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14 lines
369 B
Python
14 lines
369 B
Python
3 years ago
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from amaranth import *
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from amaranth.utils import bits_for
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__all__ = ["iea_mask"]
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def iea_mask(addr, msr_sf):
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"Instruction effective address mask. In 32-bit mode (MSR.SF = 0), the upper 32 bits are cleared."
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addr, msr_sf = Value.cast(addr), Value.cast(msr_sf)
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assert len(msr_sf) == 1
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mask = Cat(Repl(1, 32), Repl(msr_sf, 32))
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return addr & mask
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