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89 lines
2.4 KiB
Python
89 lines
2.4 KiB
Python
3 years ago
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from amaranth import *
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from amaranth.asserts import AnyConst
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from amaranth.hdl.ast import ValueCastable
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class Instruction_I(ValueCastable):
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po = None
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li = None
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aa = None
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lk = None
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def __init_subclass__(cls, *, po, aa, lk):
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cls.po = Const(po, unsigned(6))
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cls.aa = Const(aa, 1)
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cls.lk = Const(lk, 1)
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def __init__(self):
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self.li = AnyConst(signed(24))
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@ValueCastable.lowermethod
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def as_value(self):
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return Cat(self.lk, self.aa, self.li, self.po)
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class Instruction_B(ValueCastable):
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po = None
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bo = None
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bi = None
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bd = None
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aa = None
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lk = None
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def __init_subclass__(cls, *, po, aa, lk):
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cls.po = Const(po, unsigned(6))
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cls.aa = Const(aa, 1)
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cls.lk = Const(lk, 1)
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def __init__(self):
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self.bo = AnyConst(unsigned( 5))
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self.bi = AnyConst(unsigned( 5))
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self.bd = AnyConst( signed(14))
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@ValueCastable.lowermethod
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def as_value(self):
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return Cat(self.lk, self.aa, self.bd, self.bi, self.bo, self.po)
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class Instruction_XL_b(ValueCastable):
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po = None
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bo = None
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bi = None
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_0 = None
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bh = None
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xo = None
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lk = None
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def __init_subclass__(cls, *, po, xo, lk):
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cls.po = Const(po, unsigned(6))
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cls.xo = Const(xo, unsigned(9))
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cls.lk = Const(1)
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def __init__(self):
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self.bo = AnyConst(unsigned(5))
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self.bi = AnyConst(unsigned(5))
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self._0 = AnyConst(unsigned(3))
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self.bh = AnyConst(unsigned(2))
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@ValueCastable.lowermethod
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def as_value(self):
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return Cat(self.lk, self.xo, self.bh, self._0, self.bi, self.bo, self.po)
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class B (Instruction_I, po=18, aa=0, lk=0): pass
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class BA (Instruction_I, po=18, aa=1, lk=0): pass
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class BL (Instruction_I, po=18, aa=0, lk=1): pass
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class BLA (Instruction_I, po=18, aa=1, lk=1): pass
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class BC (Instruction_B, po=16, aa=0, lk=0): pass
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class BCA (Instruction_B, po=16, aa=1, lk=0): pass
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class BCL (Instruction_B, po=16, aa=0, lk=1): pass
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class BCLA (Instruction_B, po=16, aa=1, lk=1): pass
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class BCLR (Instruction_XL_b, po=19, xo= 16, lk=0): pass
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class BCLRL (Instruction_XL_b, po=19, xo= 16, lk=1): pass
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class BCCTR (Instruction_XL_b, po=19, xo=528, lk=0): pass
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class BCCTRL (Instruction_XL_b, po=19, xo=528, lk=1): pass
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class BCTAR (Instruction_XL_b, po=19, xo=560, lk=0): pass
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class BCTARL (Instruction_XL_b, po=19, xo=560, lk=1): pass
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