def parse_line(s):
# print('{}: {}'.format(read_bytes, s))
m = op_pat.match(s)
m2 = const_pat.match(s)
if m is not None:
op_name = m.group('op_name')
# ここかっこよくやる方法わからん
g = m.group('args')
if g is None:
args = []
else:
args = m.group('args').replace(' ', '').replace('\t',
'').split(',')
try:
a = asm(op_name, args)
except Exception as e:
error_line(s)
raise e
return a
elif m2 is not None:
value = m2.group('value')
i = utils.check_and_trans_imm(value, 32)
return utils.int2u32b(i)
elif debug:
print('{} is ignored'.format(s))
return None
def lui(rd, imm):
rd = check_and_trans_reg(rd)
imm = check_and_trans_imm(imm, 20)
return pack([
(0b0110111, 7),
(rd, 5),
(imm, 20)
])
def auipc(rd, imm):
rd = check_and_trans_reg(rd)
v = check_and_trans_imm(imm, 20)
return pack([
(0b0010111, 7),
(rd, 5),
(v, 20)
])
def tail(imm):
imm = utils.check_and_trans_imm(imm, 32)
ui = str((imm >> 12) + ((imm >> 11) & 1))
li = str(imm & (1 << 12 - 1))
l = [
('auipc', ('x6', ui)),
('jalr', ('x0', 'x6', li)),
]
return l
def jal(rd, imm):
rd = check_and_trans_reg(rd)
imm = check_and_trans_imm(imm, 20)
# check_alignment(imm, 2)
return pack([
(0b1101111, 7),
(rd, 5),
(bit_reorder(imm, [19, *range(9, -1, -1), 10, *range(18, 10, -1)]), 20)
])
def alui(rd, funct3, rs1, imm):
imm = check_and_trans_imm(imm, 12)
rd = check_and_trans_reg(rd)
rs1 = check_and_trans_reg(rs1)
return pack([
(0b0010011, 7),
(rd, 5),
(funct3, 3),
(rs1, 5),
(imm, 12)
])
def jalr(rd, rs, imm):
rd = check_and_trans_reg(rd)
rs = check_and_trans_reg(rs)
v = check_and_trans_imm(imm, 12)
return pack([
(0b1100111, 7),
(rd, 5),
(0, 3),
(rs, 5),
(v, 12),
])
def flw(rd, rs1, imm):
imm = check_and_trans_imm(imm, 12)
rd = check_and_trans_reg(rd)
rs1 = check_and_trans_reg(rs1)
return pack([
(0b0000111, 7),
(rd, 5),
(0b010, 3),
(rs1, 5),
(imm, 12)
])
def shift(rd, funct3, rs1, imm1, imm2):
imm1 = check_and_trans_imm(imm1, 7)
rd = check_and_trans_reg(rd)
rs1 = check_and_trans_reg(rs1)
return pack([
(0b0010011, 7),
(rd, 5),
(funct3, 3),
(rs1, 5),
(imm1, 5),
(imm2, 7)
])
def branch(imm, funct3, rs1, rs2):
imm = check_and_trans_imm(imm, 12)
rs1 = check_and_trans_reg(rs1)
rs2 = check_and_trans_reg(rs2)
val = ((imm & 0b1111) << 1) | ((imm >> 10) & 1)
val2 = ((imm >> 4) & 0b111111) | (((imm >> 11) & 1) << 6)
return pack([
(0b1100011, 7),
(val, 5),
(funct3, 3),
(rs1, 5),
(rs2, 5),
(val2, 7)
])
def fsw(rs1, rs2, imm):
imm = check_and_trans_imm(imm, 12)
rs1 = check_and_trans_reg(rs1)
rs2 = check_and_trans_reg(rs2)
val = (imm & 0b11111)
val2 = (imm >> 5)
return pack([
(0b0100111, 7),
(val, 5),
(0b010, 3),
(rs2, 5),
(rs1, 5),
(val2, 7),
])
def bnei(rs, rt, imm):
rt = utils.check_and_trans_imm(str(utils.get_reg(rt) - 16), 5)
l = [('bgeu', (rs, 'x' + str(rt), imm))]
return l
def li(rd, imm):
imm = utils.check_and_trans_imm(imm, 32)
ui = str((imm >> 12) + ((imm >> 11) & 1))
li = str(imm & ((1 << 12) - 1))
l = [('lui', [rd, ui]), ('addi', [rd, rd, li])]
return l
