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Implementing rlwimi.

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This commit is contained in:
Ben Vanik
2013-01-29 18:35:51 -08:00
parent 9c86c29140
commit 80d74dbe03
4 changed files with 36 additions and 4 deletions
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23
src/cpu/codegen/emit_alu.cc
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@@ -1207,7 +1207,7 @@ XEEMITTER(rldicrx, 0x78000004, MD )(FunctionGenerator& g, IRBuilder<>& b, I
XEDISASMR(rldimix, 0x7800000C, MD )(InstrData& i, InstrDisasm& d) {
d.Init("rldimi", "Rotate Left Doubleword Immediate then Mask Insert",
i.MD.Rc ? InstrDisasm::kRc : 0);
d.AddRegOperand(InstrRegister::kGPR, i.MD.RA, InstrRegister::kWrite);
d.AddRegOperand(InstrRegister::kGPR, i.MD.RA, InstrRegister::kReadWrite);
d.AddRegOperand(InstrRegister::kGPR, i.MD.RT, InstrRegister::kRead);
d.AddUImmOperand((i.MD.SH5 << 5) | i.MD.SH, 1);
d.AddUImmOperand((i.MD.MB5 << 5) | i.MD.MB, 1);
@@ -1221,7 +1221,7 @@ XEEMITTER(rldimix, 0x7800000C, MD )(FunctionGenerator& g, IRBuilder<>& b, I
XEDISASMR(rlwimix, 0x50000000, M )(InstrData& i, InstrDisasm& d) {
d.Init("rlwimi", "Rotate Left Word Immediate then Mask Insert",
i.M.Rc ? InstrDisasm::kRc : 0);
d.AddRegOperand(InstrRegister::kGPR, i.M.RA, InstrRegister::kWrite);
d.AddRegOperand(InstrRegister::kGPR, i.M.RA, InstrRegister::kReadWrite);
d.AddRegOperand(InstrRegister::kGPR, i.M.RT, InstrRegister::kRead);
d.AddUImmOperand(i.M.SH, 1);
d.AddUImmOperand(i.M.MB, 1);
@@ -1233,8 +1233,23 @@ XEEMITTER(rlwimix, 0x50000000, M )(FunctionGenerator& g, IRBuilder<>& b, I
// r <- ROTL32((RS)[32:63], n)
// m <- MASK(MB+32, ME+32)
// RA <- r&m | (RA)&¬m
XEINSTRNOTIMPLEMENTED();
return 1;
// ROTL32(x, y) = rotl(i64.(x||x), y)
Value* v = b.CreateAnd(g.gpr_value(i.M.RT), UINT32_MAX);
v = b.CreateOr(b.CreateShl(v, 32), v);
// (v << shift) | (v >> (32 - shift));
v = b.CreateOr(b.CreateShl(v, i.M.SH), b.CreateLShr(v, 32 - i.M.SH));
uint64_t m = XEMASK(i.M.MB + 32, i.M.ME + 32);
v = b.CreateAnd(v, m);
v = b.CreateOr(v, b.CreateAnd(g.gpr_value(i.M.RA), ~m));
g.update_gpr_value(i.M.RA, v);
if (i.M.Rc) {
// With cr0 update.
g.update_cr_with_cond(0, v, b.getInt64(0), true);
}
return 0;
}
XEDISASMR(rlwinmx, 0x54000000, M )(InstrData& i, InstrDisasm& d) {