diff --git a/unittests/ASM/Includes/modrm_oob_macros.mac b/unittests/ASM/Includes/modrm_oob_macros.mac
new file mode 100644
index 000000000..fe1e0f5de
--- /dev/null
+++ b/unittests/ASM/Includes/modrm_oob_macros.mac
@@ -0,0 +1,51 @@
+%macro w2 2
+; Ensures that the load doesn't read past the end.
+%1 [r15 - %2]
+
+; Ensures the load doesn't read before the start.
+%1 [r14]
+%endmacro
+
+%macro w3 3
+; Ensures that the load doesn't read past the end.
+%1 [r15 - %2], %3
+
+; Ensures the load doesn't read before the start.
+%1 [r14], %3
+%endmacro
+
+%macro r3 3
+; Ensures that the load doesn't read past the end.
+%1 %3, [r15 - %2]
+
+; Ensures the load doesn't read before the start.
+%1 %3, [r14]
+%endmacro
+
+%macro rw3 3
+r3 %1, %2, %3
+w3 %1, %2, %3
+%endmacro
+
+%macro w4 4
+; Ensures that the load doesn't read past the end.
+%1 [r15 - %2], %3, %4
+
+; Ensures the load doesn't read before the start.
+%1 [r14], %3, %4
+%endmacro
+
+%macro r4 4
+; Ensures that the load doesn't read past the end.
+%1 %3, [r15 - %2], %4
+
+; Ensures the load doesn't read before the start.
+%1 %3, [r14], %4
+%endmacro
+
+%macro rw4 4
+r4 %1, %2, %3, %4
+w4 %1, %2, %3, %3
+%endmacro
+
+