Sprinter/mame
2
0
Fork 0
mirror of https://github.com/holub/mame synced 2025-04-24 17:30:55 +03:00
Code Issues Actions 1 Packages Projects Releases Wiki Activity

memory: Stop being stupid and call the extremely well written

Browse Source 
populate_range_mirrored code through map_range when appropriate, which
is most of the time.  [O. Galibert]
This commit is contained in:
Olivier Galibert 2011-06-10 17:50:01 +00:00
parent 3e62b314df
commit e072ccc0f2
1 changed files with 41 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

45
src/emu/memory.c
View File

@ -878,6 +878,8 @@ private:
UINT8 handler_free;
UINT8 get_free_handler();
void verify_reference_counts();
void setup_range_solid(offs_t addrstart, offs_t addrend, offs_t addrmask, offs_t addrmirror, std::list<UINT32> &entries);
void setup_range_masked(offs_t addrstart, offs_t addrend, offs_t addrmask, offs_t addrmirror, UINT64 mask, std::list<UINT32> &entries);
void handler_ref(UINT8 entry, int count)
{
@ -3302,6 +3304,41 @@ UINT8 address_table::get_free_handler()
// it
//-------------------------------------------------
void address_table::setup_range(offs_t addrstart, offs_t addrend, offs_t addrmask, offs_t addrmirror, UINT64 mask, std::list<UINT32> &entries)
{
// Careful, you can't shift by 64 or more
UINT64 testmask = (1ULL << (m_space.data_width()-1) << 1) - 1;
if((mask & testmask) == 0 || (mask & testmask) == mask)
setup_range_solid(addrstart, addrend, addrmask, addrmirror, entries);
else
setup_range_masked(addrstart, addrend, addrmask, addrmirror, mask, entries);
}
//-------------------------------------------------
// setup_range_solid - finds an appropriate handler
// entry and requests to populate the address map with
// it. Replace what's there.
//-------------------------------------------------
void address_table::setup_range_solid(offs_t addrstart, offs_t addrend, offs_t addrmask, offs_t addrmirror, std::list<UINT32> &entries)
{
// Grab a free entry
UINT8 entry = get_free_handler();
// Add it in the "to be setup" list
entries.push_back(entry);
// Configure and map it
map_range(addrstart, addrend, addrmask, addrmirror, entry);
}
//-------------------------------------------------
// setup_range_solid - finds an appropriate handler
// entry and requests to populate the address map with
// it. Handle non-overlapping subunits.
//-------------------------------------------------
namespace {
struct subrange {
offs_t start, end;
@ -3309,7 +3346,7 @@ namespace {
};
};
void address_table::setup_range(offs_t addrstart, offs_t addrend, offs_t addrmask, offs_t addrmirror, UINT64 mask, std::list<UINT32> &entries)
void address_table::setup_range_masked(offs_t addrstart, offs_t addrend, offs_t addrmask, offs_t addrmirror, UINT64 mask, std::list<UINT32> &entries)
{
// convert addresses to bytes
offs_t bytestart = addrstart;
@ -3319,9 +3356,9 @@ void address_table::setup_range(offs_t addrstart, offs_t addrend, offs_t addrmas
m_space.adjust_addresses(bytestart, byteend, bytemask, bytemirror);
// Validity checks
assert_always(addrstart <= addrend, "address_table::map_range called with start greater than end");
assert_always((bytestart & (m_space.data_width() / 8 - 1)) == 0, "address_table::map_range called with misaligned start address");
assert_always((byteend & (m_space.data_width() / 8 - 1)) == (m_space.data_width() / 8 - 1), "address_table::map_range called with misaligned end address");
assert_always(addrstart <= addrend, "address_table::setup_range called with start greater than end");
assert_always((bytestart & (m_space.data_width() / 8 - 1)) == 0, "address_table::setup_range called with misaligned start address");
assert_always((byteend & (m_space.data_width() / 8 - 1)) == (m_space.data_width() / 8 - 1), "address_table::setup_range called with misaligned end address");
// Scan the memory to see what has to be done
std::list<subrange> range_override;