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