diff options
Diffstat (limited to 'src/qcommon/vm_ppc.c')
| -rw-r--r-- | src/qcommon/vm_ppc.c | 2065 |
1 files changed, 2065 insertions, 0 deletions
diff --git a/src/qcommon/vm_ppc.c b/src/qcommon/vm_ppc.c new file mode 100644 index 0000000..460fe42 --- /dev/null +++ b/src/qcommon/vm_ppc.c @@ -0,0 +1,2065 @@ +/* +=========================================================================== +Copyright (C) 1999-2005 Id Software, Inc. +Copyright (C) 2000-2006 Tim Angus + +This file is part of Tremulous. + +Tremulous 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. + +Tremulous 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 Tremulous; 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" +#include <sys/mman.h> + +#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 16 + +// These are all volatile and thus must be saved upon entry to the VM code. +// NOTE: These are General Purpose Registers (GPR) numbers like the +// R_ definitions in the regNums_t enum above (31 is the max) +static int opStackIntRegisters[OP_STACK_MAX_DEPTH] = +{ + 16, 17, 18, 19, + 20, 21, 22, 23, + 24, 25, 26, 27, + 28, 29, 30, 31 +}; + +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) +// NOTE: these are Floating Point Register (FPR) numbers, not +// General Purpose Register (GPR) numbers +static int opStackFloatRegisters[OP_STACK_MAX_DEPTH] = +{ + 0, 1, 2, 3, + 4, 5, 6, 7, + 8, 9, 10, 11, + 12, 13, 14, 15 +}; + +static int opStackRegType[OP_STACK_MAX_DEPTH] = +{ + 0, 0, 0, 0, + 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, + PPC_FMSUBS = 0xec000000, + PPC_FMADDS = 0xec000000, + PPC_FNMSUBS = 0xec000000, + PPC_FNMADDS = 0xec000000, + PPC_STD = 0xf8000000, + PPC_STDU = 0xf8000001, + PPC_FCMPU = 0xfc000000, + PPC_FRSP = 0xfc000018, + PPC_FCTIW = 0xfc000000, + PPC_FCTIWZ = 0xfc00001e, + PPC_FDIV = 0xfc000000, + PPC_FSUB = 0xfc000028, + PPC_FADD = 0xfc000000, + PPC_FSQRT = 0xfc000000, + PPC_FSEL = 0xfc000000, + PPC_FMUL = 0xfc000000, + PPC_FRSQRTE = 0xfc000000, + PPC_FMSUB = 0xfc000000, + PPC_FMADD = 0xfc000000, + PPC_FNMSUB = 0xfc000000, + PPC_FNMADD = 0xfc000000, + PPC_FCMPO = 0xfc000000, + PPC_MTFSB1 = 0xfc000000, + PPC_FNEG = 0xfc000050, + PPC_MCRFS = 0xfc000000, + PPC_MTFSB0 = 0xfc000000, + PPC_FMR = 0xfc000000, + PPC_MTFSFI = 0xfc000000, + PPC_FNABS = 0xfc000000, + PPC_FABS = 0xfc000000, +//------------ + PPC_MFFS = 0xfc000000, + PPC_MTFSF = 0xfc000000, + PPC_FCTID = 0xfc000000, + PPC_FCTIDZ = 0xfc000000, + PPC_FCFID = 0xfc000000 + +} ppcOpcodes_t; + + +// the newly generated code +static unsigned *buf; +static int compiledOfs; // in dwords +static int pass; + +// fromt the original bytecode +static byte *code; +static int pc; + +void AsmCall( void ); + +double itofConvert[2]; + +static int Constant4( void ) { + int v; + + v = code[pc] | (code[pc+1]<<8) | (code[pc+2]<<16) | (code[pc+3]<<24); + pc += 4; + return v; +} + +static int Constant1( void ) { + int v; + + v = code[pc]; + pc += 1; + return v; +} + +static void Emit4( char *opname, int i ) { + #if DEBUG_VM + if(pass == 1) + printf("\t\t\t%p %s\t%08lx\n",&buf[compiledOfs],opname,i&0x3ffffff); + #endif + buf[ compiledOfs ] = i; + compiledOfs++; +} + +static void Inst( char *opname, int opcode, int destReg, int aReg, int bReg ) { + unsigned r; + + #if DEBUG_VM + if(pass == 1) + printf("\t\t\t%p %s\tr%d,r%d,r%d\n",&buf[compiledOfs],opname,destReg,aReg,bReg); + #endif + r = opcode | ( destReg << 21 ) | ( aReg << 16 ) | ( bReg << 11 ) ; + buf[ compiledOfs ] = r; + compiledOfs++; +} + +static void Inst4( char *opname, int opcode, int destReg, int aReg, int bReg, int cReg ) { + unsigned r; + + #if DEBUG_VM + if(pass == 1) + printf("\t\t\t%p %s\tr%d,r%d,r%d,r%d\n",&buf[compiledOfs],opname,destReg,aReg,bReg,cReg); + #endif + r = opcode | ( destReg << 21 ) | ( aReg << 16 ) | ( bReg << 11 ) | ( cReg << 6 ); + buf[ compiledOfs ] = r; + compiledOfs++; +} + +static void InstImm( char *opname, int opcode, int destReg, int aReg, int immediate ) { + unsigned r; + + if ( immediate > 32767 || immediate < -32768 ) { + Com_Error( ERR_FATAL, "VM_Compile: immediate value %i out of range, opcode %x,%d,%d", immediate, opcode, destReg, aReg ); + } + #if DEBUG_VM + if(pass == 1) + printf("\t\t\t%p %s\tr%d,r%d,0x%x\n",&buf[compiledOfs],opname,destReg,aReg,immediate); + #endif + r = opcode | ( destReg << 21 ) | ( aReg << 16 ) | ( immediate & 0xffff ); + buf[ compiledOfs ] = r; + compiledOfs++; +} + +static void InstImmU( char *opname, int opcode, int destReg, int aReg, int immediate ) { + unsigned r; + + if ( immediate > 0xffff || immediate < 0 ) { + Com_Error( ERR_FATAL, "VM_Compile: immediate value %i out of range", immediate ); + } + #if DEBUG_VM + if(pass == 1) + printf("\t\t\t%p %s\tr%d,r%d,0x%x\n",&buf[compiledOfs],opname,destReg,aReg,immediate); + #endif + r = opcode | ( destReg << 21 ) | ( aReg << 16 ) | ( immediate & 0xffff ); + buf[ compiledOfs ] = r; + compiledOfs++; +} + +static int pop0, pop1, oc0, oc1; +static vm_t *tvm; +static int instruction; +static byte *jused; + +static void spillOpStack(int depth) +{ + // Store out each register on the operand stack to it's correct location. + int i; + + for(i = 0; i < depth; i++) + { + assert(opStackRegType[i]); + assert(opStackRegType[i] == 1); + switch(opStackRegType[i]) + { + case 1: // Integer register + InstImm( "stw", PPC_STW, opStackIntRegisters[i], R_OPSTACK, i*4+4); + break; + case 2: // Float register + InstImm( "stfs", PPC_STFS, opStackFloatRegisters[i], R_OPSTACK, i*4+4); + break; + } + opStackRegType[i] = 0; + } +} + +static void loadOpStack(int depth) +{ + // Back off operand stack pointer and reload all operands. +// InstImm( "addi", PPC_ADDI, R_OPSTACK, R_OPSTACK, -(depth)*4 ); + + int i; + + for(i = 0; i < depth; i++) + { + assert(opStackRegType[i] == 0); + // For now we're stuck reloading everything as an integer. + opStackLoadInstructionAddr[i] = &buf[compiledOfs]; + InstImm( "lwz", PPC_LWZ, opStackIntRegisters[i], R_OPSTACK, i*4+4); + opStackRegType[i] = 1; + } +} + +static void makeFloat(int depth) +{ + //assert(opStackRegType[depth] == 1); + if(opStackRegType[depth] == 1) + { + unsigned instruction; + unsigned destReg, aReg, bReg, imm; + + if(opStackLoadInstructionAddr[depth]) + { + // Repatch load instruction to use LFS instead of LWZ + instruction = *opStackLoadInstructionAddr[depth]; + // Figure out if it's LWZ or LWZX + if((instruction & 0xfc000000) == PPC_LWZ) + { + //printf("patching LWZ at %p to LFS at depth %ld\n",opStackLoadInstructionAddr[depth],depth); + //printf("old instruction: %08lx\n",instruction); + // Extract registers + destReg = (instruction >> 21) & 31; + aReg = (instruction >> 16) & 31; + imm = instruction & 0xffff; + + // Calculate correct FP register to use. + // THIS ASSUMES REGISTER USAGE FOR THE STACK IS n, n+1, n+2, etc! + //printf("old dest: %ld\n",destReg); + destReg = (destReg - opStackIntRegisters[0]) + opStackFloatRegisters[0]; + instruction = PPC_LFS | ( destReg << 21 ) | ( aReg << 16 ) | imm ; + //printf("new dest: %ld\n",destReg); + //printf("new instruction: %08lx\n",instruction); + } + else + { + //printf("patching LWZX at %p to LFSX at depth %ld\n",opStackLoadInstructionAddr[depth],depth); + //printf("old instruction: %08lx\n",instruction); + // Extract registers + destReg = (instruction >> 21) & 31; + aReg = (instruction >> 16) & 31; + bReg = (instruction >> 11) & 31; + // Calculate correct FP register to use. + // THIS ASSUMES REGISTER USAGE FOR THE STACK IS n, n+1, n+2, etc! + //printf("old dest: %ld\n",destReg); + destReg = (destReg - opStackIntRegisters[0]) + opStackFloatRegisters[0]; + instruction = PPC_LFSX | ( destReg << 21 ) | ( aReg << 16 ) | ( bReg << 11 ) ; + //printf("new dest: %ld\n",destReg); + //printf("new instruction: %08lx\n",instruction); + } + *opStackLoadInstructionAddr[depth] = instruction; + opStackLoadInstructionAddr[depth] = 0; + } + else + { + //printf("doing float constant load at %p for depth %ld\n",&buf[compiledOfs],depth); + // It was likely loaded as a constant so we have to save/load it. A more + // interesting implementation might be to generate code to do a "PC relative" + // load from the VM code region. + InstImm( "stw", PPC_STW, opStackIntRegisters[depth], R_OPSTACK, depth*4+4); + // For XXX make sure we force enough NOPs to get the load into + // another dispatch group to avoid pipeline flush. + Inst( "ori", PPC_ORI, 0, 0, 0 ); + Inst( "ori", PPC_ORI, 0, 0, 0 ); + Inst( "ori", PPC_ORI, 0, 0, 0 ); + Inst( "ori", PPC_ORI, 0, 0, 0 ); + InstImm( "lfs", PPC_LFS, opStackFloatRegisters[depth], R_OPSTACK, depth*4+4); + } + opStackRegType[depth] = 2; + } +} + +// TJW: Unused +#if 0 +static void fltop() { + if (rtopped == qfalse) { + InstImm( PPC_LFS, R_TOP, R_OPSTACK, 0 ); // get value from opstack + } +} +#endif + +#if 0 +static void fltopandsecond() { + InstImm( PPC_LFS, R_TOP, R_OPSTACK, 0 ); // get value from opstack + InstImm( PPC_LFS, R_SECOND, R_OPSTACK, -4 ); // get value from opstack + InstImm( PPC_ADDI, R_OPSTACK, R_OPSTACK, -8 ); + rtopped = qfalse; + return; +} +#endif + +#define assertInteger(depth) assert(opStackRegType[depth] == 1) + +/* +================= +VM_Compile +================= +*/ +void VM_Compile( vm_t *vm, vmHeader_t *header ) { + int op; + int maxLength; + int v; + int i; + int opStackDepth; + + int mainFunction; + + // set up the into-to-float variables + ((int *)itofConvert)[0] = 0x43300000; + ((int *)itofConvert)[1] = 0x80000000; + ((int *)itofConvert)[2] = 0x43300000; + + // allocate a very large temp buffer, we will shrink it later + maxLength = header->codeLength * 8; + buf = Z_Malloc( maxLength ); + jused = Z_Malloc(header->instructionCount + 2); + Com_Memset(jused, 0, header->instructionCount+2); + + // compile everything twice, so the second pass will have valid instruction + // pointers for branches + for ( pass = -1 ; pass < 2 ; pass++ ) { + + // translate all instructions + pc = 0; + mainFunction = 0; + opStackDepth = 0; + + pop0 = 343545; + pop1 = 2443545; + oc0 = -2343535; + oc1 = 24353454; + tvm = vm; + code = (byte *)header + header->codeOffset; + compiledOfs = 0; +#ifndef __GNUC__ + // metrowerks seems to require this header in front of functions + Emit4( (int)(buf+2) ); + Emit4( 0 ); +#endif + + for ( instruction = 0 ; instruction < header->instructionCount ; instruction++ ) { + if ( compiledOfs*4 > maxLength - 16 ) { + Com_Error( ERR_DROP, "VM_Compile: maxLength exceeded" ); + } + + op = code[ pc ]; + if ( !pass ) { + vm->instructionPointers[ instruction ] = compiledOfs * 4; + } + pc++; + switch ( op ) { + case 0: + break; + case OP_BREAK: + #if DEBUG_VM + if(pass == 1) + printf("%08lx BREAK\n",instruction); + #endif + InstImmU( "addi", PPC_ADDI, R_TOP, 0, 0 ); + InstImm( "lwz", PPC_LWZ, R_TOP, R_TOP, 0 ); // *(int *)0 to crash to debugger + break; + case OP_ENTER: + opStackDepth = 0; + v = Constant4(); + #if DEBUG_VM + if(pass == 1) + printf("%08x ENTER\t%04x\n",instruction,v); + #endif + opStackRegType[opStackDepth] = 0; + mainFunction++; + if(mainFunction == 1) + { + // Main VM entry point is the first thing we compile, so save off operand stack + // registers here. This avoids issues with trying to trick the native compiler + // into doing it, and properly matches the PowerPC ABI + InstImm( "addi", PPC_ADDI, R_REAL_STACK, R_REAL_STACK, -OP_STACK_MAX_DEPTH*4 ); // sub R_STACK, R_STACK, imm + for(i = 0; i < OP_STACK_MAX_DEPTH; i++) + InstImm( "stw", PPC_STW, opStackIntRegisters[i], R_REAL_STACK, i*4); + } + InstImm( "addi", PPC_ADDI, R_STACK, R_STACK, -v ); // sub R_STACK, R_STACK, imm + break; + case OP_CONST: + v = Constant4(); + #if DEBUG_VM + if(pass == 1) + printf("%08x CONST\t%08x\n",instruction,v); + #endif + opStackLoadInstructionAddr[opStackDepth] = 0; + if ( v < 32768 && v >= -32768 ) { + InstImmU( "addi", PPC_ADDI, opStackIntRegisters[opStackDepth], 0, v & 0xffff ); + } else { + InstImmU( "addis", PPC_ADDIS, opStackIntRegisters[opStackDepth], 0, (v >> 16)&0xffff ); + if ( v & 0xffff ) { + InstImmU( "ori", PPC_ORI, opStackIntRegisters[opStackDepth], opStackIntRegisters[opStackDepth], v & 0xffff ); + } + } + opStackRegType[opStackDepth] = 1; + opStackDepth += 1; + if (code[pc] == OP_JUMP) { + jused[v] = 1; + } + break; + case OP_LOCAL: + oc1 = Constant4(); + #if DEBUG_VM + if(pass == 1) + printf("%08x LOCAL\t%08x\n",instruction,oc1); + #endif + if (code[pc] == OP_LOAD4 || code[pc] == OP_LOAD2 || code[pc] == OP_LOAD1) { + oc1 &= vm->dataMask; + } + InstImm( "addi", PPC_ADDI, opStackIntRegisters[opStackDepth], R_STACK, oc1 ); + opStackRegType[opStackDepth] = 1; + opStackLoadInstructionAddr[opStackDepth] = 0; + opStackDepth += 1; + break; + case OP_ARG: + v = Constant1(); + #if DEBUG_VM + if(pass == 1) + printf("%08x ARG \t%08x\n",instruction,v); + #endif + InstImm( "addi", PPC_ADDI, R_EA, R_STACK, v ); // location to put it + if(opStackRegType[opStackDepth-1] == 1) + Inst( "stwx", PPC_STWX, opStackIntRegisters[opStackDepth-1], R_EA, R_MEMBASE ); + else + Inst( "stfsx", PPC_STFSX, opStackFloatRegisters[opStackDepth-1], R_EA, R_MEMBASE ); + opStackRegType[opStackDepth-1] = 0; + opStackLoadInstructionAddr[opStackDepth-1] = 0; + opStackDepth -= 1; + + break; + case OP_CALL: + #if DEBUG_VM + if(pass == 1) + printf("%08x CALL\n",instruction); + #endif + assertInteger(opStackDepth-1); + assert(opStackDepth > 0); + Inst( "mflr", PPC_MFSPR, R_SECOND, 8, 0 ); // move from link register + InstImm( "stwu", PPC_STWU, R_SECOND, R_REAL_STACK, -16 ); // save off the old return address + + // Spill operand stack registers. + spillOpStack(opStackDepth); + + // We need to leave R_OPSTACK pointing to the top entry on the stack, which is the call address. + // It will be consumed (and R4 decremented) by the AsmCall code. + InstImm( "addi", PPC_ADDI, R_OPSTACK, R_OPSTACK, opStackDepth*4); + + Inst( "mtctr", PPC_MTSPR, R_ASMCALL, 9, 0 ); // move to count register + Inst( "bctrl", PPC_BCCTR | 1, 20, 0, 0 ); // jump and link to the count register + + // R4 now points to the top of the operand stack, which has the return value in it. We want to + // back off the pointer to point to the base of our local operand stack and then reload the stack. + + InstImm("addi", PPC_ADDI, R_OPSTACK, R_OPSTACK, -opStackDepth*4); + + // Reload operand stack. + loadOpStack(opStackDepth); + + InstImm( "lwz", PPC_LWZ, R_SECOND, R_REAL_STACK, 0 ); // fetch the old return address + InstImm( "addi", PPC_ADDI, R_REAL_STACK, R_REAL_STACK, 16 ); + Inst( "mtlr", PPC_MTSPR, R_SECOND, 8, 0 ); // move to link register + break; + case OP_PUSH: + #if DEBUG_VM + if(pass == 1) + printf("%08x PUSH\n",instruction); + #endif + opStackRegType[opStackDepth] = 1; // Garbage int value. + opStackDepth += 1; + break; + case OP_POP: + #if DEBUG_VM + if(pass == 1) + printf("%08x POP\n",instruction); + #endif + opStackDepth -= 1; + opStackRegType[opStackDepth] = 0; // ?? + opStackLoadInstructionAddr[opStackDepth-1] = 0; + break; + case OP_LEAVE: + #if DEBUG_VM + if(pass == 1) + printf("%08x LEAVE\n",instruction); + #endif + assert(opStackDepth == 1); + assert(opStackRegType[0] != 0); + // Save return value onto top of op stack. We also have to increment R_OPSTACK + switch(opStackRegType[0]) + { + case 1: // Integer register + InstImm( "stw", PPC_STWU, opStackIntRegisters[0], R_OPSTACK, 4); + break; + case 2: // Float register + InstImm( "stfs", PPC_STFSU, opStackFloatRegisters[0], R_OPSTACK, 4); + break; + } + InstImm( "addi", PPC_ADDI, R_STACK, R_STACK, Constant4() ); // add R_STACK, R_STACK, imm + if(mainFunction == 1) + { + for(i = 0; i < OP_STACK_MAX_DEPTH; i++) + InstImm( "lwz", PPC_LWZ, opStackIntRegisters[i], R_REAL_STACK, i*4); + InstImm( "addi", PPC_ADDI, R_REAL_STACK, R_REAL_STACK, OP_STACK_MAX_DEPTH*4 ); + } + opStackDepth--; + opStackRegType[opStackDepth] = 0; + opStackLoadInstructionAddr[opStackDepth] = 0; + Inst( "blr", PPC_BCLR, 20, 0, 0 ); // branch unconditionally to link register + break; + case OP_LOAD4: + #if DEBUG_VM + if(pass == 1) + printf("%08x LOAD4\n",instruction); + #endif + // We should try to figure out whether to use LWZX or LFSX based + // on some kind of code analysis after subsequent passes. I think what + // we could do is store the compiled load instruction address along with + // the register type. When we hit the first mismatched operator, we go back + // and patch the load. Since LCC's operand stack should be at 0 depth by the + // time we hit a branch, this should work fairly well. FIXME FIXME FIXME. + assertInteger(opStackDepth-1); + opStackLoadInstructionAddr[opStackDepth-1] = &buf[ compiledOfs ]; + Inst( "lwzx", PPC_LWZX, opStackIntRegisters[opStackDepth-1], opStackIntRegisters[opStackDepth-1], R_MEMBASE );// load from memory base + opStackRegType[opStackDepth-1] = 1; + break; + case OP_LOAD2: + #if DEBUG_VM + if(pass == 1) + printf("%08x LOAD2\n",instruction); + #endif + assertInteger(opStackDepth-1); + opStackLoadInstructionAddr[opStackDepth-1] = 0; + Inst( "lhzx", PPC_LHZX, opStackIntRegisters[opStackDepth-1], opStackIntRegisters[opStackDepth-1], R_MEMBASE );// load from memory base + opStackRegType[opStackDepth-1] = 1; + break; + case OP_LOAD1: + #if DEBUG_VM + if(pass == 1) + printf("%08x LOAD1\n",instruction); + #endif + assertInteger(opStackDepth-1); + opStackLoadInstructionAddr[opStackDepth-1] = 0; + Inst( "lbzx", PPC_LBZX, opStackIntRegisters[opStackDepth-1], opStackIntRegisters[opStackDepth-1], R_MEMBASE );// load from memory base + opStackRegType[opStackDepth-1] = 1; + break; + case OP_STORE4: + #if DEBUG_VM + if(pass == 1) + printf("%08x STORE4\n",instruction); + #endif + assertInteger(opStackDepth-2); + if(opStackRegType[opStackDepth-1] == 1) + Inst( "stwx", PPC_STWX, opStackIntRegisters[opStackDepth-1], + opStackIntRegisters[opStackDepth-2], R_MEMBASE ); // store from memory base + else + Inst( "stfsx", PPC_STFSX, opStackFloatRegisters[opStackDepth-1], + opStackIntRegisters[opStackDepth-2], R_MEMBASE ); // store from memory base + opStackRegType[opStackDepth-1] = 0; + opStackRegType[opStackDepth-2] = 0; + opStackLoadInstructionAddr[opStackDepth-1] = 0; + opStackLoadInstructionAddr[opStackDepth-2] = 0; + opStackDepth -= 2; + break; + case OP_STORE2: + #if DEBUG_VM + if(pass == 1) + printf("%08x STORE2\n",instruction); + #endif + assertInteger(opStackDepth-1); + assertInteger(opStackDepth-2); + Inst( "sthx", PPC_STHX, opStackIntRegisters[opStackDepth-1], + opStackIntRegisters[opStackDepth-2], R_MEMBASE ); // store from memory base + opStackRegType[opStackDepth-1] = 0; + opStackRegType[opStackDepth-2] = 0; + opStackLoadInstructionAddr[opStackDepth-1] = 0; + opStackLoadInstructionAddr[opStackDepth-2] = 0; + opStackDepth -= 2; + break; + case OP_STORE1: + #if DEBUG_VM + if(pass == 1) + printf("%08x STORE1\n",instruction); + #endif + assertInteger(opStackDepth-1); + assertInteger(opStackDepth-2); + Inst( "stbx", PPC_STBX, opStackIntRegisters[opStackDepth-1], + opStackIntRegisters[opStackDepth-2], R_MEMBASE ); // store from memory base + opStackRegType[opStackDepth-1] = 0; + opStackRegType[opStackDepth-2] = 0; + opStackLoadInstructionAddr[opStackDepth-1] = 0; + opStackLoadInstructionAddr[opStackDepth-2] = 0; + opStackDepth -= 2; + break; + + case OP_EQ: + #if DEBUG_VM + if(pass == 1) + printf("%08x EQ\n",instruction); + #endif + assertInteger(opStackDepth-1); + assertInteger(opStackDepth-2); + Inst( "cmp", PPC_CMP, 0, opStackIntRegisters[opStackDepth-2], opStackIntRegisters[opStackDepth-1] ); + opStackRegType[opStackDepth-1] = 0; + opStackRegType[opStackDepth-2] = 0; + opStackLoadInstructionAddr[opStackDepth-1] = 0; + opStackLoadInstructionAddr[opStackDepth-2] = 0; + opStackDepth -= 2; + i = Constant4(); + jused[i] = 1; + InstImm( "bc", PPC_BC, 4, 2, 8 ); + if ( pass==1 ) { + v = vm->instructionPointers[ i ] - (int)&buf[compiledOfs]; + } else { + v = 0; + } + Emit4("b", PPC_B | (v&0x3ffffff) ); + break; + case OP_NE: + #if DEBUG_VM + if(pass == 1) + printf("%08x NE\n",instruction); + #endif + assertInteger(opStackDepth-1); + assertInteger(opStackDepth-2); + Inst( "cmp", PPC_CMP, 0, opStackIntRegisters[opStackDepth-2], opStackIntRegisters[opStackDepth-1] ); + opStackRegType[opStackDepth-1] = 0; + opStackRegType[opStackDepth-2] = 0; + opStackLoadInstructionAddr[opStackDepth-1] = 0; + opStackLoadInstructionAddr[opStackDepth-2] = 0; + opStackDepth -= 2; + i = Constant4(); + jused[i] = 1; + InstImm( "bc", PPC_BC, 12, 2, 8 ); + if ( pass==1 ) { + v = vm->instructionPointers[ i ] - (int)&buf[compiledOfs]; + } else { + v = 0; + } + Emit4("b", PPC_B | (unsigned int)(v&0x3ffffff) ); +// InstImm( "bc", PPC_BC, 4, 2, v ); + + break; + case OP_LTI: + #if DEBUG_VM + if(pass == 1) + printf("%08x LTI\n",instruction); + #endif + assertInteger(opStackDepth-1); + assertInteger(opStackDepth-2); + Inst( "cmp", PPC_CMP, 0, opStackIntRegisters[opStackDepth-2], opStackIntRegisters[opStackDepth-1] ); + opStackRegType[opStackDepth-1] = 0; + opStackRegType[opStackDepth-2] = 0; + opStackLoadInstructionAddr[opStackDepth-1] = 0; + opStackLoadInstructionAddr[opStackDepth-2] = 0; + opStackDepth -= 2; + i = Constant4(); + jused[i] = 1; + InstImm( "bc", PPC_BC, 4, 0, 8 ); + if ( pass==1 ) { + v = vm->instructionPointers[ i ] - (int)&buf[compiledOfs]; + } else { + v = 0; + } + Emit4("b", PPC_B | (unsigned int)(v&0x3ffffff) ); +// InstImm( "bc", PPC_BC, 12, 0, v ); + break; + case OP_LEI: + #if DEBUG_VM + if(pass == 1) + printf("%08x LEI\n",instruction); + #endif + assertInteger(opStackDepth-1); + assertInteger(opStackDepth-2); + Inst( "cmp", PPC_CMP, 0, opStackIntRegisters[opStackDepth-2], opStackIntRegisters[opStackDepth-1] ); + opStackRegType[opStackDepth-1] = 0; + opStackRegType[opStackDepth-2] = 0; + opStackLoadInstructionAddr[opStackDepth-1] = 0; + opStackLoadInstructionAddr[opStackDepth-2] = 0; + opStackDepth -= 2; + i = Constant4(); + jused[i] = 1; + InstImm( "bc", PPC_BC, 12, 1, 8 ); + if ( pass==1 ) { + v = vm->instructionPointers[ i ] - (int)&buf[compiledOfs]; + } else { + v = 0; + } + Emit4("b", PPC_B | (unsigned int)(v&0x3ffffff) ); +// InstImm( "bc", PPC_BC, 4, 1, v ); + break; + case OP_GTI: + #if DEBUG_VM + if(pass == 1) + printf("%08x GTI\n",instruction); + #endif + assertInteger(opStackDepth-1); + assertInteger(opStackDepth-2); + Inst( "cmp", PPC_CMP, 0, opStackIntRegisters[opStackDepth-2], opStackIntRegisters[opStackDepth-1] ); + opStackRegType[opStackDepth-1] = 0; + opStackRegType[opStackDepth-2] = 0; + opStackLoadInstructionAddr[opStackDepth-1] = 0; + opStackLoadInstructionAddr[opStackDepth-2] = 0; + opStackDepth -= 2; + i = Constant4(); + jused[i] = 1; + InstImm( "bc", PPC_BC, 4, 1, 8 ); + if ( pass==1 ) { + v = vm->instructionPointers[ i ] - (int)&buf[compiledOfs]; + } else { + v = 0; + } + Emit4("b", PPC_B | (unsigned int)(v&0x3ffffff) ); +// InstImm( "bc", PPC_BC, 12, 1, v ); + break; + case OP_GEI: + #if DEBUG_VM + if(pass == 1) + printf("%08x GEI\n",instruction); + #endif + assertInteger(opStackDepth-1); + assertInteger(opStackDepth-2); + Inst( "cmp", PPC_CMP, 0, opStackIntRegisters[opStackDepth-2], opStackIntRegisters[opStackDepth-1] ); + opStackRegType[opStackDepth-1] = 0; + opStackRegType[opStackDepth-2] = 0; + opStackLoadInstructionAddr[opStackDepth-1] = 0; + opStackLoadInstructionAddr[opStackDepth-2] = 0; + opStackDepth -= 2; + i = Constant4(); + jused[i] = 1; + InstImm( "bc", PPC_BC, 12, 0, 8 ); + if ( pass==1 ) { + v = vm->instructionPointers[ i ] - (int)&buf[compiledOfs]; + } else { + v = 0; + } + Emit4("b", PPC_B | (unsigned int)(v&0x3ffffff) ); +// InstImm( "bc", PPC_BC, 4, 0, v ); + break; + case OP_LTU: + #if DEBUG_VM + if(pass == 1) + printf("%08x LTU\n",instruction); + #endif + assertInteger(opStackDepth-1); + assertInteger(opStackDepth-2); + Inst( "cmpl", PPC_CMPL, 0, opStackIntRegisters[opStackDepth-2], opStackIntRegisters[opStackDepth-1] ); + opStackRegType[opStackDepth-1] = 0; + opStackRegType[opStackDepth-2] = 0; + opStackLoadInstructionAddr[opStackDepth-1] = 0; + opStackLoadInstructionAddr[opStackDepth-2] = 0; + opStackDepth -= 2; + i = Constant4(); + jused[i] = 1; + InstImm( "bc", PPC_BC, 4, 0, 8 ); + if ( pass==1 ) { + v = vm->instructionPointers[ i ] - (int)&buf[compiledOfs]; + } else { + v = 0; + } + Emit4("b", PPC_B | (unsigned int)(v&0x3ffffff) ); +// InstImm( "bc", PPC_BC, 12, 0, v ); + break; + case OP_LEU: + #if DEBUG_VM + if(pass == 1) + printf("%08x LEU\n",instruction); + #endif + assertInteger(opStackDepth-1); + assertInteger(opStackDepth-2); + Inst( "cmpl", PPC_CMPL, 0, opStackIntRegisters[opStackDepth-2], opStackIntRegisters[opStackDepth-1] ); + opStackRegType[opStackDepth-1] = 0; + opStackRegType[opStackDepth-2] = 0; + opStackLoadInstructionAddr[opStackDepth-1] = 0; + opStackLoadInstructionAddr[opStackDepth-2] = 0; + opStackDepth -= 2; + i = Constant4(); + jused[i] = 1; + InstImm( "bc", PPC_BC, 12, 1, 8 ); + if ( pass==1 ) { + v = vm->instructionPointers[ i ] - (int)&buf[compiledOfs]; + } else { + v = 0; + } + Emit4("b", PPC_B | (unsigned int)(v&0x3ffffff) ); +// InstImm( "bc", PPC_BC, 4, 1, v ); + break; + case OP_GTU: + #if DEBUG_VM + if(pass == 1) + printf("%08x GTU\n",instruction); + #endif + assertInteger(opStackDepth-1); + assertInteger(opStackDepth-2); + Inst( "cmpl", PPC_CMPL, 0, opStackIntRegisters[opStackDepth-2], opStackIntRegisters[opStackDepth-1] ); + opStackRegType[opStackDepth-1] = 0; + opStackRegType[opStackDepth-2] = 0; + opStackLoadInstructionAddr[opStackDepth-1] = 0; + opStackLoadInstructionAddr[opStackDepth-2] = 0; + opStackDepth -= 2; + i = Constant4(); + jused[i] = 1; + InstImm( "bc", PPC_BC, 4, 1, 8 ); + if ( pass==1 ) { + v = vm->instructionPointers[ i ] - (int)&buf[compiledOfs]; + } else { + v = 0; + } + Emit4("b", PPC_B | (unsigned int)(v&0x3ffffff) ); +// InstImm( "bc", PPC_BC, 12, 1, v ); + break; + case OP_GEU: + #if DEBUG_VM + if(pass == 1) + printf("%08x GEU\n",instruction); + #endif + assertInteger(opStackDepth-1); + assertInteger(opStackDepth-2); + Inst( "cmpl", PPC_CMPL, 0, opStackIntRegisters[opStackDepth-2], opStackIntRegisters[opStackDepth-1] ); + opStackRegType[opStackDepth-1] = 0; + opStackRegType[opStackDepth-2] = 0; + opStackLoadInstructionAddr[opStackDepth-1] = 0; + opStackLoadInstructionAddr[opStackDepth-2] = 0; + opStackDepth -= 2; + i = Constant4(); + jused[i] = 1; + InstImm( "bc", PPC_BC, 12, 0, 8 ); + if ( pass==1 ) { + v = vm->instructionPointers[ i ] - (int)&buf[compiledOfs]; + } else { + v = 0; + } + Emit4("b", PPC_B | (unsigned int)(v&0x3ffffff) ); +// InstImm( "bc", PPC_BC, 4, 0, v ); + break; + + case OP_EQF: + #if DEBUG_VM + if(pass == 1) + printf("%08x EQF\n",instruction); + #endif + makeFloat(opStackDepth-1); + makeFloat(opStackDepth-2); + Inst( "fcmpu", PPC_FCMPU, 0, opStackFloatRegisters[opStackDepth-2], opStackFloatRegisters[opStackDepth-1] ); + opStackRegType[opStackDepth-1] = 0; + opStackRegType[opStackDepth-2] = 0; + opStackLoadInstructionAddr[opStackDepth-1] = 0; + opStackLoadInstructionAddr[opStackDepth-2] = 0; + opStackDepth -= 2; + i = Constant4(); + jused[i] = 1; + InstImm( "bc", PPC_BC, 4, 2, 8 ); + if ( pass==1 ) { + v = vm->instructionPointers[ i ] - (int)&buf[compiledOfs]; + } else { + v = 0; + } + Emit4("b", PPC_B | (unsigned int)(v&0x3ffffff) ); +// InstImm( "bc", PPC_BC, 12, 2, v ); + break; + case OP_NEF: + #if DEBUG_VM + if(pass == 1) + printf("%08x NEF\n",instruction); + #endif + makeFloat(opStackDepth-1); + makeFloat(opStackDepth-2); + Inst( "fcmpu", PPC_FCMPU, 0, opStackFloatRegisters[opStackDepth-2], opStackFloatRegisters[opStackDepth-1] ); + opStackRegType[opStackDepth-1] = 0; + opStackRegType[opStackDepth-2] = 0; + opStackLoadInstructionAddr[opStackDepth-1] = 0; + opStackLoadInstructionAddr[opStackDepth-2] = 0; + opStackDepth -= 2; + i = Constant4(); + jused[i] = 1; + InstImm( "bc", PPC_BC, 12, 2, 8 ); + if ( pass==1 ) { + v = vm->instructionPointers[ i ] - (int)&buf[compiledOfs]; + } else { + v = 0; + } + Emit4("b", PPC_B | (unsigned int)(v&0x3ffffff) ); +// InstImm( "bc", PPC_BC, 4, 2, v ); + break; + case OP_LTF: + #if DEBUG_VM + if(pass == 1) + printf("%08x LTF\n",instruction); + #endif + makeFloat(opStackDepth-1); + makeFloat(opStackDepth-2); + Inst( "fcmpu", PPC_FCMPU, 0, opStackFloatRegisters[opStackDepth-2], opStackFloatRegisters[opStackDepth-1] ); + opStackRegType[opStackDepth-1] = 0; + opStackRegType[opStackDepth-2] = 0; + opStackLoadInstructionAddr[opStackDepth-1] = 0; + opStackLoadInstructionAddr[opStackDepth-2] = 0; + opStackDepth -= 2; + i = Constant4(); + jused[i] = 1; + InstImm( "bc", PPC_BC, 4, 0, 8 ); + if ( pass==1 ) { + v = vm->instructionPointers[ i ] - (int)&buf[compiledOfs]; + } else { + v = 0; + } + Emit4("b", PPC_B | (unsigned int)(v&0x3ffffff) ); +// InstImm( "bc", PPC_BC, 12, 0, v ); + break; + case OP_LEF: + #if DEBUG_VM + if(pass == 1) + printf("%08x LEF\n",instruction); + #endif + makeFloat(opStackDepth-1); + makeFloat(opStackDepth-2); + Inst( "fcmpu", PPC_FCMPU, 0, opStackFloatRegisters[opStackDepth-2], opStackFloatRegisters[opStackDepth-1] ); + opStackRegType[opStackDepth-1] = 0; + opStackRegType[opStackDepth-2] = 0; + opStackLoadInstructionAddr[opStackDepth-1] = 0; + opStackLoadInstructionAddr[opStackDepth-2] = 0; + opStackDepth -= 2; + i = Constant4(); + jused[i] = 1; + InstImm( "bc", PPC_BC, 12, 1, 8 ); + if ( pass==1 ) { + v = vm->instructionPointers[ i ] - (int)&buf[compiledOfs]; + } else { + v = 0; + } + Emit4("b", PPC_B | (unsigned int)(v&0x3ffffff) ); +// InstImm( "bc", PPC_BC, 4, 1, v ); + break; + case OP_GTF: + #if DEBUG_VM + if(pass == 1) + printf("%08x GTF\n",instruction); + #endif + makeFloat(opStackDepth-1); + makeFloat(opStackDepth-2); + Inst( "fcmpu", PPC_FCMPU, 0, opStackFloatRegisters[opStackDepth-2], opStackFloatRegisters[opStackDepth-1] ); + opStackRegType[opStackDepth-1] = 0; + opStackRegType[opStackDepth-2] = 0; + opStackLoadInstructionAddr[opStackDepth-1] = 0; + opStackLoadInstructionAddr[opStackDepth-2] = 0; + opStackDepth -= 2; + i = Constant4(); + jused[i] = 1; + InstImm( "bc", PPC_BC, 4, 1, 8 ); + if ( pass==1 ) { + v = vm->instructionPointers[ i ] - (int)&buf[compiledOfs]; + } else { + v = 0; + } + Emit4("b", PPC_B | (unsigned int)(v&0x3ffffff) ); +// InstImm( "bc", PPC_BC, 12, 1, v ); + break; + case OP_GEF: + #if DEBUG_VM + if(pass == 1) + printf("%08x GEF\n",instruction); + #endif + makeFloat(opStackDepth-1); + makeFloat(opStackDepth-2); + Inst( "fcmpu", PPC_FCMPU, 0, opStackFloatRegisters[opStackDepth-2], opStackFloatRegisters[opStackDepth-1] ); + opStackRegType[opStackDepth-1] = 0; + opStackRegType[opStackDepth-2] = 0; + opStackLoadInstructionAddr[opStackDepth-1] = 0; + opStackLoadInstructionAddr[opStackDepth-2] = 0; + opStackDepth -= 2; + i = Constant4(); + jused[i] = 1; + InstImm( "bc", PPC_BC, 12, 0, 8 ); + if ( pass==1 ) { + v = vm->instructionPointers[ i ] - (int)&buf[compiledOfs]; + } else { + v = 0; + } + Emit4("b", PPC_B | (unsigned int)(v&0x3ffffff) ); +// InstImm( "bc", PPC_BC, 4, 0, v ); + break; + + case OP_NEGI: + #if DEBUG_VM + if(pass == 1) + printf("%08x NEGI\n",instruction); + #endif + assertInteger(opStackDepth-1); + InstImm( "subfic", PPC_SUBFIC, opStackIntRegisters[opStackDepth-1], opStackIntRegisters[opStackDepth-1], 0 ); + opStackLoadInstructionAddr[opStackDepth-1] = 0; + break; + case OP_ADD: + #if DEBUG_VM + if(pass == 1) + printf("%08x ADD\n",instruction); + #endif + assertInteger(opStackDepth-1); + assertInteger(opStackDepth-2); + Inst( "add", PPC_ADD, opStackIntRegisters[opStackDepth-2], opStackIntRegisters[opStackDepth-1], opStackIntRegisters[opStackDepth-2] ); + opStackRegType[opStackDepth-1] = 0; + opStackLoadInstructionAddr[opStackDepth-1] = 0; + opStackDepth -= 1; + break; + case OP_SUB: + #if DEBUG_VM + if(pass == 1) + printf("%08x SUB\n",instruction); + #endif + assertInteger(opStackDepth-1); + assertInteger(opStackDepth-2); + Inst( "subf", PPC_SUBF, opStackIntRegisters[opStackDepth-2], opStackIntRegisters[opStackDepth-1], opStackIntRegisters[opStackDepth-2] ); + opStackRegType[opStackDepth-1] = 0; + opStackLoadInstructionAddr[opStackDepth-1] = 0; + opStackDepth -= 1; + break; + case OP_DIVI: + #if DEBUG_VM + if(pass == 1) + printf("%08x DIVI\n",instruction); + #endif + assertInteger(opStackDepth-1); + assertInteger(opStackDepth-2); + Inst( "divw", PPC_DIVW, opStackIntRegisters[opStackDepth-2], opStackIntRegisters[opStackDepth-2], opStackIntRegisters[opStackDepth-1] ); + opStackRegType[opStackDepth-1] = 0; + opStackLoadInstructionAddr[opStackDepth-1] = 0; + opStackDepth -= 1; + break; + case OP_DIVU: + #if DEBUG_VM + if(pass == 1) + printf("%08x DIVU\n",instruction); + #endif + assertInteger(opStackDepth-1); + assertInteger(opStackDepth-2); + Inst( "divwu", PPC_DIVWU, opStackIntRegisters[opStackDepth-2], opStackIntRegisters[opStackDepth-2], opStackIntRegisters[opStackDepth-1] ); + opStackRegType[opStackDepth-1] = 0; + opStackLoadInstructionAddr[opStackDepth-1] = 0; + opStackDepth -= 1; + break; + case OP_MODI: + #if DEBUG_VM + if(pass == 1) + printf("%08x MODI\n",instruction); + #endif + assertInteger(opStackDepth-1); + assertInteger(opStackDepth-2); + Inst( "divw", PPC_DIVW, R_EA, opStackIntRegisters[opStackDepth-2], opStackIntRegisters[opStackDepth-1] ); + Inst( "mullw", PPC_MULLW, R_EA, opStackIntRegisters[opStackDepth-1], R_EA ); + Inst( "subf", PPC_SUBF, opStackIntRegisters[opStackDepth-2], R_EA, opStackIntRegisters[opStackDepth-2] ); + opStackRegType[opStackDepth-1] = 0; + opStackLoadInstructionAddr[opStackDepth-1] = 0; + opStackDepth -= 1; + break; + case OP_MODU: + #if DEBUG_VM + if(pass == 1) + printf("%08x MODU\n",instruction); + #endif + assertInteger(opStackDepth-1); + assertInteger(opStackDepth-2); + Inst( "divwu", PPC_DIVWU, R_EA, opStackIntRegisters[opStackDepth-2], opStackIntRegisters[opStackDepth-1] ); + Inst( "mullw", PPC_MULLW, R_EA, opStackIntRegisters[opStackDepth-1], R_EA ); + Inst( "subf", PPC_SUBF, opStackIntRegisters[opStackDepth-2], R_EA, opStackIntRegisters[opStackDepth-2] ); + opStackRegType[opStackDepth-1] = 0; + opStackLoadInstructionAddr[opStackDepth-1] = 0; + opStackDepth -= 1; + break; + case OP_MULI: + case OP_MULU: + #if DEBUG_VM + if(pass == 1) + printf("%08x MULI\n",instruction); + #endif + assertInteger(opStackDepth-1); + assertInteger(opStackDepth-2); + Inst( "mullw", PPC_MULLW, opStackIntRegisters[opStackDepth-2], opStackIntRegisters[opStackDepth-1], opStackIntRegisters[opStackDepth-2] ); + opStackRegType[opStackDepth-1] = 0; + opStackLoadInstructionAddr[opStackDepth-1] = 0; + opStackDepth -= 1; + break; + case OP_BAND: + #if DEBUG_VM + if(pass == 1) + printf("%08x BAND\n",instruction); + #endif + assertInteger(opStackDepth-1); + assertInteger(opStackDepth-2); + Inst( "and", PPC_AND, opStackIntRegisters[opStackDepth-2], opStackIntRegisters[opStackDepth-2], opStackIntRegisters[opStackDepth-1] ); + opStackRegType[opStackDepth-1] = 0; + opStackLoadInstructionAddr[opStackDepth-1] = 0; + opStackDepth -= 1; + break; + case OP_BOR: + #if DEBUG_VM + if(pass == 1) + printf("%08x BOR\n",instruction); + #endif + assertInteger(opStackDepth-1); + assertInteger(opStackDepth-2); + Inst( "or", PPC_OR, opStackIntRegisters[opStackDepth-2], opStackIntRegisters[opStackDepth-2], opStackIntRegisters[opStackDepth-1] ); + opStackRegType[opStackDepth-1] = 0; + opStackLoadInstructionAddr[opStackDepth-1] = 0; + opStackDepth -= 1; + break; + case OP_BXOR: + #if DEBUG_VM + if(pass == 1) + printf("%08x BXOR\n",instruction); + #endif + assertInteger(opStackDepth-1); + assertInteger(opStackDepth-2); + Inst( "xor", PPC_XOR, opStackIntRegisters[opStackDepth-2], opStackIntRegisters[opStackDepth-2], opStackIntRegisters[opStackDepth-1] ); + opStackRegType[opStackDepth-1] = 0; + opStackLoadInstructionAddr[opStackDepth-1] = 0; + opStackDepth -= 1; + break; + case OP_BCOM: + #if DEBUG_VM + if(pass == 1) + printf("%08x BCOM\n",instruction); + #endif + assertInteger(opStackDepth-1); + Inst( "nor", PPC_NOR, opStackIntRegisters[opStackDepth-1], opStackIntRegisters[opStackDepth-1], opStackIntRegisters[opStackDepth-1] ); + opStackLoadInstructionAddr[opStackDepth-1] = 0; + break; + case OP_LSH: + #if DEBUG_VM + if(pass == 1) + printf("%08x LSH\n",instruction); + #endif + assertInteger(opStackDepth-1); + assertInteger(opStackDepth-2); + Inst( "slw", PPC_SLW, opStackIntRegisters[opStackDepth-2], opStackIntRegisters[opStackDepth-2], opStackIntRegisters[opStackDepth-1] ); + opStackRegType[opStackDepth-1] = 0; + opStackLoadInstructionAddr[opStackDepth-1] = 0; + opStackDepth -= 1; + break; + case OP_RSHI: + #if DEBUG_VM + if(pass == 1) + printf("%08x RSHI\n",instruction); + #endif + assertInteger(opStackDepth-1); + assertInteger(opStackDepth-2); + Inst( "sraw", PPC_SRAW, opStackIntRegisters[opStackDepth-2], opStackIntRegisters[opStackDepth-2], opStackIntRegisters[opStackDepth-1] ); + opStackRegType[opStackDepth-1] = 0; + opStackLoadInstructionAddr[opStackDepth-1] = 0; + opStackDepth -= 1; + break; + case OP_RSHU: + #if DEBUG_VM + if(pass == 1) + printf("%08x RSHU\n",instruction); + #endif + assertInteger(opStackDepth-1); + assertInteger(opStackDepth-2); + Inst( "srw", PPC_SRW, opStackIntRegisters[opStackDepth-2], opStackIntRegisters[opStackDepth-2], opStackIntRegisters[opStackDepth-1] ); + opStackRegType[opStackDepth-1] = 0; + opStackLoadInstructionAddr[opStackDepth-1] = 0; + opStackDepth -= 1; + break; + + case OP_NEGF: + #if DEBUG_VM + if(pass == 1) + printf("%08x NEGF\n",instruction); + #endif + makeFloat(opStackDepth-1); + Inst( "fneg", PPC_FNEG, opStackFloatRegisters[opStackDepth-1], 0, opStackFloatRegisters[opStackDepth-1] ); + opStackLoadInstructionAddr[opStackDepth-1] = 0; + break; + case OP_ADDF: + #if DEBUG_VM + if(pass == 1) + printf("%08x ADDF\n",instruction); + #endif + makeFloat(opStackDepth-1); + makeFloat(opStackDepth-2); + Inst( "fadds", PPC_FADDS, opStackFloatRegisters[opStackDepth-2], opStackFloatRegisters[opStackDepth-2], opStackFloatRegisters[opStackDepth-1] ); + opStackRegType[opStackDepth-1] = 0; + opStackLoadInstructionAddr[opStackDepth-1] = 0; + opStackDepth -= 1; + break; + case OP_SUBF: + #if DEBUG_VM + if(pass == 1) + printf("%08x SUBF\n",instruction); + #endif + makeFloat(opStackDepth-1); + makeFloat(opStackDepth-2); + Inst( "fsubs", PPC_FSUBS, opStackFloatRegisters[opStackDepth-2], opStackFloatRegisters[opStackDepth-2], opStackFloatRegisters[opStackDepth-1] ); + opStackRegType[opStackDepth-1] = 0; + opStackLoadInstructionAddr[opStackDepth-1] = 0; + opStackDepth -= 1; + break; + case OP_DIVF: + #if DEBUG_VM + if(pass == 1) + printf("%08x DIVF\n",instruction); + #endif + makeFloat(opStackDepth-1); + makeFloat(opStackDepth-2); + Inst( "fdivs", PPC_FDIVS, opStackFloatRegisters[opStackDepth-2], opStackFloatRegisters[opStackDepth-2], opStackFloatRegisters[opStackDepth-1] ); + opStackRegType[opStackDepth-1] = 0; + opStackLoadInstructionAddr[opStackDepth-1] = 0; + opStackDepth -= 1; + break; + case OP_MULF: + #if DEBUG_VM + if(pass == 1) + printf("%08x MULF\n",instruction); + #endif + makeFloat(opStackDepth-1); + makeFloat(opStackDepth-2); + Inst4( "fmuls", PPC_FMULS, opStackFloatRegisters[opStackDepth-2], opStackFloatRegisters[opStackDepth-2], 0, opStackFloatRegisters[opStackDepth-1] ); + opStackRegType[opStackDepth-1] = 0; + opStackLoadInstructionAddr[opStackDepth-1] = 0; + opStackDepth -= 1; + break; + + case OP_CVIF: + #if DEBUG_VM + if(pass == 1) + printf("%08x CVIF\n",instruction); + #endif + assertInteger(opStackDepth-1); + //makeInteger(opStackDepth-1); + v = (int)&itofConvert; + InstImmU( "addis", PPC_ADDIS, R_EA, 0, (v >> 16)&0xffff ); + InstImmU( "ori", PPC_ORI, R_EA, R_EA, v & 0xffff ); + InstImmU( "xoris", PPC_XORIS, opStackIntRegisters[opStackDepth-1], opStackIntRegisters[opStackDepth-1], 0x8000 ); + InstImm( "stw", PPC_STW, opStackIntRegisters[opStackDepth-1], R_EA, 12 ); + InstImm( "lfd", PPC_LFD, opStackFloatRegisters[opStackDepth-1], R_EA, 0 ); + Inst( "ori", PPC_ORI, 0, 0, 0); + Inst( "ori", PPC_ORI, 0, 0, 0); + Inst( "ori", PPC_ORI, 0, 0, 0); + InstImm( "lfd", PPC_LFD, 13, R_EA, 8 ); + Inst( "fsub", PPC_FSUB, opStackFloatRegisters[opStackDepth-1], 13, opStackFloatRegisters[opStackDepth-1] ); + opStackRegType[opStackDepth-1] = 2; + opStackLoadInstructionAddr[opStackDepth-1] = 0; + // Inst( PPC_FRSP, R_TOP, 0, R_TOP ); + break; + case OP_CVFI: + #if DEBUG_VM + if(pass == 1) + printf("%08x CVFI\n",instruction); + #endif + makeFloat(opStackDepth-1); + + InstImm( "addi", PPC_ADDI, R_OPSTACK, R_OPSTACK, opStackDepth*4); + + Inst( "fctiwz", PPC_FCTIWZ, opStackFloatRegisters[opStackDepth-1], 0, opStackFloatRegisters[opStackDepth-1] ); + Inst( "stfiwx", PPC_STFIWX, opStackFloatRegisters[opStackDepth-1], 0, R_OPSTACK ); // save value to opstack (dummy area now) + Inst( "ori", PPC_ORI, 0, 0, 0); + Inst( "ori", PPC_ORI, 0, 0, 0); + Inst( "ori", PPC_ORI, 0, 0, 0); + Inst( "ori", PPC_ORI, 0, 0, 0); + InstImm( "lwz", PPC_LWZ, opStackIntRegisters[opStackDepth-1], R_OPSTACK, 0 ); + + InstImm( "addi", PPC_ADDI, R_OPSTACK, R_OPSTACK, -opStackDepth*4); + + opStackRegType[opStackDepth-1] = 1; + opStackLoadInstructionAddr[opStackDepth-1] = 0; + break; + case OP_SEX8: + #if DEBUG_VM + if(pass == 1) + printf("%08x SEX8\n",instruction); + #endif + assertInteger(opStackDepth-1); + Inst( "extsb", PPC_EXTSB, opStackIntRegisters[opStackDepth-1], opStackIntRegisters[opStackDepth-1], 0 ); + opStackLoadInstructionAddr[opStackDepth-1] = 0; + break; + case OP_SEX16: + #if DEBUG_VM + if(pass == 1) + printf("%08x SEX16\n",instruction); + #endif + assertInteger(opStackDepth-1); + Inst( "extsh", PPC_EXTSH, opStackIntRegisters[opStackDepth-1], opStackIntRegisters[opStackDepth-1], 0 ); + opStackLoadInstructionAddr[opStackDepth-1] = 0; + break; + + case OP_BLOCK_COPY: + v = Constant4() >> 2; + #if DEBUG_VM + if(pass == 1) + printf("%08x BLOCK_COPY\t%08lx\n",instruction,v<<2); + #endif + assert(opStackDepth >= 2); + assertInteger(opStackDepth-1); + assertInteger(opStackDepth-2); + InstImmU( "addi", PPC_ADDI, R_EA, 0, v ); // count + // FIXME: range check + Inst( "mtctr", PPC_MTSPR, R_EA, 9, 0 ); // move to count register + + Inst( "add", PPC_ADD, opStackIntRegisters[opStackDepth-1], opStackIntRegisters[opStackDepth-1], R_MEMBASE ); + InstImm( "addi", PPC_ADDI, opStackIntRegisters[opStackDepth-1], opStackIntRegisters[opStackDepth-1], -4 ); + Inst( "add", PPC_ADD, opStackIntRegisters[opStackDepth-2], opStackIntRegisters[opStackDepth-2], R_MEMBASE ); + InstImm( "addi", PPC_ADDI, opStackIntRegisters[opStackDepth-2], opStackIntRegisters[opStackDepth-2], -4 ); + + InstImm( "lwzu", PPC_LWZU, R_EA, opStackIntRegisters[opStackDepth-1], 4 ); // source + InstImm( "stwu", PPC_STWU, R_EA, opStackIntRegisters[opStackDepth-2], 4 ); // dest + Inst( "b", PPC_BC | 0xfff8 , 16, 0, 0 ); // loop + opStackRegType[opStackDepth-1] = 0; + opStackRegType[opStackDepth-2] = 0; + opStackLoadInstructionAddr[opStackDepth-1] = 0; + opStackLoadInstructionAddr[opStackDepth-2] = 0; + opStackDepth -= 2; + break; + + case OP_JUMP: + #if DEBUG_VM + if(pass == 1) + printf("%08x JUMP\n",instruction); + #endif + assert(opStackDepth == 1); + assertInteger(opStackDepth-1); + + Inst( "rlwinm", PPC_RLWINM | ( 29 << 1 ), opStackIntRegisters[opStackDepth-1], opStackIntRegisters[opStackDepth-1], 2 ); + // FIXME: range check + Inst( "lwzx", PPC_LWZX, opStackIntRegisters[opStackDepth-1], opStackIntRegisters[opStackDepth-1], R_INSTRUCTIONS ); + Inst( "mtctr", PPC_MTSPR, opStackIntRegisters[opStackDepth-1], 9, 0 ); // move to count register + Inst( "bctr", PPC_BCCTR, 20, 0, 0 ); // jump to the count register + opStackRegType[opStackDepth-1] = 0; + opStackLoadInstructionAddr[opStackDepth-1] = 0; + opStackDepth -= 1; + break; + default: + Com_Error( ERR_DROP, "VM_CompilePPC: bad opcode %i at instruction %i, offset %i", op, instruction, pc ); + } + pop0 = pop1; + pop1 = op; + assert(opStackDepth >= 0); + assert(opStackDepth < OP_STACK_MAX_DEPTH); + + //printf("%4d\t%s\n",opStackDepth,opnames[op]); + } + + Com_Printf( "VM file %s pass %d compiled to %i bytes of code\n", vm->name, (pass+1), compiledOfs*4 ); + + if ( pass == 0 ) { + // copy to an exact size buffer on the hunk + vm->codeLength = compiledOfs * 4; + vm->codeBase = Hunk_Alloc( vm->codeLength, h_low ); + Com_Memcpy( vm->codeBase, buf, vm->codeLength ); + + //printf("codeBase: %p\n",vm->codeBase); + + Z_Free( buf ); + + // offset all the instruction pointers for the new location + for ( i = 0 ; i < header->instructionCount ; i++ ) { + vm->instructionPointers[i] += (int)vm->codeBase; + //printf("%08x %08lx\n",i,vm->instructionPointers[i]); + } + + // go back over it in place now to fixup reletive jump targets + buf = (unsigned *)vm->codeBase; + } else if ( pass == 1 ) { + // clear the instruction cache for generated code + msync(vm->codeBase, vm->codeLength, MS_INVALIDATE); + } + } + if(0) + { + char buf[256]; + printf("wait..\n"); + gets(buf); + } + Z_Free( jused ); +} + +/* +============== +VM_CallCompiled + +This function is called directly by the generated code +============== +*/ +int VM_CallCompiled( vm_t *vm, int *args ) { + int stack[1024]; + int programStack; + int stackOnEntry; + byte *image; + + currentVM = vm; + + //printf("VM_CallCompiled: %p %08lx %08lx %08lx\n", + // vm, args[0],args[1],args[2]); + + // interpret the code + vm->currentlyInterpreting = qtrue; + + // we might be called recursively, so this might not be the very top + programStack = vm->programStack; + stackOnEntry = programStack; + image = vm->dataBase; + + // set up the stack frame + programStack -= 48; + + *(int *)&image[ programStack + 44] = args[9]; + *(int *)&image[ programStack + 40] = args[8]; + *(int *)&image[ programStack + 36] = args[7]; + *(int *)&image[ programStack + 32] = args[6]; + *(int *)&image[ programStack + 28] = args[5]; + *(int *)&image[ programStack + 24] = args[4]; + *(int *)&image[ programStack + 20] = args[3]; + *(int *)&image[ programStack + 16] = args[2]; + *(int *)&image[ programStack + 12] = args[1]; + *(int *)&image[ programStack + 8 ] = args[0]; + *(int *)&image[ programStack + 4 ] = 0; // return stack + *(int *)&image[ programStack ] = -1; // will terminate the loop on return + + // Cheesy... manually save registers used by VM call... + // off we go into generated code... + // the PPC calling standard says the parms will all go into R3 - R11, so + // no special asm code is needed here +#ifdef __GNUC__ + ((void(*)(int, int, int, int, int, int, int, int))(vm->codeBase))( + programStack, (int)&stack, + (int)image, vm->dataMask, (int)&AsmCall, + (int)vm->instructionPointers, vm->instructionPointersLength, + (int)vm ); +#else + ((void(*)(int, int, int, int, int, int, int, int))(vm->codeBase))( + programStack, (int)&stack, + (int)image, vm->dataMask, *(int *)&AsmCall /* skip function pointer header */, + (int)vm->instructionPointers, vm->instructionPointersLength, + (int)vm ); +#endif + vm->programStack = stackOnEntry; + + vm->currentlyInterpreting = qfalse; + + return stack[1]; +} + + +/* +================== +AsmCall + +Put this at end of file because gcc messes up debug line numbers +================== +*/ +#ifdef __GNUC__ + +void AsmCall( void ) { +asm ( + // pop off the destination instruction +" lwz r12,0(r4) \n" // RG_TOP, 0(RG_OPSTACK) +" addi r4,r4,-4 \n" // RG_OPSTACK, RG_OPSTACK, -4 \n" + + // see if it is a system trap +" cmpwi r12,0 \n" // RG_TOP, 0 \n" +" bc 12,0, systemTrap \n" + + // calling another VM function, so lookup in instructionPointers +" slwi r12,r12,2 \n" // RG_TOP,RG_TOP,2 + // FIXME: range check +" lwzx r12, r8, r12 \n" // RG_TOP, RG_INSTRUCTIONS(RG_TOP) +" mtctr r12 \n" // RG_TOP +); + +#if defined(MACOS_X) && defined(__OPTIMIZE__) + // On Mac OS X, gcc doesn't push a frame when we are optimized, so trying to tear it down results in grave disorder. +//#warning Mac OS X optimization on, not popping GCC AsmCall frame +#else + // Mac OS X Server and unoptimized compiles include a GCC AsmCall frame + asm ( +" lwz r1,0(r1) \n" // pop off the GCC AsmCall frame +" lmw r30,-8(r1) \n" +); +#endif + +asm ( +" bcctr 20,0 \n" // when it hits a leave, it will branch to the current link register + + // calling a system trap +"systemTrap: \n" + // convert to positive system call number +" subfic r12,r12,-1 \n" + + // save all our registers, including the current link register +" mflr r13 \n" // RG_SECOND // copy off our link register +" addi r1,r1,-92 \n" // required 24 byets of linkage, 32 bytes of parameter, plus our saves +" stw r3,56(r1) \n" // RG_STACK, -36(REAL_STACK) +" stw r4,60(r1) \n" // RG_OPSTACK, 4(RG_REAL_STACK) +" stw r5,64(r1) \n" // RG_MEMBASE, 8(RG_REAL_STACK) +" stw r6,68(r1) \n" // RG_MEMMASK, 12(RG_REAL_STACK) +" stw r7,72(r1) \n" // RG_ASMCALL, 16(RG_REAL_STACK) +" stw r8,76(r1) \n" // RG_INSTRUCTIONS, 20(RG_REAL_STACK) +" stw r9,80(r1) \n" // RG_NUM_INSTRUCTIONS, 24(RG_REAL_STACK) +" stw r10,84(r1) \n" // RG_VM, 28(RG_REAL_STACK) +" stw r13,88(r1) \n" // RG_SECOND, 32(RG_REAL_STACK) // link register + + // save the vm stack position to allow recursive VM entry +" addi r13,r3,-4 \n" // RG_TOP, RG_STACK, -4 +" stw r13,0(r10) \n" //RG_TOP, VM_OFFSET_PROGRAM_STACK(RG_VM) + + // save the system call number as the 0th parameter +" add r3,r3,r5 \n" // r3, RG_STACK, RG_MEMBASE // r3 is the first parameter to vm->systemCalls +" stwu r12,4(r3) \n" // RG_TOP, 4(r3) + + // make the system call with the address of all the VM parms as a parameter + // vm->systemCalls( &parms ) +" lwz r12,4(r10) \n" // RG_TOP, VM_OFFSET_SYSTEM_CALL(RG_VM) +" mtctr r12 \n" // RG_TOP +" bcctrl 20,0 \n" +" mr r12,r3 \n" // RG_TOP, r3 + + // pop our saved registers +" lwz r3,56(r1) \n" // RG_STACK, 0(RG_REAL_STACK) +" lwz r4,60(r1) \n" // RG_OPSTACK, 4(RG_REAL_STACK) +" lwz r5,64(r1) \n" // RG_MEMBASE, 8(RG_REAL_STACK) +" lwz r6,68(r1) \n" // RG_MEMMASK, 12(RG_REAL_STACK) +" lwz r7,72(r1) \n" // RG_ASMCALL, 16(RG_REAL_STACK) +" lwz r8,76(r1) \n" // RG_INSTRUCTIONS, 20(RG_REAL_STACK) +" lwz r9,80(r1) \n" // RG_NUM_INSTRUCTIONS, 24(RG_REAL_STACK) +" lwz r10,84(r1) \n" // RG_VM, 28(RG_REAL_STACK) +" lwz r13,88(r1) \n" // RG_SECOND, 32(RG_REAL_STACK) +" addi r1,r1,92 \n" // RG_REAL_STACK, RG_REAL_STACK, 36 + + // restore the old link register +" mtlr r13 \n" // RG_SECOND + + // save off the return value +" stwu r12,4(r4) \n" // RG_TOP, 0(RG_OPSTACK) + + // GCC adds its own prolog / epliog code + ); +} +#else + +// codewarrior version + +void asm AsmCall( void ) { + + // pop off the destination instruction + + lwz r12,0(r4) // RG_TOP, 0(RG_OPSTACK) + + addi r4,r4,-4 // RG_OPSTACK, RG_OPSTACK, -4 + + + + // see if it is a system trap + + cmpwi r12,0 // RG_TOP, 0 + + bc 12,0, systemTrap + + + + // calling another VM function, so lookup in instructionPointers + + slwi r12,r12,2 // RG_TOP,RG_TOP,2 + + // FIXME: range check + + lwzx r12, r8, r12 // RG_TOP, RG_INSTRUCTIONS(RG_TOP) + + mtctr r12 // RG_TOP + + + + bcctr 20,0 // when it hits a leave, it will branch to the current link register + + + + // calling a system trap + +systemTrap: + + // convert to positive system call number + + subfic r12,r12,-1 + + + + // save all our registers, including the current link register + + mflr r13 // RG_SECOND // copy off our link register + + addi r1,r1,-92 // required 24 byets of linkage, 32 bytes of parameter, plus our saves + + stw r3,56(r1) // RG_STACK, -36(REAL_STACK) + + stw r4,60(r1) // RG_OPSTACK, 4(RG_REAL_STACK) + + stw r5,64(r1) // RG_MEMBASE, 8(RG_REAL_STACK) + + stw r6,68(r1) // RG_MEMMASK, 12(RG_REAL_STACK) + + stw r7,72(r1) // RG_ASMCALL, 16(RG_REAL_STACK) + + stw r8,76(r1) // RG_INSTRUCTIONS, 20(RG_REAL_STACK) + + stw r9,80(r1) // RG_NUM_INSTRUCTIONS, 24(RG_REAL_STACK) + + stw r10,84(r1) // RG_VM, 28(RG_REAL_STACK) + + stw r13,88(r1) // RG_SECOND, 32(RG_REAL_STACK) // link register + + + + // save the vm stack position to allow recursive VM entry + + addi r13,r3,-4 // RG_TOP, RG_STACK, -4 + + stw r13,0(r10) //RG_TOP, VM_OFFSET_PROGRAM_STACK(RG_VM) + + + + // save the system call number as the 0th parameter + + add r3,r3,r5 // r3, RG_STACK, RG_MEMBASE // r3 is the first parameter to vm->systemCalls + + stwu r12,4(r3) // RG_TOP, 4(r3) + + + + // make the system call with the address of all the VM parms as a parameter + + // vm->systemCalls( &parms ) + + lwz r12,4(r10) // RG_TOP, VM_OFFSET_SYSTEM_CALL(RG_VM) + + + + // perform macos cross fragment fixup crap + + lwz r9,0(r12) + + stw r2,52(r1) // save old TOC + + lwz r2,4(r12) + + + + mtctr r9 // RG_TOP + + bcctrl 20,0 + + + + lwz r2,52(r1) // restore TOC + + + + mr r12,r3 // RG_TOP, r3 + + + + // pop our saved registers + + lwz r3,56(r1) // RG_STACK, 0(RG_REAL_STACK) + + lwz r4,60(r1) // RG_OPSTACK, 4(RG_REAL_STACK) + + lwz r5,64(r1) // RG_MEMBASE, 8(RG_REAL_STACK) + + lwz r6,68(r1) // RG_MEMMASK, 12(RG_REAL_STACK) + + lwz r7,72(r1) // RG_ASMCALL, 16(RG_REAL_STACK) + + lwz r8,76(r1) // RG_INSTRUCTIONS, 20(RG_REAL_STACK) + + lwz r9,80(r1) // RG_NUM_INSTRUCTIONS, 24(RG_REAL_STACK) + + lwz r10,84(r1) // RG_VM, 28(RG_REAL_STACK) + + lwz r13,88(r1) // RG_SECOND, 32(RG_REAL_STACK) + + addi r1,r1,92 // RG_REAL_STACK, RG_REAL_STACK, 36 + + + + // restore the old link register + + mtlr r13 // RG_SECOND + + + + // save off the return value + + stwu r12,4(r4) // RG_TOP, 0(RG_OPSTACK) + + + + blr + +} + + + + +#endif |