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X86: Implement a locking version of CMPXCHG.

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Gabe Black 2009-04-19 04:56:40 -07:00
parent b493906eb9
commit 43f58927d6
1 changed files with 19 additions and 0 deletions
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19
src/arch/x86/isa/insts/general_purpose/semaphores.py
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@ -79,6 +79,25 @@ def macroop CMPXCHG_P_R {
mov rax, rax, t1, flags=(nCZF,)
};
def macroop CMPXCHG_LOCKED_M_R {
ldstl t1, seg, sib, disp
sub t0, rax, t1, flags=(OF, SF, ZF, AF, PF, CF)
mov t1, t1, reg, flags=(CZF,)
stul t1, seg, sib, disp
mov rax, rax, t1, flags=(nCZF,)
};
def macroop CMPXCHG_LOCKED_P_R {
rdip t7
ldstl t1, seg, riprel, disp
sub t0, rax, t1, flags=(OF, SF, ZF, AF, PF, CF)
mov t1, t1, reg, flags=(CZF,)
stul t1, seg, riprel, disp
mov rax, rax, t1, flags=(nCZF,)
};
def macroop XADD_M_R {
ldst t1, seg, sib, disp
add t2, t1, reg, flags=(OF,SF,ZF,AF,PF,CF)