Macintosh-Tools/dingusppc
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Condensed trap operations + added mnemonics for tw

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This commit is contained in:
dingusdev 2020-02-12 20:41:23 -07:00
parent c2eafcc45d
commit c8e03286e7
1 changed files with 32 additions and 36 deletions
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66
cpu/ppc/ppcdisasm.cpp
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@ -123,6 +123,13 @@ const char* opc_flt_ext_arith[32] = { /* integer load and store instructions */
"", "fmul", "", "", "fmsub", "fmadd", "fnmsub", "fnmadd",
};
const char* trap_cond[32] = { /*Trap conditions*/
"", "twlgt", "twllt", "", "tweq", "twlge", "twlle", "",
"twgt", "", "", "", "twge", "", "", "",
"twlt", "", "", "", "twle", "", "", "",
"twne", "", "", "", "", "", "", ""
};
/** various formatting helpers. */
void fmt_oneop(string& buf, const char* opc, int src)
{
@ -209,44 +216,18 @@ void opc_twi(PPCDisasmContext* ctx)
int32_t imm = SIGNEXT(ctx->instr_code & 0xFFFF, 15);
if (ctx->simplified) {
switch (to) {
case 1:
strcpy(opcode, "twlgti");
break;
case 2:
strcpy(opcode, "twllti");
break;
case 4:
strcpy(opcode, "tweqi");
break;
case 5:
strcpy(opcode, "twlgei");
break;
case 6:
strcpy(opcode, "twllei");
break;
case 8:
strcpy(opcode, "twgti");
break;
case 12:
strcpy(opcode, "twgei");
break;
case 16:
strcpy(opcode, "twlti");
break;
case 20:
strcpy(opcode, "twlei");
break;
case 24:
strcpy(opcode, "twnei");
break;
default:
strcpy(opcode, trap_cond[to]);
if (strlen(opcode) == 0) {
opc_illegal(ctx);
return;
}
else {
strcat(opcode, "i");
ctx->instr_str = my_sprintf("%-8sr%d, 0x%08X", opcode, ra, imm);
}
}
else {
ctx->instr_str = my_sprintf("%-8s%d, r%d, 0x%08X", "twi", to, ra, imm);
}
@ -966,10 +947,25 @@ void opc_group31(PPCDisasmContext* ctx)
ctx->instr_str = my_sprintf("%-8sr%d, r%d, r%d", "cmp", rs, ra, rb);
break;
case 4: /* tw */
if (rc_set)
if (rc_set) {
opc_illegal(ctx);
else
}
else {
if (ctx->simplified) {
strcpy(opcode, trap_cond[rs]);
if (strlen(opcode) == 0) {
opc_illegal(ctx);
return;
}
ctx->instr_str = my_sprintf("%-8sr%d, r%d", opcode, ra, rb);
}
else {
ctx->instr_str = my_sprintf("%-8s%d, r%d, r%d", "tw", rs, ra, rb);
}
}
break;
case 19: /* mfcr */
fmt_oneop(ctx->instr_str, "mfcr", rs);