ShuriZma
/
xenia
mirror of https://github.com/xenia-project/xenia.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

[PPC] disasm: BC formatting improvements

This commit is contained in:
eladash 2019-05-13 07:30:10 +03:00 committed by gibbed
parent af7bc97429
commit 67e3b1f453
1 changed files with 139 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

148
src/xenia/cpu/ppc/ppc_opcode_disasm.cc
View File

@ -191,17 +191,147 @@ void PrintDisasm_bclrx(const PPCDecodeData& d, StringBuffer* str) {
str->AppendFormat("%d", d.XL.BI());
}
void PrintDisasm_bcx(const PPCDecodeData& d, StringBuffer* str) {
// bc[LK][AA] [BO], [BI], [ADDR]
// [bc][LK][AA][+-] [BO], [BI], [ADDR]
size_t str_start = str->length();
str->Append("bc");
if (d.B.LK()) str->Append('l');
if (d.B.AA()) str->Append('a');
PadStringBuffer(str, str_start, kNamePad);
str->AppendFormat("%d", d.B.BO());
const uint32_t bo = d.B.BO();
const uint32_t bi = d.B.BI();
const uint32_t addr = d.B.ADDR();
const bool bo0 = bo & 0x10;
const bool bo1 = bo & 0x08;
const bool bo2 = bo & 0x04;
const bool bo3 = bo & 0x02;
const bool bo4 = bo & 0x01;
int sign_char = 0; // Default no sign
if (bo0 && !bo1 && !bo2 && bo3 && !bo4) {
str->Append("bdz");
} else if (bo0 && bo1 && !bo2 && bo3 && !bo4) {
str->Append("bdz");
sign_char = -1;
} else if (bo0 && bo1 && !bo2 && bo3 && bo4) {
str->Append("bdz");
sign_char = +1;
} else if (bo0 && !bo1 && !bo2 && !bo3 && !bo4) {
str->Append("bdnz");
} else if (bo0 && bo1 && !bo2 && !bo3 && !bo4) {
str->Append("bdnz");
sign_char = -1;
} else if (bo0 && bo1 && !bo2 && !bo3 && bo4) {
str->Append("bdnz");
sign_char = +1;
} else if (!bo0 && !bo1 && bo2 && !bo3 && !bo4) {
switch (bi % 4) {
case 0x0:
str->Append("bge");
break;
case 0x1:
str->Append("ble");
break;
case 0x2:
str->Append("bne");
break;
}
} else if (!bo0 && !bo1 && bo2 && bo3 && !bo4) {
switch (bi % 4) {
case 0x0:
str->Append("bge");
sign_char = -1;
break;
case 0x1:
str->Append("ble");
sign_char = -1;
break;
case 0x2:
str->Append("bne");
sign_char = -1;
break;
}
} else if (!bo0 && !bo1 && bo2 && bo3 && bo4) {
switch (bi % 4) {
case 0x0:
str->Append("bge");
sign_char = +1;
break;
case 0x1:
str->Append("ble");
sign_char = +1;
break;
case 0x2:
str->Append("bne");
sign_char = +1;
break;
}
} else if (!bo0 && bo1 && bo2 && !bo3 && !bo4) {
switch (bi % 4) {
case 0x0:
str->Append("blt");
break;
case 0x1:
str->Append("bgt");
break;
case 0x2:
str->Append("beq");
break;
}
} else if (!bo0 && bo1 && bo2 && bo3 && !bo4) {
switch (bi % 4) {
case 0x0:
str->Append("blt");
sign_char = -1;
break;
case 0x1:
str->Append("bgt");
sign_char = -1;
break;
case 0x2:
str->Append("beq");
sign_char = -1;
break;
}
} else if (!bo0 && bo1 && bo2 && bo3 && bo4) {
switch (bi % 4) {
case 0x0:
str->Append("blt");
sign_char = +1;
break;
case 0x1:
str->Append("bgt");
sign_char = +1;
break;
case 0x2:
str->Append("beq");
sign_char = +1;
break;
}
}
if (str_start == str->length()) {
// Default
str->Append("bc");
if (d.B.LK()) str->Append('l');
if (d.B.AA()) str->Append('a');
PadStringBuffer(str, str_start, kNamePad);
str->AppendFormat("%d", bo);
str->Append(", ");
str->AppendFormat("%d", bi);
} else {
if (d.B.LK()) str->Append('l');
if (d.B.AA()) str->Append('a');
if (sign_char > 0) {
str->Append('+');
} else if (sign_char < 0) {
str->Append('-');
}
PadStringBuffer(str, str_start, kNamePad);
str->AppendFormat("crf%d", bi / 4);
}
str->Append(", ");
str->AppendFormat("%d", d.B.BI());
str->Append(", ");
str->AppendFormat("0x%X", d.B.ADDR());
str->AppendFormat("0x%X", addr);
}
void PrintDisasm_bx(const PPCDecodeData& d, StringBuffer* str) {
// b[LK][AA] [ADDR]