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author | Nilay Vaish <nilay@cs.wisc.edu> | 2011-11-03 22:52:21 -0500 |
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committer | Nilay Vaish <nilay@cs.wisc.edu> | 2011-11-03 22:52:21 -0500 |
commit | 582ea4d5431f9fa9edbeb16835b04171647ea18b (patch) | |
tree | a9a3ae50ff09f7791525cf8313d8afec67f9f3e3 /src/arch/x86/isa/insts/general_purpose/arithmetic/increment_and_decrement.py | |
parent | fb5c095cd53f4f16e139d9e959c41e089ff79896 (diff) | |
download | gem5-582ea4d5431f9fa9edbeb16835b04171647ea18b.tar.xz |
x86: Add microop for fence
This patch adds a new microop for memory barrier. The microop itself does
nothing, but since it is marked as a memory barrier, the O3 CPU should flush
all the pending loads and stores before the fence to the memory system.
Diffstat (limited to 'src/arch/x86/isa/insts/general_purpose/arithmetic/increment_and_decrement.py')
-rw-r--r-- | src/arch/x86/isa/insts/general_purpose/arithmetic/increment_and_decrement.py | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/arch/x86/isa/insts/general_purpose/arithmetic/increment_and_decrement.py b/src/arch/x86/isa/insts/general_purpose/arithmetic/increment_and_decrement.py index f27cd7008..515082d64 100644 --- a/src/arch/x86/isa/insts/general_purpose/arithmetic/increment_and_decrement.py +++ b/src/arch/x86/isa/insts/general_purpose/arithmetic/increment_and_decrement.py @@ -58,17 +58,21 @@ def macroop INC_P def macroop INC_LOCKED_M { + mfence ldstl t1, seg, sib, disp addi t1, t1, 1, flags=(OF, SF, ZF, AF, PF) stul t1, seg, sib, disp + mfence }; def macroop INC_LOCKED_P { rdip t7 + mfence ldstl t1, seg, riprel, disp addi t1, t1, 1, flags=(OF, SF, ZF, AF, PF) stul t1, seg, riprel, disp + mfence }; def macroop DEC_R @@ -93,16 +97,20 @@ def macroop DEC_P def macroop DEC_LOCKED_M { + mfence ldstl t1, seg, sib, disp subi t1, t1, 1, flags=(OF, SF, ZF, AF, PF) stul t1, seg, sib, disp + mfence }; def macroop DEC_LOCKED_P { rdip t7 + mfence ldstl t1, seg, riprel, disp subi t1, t1, 1, flags=(OF, SF, ZF, AF, PF) stul t1, seg, riprel, disp + mfence }; ''' |