Interrupt handling in out-of-order execution processors requires complex
hardware schemes to maintain the sequential state. The amount of hardware will
be substantial in VLIW architectures due to the nature of issuing a very large
number of instructions in each cycle. It is hard to implement precise
interrupts in out-of-order execution machines, especially in VLIW processors.
In this paper, we will apply the reorder buffer with future file and the
history buffer methods to a VLIW platform, and present a novel scheme, called
the Current-State Buffer, which employs modest hardware with  compiler support.
Unlike the other interrupt handling schemes, the Current-State Buffer does not
keep history state, result buffering or bypass mechanisms. It is a fast
interrupt handling scheme with a relatively small buffer that records the
execution and exception status of operations. It is suitable for embedded
processors that require a fast interrupt handling mechanism with modest
hardware.

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The author's web site:

<a href="http://www.ece.ncsu.edu/tinker/">www.ece.ncsu.edu/tinker/</a>