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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/devices/machine/68307.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/devices/machine/68307.cpp')
-rw-r--r--src/devices/machine/68307.cpp19
1 files changed, 10 insertions, 9 deletions
diff --git a/src/devices/machine/68307.cpp b/src/devices/machine/68307.cpp
index 70992f45b07..7419b58937c 100644
--- a/src/devices/machine/68307.cpp
+++ b/src/devices/machine/68307.cpp
@@ -130,15 +130,16 @@ inline int m68307_cpu_device::calc_cs(offs_t address) const
void m68307_cpu_device::init16_m68307(address_space &space)
{
m_space = &space;
- auto cache = space.cache<1, 0, ENDIANNESS_BIG>();
-
- m_readimm16 = [cache](offs_t address) -> u16 { /* m_m68307_currentcs = calc_cs(address); */ return cache->read_word(address); };
- m_read8 = [this](offs_t address) -> u8 { /* m_m68307_currentcs = calc_cs(address); */ return m_space->read_byte(address); };
- m_read16 = [this](offs_t address) -> u16 { /* m_m68307_currentcs = calc_cs(address); */ return m_space->read_word(address); };
- m_read32 = [this](offs_t address) -> u32 { /* m_m68307_currentcs = calc_cs(address); */ return m_space->read_dword(address); };
- m_write8 = [this](offs_t address, u8 data) { /* m_m68307_currentcs = calc_cs(address); */ m_space->write_byte(address, data); };
- m_write16 = [this](offs_t address, u16 data) { /* m_m68307_currentcs = calc_cs(address); */ m_space->write_word(address, data); };
- m_write32 = [this](offs_t address, u32 data) { /* m_m68307_currentcs = calc_cs(address); */ m_space->write_dword(address, data); };
+ space.cache(m_oprogram16);
+ space.specific(m_program16);
+
+ m_readimm16 = [this](offs_t address) -> u16 { /* m_m68307_currentcs = calc_cs(address); */ return m_oprogram16.read_word(address); };
+ m_read8 = [this](offs_t address) -> u8 { /* m_m68307_currentcs = calc_cs(address); */ return m_program16.read_byte(address); };
+ m_read16 = [this](offs_t address) -> u16 { /* m_m68307_currentcs = calc_cs(address); */ return m_program16.read_word(address); };
+ m_read32 = [this](offs_t address) -> u32 { /* m_m68307_currentcs = calc_cs(address); */ return m_program16.read_dword(address); };
+ m_write8 = [this](offs_t address, u8 data) { /* m_m68307_currentcs = calc_cs(address); */ m_program16.write_byte(address, data); };
+ m_write16 = [this](offs_t address, u16 data) { /* m_m68307_currentcs = calc_cs(address); */ m_program16.write_word(address, data); };
+ m_write32 = [this](offs_t address, u32 data) { /* m_m68307_currentcs = calc_cs(address); */ m_program16.write_dword(address, data); };
}