diff --git a/llvm/lib/Target/RISCV/RISCVInstrInfo.td b/llvm/lib/Target/RISCV/RISCVInstrInfo.td
--- a/llvm/lib/Target/RISCV/RISCVInstrInfo.td
+++ b/llvm/lib/Target/RISCV/RISCVInstrInfo.td
@@ -450,20 +450,35 @@
   let isTerminator = 1;
 }
 
-let hasSideEffects = 0, mayLoad = 1, mayStore = 0 in
+let hasSideEffects = 0, mayLoad = 1, mayStore = 0 in {
 class Load_ri<bits<3> funct3, string opcodestr>
     : RVInstI<funct3, OPC_LOAD, (outs GPR:$rd), (ins GPR:$rs1, simm12:$imm12),
               opcodestr, "$rd, ${imm12}(${rs1})">;
 
+class HLoad_r<bits<7> funct7, bits<5> funct5, string opcodestr>
+    : RVInstR<funct7, 0b100, OPC_SYSTEM, (outs GPR:$rd),
+              (ins GPRMemZeroOffset:$rs1), opcodestr, "$rd, $rs1"> {
+  let rs2 = funct5;
+}
+}
+
 // Operands for stores are in the order srcreg, base, offset rather than
 // reflecting the order these fields are specified in the instruction
 // encoding.
-let hasSideEffects = 0, mayLoad = 0, mayStore = 1 in
+let hasSideEffects = 0, mayLoad = 0, mayStore = 1 in {
 class Store_rri<bits<3> funct3, string opcodestr>
     : RVInstS<funct3, OPC_STORE, (outs),
               (ins GPR:$rs2, GPR:$rs1, simm12:$imm12),
               opcodestr, "$rs2, ${imm12}(${rs1})">;
 
+class HStore_rr<bits<7> funct7, string opcodestr>
+    : RVInstR<funct7, 0b100, OPC_SYSTEM, (outs),
+              (ins GPR:$rs2, GPRMemZeroOffset:$rs1),
+               opcodestr, "$rs2, $rs1"> {
+  let rd = 0;
+}
+}
+
 let hasSideEffects = 0, mayLoad = 0, mayStore = 0 in
 class ALU_ri<bits<3> funct3, string opcodestr>
     : RVInstI<funct3, OPC_OP_IMM, (outs GPR:$rd), (ins GPR:$rs1, simm12:$imm12),
@@ -723,6 +738,23 @@
 def HINVAL_VVMA : Priv_rr<"hinval.vvma", 0b0010011>, Sched<[]>;
 def HINVAL_GVMA : Priv_rr<"hinval.gvma", 0b0110011>, Sched<[]>;
 
+def HLV_B   : HLoad_r<0b0110000, 0b00000, "hlv.b">, Sched<[]>;
+def HLV_BU  : HLoad_r<0b0110000, 0b00001, "hlv.bu">, Sched<[]>;
+def HLV_H   : HLoad_r<0b0110010, 0b00000, "hlv.h">, Sched<[]>;
+def HLV_HU  : HLoad_r<0b0110010, 0b00001, "hlv.hu">, Sched<[]>;
+def HLVX_HU : HLoad_r<0b0110010, 0b00011, "hlvx.hu">, Sched<[]>;
+def HLV_W   : HLoad_r<0b0110100, 0b00000, "hlv.w">, Sched<[]>;
+def HLVX_WU : HLoad_r<0b0110100, 0b00011, "hlvx.wu">, Sched<[]>;
+def HSV_B   : HStore_rr<0b0110001, "hsv.b">, Sched<[]>;
+def HSV_H   : HStore_rr<0b0110011, "hsv.h">, Sched<[]>;
+def HSV_W   : HStore_rr<0b0110101, "hsv.w">, Sched<[]>;
+
+let Predicates = [IsRV64] in {
+def HLV_WU  : HLoad_r<0b0110100, 0b00001, "hlv.wu">, Sched<[]>;
+def HLV_D   : HLoad_r<0b0110110, 0b00000, "hlv.d">, Sched<[]>;
+def HSV_D   : HStore_rr<0b0110111, "hsv.d">, Sched<[]>;
+}
+
 //===----------------------------------------------------------------------===//
 // Debug instructions
 //===----------------------------------------------------------------------===//
diff --git a/llvm/test/MC/RISCV/priv-aliases-valid.s b/llvm/test/MC/RISCV/priv-aliases-valid.s
new file mode 100644
--- /dev/null
+++ b/llvm/test/MC/RISCV/priv-aliases-valid.s
@@ -0,0 +1,50 @@
+# RUN: llvm-mc %s -triple=riscv32 -riscv-no-aliases -show-encoding \
+# RUN:     | FileCheck -check-prefixes=CHECK,CHECK-INST %s
+# RUN: llvm-mc %s -triple=riscv64 -riscv-no-aliases -show-encoding \
+# RUN:     | FileCheck -check-prefixes=CHECK,CHECK-INST %s
+# RUN: llvm-mc -filetype=obj -triple riscv32 < %s \
+# RUN:     | llvm-objdump -M no-aliases -d - \
+# RUN:     | FileCheck -check-prefix=CHECK-INST %s
+# RUN: llvm-mc -filetype=obj -triple riscv64 < %s \
+# RUN:     | llvm-objdump -M no-aliases -d - \
+# RUN:     | FileCheck -check-prefix=CHECK-INST %s
+
+# CHECK-INST: hlv.b a0, (a1)
+# CHECK: encoding: [0x73,0xc5,0x05,0x60]
+hlv.b   a0, 0(a1)
+
+# CHECK-INST: hlv.bu a0, (a1)
+# CHECK: encoding: [0x73,0xc5,0x15,0x60]
+hlv.bu  a0, 0(a1)
+
+# CHECK-INST: hlv.h a1, (a2)
+# CHECK: encoding: [0xf3,0x45,0x06,0x64]
+hlv.h   a1, 0(a2)
+
+# CHECK-INST: hlv.hu a1, (a1)
+# CHECK: encoding: [0xf3,0xc5,0x15,0x64]
+hlv.hu  a1, 0(a1)
+
+# CHECK-INST: hlvx.hu a1, (a2)
+# CHECK: encoding: [0xf3,0x45,0x36,0x64]
+hlvx.hu a1, 0(a2)
+
+# CHECK-INST: hlv.w a2, (a2)
+# CHECK: encoding: [0x73,0x46,0x06,0x68]
+hlv.w   a2, 0(a2)
+
+# CHECK-INST: hlvx.wu a2, (a3)
+# CHECK: encoding: [0x73,0xc6,0x36,0x68]
+hlvx.wu a2, 0(a3)
+
+# CHECK-INST: hsv.b a0, (a1)
+# CHECK: encoding: [0x73,0xc0,0xa5,0x62]
+hsv.b   a0, 0(a1)
+
+# CHECK-INST: hsv.h a0, (a1)
+# CHECK: encoding: [0x73,0xc0,0xa5,0x66]
+hsv.h   a0, 0(a1)
+
+# CHECK-INST: hsv.w a0, (a1)
+# CHECK: encoding: [0x73,0xc0,0xa5,0x6a]
+hsv.w   a0, 0(a1)
diff --git a/llvm/test/MC/RISCV/priv-invalid.s b/llvm/test/MC/RISCV/priv-invalid.s
--- a/llvm/test/MC/RISCV/priv-invalid.s
+++ b/llvm/test/MC/RISCV/priv-invalid.s
@@ -29,3 +29,63 @@
 hinval.gvma zero, a1, a2 # CHECK: :[[@LINE]]:23: error: invalid operand for instruction
 
 hinval.gvma a0, 0x10 # CHECK: :[[@LINE]]:17: error: invalid operand for instruction
+
+hlv.b a0, 0x10 # CHECK: :[[@LINE]]:16: error: expected '(' after optional integer offset
+
+hlv.b a0, a1 # CHECK: :[[@LINE]]:11: error: expected '(' or optional integer offset
+
+hlv.b a0, 1(a1) # CHECK: :[[@LINE]]:11: error: optional integer offset must be 0
+
+hlv.bu a0, 0x10 # CHECK: :[[@LINE]]:17: error: expected '(' after optional integer offset
+
+hlv.bu a0, a1 # CHECK: :[[@LINE]]:12: error: expected '(' or optional integer offset
+
+hlv.bu a0, 1(a1) # CHECK: :[[@LINE]]:12: error: optional integer offset must be 0
+
+hlv.h a0, 0x10 # CHECK: :[[@LINE]]:16: error: expected '(' after optional integer offset
+
+hlv.h a0, a1 # CHECK: :[[@LINE]]:11: error: expected '(' or optional integer offset
+
+hlv.h a0, 1(a1) # CHECK: :[[@LINE]]:11: error: optional integer offset must be 0
+
+hlv.hu a0, 0x10 # CHECK: :[[@LINE]]:17: error: expected '(' after optional integer offset
+
+hlv.hu a0, a1 # CHECK: :[[@LINE]]:12: error: expected '(' or optional integer offset
+
+hlv.hu a0, 1(a1) # CHECK: :[[@LINE]]:12: error: optional integer offset must be 0
+
+hlvx.hu a0, 0x10 # CHECK: :[[@LINE]]:18: error: expected '(' after optional integer offset
+    
+hlvx.hu a0, a1 # CHECK: :[[@LINE]]:13: error: expected '(' or optional integer offset
+    
+hlvx.hu a0, 1(a1) # CHECK: :[[@LINE]]:13: error: optional integer offset must be 0
+
+hlv.w a0, 0x10 # CHECK: :[[@LINE]]:16: error: expected '(' after optional integer offset
+
+hlv.w a0, a1 # CHECK: :[[@LINE]]:11: error: expected '(' or optional integer offset
+
+hlv.w a0, 1(a1) # CHECK: :[[@LINE]]:11: error: optional integer offset must be 0
+
+hlvx.wu a0, 0x10 # CHECK: :[[@LINE]]:18: error: expected '(' after optional integer offset
+
+hlvx.wu a0, a1 # CHECK: :[[@LINE]]:13: error: expected '(' or optional integer offset
+
+hlvx.wu a0, 1(a1) # CHECK: :[[@LINE]]:13: error: optional integer offset must be 0
+
+hsv.b a0, 0x10 # CHECK: :[[@LINE]]:16: error: expected '(' after optional integer offset
+
+hsv.b a0, a1 # CHECK: :[[@LINE]]:11: error: expected '(' or optional integer offset
+
+hsv.b a0, 1(a1) # CHECK: :[[@LINE]]:11: error: optional integer offset must be 0
+
+hsv.h a0, 0x10 # CHECK: :[[@LINE]]:16: error: expected '(' after optional integer offset
+
+hsv.h a0, a1 # CHECK: :[[@LINE]]:11: error: expected '(' or optional integer offset
+
+hsv.h a0, 1(a1) # CHECK: :[[@LINE]]:11: error: optional integer offset must be 0
+
+hsv.w a0, 0x10 # CHECK: :[[@LINE]]:16: error: expected '(' after optional integer offset
+
+hsv.w a0, a1 # CHECK: :[[@LINE]]:11: error: expected '(' or optional integer offset
+
+hsv.w a0, 1(a1) # CHECK: :[[@LINE]]:11: error: optional integer offset must be 0
diff --git a/llvm/test/MC/RISCV/priv-rv64-invalid.s b/llvm/test/MC/RISCV/priv-rv64-invalid.s
new file mode 100644
--- /dev/null
+++ b/llvm/test/MC/RISCV/priv-rv64-invalid.s
@@ -0,0 +1,19 @@
+# RUN: not llvm-mc -triple riscv64 < %s 2>&1 | FileCheck %s
+
+hlv.wu a0, 0x10 # CHECK: :[[@LINE]]:17: error: expected '(' after optional integer offset
+
+hlv.wu a0, a1 # CHECK: :[[@LINE]]:12: error: expected '(' or optional integer offset
+
+hlv.wu a0, 1(a1) # CHECK: :[[@LINE]]:12: error: optional integer offset must be 0
+
+hlv.d a0, 0x10 # CHECK: :[[@LINE]]:16: error: expected '(' after optional integer offset
+
+hlv.d a0, a1 # CHECK: :[[@LINE]]:11: error: expected '(' or optional integer offset
+
+hlv.d a0, 1(a1) # CHECK: :[[@LINE]]:11: error: optional integer offset must be 0
+
+hsv.d a0, 0x10 # CHECK: :[[@LINE]]:16: error: expected '(' after optional integer offset
+
+hsv.d a0, a1 # CHECK: :[[@LINE]]:11: error: expected '(' or optional integer offset
+
+hsv.d a0, 1(a1) # CHECK: :[[@LINE]]:11: error: optional integer offset must be 0
diff --git a/llvm/test/MC/RISCV/priv-rv64-valid.s b/llvm/test/MC/RISCV/priv-rv64-valid.s
new file mode 100644
--- /dev/null
+++ b/llvm/test/MC/RISCV/priv-rv64-valid.s
@@ -0,0 +1,38 @@
+# RUN: llvm-mc %s -triple=riscv64 -riscv-no-aliases -show-encoding \
+# RUN:     | FileCheck -check-prefixes=CHECK,CHECK-INST %s
+# RUN: llvm-mc -filetype=obj -triple riscv64 < %s \
+# RUN:     | llvm-objdump -M no-aliases -d - \
+# RUN:     | FileCheck -check-prefix=CHECK-INST %s
+
+# RUN: not llvm-mc -triple riscv32 < %s 2>&1 \
+# RUN:     | FileCheck -check-prefix=CHECK-RV32 %s
+
+# CHECK-INST: hlv.wu a0, (a1)
+# CHECK: encoding: [0x73,0xc5,0x15,0x68]
+# CHECK-RV32: :[[@LINE+1]]:1: error: instruction requires the following: RV64I Base Instruction Set
+hlv.wu   a0, (a1)
+
+# CHECK-INST: hlv.wu a0, (a1)
+# CHECK: encoding: [0x73,0xc5,0x15,0x68]
+# CHECK-RV32: :[[@LINE+1]]:1: error: instruction requires the following: RV64I Base Instruction Set
+hlv.wu   a0, 0(a1)
+
+# CHECK-INST: hlv.d a0, (a1)
+# CHECK: encoding: [0x73,0xc5,0x05,0x6c]
+# CHECK-RV32: :[[@LINE+1]]:1: error: instruction requires the following: RV64I Base Instruction Set
+hlv.d  a0, (a1)
+
+# CHECK-INST: hlv.d a0, (a1)
+# CHECK: encoding: [0x73,0xc5,0x05,0x6c]
+# CHECK-RV32: :[[@LINE+1]]:1: error: instruction requires the following: RV64I Base Instruction Set
+hlv.d  a0, 0(a1)
+
+# CHECK-INST: hsv.d a0, (a1)
+# CHECK: encoding: [0x73,0xc0,0xa5,0x6e]
+# CHECK-RV32: :[[@LINE+1]]:1: error: instruction requires the following: RV64I Base Instruction Set
+hsv.d   a0, (a1)
+
+# CHECK-INST: hsv.d a0, (a1)
+# CHECK: encoding: [0x73,0xc0,0xa5,0x6e]
+# CHECK-RV32: :[[@LINE+1]]:1: error: instruction requires the following: RV64I Base Instruction Set
+hsv.d   a0, 0(a1)
diff --git a/llvm/test/MC/RISCV/priv-valid.s b/llvm/test/MC/RISCV/priv-valid.s
--- a/llvm/test/MC/RISCV/priv-valid.s
+++ b/llvm/test/MC/RISCV/priv-valid.s
@@ -80,3 +80,43 @@
 # CHECK-INST: hinval.gvma a0, a1
 # CHECK: encoding: [0x73,0x00,0xb5,0x66]
 hinval.gvma a0, a1
+
+# CHECK-INST: hlv.b a0, (a1)
+# CHECK: encoding: [0x73,0xc5,0x05,0x60]
+hlv.b   a0, (a1)
+
+# CHECK-INST: hlv.bu a0, (a1)
+# CHECK: encoding: [0x73,0xc5,0x15,0x60]
+hlv.bu  a0, (a1)
+
+# CHECK-INST: hlv.h a1, (a2)
+# CHECK: encoding: [0xf3,0x45,0x06,0x64]
+hlv.h   a1, (a2)
+
+# CHECK-INST: hlv.hu a1, (a1)
+# CHECK: encoding: [0xf3,0xc5,0x15,0x64]
+hlv.hu  a1, (a1)
+
+# CHECK-INST: hlvx.hu a1, (a2)
+# CHECK: encoding: [0xf3,0x45,0x36,0x64]
+hlvx.hu a1, (a2)
+
+# CHECK-INST: hlv.w a2, (a2)
+# CHECK: encoding: [0x73,0x46,0x06,0x68]
+hlv.w   a2, (a2)
+
+# CHECK-INST: hlvx.wu a2, (a3)
+# CHECK: encoding: [0x73,0xc6,0x36,0x68]
+hlvx.wu a2, (a3)
+
+# CHECK-INST: hsv.b a0, (a1)
+# CHECK: encoding: [0x73,0xc0,0xa5,0x62]
+hsv.b   a0, (a1)
+
+# CHECK-INST: hsv.h a0, (a1)
+# CHECK: encoding: [0x73,0xc0,0xa5,0x66]
+hsv.h   a0, (a1)
+
+# CHECK-INST: hsv.w a0, (a1)
+# CHECK: encoding: [0x73,0xc0,0xa5,0x6a]
+hsv.w   a0, (a1)