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Special casing sldi.

This commit is contained in:
Ben Vanik 2013-12-13 20:11:04 -08:00
parent 24ce893256
commit 69704853a3
1 changed files with 10 additions and 5 deletions
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15
src/alloy/frontend/ppc/ppc_emit_alu.cc
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@ -882,11 +882,16 @@ XEEMITTER(rld, 0x78000000, MDS)(PPCFunctionBuilder& f, InstrData& i) {
uint32_t mb = (i.MD.MB5 << 5) | i.MD.MB; uint32_t mb = (i.MD.MB5 << 5) | i.MD.MB;
uint64_t m = XEMASK(0, mb); uint64_t m = XEMASK(0, mb);
Value* v = f.LoadGPR(i.MD.RT); Value* v = f.LoadGPR(i.MD.RT);
if (sh) { if (mb == 63 - sh) {
v = f.RotateLeft(v, f.LoadConstant((int8_t)sh)); // Shift left.
} v = f.Shl(v, f.LoadConstant((int8_t)sh));
if (m != 0xFFFFFFFFFFFFFFFF) { } else {
v = f.And(v, f.LoadConstant(m)); if (sh) {
v = f.RotateLeft(v, f.LoadConstant((int8_t)sh));
}
if (m != 0xFFFFFFFFFFFFFFFF) {
v = f.And(v, f.LoadConstant(m));
}
} }
if (i.MD.Rc) { if (i.MD.Rc) {
f.UpdateCR(0, v); f.UpdateCR(0, v);