167 lines
4.1 KiB
C++
167 lines
4.1 KiB
C++
/**
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******************************************************************************
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* Xenia : Xbox 360 Emulator Research Project *
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******************************************************************************
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* Copyright 2013 Ben Vanik. All rights reserved. *
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* Released under the BSD license - see LICENSE in the root for more details. *
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******************************************************************************
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*/
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#ifndef XENIA_CPU_PPC_INSTR_H_
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#define XENIA_CPU_PPC_INSTR_H_
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#include <xenia/common.h>
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namespace xe {
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namespace cpu {
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namespace ppc {
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// TODO(benvanik): rename these
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typedef enum {
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kXEPPCInstrFormatI = 0,
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kXEPPCInstrFormatB = 1,
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kXEPPCInstrFormatSC = 2,
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kXEPPCInstrFormatD = 3,
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kXEPPCInstrFormatDS = 4,
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kXEPPCInstrFormatX = 5,
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kXEPPCInstrFormatXL = 6,
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kXEPPCInstrFormatXFX = 7,
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kXEPPCInstrFormatXFL = 8,
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kXEPPCInstrFormatXS = 9,
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kXEPPCInstrFormatXO = 10,
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kXEPPCInstrFormatA = 11,
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kXEPPCInstrFormatM = 12,
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kXEPPCInstrFormatMD = 13,
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kXEPPCInstrFormatMDS = 14,
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kXEPPCInstrFormatVA = 15,
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kXEPPCInstrFormatVX = 16,
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kXEPPCInstrFormatVXR = 17,
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} xe_ppc_instr_format_e;
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typedef enum {
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kXEPPCInstrTypeGeneral = (1 << 0),
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kXEPPCInstrTypeBranch = (1 << 1),
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kXEPPCInstrTypeBranchCond = kXEPPCInstrTypeBranch | (1 << 2),
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kXEPPCInstrTypeBranchAlways = kXEPPCInstrTypeBranch | (1 << 3),
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kXEPPCInstrTypeSyscall = (1 << 4),
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} xe_ppc_instr_type_e;
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typedef enum {
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kXEPPCInstrFlagReserved = 0,
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} xe_ppc_instr_flag_e;
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class InstrType;
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static inline int32_t XEEXTS16(uint32_t v) {
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return (int32_t)((int16_t)v);
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}
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static inline int32_t XEEXTS26(uint32_t v) {
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return v & 0x02000000 ? (int32_t)v | 0xFC000000 : (int32_t)(v);
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}
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typedef struct {
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InstrType* type;
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uint32_t address;
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union {
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uint32_t code;
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// kXEPPCInstrFormatI
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struct {
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uint32_t LK : 1;
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uint32_t AA : 1;
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uint32_t LI : 24;
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uint32_t OPCD : 6;
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} I;
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// kXEPPCInstrFormatB
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struct {
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uint32_t LK : 1;
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uint32_t AA : 1;
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uint32_t BD : 14;
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uint32_t BI : 5;
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uint32_t BO : 5;
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uint32_t OPCD : 6;
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} B;
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// kXEPPCInstrFormatSC
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struct {
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uint32_t SIMM : 16;
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uint32_t A : 5;
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uint32_t D : 5;
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uint32_t OPCD : 6;
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} D;
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// kXEPPCInstrFormatDS
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struct {
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uint32_t : 2;
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uint32_t ds : 14;
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uint32_t A : 5;
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uint32_t S : 5;
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uint32_t OPCD : 6;
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} DS;
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// kXEPPCInstrFormatX
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// kXEPPCInstrFormatXL
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struct {
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uint32_t LK : 1;
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uint32_t : 10;
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uint32_t BB : 5;
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uint32_t BI : 5;
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uint32_t BO : 5;
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uint32_t OPCD : 6;
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} XL;
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struct {
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uint32_t : 1;
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uint32_t : 10;
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uint32_t spr : 10;
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uint32_t D : 5;
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uint32_t OPCD : 6;
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} XFX;
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// kXEPPCInstrFormatXFL
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// kXEPPCInstrFormatXS
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// kXEPPCInstrFormatXO
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// kXEPPCInstrFormatA
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// kXEPPCInstrFormatM
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// kXEPPCInstrFormatMD
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// kXEPPCInstrFormatMDS
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// kXEPPCInstrFormatVA
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// kXEPPCInstrFormatVX
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// kXEPPCInstrFormatVXR
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};
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} InstrData;
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class Instr {
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public:
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InstrData instr;
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// TODO(benvanik): registers changed, special bits, etc
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};
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typedef int (*InstrEmitFn)(/* emit context */ Instr* instr);
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class InstrType {
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public:
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uint32_t opcode;
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uint32_t format; // xe_ppc_instr_format_e
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uint32_t type; // xe_ppc_instr_type_e
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uint32_t flags; // xe_ppc_instr_flag_e
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char name[16];
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InstrEmitFn emit;
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};
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InstrType* GetInstrType(uint32_t code);
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int RegisterInstrEmit(uint32_t code, InstrEmitFn emit);
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} // namespace ppc
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} // namespace cpu
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} // namespace xe
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#endif // XENIA_CPU_PPC_INSTR_H_
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