diff --git a/code/gen_impl.py b/code/gen_impl.py
new file mode 100644
index 00000000..afc2aea8
--- /dev/null
+++ b/code/gen_impl.py
@@ -0,0 +1,36 @@
+widths_all = ["b", "bu", "h", "hu", "w", "wu", "d", "du"]
+
+widths = {
+    "b": 8,
+    "bu": 8,
+    "h": 16,
+    "hu": 16,
+    "w": 32,
+    "wu": 32,
+    "d": 64,
+    "du": 64,
+    "q": 128,
+}
+
+members = {
+    "b": "byte",
+    "bu": "byte",
+    "h": "half",
+    "hu": "half",
+    "w": "word",
+    "wu": "word",
+    "d": "dword",
+    "du": "dword",
+}
+
+for width in widths_all:
+    w = widths[width]
+    m = members[width]
+    if "u" in width:
+        sign = "u"
+    else:
+        sign = "s"
+    with open(f"vavg_{width}.h", 'w') as f:
+        print(f'for (int i = 0;i < {128 // w};i++) {{', file=f)
+        print(f'  dst.{m}[i] = (({sign}{w})a.{m}[i] >> 1) + (({sign}{w})b.{m}[i] >> 1) + (a.{m}[i] & b.{m}[i] & 1);', file=f)
+        print(f'}}', file=f)
\ No newline at end of file
diff --git a/code/vavg_b.h b/code/vavg_b.h
index 52e8d94f..543381ca 100644
--- a/code/vavg_b.h
+++ b/code/vavg_b.h
@@ -1,3 +1,3 @@
-for (int i = 0; i < 16; i++) {
+for (int i = 0;i < 16;i++) {
   dst.byte[i] = ((s8)a.byte[i] >> 1) + ((s8)b.byte[i] >> 1) + (a.byte[i] & b.byte[i] & 1);
-}
\ No newline at end of file
+}
diff --git a/code/vavg_bu.h b/code/vavg_bu.h
index 4a9cb99c..85c9794e 100644
--- a/code/vavg_bu.h
+++ b/code/vavg_bu.h
@@ -1,3 +1,3 @@
-for (int i = 0; i < 16; i++) {
+for (int i = 0;i < 16;i++) {
   dst.byte[i] = ((u8)a.byte[i] >> 1) + ((u8)b.byte[i] >> 1) + (a.byte[i] & b.byte[i] & 1);
-}
\ No newline at end of file
+}
diff --git a/code/vavg_d.h b/code/vavg_d.h
index 91fa226b..7701565d 100644
--- a/code/vavg_d.h
+++ b/code/vavg_d.h
@@ -1,3 +1,3 @@
-for (int i = 0; i < 2; i++) {
+for (int i = 0;i < 2;i++) {
   dst.dword[i] = ((s64)a.dword[i] >> 1) + ((s64)b.dword[i] >> 1) + (a.dword[i] & b.dword[i] & 1);
-}
\ No newline at end of file
+}
diff --git a/code/vavg_du.h b/code/vavg_du.h
index 0cdb930b..e1897fe7 100644
--- a/code/vavg_du.h
+++ b/code/vavg_du.h
@@ -1,3 +1,3 @@
-for (int i = 0; i < 2; i++) {
+for (int i = 0;i < 2;i++) {
   dst.dword[i] = ((u64)a.dword[i] >> 1) + ((u64)b.dword[i] >> 1) + (a.dword[i] & b.dword[i] & 1);
-}
\ No newline at end of file
+}
diff --git a/code/vavg_h.h b/code/vavg_h.h
index d9eaeb37..43133408 100644
--- a/code/vavg_h.h
+++ b/code/vavg_h.h
@@ -1,3 +1,3 @@
-for (int i = 0; i < 8; i++) {
+for (int i = 0;i < 8;i++) {
   dst.half[i] = ((s16)a.half[i] >> 1) + ((s16)b.half[i] >> 1) + (a.half[i] & b.half[i] & 1);
-}
\ No newline at end of file
+}
diff --git a/code/vavg_hu.h b/code/vavg_hu.h
index be428af1..f7b7d0f5 100644
--- a/code/vavg_hu.h
+++ b/code/vavg_hu.h
@@ -1,3 +1,3 @@
-for (int i = 0; i < 8; i++) {
+for (int i = 0;i < 8;i++) {
   dst.half[i] = ((u16)a.half[i] >> 1) + ((u16)b.half[i] >> 1) + (a.half[i] & b.half[i] & 1);
-}
\ No newline at end of file
+}
diff --git a/code/vavg_w.h b/code/vavg_w.h
index 32b0cf81..0f258e56 100644
--- a/code/vavg_w.h
+++ b/code/vavg_w.h
@@ -1,3 +1,3 @@
-for (int i = 0; i < 4; i++) {
+for (int i = 0;i < 4;i++) {
   dst.word[i] = ((s32)a.word[i] >> 1) + ((s32)b.word[i] >> 1) + (a.word[i] & b.word[i] & 1);
-}
\ No newline at end of file
+}
diff --git a/code/vavg_wu.h b/code/vavg_wu.h
index 7ab30ee6..22764aa9 100644
--- a/code/vavg_wu.h
+++ b/code/vavg_wu.h
@@ -1,3 +1,3 @@
-for (int i = 0; i < 4; i++) {
+for (int i = 0;i < 4;i++) {
   dst.word[i] = ((u32)a.word[i] >> 1) + ((u32)b.word[i] >> 1) + (a.word[i] & b.word[i] & 1);
-}
\ No newline at end of file
+}