diff --git a/src/.gitignore b/src/.gitignore
index 23854d3..ee7d724 100644
--- a/src/.gitignore
+++ b/src/.gitignore
@@ -1,3 +1,2 @@
 a.out
 a.mcfunction
-mcasm
diff --git a/src/DataPack/mc-asm/data/mcasm/functions/add.mcfunction b/src/DataPack/mc-asm/data/mcasm/functions/add.mcfunction
new file mode 100644
index 0000000..419555f
--- /dev/null
+++ b/src/DataPack/mc-asm/data/mcasm/functions/add.mcfunction
@@ -0,0 +1,6 @@
+# add.mcfunction
+# __arg1 integer A
+# __arg2 integer B
+# returns A + B
+scoreboard players operation __ret Internal = __arg1 Internal
+scoreboard players operation __ret Internal += __arg2 Internal
\ No newline at end of file
diff --git a/src/DataPack/mc-asm/data/mcasm/functions/ass.mcfunction b/src/DataPack/mc-asm/data/mcasm/functions/ass.mcfunction
new file mode 100644
index 0000000..0a19486
--- /dev/null
+++ b/src/DataPack/mc-asm/data/mcasm/functions/ass.mcfunction
@@ -0,0 +1,6 @@
+# ass.mcfunction
+# __arg1 integer A
+# returns A
+#
+# this function exists for generalization in the complier.
+scoreboard players operation __ret Internal = __arg1 Internal
\ No newline at end of file
diff --git a/src/DataPack/mc-asm/data/mcasm/functions/div.mcfunction b/src/DataPack/mc-asm/data/mcasm/functions/div.mcfunction
new file mode 100644
index 0000000..aa268b3
--- /dev/null
+++ b/src/DataPack/mc-asm/data/mcasm/functions/div.mcfunction
@@ -0,0 +1,6 @@
+# div.mcfunction
+# __arg1 integer A
+# __arg2 integer B
+# returns A / B
+scoreboard players operation __ret Internal = __arg1 Internal
+scoreboard players operation __ret Internal /= __arg2 Internal
\ No newline at end of file
diff --git a/src/DataPack/mc-asm/data/mcasm/functions/eq.mcfunction b/src/DataPack/mc-asm/data/mcasm/functions/eq.mcfunction
new file mode 100644
index 0000000..05dfe4f
--- /dev/null
+++ b/src/DataPack/mc-asm/data/mcasm/functions/eq.mcfunction
@@ -0,0 +1,6 @@
+# eq.mcfunction
+# __arg1 integer A
+# __arg2 integer B
+# returns A == B
+scoreboard players set __ret Internal 0
+execute if score __arg1 Internal = __arg2 Internal run scoreboard players set __ret Internal 1
diff --git a/src/DataPack/mc-asm/data/mcasm/functions/ge.mcfunction b/src/DataPack/mc-asm/data/mcasm/functions/ge.mcfunction
new file mode 100644
index 0000000..92751ff
--- /dev/null
+++ b/src/DataPack/mc-asm/data/mcasm/functions/ge.mcfunction
@@ -0,0 +1,6 @@
+# ge.mcfunction
+# __arg1 integer A
+# __arg2 integer B
+# returns A >= B
+scoreboard players set __ret Internal 0
+execute if score __arg1 Internal >= __arg2 Internal run scoreboard players set __ret Internal 1
diff --git a/src/DataPack/mc-asm/data/mcasm/functions/gt.mcfunction b/src/DataPack/mc-asm/data/mcasm/functions/gt.mcfunction
new file mode 100644
index 0000000..7f3f190
--- /dev/null
+++ b/src/DataPack/mc-asm/data/mcasm/functions/gt.mcfunction
@@ -0,0 +1,6 @@
+# gt.mcfunction
+# __arg1 integer A
+# __arg2 integer B
+# returns A > B
+scoreboard players set __ret Internal 0
+execute if score __arg1 Internal > __arg2 Internal run scoreboard players set __ret Internal 1
diff --git a/src/DataPack/mc-asm/data/mcasm/functions/jif.mcfunction b/src/DataPack/mc-asm/data/mcasm/functions/jif.mcfunction
new file mode 100644
index 0000000..8ce2751
--- /dev/null
+++ b/src/DataPack/mc-asm/data/mcasm/functions/jif.mcfunction
@@ -0,0 +1,7 @@
+# jif.mcfunction
+# __arg1 condition value
+# __arg2 __pc value
+# returns nothing
+#
+# change __pc to the given value, if condition is NOT zero.
+execute unless score __arg1 Internal matches 0 run scoreboard players operation __pc Internal = __arg2 Internal
\ No newline at end of file
diff --git a/src/DataPack/mc-asm/data/mcasm/functions/jmp.mcfunction b/src/DataPack/mc-asm/data/mcasm/functions/jmp.mcfunction
new file mode 100644
index 0000000..2bf2604
--- /dev/null
+++ b/src/DataPack/mc-asm/data/mcasm/functions/jmp.mcfunction
@@ -0,0 +1,6 @@
+# jmp.mcfunction
+# __arg1 __pc value
+# returns nothing
+#
+# change __pc to the given value
+scoreboard players operation __pc Internal = __arg1 Internal
\ No newline at end of file
diff --git a/src/DataPack/mc-asm/data/mcasm/functions/le.mcfunction b/src/DataPack/mc-asm/data/mcasm/functions/le.mcfunction
new file mode 100644
index 0000000..56cdd01
--- /dev/null
+++ b/src/DataPack/mc-asm/data/mcasm/functions/le.mcfunction
@@ -0,0 +1,6 @@
+# le.mcfunction
+# __arg1 integer A
+# __arg2 integer B
+# returns A <= B
+scoreboard players set __ret Internal 0
+execute if score __arg1 Internal <= __arg2 Internal run scoreboard players set __ret Internal 1
diff --git a/src/DataPack/mc-asm/data/mcasm/functions/load.mcfunction b/src/DataPack/mc-asm/data/mcasm/functions/load.mcfunction
new file mode 100644
index 0000000..c165f13
--- /dev/null
+++ b/src/DataPack/mc-asm/data/mcasm/functions/load.mcfunction
@@ -0,0 +1,15 @@
+tellraw @a {"text": "MC-ASM Loaded!", "color": "blue"}
+
+scoreboard objectives add Internal dummy
+scoreboard objectives add Variables dummy
+
+scoreboard players reset * Internal
+scoreboard players reset * Variables
+
+scoreboard objectives setdisplay sidebar Internal
+
+scoreboard players add __arg1 Internal 0
+scoreboard players add __arg2 Internal 0
+scoreboard players add __arg3 Internal 0
+scoreboard players add __ret Internal 0
+scoreboard players add __pc Internal 1
diff --git a/src/DataPack/mc-asm/data/mcasm/functions/lt.mcfunction b/src/DataPack/mc-asm/data/mcasm/functions/lt.mcfunction
new file mode 100644
index 0000000..6ff6a88
--- /dev/null
+++ b/src/DataPack/mc-asm/data/mcasm/functions/lt.mcfunction
@@ -0,0 +1,6 @@
+# lt.mcfunction
+# __arg1 integer A
+# __arg2 integer B
+# returns A < B
+scoreboard players set __ret Internal 0
+execute if score __arg1 Internal < __arg2 Internal run scoreboard players set __ret Internal 1
diff --git a/src/DataPack/mc-asm/data/mcasm/functions/mod.mcfunction b/src/DataPack/mc-asm/data/mcasm/functions/mod.mcfunction
new file mode 100644
index 0000000..45bdadf
--- /dev/null
+++ b/src/DataPack/mc-asm/data/mcasm/functions/mod.mcfunction
@@ -0,0 +1,6 @@
+# mod.mcfunction
+# __arg1 integer A
+# __arg2 integer B
+# returns A % B
+scoreboard players operation __ret Internal = __arg1 Internal
+scoreboard players operation __ret Internal %= __arg2 Internal
\ No newline at end of file
diff --git a/src/DataPack/mc-asm/data/mcasm/functions/mul.mcfunction b/src/DataPack/mc-asm/data/mcasm/functions/mul.mcfunction
new file mode 100644
index 0000000..3260835
--- /dev/null
+++ b/src/DataPack/mc-asm/data/mcasm/functions/mul.mcfunction
@@ -0,0 +1,6 @@
+# mul.mcfunction
+# __arg1 integer A
+# __arg2 integer B
+# returns A * B
+scoreboard players operation __ret Internal = __arg1 Internal
+scoreboard players operation __ret Internal *= __arg2 Internal
\ No newline at end of file
diff --git a/src/DataPack/mc-asm/data/mcasm/functions/ne.mcfunction b/src/DataPack/mc-asm/data/mcasm/functions/ne.mcfunction
new file mode 100644
index 0000000..e530117
--- /dev/null
+++ b/src/DataPack/mc-asm/data/mcasm/functions/ne.mcfunction
@@ -0,0 +1,6 @@
+# ne.mcfunction
+# __arg1 integer A
+# __arg2 integer B
+# returns A != B
+scoreboard players set __ret Internal 1
+execute if score __arg1 Internal = __arg2 Internal run scoreboard players set __ret Internal 0
diff --git a/src/DataPack/mc-asm/data/mcasm/functions/sub.mcfunction b/src/DataPack/mc-asm/data/mcasm/functions/sub.mcfunction
new file mode 100644
index 0000000..e38e70f
--- /dev/null
+++ b/src/DataPack/mc-asm/data/mcasm/functions/sub.mcfunction
@@ -0,0 +1,6 @@
+# sub.mcfunction
+# __arg1 integer A
+# __arg2 integer B
+# returns A - B
+scoreboard players operation __ret Internal = __arg1 Internal
+scoreboard players operation __ret Internal -= __arg2 Internal
\ No newline at end of file
diff --git a/src/DataPack/mc-asm/data/mcasm/functions/testing/print_internals.mcfunction b/src/DataPack/mc-asm/data/mcasm/functions/testing/print_internals.mcfunction
new file mode 100644
index 0000000..e072c0e
--- /dev/null
+++ b/src/DataPack/mc-asm/data/mcasm/functions/testing/print_internals.mcfunction
@@ -0,0 +1 @@
+tellraw @a ["",{"text":"*********************\n__arg1 = "},{"score":{"name":"__arg1","objective":"Internal"}},{"text":"\n__arg2 = "},{"score":{"name":"__arg2","objective":"Internal"}},{"text":"\n__ret \u0020= "},{"score":{"name":"__ret","objective":"Internal"}}]
\ No newline at end of file
diff --git a/src/DataPack/mc-asm/data/mcasm/functions/testing/test_cases.mcfunction b/src/DataPack/mc-asm/data/mcasm/functions/testing/test_cases.mcfunction
new file mode 100644
index 0000000..7f53de0
--- /dev/null
+++ b/src/DataPack/mc-asm/data/mcasm/functions/testing/test_cases.mcfunction
@@ -0,0 +1,43 @@
+# test_cases.mcfunction
+# testing/test_function.mcfunction will be ran with the following arguments.
+# this is meant to be only used while testing.
+
+scoreboard players set __arg1 Internal 0
+scoreboard players set __arg2 Internal 0
+function mcasm:testing/test_function
+function mcasm:testing/print_internals
+
+scoreboard players set __arg1 Internal 10
+scoreboard players set __arg2 Internal 0
+function mcasm:testing/test_function
+function mcasm:testing/print_internals
+
+scoreboard players set __arg1 Internal 0
+scoreboard players set __arg2 Internal 10
+function mcasm:testing/test_function
+function mcasm:testing/print_internals
+
+scoreboard players set __arg1 Internal 10
+scoreboard players set __arg2 Internal 20
+function mcasm:testing/test_function
+function mcasm:testing/print_internals
+
+scoreboard players set __arg1 Internal 10
+scoreboard players set __arg2 Internal -20
+function mcasm:testing/test_function
+function mcasm:testing/print_internals
+
+scoreboard players set __arg1 Internal -100
+scoreboard players set __arg2 Internal -10
+function mcasm:testing/test_function
+function mcasm:testing/print_internals
+
+scoreboard players set __arg1 Internal -10
+scoreboard players set __arg2 Internal -10
+function mcasm:testing/test_function
+function mcasm:testing/print_internals
+
+scoreboard players set __arg1 Internal 30
+scoreboard players set __arg2 Internal 30
+function mcasm:testing/test_function
+function mcasm:testing/print_internals
\ No newline at end of file
diff --git a/src/DataPack/mc-asm/data/mcasm/functions/testing/test_function.mcfunction b/src/DataPack/mc-asm/data/mcasm/functions/testing/test_function.mcfunction
new file mode 100644
index 0000000..ae9dadc
--- /dev/null
+++ b/src/DataPack/mc-asm/data/mcasm/functions/testing/test_function.mcfunction
@@ -0,0 +1,4 @@
+# test_function.mcfunction
+# the desired function to be tested in testing/test_cases.mcfunction.
+# this is meant to be only used while testing.
+function mcasm:ass
\ No newline at end of file
diff --git a/src/DataPack/mc-asm/data/mcasm/functions/tick.mcfunction b/src/DataPack/mc-asm/data/mcasm/functions/tick.mcfunction
new file mode 100644
index 0000000..e69de29
diff --git a/src/DataPack/mc-asm/data/minecraft/tags/functions/load.json b/src/DataPack/mc-asm/data/minecraft/tags/functions/load.json
new file mode 100644
index 0000000..ba1fa53
--- /dev/null
+++ b/src/DataPack/mc-asm/data/minecraft/tags/functions/load.json
@@ -0,0 +1,5 @@
+{
+    "values": [
+        "mcasm:load"
+    ]
+}
\ No newline at end of file
diff --git a/src/DataPack/mc-asm/data/minecraft/tags/functions/tick.json b/src/DataPack/mc-asm/data/minecraft/tags/functions/tick.json
new file mode 100644
index 0000000..404c50d
--- /dev/null
+++ b/src/DataPack/mc-asm/data/minecraft/tags/functions/tick.json
@@ -0,0 +1,5 @@
+{
+    "values": [
+        "mcasm:tick"
+    ]
+}
\ No newline at end of file
diff --git a/src/DataPack/mc-asm/pack.mcmeta b/src/DataPack/mc-asm/pack.mcmeta
new file mode 100644
index 0000000..e886707
--- /dev/null
+++ b/src/DataPack/mc-asm/pack.mcmeta
@@ -0,0 +1,6 @@
+{
+    "pack": {
+        "pack_format": 8,
+        "description": "MC-ASM Subroutines, by Gunwoo Kim, Charles Hong"
+    }
+}
\ No newline at end of file