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arm64: Flush only caller-saved regs before calls.

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Unknown W. Brackets 2015-07-03 09:58:56 -07:00
parent 7dbe2821dc
commit 66d85233b9
2 changed files with 7 additions and 3 deletions
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3
Core/MIPS/ARM64/Arm64Asm.cpp
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@ -62,7 +62,8 @@ static const bool enableDebug = false;
// saving them when we call out of the JIT. We will perform regular dynamic register allocation in the rest (x0-x15)
// STATIC ALLOCATION ARM64 (these are all callee-save registers):
// x24 : Down counter
// x23 : Down counter
// x24 : PC save on JR with non-nice delay slot (to be eliminated later?)
// x25 : MSR/MRS temporary (to be eliminated later)
// x26 : JIT base reg
// x27 : MIPS state (Could eliminate by placing the MIPS state right at the memory base)

7
Core/MIPS/ARM64/Arm64RegCache.cpp
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@ -61,8 +61,11 @@ const ARM64Reg *Arm64RegCache::GetMIPSAllocationOrder(int &count) {
}
void Arm64RegCache::FlushBeforeCall() {
// TODO: More optimal
FlushAll();
// These registers are not preserved by function calls.
for (int i = 0; i < 19; ++i) {
FlushArmReg(ARM64Reg(W0 + i));
}
FlushArmReg(W30);
}
bool Arm64RegCache::IsMapped(MIPSGPReg mipsReg) {