From 952c5c128f9efaea89d41d882c4ea3ade7df4591 Mon Sep 17 00:00:00 2001 From: zakk Date: Fri, 26 Aug 2005 04:48:05 +0000 Subject: Itsa me, quake3io! git-svn-id: svn://svn.icculus.org/quake3/trunk@2 edf5b092-35ff-0310-97b2-ce42778d08ea --- code/qcommon/vm_ppc.c | 1479 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 1479 insertions(+) create mode 100755 code/qcommon/vm_ppc.c (limited to 'code/qcommon/vm_ppc.c') diff --git a/code/qcommon/vm_ppc.c b/code/qcommon/vm_ppc.c new file mode 100755 index 0000000..bea8257 --- /dev/null +++ b/code/qcommon/vm_ppc.c @@ -0,0 +1,1479 @@ +/* +=========================================================================== +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 + + +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 + +// 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 = 0x7c000000, + 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 = 0x7c000000, + 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 + +// 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( int i ) { + buf[ compiledOfs ] = i; + compiledOfs++; +} + +static void Inst( int opcode, int destReg, int aReg, int bReg ) { + unsigned r; + + r = opcode | ( destReg << 21 ) | ( aReg << 16 ) | ( bReg << 11 ) ; + buf[ compiledOfs ] = r; + compiledOfs++; +} + +static void Inst4( int opcode, int destReg, int aReg, int bReg, int cReg ) { + unsigned r; + + r = opcode | ( destReg << 21 ) | ( aReg << 16 ) | ( bReg << 11 ) | ( cReg << 6 ); + buf[ compiledOfs ] = r; + compiledOfs++; +} + +static void InstImm( 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 ); + } + r = opcode | ( destReg << 21 ) | ( aReg << 16 ) | ( immediate & 0xffff ); + buf[ compiledOfs ] = r; + compiledOfs++; +} + +static void InstImmU( 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 ); + } + r = opcode | ( destReg << 21 ) | ( aReg << 16 ) | ( immediate & 0xffff ); + buf[ compiledOfs ] = r; + compiledOfs++; +} + +static qboolean rtopped; +static int pop0, pop1, oc0, oc1; +static vm_t *tvm; +static int instruction; +static byte *jused; +static int pass; + +static void ltop() { + if (rtopped == qfalse) { + InstImm( PPC_LWZ, R_TOP, R_OPSTACK, 0 ); // get value from opstack + } +} + +static void ltopandsecond() { + if (pass>=0 && buf[compiledOfs-1] == (PPC_STWU | R_TOP<<21 | R_OPSTACK<<16 | 4 ) && jused[instruction]==0 ) { + compiledOfs--; + if (!pass) { + tvm->instructionPointers[instruction] = compiledOfs * 4; + } + InstImm( PPC_LWZ, R_SECOND, R_OPSTACK, 0 ); // get value from opstack + InstImm( PPC_ADDI, R_OPSTACK, R_OPSTACK, -4 ); + } else if (pass>=0 && buf[compiledOfs-1] == (PPC_STW | R_TOP<<21 | R_OPSTACK<<16 | 0 ) && jused[instruction]==0 ) { + compiledOfs--; + if (!pass) { + tvm->instructionPointers[instruction] = compiledOfs * 4; + } + InstImm( PPC_LWZ, R_SECOND, R_OPSTACK, -4 ); // get value from opstack + InstImm( PPC_ADDI, R_OPSTACK, R_OPSTACK, -8 ); + } else { + ltop(); // get value from opstack + InstImm( PPC_LWZ, R_SECOND, R_OPSTACK, -4 ); // get value from opstack + InstImm( PPC_ADDI, R_OPSTACK, R_OPSTACK, -8 ); + } + rtopped = qfalse; +} + +// TJW: Unused +#if 0 +static void fltop() { + if (rtopped == qfalse) { + InstImm( PPC_LFS, R_TOP, R_OPSTACK, 0 ); // get value from opstack + } +} +#endif + +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; +} + +/* +================= +VM_Compile +================= +*/ +void VM_Compile( vm_t *vm, vmHeader_t *header ) { + int op; + int maxLength; + int v; + int i; + + // 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++ ) { + + rtopped = qfalse; + // translate all instructions + pc = 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: + InstImmU( PPC_ADDI, R_TOP, 0, 0 ); + InstImm( PPC_LWZ, R_TOP, R_TOP, 0 ); // *(int *)0 to crash to debugger + rtopped = qfalse; + break; + case OP_ENTER: + InstImm( PPC_ADDI, R_STACK, R_STACK, -Constant4() ); // sub R_STACK, R_STACK, imm + rtopped = qfalse; + break; + case OP_CONST: + v = Constant4(); + if (code[pc] == OP_LOAD4 || code[pc] == OP_LOAD2 || code[pc] == OP_LOAD1) { + v &= vm->dataMask; + } + if ( v < 32768 && v >= -32768 ) { + InstImmU( PPC_ADDI, R_TOP, 0, v & 0xffff ); + } else { + InstImmU( PPC_ADDIS, R_TOP, 0, (v >> 16)&0xffff ); + if ( v & 0xffff ) { + InstImmU( PPC_ORI, R_TOP, R_TOP, v & 0xffff ); + } + } + if (code[pc] == OP_LOAD4) { + Inst( PPC_LWZX, R_TOP, R_TOP, R_MEMBASE ); // load from memory base + pc++; + instruction++; + } else if (code[pc] == OP_LOAD2) { + Inst( PPC_LHZX, R_TOP, R_TOP, R_MEMBASE ); // load from memory base + pc++; + instruction++; + } else if (code[pc] == OP_LOAD1) { + Inst( PPC_LBZX, R_TOP, R_TOP, R_MEMBASE ); // load from memory base + pc++; + instruction++; + } + if (code[pc] == OP_STORE4) { + InstImm( PPC_LWZ, R_SECOND, R_OPSTACK, 0 ); // get value from opstack + InstImm( PPC_ADDI, R_OPSTACK, R_OPSTACK, -4 ); + //Inst( PPC_AND, R_MEMMASK, R_SECOND, R_SECOND ); // mask it + Inst( PPC_STWX, R_TOP, R_SECOND, R_MEMBASE ); // store from memory base + pc++; + instruction++; + rtopped = qfalse; + break; + } else if (code[pc] == OP_STORE2) { + InstImm( PPC_LWZ, R_SECOND, R_OPSTACK, 0 ); // get value from opstack + InstImm( PPC_ADDI, R_OPSTACK, R_OPSTACK, -4 ); + //Inst( PPC_AND, R_MEMMASK, R_SECOND, R_SECOND ); // mask it + Inst( PPC_STHX, R_TOP, R_SECOND, R_MEMBASE ); // store from memory base + pc++; + instruction++; + rtopped = qfalse; + break; + } else if (code[pc] == OP_STORE1) { + InstImm( PPC_LWZ, R_SECOND, R_OPSTACK, 0 ); // get value from opstack + InstImm( PPC_ADDI, R_OPSTACK, R_OPSTACK, -4 ); + //Inst( PPC_AND, R_MEMMASK, R_SECOND, R_SECOND ); // mask it + Inst( PPC_STBX, R_TOP, R_SECOND, R_MEMBASE ); // store from memory base + pc++; + instruction++; + rtopped = qfalse; + break; + } + if (code[pc] == OP_JUMP) { + jused[v] = 1; + } + InstImm( PPC_STWU, R_TOP, R_OPSTACK, 4 ); + rtopped = qtrue; + break; + case OP_LOCAL: + oc0 = oc1; + oc1 = Constant4(); + if (code[pc] == OP_LOAD4 || code[pc] == OP_LOAD2 || code[pc] == OP_LOAD1) { + oc1 &= vm->dataMask; + } + InstImm( PPC_ADDI, R_TOP, R_STACK, oc1 ); + if (code[pc] == OP_LOAD4) { + Inst( PPC_LWZX, R_TOP, R_TOP, R_MEMBASE ); // load from memory base + pc++; + instruction++; + } else if (code[pc] == OP_LOAD2) { + Inst( PPC_LHZX, R_TOP, R_TOP, R_MEMBASE ); // load from memory base + pc++; + instruction++; + } else if (code[pc] == OP_LOAD1) { + Inst( PPC_LBZX, R_TOP, R_TOP, R_MEMBASE ); // load from memory base + pc++; + instruction++; + } + if (code[pc] == OP_STORE4) { + InstImm( PPC_LWZ, R_SECOND, R_OPSTACK, 0 ); // get value from opstack + InstImm( PPC_ADDI, R_OPSTACK, R_OPSTACK, -4 ); + //Inst( PPC_AND, R_MEMMASK, R_SECOND, R_SECOND ); // mask it + Inst( PPC_STWX, R_TOP, R_SECOND, R_MEMBASE ); // store from memory base + pc++; + instruction++; + rtopped = qfalse; + break; + } else if (code[pc] == OP_STORE2) { + InstImm( PPC_LWZ, R_SECOND, R_OPSTACK, 0 ); // get value from opstack + InstImm( PPC_ADDI, R_OPSTACK, R_OPSTACK, -4 ); + //Inst( PPC_AND, R_MEMMASK, R_SECOND, R_SECOND ); // mask it + Inst( PPC_STHX, R_TOP, R_SECOND, R_MEMBASE ); // store from memory base + pc++; + instruction++; + rtopped = qfalse; + break; + } else if (code[pc] == OP_STORE1) { + InstImm( PPC_LWZ, R_SECOND, R_OPSTACK, 0 ); // get value from opstack + InstImm( PPC_ADDI, R_OPSTACK, R_OPSTACK, -4 ); + //Inst( PPC_AND, R_MEMMASK, R_SECOND, R_SECOND ); // mask it + Inst( PPC_STBX, R_TOP, R_SECOND, R_MEMBASE ); // store from memory base + pc++; + instruction++; + rtopped = qfalse; + break; + } + InstImm( PPC_STWU, R_TOP, R_OPSTACK, 4 ); + rtopped = qtrue; + break; + case OP_ARG: + ltop(); // get value from opstack + InstImm( PPC_ADDI, R_OPSTACK, R_OPSTACK, -4 ); + InstImm( PPC_ADDI, R_EA, R_STACK, Constant1() ); // location to put it + Inst( PPC_STWX, R_TOP, R_EA, R_MEMBASE ); + rtopped = qfalse; + break; + case OP_CALL: + Inst( PPC_MFSPR, R_SECOND, 8, 0 ); // move from link register + InstImm( PPC_STWU, R_SECOND, R_REAL_STACK, -16 ); // save off the old return address + + Inst( PPC_MTSPR, R_ASMCALL, 9, 0 ); // move to count register + Inst( PPC_BCCTR | 1, 20, 0, 0 ); // jump and link to the count register + + InstImm( PPC_LWZ, R_SECOND, R_REAL_STACK, 0 ); // fetch the old return address + InstImm( PPC_ADDI, R_REAL_STACK, R_REAL_STACK, 16 ); + Inst( PPC_MTSPR, R_SECOND, 8, 0 ); // move to link register + rtopped = qfalse; + break; + case OP_PUSH: + InstImm( PPC_ADDI, R_OPSTACK, R_OPSTACK, 4 ); + rtopped = qfalse; + break; + case OP_POP: + InstImm( PPC_ADDI, R_OPSTACK, R_OPSTACK, -4 ); + rtopped = qfalse; + break; + case OP_LEAVE: + InstImm( PPC_ADDI, R_STACK, R_STACK, Constant4() ); // add R_STACK, R_STACK, imm + Inst( PPC_BCLR, 20, 0, 0 ); // branch unconditionally to link register + rtopped = qfalse; + break; + case OP_LOAD4: + ltop(); // get value from opstack + //Inst( PPC_AND, R_MEMMASK, R_TOP, R_TOP ); // mask it + Inst( PPC_LWZX, R_TOP, R_TOP, R_MEMBASE ); // load from memory base + InstImm( PPC_STW, R_TOP, R_OPSTACK, 0 ); + rtopped = qtrue; + break; + case OP_LOAD2: + ltop(); // get value from opstack + //Inst( PPC_AND, R_MEMMASK, R_TOP, R_TOP ); // mask it + Inst( PPC_LHZX, R_TOP, R_TOP, R_MEMBASE ); // load from memory base + InstImm( PPC_STW, R_TOP, R_OPSTACK, 0 ); + rtopped = qtrue; + break; + case OP_LOAD1: + ltop(); // get value from opstack + //Inst( PPC_AND, R_MEMMASK, R_TOP, R_TOP ); // mask it + Inst( PPC_LBZX, R_TOP, R_TOP, R_MEMBASE ); // load from memory base + InstImm( PPC_STW, R_TOP, R_OPSTACK, 0 ); + rtopped = qtrue; + break; + case OP_STORE4: + ltopandsecond(); // get value from opstack + //Inst( PPC_AND, R_MEMMASK, R_SECOND, R_SECOND ); // mask it + Inst( PPC_STWX, R_TOP, R_SECOND, R_MEMBASE ); // store from memory base + rtopped = qfalse; + break; + case OP_STORE2: + ltopandsecond(); // get value from opstack + //Inst( PPC_AND, R_MEMMASK, R_SECOND, R_SECOND ); // mask it + Inst( PPC_STHX, R_TOP, R_SECOND, R_MEMBASE ); // store from memory base + rtopped = qfalse; + break; + case OP_STORE1: + ltopandsecond(); // get value from opstack + //Inst( PPC_AND, R_MEMMASK, R_SECOND, R_SECOND ); // mask it + Inst( PPC_STBX, R_TOP, R_SECOND, R_MEMBASE ); // store from memory base + rtopped = qfalse; + break; + + case OP_EQ: + ltopandsecond(); // get value from opstack + Inst( PPC_CMP, 0, R_SECOND, R_TOP ); + i = Constant4(); + jused[i] = 1; + InstImm( PPC_BC, 4, 2, 8 ); + if ( pass==1 ) { + v = vm->instructionPointers[ i ] - (int)&buf[compiledOfs]; + } else { + v = 0; + } + Emit4(PPC_B | (v&0x3ffffff) ); + rtopped = qfalse; + break; + case OP_NE: + ltopandsecond(); // get value from opstack + Inst( PPC_CMP, 0, R_SECOND, R_TOP ); + i = Constant4(); + jused[i] = 1; + InstImm( PPC_BC, 12, 2, 8 ); + if ( pass==1 ) { + v = vm->instructionPointers[ i ] - (int)&buf[compiledOfs]; + } else { + v = 0; + } + Emit4(PPC_B | (unsigned int)(v&0x3ffffff) ); +// InstImm( PPC_BC, 4, 2, v ); + + rtopped = qfalse; + break; + case OP_LTI: + ltopandsecond(); // get value from opstack + Inst( PPC_CMP, 0, R_SECOND, R_TOP ); + i = Constant4(); + jused[i] = 1; + InstImm( PPC_BC, 4, 0, 8 ); + if ( pass==1 ) { + v = vm->instructionPointers[ i ] - (int)&buf[compiledOfs]; + } else { + v = 0; + } + Emit4(PPC_B | (unsigned int)(v&0x3ffffff) ); +// InstImm( PPC_BC, 12, 0, v ); + rtopped = qfalse; + break; + case OP_LEI: + ltopandsecond(); // get value from opstack + Inst( PPC_CMP, 0, R_SECOND, R_TOP ); + i = Constant4(); + jused[i] = 1; + InstImm( PPC_BC, 12, 1, 8 ); + if ( pass==1 ) { + v = vm->instructionPointers[ i ] - (int)&buf[compiledOfs]; + } else { + v = 0; + } + Emit4(PPC_B | (unsigned int)(v&0x3ffffff) ); +// InstImm( PPC_BC, 4, 1, v ); + rtopped = qfalse; + break; + case OP_GTI: + ltopandsecond(); // get value from opstack + Inst( PPC_CMP, 0, R_SECOND, R_TOP ); + i = Constant4(); + jused[i] = 1; + InstImm( PPC_BC, 4, 1, 8 ); + if ( pass==1 ) { + v = vm->instructionPointers[ i ] - (int)&buf[compiledOfs]; + } else { + v = 0; + } + Emit4(PPC_B | (unsigned int)(v&0x3ffffff) ); +// InstImm( PPC_BC, 12, 1, v ); + rtopped = qfalse; + break; + case OP_GEI: + ltopandsecond(); // get value from opstack + Inst( PPC_CMP, 0, R_SECOND, R_TOP ); + i = Constant4(); + jused[i] = 1; + InstImm( PPC_BC, 12, 0, 8 ); + if ( pass==1 ) { + v = vm->instructionPointers[ i ] - (int)&buf[compiledOfs]; + } else { + v = 0; + } + Emit4(PPC_B | (unsigned int)(v&0x3ffffff) ); +// InstImm( PPC_BC, 4, 0, v ); + rtopped = qfalse; + break; + case OP_LTU: + ltopandsecond(); // get value from opstack + Inst( PPC_CMPL, 0, R_SECOND, R_TOP ); + i = Constant4(); + jused[i] = 1; + InstImm( PPC_BC, 4, 0, 8 ); + if ( pass==1 ) { + v = vm->instructionPointers[ i ] - (int)&buf[compiledOfs]; + } else { + v = 0; + } + Emit4(PPC_B | (unsigned int)(v&0x3ffffff) ); +// InstImm( PPC_BC, 12, 0, v ); + rtopped = qfalse; + break; + case OP_LEU: + ltopandsecond(); // get value from opstack + Inst( PPC_CMPL, 0, R_SECOND, R_TOP ); + i = Constant4(); + jused[i] = 1; + InstImm( PPC_BC, 12, 1, 8 ); + if ( pass==1 ) { + v = vm->instructionPointers[ i ] - (int)&buf[compiledOfs]; + } else { + v = 0; + } + Emit4(PPC_B | (unsigned int)(v&0x3ffffff) ); +// InstImm( PPC_BC, 4, 1, v ); + rtopped = qfalse; + break; + case OP_GTU: + ltopandsecond(); // get value from opstack + Inst( PPC_CMPL, 0, R_SECOND, R_TOP ); + i = Constant4(); + jused[i] = 1; + InstImm( PPC_BC, 4, 1, 8 ); + if ( pass==1 ) { + v = vm->instructionPointers[ i ] - (int)&buf[compiledOfs]; + } else { + v = 0; + } + Emit4(PPC_B | (unsigned int)(v&0x3ffffff) ); +// InstImm( PPC_BC, 12, 1, v ); + rtopped = qfalse; + break; + case OP_GEU: + ltopandsecond(); // get value from opstack + Inst( PPC_CMPL, 0, R_SECOND, R_TOP ); + i = Constant4(); + jused[i] = 1; + InstImm( PPC_BC, 12, 0, 8 ); + if ( pass==1 ) { + v = vm->instructionPointers[ i ] - (int)&buf[compiledOfs]; + } else { + v = 0; + } + Emit4(PPC_B | (unsigned int)(v&0x3ffffff) ); +// InstImm( PPC_BC, 4, 0, v ); + rtopped = qfalse; + break; + + case OP_EQF: + fltopandsecond(); // get value from opstack + Inst( PPC_FCMPU, 0, R_TOP, R_SECOND ); + i = Constant4(); + jused[i] = 1; + InstImm( PPC_BC, 4, 2, 8 ); + if ( pass==1 ) { + v = vm->instructionPointers[ i ] - (int)&buf[compiledOfs]; + } else { + v = 0; + } + Emit4(PPC_B | (unsigned int)(v&0x3ffffff) ); +// InstImm( PPC_BC, 12, 2, v ); + rtopped = qfalse; + break; + case OP_NEF: + fltopandsecond(); // get value from opstack + Inst( PPC_FCMPU, 0, R_TOP, R_SECOND ); + i = Constant4(); + jused[i] = 1; + InstImm( PPC_BC, 12, 2, 8 ); + if ( pass==1 ) { + v = vm->instructionPointers[ i ] - (int)&buf[compiledOfs]; + } else { + v = 0; + } + Emit4(PPC_B | (unsigned int)(v&0x3ffffff) ); +// InstImm( PPC_BC, 4, 2, v ); + rtopped = qfalse; + break; + case OP_LTF: + fltopandsecond(); // get value from opstack + Inst( PPC_FCMPU, 0, R_SECOND, R_TOP ); + i = Constant4(); + jused[i] = 1; + InstImm( PPC_BC, 4, 0, 8 ); + if ( pass==1 ) { + v = vm->instructionPointers[ i ] - (int)&buf[compiledOfs]; + } else { + v = 0; + } + Emit4(PPC_B | (unsigned int)(v&0x3ffffff) ); +// InstImm( PPC_BC, 12, 0, v ); + rtopped = qfalse; + break; + case OP_LEF: + fltopandsecond(); // get value from opstack + Inst( PPC_FCMPU, 0, R_SECOND, R_TOP ); + i = Constant4(); + jused[i] = 1; + InstImm( PPC_BC, 12, 1, 8 ); + if ( pass==1 ) { + v = vm->instructionPointers[ i ] - (int)&buf[compiledOfs]; + } else { + v = 0; + } + Emit4(PPC_B | (unsigned int)(v&0x3ffffff) ); +// InstImm( PPC_BC, 4, 1, v ); + rtopped = qfalse; + break; + case OP_GTF: + fltopandsecond(); // get value from opstack + Inst( PPC_FCMPU, 0, R_SECOND, R_TOP ); + i = Constant4(); + jused[i] = 1; + InstImm( PPC_BC, 4, 1, 8 ); + if ( pass==1 ) { + v = vm->instructionPointers[ i ] - (int)&buf[compiledOfs]; + } else { + v = 0; + } + Emit4(PPC_B | (unsigned int)(v&0x3ffffff) ); +// InstImm( PPC_BC, 12, 1, v ); + rtopped = qfalse; + break; + case OP_GEF: + fltopandsecond(); // get value from opstack + Inst( PPC_FCMPU, 0, R_SECOND, R_TOP ); + i = Constant4(); + jused[i] = 1; + InstImm( PPC_BC, 12, 0, 8 ); + if ( pass==1 ) { + v = vm->instructionPointers[ i ] - (int)&buf[compiledOfs]; + } else { + v = 0; + } + Emit4(PPC_B | (unsigned int)(v&0x3ffffff) ); +// InstImm( PPC_BC, 4, 0, v ); + rtopped = qfalse; + break; + + case OP_NEGI: + ltop(); // get value from opstack + InstImm( PPC_SUBFIC, R_TOP, R_TOP, 0 ); + InstImm( PPC_STW, R_TOP, R_OPSTACK, 0 ); // save value to opstack + rtopped = qtrue; + break; + case OP_ADD: + ltop(); // get value from opstack + InstImm( PPC_LWZU, R_SECOND, R_OPSTACK, -4 ); // get value from opstack + Inst( PPC_ADD, R_TOP, R_TOP, R_SECOND ); + InstImm( PPC_STW, R_TOP, R_OPSTACK, 0 ); // save value to opstack + rtopped = qtrue; + break; + case OP_SUB: + ltop(); // get value from opstack + InstImm( PPC_LWZU, R_SECOND, R_OPSTACK, -4 ); // get value from opstack + Inst( PPC_SUBF, R_TOP, R_TOP, R_SECOND ); + InstImm( PPC_STW, R_TOP, R_OPSTACK, 0 ); // save value to opstack + rtopped = qtrue; + break; + case OP_DIVI: + ltop(); // get value from opstack + InstImm( PPC_LWZU, R_SECOND, R_OPSTACK, -4 ); // get value from opstack + Inst( PPC_DIVW, R_TOP, R_SECOND, R_TOP ); + InstImm( PPC_STW, R_TOP, R_OPSTACK, 0 ); // save value to opstack + rtopped = qtrue; + break; + case OP_DIVU: + ltop(); // get value from opstack + InstImm( PPC_LWZU, R_SECOND, R_OPSTACK, -4 ); // get value from opstack + Inst( PPC_DIVWU, R_TOP, R_SECOND, R_TOP ); + InstImm( PPC_STW, R_TOP, R_OPSTACK, 0 ); // save value to opstack + rtopped = qtrue; + break; + case OP_MODI: + ltop(); // get value from opstack + InstImm( PPC_LWZU, R_SECOND, R_OPSTACK, -4 ); // get value from opstack + Inst( PPC_DIVW, R_EA, R_SECOND, R_TOP ); + Inst( PPC_MULLW, R_EA, R_TOP, R_EA ); + Inst( PPC_SUBF, R_TOP, R_EA, R_SECOND ); + InstImm( PPC_STW, R_TOP, R_OPSTACK, 0 ); // save value to opstack + rtopped = qtrue; + break; + case OP_MODU: + ltop(); // get value from opstack + InstImm( PPC_LWZU, R_SECOND, R_OPSTACK, -4 ); // get value from opstack + Inst( PPC_DIVWU, R_EA, R_SECOND, R_TOP ); + Inst( PPC_MULLW, R_EA, R_TOP, R_EA ); + Inst( PPC_SUBF, R_TOP, R_EA, R_SECOND ); + InstImm( PPC_STW, R_TOP, R_OPSTACK, 0 ); // save value to opstack + rtopped = qtrue; + break; + case OP_MULI: + case OP_MULU: + ltop(); // get value from opstack + InstImm( PPC_LWZU, R_SECOND, R_OPSTACK, -4 ); // get value from opstack + Inst( PPC_MULLW, R_TOP, R_SECOND, R_TOP ); + InstImm( PPC_STW, R_TOP, R_OPSTACK, 0 ); // save value to opstack + rtopped = qtrue; + break; + case OP_BAND: + ltop(); // get value from opstack + InstImm( PPC_LWZU, R_SECOND, R_OPSTACK, -4 ); // get value from opstack + Inst( PPC_AND, R_SECOND, R_TOP, R_TOP ); + InstImm( PPC_STW, R_TOP, R_OPSTACK, 0 ); // save value to opstack + rtopped = qtrue; + break; + case OP_BOR: + ltop(); // get value from opstack + InstImm( PPC_LWZU, R_SECOND, R_OPSTACK, -4 ); // get value from opstack + Inst( PPC_OR, R_SECOND, R_TOP, R_TOP ); + InstImm( PPC_STW, R_TOP, R_OPSTACK, 0 ); // save value to opstack + rtopped = qtrue; + break; + case OP_BXOR: + ltop(); // get value from opstack + InstImm( PPC_LWZU, R_SECOND, R_OPSTACK, -4 ); // get value from opstack + Inst( PPC_XOR, R_SECOND, R_TOP, R_TOP ); + InstImm( PPC_STW, R_TOP, R_OPSTACK, 0 ); // save value to opstack + rtopped = qtrue; + break; + case OP_BCOM: + ltop(); // get value from opstack + Inst( PPC_NOR, R_TOP, R_TOP, R_TOP ); + InstImm( PPC_STW, R_TOP, R_OPSTACK, 0 ); // save value to opstack + rtopped = qtrue; + break; + case OP_LSH: + ltop(); // get value from opstack + InstImm( PPC_LWZU, R_SECOND, R_OPSTACK, -4 ); // get value from opstack + Inst( PPC_SLW, R_SECOND, R_TOP, R_TOP ); + InstImm( PPC_STW, R_TOP, R_OPSTACK, 0 ); // save value to opstack + rtopped = qtrue; + break; + case OP_RSHI: + ltop(); // get value from opstack + InstImm( PPC_LWZU, R_SECOND, R_OPSTACK, -4 ); // get value from opstack + Inst( PPC_SRAW, R_SECOND, R_TOP, R_TOP ); + InstImm( PPC_STW, R_TOP, R_OPSTACK, 0 ); // save value to opstack + rtopped = qtrue; + break; + case OP_RSHU: + ltop(); // get value from opstack + InstImm( PPC_LWZU, R_SECOND, R_OPSTACK, -4 ); // get value from opstack + Inst( PPC_SRW, R_SECOND, R_TOP, R_TOP ); + InstImm( PPC_STW, R_TOP, R_OPSTACK, 0 ); // save value to opstack + rtopped = qtrue; + break; + + case OP_NEGF: + InstImm( PPC_LFS, R_TOP, R_OPSTACK, 0 ); // get value from opstack + Inst( PPC_FNEG, R_TOP, 0, R_TOP ); + InstImm( PPC_STFS, R_TOP, R_OPSTACK, 0 ); // save value to opstack + rtopped = qfalse; + break; + case OP_ADDF: + InstImm( PPC_LFS, R_TOP, R_OPSTACK, 0 ); // get value from opstack + InstImm( PPC_LFSU, R_SECOND, R_OPSTACK, -4 ); // get value from opstack + Inst( PPC_FADDS, R_TOP, R_SECOND, R_TOP ); + InstImm( PPC_STFS, R_TOP, R_OPSTACK, 0 ); // save value to opstack + rtopped = qfalse; + break; + case OP_SUBF: + InstImm( PPC_LFS, R_TOP, R_OPSTACK, 0 ); // get value from opstack + InstImm( PPC_LFSU, R_SECOND, R_OPSTACK, -4 ); // get value from opstack + Inst( PPC_FSUBS, R_TOP, R_SECOND, R_TOP ); + InstImm( PPC_STFS, R_TOP, R_OPSTACK, 0 ); // save value to opstack + rtopped = qfalse; + break; + case OP_DIVF: + InstImm( PPC_LFS, R_TOP, R_OPSTACK, 0 ); // get value from opstack + InstImm( PPC_LFSU, R_SECOND, R_OPSTACK, -4 ); // get value from opstack + Inst( PPC_FDIVS, R_TOP, R_SECOND, R_TOP ); + InstImm( PPC_STFS, R_TOP, R_OPSTACK, 0 ); // save value to opstack + rtopped = qfalse; + break; + case OP_MULF: + InstImm( PPC_LFS, R_TOP, R_OPSTACK, 0 ); // get value from opstack + InstImm( PPC_LFSU, R_SECOND, R_OPSTACK, -4 ); // get value from opstack + Inst4( PPC_FMULS, R_TOP, R_SECOND, 0, R_TOP ); + InstImm( PPC_STFS, R_TOP, R_OPSTACK, 0 ); // save value to opstack + rtopped = qfalse; + break; + + case OP_CVIF: + v = (int)&itofConvert; + InstImmU( PPC_ADDIS, R_EA, 0, (v >> 16)&0xffff ); + InstImmU( PPC_ORI, R_EA, R_EA, v & 0xffff ); + InstImm( PPC_LWZ, R_TOP, R_OPSTACK, 0 ); // get value from opstack + InstImmU( PPC_XORIS, R_TOP, R_TOP, 0x8000 ); + InstImm( PPC_STW, R_TOP, R_EA, 12 ); + InstImm( PPC_LFD, R_TOP, R_EA, 0 ); + InstImm( PPC_LFD, R_SECOND, R_EA, 8 ); + Inst( PPC_FSUB, R_TOP, R_SECOND, R_TOP ); + // Inst( PPC_FRSP, R_TOP, 0, R_TOP ); + InstImm( PPC_STFS, R_TOP, R_OPSTACK, 0 ); // save value to opstack + rtopped = qfalse; + break; + case OP_CVFI: + InstImm( PPC_LFS, R_TOP, R_OPSTACK, 0 ); // get value from opstack + Inst( PPC_FCTIWZ, R_TOP, 0, R_TOP ); + Inst( PPC_STFIWX, R_TOP, 0, R_OPSTACK ); // save value to opstack + rtopped = qfalse; + break; + case OP_SEX8: + ltop(); // get value from opstack + Inst( PPC_EXTSB, R_TOP, R_TOP, 0 ); + InstImm( PPC_STW, R_TOP, R_OPSTACK, 0 ); + rtopped = qtrue; + break; + case OP_SEX16: + ltop(); // get value from opstack + Inst( PPC_EXTSH, R_TOP, R_TOP, 0 ); + InstImm( PPC_STW, R_TOP, R_OPSTACK, 0 ); + rtopped = qtrue; + break; + + case OP_BLOCK_COPY: + v = Constant4() >> 2; + ltop(); // source + InstImm( PPC_LWZ, R_SECOND, R_OPSTACK, -4 ); // dest + InstImm( PPC_ADDI, R_OPSTACK, R_OPSTACK, -8 ); + InstImmU( PPC_ADDI, R_EA, 0, v ); // count + // FIXME: range check + Inst( PPC_MTSPR, R_EA, 9, 0 ); // move to count register + + Inst( PPC_ADD, R_TOP, R_TOP, R_MEMBASE ); + InstImm( PPC_ADDI, R_TOP, R_TOP, -4 ); + Inst( PPC_ADD, R_SECOND, R_SECOND, R_MEMBASE ); + InstImm( PPC_ADDI, R_SECOND, R_SECOND, -4 ); + + InstImm( PPC_LWZU, R_EA, R_TOP, 4 ); // source + InstImm( PPC_STWU, R_EA, R_SECOND, 4 ); // dest + Inst( PPC_BC | 0xfff8 , 16, 0, 0 ); // loop + rtopped = qfalse; + break; + + case OP_JUMP: + ltop(); // get value from opstack + InstImm( PPC_ADDI, R_OPSTACK, R_OPSTACK, -4 ); + Inst( PPC_RLWINM | ( 29 << 1 ), R_TOP, R_TOP, 2 ); + // FIXME: range check + Inst( PPC_LWZX, R_TOP, R_TOP, R_INSTRUCTIONS ); + Inst( PPC_MTSPR, R_TOP, 9, 0 ); // move to count register + Inst( PPC_BCCTR, 20, 0, 0 ); // jump to the count register + rtopped = qfalse; + break; + default: + Com_Error( ERR_DROP, "VM_CompilePPC: bad opcode %i at instruction %i, offset %i", op, instruction, pc ); + } + pop0 = pop1; + pop1 = 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 ); + 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; + } + + // go back over it in place now to fixup reletive jump targets + buf = (unsigned *)vm->codeBase; + } + } + 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; + + // 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 + + // 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 / epilog 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 -- cgit v1.2.3