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def render(instruction):
return "{} {}".format(instruction['mnemonic'], instruction['op'])
def Table_5_12(nibble):
return "Table 5.12 TODO"
def Table_5_11(nibble):
return "Table 5.11 TODO"
def Table_5_10(nibble):
return "Table 5.10 TODO"
def YDataPrefetchDest_5_9(nibble):
return "Table 5.9 TODO"
def YDataPrefetchOperation_5_8(nibble):
return "Table 5.8 TODO"
def XDataPrefetchDest_5_7(nibble):
return "Table 5.7 TODO"
def XDataPrefetchOperation_5_6(nibble):
return "Table 5.6 TODO"
def readWd_5_5(octet):
return [
"Wd",
"[Wd]",
"[Wd--]",
"[Wd++]",
"[--Wd]",
"[++Wd]",
"[Wd + Wb]",
"[Wd + Wb]"
][octet]
def readWs_5_4(octet):
return [
"Ws",
"[Ws]",
"[Ws--]",
"[Ws++]",
"[--Ws]",
"[++Ws]",
"[Ws + Wb]",
"[Ws + Wb]"
][octet]
def readWd_5_3(octet):
return [
"Wd",
"[Wd]",
"[Wd--]",
"[Wd++]",
"[--Wd]",
"[++Wd]",
"ERR",
"ERR"
][octet]
def readWs_5_2(octet):
return [
"Ws",
"[Ws]",
"[Ws--]",
"[Ws++]",
"[--Ws]",
"[++Ws]",
"ERR",
"ERR"
][octet]
def disassemble(blob, offset):
# print ("Disassembling " + str(blob))
instrbytes = blob[offset:offset + 3]
# instrbytes.reverse()
print("Disassembling {} {} {}".format(hex(instrbytes[0]), hex(instrbytes[1]), hex(instrbytes[2])))
instr = {}
instr['op'] = ''
size = 1
if instrbytes[2] == 0x0:
instr['mnemonic'] = 'nop'
if instrbytes[2] == 0x1:
instr['mnemonic'] = 'br*'
if instrbytes[2] == 0x2:
instr['mnemonic'] = 'call'
if instrbytes[2] == 0x3:
instr['mnemonic'] = '-'
if instrbytes[2] == 0x4:
instr['mnemonic'] = 'goto'
size = 2
w2 = blob[offset + 3:offset + 6]
# w2.reverse()
n_hi = ((instrbytes[1] << 8) + instrbytes[0])
if w2[0] != 0 or w2[1] != 0:
instr['mnemonic'] = 'goto [BAD]'
n_lo = w2[0]
n = n_hi + (n_lo << 16)
instr["op"] = hex(n)
if instrbytes[2] == 0x5:
instr['mnemonic'] = 'retlw'
if instrbytes[2] == 0x6:
instr['mnemonic'] = 'retfie'
if instrbytes[2] == 0x7:
instr['mnemonic'] = 'rcall'
if instrbytes[2] == 0x8:
instr['mnemonic'] = 'do'
if instrbytes[2] == 0x9:
instr['mnemonic'] = 'repeat'
if instrbytes[2] == 0xa:
instr['mnemonic'] = '-'
if instrbytes[2] == 0xb:
instr['mnemonic'] = '-'
if instrbytes[2] == 0xc:
instr['mnemonic'] = 'bra(oa)'
instr['mnemonic'] += " (dsPIC3XF only)"
if instrbytes[2] == 0xd:
instr['mnemonic'] = 'bra(ob)'
instr['mnemonic'] += " (dsPIC3XF only)"
if instrbytes[2] == 0xe:
instr['mnemonic'] = 'bra(sa)'
instr['mnemonic'] += " (dsPIC3XF only)"
if instrbytes[2] == 0xf:
instr['mnemonic'] = 'bra(sb)'
instr['mnemonic'] += " (dsPIC3XF only)"
if instrbytes[2] >= 0x10 and instrbytes[2] < 0x18:
instr['mnemonic'] = 'subr'
if instrbytes[2] >= 0x18 and instrbytes[2] < 0x20:
instr['mnemonic'] = 'subbr'
if instrbytes[2] >= 0x20 and instrbytes[2] < 0x30:
instr['mnemonic'] = 'mov'
word = instrbytes[0] | (instrbytes[1] << 8) | (instrbytes[2] << 16)
imm = (word & 0x0ffff0) >> 4
reg = word & 0xf
instr['op'] = "#" + hex(imm) + ", W" + str(reg)
if instrbytes[2] >= 0x80 and instrbytes[2] < 0x90:
instr['mnemonic'] = 'mov'
word = instrbytes[0] | (instrbytes[1] << 8) | (instrbytes[2] << 16)
f = (word & 0x07fff0) >> 4
reg = word & 0xf
if instrbytes[2] < 0x88:
instr['op'] = "[" + hex(f) + "], W" + str(reg)
else:
instr['op'] = "W" + str(reg) + ", [" + hex(f) + "]"
if instrbytes[2] >= 0xc0 and instrbytes[2] < 0xd0:
instr['mnemonic'] = "(dsPIC3XF only)"
if instrbytes[2] == 0xB4 and (instrbytes[1] & 0x80) == 0x00:
instr['mnemonic'] = "ADD"
B = instrbytes[1] & 0x40
D = instrbytes[1] & 0x20
f = ((instrbytes[1] & 0x1f) << 8) + instrbytes[0]
if B:
instr['mnemonic'] += '.B'
instr['op'] = "RAM:" + hex(f)
if D:
instr['op'] += ', W0'
if instrbytes[2] == 0xaa:
instr['mnemonic'] = "BTG"
# TODO: not clear what is .B mode
bit4 = ((instrbytes[1] >> 4) & 0x0e) + (instrbytes[0] & 0x01)
f = ((instrbytes[1] & 0x1f) << 7) + (instrbytes[0] >> 1)
instr['op'] = "{}, #{}".format(hex(f), hex(bit4))
if instrbytes[2] == 0xba:
instr['mnemonic'] = "TBLRD"
if (instrbytes[1] & 0x80) != 0:
instr['mnemonic'] += 'H'
else:
instr['mnemonic'] += 'L'
if (instrbytes[1] & 0x40) != 0:
instr['mnemonic'] += '.B'
s = (instrbytes[0] & 0x0f)
p = (instrbytes[0] >> 4) & 0x07
d = ((instrbytes[0] >> 7) & 0x01) + ((instrbytes[1] << 1) & 0xf)
q = (instrbytes[1] & 0x38) >> 3
srcOp = readWs_5_2(p).replace("Ws", "W" + str(s))
dstOp = readWd_5_3(q).replace("Wd", "W" + str(d))
instr['op'] = "{}, {}".format(srcOp, dstOp)
if instrbytes[2] == 0xbb:
instr['mnemonic'] = "TBLWT"
if (instrbytes[1] & 0x80) != 0:
instr['mnemonic'] += 'H'
else:
instr['mnemonic'] += 'L'
if (instrbytes[1] & 0x40) != 0:
instr['mnemonic'] += '.B'
s = (instrbytes[0] & 0x0f)
p = (instrbytes[0] >> 4) & 0x07
d = ((instrbytes[0] >> 7) & 0x01) + ((instrbytes[1] << 1) & 0xf)
q = (instrbytes[1] & 0x38) >> 3
srcOp = readWs_5_2(p).replace("Ws", "W" + str(s))
dstOp = readWd_5_3(q).replace("Wd", "W" + str(d))
instr['op'] = "{}, {}".format(srcOp, dstOp)
if 'mnemonic' not in instr:
instr = instrbytes[0] | (instrbytes[1] << 8) | (instrbytes[2] << 16)
return (offset + 3, "Unknown instruction: " + hex(instr))
return (offset + 3 * size, instr)
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