diff options
Diffstat (limited to 'qtmips_asm')
| -rw-r--r-- | qtmips_asm/simpleasm.cpp | 170 |
1 files changed, 134 insertions, 36 deletions
diff --git a/qtmips_asm/simpleasm.cpp b/qtmips_asm/simpleasm.cpp index 9ff8816..5fe4573 100644 --- a/qtmips_asm/simpleasm.cpp +++ b/qtmips_asm/simpleasm.cpp @@ -102,39 +102,130 @@ void SimpleAsm::setup(machine::MemoryAccess *mem, SymbolTableDb *symtab, bool SimpleAsm::process_line(QString line, QString filename, int line_number, QString *error_ptr) { QString error; - int pos; QString label = ""; - pos = line.indexOf("#"); - if (pos >= 0) - line.truncate(pos); - pos = line.indexOf(";"); - if (pos >= 0) - line.truncate(pos); - pos = line.indexOf("//"); - if (pos >= 0) - line.truncate(pos); - line = line.simplified(); - pos = line.indexOf(":"); - if (pos >= 0) { - label = line.mid(0, pos); - line = line.mid(pos + 1).trimmed(); + QString op = ""; + QStringList operands; + int pos; + bool in_quotes = false; + bool backslash = false; + bool maybe_label = true; + bool final = false; + bool separator; + int token_beg = -1; + int token_last = -1; + int operand_num = -1; + + for (pos = 0; pos <= line.count(); pos++) { + QChar ch = ' '; + if (pos >= line.count()) + final = true; + if (!final) + ch = line.at(pos); + if (!in_quotes) { + if (ch == '#') + final = true; + if (ch == ';') + final = true; + if (ch == '/') { + if (pos + 1 < line.count()) + if (line.at(pos + 1) == '/') + final = true; + } + separator = final || (maybe_label && (ch == ':')) || ((operand_num >= 0) && (ch == ',')); + if (maybe_label && (ch == ':')) { + maybe_label = false; + if (token_beg == -1) { + error = "empty label"; + emit report_message(messagetype::MSG_ERROR, filename, line_number, pos, error, ""); + error_occured = true; + if (error_ptr != nullptr) + *error_ptr = error; + return false; + } + label = line.mid(token_beg, token_last - token_beg + 1); + token_beg = -1; + } else if (((!ch.isSpace() && (token_beg >= 0) && (token_last < pos - 1)) || + final) && (operand_num == -1)) { + maybe_label = false; + if (token_beg != -1) + op = line.mid(token_beg, token_last - token_beg + 1).toUpper(); + token_beg = -1; + operand_num = 0; + if (ch == ',') { + error = "empty first operand"; + emit report_message(messagetype::MSG_ERROR, filename, line_number, pos, error, ""); + error_occured = true; + if (error_ptr != nullptr) + *error_ptr = error; + return false; + } + } else if (separator || final) { + if (token_beg == -1) { + error = "empty operand"; + emit report_message(messagetype::MSG_ERROR, filename, line_number, pos, error, ""); + error_occured = true; + if (error_ptr != nullptr) + *error_ptr = error; + return false; + } + operands.append(line.mid(token_beg, token_last - token_beg + 1)); + token_beg = -1; + operand_num++; + } + if (final) + break; + if (!ch.isSpace() && !separator) { + if (token_beg == -1) + token_beg = pos; + token_last = pos; + } + backslash = false; + if (ch == '"') { + if (operand_num == -1) { + error = "unexpected quoted text"; + emit report_message(messagetype::MSG_ERROR, filename, line_number, pos, error, ""); + error_occured = true; + if (error_ptr != nullptr) + *error_ptr = error; + return false; + } + in_quotes = true; + } + } else { + token_last = pos; + if (final) { + error = "unterminated quoted text"; + emit report_message(messagetype::MSG_ERROR, filename, line_number, pos, error, ""); + error_occured = true; + if (error_ptr != nullptr) + *error_ptr = error; + return false; + } + if ((ch == '"') && !backslash) + in_quotes = false; + if ((ch == '\\') && !backslash) + backslash = true; + else + backslash = false; + } + } + + if (!label.isEmpty()) { symtab->setSymbol(label, address, 4); } - if (line.isEmpty()) + + if (op.isEmpty()) { + if (operands.count() != 0) { + error = "operands for empty operation"; + emit report_message(messagetype::MSG_ERROR, filename, line_number, 0, error, ""); + error_occured = true; + if (error_ptr != nullptr) + *error_ptr = error; + return false; + } return true; - int k = 0, l; - while (k < line.count()) { - if (!line.at(k).isSpace()) - break; - k++; } - l = k; - while (l < line.count()) { - if (!line.at(l).isLetterOrNumber() && !(line.at(l) == '.')) - break; - l++; - } - QString op = line.mid(k, l - k).toUpper(); + if ((op == ".DATA") || (op == ".TEXT") || (op == ".GLOBL") || (op == ".END") || (op == ".ENT")) { @@ -144,24 +235,30 @@ bool SimpleAsm::process_line(QString line, QString filename, bool ok; fixmatheval::FmeExpression expression; fixmatheval::FmeValue value; - ok = expression.parse(line.mid(op.size()), error); - if (ok) - ok = expression.eval(value, symtab, error); + if (operands.count() != 1) { + error = ".org unexpected number of operands"; + emit report_message(messagetype::MSG_ERROR, filename, line_number, 0, error, ""); + error_occured = true; + if (error_ptr != nullptr) + *error_ptr = error; + return false; + } + ok = expression.parse(operands.at(0), error); if (!ok) { + fatal_occured = true; error = tr("line %1 .orig %2 parse error.") .arg(QString::number(line_number), line); emit report_message(messagetype::MSG_ERROR, filename, line_number, 0, error, ""); error_occured = true; - fatal_occured = true; if (error_ptr != nullptr) *error_ptr = error; return false; } + ok = expression.eval(value, symtab, error); address = value; return true; } if ((op == ".EQU") || (op == ".SET")) { - QStringList operands = line.mid(op.size()).split(","); if ((operands.count() > 2) || (operands.count() < 1)) { error = tr("line %1 .set or .equ incorrect arguments number.") .arg(QString::number(line_number)); @@ -195,7 +292,7 @@ bool SimpleAsm::process_line(QString line, QString filename, return true; } if (op == ".WORD") { - foreach (QString s, line.mid(op.size()).split(",")) { + for (QString s: operands) { s = s.simplified(); std::uint32_t val = 0; int chars_taken; @@ -205,7 +302,7 @@ bool SimpleAsm::process_line(QString line, QString filename, reloc.append(new machine::RelocExpression(address, s, 0, -0xffffffff, 0xffffffff, 0, 32, 0, filename, line_number, 0)); } - if (fatal_occured) + if (!fatal_occured) mem->write_word(address, val); address += 4; } @@ -213,8 +310,9 @@ bool SimpleAsm::process_line(QString line, QString filename, } std::uint32_t inst[2] = {0, 0}; - ssize_t size = machine::Instruction::code_from_string(inst, 8, line, error, + ssize_t size = machine::Instruction::code_from_string(inst, 8, op, operands, error, address, &reloc, filename, line_number, true); + if (size < 0) { error = tr("line %1 instruction %2 parse error - %3.") .arg(QString::number(line_number), line, error); |