Instruction Encoding

I_format.py

@@ -0,0 +1,219 @@
+def binary12(num):
+    li = []
+    if num >= 0:
+
+        for i in range(0, 12):
+            li.insert(0, int(num % 2))
+            num = int(num / 2)
+    else:
+        num3 = 4096 + num
+        for i in range(0, 12):
+            li.insert(0, int(num3 % 2))
+            num3 = int(num3 / 2)
+    return li
+
+
+def binary5(num):
+    li = []
+    for i in range(0, 5):
+        li.insert(0, int(num % 2))
+        num = int(num / 2)
+
+    return li
+
+
+def addi(rd, rs1, imm):
+    s1 = binary5(rs1)
+    s2 = binary12(imm)
+    s3 = binary5(rd)
+    li = []
+    # insert funct3
+    li[0:11] = s2
+    li[12:16] = s1
+    li.append(0)
+    li.append(0)
+    li.append(0)
+
+    li[20:24] = s3
+    # insert opcode
+    li.append(0)
+    li.append(0)
+    li.append(1)
+    li.append(0)
+    li.append(0)
+    li.append(1)
+    li.append(1)
+
+    return li
+
+
+def ori(rd, rs1, imm):
+    s1 = binary5(rs1)
+    s2 = binary12(imm)
+    s3 = binary5(rd)
+    li = []
+
+    # insert funct3
+    li[0:11] = s2
+    li[12:16] = s1
+    li.append(1)
+    li.append(1)
+    li.append(0)
+    li[20:24] = s3
+    # insert opcode
+    li.append(0)
+    li.append(0)
+    li.append(1)
+    li.append(0)
+    li.append(0)
+    li.append(1)
+    li.append(1)
+
+    return li
+
+
+def andi(rd, rs1, imm):
+    s1 = binary5(rs1)
+    s2 = binary12(imm)
+    s3 = binary5(rd)
+    li = []
+    # insert funct3
+    li[0:11] = s2
+    li[12:16] = s1
+    li.append(1)
+    li.append(1)
+    li.append(1)
+
+    li[20:24] = s3
+    li.append(0)
+    li.append(0)
+    li.append(1)
+    li.append(0)
+    li.append(0)
+    li.append(1)
+    li.append(1)
+
+    # insert opcode
+    return li
+
+
+def ld(rd, rs1, imm):
+    s1 = binary5(rs1)
+    s2 = binary12(imm)
+    s3 = binary5(rd)
+    li = []
+    # insert funct3
+    li[0:11] = s2
+    li[12:16] = s1
+    li.append(0)
+    li.append(1)
+    li.append(1)
+
+    li[20:24] = s3
+    # insert opcode
+    li.append(0)
+    li.append(0)
+    li.append(0)
+    li.append(0)
+    li.append(0)
+    li.append(1)
+    li.append(1)
+
+    return li
+
+
+def lb(rd, rs1, imm):
+    s1 = binary5(rs1)
+    s2 = binary12(imm)
+    s3 = binary5(rd)
+    li = []
+    # insert funct3
+    li[0:11] = s2
+    li[12:16] = s1
+    li.append(0)
+    li.append(0)
+    li.append(0)
+
+    li[20:24] = s3
+    # insert opcode
+    li.append(0)
+    li.append(0)
+    li.append(0)
+    li.append(0)
+    li.append(0)
+    li.append(1)
+    li.append(1)
+    return li
+
+
+def lh(rd, rs1, imm):
+    s1 = binary5(rs1)
+    s2 = binary12(imm)
+    s3 = binary5(rd)
+    li = []
+    # insert funct3
+    li[0:11] = s2
+    li[12:16] = s1
+    li.append(0)
+    li.append(0)
+    li.append(1)
+
+    li[20:24] = s3
+    # insert opcode
+    li.append(0)
+    li.append(0)
+    li.append(0)
+    li.append(0)
+    li.append(0)
+    li.append(1)
+    li.append(1)
+    return li
+
+
+def lw(rd, rs1, imm):
+    s1 = binary5(rs1)
+    s2 = binary12(imm)
+    s3 = binary5(rd)
+    li = []
+    # insert funct3
+    li[0:11] = s2
+    li[12:16] = s1
+    li.append(0)
+    li.append(1)
+    li.append(0)
+
+    li[20:24] = s3
+    # insert opcode
+    li.append(0)
+    li.append(0)
+    li.append(0)
+    li.append(0)
+    li.append(0)
+    li.append(1)
+    li.append(1)
+    return li
+
+
+def jalr(rd, rs1, imm):
+    s1 = binary5(rs1)
+    s2 = binary12(imm)
+    s3 = binary5(rd)
+    li = []
+    # insert funct3
+    li[0:11] = s2
+    li[12:16] = s1
+    li.append(0)
+    li.append(0)
+    li.append(0)
+
+    li[20:24] = s3
+    # insert opcode
+    li.append(1)
+    li.append(1)
+    li.append(0)
+    li.append(0)
+    li.append(1)
+    li.append(1)
+    li.append(1)
+
+    return li