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/machine/mc68328.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/machine/mc68328.cpp')
-rw-r--r-- | src/devices/machine/mc68328.cpp | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/src/devices/machine/mc68328.cpp b/src/devices/machine/mc68328.cpp index 4b9e9a8b97e..3df500d2f0c 100644 --- a/src/devices/machine/mc68328.cpp +++ b/src/devices/machine/mc68328.cpp @@ -3043,7 +3043,6 @@ uint16_t mc68328_device::internal_read(offs_t offset, uint16_t mem_mask) /* THIS IS PRETTY MUCH TOTALLY WRONG AND DOESN'T REFLECT THE MC68328'S INTERNAL FUNCTIONALITY AT ALL! */ uint32_t mc68328_device::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { - auto mcache = space(AS_PROGRAM).cache<1, 0, ENDIANNESS_BIG>(); uint32_t vram_addr = m_regs.lssa & 0x00fffffe; uint16_t word; uint16_t *line; @@ -3057,7 +3056,7 @@ uint32_t mc68328_device::screen_update(screen_device &screen, bitmap_ind16 &bitm for (x = 0; x < 160; x += 16, vram_addr += 2) { - word = mcache->read_word(vram_addr); + word = space(AS_PROGRAM).read_word(vram_addr); for (b = 0; b < 16; b++) { line[x + b] = (word >> (15 - b)) & 0x0001; |