const uint8_t* ImmVector::findLastMember() const {
assert(m_length > 0);
// Loop that does basically the same as numStackValues(), except
// stop at the last.
const uint8_t* vec = m_start;
const LocationCode locCode = LocationCode(*vec++);
const int numLocImms = numLocationCodeImms(locCode);
for (int i = 0; i < numLocImms; ++i) {
decodeVariableSizeImm(&vec);
}
for (;;) {
const uint8_t* ret = vec;
MemberCode code = MemberCode(*vec++);
if (memberCodeHasImm(code)) {
decodeMemberCodeImm(&vec, code);
}
if (vec - m_start == m_length) {
return ret;
}
assert(vec - m_start < m_length);
}
NOT_REACHED();
}
std::vector<uchar> read_immvector(AsmState& as, int& stackCount) {
std::vector<uchar> ret;
as.in.skipSpaceTab();
as.in.expect('<');
std::string word;
if (!as.in.readword(word)) {
as.error("expected location code in immediate vector");
}
LocationCode lcode = parseLocationCode(word.c_str());
if (lcode == InvalidLocationCode) {
as.error("expected location code, saw `" + word + "'");
}
ret.push_back(uint8_t(lcode));
if (word[word.size() - 1] == 'L') {
if (as.in.getc() != ':') {
as.error("expected `:' after location code `" + word + "'");
}
}
for (int i = 0; i < numLocationCodeImms(lcode); ++i) {
read_immvector_immediate(as, ret);
}
stackCount = numLocationCodeStackVals(lcode);
// Read all the member entries.
for (;;) {
as.in.skipWhitespace();
if (as.in.peek() == '>') { as.in.getc(); break; }
if (!as.in.readword(word)) {
as.error("expected member code in immediate vector");
}
MemberCode mcode = parseMemberCode(word.c_str());
if (mcode == InvalidMemberCode) {
as.error("unrecognized member code `" + word + "'");
}
ret.push_back(uint8_t(mcode));
if (memberCodeHasImm(mcode)) {
if (as.in.getc() != ':') {
as.error("expected `:' after member code `" + word + "'");
}
read_immvector_immediate(as, ret, mcode);
} else if (mcode != MW) {
++stackCount;
}
}
return ret;
}
std::vector<MVectorItem> getMVector(const Op* opcode) {
auto immVec = getImmVector(opcode);
std::vector<MVectorItem> result;
auto it = immVec.vec();
auto end = it + immVec.size();
// Skip the LocationCode and its immediate
auto const lcode = LocationCode(*it++);
if (numLocationCodeImms(lcode)) decodeVariableSizeImm(&it);
while (it < end) {
auto const mcode = MemberCode(*it++);
auto const imm = memberCodeHasImm(mcode) ? decodeMemberCodeImm(&it, mcode)
: 0;
result.push_back({mcode, imm});
}
return result;
}
