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Merge pull request #1632 from npwoods/dasmstream_unsp

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Changed the UNSP disassembler to use 'std::ostream &' internally
This commit is contained in:
R. Belmont 2016-11-03 14:24:58 -04:00 committed by GitHub
commit ea4e761f9b
1 changed files with 62 additions and 64 deletions
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126
src/devices/cpu/unsp/unspdasm.cpp
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@ -11,17 +11,6 @@
#include "emu.h"
#include <stdarg.h>
static char *output;
static void ATTR_PRINTF(1,2) print(const char *fmt, ...)
{
va_list vl;
va_start(vl, fmt);
vsprintf(output, fmt, vl);
va_end(vl);
}
/*****************************************************************************/
static const char *reg[] =
@ -57,20 +46,16 @@ static const char *alu[] =
#define UNSP_DASM_OK ((OP2X ? 2 : 1) | DASMFLAG_SUPPORTED)
CPU_DISASSEMBLE( unsp )
static offs_t internal_disasm_unsp(cpu_device *device, std::ostream &stream, offs_t pc, const uint8_t *oprom, const uint8_t *opram, int options)
{
uint16_t op = *(uint16_t *)oprom;
uint16_t imm16 = *(uint16_t *)(oprom + 2);
op = big_endianize_int16(op);
imm16 = big_endianize_int16(imm16);
output = buffer;
print("<inv>");
if(OP0 < 0xf && OPA == 0x7 && OP1 < 2)
{
print("%s %04x", jmp[OP0], OP1 ? (pc - OPIMM + 1) : (pc + OPIMM + 1));
util::stream_format(stream, "%s %04x", jmp[OP0], OP1 ? (pc - OPIMM + 1) : (pc + OPIMM + 1));
return UNSP_DASM_OK;
}
@ -78,29 +63,29 @@ CPU_DISASSEMBLE( unsp )
{
// ALU, Indexed
case 0x00: case 0x01: case 0x02: case 0x03: case 0x04: case 0x06: case 0x08: case 0x09: case 0x0a: case 0x0b: case 0x0c: case 0x0d:
print("%s %s, [bp+%02x]", alu[OP0], reg[OPA], OPIMM);
util::stream_format(stream, "%s %s, [bp+%02x]", alu[OP0], reg[OPA], OPIMM);
return UNSP_DASM_OK;
// ALU, Immediate
case 0x10: case 0x11: case 0x12: case 0x13: case 0x14: case 0x16: case 0x18: case 0x19: case 0x1a: case 0x1b: case 0x1c:
print("%s %s, %02x", alu[OP0], reg[OPA], OPIMM);
util::stream_format(stream, "%s %s, %02x", alu[OP0], reg[OPA], OPIMM);
return UNSP_DASM_OK;
// Pop / Interrupt return
case 0x29:
if(op == 0x9a90)
{
print("retf");
util::stream_format(stream, "retf");
return UNSP_DASM_OK;
}
else if(op == 0x9a98)
{
print("reti");
util::stream_format(stream, "reti");
return UNSP_DASM_OK;
}
else if((OPA + 1) < 8 && ((OPA + OPN) < 8))
{
print("pop %s, %s [%s]", reg[OPA+1], reg[OPA+OPN], reg[OPB]);
util::stream_format(stream, "pop %s, %s [%s]", reg[OPA+1], reg[OPA+OPN], reg[OPB]);
return UNSP_DASM_OK;
}
break;
@ -109,7 +94,7 @@ CPU_DISASSEMBLE( unsp )
case 0x2d:
if((OPA + 1) >= OPN && OPA < (OPN + 7))
{
print("push %s, %s [%s]", reg[(OPA+1)-OPN], reg[OPA], reg[OPB]);
util::stream_format(stream, "push %s, %s [%s]", reg[(OPA+1)-OPN], reg[OPA], reg[OPB]);
return UNSP_DASM_OK;
}
break;
@ -119,16 +104,16 @@ CPU_DISASSEMBLE( unsp )
switch(OPN & 3)
{
case 0:
print("%s %s, [%s%s]", alu[OP0], reg[OPA], (OPN & 4) ? "ds:" : "", reg[OPB]);
util::stream_format(stream, "%s %s, [%s%s]", alu[OP0], reg[OPA], (OPN & 4) ? "ds:" : "", reg[OPB]);
return UNSP_DASM_OK;
case 1:
print("%s %s, [%s%s--]", alu[OP0], reg[OPA], (OPN & 4) ? "ds:" : "", reg[OPB]);
util::stream_format(stream, "%s %s, [%s%s--]", alu[OP0], reg[OPA], (OPN & 4) ? "ds:" : "", reg[OPB]);
return UNSP_DASM_OK;
case 2:
print("%s %s, [%s%s++]", alu[OP0], reg[OPA], (OPN & 4) ? "ds:" : "", reg[OPB]);
util::stream_format(stream, "%s %s, [%s%s++]", alu[OP0], reg[OPA], (OPN & 4) ? "ds:" : "", reg[OPB]);
return UNSP_DASM_OK;
case 3:
print("%s %s, [%s++%s]", alu[OP0], reg[OPA], (OPN & 4) ? "ds:" : "", reg[OPB]);
util::stream_format(stream, "%s %s, [%s++%s]", alu[OP0], reg[OPA], (OPN & 4) ? "ds:" : "", reg[OPB]);
return UNSP_DASM_OK;
}
return UNSP_DASM_OK;
@ -139,7 +124,7 @@ CPU_DISASSEMBLE( unsp )
{
// ALU, Register
case 0:
print("%s %s, %s", alu[OP0], reg[OPA], reg[OPB]);
util::stream_format(stream, "%s %s, %s", alu[OP0], reg[OPA], reg[OPB]);
return UNSP_DASM_OK;
// ALU, 16-bit Immediate
@ -148,12 +133,12 @@ CPU_DISASSEMBLE( unsp )
{
if(OP0 != 4 && OP0 != 12)
{
print("%s %s, %s, %04x", alu[OP0], reg[OPA], reg[OPB], imm16);
util::stream_format(stream, "%s %s, %s, %04x", alu[OP0], reg[OPA], reg[OPB], imm16);
return UNSP_DASM_OK;
}
else
{
print("%s %s, %04x", alu[OP0], reg[OPB], imm16);
util::stream_format(stream, "%s %s, %04x", alu[OP0], reg[OPB], imm16);
return UNSP_DASM_OK;
}
}
@ -161,74 +146,71 @@ CPU_DISASSEMBLE( unsp )
// ALU, Direct 16
case 2:
print("%s %s, [%04x]", alu[OP0], reg[OPA], imm16);
util::stream_format(stream, "%s %s, [%04x]", alu[OP0], reg[OPA], imm16);
return UNSP_DASM_OK;
// ALU, Direct 16
case 3:
print("%s [%04x], %s, %s", alu[OP0], imm16, reg[OPA], reg[OPB]);
util::stream_format(stream, "%s [%04x], %s, %s", alu[OP0], imm16, reg[OPA], reg[OPB]);
return UNSP_DASM_OK;
// ALU, Shifted
default:
print("%s %s, %s asr %d", alu[OP0], reg[OPA], reg[OPB], (OPN & 3) + 1);
util::stream_format(stream, "%s %s, %s asr %d", alu[OP0], reg[OPA], reg[OPB], (OPN & 3) + 1);
return UNSP_DASM_OK;
}
case 0x4d:
if(OPN == 3)
{
if(OPA == OPB)
{
print("store [%04x], %s", imm16, reg[OPB]);
}
}
if((OPN == 3) && (OPA == OPB))
util::stream_format(stream, "store [%04x], %s", imm16, reg[OPB]);
else
util::stream_format(stream, "<inv>");
return UNSP_DASM_OK;
// ALU, Shifted
case 0x50: case 0x51: case 0x52: case 0x53: case 0x54: case 0x56: case 0x58: case 0x59: case 0x5a: case 0x5b: case 0x5c:
print("%s %s, %s %s %d", alu[OP0], reg[OPA], reg[OPB], (OPN & 4) ? ">>" : "<<", (OPN & 3) + 1);
util::stream_format(stream, "%s %s, %s %s %d", alu[OP0], reg[OPA], reg[OPB], (OPN & 4) ? ">>" : "<<", (OPN & 3) + 1);
return UNSP_DASM_OK;
// ALU, Rotated
case 0x60: case 0x61: case 0x62: case 0x63: case 0x64: case 0x66: case 0x68: case 0x69: case 0x6a: case 0x6b: case 0x6c:
print("%s %s, %s %s %d", alu[OP0], reg[OPA], reg[OPB], (OPN & 4) ? "ror" : "rol", (OPN & 3) + 1);
util::stream_format(stream, "%s %s, %s %s %d", alu[OP0], reg[OPA], reg[OPB], (OPN & 4) ? "ror" : "rol", (OPN & 3) + 1);
return UNSP_DASM_OK;
// ALU, Direct 8
case 0x70: case 0x71: case 0x72: case 0x73: case 0x74: case 0x76: case 0x78: case 0x79: case 0x7a: case 0x7b: case 0x7c:
print("%s %s, [%02x]", alu[OP0], reg[OPA], OPIMM);
util::stream_format(stream, "%s %s, [%02x]", alu[OP0], reg[OPA], OPIMM);
return UNSP_DASM_OK;
// Call
case 0x1f:
if(OPA == 0)
{
print("call %06x", ((OPIMM << 16) | imm16) << 1);
}
util::stream_format(stream, "call %06x", ((OPIMM << 16) | imm16) << 1);
else
util::stream_format(stream, "<inv>");
return UNSP_DASM_OK;
// Far Jump
case 0x2f: case 0x3f: case 0x6f: case 0x7f:
if (OPA == 7 && OP1 == 2)
{
print("goto %06x", ((OPIMM << 16) | imm16) << 1);
}
util::stream_format(stream, "goto %06x", ((OPIMM << 16) | imm16) << 1);
else
util::stream_format(stream, "<inv>");
return UNSP_DASM_OK;
// Multiply, Unsigned * Signed
case 0x0f:
if(OPN == 1 && OPA != 7)
{
print("mulus %s, %s", reg[OPA], reg[OPB]);
}
util::stream_format(stream, "mulus %s, %s", reg[OPA], reg[OPB]);
else
util::stream_format(stream, "<inv>");
return UNSP_DASM_OK;
// Multiply, Signed * Signed
case 0x4f:
if(OPN == 1 && OPA != 7)
{
print("mulss %s, %s", reg[OPA], reg[OPB]);
}
util::stream_format(stream, "mulss %s, %s", reg[OPA], reg[OPB]);
else
util::stream_format(stream, "<inv>");
return UNSP_DASM_OK;
// Interrupt flags
@ -238,35 +220,51 @@ CPU_DISASSEMBLE( unsp )
switch(OPIMM)
{
case 0:
print("int off");
util::stream_format(stream, "int off");
break;
case 1:
print("int irq");
util::stream_format(stream, "int irq");
break;
case 2:
print("int fiq");
util::stream_format(stream, "int fiq");
break;
case 3:
print("int irq,fiq");
util::stream_format(stream, "int irq,fiq");
break;
case 8:
print("irq off");
util::stream_format(stream, "irq off");
break;
case 9:
print("irq on");
util::stream_format(stream, "irq on");
break;
case 12:
print("fiq off");
util::stream_format(stream, "fiq off");
break;
case 14:
print("fiq on");
util::stream_format(stream, "fiq on");
break;
case 37:
print("nop");
util::stream_format(stream, "nop");
break;
default:
util::stream_format(stream, "<inv>");
break;
}
}
else
util::stream_format(stream, "<inv>");
return UNSP_DASM_OK;
}
util::stream_format(stream, "<inv>");
return UNSP_DASM_OK;
}
CPU_DISASSEMBLE(unsp)
{
std::ostringstream stream;
offs_t result = internal_disasm_unsp(device, stream, pc, oprom, opram, options);
std::string stream_str = stream.str();
strcpy(buffer, stream_str.c_str());
return result;
}