diff options
Diffstat (limited to 'src/arch/x86/isa/insts')
| -rw-r--r-- | src/arch/x86/isa/insts/general_purpose/semaphores.py | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/src/arch/x86/isa/insts/general_purpose/semaphores.py b/src/arch/x86/isa/insts/general_purpose/semaphores.py index 17bee7fb7..9f751b3ae 100644 --- a/src/arch/x86/isa/insts/general_purpose/semaphores.py +++ b/src/arch/x86/isa/insts/general_purpose/semaphores.py @@ -1,4 +1,5 @@ # Copyright (c) 2007 The Hewlett-Packard Development Company +# Copyright (c) 2015 Advanced Micro Devices, Inc. # All rights reserved. # # The license below extends only to copyright in the software and shall @@ -126,12 +127,14 @@ def macroop XADD_R_R { ''' +# Despite the name, this microcode sequence implements both +# cmpxchg8b and cmpxchg16b, depending on the dynamic value +# of dataSize. cmpxchg8bCode = ''' def macroop CMPXCHG8B_%(suffix)s { %(rdip)s lea t1, seg, %(sib)s, disp, dataSize=asz - ldst%(l)s t2, seg, [1, t0, t1], 0 - ldst%(l)s t3, seg, [1, t0, t1], dsz + ldsplit%(l)s (t2, t3), seg, [1, t0, t1], disp=0 sub t0, rax, t2, flags=(ZF,) br label("doneComparing"), flags=(nCZF,) @@ -147,8 +150,7 @@ doneComparing: mov rdx, rdx, t3, flags=(nCZF,) # Write to memory - st%(ul)s t3, seg, [1, t0, t1], dsz - st%(ul)s t2, seg, [1, t0, t1], 0 + stsplit%(ul)s (t2, t3), seg, [1, t0, t1], disp=0 }; ''' |