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I might have asked you this before. Do the processor designs that are out there 
in the market
have separate condition code register file?


src/cpu/o3/cpu.cc
<http://reviews.gem5.org/r/1988/#comment4413>

    Is this #ifdef required? When NumCCRegs maps to zero, the loop is not 
executed.



src/cpu/o3/cpu.cc
<http://reviews.gem5.org/r/1988/#comment4414>

    Do we use this code? From a cursory look, it seems that this code is 
required for context switching in SE mode. Should we not just drop all of it?


- Nilay Vaish


On Aug. 22, 2013, 12:41 a.m., Steve Reinhardt wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> http://reviews.gem5.org/r/1988/
> -----------------------------------------------------------
> 
> (Updated Aug. 22, 2013, 12:41 a.m.)
> 
> 
> Review request for Default.
> 
> 
> Repository: gem5
> 
> 
> Description
> -------
> 
> Changeset 9851:27064c03d2c8
> ---------------------------
> cpu: add a condition-code register class
> 
> Add a third register class for condition codes,
> in parallel with the integer and FP classes.
> No ISAs use the CC class at this point though.
> 
> 
> Diffs
> -----
> 
>   src/arch/SConscript 1ddfb0679c7569fb56382ac2187d6de038fd6f28 
>   src/arch/alpha/isa.hh 1ddfb0679c7569fb56382ac2187d6de038fd6f28 
>   src/arch/alpha/registers.hh 1ddfb0679c7569fb56382ac2187d6de038fd6f28 
>   src/arch/alpha/utility.cc 1ddfb0679c7569fb56382ac2187d6de038fd6f28 
>   src/arch/arm/insts/static_inst.cc 1ddfb0679c7569fb56382ac2187d6de038fd6f28 
>   src/arch/arm/isa.hh 1ddfb0679c7569fb56382ac2187d6de038fd6f28 
>   src/arch/arm/registers.hh 1ddfb0679c7569fb56382ac2187d6de038fd6f28 
>   src/arch/arm/utility.cc 1ddfb0679c7569fb56382ac2187d6de038fd6f28 
>   src/arch/isa_parser.py 1ddfb0679c7569fb56382ac2187d6de038fd6f28 
>   src/arch/mips/isa.hh 1ddfb0679c7569fb56382ac2187d6de038fd6f28 
>   src/arch/mips/registers.hh 1ddfb0679c7569fb56382ac2187d6de038fd6f28 
>   src/arch/power/insts/static_inst.cc 
> 1ddfb0679c7569fb56382ac2187d6de038fd6f28 
>   src/arch/power/isa.hh 1ddfb0679c7569fb56382ac2187d6de038fd6f28 
>   src/arch/power/registers.hh 1ddfb0679c7569fb56382ac2187d6de038fd6f28 
>   src/arch/power/utility.cc 1ddfb0679c7569fb56382ac2187d6de038fd6f28 
>   src/arch/sparc/isa.hh 1ddfb0679c7569fb56382ac2187d6de038fd6f28 
>   src/arch/sparc/registers.hh 1ddfb0679c7569fb56382ac2187d6de038fd6f28 
>   src/arch/sparc/utility.cc 1ddfb0679c7569fb56382ac2187d6de038fd6f28 
>   src/arch/x86/insts/static_inst.cc 1ddfb0679c7569fb56382ac2187d6de038fd6f28 
>   src/arch/x86/isa.hh 1ddfb0679c7569fb56382ac2187d6de038fd6f28 
>   src/arch/x86/registers.hh 1ddfb0679c7569fb56382ac2187d6de038fd6f28 
>   src/arch/x86/utility.cc 1ddfb0679c7569fb56382ac2187d6de038fd6f28 
>   src/cpu/base_dyn_inst.hh 1ddfb0679c7569fb56382ac2187d6de038fd6f28 
>   src/cpu/checker/cpu.hh 1ddfb0679c7569fb56382ac2187d6de038fd6f28 
>   src/cpu/checker/cpu_impl.hh 1ddfb0679c7569fb56382ac2187d6de038fd6f28 
>   src/cpu/checker/thread_context.hh 1ddfb0679c7569fb56382ac2187d6de038fd6f28 
>   src/cpu/inorder/cpu.hh 1ddfb0679c7569fb56382ac2187d6de038fd6f28 
>   src/cpu/inorder/cpu.cc 1ddfb0679c7569fb56382ac2187d6de038fd6f28 
>   src/cpu/inorder/inorder_dyn_inst.hh 
> 1ddfb0679c7569fb56382ac2187d6de038fd6f28 
>   src/cpu/inorder/inorder_dyn_inst.cc 
> 1ddfb0679c7569fb56382ac2187d6de038fd6f28 
>   src/cpu/inorder/thread_context.hh 1ddfb0679c7569fb56382ac2187d6de038fd6f28 
>   src/cpu/inorder/thread_context.cc 1ddfb0679c7569fb56382ac2187d6de038fd6f28 
>   src/cpu/o3/O3CPU.py 1ddfb0679c7569fb56382ac2187d6de038fd6f28 
>   src/cpu/o3/cpu.hh 1ddfb0679c7569fb56382ac2187d6de038fd6f28 
>   src/cpu/o3/cpu.cc 1ddfb0679c7569fb56382ac2187d6de038fd6f28 
>   src/cpu/o3/dyn_inst.hh 1ddfb0679c7569fb56382ac2187d6de038fd6f28 
>   src/cpu/o3/free_list.hh 1ddfb0679c7569fb56382ac2187d6de038fd6f28 
>   src/cpu/o3/free_list.cc 1ddfb0679c7569fb56382ac2187d6de038fd6f28 
>   src/cpu/o3/inst_queue.hh 1ddfb0679c7569fb56382ac2187d6de038fd6f28 
>   src/cpu/o3/inst_queue_impl.hh 1ddfb0679c7569fb56382ac2187d6de038fd6f28 
>   src/cpu/o3/regfile.hh 1ddfb0679c7569fb56382ac2187d6de038fd6f28 
>   src/cpu/o3/regfile.cc PRE-CREATION 
>   src/cpu/o3/rename_impl.hh 1ddfb0679c7569fb56382ac2187d6de038fd6f28 
>   src/cpu/o3/rename_map.hh 1ddfb0679c7569fb56382ac2187d6de038fd6f28 
>   src/cpu/o3/rename_map.cc 1ddfb0679c7569fb56382ac2187d6de038fd6f28 
>   src/cpu/o3/thread_context.hh 1ddfb0679c7569fb56382ac2187d6de038fd6f28 
>   src/cpu/o3/thread_context_impl.hh 1ddfb0679c7569fb56382ac2187d6de038fd6f28 
>   src/cpu/ozone/cpu_impl.hh 1ddfb0679c7569fb56382ac2187d6de038fd6f28 
>   src/cpu/reg_class.hh PRE-CREATION 
>   src/cpu/reg_class.cc PRE-CREATION 
>   src/cpu/simple/base.hh 1ddfb0679c7569fb56382ac2187d6de038fd6f28 
>   src/cpu/simple/base.cc 1ddfb0679c7569fb56382ac2187d6de038fd6f28 
>   src/cpu/simple_thread.hh 1ddfb0679c7569fb56382ac2187d6de038fd6f28 
>   src/cpu/static_inst.hh 1ddfb0679c7569fb56382ac2187d6de038fd6f28 
>   src/cpu/thread_context.hh 1ddfb0679c7569fb56382ac2187d6de038fd6f28 
>   src/cpu/thread_context.cc 1ddfb0679c7569fb56382ac2187d6de038fd6f28 
> 
> Diff: http://reviews.gem5.org/r/1988/diff/
> 
> 
> Testing
> -------
> 
> 
> Thanks,
> 
> Steve Reinhardt
> 
>

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