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| author | Gabe Black <gabeblack@google.com> | 2017-12-04 18:30:41 -0800 |
|---|---|---|
| committer | Gabe Black <gabeblack@google.com> | 2017-12-05 23:48:57 +0000 |
| commit | 855660f9c7588497bdda6807064217e289d65f69 (patch) | |
| tree | f45ff73ea487d3294992b010c37300c31edd447d | |
| parent | f19bb4e88da6ea440db9ca1ce6e2ec1a446ed21c (diff) | |
| download | gem5-855660f9c7588497bdda6807064217e289d65f69.tar.xz | |
x86: LOOP's operand size defaults to 64 bits in 64 bit mode.
The microcode for those instructions needs a directive which overrides
that setting in the instructions emulation environment.
Reported-by: Matt Sinclair <mattdsinclair@gmail.com>
Change-Id: I474d938c0b3cf01da92ec817a58b08de783f1967
Reviewed-on: https://gem5-review.googlesource.com/6301
Reviewed-by: Gabe Black <gabeblack@google.com>
Maintainer: Gabe Black <gabeblack@google.com>
| -rw-r--r-- | src/arch/x86/isa/insts/general_purpose/control_transfer/loop.py | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/arch/x86/isa/insts/general_purpose/control_transfer/loop.py b/src/arch/x86/isa/insts/general_purpose/control_transfer/loop.py index 55c1a7fea..919551e77 100644 --- a/src/arch/x86/isa/insts/general_purpose/control_transfer/loop.py +++ b/src/arch/x86/isa/insts/general_purpose/control_transfer/loop.py @@ -37,18 +37,24 @@ microcode = ''' def macroop LOOP_I { + # Make the default data size of pops 64 bits in 64 bit mode + .adjust_env oszIn64Override rdip t1 subi rcx, rcx, 1, flags=(EZF,), dataSize=asz wripi t1, imm, flags=(nCEZF,) }; def macroop LOOPNE_I { + # Make the default data size of pops 64 bits in 64 bit mode + .adjust_env oszIn64Override rdip t1 subi rcx, rcx, 1, flags=(EZF,), dataSize=asz wripi t1, imm, flags=(CSTRnZnEZF,) }; def macroop LOOPE_I { + # Make the default data size of pops 64 bits in 64 bit mode + .adjust_env oszIn64Override rdip t1 subi rcx, rcx, 1, flags=(EZF,), dataSize=asz wripi t1, imm, flags=(CSTRZnEZF,) |