bool debug_view_disasm::recompute(offs_t pc, int startline, int lines)
{
bool changed = false;
const debug_view_disasm_source &source = downcast<const debug_view_disasm_source &>(*m_source);
int char_num = source.is_octal() ? 3 : 2;
// determine how many characters we need for an address and set the divider
m_divider1 = 1 + (source.m_space.logaddrchars()/2*char_num) + 1;
// assume a fixed number of characters for the disassembly
m_divider2 = m_divider1 + 1 + m_dasm_width + 1;
// determine how many bytes we might need to display
int minbytes = source.m_disasmintf->min_opcode_bytes();
int maxbytes = source.m_disasmintf->max_opcode_bytes();
// ensure that the PC is aligned to the minimum opcode size
pc &= ~source.m_space.byte_to_address_end(minbytes - 1);
// set the width of the third column according to display mode
if (m_right_column == DASM_RIGHTCOL_RAW || m_right_column == DASM_RIGHTCOL_ENCRYPTED)
{
int maxbytes_clamped = MIN(maxbytes, DASM_MAX_BYTES);
m_total.x = m_divider2 + 1 + char_num * maxbytes_clamped + (maxbytes_clamped / minbytes - 1) + 1;
}
else if (m_right_column == DASM_RIGHTCOL_COMMENTS)
m_total.x = m_divider2 + 1 + 50; // DEBUG_COMMENT_MAX_LINE_LENGTH
else
m_total.x = m_divider2 + 1;
// allocate address array
m_byteaddress.resize(m_total.y);
// allocate disassembly buffer
m_dasm.resize(m_total.x * m_total.y);
// iterate over lines
int row_width = m_total.x;
for (int line = 0; line < lines; line++)
{
// convert PC to a byte offset
offs_t pcbyte = source.m_space.address_to_byte(pc) & source.m_space.logbytemask();
// save a copy of the previous line as a backup if we're only doing one line
int instr = startline + line;
char *destbuf = &m_dasm[instr * row_width];
char oldbuf[100];
if (lines == 1)
strncpy(oldbuf, destbuf, MIN(sizeof(oldbuf), row_width));
// convert back and set the address of this instruction
m_byteaddress[instr] = pcbyte;
sprintf(&destbuf[0], " %s ", core_i64_format(source.m_space.byte_to_address(pcbyte), source.m_space.logaddrchars()/2*char_num, source.is_octal()));
// make sure we can translate the address, and then disassemble the result
char buffer[100];
int numbytes = 0;
offs_t physpcbyte = pcbyte;
if (debug_cpu_translate(source.m_space, TRANSLATE_FETCH_DEBUG, &physpcbyte))
{
UINT8 opbuf[64], argbuf[64];
// fetch the bytes up to the maximum
for (numbytes = 0; numbytes < maxbytes; numbytes++)
{
opbuf[numbytes] = debug_read_opcode(source.m_decrypted_space, pcbyte + numbytes, 1);
argbuf[numbytes] = debug_read_opcode(source.m_space, pcbyte + numbytes, 1);
}
// disassemble the result
pc += numbytes = source.m_device.debug()->disassemble(buffer, pc & source.m_space.logaddrmask(), opbuf, argbuf) & DASMFLAG_LENGTHMASK;
}
else
strcpy(buffer, "<unmapped>");
// append the disassembly to the buffer
sprintf(&destbuf[m_divider1 + 1], "%-*s ", m_dasm_width, buffer);
// output the right column
if (m_right_column == DASM_RIGHTCOL_RAW || m_right_column == DASM_RIGHTCOL_ENCRYPTED)
{
// get the bytes
numbytes = source.m_space.address_to_byte(numbytes) & source.m_space.logbytemask();
generate_bytes(pcbyte, numbytes, minbytes, &destbuf[m_divider2], row_width - m_divider2, m_right_column == DASM_RIGHTCOL_ENCRYPTED);
}
else if (m_right_column == DASM_RIGHTCOL_COMMENTS)
{
// get and add the comment, if present
offs_t comment_address = source.m_space.byte_to_address(m_byteaddress[instr]);
const char *text = source.m_device.debug()->comment_text(comment_address);
if (text != NULL)
sprintf(&destbuf[m_divider2], "// %.*s", row_width - m_divider2 - 4, text);
}
// see if the line changed at all
if (lines == 1 && strncmp(oldbuf, destbuf, MIN(sizeof(oldbuf), row_width)) != 0)
changed = true;
}
// update opcode base information
m_last_direct_decrypted = source.m_decrypted_space.direct().ptr();
m_last_direct_raw = source.m_space.direct().ptr();
m_last_change_count = source.m_device.debug()->comment_change_count();
// no longer need to recompute
m_recompute = false;
return changed;
}
bool debug_view_disasm::recompute(offs_t pc, int startline, int lines)
{
bool changed = false;
const debug_view_disasm_source &source = downcast<const debug_view_disasm_source &>(*m_source);
const int char_num = source.m_space.is_octal() ? 3 : 2;
// determine how many characters we need for an address and set the divider
m_divider1 = 1 + (source.m_space.logaddrchars()/2*char_num) + 1;
// assume a fixed number of characters for the disassembly
m_divider2 = m_divider1 + 1 + m_dasm_width + 1;
// determine how many bytes we might need to display
const int minbytes = source.m_disasmintf->min_opcode_bytes();
const int maxbytes = source.m_disasmintf->max_opcode_bytes();
// ensure that the PC is aligned to the minimum opcode size
pc &= ~source.m_space.byte_to_address_end(minbytes - 1);
// set the width of the third column according to display mode
if (m_right_column == DASM_RIGHTCOL_RAW || m_right_column == DASM_RIGHTCOL_ENCRYPTED)
{
int const maxbytes_clamped = (std::min)(maxbytes, DASM_MAX_BYTES);
m_total.x = m_divider2 + 1 + char_num * maxbytes_clamped + (maxbytes_clamped / minbytes - 1) + 1;
}
else if (m_right_column == DASM_RIGHTCOL_COMMENTS)
m_total.x = m_divider2 + 1 + 50; // DEBUG_COMMENT_MAX_LINE_LENGTH
else
m_total.x = m_divider2 + 1;
// allocate address array
m_byteaddress.resize(m_total.y);
// allocate disassembly buffer
const auto total_bytes = m_total.x * m_total.y;
m_dasm.clear();
m_dasm.reserve(total_bytes).seekp(total_bytes);
// iterate over lines
for (int line = 0; line < lines; line++)
{
// convert PC to a byte offset
const offs_t pcbyte = source.m_space.address_to_byte(pc) & source.m_space.logbytemask();
// save a copy of the previous line as a backup if we're only doing one line
const auto instr = startline + line;
const auto base = instr * m_total.x;
char oldbuf[100];
if (lines == 1)
std::memcpy(oldbuf, &m_dasm.vec()[base], (std::min<std::size_t>)(sizeof(oldbuf), m_total.x));
// convert back and set the address of this instruction
m_byteaddress[instr] = pcbyte;
m_dasm.clear();
util::stream_format(m_dasm.seekp(base),
source.m_space.is_octal() ? " %0*o " : " %0*X ",
source.m_space.logaddrchars()/2*char_num, source.m_space.byte_to_address(pcbyte));
// make sure we can translate the address, and then disassemble the result
char buffer[100];
int numbytes = 0;
offs_t physpcbyte = pcbyte;
if (source.m_space.device().memory().translate(source.m_space.spacenum(), TRANSLATE_FETCH_DEBUG, physpcbyte))
{
UINT8 opbuf[64], argbuf[64];
// fetch the bytes up to the maximum
for (numbytes = 0; numbytes < maxbytes; numbytes++)
{
opbuf[numbytes] = machine().debugger().cpu().read_opcode(source.m_decrypted_space, pcbyte + numbytes, 1);
argbuf[numbytes] = machine().debugger().cpu().read_opcode(source.m_space, pcbyte + numbytes, 1);
}
// disassemble the result
pc += numbytes = source.m_disasmintf->disassemble(buffer, pc & source.m_space.logaddrmask(), opbuf, argbuf) & DASMFLAG_LENGTHMASK;
}
else
strcpy(buffer, "<unmapped>");
// append the disassembly to the buffer
util::stream_format(m_dasm.seekp(base + m_divider1 + 1), "%2$-*1$.*1$s ", m_dasm_width, buffer);
// output the right column
if (m_right_column == DASM_RIGHTCOL_RAW || m_right_column == DASM_RIGHTCOL_ENCRYPTED)
{
// get the bytes
numbytes = source.m_space.address_to_byte(numbytes) & source.m_space.logbytemask();
m_dasm.seekp(base + m_divider2);
generate_bytes(pcbyte, numbytes, minbytes, m_total.x - m_divider2, m_right_column == DASM_RIGHTCOL_ENCRYPTED);
}
else if (m_right_column == DASM_RIGHTCOL_COMMENTS)
{
// get and add the comment, if present
const offs_t comment_address = source.m_space.byte_to_address(m_byteaddress[instr]);
const char *const text = source.device()->debug()->comment_text(comment_address);
if (text != nullptr)
util::stream_format(m_dasm.seekp(base + m_divider2), "// %.*s", m_total.x - m_divider2 - 4, text);
}
m_dasm.put('\0');
// see if the line changed at all
if (lines == 1 && strncmp(oldbuf, &m_dasm.vec()[base], (std::min<std::size_t>)(sizeof(oldbuf), m_total.x)) != 0)
changed = true;
}
// update opcode base information
m_last_direct_decrypted = source.m_decrypted_space.direct().ptr();
m_last_direct_raw = source.m_space.direct().ptr();
m_last_change_count = source.device()->debug()->comment_change_count();
// no longer need to recompute
m_recompute = false;
return changed;
}
