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Implementing dcbz.

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This commit is contained in:
Ben Vanik
2015-05-17 16:40:38 -07:00
parent 50b84203c5
commit c1a0f46ea8
10 changed files with 132 additions and 39 deletions
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21
src/xenia/cpu/frontend/ppc_emit_memory.cc
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@@ -984,11 +984,24 @@ XEEMITTER(dcbtst, 0x7C0001EC, X)(PPCHIRBuilder& f, InstrData& i) {
}
XEEMITTER(dcbz, 0x7C0007EC, X)(PPCHIRBuilder& f, InstrData& i) {
// No-op for now.
// TODO(benvanik): use prefetch
// or dcbz128 0x7C2007EC
// XEINSTRNOTIMPLEMENTED();
f.Nop();
// EA <- (RA) + (RB)
// memset(EA & ~31, 0, 32)
Value* ea = CalculateEA_0(f, i.X.RA, i.X.RB);
int block_size;
int address_mask;
if (i.X.RT == 1) {
// dcbz128 - 128 byte set
block_size = 128;
address_mask = ~127;
}
else {
// dcbz - 32 byte set
block_size = 32;
address_mask = ~31;
}
f.Memset(f.And(ea, f.LoadConstant(int64_t(address_mask))),
f.LoadZero(INT8_TYPE), f.LoadConstant(int64_t(block_size)));
return 0;
}