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Changed the PPS4 disassembler to use 'std::ostream &' internally

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This commit is contained in:
Nathan Woods 2016-10-30 00:14:07 -04:00
parent 06613b3dd1
commit fe09ebc47d
1 changed files with 20 additions and 12 deletions
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32
src/devices/cpu/pps4/pps4dasm.cpp
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@ -367,49 +367,48 @@ static const uint16_t table[] = {
/* ff */ t_TM | t_I6i | t_OVER /* ff */ t_TM | t_I6i | t_OVER
}; };
CPU_DISASSEMBLE( pps4 ) static offs_t internal_disasm_pps4(cpu_device *device, std::ostream &stream, offs_t pc, const uint8_t *oprom, const uint8_t *opram, int options)
{ {
uint32_t flags = 0; uint32_t flags = 0;
unsigned PC = pc; unsigned PC = pc;
uint8_t op = OP(pc++); uint8_t op = OP(pc++);
uint32_t tok = table[op]; uint32_t tok = table[op];
char *dst = nullptr;
if (0 == (tok & t_MASK)) { if (0 == (tok & t_MASK)) {
sprintf(buffer, "%s", token_str[tok & t_MASK]); stream << token_str[tok & t_MASK];
} else { } else {
dst = buffer + sprintf(buffer, "%-7s", token_str[tok & t_MASK]); util::stream_format(stream, "%-7s", token_str[tok & t_MASK]);
} }
if (tok & t_I3c) { if (tok & t_I3c) {
// 3 bit immediate, complemented // 3 bit immediate, complemented
uint8_t i = ~op & 7; uint8_t i = ~op & 7;
if (0 != i) // only print if non-zero if (0 != i) // only print if non-zero
dst += sprintf(dst, "%x", i); util::stream_format(stream, "%x", i);
} }
if (tok & t_I4) { if (tok & t_I4) {
// 4 bit immediate // 4 bit immediate
uint8_t i = op & 15; uint8_t i = op & 15;
dst += sprintf(dst, "%x", i); util::stream_format(stream, "%x", i);
} }
if (tok & t_I4c) { if (tok & t_I4c) {
// 4 bit immediate, complemented // 4 bit immediate, complemented
uint8_t i = ~op & 15; uint8_t i = ~op & 15;
dst += sprintf(dst, "%x", i); util::stream_format(stream, "%x", i);
} }
if (tok & t_I4p) { if (tok & t_I4p) {
// 4 bit immediate offset into page 3 // 4 bit immediate offset into page 3
uint8_t i = op & 15; uint8_t i = op & 15;
dst += sprintf(dst, "[%x]", 0x0c0 | i); util::stream_format(stream, "[%x]", 0x0c0 | i);
} }
if (tok & t_I6p) { if (tok & t_I6p) {
// 6 bit immediate offset into current page // 6 bit immediate offset into current page
uint8_t i = op & 63; uint8_t i = op & 63;
dst += sprintf(dst, "%x", (PC & ~63) | i); util::stream_format(stream, "%x", (PC & ~63) | i);
} }
if (tok & t_I6i) { if (tok & t_I6i) {
@ -418,19 +417,19 @@ CPU_DISASSEMBLE( pps4 )
// 8 bit absolute offset at 0x0100 // 8 bit absolute offset at 0x0100
uint16_t addr = (1 << 8) | 0; // ROM[ip3] can't be reached!? uint16_t addr = (1 << 8) | 0; // ROM[ip3] can't be reached!?
(void)addr; // avoid unused variable warning (void)addr; // avoid unused variable warning
dst += sprintf(dst, "[%x]", i6p3); util::stream_format(stream, "[%x]", i6p3);
} }
if (tok & t_I8) { if (tok & t_I8) {
// 8 bit immediate I/O port address // 8 bit immediate I/O port address
uint8_t arg = ARG(pc++); uint8_t arg = ARG(pc++);
dst += sprintf(dst, "%02x", arg); util::stream_format(stream, "%02x", arg);
} }
if (tok & t_I8c) { if (tok & t_I8c) {
// 8 bit immediate offset into page // 8 bit immediate offset into page
uint16_t arg = ~ARG(pc++) & 255; uint16_t arg = ~ARG(pc++) & 255;
dst += sprintf(dst, "%02x", arg); util::stream_format(stream, "%02x", arg);
} }
if (tok & t_OVER) // TL or TML if (tok & t_OVER) // TL or TML
@ -441,3 +440,12 @@ CPU_DISASSEMBLE( pps4 )
return (pc - PC) | flags | DASMFLAG_SUPPORTED; return (pc - PC) | flags | DASMFLAG_SUPPORTED;
} }
CPU_DISASSEMBLE(pps4)
{
std::ostringstream stream;
offs_t result = internal_disasm_pps4(device, stream, pc, oprom, opram, options);
std::string stream_str = stream.str();
strcpy(buffer, stream_str.c_str());
return result;
}