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author Olivier Galibert <galibert@pobox.com>2020-05-25 16:42:42 +0200
committer Olivier Galibert <galibert@pobox.com>2020-05-25 16:42:57 +0200
commit22513fb6fe281f5ccb75aaddb6417a12a66c313d (patch)
tree3cf84032cc6482d685a8dbb57e015bd17c7f7fdc /src/emu/dirom.cpp
parente42c2d2874cf9c1092c01ab5ce9ef997d465ce25 (diff)
emumem: A little more speedup. cache and specific change syntax, and are not pointers anymore [O. Galibert]
The last(?) two changes are: - Add a template parameter to everything (theoretically the address space width, in practice a level derived from it to keep as much compatibility between widths as possible) so that the shift size becomes a constant. - Change the syntax of declaring and initializing the caches and specifics so that they're embedded in the owner device. Solves lifetime issues and also removes one indirection (looking up the base dispatch pointer through the cache/specific pointer).
Diffstat (limited to 'src/emu/dirom.cpp')
-rw-r--r--src/emu/dirom.cpp285
1 files changed, 0 insertions, 285 deletions
diff --git a/src/emu/dirom.cpp b/src/emu/dirom.cpp
deleted file mode 100644
index 6440fa2cfc6..00000000000
--- a/src/emu/dirom.cpp
+++ /dev/null
@@ -1,285 +0,0 @@
-// license:BSD-3-Clause
-// copyright-holders:Olivier Galibert
-
-#include "emu.h"
-
-
-device_rom_interface::device_rom_interface(const machine_config &mconfig, device_t &device, u8 addrwidth, endianness_t endian, u8 datawidth) :
- device_memory_interface(mconfig, device),
- m_rom_tag(device.basetag()),
- m_rom_config("rom", endian, datawidth, addrwidth),
- m_bank(nullptr),
- m_cur_bank(-1)
-{
-}
-
-device_rom_interface::~device_rom_interface()
-{
-}
-
-device_memory_interface::space_config_vector device_rom_interface::memory_space_config() const
-{
- return space_config_vector {
- std::make_pair(0, &m_rom_config)
- };
-}
-
-void device_rom_interface::rom_bank_updated()
-{
-}
-
-void device_rom_interface::set_rom_bank(int bank)
-{
- if(!m_bank)
- emu_fatalerror("%s: device_rom_interface::set_rom_bank called without banking setup", device().tag());
-
- if(bank >= m_bank_count) {
- device().logerror("Warning: requested bank %x higher than actual bank count %x\n", bank, m_bank_count);
- bank = bank % m_bank_count;
- }
-
- if (m_cur_bank != bank) {
- m_cur_bank = bank;
- m_bank->set_entry(bank);
- rom_bank_updated();
- }
-}
-
-void device_rom_interface::interface_post_load()
-{
- if(m_bank)
- m_bank->set_entry(m_cur_bank);
-}
-
-void device_rom_interface::set_rom(const void *base, u32 size)
-{
- u32 mend = m_rom_config.addr_width() == 32 ? 0xffffffff : (1 << m_rom_config.addr_width()) - 1;
- u32 rend = size-1;
- m_bank_count = mend == 0xffffffff ? 1 : (rend+1) / (mend+1);
- if(m_bank_count < 1)
- m_bank_count = 1;
-
- if(rend >= mend) {
- space().install_read_bank(0, mend, device().tag());
- m_bank = device().machine().memory().banks().find(device().tag())->second.get();
- m_bank->configure_entries(0, m_bank_count, const_cast<void *>(base), mend+1);
- m_cur_bank = 0;
-
- } else {
- // Round up to the nearest power-of-two-minus-one
- u32 rmask = rend;
- rmask |= rmask >> 1;
- rmask |= rmask >> 2;
- rmask |= rmask >> 4;
- rmask |= rmask >> 8;
- rmask |= rmask >> 16;
- if(rmask != rend)
- space().unmap_read(0, mend);
- // Mirror over the high bits. mend and rmask are both
- // powers-of-two-minus-one, so the xor works
- space().install_rom(0, rend, mend ^ rmask, const_cast<void *>(base));
- }
-}
-
-void device_rom_interface::interface_pre_start()
-{
- if(!has_space(0))
- return;
-
- switch(space().data_width()) {
- case 8:
- if(space().endianness() == ENDIANNESS_LITTLE) {
- auto cache = space().cache<0, 0, ENDIANNESS_LITTLE>();
- m_r8 = [cache] (offs_t byteaddress) -> u8 { return cache->read_byte(byteaddress); };
- m_r16 = [cache] (offs_t byteaddress) -> u16 { return cache->read_word(byteaddress); };
- m_r32 = [cache] (offs_t byteaddress) -> u32 { return cache->read_dword(byteaddress); };
- m_r64 = [cache] (offs_t byteaddress) -> u64 { return cache->read_qword(byteaddress); };
- } else {
- auto cache = space().cache<0, 0, ENDIANNESS_BIG>();
- m_r8 = [cache] (offs_t byteaddress) -> u8 { return cache->read_byte(byteaddress); };
- m_r16 = [cache] (offs_t byteaddress) -> u16 { return cache->read_word(byteaddress); };
- m_r32 = [cache] (offs_t byteaddress) -> u32 { return cache->read_dword(byteaddress); };
- m_r64 = [cache] (offs_t byteaddress) -> u64 { return cache->read_qword(byteaddress); };
- }
- break;
-
- case 16:
- switch(space().addr_shift()) {
- case 3:
- if(space().endianness() == ENDIANNESS_LITTLE) {
- auto cache = space().cache<1, 3, ENDIANNESS_LITTLE>();
- m_r8 = [cache] (offs_t byteaddress) -> u8 { return cache->read_byte(byteaddress); };
- m_r16 = [cache] (offs_t byteaddress) -> u16 { return cache->read_word(byteaddress); };
- m_r32 = [cache] (offs_t byteaddress) -> u32 { return cache->read_dword(byteaddress); };
- m_r64 = [cache] (offs_t byteaddress) -> u64 { return cache->read_qword(byteaddress); };
- } else {
- auto cache = space().cache<1, 3, ENDIANNESS_BIG>();
- m_r8 = [cache] (offs_t byteaddress) -> u8 { return cache->read_byte(byteaddress); };
- m_r16 = [cache] (offs_t byteaddress) -> u16 { return cache->read_word(byteaddress); };
- m_r32 = [cache] (offs_t byteaddress) -> u32 { return cache->read_dword(byteaddress); };
- m_r64 = [cache] (offs_t byteaddress) -> u64 { return cache->read_qword(byteaddress); };
- }
- break;
- case 0:
- if(space().endianness() == ENDIANNESS_LITTLE) {
- auto cache = space().cache<1, 0, ENDIANNESS_LITTLE>();
- m_r8 = [cache] (offs_t byteaddress) -> u8 { return cache->read_byte(byteaddress); };
- m_r16 = [cache] (offs_t byteaddress) -> u16 { return cache->read_word(byteaddress); };
- m_r32 = [cache] (offs_t byteaddress) -> u32 { return cache->read_dword(byteaddress); };
- m_r64 = [cache] (offs_t byteaddress) -> u64 { return cache->read_qword(byteaddress); };
- } else {
- auto cache = space().cache<1, 0, ENDIANNESS_BIG>();
- m_r8 = [cache] (offs_t byteaddress) -> u8 { return cache->read_byte(byteaddress); };
- m_r16 = [cache] (offs_t byteaddress) -> u16 { return cache->read_word(byteaddress); };
- m_r32 = [cache] (offs_t byteaddress) -> u32 { return cache->read_dword(byteaddress); };
- m_r64 = [cache] (offs_t byteaddress) -> u64 { return cache->read_qword(byteaddress); };
- }
- break;
- case -1:
- if(space().endianness() == ENDIANNESS_LITTLE) {
- auto cache = space().cache<1, -1, ENDIANNESS_LITTLE>();
- m_r8 = nullptr;
- m_r16 = nullptr;
- m_r32 = [cache] (offs_t byteaddress) -> u32 { return cache->read_dword(byteaddress); };
- m_r64 = [cache] (offs_t byteaddress) -> u64 { return cache->read_qword(byteaddress); };
- } else {
- auto cache = space().cache<1, -1, ENDIANNESS_BIG>();
- m_r8 = nullptr;
- m_r16 = nullptr;
- m_r32 = [cache] (offs_t byteaddress) -> u32 { return cache->read_dword(byteaddress); };
- m_r64 = [cache] (offs_t byteaddress) -> u64 { return cache->read_qword(byteaddress); };
- }
- break;
- }
- break;
-
- case 32:
- switch(space().addr_shift()) {
- case 0:
- if(space().endianness() == ENDIANNESS_LITTLE) {
- auto cache = space().cache<2, 0, ENDIANNESS_LITTLE>();
- m_r8 = [cache] (offs_t byteaddress) -> u8 { return cache->read_byte(byteaddress); };
- m_r16 = [cache] (offs_t byteaddress) -> u16 { return cache->read_word(byteaddress); };
- m_r32 = [cache] (offs_t byteaddress) -> u32 { return cache->read_dword(byteaddress); };
- m_r64 = [cache] (offs_t byteaddress) -> u64 { return cache->read_qword(byteaddress); };
- } else {
- auto cache = space().cache<2, 0, ENDIANNESS_BIG>();
- m_r8 = [cache] (offs_t byteaddress) -> u8 { return cache->read_byte(byteaddress); };
- m_r16 = [cache] (offs_t byteaddress) -> u16 { return cache->read_word(byteaddress); };
- m_r32 = [cache] (offs_t byteaddress) -> u32 { return cache->read_dword(byteaddress); };
- m_r64 = [cache] (offs_t byteaddress) -> u64 { return cache->read_qword(byteaddress); };
- }
- break;
- case -1:
- if(space().endianness() == ENDIANNESS_LITTLE) {
- auto cache = space().cache<2, -1, ENDIANNESS_LITTLE>();
- m_r8 = nullptr;
- m_r16 = [cache] (offs_t byteaddress) -> u16 { return cache->read_word(byteaddress); };
- m_r32 = [cache] (offs_t byteaddress) -> u32 { return cache->read_dword(byteaddress); };
- m_r64 = [cache] (offs_t byteaddress) -> u64 { return cache->read_qword(byteaddress); };
- } else {
- auto cache = space().cache<2, -1, ENDIANNESS_BIG>();
- m_r8 = nullptr;
- m_r16 = [cache] (offs_t byteaddress) -> u16 { return cache->read_word(byteaddress); };
- m_r32 = [cache] (offs_t byteaddress) -> u32 { return cache->read_dword(byteaddress); };
- m_r64 = [cache] (offs_t byteaddress) -> u64 { return cache->read_qword(byteaddress); };
- }
- break;
- case -2:
- if(space().endianness() == ENDIANNESS_LITTLE) {
- auto cache = space().cache<2, -2, ENDIANNESS_LITTLE>();
- m_r8 = nullptr;
- m_r16 = nullptr;
- m_r32 = [cache] (offs_t byteaddress) -> u32 { return cache->read_dword(byteaddress); };
- m_r64 = [cache] (offs_t byteaddress) -> u64 { return cache->read_qword(byteaddress); };
- } else {
- auto cache = space().cache<2, -2, ENDIANNESS_BIG>();
- m_r8 = nullptr;
- m_r16 = nullptr;
- m_r32 = [cache] (offs_t byteaddress) -> u32 { return cache->read_dword(byteaddress); };
- m_r64 = [cache] (offs_t byteaddress) -> u64 { return cache->read_qword(byteaddress); };
- }
- break;
- }
- break;
-
- case 64:
- switch(space().addr_shift()) {
- case 0:
- if(space().endianness() == ENDIANNESS_LITTLE) {
- auto cache = space().cache<3, 0, ENDIANNESS_LITTLE>();
- m_r8 = [cache] (offs_t byteaddress) -> u8 { return cache->read_byte(byteaddress); };
- m_r16 = [cache] (offs_t byteaddress) -> u16 { return cache->read_word(byteaddress); };
- m_r32 = [cache] (offs_t byteaddress) -> u32 { return cache->read_dword(byteaddress); };
- m_r64 = [cache] (offs_t byteaddress) -> u64 { return cache->read_qword(byteaddress); };
- } else {
- auto cache = space().cache<3, 0, ENDIANNESS_BIG>();
- m_r8 = [cache] (offs_t byteaddress) -> u8 { return cache->read_byte(byteaddress); };
- m_r16 = [cache] (offs_t byteaddress) -> u16 { return cache->read_word(byteaddress); };
- m_r32 = [cache] (offs_t byteaddress) -> u32 { return cache->read_dword(byteaddress); };
- m_r64 = [cache] (offs_t byteaddress) -> u64 { return cache->read_qword(byteaddress); };
- }
- break;
- case -1:
- if(space().endianness() == ENDIANNESS_LITTLE) {
- auto cache = space().cache<3, -1, ENDIANNESS_LITTLE>();
- m_r8 = nullptr;
- m_r16 = [cache] (offs_t byteaddress) -> u16 { return cache->read_word(byteaddress); };
- m_r32 = [cache] (offs_t byteaddress) -> u32 { return cache->read_dword(byteaddress); };
- m_r64 = [cache] (offs_t byteaddress) -> u64 { return cache->read_qword(byteaddress); };
- } else {
- auto cache = space().cache<3, -1, ENDIANNESS_BIG>();
- m_r8 = nullptr;
- m_r16 = [cache] (offs_t byteaddress) -> u16 { return cache->read_word(byteaddress); };
- m_r32 = [cache] (offs_t byteaddress) -> u32 { return cache->read_dword(byteaddress); };
- m_r64 = [cache] (offs_t byteaddress) -> u64 { return cache->read_qword(byteaddress); };
- }
- break;
- case -2:
- if(space().endianness() == ENDIANNESS_LITTLE) {
- auto cache = space().cache<3, -2, ENDIANNESS_LITTLE>();
- m_r8 = nullptr;
- m_r16 = nullptr;
- m_r32 = [cache] (offs_t byteaddress) -> u32 { return cache->read_dword(byteaddress); };
- m_r64 = [cache] (offs_t byteaddress) -> u64 { return cache->read_qword(byteaddress); };
- } else {
- auto cache = space().cache<3, -2, ENDIANNESS_BIG>();
- m_r8 = nullptr;
- m_r16 = nullptr;
- m_r32 = [cache] (offs_t byteaddress) -> u32 { return cache->read_dword(byteaddress); };
- m_r64 = [cache] (offs_t byteaddress) -> u64 { return cache->read_qword(byteaddress); };
- }
- break;
- case -3:
- if(space().endianness() == ENDIANNESS_LITTLE) {
- auto cache = space().cache<3, -3, ENDIANNESS_LITTLE>();
- m_r8 = nullptr;
- m_r16 = nullptr;
- m_r32 = nullptr;
- m_r64 = [cache] (offs_t byteaddress) -> u64 { return cache->read_qword(byteaddress); };
- } else {
- auto cache = space().cache<3, -3, ENDIANNESS_BIG>();
- m_r8 = nullptr;
- m_r16 = nullptr;
- m_r32 = nullptr;
- m_r64 = [cache] (offs_t byteaddress) -> u64 { return cache->read_qword(byteaddress); };
- }
- break;
- }
- break;
- }
-
- device().save_item(NAME(m_cur_bank));
- device().save_item(NAME(m_bank_count));
-
- if(!has_configured_map(0)) {
- memory_region *reg = device().owner()->memregion(m_rom_tag);
- if(reg)
- set_rom(reg->base(), reg->bytes());
- else {
- device().logerror("ROM region '%s' not found\n", m_rom_tag);
- u32 end = m_rom_config.addr_width() == 32 ? 0xffffffff : (1 << m_rom_config.addr_width()) - 1;
- space().unmap_read(0, end);
- }
- }
-}