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ns32000: support ns32332 disassembly

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This commit is contained in:
Patrick Mackinlay 2022-02-22 20:43:42 +07:00
parent 6b6b366ea1
commit 96e1aaa5a5
2 changed files with 44 additions and 3 deletions
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46
src/devices/cpu/ns32000/ns32000dasm.cpp
View File

@ -177,6 +177,25 @@ std::string ns32000_disassembler::reglist(u8 imm)
return result;
}
std::string ns32000_disassembler::config(u8 imm)
{
static char const *const cfg[] = { "I", "F", "M", "C", "FF", "FM", "FC", "P" };
std::string result;
for (unsigned i = 0; i < 8; i++)
{
if (BIT(imm, i))
{
if (!result.empty())
result.append(",");
result.append(cfg[i]);
}
}
return result;
}
offs_t ns32000_disassembler::disassemble(std::ostream &stream, offs_t pc, data_buffer const &opcodes, data_buffer const &params)
{
uint32_t flags = SUPPORTED;
@ -295,7 +314,6 @@ offs_t ns32000_disassembler::disassemble(std::ostream &stream, offs_t pc, data_b
u16 const opword = opcodes.r16(pc + bytes); bytes += 2;
char const *const options[] = { "", "B", "W", "W,B", "", "", "U", "U,B" };
char const *const config[] = { "", "I", "F", "F,I", "M", "M,I", "M,F", "M,F,I", "C", "C,I", "C,F", "C,F,I", "C,M", "C,M,I", "C,M,F", "C,M,F,I" };
size_code const size = size_code(opword & 3);
@ -313,7 +331,7 @@ offs_t ns32000_disassembler::disassemble(std::ostream &stream, offs_t pc, data_b
else
util::stream_format(stream, "CMPS%c %s", size_char[size], options[BIT(opword, 8, 3)]);
break;
case 2: util::stream_format(stream, "SETCFG [%s]", config[BIT(opword, 7, 4)]); break;
case 2: util::stream_format(stream, "SETCFG [%s]", config(BIT(opword, 7, 8))); break;
case 3:
if (BIT(opword, 7))
util::stream_format(stream, "SKPST%c %s", size_char[size], options[BIT(opword, 8, 3)]);
@ -548,13 +566,35 @@ offs_t ns32000_disassembler::disassemble(std::ostream &stream, offs_t pc, data_b
}
}
break;
case 0xfe: // format 12
case 0xfe:
// format 12: xxxx xyyy yyoo oo0f 1111 1110
{
u16 const opword = opcodes.r16(pc + bytes); bytes += 2;
addr_mode mode[] = { addr_mode(BIT(opword, 11, 5)), addr_mode(BIT(opword, 6, 5)) };
size_code const size_f = BIT(opword, 0) ? SIZE_D : SIZE_Q;
mode[0].size_f(size_f);
mode[1].size_f(size_f);
decode(mode, pc, opcodes, bytes);
switch (BIT(opword, 2, 4))
{
case 0x2: util::stream_format(stream, "POLY%c %s, %s", BIT(opword, 0) ? 'F' : 'L', mode[0].mode, mode[1].mode); break;
case 0x3: util::stream_format(stream, "DOT%c %s, %s", BIT(opword, 0) ? 'F' : 'L', mode[0].mode, mode[1].mode); break;
case 0x4: util::stream_format(stream, "SCALB%c %s, %s", BIT(opword, 0) ? 'F' : 'L', mode[0].mode, mode[1].mode); break;
case 0x5: util::stream_format(stream, "LOGB%c %s, %s", BIT(opword, 0) ? 'F' : 'L', mode[0].mode, mode[1].mode); break;
default: bytes = 1; break;
}
}
break;
case 0x9e: // format 13
bytes = 1;
break;
case 0x1e:
// format 14: xxxx xsss s0oo ooii 0001 1110
{
// TODO: different mmu registers for 32332 and 32532
char const *const mmureg[] = { "BPR0", "BPR1", "", "", "PF0", "PF1", "", "", "SC", "", "MSR", "BCNT", "PTB0", "PTB1", "", "EIA" };
u16 const opword = opcodes.r16(pc + bytes); bytes += 2;

1
src/devices/cpu/ns32000/ns32000dasm.h
View File

@ -46,6 +46,7 @@ protected:
std::string displacement_string(offs_t pc, data_buffer const &opcodes, unsigned &bytes, std::string const zero = "");
void decode(addr_mode *mode, offs_t pc, data_buffer const &opcodes, unsigned &bytes);
std::string reglist(u8 imm);
std::string config(u8 imm);
};
#endif // MAME_CPU_NS32000_NS32000DASM_H