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Comment fixes.

This commit is contained in:
Ben Vanik 2013-12-13 21:20:01 -08:00
parent 69704853a3
commit d1210218ac
1 changed files with 4 additions and 2 deletions
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6
src/alloy/frontend/ppc/ppc_emit_alu.cc
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@ -1050,13 +1050,14 @@ XEEMITTER(slwx, 0x7C000030, X )(PPCFunctionBuilder& f, InstrData& i) {
}
XEEMITTER(srdx, 0x7C000436, X )(PPCFunctionBuilder& f, InstrData& i) {
// n <- (RB)[59:63]
// n <- (RB)[58:63]
// r <- ROTL64((RS), 64-n)
// if (RB)[58] = 0 then
// if (RB)[57] = 0 then
// m <- MASK(n, 63)
// else
// m <- i64.0
// RA <- r & m
// TODO(benvanik): if >3F, zero out the result.
Value* v = f.Shr(f.LoadGPR(i.X.RT), f.LoadGPR(i.X.RB));
f.StoreGPR(i.X.RA, v);
if (i.X.Rc) {
@ -1073,6 +1074,7 @@ XEEMITTER(srwx, 0x7C000430, X )(PPCFunctionBuilder& f, InstrData& i) {
// else
// m <- i64.0
// RA <- r & m
// TODO(benvanik): if >1F, zero out the result.
Value* v = f.Shr(f.Truncate(f.LoadGPR(i.X.RT), INT32_TYPE),
f.LoadGPR(i.X.RB));
v = f.ZeroExtend(v, INT64_TYPE);