diff options
author | 2020-05-25 16:42:42 +0200 | |
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committer | 2020-05-25 16:42:57 +0200 | |
commit | 22513fb6fe281f5ccb75aaddb6417a12a66c313d (patch) | |
tree | 3cf84032cc6482d685a8dbb57e015bd17c7f7fdc /src/devices/cpu/m6809/m6809.cpp | |
parent | e42c2d2874cf9c1092c01ab5ce9ef997d465ce25 (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/cpu/m6809/m6809.cpp')
-rw-r--r-- | src/devices/cpu/m6809/m6809.cpp | 16 |
1 files changed, 7 insertions, 9 deletions
diff --git a/src/devices/cpu/m6809/m6809.cpp b/src/devices/cpu/m6809/m6809.cpp index 5143676fa05..e2a83a17e00 100644 --- a/src/devices/cpu/m6809/m6809.cpp +++ b/src/devices/cpu/m6809/m6809.cpp @@ -156,11 +156,9 @@ void m6809_base_device::device_start() if (!m_mintf) m_mintf = std::make_unique<mi_default>(); - m_mintf->m_program = &space(AS_PROGRAM); - m_mintf->m_sprogram = has_space(AS_OPCODES) ? &space(AS_OPCODES) : m_mintf->m_program; - - m_mintf->m_cache = m_mintf->m_program->cache<0, 0, ENDIANNESS_BIG>(); - m_mintf->m_scache = m_mintf->m_sprogram->cache<0, 0, ENDIANNESS_BIG>(); + space(AS_PROGRAM).cache(m_mintf->cprogram); + space(AS_PROGRAM).specific(m_mintf->program); + space(has_space(AS_OPCODES) ? AS_OPCODES : AS_PROGRAM).cache(m_mintf->csprogram); m_lic_func.resolve_safe(); @@ -581,23 +579,23 @@ void m6809_base_device::execute_run() uint8_t m6809_base_device::mi_default::read(uint16_t adr) { - return m_program->read_byte(adr); + return program.read_byte(adr); } uint8_t m6809_base_device::mi_default::read_opcode(uint16_t adr) { - return m_scache->read_byte(adr); + return csprogram.read_byte(adr); } uint8_t m6809_base_device::mi_default::read_opcode_arg(uint16_t adr) { - return m_cache->read_byte(adr); + return cprogram.read_byte(adr); } void m6809_base_device::mi_default::write(uint16_t adr, uint8_t val) { - m_program->write_byte(adr, val); + program.write_byte(adr, val); } |