1 files changed, 104 insertions, 0 deletions
diff --git a/tools/utilities/greg_calc.py b/tools/utilities/greg_calc.py
new file mode 100644
index 0000000000..40e1004907
--- /dev/null
+++ b/tools/utilities/greg_calc.py
@@ -0,0 +1,104 @@
+import sys
+
+REG_F = {
+    "TREG_F": 0x00c,
+    "DREG_F": 0x09c,
+    "IREG_F": 0x12c,
+    "SREG_F": 0x1bc,
+    "UREG_F": 0x24c,
+    "OREG_F": 0x2dc,
+    "YREG_F": 0x36c,
+    "KREG_F": 0x3fc,
+    "BREG_F": 0x48c,
+    "MREG_F": 0x51c,
+    "AREG_F": 0x5ac,
+    "PREG_F": 0x63c,
+    "NREG_F": 0x6cc,
+    "WREG_F": 0x75c,
+    "JREG_F": 0x7ec,
+    "HREG_F": 0x87c,
+    "VREG_F": 0x90c,
+    "XREG_F": 0x99c,
+    "ZREG_F": 0xa2c,
+    "nREG_F": 0xabc,
+    "kREG_F": 0xb4c,
+    "oREG_F": 0xbdc,
+    "yREG_F": 0xc6c,
+    "aREG_F": 0xcfc,
+    "hREG_F": 0xd8c,
+    "tREG_F": 0xe1c
+}
+
+REG_S = {
+    "TREG_S": 0x084,
+    "DREG_S": 0x114,
+    "IREG_S": 0x1a4,
+    "SREG_S": 0x234,
+    "UREG_S": 0x2c4,
+    "OREG_S": 0x354,
+    "YREG_S": 0x3e4,
+    "KREG_S": 0x474,
+    "BREG_S": 0x504,
+    "MREG_S": 0x594,
+    "AREG_S": 0x624,
+    "PREG_S": 0x6b4,
+    "NREG_S": 0x744,
+    "WREG_S": 0x7d4,
+    "JREG_S": 0x864,
+    "HREG_S": 0x8f4,
+    "VREG_S": 0x984,
+    "XREG_S": 0xa14,
+    "ZREG_S": 0xaa4,
+    "nREG_S": 0xb34,
+    "kREG_S": 0xbc4,
+    "oREG_S": 0xc54,
+    "yREG_S": 0xce4,
+    "aREG_S": 0xd74,
+    "hREG_S": 0xe04,
+    "tREG_S": 0xe94
+}
+
+
+def find_register(hex_val, reg_map, step):
+    best_match = None
+    best_base = -1
+
+    for name, base in reg_map.items():
+        if base <= hex_val and base > best_base:
+            best_match = name
+            best_base = base
+
+    if best_match is not None:
+        index = (hex_val - best_base) // step
+        expected = best_base + index * step
+        if expected == hex_val:
+            return f"{best_match}({index})"
+
+    raise ValueError("No matching register found.")
+
+
+def main():
+    if len(sys.argv) != 3:
+        print("Usage: greg_calc.py [s|f] [hex_val]")
+        return
+
+    mode = sys.argv[1].lower()
+    try:
+        hex_val = int(sys.argv[2], 16)
+    except ValueError:
+        print("Invalid hex value. Use format like 0x75c")
+        return
+
+    if mode == 'f':
+        result = find_register(hex_val, REG_F, 4)
+    elif mode == 's':
+        result = find_register(hex_val, REG_S, 2)
+    else:
+        print("Invalid mode. Use 's' for short or 'f' for float.")
+        return
+
+    print(result)
+
+
+if __name__ == "__main__":
+    main()