diff --git a/llvm/lib/Support/RISCVISAInfo.cpp b/llvm/lib/Support/RISCVISAInfo.cpp
--- a/llvm/lib/Support/RISCVISAInfo.cpp
+++ b/llvm/lib/Support/RISCVISAInfo.cpp
@@ -98,6 +98,8 @@
 };
 
 static const RISCVSupportedExtension SupportedExperimentalExtensions[] = {
+    {"zihintntl", RISCVExtensionVersion{0, 2}},
+
     {"zbe", RISCVExtensionVersion{0, 93}},
     {"zbf", RISCVExtensionVersion{0, 93}},
     {"zbm", RISCVExtensionVersion{0, 93}},
diff --git a/llvm/lib/Target/RISCV/RISCV.td b/llvm/lib/Target/RISCV/RISCV.td
--- a/llvm/lib/Target/RISCV/RISCV.td
+++ b/llvm/lib/Target/RISCV/RISCV.td
@@ -48,6 +48,13 @@
                                      AssemblerPredicate<(all_of FeatureStdExtZihintpause),
                                      "'Zihintpause' (Pause Hint)">;
 
+def FeatureStdExtZihintntl
+    : SubtargetFeature<"experimental-zihintntl", "HasStdExtZihintntl", "true",
+                       "'zihintntl' (Non-Temporal Locality Hints)">;
+def HasStdExtZihintntl : Predicate<"Subtarget->hasStdExtZihintntl()">,
+                                    AssemblerPredicate<(all_of FeatureStdExtZihintntl),
+                                    "'Zihintntl' (Non-Temporal Locality Hints)">;
+
 def FeatureStdExtZfhmin
     : SubtargetFeature<"zfhmin", "HasStdExtZfhmin", "true",
                        "'Zfhmin' (Half-Precision Floating-Point Minimal)",
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
@@ -904,6 +904,13 @@
 def : InstAlias<"hfence.vvma",     (HFENCE_VVMA      X0, X0)>;
 def : InstAlias<"hfence.vvma $rs", (HFENCE_VVMA GPR:$rs, X0)>;
 
+let Predicates = [HasStdExtZihintntl] in {
+  def : InstAlias<"ntl.p1",     (ADD   X0, X0, X2)>;
+  def : InstAlias<"ntl.pall",   (ADD   X0, X0, X3)>;
+  def : InstAlias<"ntl.s1",     (ADD   X0, X0, X4)>;
+  def : InstAlias<"ntl.all",    (ADD   X0, X0, X5)>;
+} // Predicates = [HasStdExtZihintntl]
+
 let EmitPriority = 0 in {
 def : InstAlias<"lb $rd, (${rs1})",
                 (LB  GPR:$rd, GPR:$rs1, 0)>;
diff --git a/llvm/lib/Target/RISCV/RISCVSubtarget.h b/llvm/lib/Target/RISCV/RISCVSubtarget.h
--- a/llvm/lib/Target/RISCV/RISCVSubtarget.h
+++ b/llvm/lib/Target/RISCV/RISCVSubtarget.h
@@ -66,6 +66,7 @@
   bool HasStdExtD = false;
   bool HasStdExtC = false;
   bool HasStdExtZihintpause = false;
+  bool HasStdExtZihintntl = false;
   bool HasStdExtZba = false;
   bool HasStdExtZbb = false;
   bool HasStdExtZbc = false;
@@ -163,6 +164,7 @@
   bool hasStdExtC() const { return HasStdExtC; }
   bool hasStdExtV() const { return HasStdExtV; }
   bool hasStdExtZihintpause() const { return HasStdExtZihintpause; }
+  bool hasStdExtZihintntl() const { return HasStdExtZihintntl; }
   bool hasStdExtZba() const { return HasStdExtZba; }
   bool hasStdExtZbb() const { return HasStdExtZbb; }
   bool hasStdExtZbc() const { return HasStdExtZbc; }
diff --git a/llvm/test/CodeGen/RISCV/attributes.ll b/llvm/test/CodeGen/RISCV/attributes.ll
--- a/llvm/test/CodeGen/RISCV/attributes.ll
+++ b/llvm/test/CodeGen/RISCV/attributes.ll
@@ -6,6 +6,7 @@
 ; RUN: llc -mtriple=riscv32 -mattr=+d %s -o - | FileCheck --check-prefix=RV32D %s
 ; RUN: llc -mtriple=riscv32 -mattr=+c %s -o - | FileCheck --check-prefix=RV32C %s
 ; RUN: llc -mtriple=riscv32 -mattr=+zihintpause %s -o - | FileCheck --check-prefix=RV32ZIHINTPAUSE %s
+; RUN: llc -mtriple=riscv32 -mattr=+experimental-zihintntl %s -o - | FileCheck --check-prefix=RV32ZIHINTNTL %s
 ; RUN: llc -mtriple=riscv32 -mattr=+zfhmin %s -o - | FileCheck --check-prefix=RV32ZFHMIN %s
 ; RUN: llc -mtriple=riscv32 -mattr=+zfh %s -o - | FileCheck --check-prefix=RV32ZFH %s
 ; RUN: llc -mtriple=riscv32 -mattr=+zba %s -o - | FileCheck --check-prefix=RV32ZBA %s
@@ -42,6 +43,7 @@
 ; RUN: llc -mtriple=riscv64 -mattr=+d %s -o - | FileCheck --check-prefix=RV64D %s
 ; RUN: llc -mtriple=riscv64 -mattr=+c %s -o - | FileCheck --check-prefix=RV64C %s
 ; RUN: llc -mtriple=riscv64 -mattr=+zihintpause %s -o - | FileCheck --check-prefix=RV64ZIHINTPAUSE %s
+; RUN: llc -mtriple=riscv64 -mattr=+experimental-zihintntl %s -o - | FileCheck --check-prefix=RV64ZIHINTNTL %s
 ; RUN: llc -mtriple=riscv64 -mattr=+zfhmin %s -o - | FileCheck --check-prefix=RV64ZFHMIN %s
 ; RUN: llc -mtriple=riscv64 -mattr=+zfh %s -o - | FileCheck --check-prefix=RV64ZFH %s
 ; RUN: llc -mtriple=riscv64 -mattr=+zba %s -o - | FileCheck --check-prefix=RV64ZBA %s
@@ -79,6 +81,7 @@
 ; RV32D: .attribute 5, "rv32i2p0_f2p0_d2p0"
 ; RV32C: .attribute 5, "rv32i2p0_c2p0"
 ; RV32ZIHINTPAUSE: .attribute 5, "rv32i2p0_zihintpause2p0"
+; RV32ZIHINTNTL: .attribute 5, "rv32i2p0_zihintntl0p2"
 ; RV32ZFHMIN: .attribute 5, "rv32i2p0_f2p0_zfhmin1p0"
 ; RV32ZFH: .attribute 5, "rv32i2p0_f2p0_zfh1p0"
 ; RV32ZBA: .attribute 5, "rv32i2p0_zba1p0"
@@ -116,6 +119,7 @@
 ; RV64D: .attribute 5, "rv64i2p0_f2p0_d2p0"
 ; RV64C: .attribute 5, "rv64i2p0_c2p0"
 ; RV64ZIHINTPAUSE: .attribute 5, "rv64i2p0_zihintpause2p0"
+; RV64ZIHINTNTL: .attribute 5, "rv64i2p0_zihintntl0p2"
 ; RV64ZFHMIN: .attribute 5, "rv64i2p0_f2p0_zfhmin1p0"
 ; RV64ZFH: .attribute 5, "rv64i2p0_f2p0_zfh1p0"
 ; RV64ZBA: .attribute 5, "rv64i2p0_zba1p0"
diff --git a/llvm/test/MC/RISCV/rv32zihintntl-valid.s b/llvm/test/MC/RISCV/rv32zihintntl-valid.s
new file mode 100644
--- /dev/null
+++ b/llvm/test/MC/RISCV/rv32zihintntl-valid.s
@@ -0,0 +1,26 @@
+# RUN: llvm-mc %s -triple=riscv32 -mattr=+experimental-zihintntl -riscv-no-aliases -show-encoding \
+# RUN:     | FileCheck -check-prefixes=CHECK-ASM,CHECK-ASM-AND-OBJ %s
+# RUN: llvm-mc %s -triple=riscv64 -mattr=+experimental-zihintntl -riscv-no-aliases -show-encoding \
+# RUN:     | FileCheck -check-prefixes=CHECK-ASM,CHECK-ASM-AND-OBJ %s
+# RUN: llvm-mc -filetype=obj -triple=riscv32 -mattr=+experimental-zihintntl < %s \
+# RUN:     | llvm-objdump --mattr=+experimental-zihintntl -M no-aliases -d -r - \
+# RUN:     | FileCheck --check-prefix=CHECK-ASM-AND-OBJ %s
+# RUN: llvm-mc -filetype=obj -triple=riscv64 -mattr=+experimental-zihintntl < %s \
+# RUN:     | llvm-objdump --mattr=+experimental-zihintntl -M no-aliases -d -r - \
+# RUN:     | FileCheck --check-prefix=CHECK-ASM-AND-OBJ %s
+
+# CHECK-ASM-AND-OBJ: add zero, zero, sp
+# CHECK-ASM: encoding: [0x33,0x00,0x20,0x00]
+ntl.p1
+
+# CHECK-ASM-AND-OBJ: add zero, zero, gp
+# CHECK-ASM: encoding: [0x33,0x00,0x30,0x00]
+ntl.pall
+
+# CHECK-ASM-AND-OBJ: add zero, zero, tp
+# CHECK-ASM: encoding: [0x33,0x00,0x40,0x00]
+ntl.s1
+
+# CHECK-ASM-AND-OBJ: add zero, zero, t0
+# CHECK-ASM: encoding: [0x33,0x00,0x50,0x00]
+ntl.all