diff options
| -rw-r--r-- | src/arch/x86/isa/insts/general_purpose/semaphores.py | 134 |
1 files changed, 40 insertions, 94 deletions
diff --git a/src/arch/x86/isa/insts/general_purpose/semaphores.py b/src/arch/x86/isa/insts/general_purpose/semaphores.py index 2bdbd0ada..b3c0d21cb 100644 --- a/src/arch/x86/isa/insts/general_purpose/semaphores.py +++ b/src/arch/x86/isa/insts/general_purpose/semaphores.py @@ -98,100 +98,6 @@ def macroop CMPXCHG_LOCKED_P_R { mov rax, rax, t1, flags=(nCZF,) }; -def macroop CMPXCHG8B_M { - lea t1, seg, sib, disp, dataSize=asz - ldst t2, seg, [1, t0, t1], 0 - ldst t3, seg, [1, t0, t1], dsz - - sub t0, rax, t2, flags=(ZF,) - br label("doneComparing"), flags=(nCZF,) - sub t0, rdx, t3, flags=(ZF,) -doneComparing: - - # If they're equal, set t3:t2 to rbx:rcx to write to memory - mov t2, t2, rbx, flags=(CZF,) - mov t3, t3, rcx, flags=(CZF,) - - # If they're not equal, set rdx:rax to the value from memory. - mov rax, rax, t2, flags=(nCZF,) - mov rdx, rdx, t3, flags=(nCZF,) - - # Write to memory - st t3, seg, [1, t0, t1], dsz - st t2, seg, [1, t0, t1], 0 -}; - -def macroop CMPXCHG8B_P { - rdip t7 - lea t1, seg, riprel, disp, dataSize=asz - ldst t2, seg, [1, t0, t1], 0 - ldst t3, seg, [1, t0, t1], dsz - - sub t0, rax, t2, flags=(ZF,) - br label("doneComparing"), flags=(nCZF,) - sub t0, rdx, t3, flags=(ZF,) -doneComparing: - - # If they're equal, set t3:t2 to rbx:rcx to write to memory - mov t2, t2, rbx, flags=(CZF,) - mov t3, t3, rcx, flags=(CZF,) - - # If they're not equal, set rdx:rax to the value from memory. - mov rax, rax, t2, flags=(nCZF,) - mov rdx, rdx, t3, flags=(nCZF,) - - # Write to memory - st t3, seg, [1, t0, t1], dsz - st t2, seg, [1, t0, t1], 0 -}; - -def macroop CMPXCHG8B_LOCKED_M { - lea t1, seg, sib, disp, dataSize=asz - ldstl t2, seg, [1, t0, t1], 0 - ldstl t3, seg, [1, t0, t1], dsz - - sub t0, rax, t2, flags=(ZF,) - br label("doneComparing"), flags=(nCZF,) - sub t0, rdx, t3, flags=(ZF,) -doneComparing: - - # If they're equal, set t3:t2 to rbx:rcx to write to memory - mov t2, t2, rbx, flags=(CZF,) - mov t3, t3, rcx, flags=(CZF,) - - # If they're not equal, set rdx:rax to the value from memory. - mov rax, rax, t2, flags=(nCZF,) - mov rdx, rdx, t3, flags=(nCZF,) - - # Write to memory - stul t3, seg, [1, t0, t1], dsz - stul t2, seg, [1, t0, t1], 0 -}; - -def macroop CMPXCHG8B_LOCKED_P { - rdip t7 - lea t1, seg, riprel, disp, dataSize=asz - ldstl t2, seg, [1, t0, t1], 0 - ldstl t3, seg, [1, t0, t1], dsz - - sub t0, rax, t2, flags=(ZF,) - br label("doneComparing"), flags=(nCZF,) - sub t0, rdx, t3, flags=(ZF,) -doneComparing: - - # If they're equal, set t3:t2 to rbx:rcx to write to memory - mov t2, t2, rbx, flags=(CZF,) - mov t3, t3, rcx, flags=(CZF,) - - # If they're not equal, set rdx:rax to the value from memory. - mov rax, rax, t2, flags=(nCZF,) - mov rdx, rdx, t3, flags=(nCZF,) - - # Write to memory - stul t3, seg, [1, t0, t1], dsz - stul t2, seg, [1, t0, t1], 0 -}; - def macroop XADD_M_R { ldst t1, seg, sib, disp add t2, t1, reg, flags=(OF,SF,ZF,AF,PF,CF) @@ -229,6 +135,46 @@ def macroop XADD_R_R { }; ''' + +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 + + sub t0, rax, t2, flags=(ZF,) + br label("doneComparing"), flags=(nCZF,) + sub t0, rdx, t3, flags=(ZF,) +doneComparing: + + # If they're equal, set t3:t2 to rbx:rcx to write to memory + mov t2, t2, rbx, flags=(CZF,) + mov t3, t3, rcx, flags=(CZF,) + + # If they're not equal, set rdx:rax to the value from memory. + mov rax, rax, t2, flags=(nCZF,) + 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 +}; +''' + +microcode += cmpxchg8bCode % {"rdip": "", "sib": "sib", + "l": "", "ul": "", + "suffix": "M"} +microcode += cmpxchg8bCode % {"rdip": "rdip t7", "sib": "riprel", + "l": "", "ul": "", + "suffix": "P"} +microcode += cmpxchg8bCode % {"rdip": "", "sib": "sib", + "l": "l", "ul": "ul", + "suffix": "LOCKED_M"} +microcode += cmpxchg8bCode % {"rdip": "rdip t7", "sib": "riprel", + "l": "l", "ul": "ul", + "suffix": "LOCKED_P"} + #let {{ # class XCHG(Inst): # "GenFault ${new UnimpInstFault}" |