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author Miodrag Milanovic <mmicko@gmail.com>2015-11-08 12:56:12 +0100
committer Miodrag Milanovic <mmicko@gmail.com>2015-11-08 12:56:12 +0100
commit7c19aac60e12d6f5ea301bdb34d7826a01e0b06f (patch)
treef310d86aa2c6bfc19d115307dedde4eb0cd52dad /src/emu/memarray.cpp
parenta57b46ae933badd7441ce1644711dbb851e2b504 (diff)
Rename *.c -> *.cpp in our source (nw)
Diffstat (limited to 'src/emu/memarray.cpp')
-rw-r--r--src/emu/memarray.cpp192
1 files changed, 192 insertions, 0 deletions
diff --git a/src/emu/memarray.cpp b/src/emu/memarray.cpp
new file mode 100644
index 00000000000..94662f0c7b0
--- /dev/null
+++ b/src/emu/memarray.cpp
@@ -0,0 +1,192 @@
+// license:BSD-3-Clause
+// copyright-holders:Aaron Giles
+/***************************************************************************
+
+ memarray.c
+
+ Generic memory array accessor helper.
+
+***************************************************************************/
+
+#include "emu.h"
+
+
+//**************************************************************************
+// MEMORY ARRAY HELPER
+//**************************************************************************
+
+//-------------------------------------------------
+// memory_array - constructor
+//-------------------------------------------------
+
+memory_array::memory_array()
+ : m_base(NULL),
+ m_bytes(0),
+ m_membits(0),
+ m_endianness(ENDIANNESS_LITTLE),
+ m_bytes_per_entry(0),
+ m_read_entry(NULL),
+ m_write_entry(NULL)
+{
+}
+
+
+//-------------------------------------------------
+// set - configure the parameters
+//-------------------------------------------------
+
+void memory_array::set(void *base, UINT32 bytes, int membits, endianness_t endianness, int bpe)
+{
+ // validate inputs
+ assert(base != NULL);
+ assert(bytes > 0);
+ assert(membits == 8 || membits == 16 || membits == 32 || membits == 64);
+ assert(bpe == 1 || bpe == 2 || bpe == 4);
+
+ // populate direct data
+ m_base = base;
+ m_bytes = bytes;
+ m_membits = membits;
+ m_endianness = endianness;
+ m_bytes_per_entry = bpe;
+
+ // derive data
+ switch (bpe*1000 + membits*10 + endianness)
+ {
+ case 1*1000 + 8*10 + ENDIANNESS_LITTLE: m_read_entry = &memory_array::read8_from_8; m_write_entry = &memory_array::write8_to_8; break;
+ case 1*1000 + 8*10 + ENDIANNESS_BIG: m_read_entry = &memory_array::read8_from_8; m_write_entry = &memory_array::write8_to_8; break;
+ case 1*1000 + 16*10 + ENDIANNESS_LITTLE: m_read_entry = &memory_array::read8_from_16le; m_write_entry = &memory_array::write8_to_16le; break;
+ case 1*1000 + 16*10 + ENDIANNESS_BIG: m_read_entry = &memory_array::read8_from_16be; m_write_entry = &memory_array::write8_to_16be; break;
+ case 1*1000 + 32*10 + ENDIANNESS_LITTLE: m_read_entry = &memory_array::read8_from_32le; m_write_entry = &memory_array::write8_to_32le; break;
+ case 1*1000 + 32*10 + ENDIANNESS_BIG: m_read_entry = &memory_array::read8_from_32be; m_write_entry = &memory_array::write8_to_32be; break;
+ case 1*1000 + 64*10 + ENDIANNESS_LITTLE: m_read_entry = &memory_array::read8_from_64le; m_write_entry = &memory_array::write8_to_64le; break;
+ case 1*1000 + 64*10 + ENDIANNESS_BIG: m_read_entry = &memory_array::read8_from_64be; m_write_entry = &memory_array::write8_to_64be; break;
+
+ case 2*1000 + 8*10 + ENDIANNESS_LITTLE: m_read_entry = &memory_array::read16_from_8le; m_write_entry = &memory_array::write16_to_8le; break;
+ case 2*1000 + 8*10 + ENDIANNESS_BIG: m_read_entry = &memory_array::read16_from_8be; m_write_entry = &memory_array::write16_to_8be; break;
+ case 2*1000 + 16*10 + ENDIANNESS_LITTLE: m_read_entry = &memory_array::read16_from_16; m_write_entry = &memory_array::write16_to_16; break;
+ case 2*1000 + 16*10 + ENDIANNESS_BIG: m_read_entry = &memory_array::read16_from_16; m_write_entry = &memory_array::write16_to_16; break;
+ case 2*1000 + 32*10 + ENDIANNESS_LITTLE: m_read_entry = &memory_array::read16_from_32le; m_write_entry = &memory_array::write16_to_32le; break;
+ case 2*1000 + 32*10 + ENDIANNESS_BIG: m_read_entry = &memory_array::read16_from_32be; m_write_entry = &memory_array::write16_to_32be; break;
+ case 2*1000 + 64*10 + ENDIANNESS_LITTLE: m_read_entry = &memory_array::read16_from_64le; m_write_entry = &memory_array::write16_to_64le; break;
+ case 2*1000 + 64*10 + ENDIANNESS_BIG: m_read_entry = &memory_array::read16_from_64be; m_write_entry = &memory_array::write16_to_64be; break;
+
+ case 4*1000 + 8*10 + ENDIANNESS_LITTLE: m_read_entry = &memory_array::read32_from_8le; m_write_entry = &memory_array::write32_to_8le; break;
+ case 4*1000 + 8*10 + ENDIANNESS_BIG: m_read_entry = &memory_array::read32_from_8be; m_write_entry = &memory_array::write32_to_8be; break;
+ case 4*1000 + 16*10 + ENDIANNESS_LITTLE: m_read_entry = &memory_array::read32_from_16le; m_write_entry = &memory_array::write32_to_16le; break;
+ case 4*1000 + 16*10 + ENDIANNESS_BIG: m_read_entry = &memory_array::read32_from_16be; m_write_entry = &memory_array::write32_to_16be; break;
+ case 4*1000 + 32*10 + ENDIANNESS_LITTLE: m_read_entry = &memory_array::read32_from_32; m_write_entry = &memory_array::write32_to_32; break;
+ case 4*1000 + 32*10 + ENDIANNESS_BIG: m_read_entry = &memory_array::read32_from_32; m_write_entry = &memory_array::write32_to_32; break;
+ case 4*1000 + 64*10 + ENDIANNESS_LITTLE: m_read_entry = &memory_array::read32_from_64le; m_write_entry = &memory_array::write32_to_64le; break;
+ case 4*1000 + 64*10 + ENDIANNESS_BIG: m_read_entry = &memory_array::read32_from_64be; m_write_entry = &memory_array::write32_to_64be; break;
+
+ default: throw emu_fatalerror("Illegal memory bits/bus width combo in memory_array");
+ }
+}
+
+
+//-------------------------------------------------
+// set - additional setter variants
+//-------------------------------------------------
+
+void memory_array::set(const address_space &space, void *base, UINT32 bytes, int bpe)
+{
+ set(base, bytes, space.data_width(), space.endianness(), bpe);
+}
+
+void memory_array::set(const memory_share &share, int bpe)
+{
+ set(share.ptr(), share.bytes(), share.bitwidth(), share.endianness(), bpe);
+}
+
+void memory_array::set(const memory_array &array)
+{
+ set(array.base(), array.bytes(), array.membits(), array.endianness(), array.bytes_per_entry());
+}
+
+
+//-------------------------------------------------
+// piecewise configuration
+//-------------------------------------------------
+
+void memory_array::set_membits(int membits)
+{
+ set(m_base, m_bytes, membits, m_endianness, m_bytes_per_entry);
+}
+
+void memory_array::set_endianness(endianness_t endianness)
+{
+ set(m_base, m_bytes, m_membits, endianness, m_bytes_per_entry);
+}
+
+
+//-------------------------------------------------
+// read8_from_*/write8_to_* - entry read/write
+// heleprs for 1 byte-per-entry
+//-------------------------------------------------
+
+UINT32 memory_array::read8_from_8(int index) { return reinterpret_cast<UINT8 *>(m_base)[index]; }
+void memory_array::write8_to_8(int index, UINT32 data) { reinterpret_cast<UINT8 *>(m_base)[index] = data; }
+
+UINT32 memory_array::read8_from_16le(int index) { return reinterpret_cast<UINT8 *>(m_base)[BYTE_XOR_LE(index)]; }
+void memory_array::write8_to_16le(int index, UINT32 data) { reinterpret_cast<UINT8 *>(m_base)[BYTE_XOR_LE(index)] = data; }
+UINT32 memory_array::read8_from_16be(int index) { return reinterpret_cast<UINT8 *>(m_base)[BYTE_XOR_BE(index)]; }
+void memory_array::write8_to_16be(int index, UINT32 data) { reinterpret_cast<UINT8 *>(m_base)[BYTE_XOR_BE(index)] = data; }
+
+UINT32 memory_array::read8_from_32le(int index) { return reinterpret_cast<UINT8 *>(m_base)[BYTE4_XOR_LE(index)]; }
+void memory_array::write8_to_32le(int index, UINT32 data) { reinterpret_cast<UINT8 *>(m_base)[BYTE4_XOR_LE(index)] = data; }
+UINT32 memory_array::read8_from_32be(int index) { return reinterpret_cast<UINT8 *>(m_base)[BYTE4_XOR_BE(index)]; }
+void memory_array::write8_to_32be(int index, UINT32 data) { reinterpret_cast<UINT8 *>(m_base)[BYTE4_XOR_BE(index)] = data; }
+
+UINT32 memory_array::read8_from_64le(int index) { return reinterpret_cast<UINT8 *>(m_base)[BYTE8_XOR_BE(index)]; }
+void memory_array::write8_to_64le(int index, UINT32 data) { reinterpret_cast<UINT8 *>(m_base)[BYTE8_XOR_BE(index)] = data; }
+UINT32 memory_array::read8_from_64be(int index) { return reinterpret_cast<UINT8 *>(m_base)[BYTE8_XOR_BE(index)]; }
+void memory_array::write8_to_64be(int index, UINT32 data) { reinterpret_cast<UINT8 *>(m_base)[BYTE8_XOR_BE(index)] = data; }
+
+
+//-------------------------------------------------
+// read16_from_*/write16_to_* - entry read/write
+// heleprs for 2 bytes-per-entry
+//-------------------------------------------------
+
+UINT32 memory_array::read16_from_8le(int index) { return read8_from_8(index*2) | (read8_from_8(index*2+1) << 8); }
+void memory_array::write16_to_8le(int index, UINT32 data) { write8_to_8(index*2, data); write8_to_8(index*2+1, data >> 8); }
+UINT32 memory_array::read16_from_8be(int index) { return (read8_from_8(index*2) << 8) | read8_from_8(index*2+1); }
+void memory_array::write16_to_8be(int index, UINT32 data) { write8_to_8(index*2, data >> 8); write8_to_8(index*2+1, data); }
+
+UINT32 memory_array::read16_from_16(int index) { return reinterpret_cast<UINT16 *>(m_base)[index]; }
+void memory_array::write16_to_16(int index, UINT32 data) { reinterpret_cast<UINT16 *>(m_base)[index] = data; }
+
+UINT32 memory_array::read16_from_32le(int index) { return reinterpret_cast<UINT16 *>(m_base)[BYTE_XOR_LE(index)]; }
+void memory_array::write16_to_32le(int index, UINT32 data) { reinterpret_cast<UINT16 *>(m_base)[BYTE_XOR_LE(index)] = data; }
+UINT32 memory_array::read16_from_32be(int index) { return reinterpret_cast<UINT16 *>(m_base)[BYTE_XOR_BE(index)]; }
+void memory_array::write16_to_32be(int index, UINT32 data) { reinterpret_cast<UINT16 *>(m_base)[BYTE_XOR_BE(index)] = data; }
+
+UINT32 memory_array::read16_from_64le(int index) { return reinterpret_cast<UINT16 *>(m_base)[BYTE4_XOR_LE(index)]; }
+void memory_array::write16_to_64le(int index, UINT32 data) { reinterpret_cast<UINT16 *>(m_base)[BYTE4_XOR_LE(index)] = data; }
+UINT32 memory_array::read16_from_64be(int index) { return reinterpret_cast<UINT16 *>(m_base)[BYTE4_XOR_BE(index)]; }
+void memory_array::write16_to_64be(int index, UINT32 data) { reinterpret_cast<UINT16 *>(m_base)[BYTE4_XOR_BE(index)] = data; }
+
+
+//-------------------------------------------------
+// read32_from_*/write32_to_* - entry read/write
+// heleprs for 4 bytes-per-entry
+//-------------------------------------------------
+
+UINT32 memory_array::read32_from_8le(int index) { return read16_from_8le(index*2) | (read16_from_8le(index*2+1) << 16); }
+void memory_array::write32_to_8le(int index, UINT32 data) { write16_to_8le(index*2, data); write16_to_8le(index*2+1, data >> 16); }
+UINT32 memory_array::read32_from_8be(int index) { return (read16_from_8be(index*2) << 16) | read16_from_8be(index*2+1); }
+void memory_array::write32_to_8be(int index, UINT32 data) { write16_to_8be(index*2, data >> 16); write16_to_8be(index*2+1, data); }
+
+UINT32 memory_array::read32_from_16le(int index) { return read16_from_16(index*2) | (read16_from_16(index*2+1) << 16); }
+void memory_array::write32_to_16le(int index, UINT32 data) { write16_to_16(index*2, data); write16_to_16(index*2+1, data >> 16); }
+UINT32 memory_array::read32_from_16be(int index) { return (read16_from_16(index*2) << 16) | read16_from_16(index*2+1); }
+void memory_array::write32_to_16be(int index, UINT32 data) { write16_to_16(index*2, data >> 16); write16_to_16(index*2+1, data); }
+
+UINT32 memory_array::read32_from_32(int index) { return reinterpret_cast<UINT32 *>(m_base)[index]; }
+void memory_array::write32_to_32(int index, UINT32 data) { reinterpret_cast<UINT32 *>(m_base)[index] = data; }
+
+UINT32 memory_array::read32_from_64le(int index) { return reinterpret_cast<UINT32 *>(m_base)[BYTE_XOR_LE(index)]; }
+void memory_array::write32_to_64le(int index, UINT32 data) { reinterpret_cast<UINT32 *>(m_base)[BYTE_XOR_LE(index)] = data; }
+UINT32 memory_array::read32_from_64be(int index) { return reinterpret_cast<UINT32 *>(m_base)[BYTE_XOR_BE(index)]; }
+void memory_array::write32_to_64be(int index, UINT32 data) { reinterpret_cast<UINT32 *>(m_base)[BYTE_XOR_BE(index)] = data; }