X86: Turn the CMPXCHG8B microcode into a template and generate each variant.
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1 changed files with 40 additions and 94 deletions
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@ -98,100 +98,6 @@ def macroop CMPXCHG_LOCKED_P_R {
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mov rax, rax, t1, flags=(nCZF,)
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};
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def macroop CMPXCHG8B_M {
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lea t1, seg, sib, disp, dataSize=asz
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ldst t2, seg, [1, t0, t1], 0
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ldst t3, seg, [1, t0, t1], dsz
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sub t0, rax, t2, flags=(ZF,)
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br label("doneComparing"), flags=(nCZF,)
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sub t0, rdx, t3, flags=(ZF,)
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doneComparing:
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# If they're equal, set t3:t2 to rbx:rcx to write to memory
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mov t2, t2, rbx, flags=(CZF,)
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mov t3, t3, rcx, flags=(CZF,)
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# If they're not equal, set rdx:rax to the value from memory.
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mov rax, rax, t2, flags=(nCZF,)
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mov rdx, rdx, t3, flags=(nCZF,)
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# Write to memory
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st t3, seg, [1, t0, t1], dsz
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st t2, seg, [1, t0, t1], 0
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};
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def macroop CMPXCHG8B_P {
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rdip t7
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lea t1, seg, riprel, disp, dataSize=asz
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ldst t2, seg, [1, t0, t1], 0
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ldst t3, seg, [1, t0, t1], dsz
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sub t0, rax, t2, flags=(ZF,)
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br label("doneComparing"), flags=(nCZF,)
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sub t0, rdx, t3, flags=(ZF,)
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doneComparing:
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# If they're equal, set t3:t2 to rbx:rcx to write to memory
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mov t2, t2, rbx, flags=(CZF,)
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mov t3, t3, rcx, flags=(CZF,)
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# If they're not equal, set rdx:rax to the value from memory.
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mov rax, rax, t2, flags=(nCZF,)
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mov rdx, rdx, t3, flags=(nCZF,)
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# Write to memory
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st t3, seg, [1, t0, t1], dsz
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st t2, seg, [1, t0, t1], 0
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};
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def macroop CMPXCHG8B_LOCKED_M {
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lea t1, seg, sib, disp, dataSize=asz
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ldstl t2, seg, [1, t0, t1], 0
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ldstl t3, seg, [1, t0, t1], dsz
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sub t0, rax, t2, flags=(ZF,)
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br label("doneComparing"), flags=(nCZF,)
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sub t0, rdx, t3, flags=(ZF,)
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doneComparing:
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# If they're equal, set t3:t2 to rbx:rcx to write to memory
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mov t2, t2, rbx, flags=(CZF,)
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mov t3, t3, rcx, flags=(CZF,)
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# If they're not equal, set rdx:rax to the value from memory.
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mov rax, rax, t2, flags=(nCZF,)
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mov rdx, rdx, t3, flags=(nCZF,)
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# Write to memory
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stul t3, seg, [1, t0, t1], dsz
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stul t2, seg, [1, t0, t1], 0
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};
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def macroop CMPXCHG8B_LOCKED_P {
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rdip t7
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lea t1, seg, riprel, disp, dataSize=asz
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ldstl t2, seg, [1, t0, t1], 0
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ldstl t3, seg, [1, t0, t1], dsz
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sub t0, rax, t2, flags=(ZF,)
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br label("doneComparing"), flags=(nCZF,)
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sub t0, rdx, t3, flags=(ZF,)
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doneComparing:
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# If they're equal, set t3:t2 to rbx:rcx to write to memory
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mov t2, t2, rbx, flags=(CZF,)
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mov t3, t3, rcx, flags=(CZF,)
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# If they're not equal, set rdx:rax to the value from memory.
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mov rax, rax, t2, flags=(nCZF,)
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mov rdx, rdx, t3, flags=(nCZF,)
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# Write to memory
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stul t3, seg, [1, t0, t1], dsz
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stul t2, seg, [1, t0, t1], 0
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};
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def macroop XADD_M_R {
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ldst t1, seg, sib, disp
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add t2, t1, reg, flags=(OF,SF,ZF,AF,PF,CF)
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@ -229,6 +135,46 @@ def macroop XADD_R_R {
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};
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'''
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cmpxchg8bCode = '''
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def macroop CMPXCHG8B_%(suffix)s {
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%(rdip)s
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lea t1, seg, %(sib)s, disp, dataSize=asz
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ldst%(l)s t2, seg, [1, t0, t1], 0
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ldst%(l)s t3, seg, [1, t0, t1], dsz
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sub t0, rax, t2, flags=(ZF,)
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br label("doneComparing"), flags=(nCZF,)
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sub t0, rdx, t3, flags=(ZF,)
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doneComparing:
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# If they're equal, set t3:t2 to rbx:rcx to write to memory
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mov t2, t2, rbx, flags=(CZF,)
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mov t3, t3, rcx, flags=(CZF,)
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# If they're not equal, set rdx:rax to the value from memory.
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mov rax, rax, t2, flags=(nCZF,)
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mov rdx, rdx, t3, flags=(nCZF,)
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# Write to memory
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st%(ul)s t3, seg, [1, t0, t1], dsz
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st%(ul)s t2, seg, [1, t0, t1], 0
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};
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'''
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microcode += cmpxchg8bCode % {"rdip": "", "sib": "sib",
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"l": "", "ul": "",
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"suffix": "M"}
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microcode += cmpxchg8bCode % {"rdip": "rdip t7", "sib": "riprel",
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"l": "", "ul": "",
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"suffix": "P"}
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microcode += cmpxchg8bCode % {"rdip": "", "sib": "sib",
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"l": "l", "ul": "ul",
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"suffix": "LOCKED_M"}
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microcode += cmpxchg8bCode % {"rdip": "rdip t7", "sib": "riprel",
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"l": "l", "ul": "ul",
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"suffix": "LOCKED_P"}
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#let {{
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# class XCHG(Inst):
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# "GenFault ${new UnimpInstFault}"
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