vm_ppc_new.c

quakeIII源码这个不用我多说吧

/*
===========================================================================
Copyright (C) 1999-2005 Id Software, Inc.

This file is part of Quake III Arena source code.

Quake III Arena source code is free software; you can redistribute it
and/or modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of the License,
or (at your option) any later version.

Quake III Arena source code is distributed in the hope that it will be
useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with Foobar; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
===========================================================================
*/
// vm_ppc.c
// ppc dynamic compiler

#include "vm_local.h"

#pragma opt_pointer_analysis off

#define DEBUG_VM 0

#if DEBUG_VM
static char	*opnames[256] = {
	"OP_UNDEF", 

	"OP_IGNORE", 

	"OP_BREAK",

	"OP_ENTER",
	"OP_LEAVE",
	"OP_CALL",
	"OP_PUSH",
	"OP_POP",

	"OP_CONST",

	"OP_LOCAL",

	"OP_JUMP",

	//-------------------

	"OP_EQ",
	"OP_NE",

	"OP_LTI",
	"OP_LEI",
	"OP_GTI",
	"OP_GEI",

	"OP_LTU",
	"OP_LEU",
	"OP_GTU",
	"OP_GEU",

	"OP_EQF",
	"OP_NEF",

	"OP_LTF",
	"OP_LEF",
	"OP_GTF",
	"OP_GEF",

	//-------------------

	"OP_LOAD1",
	"OP_LOAD2",
	"OP_LOAD4",
	"OP_STORE1",
	"OP_STORE2",
	"OP_STORE4",
	"OP_ARG",

	"OP_BLOCK_COPY",

	//-------------------

	"OP_SEX8",
	"OP_SEX16",

	"OP_NEGI",
	"OP_ADD",
	"OP_SUB",
	"OP_DIVI",
	"OP_DIVU",
	"OP_MODI",
	"OP_MODU",
	"OP_MULI",
	"OP_MULU",

	"OP_BAND",
	"OP_BOR",
	"OP_BXOR",
	"OP_BCOM",

	"OP_LSH",
	"OP_RSHI",
	"OP_RSHU",

	"OP_NEGF",
	"OP_ADDF",
	"OP_SUBF",
	"OP_DIVF",
	"OP_MULF",

	"OP_CVIF",
	"OP_CVFI"
};
#endif

typedef enum {
    R_REAL_STACK = 1,
	// registers 3-11 are the parameter passing registers
	
	// state
	R_STACK = 3,			// local
	R_OPSTACK,				// global

	// constants	
	R_MEMBASE,			// global
	R_MEMMASK,
	R_ASMCALL,			// global
    R_INSTRUCTIONS,		// global
    R_NUM_INSTRUCTIONS,	// global
    R_CVM,				// currentVM
    
	// temps
	R_TOP = 11,
	R_SECOND = 12,
	R_EA = 2				// effective address calculation
	 
} regNums_t;

#define	RG_REAL_STACK		r1
#define	RG_STACK			r3
#define	RG_OPSTACK			r4
#define	RG_MEMBASE			r5
#define	RG_MEMMASK			r6
#define	RG_ASMCALL			r7
#define	RG_INSTRUCTIONS		r8
#define	RG_NUM_INSTRUCTIONS	r9
#define	RG_CVM				r10
#define	RG_TOP				r12
#define	RG_SECOND			r13
#define	RG_EA 				r14

// The deepest value I saw in the Quake3 games was 9.
#define OP_STACK_MAX_DEPTH	12

// These are all volatile and thus must be saved
// upon entry to the VM code.
static int opStackIntRegisters[OP_STACK_MAX_DEPTH] =
{
	16, 17, 18, 19,
	20, 21, 22, 23,
	24, 25, 26, 27
};

static unsigned int *opStackLoadInstructionAddr[OP_STACK_MAX_DEPTH];

// We use different registers for the floating point
// operand stack (these are volatile in the PPC ABI)
static int opStackFloatRegisters[OP_STACK_MAX_DEPTH] =
{
	0, 1, 2, 3,
	4, 5, 6, 7,
	8, 9, 10, 11
};

static int opStackRegType[OP_STACK_MAX_DEPTH] =
{
	0, 0, 0, 0,
	0, 0, 0, 0,
	0, 0, 0, 0
};

// this doesn't have the low order bits set for instructions i'm not using...
typedef enum {
	PPC_TDI		= 0x08000000,
	PPC_TWI		= 0x0c000000,
	PPC_MULLI	= 0x1c000000,
	PPC_SUBFIC	= 0x20000000,
	PPC_CMPI	= 0x28000000,
	PPC_CMPLI	= 0x2c000000,
	PPC_ADDIC	= 0x30000000,
	PPC_ADDIC_	= 0x34000000,
	PPC_ADDI	= 0x38000000,
	PPC_ADDIS	= 0x3c000000,
	PPC_BC		= 0x40000000,
	PPC_SC		= 0x44000000,
	PPC_B		= 0x48000000,

	PPC_MCRF	= 0x4c000000,
	PPC_BCLR	= 0x4c000020,
	PPC_RFID	= 0x4c000000,
	PPC_CRNOR	= 0x4c000000,
	PPC_RFI		= 0x4c000000,
	PPC_CRANDC	= 0x4c000000,
	PPC_ISYNC	= 0x4c000000,
	PPC_CRXOR	= 0x4c000000,
	PPC_CRNAND	= 0x4c000000,
	PPC_CREQV	= 0x4c000000,
	PPC_CRORC	= 0x4c000000,
	PPC_CROR	= 0x4c000000,
//------------
	PPC_BCCTR	= 0x4c000420,
	PPC_RLWIMI	= 0x50000000,
	PPC_RLWINM	= 0x54000000,
	PPC_RLWNM	= 0x5c000000,
	PPC_ORI		= 0x60000000,
	PPC_ORIS	= 0x64000000,
	PPC_XORI	= 0x68000000,
	PPC_XORIS	= 0x6c000000,
	PPC_ANDI_	= 0x70000000,
	PPC_ANDIS_	= 0x74000000,
	PPC_RLDICL	= 0x78000000,
	PPC_RLDICR	= 0x78000000,
	PPC_RLDIC	= 0x78000000,
	PPC_RLDIMI	= 0x78000000,
	PPC_RLDCL	= 0x78000000,
	PPC_RLDCR	= 0x78000000,
	PPC_CMP		= 0x7c000000,
	PPC_TW		= 0x7c000000,
	PPC_SUBFC	= 0x7c000010,
	PPC_MULHDU	= 0x7c000000,
	PPC_ADDC	= 0x7c000014,
	PPC_MULHWU	= 0x7c000000,
	PPC_MFCR	= 0x7c000000,
	PPC_LWAR	= 0x7c000000,
	PPC_LDX		= 0x7c000000,
	PPC_LWZX	= 0x7c00002e,
	PPC_SLW		= 0x7c000030,
	PPC_CNTLZW	= 0x7c000000,
	PPC_SLD		= 0x7c000000,
	PPC_AND		= 0x7c000038,
	PPC_CMPL	= 0x7c000040,
	PPC_SUBF	= 0x7c000050,
	PPC_LDUX	= 0x7c000000,
//------------
	PPC_DCBST	= 0x7c000000,
	PPC_LWZUX	= 0x7c00006c,
	PPC_CNTLZD	= 0x7c000000,
	PPC_ANDC	= 0x7c000000,
	PPC_TD		= 0x7c000000,
	PPC_MULHD	= 0x7c000000,
	PPC_MULHW	= 0x7c000000,
	PPC_MTSRD	= 0x7c000000,
	PPC_MFMSR	= 0x7c000000,
	PPC_LDARX	= 0x7c000000,
	PPC_DCBF	= 0x7c000000,
	PPC_LBZX	= 0x7c0000ae,
	PPC_NEG		= 0x7c000000,
	PPC_MTSRDIN	= 0x7c000000,
	PPC_LBZUX	= 0x7c000000,
	PPC_NOR		= 0x7c0000f8,
	PPC_SUBFE	= 0x7c000000,
	PPC_ADDE	= 0x7c000000,
	PPC_MTCRF	= 0x7c000000,
	PPC_MTMSR	= 0x7c000000,
	PPC_STDX	= 0x7c000000,
	PPC_STWCX_	= 0x7c000000,
	PPC_STWX	= 0x7c00012e,
	PPC_MTMSRD	= 0x7c000000,
	PPC_STDUX	= 0x7c000000,
	PPC_STWUX	= 0x7c00016e,
	PPC_SUBFZE	= 0x7c000000,
	PPC_ADDZE	= 0x7c000000,
	PPC_MTSR	= 0x7c000000,
	PPC_STDCX_	= 0x7c000000,
	PPC_STBX	= 0x7c0001ae,
	PPC_SUBFME	= 0x7c000000,
	PPC_MULLD	= 0x7c000000,
//------------
	PPC_ADDME	= 0x7c000000,
	PPC_MULLW	= 0x7c0001d6,
	PPC_MTSRIN	= 0x7c000000,
	PPC_DCBTST	= 0x7c000000,
	PPC_STBUX	= 0x7c000000,
	PPC_ADD		= 0x7c000214,
	PPC_DCBT	= 0x7c000000,
	PPC_LHZX	= 0x7c00022e,
	PPC_EQV		= 0x7c000000,
	PPC_TLBIE	= 0x7c000000,
	PPC_ECIWX	= 0x7c000000,
	PPC_LHZUX	= 0x7c000000,
	PPC_XOR		= 0x7c000278,
	PPC_MFSPR	= 0x7c0002a6,
	PPC_LWAX	= 0x7c000000,
	PPC_LHAX	= 0x7c000000,
	PPC_TLBIA	= 0x7c000000,
	PPC_MFTB	= 0x7c000000,
	PPC_LWAUX	= 0x7c000000,
	PPC_LHAUX	= 0x7c000000,
	PPC_STHX	= 0x7c00032e,
	PPC_ORC		= 0x7c000338,
	PPC_SRADI	= 0x7c000000,
	PPC_SLBIE	= 0x7c000000,
	PPC_ECOWX	= 0x7c000000,
	PPC_STHUX	= 0x7c000000,
	PPC_OR		= 0x7c000378,
	PPC_DIVDU	= 0x7c000000,
	PPC_DIVWU	= 0x7c000396,
	PPC_MTSPR	= 0x7c0003a6,
	PPC_DCBI	= 0x7c000000,
	PPC_NAND	= 0x7c000000,
	PPC_DIVD	= 0x7c000000,
//------------
	PPC_DIVW	= 0x7c0003d6,
	PPC_SLBIA	= 0x7c000000,
	PPC_MCRXR	= 0x7c000000,
	PPC_LSWX	= 0x7c000000,
	PPC_LWBRX	= 0x7c000000,
	PPC_LFSX	= 0x7c00042e,
	PPC_SRW		= 0x7c000430,
	PPC_SRD		= 0x7c000000,
	PPC_TLBSYNC	= 0x7c000000,
	PPC_LFSUX	= 0x7c000000,
	PPC_MFSR	= 0x7c000000,
	PPC_LSWI	= 0x7c000000,
	PPC_SYNC	= 0x7c000000,
	PPC_LFDX	= 0x7c000000,
	PPC_LFDUX	= 0x7c000000,
	PPC_MFSRIN	= 0x7c000000,
	PPC_STSWX	= 0x7c000000,
	PPC_STWBRX	= 0x7c000000,
	PPC_STFSX	= 0x7c00052e,
	PPC_STFSUX	= 0x7c000000,
	PPC_STSWI	= 0x7c000000,
	PPC_STFDX	= 0x7c000000,
	PPC_DCBA	= 0x7c000000,
	PPC_STFDUX	= 0x7c000000,
	PPC_LHBRX	= 0x7c000000,
	PPC_SRAW	= 0x7c000630,
	PPC_SRAD	= 0x7c000000,
	PPC_SRAWI	= 0x7c000000,
	PPC_EIEIO	= 0x7c000000,
	PPC_STHBRX	= 0x7c000000,
	PPC_EXTSH	= 0x7c000734,
	PPC_EXTSB	= 0x7c000774,
	PPC_ICBI	= 0x7c000000,
//------------
	PPC_STFIWX	= 0x7c0007ae,
	PPC_EXTSW	= 0x7c000000,
	PPC_DCBZ	= 0x7c000000,
	PPC_LWZ		= 0x80000000,
	PPC_LWZU	= 0x84000000,
	PPC_LBZ		= 0x88000000,
	PPC_LBZU	= 0x8c000000,
	PPC_STW		= 0x90000000,
	PPC_STWU	= 0x94000000,
	PPC_STB		= 0x98000000,
	PPC_STBU	= 0x9c000000,
	PPC_LHZ		= 0xa0000000,
	PPC_LHZU	= 0xa4000000,
	PPC_LHA		= 0xa8000000,
	PPC_LHAU	= 0xac000000,
	PPC_STH		= 0xb0000000,
	PPC_STHU	= 0xb4000000,
	PPC_LMW		= 0xb8000000,
	PPC_STMW	= 0xbc000000,
	PPC_LFS		= 0xc0000000,
	PPC_LFSU	= 0xc4000000,
	PPC_LFD		= 0xc8000000,
	PPC_LFDU	= 0xcc000000,
	PPC_STFS	= 0xd0000000,
	PPC_STFSU	= 0xd4000000,
	PPC_STFD	= 0xd8000000,
	PPC_STFDU	= 0xdc000000,
	PPC_LD		= 0xe8000000,
	PPC_LDU		= 0xe8000001,
	PPC_LWA		= 0xe8000002,
	PPC_FDIVS	= 0xec000024,
	PPC_FSUBS	= 0xec000028,
	PPC_FADDS	= 0xec00002a,
//------------
	PPC_FSQRTS	= 0xec000000,
	PPC_FRES	= 0xec000000,
	PPC_FMULS	= 0xec000032,