unittests/ASM: Fix accidentally feleted file

This wasn't meant to be deleted.

unittests/ASM/Displacement_Encoding.asm

@@ -0,0 +1,41 @@
+%ifdef CONFIG
+{
+  "RegData": {
+    "RAX": "0x4142434445464748",
+    "RBX": "0x5152535455565758",
+    "RCX": "0x5152535455565758"
+  },
+
+  "MemoryRegions": {
+    "0x7FFFF000": "4096"
+  },
+
+  "MemoryData": {
+    "0x7FFFF000": "48 47 46 45 44 43 42 41"
+  }
+}
+%endif
+
+; Tests to ensure that 64-bit displacement encoding works correctly without being RIP relative.
+; x86-64 has two displacement encodings, one is RIP relative, one is 32-bit (signed) displacement only.
+; modrm.mod = 0b00 && modrm.rm = 0b101: Means no SIB, but address mode is RIP + disp32.
+; modrm.mod = 0b00 && modrm.rm = 0b100: Means SIB, but address mode is disp32.
+;  - if SIB.base = 0b101 && SIB.index = 0b100. Which means no registers for base and index.
+; Test disp32 by mapping a page at the limit of 2GB and read data from it. Also store and load.
+; If we were accidentally using RIP relative, then it would be 2GB + <low test base address>, which won't be mapped.
+
+; Test disp32 load.
+mov rax, [abs 0x7FFF_F000]
+
+mov rbx, 0x5152535455565758
+
+; LEA with disp32.
+lea rcx, [abs 0x7FFF_FFF8]
+
+; Test store with disp32 store.
+mov [abs 0x7FFF_FFF8], rbx
+
+; Load back with the LEA to ensure it's correct.
+mov rcx, [rcx]
+
+hlt