diff --git a/backends/instructions_appendix/all_instructions.golden.adoc b/backends/instructions_appendix/all_instructions.golden.adoc
index d2678908b2..cddee7d88c 100644
--- a/backends/instructions_appendix/all_instructions.golden.adoc
+++ b/backends/instructions_appendix/all_instructions.golden.adoc
@@ -4853,6 +4853,138 @@ Included in::
 |===
 
 
+[#udb:doc:inst:c_ntl_all]
+== c.ntl.all
+
+Synopsis::
+Compressed non-temporal locality hint, all
+
+Encoding::
+[wavedrom, ,svg,subs='attributes',width="100%"]
+....
+{"reg":[{"bits":16,"name": 0x9016,"type":2}]}
+....
+
+Description::
+The C.NTL.ALL instruction indicates that the immediately subsequent instruction
+does not exhibit temporal locality within the capacity of any level of cache in
+the memory hierarchy. C.NTL.ALL is encoded as C.ADD x0, x5.
+
+
+Decode Variables::
+c.ntl.all has no decode variables.
+
+Included in::
+[options="autowrap,autowidth"]
+|===
+| Extension | Version
+
+| *Zca* | ~> 1.0.0
+
+| *Zihintntl* | ~> 1.0.0
+
+|===
+
+
+[#udb:doc:inst:c_ntl_p1]
+== c.ntl.p1
+
+Synopsis::
+Compressed non-temporal locality hint, innermost private
+
+Encoding::
+[wavedrom, ,svg,subs='attributes',width="100%"]
+....
+{"reg":[{"bits":16,"name": 0x900a,"type":2}]}
+....
+
+Description::
+The C.NTL.P1 instruction indicates that the immediately subsequent instruction
+does not exhibit temporal locality within the capacity of the innermost level
+of private cache in the memory hierarchy. C.NTL.P1 is encoded as C.ADD x0, x2.
+
+
+Decode Variables::
+c.ntl.p1 has no decode variables.
+
+Included in::
+[options="autowrap,autowidth"]
+|===
+| Extension | Version
+
+| *Zca* | ~> 1.0.0
+
+| *Zihintntl* | ~> 1.0.0
+
+|===
+
+
+[#udb:doc:inst:c_ntl_pall]
+== c.ntl.pall
+
+Synopsis::
+Compressed non-temporal locality hint, all private
+
+Encoding::
+[wavedrom, ,svg,subs='attributes',width="100%"]
+....
+{"reg":[{"bits":16,"name": 0x900e,"type":2}]}
+....
+
+Description::
+The C.NTL.PALL instruction indicates that the immediately subsequent instruction
+does not exhibit temporal locality within the capacity of any level of private
+cache in the memory hierarchy. C.NTL.PALL is encoded as C.ADD x0, x3.
+
+
+Decode Variables::
+c.ntl.pall has no decode variables.
+
+Included in::
+[options="autowrap,autowidth"]
+|===
+| Extension | Version
+
+| *Zca* | ~> 1.0.0
+
+| *Zihintntl* | ~> 1.0.0
+
+|===
+
+
+[#udb:doc:inst:c_ntl_s1]
+== c.ntl.s1
+
+Synopsis::
+Compressed non-temporal locality hint, innermost shared
+
+Encoding::
+[wavedrom, ,svg,subs='attributes',width="100%"]
+....
+{"reg":[{"bits":16,"name": 0x9012,"type":2}]}
+....
+
+Description::
+The C.NTL.S1 instruction indicates that the immediately subsequent instruction
+does not exhibit temporal locality within the capacity of the innermost level
+of shared cache in the memory hierarchy. C.NTL.S1 is encoded as C.ADD x0, x4.
+
+
+Decode Variables::
+c.ntl.s1 has no decode variables.
+
+Included in::
+[options="autowrap,autowidth"]
+|===
+| Extension | Version
+
+| *Zca* | ~> 1.0.0
+
+| *Zihintntl* | ~> 1.0.0
+
+|===
+
+
 [#udb:doc:inst:c_or]
 == c.or
 
@@ -16272,6 +16404,130 @@ Included in::
 |===
 
 
+[#udb:doc:inst:ntl_all]
+== ntl.all
+
+Synopsis::
+Non-temporal locality hint, all
+
+Encoding::
+[wavedrom, ,svg,subs='attributes',width="100%"]
+....
+{"reg":[{"bits":32,"name": 0x500033,"type":2}]}
+....
+
+Description::
+The NTL.ALL instruction indicates that the immediately subsequent instruction
+does not exhibit temporal locality within the capacity of any level of cache
+in the memory hierarchy. NTL.ALL is encoded as ADD x0, x0, x5.
+
+
+Decode Variables::
+ntl.all has no decode variables.
+
+Included in::
+[options="autowrap,autowidth"]
+|===
+| Extension | Version
+
+| *Zihintntl* | ~> 1.0.0
+
+|===
+
+
+[#udb:doc:inst:ntl_p1]
+== ntl.p1
+
+Synopsis::
+Non-temporal locality hint, innermost private
+
+Encoding::
+[wavedrom, ,svg,subs='attributes',width="100%"]
+....
+{"reg":[{"bits":32,"name": 0x200033,"type":2}]}
+....
+
+Description::
+The NTL.P1 instruction indicates that the immediately subsequent instruction
+does not exhibit temporal locality within the capacity of the innermost level
+of private cache in the memory hierarchy. NTL.P1 is encoded as ADD x0, x0, x2.
+
+
+Decode Variables::
+ntl.p1 has no decode variables.
+
+Included in::
+[options="autowrap,autowidth"]
+|===
+| Extension | Version
+
+| *Zihintntl* | ~> 1.0.0
+
+|===
+
+
+[#udb:doc:inst:ntl_pall]
+== ntl.pall
+
+Synopsis::
+Non-temporal locality hint, all private
+
+Encoding::
+[wavedrom, ,svg,subs='attributes',width="100%"]
+....
+{"reg":[{"bits":32,"name": 0x300033,"type":2}]}
+....
+
+Description::
+The NTL.PALL instruction indicates that the immediately subsequent instruction
+does not exhibit temporal locality within the capacity of any level of private
+cache in the memory hierarchy. NTL.PALL is encoded as ADD x0, x0, x3.
+
+
+Decode Variables::
+ntl.pall has no decode variables.
+
+Included in::
+[options="autowrap,autowidth"]
+|===
+| Extension | Version
+
+| *Zihintntl* | ~> 1.0.0
+
+|===
+
+
+[#udb:doc:inst:ntl_s1]
+== ntl.s1
+
+Synopsis::
+Non-temporal locality hint, innermost shared
+
+Encoding::
+[wavedrom, ,svg,subs='attributes',width="100%"]
+....
+{"reg":[{"bits":32,"name": 0x400033,"type":2}]}
+....
+
+Description::
+The NTL.S1 instruction indicates that the immediately subsequent instruction
+does not exhibit temporal locality within the capacity of the innermost level
+of shared cache in the memory hierarchy. NTL.S1 is encoded as ADD x0, x0, x4.
+
+
+Decode Variables::
+ntl.s1 has no decode variables.
+
+Included in::
+[options="autowrap,autowidth"]
+|===
+| Extension | Version
+
+| *Zihintntl* | ~> 1.0.0
+
+|===
+
+
 [#udb:doc:inst:or]
 == or
 
diff --git a/spec/std/isa/ext/Zihintntl.yaml b/spec/std/isa/ext/Zihintntl.yaml
index dd57172ed9..f350413a18 100644
--- a/spec/std/isa/ext/Zihintntl.yaml
+++ b/spec/std/isa/ext/Zihintntl.yaml
@@ -6,7 +6,7 @@
 $schema: "ext_schema.json#"
 kind: extension
 name: Zihintntl
-long_name: NTL (Non-Temporal Locality) Hint Instructions
+long_name: NTL Non-Temporal Locality Hint Instructions
 description: |
     The NTL instructions are HINTs that indicate that the explicit memory
     accesses of the immediately subsequent instruction (henceforth "target
diff --git a/spec/std/isa/inst/C/c.add.yaml b/spec/std/isa/inst/C/c.add.yaml
index dc73eb6465..f2029e1a62 100644
--- a/spec/std/isa/inst/C/c.add.yaml
+++ b/spec/std/isa/inst/C/c.add.yaml
@@ -29,6 +29,11 @@ access:
   u: always
   vs: always
   vu: always
+hints:
+  - { $ref: inst/Zihintntl/c.ntl.p1.yaml# }
+  - { $ref: inst/Zihintntl/c.ntl.pall.yaml# }
+  - { $ref: inst/Zihintntl/c.ntl.s1.yaml# }
+  - { $ref: inst/Zihintntl/c.ntl.all.yaml# }
 operation(): |
   XReg t0 = X[xd];
   XReg t1 = X[xs2];
diff --git a/spec/std/isa/inst/I/add.yaml b/spec/std/isa/inst/I/add.yaml
index 12bbd5ab91..6cb03d38cf 100644
--- a/spec/std/isa/inst/I/add.yaml
+++ b/spec/std/isa/inst/I/add.yaml
@@ -27,6 +27,11 @@ access:
   vs: always
   vu: always
 data_independent_timing: true
+hints:
+  - { $ref: inst/Zihintntl/ntl.p1.yaml# }
+  - { $ref: inst/Zihintntl/ntl.pall.yaml# }
+  - { $ref: inst/Zihintntl/ntl.s1.yaml# }
+  - { $ref: inst/Zihintntl/ntl.all.yaml# }
 operation(): X[xd] = X[xs1] + X[xs2];
 
 # SPDX-SnippetBegin
diff --git a/spec/std/isa/inst/Zihintntl/c.ntl.all.yaml b/spec/std/isa/inst/Zihintntl/c.ntl.all.yaml
new file mode 100644
index 0000000000..521c394078
--- /dev/null
+++ b/spec/std/isa/inst/Zihintntl/c.ntl.all.yaml
@@ -0,0 +1,26 @@
+# Copyright (c) Jordan Carlin
+# SPDX-License-Identifier: BSD-3-Clause-Clear
+
+# yaml-language-server: $schema=../../../../schemas/inst_schema.json
+
+$schema: inst_schema.json#
+kind: instruction
+name: c.ntl.all
+long_name: Compressed non-temporal locality hint, all
+description: |
+  The C.NTL.ALL instruction indicates that the immediately subsequent instruction
+  does not exhibit temporal locality within the capacity of any level of cache in
+  the memory hierarchy. C.NTL.ALL is encoded as C.ADD x0, x5.
+definedBy:
+  allOf:
+    - Zca
+    - Zihintntl
+assembly: ""
+encoding:
+  match: "1001000000010110"
+access:
+  s: always
+  u: always
+  vs: always
+  vu: always
+data_independent_timing: false
diff --git a/spec/std/isa/inst/Zihintntl/c.ntl.p1.yaml b/spec/std/isa/inst/Zihintntl/c.ntl.p1.yaml
new file mode 100644
index 0000000000..163c679313
--- /dev/null
+++ b/spec/std/isa/inst/Zihintntl/c.ntl.p1.yaml
@@ -0,0 +1,26 @@
+# Copyright (c) Jordan Carlin
+# SPDX-License-Identifier: BSD-3-Clause-Clear
+
+# yaml-language-server: $schema=../../../../schemas/inst_schema.json
+
+$schema: inst_schema.json#
+kind: instruction
+name: c.ntl.p1
+long_name: Compressed non-temporal locality hint, innermost private
+description: |
+  The C.NTL.P1 instruction indicates that the immediately subsequent instruction
+  does not exhibit temporal locality within the capacity of the innermost level
+  of private cache in the memory hierarchy. C.NTL.P1 is encoded as C.ADD x0, x2.
+definedBy:
+  allOf:
+    - Zca
+    - Zihintntl
+assembly: ""
+encoding:
+  match: "1001000000001010"
+access:
+  s: always
+  u: always
+  vs: always
+  vu: always
+data_independent_timing: false
diff --git a/spec/std/isa/inst/Zihintntl/c.ntl.pall.yaml b/spec/std/isa/inst/Zihintntl/c.ntl.pall.yaml
new file mode 100644
index 0000000000..459daa4148
--- /dev/null
+++ b/spec/std/isa/inst/Zihintntl/c.ntl.pall.yaml
@@ -0,0 +1,26 @@
+# Copyright (c) Jordan Carlin
+# SPDX-License-Identifier: BSD-3-Clause-Clear
+
+# yaml-language-server: $schema=../../../../schemas/inst_schema.json
+
+$schema: inst_schema.json#
+kind: instruction
+name: c.ntl.pall
+long_name: Compressed non-temporal locality hint, all private
+description: |
+  The C.NTL.PALL instruction indicates that the immediately subsequent instruction
+  does not exhibit temporal locality within the capacity of any level of private
+  cache in the memory hierarchy. C.NTL.PALL is encoded as C.ADD x0, x3.
+definedBy:
+  allOf:
+    - Zca
+    - Zihintntl
+assembly: ""
+encoding:
+  match: "1001000000001110"
+access:
+  s: always
+  u: always
+  vs: always
+  vu: always
+data_independent_timing: false
diff --git a/spec/std/isa/inst/Zihintntl/c.ntl.s1.yaml b/spec/std/isa/inst/Zihintntl/c.ntl.s1.yaml
new file mode 100644
index 0000000000..ecff447acd
--- /dev/null
+++ b/spec/std/isa/inst/Zihintntl/c.ntl.s1.yaml
@@ -0,0 +1,26 @@
+# Copyright (c) Jordan Carlin
+# SPDX-License-Identifier: BSD-3-Clause-Clear
+
+# yaml-language-server: $schema=../../../../schemas/inst_schema.json
+
+$schema: inst_schema.json#
+kind: instruction
+name: c.ntl.s1
+long_name: Compressed non-temporal locality hint, innermost shared
+description: |
+  The C.NTL.S1 instruction indicates that the immediately subsequent instruction
+  does not exhibit temporal locality within the capacity of the innermost level
+  of shared cache in the memory hierarchy. C.NTL.S1 is encoded as C.ADD x0, x4.
+definedBy:
+  allOf:
+    - Zca
+    - Zihintntl
+assembly: ""
+encoding:
+  match: "1001000000010010"
+access:
+  s: always
+  u: always
+  vs: always
+  vu: always
+data_independent_timing: false
diff --git a/spec/std/isa/inst/Zihintntl/ntl.all.yaml b/spec/std/isa/inst/Zihintntl/ntl.all.yaml
new file mode 100644
index 0000000000..56dc9ecb00
--- /dev/null
+++ b/spec/std/isa/inst/Zihintntl/ntl.all.yaml
@@ -0,0 +1,23 @@
+# Copyright (c) Jordan Carlin
+# SPDX-License-Identifier: BSD-3-Clause-Clear
+
+# yaml-language-server: $schema=../../../../schemas/inst_schema.json
+
+$schema: inst_schema.json#
+kind: instruction
+name: ntl.all
+long_name: Non-temporal locality hint, all
+description: |
+  The NTL.ALL instruction indicates that the immediately subsequent instruction
+  does not exhibit temporal locality within the capacity of any level of cache
+  in the memory hierarchy. NTL.ALL is encoded as ADD x0, x0, x5.
+definedBy: Zihintntl
+assembly: ""
+encoding:
+  match: "00000000010100000000000000110011"
+access:
+  s: always
+  u: always
+  vs: always
+  vu: always
+data_independent_timing: false
diff --git a/spec/std/isa/inst/Zihintntl/ntl.p1.yaml b/spec/std/isa/inst/Zihintntl/ntl.p1.yaml
new file mode 100644
index 0000000000..d53b28fcc6
--- /dev/null
+++ b/spec/std/isa/inst/Zihintntl/ntl.p1.yaml
@@ -0,0 +1,23 @@
+# Copyright (c) Jordan Carlin
+# SPDX-License-Identifier: BSD-3-Clause-Clear
+
+# yaml-language-server: $schema=../../../../schemas/inst_schema.json
+
+$schema: inst_schema.json#
+kind: instruction
+name: ntl.p1
+long_name: Non-temporal locality hint, innermost private
+description: |
+  The NTL.P1 instruction indicates that the immediately subsequent instruction
+  does not exhibit temporal locality within the capacity of the innermost level
+  of private cache in the memory hierarchy. NTL.P1 is encoded as ADD x0, x0, x2.
+definedBy: Zihintntl
+assembly: ""
+encoding:
+  match: "00000000001000000000000000110011"
+access:
+  s: always
+  u: always
+  vs: always
+  vu: always
+data_independent_timing: false
diff --git a/spec/std/isa/inst/Zihintntl/ntl.pall.yaml b/spec/std/isa/inst/Zihintntl/ntl.pall.yaml
new file mode 100644
index 0000000000..d3c26c640d
--- /dev/null
+++ b/spec/std/isa/inst/Zihintntl/ntl.pall.yaml
@@ -0,0 +1,23 @@
+# Copyright (c) Jordan Carlin
+# SPDX-License-Identifier: BSD-3-Clause-Clear
+
+# yaml-language-server: $schema=../../../../schemas/inst_schema.json
+
+$schema: inst_schema.json#
+kind: instruction
+name: ntl.pall
+long_name: Non-temporal locality hint, all private
+description: |
+  The NTL.PALL instruction indicates that the immediately subsequent instruction
+  does not exhibit temporal locality within the capacity of any level of private
+  cache in the memory hierarchy. NTL.PALL is encoded as ADD x0, x0, x3.
+definedBy: Zihintntl
+assembly: ""
+encoding:
+  match: "00000000001100000000000000110011"
+access:
+  s: always
+  u: always
+  vs: always
+  vu: always
+data_independent_timing: false
diff --git a/spec/std/isa/inst/Zihintntl/ntl.s1.yaml b/spec/std/isa/inst/Zihintntl/ntl.s1.yaml
new file mode 100644
index 0000000000..9eaca11104
--- /dev/null
+++ b/spec/std/isa/inst/Zihintntl/ntl.s1.yaml
@@ -0,0 +1,23 @@
+# Copyright (c) Jordan Carlin
+# SPDX-License-Identifier: BSD-3-Clause-Clear
+
+# yaml-language-server: $schema=../../../../schemas/inst_schema.json
+
+$schema: inst_schema.json#
+kind: instruction
+name: ntl.s1
+long_name: Non-temporal locality hint, innermost shared
+description: |
+  The NTL.S1 instruction indicates that the immediately subsequent instruction
+  does not exhibit temporal locality within the capacity of the innermost level
+  of shared cache in the memory hierarchy. NTL.S1 is encoded as ADD x0, x0, x4.
+definedBy: Zihintntl
+assembly: ""
+encoding:
+  match: "00000000010000000000000000110011"
+access:
+  s: always
+  u: always
+  vs: always
+  vu: always
+data_independent_timing: false