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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/sound/rf5c68.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/sound/rf5c68.cpp')
-rw-r--r--src/devices/sound/rf5c68.cpp11
1 files changed, 5 insertions, 6 deletions
diff --git a/src/devices/sound/rf5c68.cpp b/src/devices/sound/rf5c68.cpp
index 56661d9a6d4..1f1159b0afa 100644
--- a/src/devices/sound/rf5c68.cpp
+++ b/src/devices/sound/rf5c68.cpp
@@ -59,9 +59,8 @@ rf5c164_device::rf5c164_device(const machine_config &mconfig, const char *tag, d
void rf5c68_device::device_start()
{
- m_data = &space(0);
// Find our direct access
- m_cache = space().cache<0, 0, ENDIANNESS_LITTLE>();
+ space(0).cache(m_cache);
m_sample_end_cb.resolve();
/* allocate the stream */
@@ -140,11 +139,11 @@ void rf5c68_device::sound_stream_update(sound_stream &stream, stream_sample_t **
}
/* fetch the sample and handle looping */
- sample = m_cache->read_byte((chan.addr >> 11) & 0xffff);
+ sample = m_cache.read_byte((chan.addr >> 11) & 0xffff);
if (sample == 0xff)
{
chan.addr = chan.loopst << 11;
- sample = m_cache->read_byte((chan.addr >> 11) & 0xffff);
+ sample = m_cache.read_byte((chan.addr >> 11) & 0xffff);
/* if we loop to a loop point, we're effectively dead */
if (sample == 0xff)
@@ -269,7 +268,7 @@ void rf5c68_device::rf5c68_w(offs_t offset, u8 data)
u8 rf5c68_device::rf5c68_mem_r(offs_t offset)
{
- return m_cache->read_byte(m_wbank | offset);
+ return m_cache.read_byte(m_wbank | offset);
}
@@ -279,5 +278,5 @@ u8 rf5c68_device::rf5c68_mem_r(offs_t offset)
void rf5c68_device::rf5c68_mem_w(offs_t offset, u8 data)
{
- m_data->write_byte(m_wbank | offset, data);
+ m_cache.write_byte(m_wbank | offset, data);
}