def parse_cui(data):
"""
assert parse_cui('\x00zcbag')[0] == 0
assert parse_cui('\x7fzcbag')[0] == 0x7f
assert parse_cui('\x80\x80zcbag')[0] == 0x80
assert parse_cui('\xbf\xffzcbag')[0] == 0x3fff
assert parse_cui('\xc0\x00\x40\x00zcbag')[0] == 0x4000
assert parse_cui('\xdf\xff\xff\xffzcbag')[0] == 0x1fffffff
assert parse_cui('\xe0\x20\x00\x00\x00zcbag')[0] == 0x20000000
assert parse_cui('\xe0\xff\xff\xff\xffzcbag')[0] == 0xffffffff
assert parse_cui('\xe0\xff\xff\xff\xffzcbag')[1] == 'zcbag'
"""
_id = ord(data[0]) & 0xf0
if _id < 0x80:
length = 1
diff = 0
elif _id < 0xc0: #0x80 <= _id < 0xc0:
length = 2
diff = 0x8000
elif _id < 0xe0: #0xc0 <= _id < 0xe0:
length = 4
diff = 0xc0000000
elif _id == 0xe0:
length = 5
diff = 0xe000000000
else:
raise RuntimeError("Could parse cui: 0x%X" % ord(data[0]))
res = utils.bin2int(data[:length]) - diff
return res, data[length:]
def parse_cui(data):
"""
assert parse_cui('\x00zcbag')[0] == 0
assert parse_cui('\x7fzcbag')[0] == 0x7f
assert parse_cui('\x80\x80zcbag')[0] == 0x80
assert parse_cui('\xbf\xffzcbag')[0] == 0x3fff
assert parse_cui('\xc0\x00\x40\x00zcbag')[0] == 0x4000
assert parse_cui('\xdf\xff\xff\xffzcbag')[0] == 0x1fffffff
assert parse_cui('\xe0\x20\x00\x00\x00zcbag')[0] == 0x20000000
assert parse_cui('\xe0\xff\xff\xff\xffzcbag')[0] == 0xffffffff
assert parse_cui('\xe0\xff\xff\xff\xffzcbag')[1] == 'zcbag'
"""
_id = ord(data[0]) & 0xf0
if _id < 0x80:
length = 1
diff = 0
elif _id < 0xc0: #0x80 <= _id < 0xc0:
length = 2
diff = 0x8000
elif _id < 0xe0: #0xc0 <= _id < 0xe0:
length = 4
diff = 0xc0000000
elif _id == 0xe0:
length = 5
diff = 0xe000000000
else:
raise RuntimeError("Could parse cui: 0x%X" % ord(data[0]))
res = utils.bin2int(data[:length]) - diff
return res, data[length:]
def jal(sim, inst_bin):
imm = inst_bin[6:]
return "jal {}".format(utils.bin2int(imm))
def decode_FI(inst_bin): fs = int(inst_bin[11:16], 2) imm = utils.bin2int(inst_bin[16:]) return fs, imm
def decode_I(inst_bin): rs = int(inst_bin[6:11], 2) rt = int(inst_bin[11:16], 2) imm = utils.bin2int(inst_bin[16:]) return rs, rt, imm
def decode_R(inst_bin): rs = int(inst_bin[6:11], 2) rt = int(inst_bin[11:16], 2) rd = int(inst_bin[16:21], 2) shamt = utils.bin2int(inst_bin[21:26]) return rs, rt, rd, shamt
