A tinycrypt/esp32s3/mult256-gen.py

@@ -0,0 +1,23 @@
+print("xt_fastmult256:")
+# `a0` is return address, `a1` is stack pointer, `a2` is input `a`, `a3` is input `b`, `a4` is output buffer
+print(f"  movi a5, {4 * (16 * 9 + 1)}")
+print("  sub a1, a1, a5")
+print("  s32i a0, a1, 0")
+
+# Time to generate the lookup table!
+def add36(a, b, out):
+    print(f"  l32i a6, {a}")
+    print(f"  l32i a7, {b}")
+    print("  add a8, a6, a7")
+    print("  sub a9, a8, a6")
+    print("  movi a10, 1")
+    print("  xor a10, a10, a10")
+    print("  movltz a11, a10, a9")
+
+print("  xor a5, a5, a5")
+print("  s32i a5, a1, 1")
+for i in range(8):
+    print(f"  l32i a5, a2, {i}")
+    print(f"  s32i a5, a1, {2 + i}")
+for i in range(1, 16):
+    pass