %1 = atomicrmw and ptr %a, i64 %b acquire
+  ret i64 %1
+}
+
+define i8 @atomicrmw_or_i8_acquire(ptr %a, i8 %b) nounwind {
+; LA32-LABEL: atomicrmw_or_i8_acquire:
+; LA32:       # %bb.0:
+; LA32-NEXT:    addi.w $a2, $zero, -4
+; LA32-NEXT:    and $a2, $a0, $a2
+; LA32-NEXT:    slli.w $a0, $a0, 3
+; LA32-NEXT:    andi $a1, $a1, 255
+; LA32-NEXT:    sll.w $a1, $a1, $a0
+; LA32-NEXT:  .LBB20_1: # =>This Inner Loop Header: Depth=1
+; LA32-NEXT:    dbar 0
+; LA32-NEXT:    ll.w $a3, $a1, 0
+; LA32-NEXT:    or $a4, $a3, $a2
+; LA32-NEXT:    sc.w $a4, $a1, 0
+; LA32-NEXT:    beq $a4, $zero, .LBB20_1
+; LA32-NEXT:  # %bb.2:
+; LA32-NEXT:    srl.w $a0, $a3, $a0
+; LA32-NEXT:    ret
+;
+; LA64-LABEL: atomicrmw_or_i8_acquire:
+; LA64:       # %bb.0:
+; LA64-NEXT:    addi.w $a2, $zero, -4
+; LA64-NEXT:    and $a2, $a0, $a2
+; LA64-NEXT:    slli.d $a0, $a0, 3
+; LA64-NEXT:    andi $a1, $a1, 255
+; LA64-NEXT:    sll.w $a1, $a1, $a0
+; LA64-NEXT:    amor_db.w $a1, $a1, $a2
+; LA64-NEXT:    srl.w $a0, $a1, $a0
+; LA64-NEXT:    ret
+  %1 = atomicrmw or ptr %a, i8 %b acquire
+  ret i8 %1
+}
+
+define i16 @atomicrmw_or_i16_acquire(ptr %a, i16 %b) nounwind {
+; LA32-LABEL: atomicrmw_or_i16_acquire:
+; LA32:       # %bb.0:
+; LA32-NEXT:    addi.w $a2, $zero, -4
+; LA32-NEXT:    and $a2, $a0, $a2
+; LA32-NEXT:    slli.w $a0, $a0, 3
+; LA32-NEXT:    bstrpick.w $a1, $a1, 15, 0
+; LA32-NEXT:    sll.w $a1, $a1, $a0
+; LA32-NEXT:  .LBB21_1: # =>This Inner Loop Header: Depth=1
+; LA32-NEXT:    dbar 0
+; LA32-NEXT:    ll.w $a3, $a1, 0
+; LA32-NEXT:    or $a4, $a3, $a2
+; LA32-NEXT:    sc.w $a4, $a1, 0
+; LA32-NEXT:    beq $a4, $zero, .LBB21_1
+; LA32-NEXT:  # %bb.2:
+; LA32-NEXT:    srl.w $a0, $a3, $a0
+; LA32-NEXT:    ret
+;
+; LA64-LABEL: atomicrmw_or_i16_acquire:
+; LA64:       # %bb.0:
+; LA64-NEXT:    addi.w $a2, $zero, -4
+; LA64-NEXT:    and $a2, $a0, $a2
+; LA64-NEXT:    slli.d $a0, $a0, 3
+; LA64-NEXT:    bstrpick.d $a1, $a1, 15, 0
+; LA64-NEXT:    sll.w $a1, $a1, $a0
+; LA64-NEXT:    amor_db.w $a1, $a1, $a2
+; LA64-NEXT:    srl.w $a0, $a1, $a0
+; LA64-NEXT:    ret
+  %1 = atomicrmw or ptr %a, i16 %b acquire
+  ret i16 %1
+}
+
+define i32 @atomicrmw_or_i32_acquire(ptr %a, i32 %b) nounwind {
+; LA32-LABEL: atomicrmw_or_i32_acquire:
+; LA32:       # %bb.0:
+; LA32-NEXT:  .LBB22_1: # =>This Inner Loop Header: Depth=1
+; LA32-NEXT:    dbar 0
+; LA32-NEXT:    ll.w $a2, $a1, 0
+; LA32-NEXT:    or $a3, $a2, $a0
+; LA32-NEXT:    sc.w $a3, $a1, 0
+; LA32-NEXT:    beq $a3, $zero, .LBB22_1
+; LA32-NEXT:  # %bb.2:
+; LA32-NEXT:    move $a0, $a2
+; LA32-NEXT:    ret
+;
+; LA64-LABEL: atomicrmw_or_i32_acquire:
+; LA64:       # %bb.0:
+; LA64-NEXT:    amor_db.w $a0, $a1, $a0
+; LA64-NEXT:    ret
+  %1 = atomicrmw or ptr %a, i32 %b acquire
+  ret i32 %1
+}
+
+define i64 @atomicrmw_or_i64_acquire(ptr %a, i64 %b) nounwind {
+; LA32-LABEL: atomicrmw_or_i64_acquire:
+; LA32:       # %bb.0:
+; LA32-NEXT:    addi.w $sp, $sp, -16
+; LA32-NEXT:    st.w $ra, $sp, 12 # 4-byte Folded Spill
+; LA32-NEXT:    ori $a3, $zero, 2
+; LA32-NEXT:    bl %plt(__atomic_fetch_or_8)
+; LA32-NEXT:    ld.w $ra, $sp, 12 # 4-byte Folded Reload
+; LA32-NEXT:    addi.w $sp, $sp, 16
+; LA32-NEXT:    ret
+;
+; LA64-LABEL: atomicrmw_or_i64_acquire:
+; LA64:       # %bb.0:
+; LA64-NEXT:    amor_db.d $a0, $a1, $a0
+; LA64-NEXT:    ret
+  %1 = atomicrmw or ptr %a, i64 %b acquire
+  ret i64 %1
+}
+
+define i8 @atomicrmw_xor_i8_acquire(ptr %a, i8 %b) nounwind {
+; LA32-LABEL: atomicrmw_xor_i8_acquire:
+; LA32:       # %bb.0:
+; LA32-NEXT:    addi.w $a2, $zero, -4
+; LA32-NEXT:    and $a2, $a0, $a2
+; LA32-NEXT:    slli.w $a0, $a0, 3
+; LA32-NEXT:    andi $a1, $a1, 255
+; LA32-NEXT:    sll.w $a1, $a1, $a0
+; LA32-NEXT:  .LBB24_1: # =>This Inner Loop Header: Depth=1
+; LA32-NEXT:    dbar 0
+; LA32-NEXT:    ll.w $a3, $a1, 0
+; LA32-NEXT:    xor $a4, $a3, $a2
+; LA32-NEXT:    sc.w $a4, $a1, 0
+; LA32-NEXT:    beq $a4, $zero, .LBB24_1
+; LA32-NEXT:  # %bb.2:
+; LA32-NEXT:    srl.w $a0, $a3, $a0
+; LA32-NEXT:    ret
+;
+; LA64-LABEL: atomicrmw_xor_i8_acquire:
+; LA64:       # %bb.0:
+; LA64-NEXT:    addi.w $a2, $zero, -4
+; LA64-NEXT:    and $a2, $a0, $a2
+; LA64-NEXT:    slli.d $a0, $a0, 3
+; LA64-NEXT:    andi $a1, $a1, 255
+; LA64-NEXT:    sll.w $a1, $a1, $a0
+; LA64-NEXT:    amxor_db.w $a1, $a1, $a2
+; LA64-NEXT:    srl.w $a0, $a1, $a0
+; LA64-NEXT:    ret
+  %1 = atomicrmw xor ptr %a, i8 %b acquire
+  ret i8 %1
+}
+
+define i16 @atomicrmw_xor_i16_acquire(ptr %a, i16 %b) nounwind {
+; LA32-LABEL: atomicrmw_xor_i16_acquire:
+; LA32:       # %bb.0:
+; LA32-NEXT:    addi.w $a2, $zero, -4
+; LA32-NEXT:    and $a2, $a0, $a2
+; LA32-NEXT:    slli.w $a0, $a0, 3
+; LA32-NEXT:    bstrpick.w $a1, $a1, 15, 0
+; LA32-NEXT:    sll.w $a1, $a1, $a0
+; LA32-NEXT:  .LBB25_1: # =>This Inner Loop Header: Depth=1
+; LA32-NEXT:    dbar 0
+; LA32-NEXT:    ll.w $a3, $a1, 0
+; LA32-NEXT:    xor $a4, $a3, $a2
+; LA32-NEXT:    sc.w $a4, $a1, 0
+; LA32-NEXT:    beq $a4, $zero, .LBB25_1
+; LA32-NEXT:  # %bb.2:
+; LA32-NEXT:    srl.w $a0, $a3, $a0
+; LA32-NEXT:    ret
+;
+; LA64-LABEL: atomicrmw_xor_i16_acquire:
+; LA64:       # %bb.0:
+; LA64-NEXT:    addi.w $a2, $zero, -4
+; LA64-NEXT:    and $a2, $a0, $a2
+; LA64-NEXT:    slli.d $a0, $a0, 3
+; LA64-NEXT:    bstrpick.d $a1, $a1, 15, 0
+; LA64-NEXT:    sll.w $a1, $a1, $a0
+; LA64-NEXT:    amxor_db.w $a1, $a1, $a2
+; LA64-NEXT:    srl.w $a0, $a1, $a0
+; LA64-NEXT:    ret
+  %1 = atomicrmw xor ptr %a, i16 %b acquire
+  ret i16 %1
+}
+
+define i32 @atomicrmw_xor_i32_acquire(ptr %a, i32 %b) nounwind {
+; LA32-LABEL: atomicrmw_xor_i32_acquire:
+; LA32:       # %bb.0:
+; LA32-NEXT:  .LBB26_1: # =>This Inner Loop Header: Depth=1
+; LA32-NEXT:    dbar 0
+; LA32-NEXT:    ll.w $a2, $a1, 0
+; LA32-NEXT:    xor $a3, $a2, $a0
+; LA32-NEXT:    sc.w $a3, $a1, 0
+; LA32-NEXT:    beq $a3, $zero, .LBB26_1
+; LA32-NEXT:  # %bb.2:
+; LA32-NEXT:    move $a0, $a2
+; LA32-NEXT:    ret
+;
+; LA64-LABEL: atomicrmw_xor_i32_acquire:
+; LA64:       # %bb.0:
+; LA64-NEXT:    amxor_db.w $a0, $a1, $a0
+; LA64-NEXT:    ret
+  %1 = atomicrmw xor ptr %a, i32 %b acquire
+  ret i32 %1
+}
+
+define i64 @atomicrmw_xor_i64_acquire(ptr %a, i64 %b) nounwind {
+; LA32-LABEL: atomicrmw_xor_i64_acquire:
+; LA32:       # %bb.0:
+; LA32-NEXT:    addi.w $sp, $sp, -16
+; LA32-NEXT:    st.w $ra, $sp, 12 # 4-byte Folded Spill
+; LA32-NEXT:    ori $a3, $zero, 2
+; LA32-NEXT:    bl %plt(__atomic_fetch_xor_8)
+; LA32-NEXT:    ld.w $ra, $sp, 12 # 4-byte Folded Reload
+; LA32-NEXT:    addi.w $sp, $sp, 16
+; LA32-NEXT:    ret
+;
+; LA64-LABEL: atomicrmw_xor_i64_acquire:
+; LA64:       # %bb.0:
+; LA64-NEXT:    amxor_db.d $a0, $a1, $a0
+; LA64-NEXT:    ret
+  %1 = atomicrmw xor ptr %a, i64 %b acquire
+  ret i64 %1
+}