Adding instruction table and basic PPC state.

Can decode a single instruction.
2013-01-13 21:25:28 -08:00
parent 099e37490a
commit bfec194533
12 changed files with 715 additions and 3 deletions
--- a/include/xenia/cpu/ppc/instr.h
+++ b/include/xenia/cpu/ppc/instr.h
@@ -0,0 +1,137 @@
+/**
+ ******************************************************************************
+ * Xenia : Xbox 360 Emulator Research Project                                 *
+ ******************************************************************************
+ * Copyright 2013 Ben Vanik. All rights reserved.                             *
+ * Released under the BSD license - see LICENSE in the root for more details. *
+ ******************************************************************************
+ */
+
+#ifndef XENIA_CPU_PPC_INSTR_H_
+#define XENIA_CPU_PPC_INSTR_H_
+
+#include <xenia/common.h>
+
+
+typedef enum {
+  kXEPPCInstrFormatI    = 0,
+  kXEPPCInstrFormatB    = 1,
+  kXEPPCInstrFormatSC   = 2,
+  kXEPPCInstrFormatD    = 3,
+  kXEPPCInstrFormatDS   = 4,
+  kXEPPCInstrFormatX    = 5,
+  kXEPPCInstrFormatXL   = 6,
+  kXEPPCInstrFormatXFX  = 7,
+  kXEPPCInstrFormatXFL  = 8,
+  kXEPPCInstrFormatXS   = 9,
+  kXEPPCInstrFormatXO   = 10,
+  kXEPPCInstrFormatA    = 11,
+  kXEPPCInstrFormatM    = 12,
+  kXEPPCInstrFormatMD   = 13,
+  kXEPPCInstrFormatMDS  = 14,
+  kXEPPCInstrFormatVA   = 15,
+  kXEPPCInstrFormatVX   = 16,
+  kXEPPCInstrFormatVXR  = 17,
+} xe_ppc_instr_format_e;
+
+typedef enum {
+  kXEPPCInstrTypeGeneral      = (1 << 0),
+  kXEPPCInstrTypeBranch       = (1 << 1),
+  kXEPPCInstrTypeBranchCond   = kXEPPCInstrTypeBranch | (1 << 2),
+  kXEPPCInstrTypeBranchAlways = kXEPPCInstrTypeBranch | (1 << 3),
+  kXEPPCInstrTypeSyscall      = (1 << 4),
+} xe_ppc_instr_type_e;
+
+typedef enum {
+  kXEPPCInstrFlagReserved     = 0,
+} xe_ppc_instr_flag_e;
+
+
+struct xe_ppc_instr_type;
+typedef struct xe_ppc_instr_type xe_ppc_instr_type_t;
+
+
+typedef struct {
+  xe_ppc_instr_type_t *type;
+  uint32_t            address;
+
+  union {
+    uint32_t          code;
+
+    // kXEPPCInstrFormatI
+    struct {
+      uint32_t        LK      : 1;
+      uint32_t        AA      : 1;
+      uint32_t        LI      : 24;
+      uint32_t        OPCD    : 6;
+    } I;
+    // kXEPPCInstrFormatB
+    struct {
+      uint32_t        LK      : 1;
+      uint32_t        AA      : 1;
+      uint32_t        BD      : 14;
+      uint32_t        BI      : 5;
+      uint32_t        BO      : 5;
+      uint32_t        OPCD    : 6;
+    } B;
+
+    // kXEPPCInstrFormatSC
+    struct {
+      uint32_t        SIMM    : 16;
+      uint32_t        A       : 5;
+      uint32_t        D       : 5;
+      uint32_t        OPCD    : 6;
+    } D;
+    // kXEPPCInstrFormatDS
+    struct {
+      uint32_t                : 2;
+      uint32_t        ds      : 14;
+      uint32_t        A       : 5;
+      uint32_t        S       : 5;
+      uint32_t        OPCD    : 6;
+    } DS;
+    // kXEPPCInstrFormatX
+    // kXEPPCInstrFormatXL
+    struct {
+      uint32_t                : 1;
+      uint32_t                : 10;
+      uint32_t        spr     : 10;
+      uint32_t        D       : 5;
+      uint32_t        OPCD    : 6;
+    } XFX;
+    // kXEPPCInstrFormatXFL
+    // kXEPPCInstrFormatXS
+    // kXEPPCInstrFormatXO
+    // kXEPPCInstrFormatA
+    // kXEPPCInstrFormatM
+    // kXEPPCInstrFormatMD
+    // kXEPPCInstrFormatMDS
+    // kXEPPCInstrFormatVA
+    // kXEPPCInstrFormatVX
+    // kXEPPCInstrFormatVXR
+  } data;
+} xe_ppc_instr_t;
+
+typedef struct {
+  xe_ppc_instr_t      instr;
+
+  // TODO(benvanik): registers changed, special bits, etc
+} xe_ppc_dec_instr_t;
+
+typedef int (*xe_ppc_emit_fn)(/* emit context */ xe_ppc_instr_t *instr);
+
+struct xe_ppc_instr_type {
+  uint32_t            opcode;
+  uint32_t            format;   // xe_ppc_instr_format_e
+  uint32_t            type;     // xe_ppc_instr_type_e
+  uint32_t            flags;    // xe_ppc_instr_flag_e
+  char                name[16];
+
+  xe_ppc_emit_fn      emit;
+};
+
+xe_ppc_instr_type_t *xe_ppc_get_instr_type(uint32_t code);
+int xe_ppc_register_instr_emit(uint32_t code, xe_ppc_emit_fn emit);
+
+#endif  // XENIA_CPU_PPC_INSTR_H_
+