Decode Inst.

decode1.py

@@ -0,0 +1,122 @@
+from binary_to_decimal import *
+from globalss import *
+
+
+def decode(lii):
+    global reg
+    # print(lii)
+    i = 0
+    typee = ''
+    while i < len(major_opcode_value):
+        if major_opcode_value[i] == str(lii[25:32]):
+            typee = major_opcode_name[i]
+        i = i + 1
+    # print(typee)
+    # typee has been obtained in typee        
+    if typee == 'R':
+        reg.append(int(lii[20:25], 2))
+        reg.append(int(lii[12:17], 2))
+        reg.append(int(lii[7:12], 2))
+        reg.append(-1)
+        reg.append('R')
+    elif typee == 'I_1':
+        reg.append(int(lii[20:25], 2))
+        reg.append(int(lii[12:17], 2))
+        reg.append(-1)
+        reg.append(binary_2_decimal(lii[0:12]))
+        reg.append('I_1')
+    elif typee == 'I_2':
+        reg.append(int(lii[20:25], 2))
+        reg.append(int(lii[12:17], 2))
+        reg.append(-1)
+        reg.append(binary_2_decimal(lii[0:12]))
+        reg.append('I_2')
+    elif typee == 'I_3':
+        reg.append(int(lii[20:25], 2))
+        reg.append(int(lii[12:17], 2))
+        reg.append(-1)
+        reg.append(binary_2_decimal(lii[0:12]))
+        reg.append('I_3')
+    elif typee == 'S':
+        reg.append(-1)
+        reg.append(int(lii[12:17], 2))
+        reg.append(int(lii[7:12], 2))
+        reg.append(binary_2_decimal(lii[20:25] + lii[0:7]))
+        reg.append('S')
+    elif typee == 'SB':
+        reg.append(-1)
+        reg.append(int(lii[12:17], 2))
+        reg.append(int(lii[7:12], 2))
+        reg.append(2 * binary_2_decimal(lii[20:24] + lii[1:7] + lii[24:25] + lii[0:1]))
+        reg.append('SB')
+    elif typee == 'U_lui':
+        reg.append(int(lii[20:25], 2))
+        reg.append(-1)
+        reg.append(-1)
+        reg.append(lii[0:20])
+        reg.append('U_lui')
+    elif typee == 'U_auipc':
+        reg.append(int(lii[20:25], 2))
+        reg.append(-1)
+        reg.append(-1)
+        reg.append(binary_2_decimal(lii[0:20]))
+        reg.append('U_auipc')
+    elif typee == 'UJ':
+        reg.append(int(lii[20:25], 2))
+        reg.append(-1)
+        reg.append(-1)
+        reg.append(2 * binary_2_decimal(lii[0:20]))
+        reg.append('UJ')
+    return reg
+
+
+def determine_exact_instruction(lii, reg):
+    # reg=[rd,rs1,rs2,imm,type]
+    i = 0
+    if reg[4] == 'R':
+        while i < len(R):
+            if lii[17:20] == Rfun3[i] and lii[0:7] == Rfun7[i]:
+                reg.append(R[i])
+                break
+            i = i + 1
+    elif reg[4] == 'I_1':
+        while i < len(I_1):
+            if lii[17:20] == I_1fun3[i]:
+                reg.append(I_1[i])
+                break
+            i = i + 1
+
+    elif reg[4] == 'I_2':
+        while i < len(I_2):
+            if lii[17:20] == I_2fun3[i]:
+                reg.append(I_2[i])
+                break
+            i = i + 1
+
+    elif reg[4] == 'I_3':
+        reg.append('jalr')
+
+    elif reg[4] == 'S':
+        while i < len(S):
+            if lii[17:20] == Sfun3[i]:
+                reg.append(S[i])
+                break
+            i = i + 1
+
+    elif reg[4] == 'SB':
+        while i < len(SB):
+            if lii[17:20] == SBfun3[i]:
+                reg.append(SB[i])
+                break
+            i = i + 1
+
+    elif reg[4] == 'U_lui':
+        reg.append('lui')
+
+    elif reg[4] == 'U_auipc':
+        reg.append('auipc')
+
+    elif reg[4] == 'UJ':
+        reg.append('jal')
+
+    return reg