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/upd7725/upd7725.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/upd7725/upd7725.cpp')
-rw-r--r-- | src/devices/cpu/upd7725/upd7725.cpp | 15 |
1 files changed, 6 insertions, 9 deletions
diff --git a/src/devices/cpu/upd7725/upd7725.cpp b/src/devices/cpu/upd7725/upd7725.cpp index e1564ccffa1..d2d52a31959 100644 --- a/src/devices/cpu/upd7725/upd7725.cpp +++ b/src/devices/cpu/upd7725/upd7725.cpp @@ -31,9 +31,6 @@ necdsp_device::necdsp_device(const machine_config &mconfig, device_type type, co m_data_config("data", ENDIANNESS_BIG, 16, dbits, -1), m_icount(0), // -1 for WORD-addressable m_irq(0), m_irq_firing(0), - m_program(nullptr), - m_data(nullptr), - m_cache(nullptr), m_in_int_cb(*this), //m_in_si_cb(*this), //m_in_sck_cb(*this), @@ -66,9 +63,9 @@ upd96050_device::upd96050_device(const machine_config &mconfig, const char *tag, void necdsp_device::device_start() { // get our address spaces - m_program = &space(AS_PROGRAM); - m_data = &space(AS_DATA); - m_cache = m_program->cache<2, -2, ENDIANNESS_BIG>(); + space(AS_PROGRAM).specific(m_program); + space(AS_PROGRAM).cache(m_cache); + space(AS_DATA).specific(m_data); // register our state for the debugger state_add(STATE_GENPC, "GENPC", regs.pc).noshow(); @@ -340,7 +337,7 @@ void necdsp_device::execute_run() if (m_irq_firing == 0) // normal opcode { - opcode = m_cache->read_dword(regs.pc) >> 8; + opcode = m_cache.read_dword(regs.pc) >> 8; regs.pc++; } else if (m_irq_firing == 1) // if we're in an interrupt cycle, execute a op 'nop' first... @@ -392,7 +389,7 @@ void necdsp_device::exec_op(uint32_t opcode) { case 3: regs.idb = regs.tr; break; case 4: regs.idb = regs.dp; break; case 5: regs.idb = regs.rp; break; - case 6: regs.idb = m_data->read_word(regs.rp); break; + case 6: regs.idb = m_data.read_word(regs.rp); break; case 7: regs.idb = 0x8000 - regs.flaga.s1; break; //SGN case 8: regs.idb = regs.dr; regs.sr.rqm = 1; break; case 9: regs.idb = regs.dr; break; @@ -589,7 +586,7 @@ void necdsp_device::exec_ld(uint32_t opcode) { case 8: regs.so = bitswap<16>(id, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15); break; //LSB first output, output tapped at bit 15 shifting left case 9: regs.so = id; break; //MSB first output, output tapped at bit 15 shifting left case 10: regs.k = id; break; - case 11: regs.k = id; regs.l = m_data->read_word(regs.rp); break; + case 11: regs.k = id; regs.l = m_data.read_word(regs.rp); break; case 12: regs.l = id; regs.k = dataRAM[regs.dp | 0x40]; break; case 13: regs.l = id; break; case 14: regs.trb = id; break; |