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| author | Gabe Black <gblack@eecs.umich.edu> | 2007-10-21 18:44:50 -0700 |
|---|---|---|
| committer | Gabe Black <gblack@eecs.umich.edu> | 2007-10-21 18:44:50 -0700 |
| commit | 4d15e4cf7b2c8eb1f2232e0cbcd09893e9cb9500 (patch) | |
| tree | dcc029105a1066916a0734928092fc0f6da1eadf | |
| parent | d8494325f07695e810e51dffbf9daf5145b10d1a (diff) | |
| download | gem5-4d15e4cf7b2c8eb1f2232e0cbcd09893e9cb9500.tar.xz | |
X86: Implement the stupd microop ("store with update", not "stupid") and use it in ENTER.
--HG--
extra : convert_revision : 9151f701162d31ef26298497467c42b7b0ed85d5
| -rw-r--r-- | src/arch/x86/isa/insts/general_purpose/data_transfer/stack_operations.py | 9 | ||||
| -rw-r--r-- | src/arch/x86/isa/microops/ldstop.isa | 5 |
2 files changed, 8 insertions, 6 deletions
diff --git a/src/arch/x86/isa/insts/general_purpose/data_transfer/stack_operations.py b/src/arch/x86/isa/insts/general_purpose/data_transfer/stack_operations.py index 4c4aec000..3ed9d8bff 100644 --- a/src/arch/x86/isa/insts/general_purpose/data_transfer/stack_operations.py +++ b/src/arch/x86/isa/insts/general_purpose/data_transfer/stack_operations.py @@ -169,8 +169,7 @@ def macroop ENTER_I_I { # t1 is now the masked nesting level, and t2 is the amount of storage. # Push rbp. - st rbp, ss, [1, t0, rsp], "-env.dataSize" - subi rsp, rsp, dsz + stupd rbp, ss, [1, t0, rsp], "-env.dataSize" # Save the stack pointer for later mov t6, t6, rsp @@ -186,8 +185,7 @@ def macroop ENTER_I_I { limm t4, "ULL(-1)", dataSize=8 topOfLoop: ld t5, ss, [dsz, t4, rbp] - st t5, ss, [1, t0, rsp], "-env.dataSize" - subi rsp, rsp, dsz + stupd t5, ss, [1, t0, rsp], "-env.dataSize" # If we're not done yet, loop subi t4, t4, 1, dataSize=8 @@ -196,8 +194,7 @@ topOfLoop: bottomOfLoop: # Push the old rbp onto the stack - st t6, ss, [1, t0, rsp], "-env.dataSize" - subi rsp, rsp, dsz + stupd t6, ss, [1, t0, rsp], "-env.dataSize" skipLoop: sub rsp, rsp, t2 diff --git a/src/arch/x86/isa/microops/ldstop.isa b/src/arch/x86/isa/microops/ldstop.isa index 32fefb5fa..c9ace4790 100644 --- a/src/arch/x86/isa/microops/ldstop.isa +++ b/src/arch/x86/isa/microops/ldstop.isa @@ -422,6 +422,11 @@ let {{ defineMicroStoreOp('St', 'Mem = Data;') defineMicroStoreOp('Stfp', 'Mem = FpData.uqw;') + defineMicroStoreOp('Stupd', ''' + Mem = Data; + Base = merge(Base, EA - SegBase, addressSize); + '''); + iop = InstObjParams("lea", "Lea", 'X86ISA::LdStOp', {"code": "Data = merge(Data, EA, dataSize);", |