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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/cpu/m6502/m6502.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/cpu/m6502/m6502.cpp')
-rw-r--r--src/devices/cpu/m6502/m6502.cpp16
1 files changed, 7 insertions, 9 deletions
diff --git a/src/devices/cpu/m6502/m6502.cpp b/src/devices/cpu/m6502/m6502.cpp
index 2781d689dc1..f3b09d4de78 100644
--- a/src/devices/cpu/m6502/m6502.cpp
+++ b/src/devices/cpu/m6502/m6502.cpp
@@ -44,11 +44,9 @@ void m6502_device::device_start()
void m6502_device::init()
{
- mintf->program = &space(AS_PROGRAM);
- mintf->sprogram = has_space(AS_OPCODES) ? &space(AS_OPCODES) : mintf->program;
-
- mintf->cache = mintf->program->cache<0, 0, ENDIANNESS_LITTLE>();
- mintf->scache = mintf->sprogram->cache<0, 0, ENDIANNESS_LITTLE>();
+ space(AS_PROGRAM).cache(mintf->cprogram);
+ space(AS_PROGRAM).specific(mintf->program);
+ space(has_space(AS_OPCODES) ? AS_OPCODES : AS_PROGRAM).cache(mintf->csprogram);
sync_w.resolve_safe();
@@ -528,22 +526,22 @@ void m6502_device::memory_interface::write_9(uint16_t adr, uint8_t val)
uint8_t m6502_device::mi_default::read(uint16_t adr)
{
- return program->read_byte(adr);
+ return program.read_byte(adr);
}
uint8_t m6502_device::mi_default::read_sync(uint16_t adr)
{
- return scache->read_byte(adr);
+ return csprogram.read_byte(adr);
}
uint8_t m6502_device::mi_default::read_arg(uint16_t adr)
{
- return cache->read_byte(adr);
+ return cprogram.read_byte(adr);
}
void m6502_device::mi_default::write(uint16_t adr, uint8_t val)
{
- program->write_byte(adr, val);
+ program.write_byte(adr, val);
}