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[dynarmic] exclude %rbp from regalloc

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Signed-off-by: lizzie <lizzie@eden-emu.dev>
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lizzie 2026-03-19 18:01:48 +00:00 • committed by crueter
parent 8f770618d2
commit bc46b957d6
1 changed files with 2 additions and 1 deletions
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src/dynarmic/src/dynarmic/backend/x64/reg_alloc.cpp
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@ -417,7 +417,8 @@ HostLoc RegAlloc::SelectARegister(std::bitset<32> desired_locations) const noexc
// While R13 and R14 are technically available, we avoid allocating for them // While R13 and R14 are technically available, we avoid allocating for them
// at all costs, because theoretically skipping them is better than spilling // at all costs, because theoretically skipping them is better than spilling
// all over the place - i also fixes bugs with high reg pressure // all over the place - i also fixes bugs with high reg pressure
} else if (i >= HostLoc::R13 && i <= HostLoc::R15) { // %rbp must not be trashed, so skip it as well
} else if (i == HostLoc::RBP || (i >= HostLoc::R13 && i <= HostLoc::R15)) {
// skip, do not touch // skip, do not touch
// Intel recommends to reuse registers as soon as they're overwritable (DO NOT SPILL) // Intel recommends to reuse registers as soon as they're overwritable (DO NOT SPILL)
} else if (loc_info.IsEmpty()) { } else if (loc_info.IsEmpty()) {