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/m6502/r65c19.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/m6502/r65c19.cpp')
-rw-r--r-- | src/devices/cpu/m6502/r65c19.cpp | 24 |
1 files changed, 12 insertions, 12 deletions
diff --git a/src/devices/cpu/m6502/r65c19.cpp b/src/devices/cpu/m6502/r65c19.cpp index 4da7a547c79..0616a432504 100644 --- a/src/devices/cpu/m6502/r65c19.cpp +++ b/src/devices/cpu/m6502/r65c19.cpp @@ -108,9 +108,9 @@ device_memory_interface::space_config_vector c39_device::memory_space_config() c void c39_device::device_start() { std::unique_ptr<mi_banked> intf = std::make_unique<mi_banked>(); - intf->exp = &space(AS_DATA); - intf->escache = space(AS_DATA).cache<0, 0, ENDIANNESS_LITTLE>(); - intf->es4 = &space(AS_IO); + space(AS_DATA).cache(intf->escache); + space(AS_DATA).specific(intf->exp); + space(AS_IO).specific(intf->es4); save_item(NAME(intf->bsr)); save_item(NAME(intf->pbs)); @@ -186,38 +186,38 @@ void r65c19_device::cir_w(u8 data) u8 c39_device::mi_banked::exp_read(u16 adr) { - return exp->read_byte(u32(bsr[(adr & 0xe000) >> 13]) << 13 | (adr & 0x1fff)); + return exp.read_byte(u32(bsr[(adr & 0xe000) >> 13]) << 13 | (adr & 0x1fff)); } u8 c39_device::mi_banked::exp_read_cached(u16 adr) { - return escache->read_byte(u32(bsr[(adr & 0xe000) >> 13]) << 13 | (adr & 0x1fff)); + return escache.read_byte(u32(bsr[(adr & 0xe000) >> 13]) << 13 | (adr & 0x1fff)); } void c39_device::mi_banked::exp_write(u16 adr, u8 val) { - exp->write_byte(u32(bsr[(adr & 0xe000) >> 13]) << 13 | (adr & 0x1fff), val); + exp.write_byte(u32(bsr[(adr & 0xe000) >> 13]) << 13 | (adr & 0x1fff), val); } u8 c39_device::mi_banked::es4_read(u16 adr) { - return es4->read_byte(adr & 0x1ff); + return es4.read_byte(adr & 0x1ff); } void c39_device::mi_banked::es4_write(u16 adr, u8 val) { - es4->write_byte(adr & 0x1ff, val); + es4.write_byte(adr & 0x1ff, val); } u8 c39_device::mi_banked::read(u16 adr) { - return program->read_byte(adr); + return program.read_byte(adr); } u8 c39_device::mi_banked::read_sync(u16 adr) { if (adr < 0x0600) - return cache->read_byte(adr); + return cprogram.read_byte(adr); else if (adr >= 0x0800 || BIT(pbs, 1)) return exp_read_cached(adr); else @@ -227,7 +227,7 @@ u8 c39_device::mi_banked::read_sync(u16 adr) u8 c39_device::mi_banked::read_arg(u16 adr) { if (adr < 0x0600) - return cache->read_byte(adr); + return cprogram.read_byte(adr); else if (adr >= 0x0800 || BIT(pbs, 1)) return exp_read_cached(adr); else @@ -236,7 +236,7 @@ u8 c39_device::mi_banked::read_arg(u16 adr) void c39_device::mi_banked::write(u16 adr, u8 val) { - program->write_byte(adr, val); + program.write_byte(adr, val); } u8 c39_device::pbs_r() |