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98 lines
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Python

# def ADDI0 = M"001110-----00000----------------" // 67 ra=0
# def ADDIa = M"001110-----1--------------------" // 67
# def ADDIb = M"001110------1-------------------" // 67
# def ADDIc = M"001110-------1------------------" // 67
# def ADDId = M"001110--------1-----------------" // 67
# def ADDIe = M"001110---------1----------------" // 67
# def ADDIS0 = M"001111-----00000----------------" // 67 ra=0
# def ADDISa = M"001111-----1--------------------" // 67
# def ADDISb = M"001111------1-------------------" // 67
# def ADDISc = M"001111-------1------------------" // 67
# def ADDISd = M"001111--------1-----------------" // 67
# def ADDISe = M"001111---------1----------------" // 67
# def ADDPCIS = M"010011--------------------00010-" // 68
# def ADD = M"011111----------------100001010-" // 69 add,add.,addo,addo.
# def ADDIC = M"001100--------------------------" // 69
# def ADDICR = M"001101--------------------------" // 69 addic.
# def ADDC = M"011111----------------000001010-" // 70 addc,addc.,addco,addco.
# def ADDE = M"011111----------------010001010-" // 71 adde,adde.,addeo,addeo.
# def ADDME = M"011111----------------011101010-" // 71 addme,addme.,addmeo,addmeo.
# def ADDZE = M"011111----------------011001010-" // 72 addze,addze.,addzeo,addzeo.
from arch import Op
# not sure this is really needed
from ctypes import c_uint32
class Addi(Op):
def __init__(self, facs):
self.name = 'addi'
self.facs = facs
def do(self, rt, ra, v):
gpr = self.facs.gpr
cia = self.facs.cia
self.rt = rt
self.ra = ra
self.imm = v
v = self.se16(v)
if ra == 'r0':
res = c_uint32(v).value
else:
res = c_uint32(c_uint32(gpr[ra].value).value + v).value
gpr[ra].ref = True
gpr[rt].value = res
gpr[rt].chg = True
self.cia = cia.value
cia.value += 4
self.nia = cia.value
cia.chg = True
self.op = f'{self.name:10s} {self.rt},{self.ra},{self.imm}'
self.res = [(gpr[rt].rname, gpr[rt].value, gpr[rt].comment()),(cia.rname, self.nia, cia.comment())]
return self
class Add(Op):
def __init__(self, facs, rc=False):
self.rc = rc
if rc:
self.name = 'add.'
else:
self.name = 'add'
self.facs = facs
def do(self, rt, ra, rb):
gpr = self.facs.gpr
cia = self.facs.cia
cr = self.facs.cr
xer = self.facs.xer
self.rt = rt
self.ra = ra
self.rb = rb
res = c_uint32(c_uint32(gpr[ra].value).value + c_uint32(gpr[rb].value).value).value
gpr[rt].value = res
gpr[ra].ref = True
gpr[rb].ref = True
gpr[rt].chg = True
if self.rc:
if res == 0:
cr0 = 0x2
elif res >= 2**31:
cr0 = 0x8
else:
cr0 = 0x4
cr0 = cr0 | xer.so()
cr.value = (cr.value & 0x00FFFFFF) | (cr0 << 28)
cr.chg = True
self.cia = cia.value
cia.value += 4
self.nia = cia.value
cia.chg = True
self.op = f'{self.name:10s} {self.rt},{self.ra},{self.rb}'
self.res = [(gpr[rt].rname, gpr[rt].value, gpr[rt].comment())]
if self.rc:
self.res.append((cr.rname, cr.value, cr.comment()))
self.res.append((cia.rname, self.nia, cia.comment()))
return self