1 files changed, 52 insertions, 0 deletions
diff --git a/hdl/core/opcodes.py b/hdl/core/opcodes.py
new file mode 100644
index 0000000..09c5d2c
--- /dev/null
+++ b/hdl/core/opcodes.py
@@ -0,0 +1,52 @@
+from ctypes.wintypes import INT
+from enum import unique, Enum
+from http.client import MULTI_STATUS
+
+
+@unique
+class OpCodes(Enum):
+
+    # R-type
+    NOP    = 0x00
+    ADD    = 0x01
+    SUB    = 0x02
+    XOR    = 0x03
+    OR     = 0x04
+    AND    = 0x05
+    LSL    = 0x06
+    LSR    = 0x07
+    ASR    = 0x08
+    MUL    = 0x09
+    MULU   = 0x0A
+    DIV    = 0x0B     # not implemented yet
+    DIVU   = 0x0C     # not implemented yet
+
+    # I-type
+    ADDI   = 0x40
+    SUBI   = 0x41
+    XORI   = 0x42
+    ORI    = 0x43
+    ANDI   = 0x44
+    LSLI   = 0x45
+    LSRI   = 0x46
+    ASRI   = 0x47
+    MULI   = 0x48
+    MULUI  = 0x49
+    DIVI   = 0x4A     # not implemented yet
+    DIVUI  = 0x4B     # not implemented yet
+
+    # J-type
+    JMP    = 0x80
+    JMPI   = 0x81
+
+    # C-type (control), 2 MSB -> System mode only
+    CALL   = 0xA0
+    RET    = 0xA1
+    SCALL  = 0xA2
+
+    # ------------------ System mode only ------------------
+    INT    = 0xC0
+    IRET   = 0xC1
+    INVP   = 0xC2
+
+