Age | Commit message (Collapse) | Author |
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This patch takes the final step in removing the InOrderCPU from the
tree. Rest in peace.
The MinorCPU is now used to model an in-order microarchitecture, and
long term the MinorCPU will eventually be renamed InOrderCPU.
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The previous patch introduced a RegClass enum to clean
up register classification. The inorder model already
had an equivalent enum (RegType) that was used internally.
This patch replaces RegType with RegClass to get rid
of the now-redundant code.
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this will safeguard future code from trying to remove
from the list twice. That code wouldnt break but would
waste time.
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Sharing the FP value w/the integer values was giving inconsistent results esp. when
their is a 32-bit integer register matched w/a 64-bit float value
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this causes forwarding a bad value register value
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use it in reg. dep. tracking
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- also use "threadId()" instead of readTid() everywhere
- this will help support more complex ISA indexing
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At the same time, rename the trace flags to debug flags since they
have broader usage than simply tracing. This means that
--trace-flags is now --debug-flags and --trace-help is now --debug-help
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cleanup hanging pointers and other cruft in the destructors
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This step makes it easy to replace the accessor functions
(which still access a global variable) with ones that access
per-thread curTick values.
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when insts execute, they mark the time they finish to be used for subsequent isnts
they may need forwarding of data. However, the regdepmap was using the wrong
value to index into the destination operands of the instruction to be forwarded.
Thus, in some cases, we are checking to see if the 3rd destination register
for an instruction is executed at a certain time, when there is only 1 dest. register
valid. Thus, we get a bad, uninitialized time value that will stall forwarding
causing performance loss but still the correct execution.
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This model currently only works in MIPS_SE mode, so it will take some effort
to clean it up and make it generally useful. Hopefully people are willing to
help make that happen!
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