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[TSX] Fix XABORT handling 

Break repeat loop after explicit transaction abort.
May have performance consequences.
This commit is contained in:
Nekotekina 2019-10-13 00:02:44 +03:00
parent 1d07c40aa5
commit c4ccac9a9c
1 changed files with 6 additions and 0 deletions
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6
Utilities/JIT.cpp
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@ -205,12 +205,18 @@ void asmjit::build_transaction_enter(asmjit::X86Assembler& c, asmjit::Label fall
}
else
{
// Don't repeat on explicit XABORT instruction (workaround)
c.test(x86::eax, _XABORT_EXPLICIT);
c.jnz(fallback);
// Count an attempt without RETRY flag as 65 normal attempts and continue
c.push(x86::rax);
c.not_(x86::eax);
c.and_(x86::eax, _XABORT_RETRY);
c.shl(x86::eax, 5);
c.add(x86::eax, 1); // eax = RETRY ? 1 : 65
c.add(ctr, x86::rax);
c.pop(x86::rax);
}
c.cmp(ctr, less_than);