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[PPC] Support basic form of sc.

This commit is contained in:
gibbed 2020-02-11 05:56:36 -06:00 committed by Rick Gibbed
parent ce1d632f4e
commit e2346ee539
6 changed files with 27 additions and 4 deletions
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15
src/xenia/cpu/ppc/ppc_decode_data.h
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@ -42,7 +42,20 @@ static inline uint64_t XEMASK(uint32_t mstart, uint32_t mstop) {
}
struct PPCDecodeData {
struct FormatSC {};
struct FormatSC {
uint32_t LEV() const { return bits_.LEV; }
private:
uint32_t address_;
union {
uint32_t value_;
struct {
uint32_t : 5;
uint32_t LEV : 7;
uint32_t : 20;
} bits_;
};
};
struct FormatD {
uint32_t RT() const { return bits_.RT; }
uint32_t RD() const { return RT(); }

5
src/xenia/cpu/ppc/ppc_instr.h
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@ -49,6 +49,11 @@ struct InstrData {
} B;
// kXEPPCInstrFormatSC
struct {
uint32_t : 5;
uint32_t LEV : 7;
uint32_t : 20;
} SC;
// kXEPPCInstrFormatD
struct {
uint32_t DS : 16;

5
src/xenia/cpu/ppc/ppc_opcode_disasm_gen.cc
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@ -1977,10 +1977,11 @@ void PrintDisasm_rlwnmx(const PPCDecodeData& d, StringBuffer* str) {
str->AppendFormat("%d", d.M.ME());
}
void PrintDisasm_sc(const PPCDecodeData& d, StringBuffer* str) {
// sc
// sc [LEV]
size_t str_start = str->length();
str->Append("sc");
PadStringBuffer(str, str_start, kNamePad);
if (d.SC.LEV()) str->AppendFormat("%d", d.SC.LEV());
}
void PrintDisasm_sldx(const PPCDecodeData& d, StringBuffer* str) {
// sld[Rc] [RA], [RS], [RB]
@ -5131,7 +5132,7 @@ PPCOpcodeDisasmInfo ppc_opcode_disasm_table[] = {
INSTRUCTION(0x50000000, "rlwimix" , kM , kI, kGeneral, "Rotate Left Word Immediate then Mask Insert" , (PPCOpcodeField::kRS,PPCOpcodeField::kSH,PPCOpcodeField::kMB,PPCOpcodeField::kME), (PPCOpcodeField::kRA,PPCOpcodeField::kCRcond), PrintDisasm_rlwimix),
INSTRUCTION(0x54000000, "rlwinmx" , kM , kI, kGeneral, "Rotate Left Word Immediate then AND with Mask" , (PPCOpcodeField::kRS,PPCOpcodeField::kSH,PPCOpcodeField::kMB,PPCOpcodeField::kME), (PPCOpcodeField::kRA,PPCOpcodeField::kCRcond), PrintDisasm_rlwinmx),
INSTRUCTION(0x5c000000, "rlwnmx" , kM , kI, kGeneral, "Rotate Left Word then AND with Mask" , (PPCOpcodeField::kRS,PPCOpcodeField::kRB,PPCOpcodeField::kMB,PPCOpcodeField::kME), (PPCOpcodeField::kRA,PPCOpcodeField::kCRcond), PrintDisasm_rlwnmx),
INSTRUCTION(0x44000002, "sc" , kSC , kB, kSync , "System Call" , (), (), PrintDisasm_sc),
INSTRUCTION(0x44000002, "sc" , kSC , kB, kSync , "System Call" , (PPCOpcodeField::kLEV), (), PrintDisasm_sc),
INSTRUCTION(0x7c000036, "sldx" , kX , kI, kGeneral, "Shift Left Doubleword" , (PPCOpcodeField::kRS,PPCOpcodeField::kRB), (PPCOpcodeField::kRA,PPCOpcodeField::kCRcond), PrintDisasm_sldx),
INSTRUCTION(0x7c000030, "slwx" , kX , kI, kGeneral, "Shift Left Word" , (PPCOpcodeField::kRS,PPCOpcodeField::kRB), (PPCOpcodeField::kRA,PPCOpcodeField::kCRcond), PrintDisasm_slwx),
INSTRUCTION(0x7c000674, "sradix" , kXS , kI, kGeneral, "Shift Right Algebraic Doubleword Immediate" , (PPCOpcodeField::kRS,PPCOpcodeField::kSH), (PPCOpcodeField::kRA,PPCOpcodeField::kCRcond,PPCOpcodeField::kCA), PrintDisasm_sradix),

1
src/xenia/cpu/ppc/ppc_opcode_info.h
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@ -131,6 +131,7 @@ enum class PPCOpcodeField : uint32_t {
kME,
kMB,
kTO,
kLEV,
};
struct PPCOpcodeDisasmInfo {

3
tools/ppc-instructions.xml
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@ -1083,7 +1083,8 @@
<disasm>rlwnm[Rc] [RA], [RS], [RB], [MB], [ME]</disasm>
</insn>
<insn mnem="sc" opcode="44000002" form="SC" group="b" desc="System Call" sync="true">
<disasm>sc</disasm>
<in field="LEV" />
<disasm>sc [LEV]</disasm>
</insn>
<insn mnem="sldx" opcode="7c000036" form="X" group="i" desc="Shift Left Doubleword">
<in field="RS" />

2
tools/ppc-table-gen
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@ -270,6 +270,8 @@ def generate_token_append(i, token):
return 'str->AppendFormat(d.%s.%s() < 0 ? "-0x%%X" : "0x%%X", std::abs(d.%s.%s()));' % (i.o_form, token, i.o_form, token)
elif token == 'ADDR':
return 'str->AppendFormat("0x%%X", d.%s.%s());' % (i.o_form, token)
elif token == 'LEV':
return 'if (d.%s.%s()) str->AppendFormat("%%d", d.%s.%s());' % (i.o_form, token, i.o_form, token)
return 'str->AppendFormat("(UNHANDLED %s)");' % token