1274 lines
44 KiB
C++
1274 lines
44 KiB
C++
// vm_ppc.c
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// ppc dynamic compiler
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#include "vm_local.h"
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#pragma opt_pointer_analysis off
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typedef enum {
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R_REAL_STACK = 1,
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// registers 3-11 are the parameter passing registers
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// state
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R_STACK = 3, // local
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R_OPSTACK, // global
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// constants
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R_MEMBASE, // global
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R_MEMMASK,
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R_ASMCALL, // global
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R_INSTRUCTIONS, // global
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R_NUM_INSTRUCTIONS, // global
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R_CVM, // currentVM
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// temps
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R_TOP = 12,
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R_SECOND = 13,
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R_EA = 14 // effective address calculation
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} regNums_t;
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#define RG_REAL_STACK r1
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#define RG_STACK r3
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#define RG_OPSTACK r4
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#define RG_MEMBASE r5
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#define RG_MEMMASK r6
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#define RG_ASMCALL r7
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#define RG_INSTRUCTIONS r8
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#define RG_NUM_INSTRUCTIONS r9
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#define RG_CVM r10
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#define RG_TOP r12
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#define RG_SECOND r13
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#define RG_EA r14
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// this doesn't have the low order bits set for instructions i'm not using...
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typedef enum {
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PPC_TDI = 0x08000000,
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PPC_TWI = 0x0c000000,
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PPC_MULLI = 0x1c000000,
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PPC_SUBFIC = 0x20000000,
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PPC_CMPI = 0x28000000,
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PPC_CMPLI = 0x2c000000,
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PPC_ADDIC = 0x30000000,
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PPC_ADDIC_ = 0x34000000,
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PPC_ADDI = 0x38000000,
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PPC_ADDIS = 0x3c000000,
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PPC_BC = 0x40000000,
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PPC_SC = 0x44000000,
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PPC_B = 0x48000000,
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PPC_MCRF = 0x4c000000,
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PPC_BCLR = 0x4c000020,
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PPC_RFID = 0x4c000000,
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PPC_CRNOR = 0x4c000000,
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PPC_RFI = 0x4c000000,
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PPC_CRANDC = 0x4c000000,
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PPC_ISYNC = 0x4c000000,
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PPC_CRXOR = 0x4c000000,
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PPC_CRNAND = 0x4c000000,
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PPC_CREQV = 0x4c000000,
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PPC_CRORC = 0x4c000000,
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PPC_CROR = 0x4c000000,
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//------------
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PPC_BCCTR = 0x4c000420,
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PPC_RLWIMI = 0x50000000,
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PPC_RLWINM = 0x54000000,
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PPC_RLWNM = 0x5c000000,
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PPC_ORI = 0x60000000,
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PPC_ORIS = 0x64000000,
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PPC_XORI = 0x68000000,
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PPC_XORIS = 0x6c000000,
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PPC_ANDI_ = 0x70000000,
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PPC_ANDIS_ = 0x74000000,
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PPC_RLDICL = 0x78000000,
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PPC_RLDICR = 0x78000000,
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PPC_RLDIC = 0x78000000,
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PPC_RLDIMI = 0x78000000,
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PPC_RLDCL = 0x78000000,
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PPC_RLDCR = 0x78000000,
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PPC_CMP = 0x7c000000,
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PPC_TW = 0x7c000000,
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PPC_SUBFC = 0x7c000010,
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PPC_MULHDU = 0x7c000000,
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PPC_ADDC = 0x7c000014,
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PPC_MULHWU = 0x7c000000,
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PPC_MFCR = 0x7c000000,
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PPC_LWAR = 0x7c000000,
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PPC_LDX = 0x7c000000,
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PPC_LWZX = 0x7c00002e,
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PPC_SLW = 0x7c000030,
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PPC_CNTLZW = 0x7c000000,
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PPC_SLD = 0x7c000000,
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PPC_AND = 0x7c000038,
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PPC_CMPL = 0x7c000040,
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PPC_SUBF = 0x7c000050,
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PPC_LDUX = 0x7c000000,
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//------------
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PPC_DCBST = 0x7c000000,
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PPC_LWZUX = 0x7c00006c,
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PPC_CNTLZD = 0x7c000000,
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PPC_ANDC = 0x7c000000,
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PPC_TD = 0x7c000000,
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PPC_MULHD = 0x7c000000,
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PPC_MULHW = 0x7c000000,
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PPC_MTSRD = 0x7c000000,
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PPC_MFMSR = 0x7c000000,
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PPC_LDARX = 0x7c000000,
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PPC_DCBF = 0x7c000000,
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PPC_LBZX = 0x7c0000ae,
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PPC_NEG = 0x7c000000,
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PPC_MTSRDIN = 0x7c000000,
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PPC_LBZUX = 0x7c000000,
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PPC_NOR = 0x7c0000f8,
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PPC_SUBFE = 0x7c000000,
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PPC_ADDE = 0x7c000000,
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PPC_MTCRF = 0x7c000000,
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PPC_MTMSR = 0x7c000000,
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PPC_STDX = 0x7c000000,
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PPC_STWCX_ = 0x7c000000,
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PPC_STWX = 0x7c00012e,
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PPC_MTMSRD = 0x7c000000,
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PPC_STDUX = 0x7c000000,
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PPC_STWUX = 0x7c00016e,
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PPC_SUBFZE = 0x7c000000,
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PPC_ADDZE = 0x7c000000,
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PPC_MTSR = 0x7c000000,
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PPC_STDCX_ = 0x7c000000,
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PPC_STBX = 0x7c0001ae,
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PPC_SUBFME = 0x7c000000,
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PPC_MULLD = 0x7c000000,
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//------------
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PPC_ADDME = 0x7c000000,
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PPC_MULLW = 0x7c0001d6,
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PPC_MTSRIN = 0x7c000000,
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PPC_DCBTST = 0x7c000000,
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PPC_STBUX = 0x7c000000,
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PPC_ADD = 0x7c000214,
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PPC_DCBT = 0x7c000000,
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PPC_LHZX = 0x7c00022e,
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PPC_EQV = 0x7c000000,
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PPC_TLBIE = 0x7c000000,
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PPC_ECIWX = 0x7c000000,
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PPC_LHZUX = 0x7c000000,
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PPC_XOR = 0x7c000278,
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PPC_MFSPR = 0x7c0002a6,
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PPC_LWAX = 0x7c000000,
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PPC_LHAX = 0x7c000000,
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PPC_TLBIA = 0x7c000000,
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PPC_MFTB = 0x7c000000,
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PPC_LWAUX = 0x7c000000,
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PPC_LHAUX = 0x7c000000,
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PPC_STHX = 0x7c00032e,
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PPC_ORC = 0x7c000338,
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PPC_SRADI = 0x7c000000,
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PPC_SLBIE = 0x7c000000,
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PPC_ECOWX = 0x7c000000,
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PPC_STHUX = 0x7c000000,
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PPC_OR = 0x7c000378,
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PPC_DIVDU = 0x7c000000,
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PPC_DIVWU = 0x7c000396,
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PPC_MTSPR = 0x7c0003a6,
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PPC_DCBI = 0x7c000000,
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PPC_NAND = 0x7c000000,
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PPC_DIVD = 0x7c000000,
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//------------
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PPC_DIVW = 0x7c0003d6,
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PPC_SLBIA = 0x7c000000,
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PPC_MCRXR = 0x7c000000,
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PPC_LSWX = 0x7c000000,
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PPC_LWBRX = 0x7c000000,
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PPC_LFSX = 0x7c000000,
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PPC_SRW = 0x7c000430,
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PPC_SRD = 0x7c000000,
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PPC_TLBSYNC = 0x7c000000,
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PPC_LFSUX = 0x7c000000,
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PPC_MFSR = 0x7c000000,
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PPC_LSWI = 0x7c000000,
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PPC_SYNC = 0x7c000000,
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PPC_LFDX = 0x7c000000,
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PPC_LFDUX = 0x7c000000,
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PPC_MFSRIN = 0x7c000000,
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PPC_STSWX = 0x7c000000,
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PPC_STWBRX = 0x7c000000,
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PPC_STFSX = 0x7c000000,
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PPC_STFSUX = 0x7c000000,
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PPC_STSWI = 0x7c000000,
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PPC_STFDX = 0x7c000000,
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PPC_DCBA = 0x7c000000,
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PPC_STFDUX = 0x7c000000,
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PPC_LHBRX = 0x7c000000,
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PPC_SRAW = 0x7c000630,
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PPC_SRAD = 0x7c000000,
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PPC_SRAWI = 0x7c000000,
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PPC_EIEIO = 0x7c000000,
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PPC_STHBRX = 0x7c000000,
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PPC_EXTSH = 0x7c000734,
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PPC_EXTSB = 0x7c000774,
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PPC_ICBI = 0x7c000000,
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//------------
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PPC_STFIWX = 0x7c0007ae,
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PPC_EXTSW = 0x7c000000,
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PPC_DCBZ = 0x7c000000,
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PPC_LWZ = 0x80000000,
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PPC_LWZU = 0x84000000,
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PPC_LBZ = 0x88000000,
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PPC_LBZU = 0x8c000000,
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PPC_STW = 0x90000000,
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PPC_STWU = 0x94000000,
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PPC_STB = 0x98000000,
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PPC_STBU = 0x9c000000,
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PPC_LHZ = 0xa0000000,
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PPC_LHZU = 0xa4000000,
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PPC_LHA = 0xa8000000,
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PPC_LHAU = 0xac000000,
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PPC_STH = 0xb0000000,
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PPC_STHU = 0xb4000000,
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PPC_LMW = 0xb8000000,
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PPC_STMW = 0xbc000000,
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PPC_LFS = 0xc0000000,
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PPC_LFSU = 0xc4000000,
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PPC_LFD = 0xc8000000,
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PPC_LFDU = 0xcc000000,
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PPC_STFS = 0xd0000000,
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PPC_STFSU = 0xd4000000,
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PPC_STFD = 0xd8000000,
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PPC_STFDU = 0xdc000000,
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PPC_LD = 0xe8000000,
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PPC_LDU = 0xe8000001,
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PPC_LWA = 0xe8000002,
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PPC_FDIVS = 0xec000024,
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PPC_FSUBS = 0xec000028,
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PPC_FADDS = 0xec00002a,
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//------------
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PPC_FSQRTS = 0xec000000,
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PPC_FRES = 0xec000000,
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PPC_FMULS = 0xec000032,
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PPC_FMSUBS = 0xec000000,
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PPC_FMADDS = 0xec000000,
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PPC_FNMSUBS = 0xec000000,
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PPC_FNMADDS = 0xec000000,
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PPC_STD = 0xf8000000,
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PPC_STDU = 0xf8000001,
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PPC_FCMPU = 0xfc000000,
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PPC_FRSP = 0xfc000018,
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PPC_FCTIW = 0xfc000000,
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PPC_FCTIWZ = 0xfc00001e,
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PPC_FDIV = 0xfc000000,
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PPC_FSUB = 0xfc000028,
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PPC_FADD = 0xfc000000,
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PPC_FSQRT = 0xfc000000,
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PPC_FSEL = 0xfc000000,
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PPC_FMUL = 0xfc000000,
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PPC_FRSQRTE = 0xfc000000,
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PPC_FMSUB = 0xfc000000,
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PPC_FMADD = 0xfc000000,
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PPC_FNMSUB = 0xfc000000,
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PPC_FNMADD = 0xfc000000,
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PPC_FCMPO = 0xfc000000,
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PPC_MTFSB1 = 0xfc000000,
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PPC_FNEG = 0xfc000050,
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PPC_MCRFS = 0xfc000000,
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PPC_MTFSB0 = 0xfc000000,
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PPC_FMR = 0xfc000000,
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PPC_MTFSFI = 0xfc000000,
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PPC_FNABS = 0xfc000000,
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PPC_FABS = 0xfc000000,
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//------------
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PPC_MFFS = 0xfc000000,
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PPC_MTFSF = 0xfc000000,
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PPC_FCTID = 0xfc000000,
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PPC_FCTIDZ = 0xfc000000,
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PPC_FCFID = 0xfc000000
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} ppcOpcodes_t;
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// the newly generated code
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static unsigned *buf;
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static int compiledOfs; // in dwords
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// fromt the original bytecode
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static byte *code;
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static int pc;
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void AsmCall( void );
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double itofConvert[2];
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static int Constant4( void ) {
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int v;
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v = code[pc] | (code[pc+1]<<8) | (code[pc+2]<<16) | (code[pc+3]<<24);
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pc += 4;
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return v;
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}
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static int Constant1( void ) {
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int v;
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v = code[pc];
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pc += 1;
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return v;
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}
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static void Emit4( int i ) {
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buf[ compiledOfs ] = i;
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compiledOfs++;
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}
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static void Inst( int opcode, int destReg, int aReg, int bReg ) {
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unsigned r;
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r = opcode | ( destReg << 21 ) | ( aReg << 16 ) | ( bReg << 11 ) ;
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buf[ compiledOfs ] = r;
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compiledOfs++;
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}
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static void Inst4( int opcode, int destReg, int aReg, int bReg, int cReg ) {
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unsigned r;
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r = opcode | ( destReg << 21 ) | ( aReg << 16 ) | ( bReg << 11 ) | ( cReg << 6 );
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buf[ compiledOfs ] = r;
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compiledOfs++;
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}
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static void InstImm( int opcode, int destReg, int aReg, int immediate ) {
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unsigned r;
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if ( immediate > 32767 || immediate < -32768 ) {
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Com_Error( ERR_FATAL, "VM_Compile: immediate value %i out of range, opcode %x,%d,%d", immediate, opcode, destReg, aReg );
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}
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r = opcode | ( destReg << 21 ) | ( aReg << 16 ) | ( immediate & 0xffff );
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buf[ compiledOfs ] = r;
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compiledOfs++;
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}
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static void InstImmU( int opcode, int destReg, int aReg, int immediate ) {
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unsigned r;
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if ( immediate > 0xffff || immediate < 0 ) {
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Com_Error( ERR_FATAL, "VM_Compile: immediate value %i out of range", immediate );
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}
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r = opcode | ( destReg << 21 ) | ( aReg << 16 ) | ( immediate & 0xffff );
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buf[ compiledOfs ] = r;
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compiledOfs++;
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}
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static qboolean rtopped;
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static int pop0, pop1, oc0, oc1;
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static vm_t *tvm;
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static int instruction;
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static byte *jused;
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static int pass;
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static void ltop() {
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if (rtopped == qfalse) {
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InstImm( PPC_LWZ, R_TOP, R_OPSTACK, 0 ); // get value from opstack
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}
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}
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static void ltopandsecond() {
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if (pass>=0 && buf[compiledOfs-1] == (PPC_STWU | R_TOP<<21 | R_OPSTACK<<16 | 4 ) && jused[instruction]==0 ) {
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compiledOfs--;
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if (!pass) {
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tvm->instructionPointers[instruction] = compiledOfs * 4;
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}
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InstImm( PPC_LWZ, R_SECOND, R_OPSTACK, 0 ); // get value from opstack
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InstImm( PPC_ADDI, R_OPSTACK, R_OPSTACK, -4 );
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} else if (pass>=0 && buf[compiledOfs-1] == (PPC_STW | R_TOP<<21 | R_OPSTACK<<16 | 0 ) && jused[instruction]==0 ) {
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compiledOfs--;
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if (!pass) {
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tvm->instructionPointers[instruction] = compiledOfs * 4;
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}
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InstImm( PPC_LWZ, R_SECOND, R_OPSTACK, -4 ); // get value from opstack
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InstImm( PPC_ADDI, R_OPSTACK, R_OPSTACK, -8 );
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} else {
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ltop(); // get value from opstack
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InstImm( PPC_LWZ, R_SECOND, R_OPSTACK, -4 ); // get value from opstack
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InstImm( PPC_ADDI, R_OPSTACK, R_OPSTACK, -8 );
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}
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rtopped = qfalse;
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}
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// TJW: Unused
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#if 0
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static void fltop() {
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if (rtopped == qfalse) {
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InstImm( PPC_LFS, R_TOP, R_OPSTACK, 0 ); // get value from opstack
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}
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}
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#endif
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static void fltopandsecond() {
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InstImm( PPC_LFS, R_TOP, R_OPSTACK, 0 ); // get value from opstack
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InstImm( PPC_LFS, R_SECOND, R_OPSTACK, -4 ); // get value from opstack
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InstImm( PPC_ADDI, R_OPSTACK, R_OPSTACK, -8 );
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rtopped = qfalse;
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return;
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}
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/*
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=================
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VM_Compile
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=================
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*/
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void VM_Compile( vm_t *vm, vmHeader_t *header ) {
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int op;
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int maxLength;
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int v;
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int i;
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// set up the into-to-float variables
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((int *)itofConvert)[0] = 0x43300000;
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((int *)itofConvert)[1] = 0x80000000;
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((int *)itofConvert)[2] = 0x43300000;
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// allocate a very large temp buffer, we will shrink it later
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maxLength = header->codeLength * 8;
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buf = Z_Malloc( maxLength,qfalse );
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jused = Z_Malloc(header->instructionCount + 2,qfalse);
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Com_Memset(jused, 0, header->instructionCount+2);
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// compile everything twice, so the second pass will have valid instruction
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// pointers for branches
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for ( pass = -1 ; pass < 2 ; pass++ ) {
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rtopped = qfalse;
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// translate all instructions
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pc = 0;
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pop0 = 343545;
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pop1 = 2443545;
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oc0 = -2343535;
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oc1 = 24353454;
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tvm = vm;
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code = (byte *)header + header->codeOffset;
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compiledOfs = 0;
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#ifndef __GNUC__
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// metrowerks seems to require this header in front of functions
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Emit4( (int)(buf+2) );
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Emit4( 0 );
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#endif
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for ( instruction = 0 ; instruction < header->instructionCount ; instruction++ ) {
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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;
|
|
if ( pass==1 ) {
|
|
v = vm->instructionPointers[ i ] - (int)&buf[compiledOfs];
|
|
} else {
|
|
v = 0;
|
|
}
|
|
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;
|
|
if ( pass==1 ) {
|
|
v = vm->instructionPointers[ i ] - (int)&buf[compiledOfs];
|
|
} else {
|
|
v = 0;
|
|
}
|
|
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;
|
|
if ( pass==1 ) {
|
|
v = vm->instructionPointers[ i ] - (int)&buf[compiledOfs];
|
|
} else {
|
|
v = 0;
|
|
}
|
|
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;
|
|
if ( pass==1 ) {
|
|
v = vm->instructionPointers[ i ] - (int)&buf[compiledOfs];
|
|
} else {
|
|
v = 0;
|
|
}
|
|
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;
|
|
if ( pass==1 ) {
|
|
v = vm->instructionPointers[ i ] - (int)&buf[compiledOfs];
|
|
} else {
|
|
v = 0;
|
|
}
|
|
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;
|
|
if ( pass==1 ) {
|
|
v = vm->instructionPointers[ i ] - (int)&buf[compiledOfs];
|
|
} else {
|
|
v = 0;
|
|
}
|
|
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;
|
|
if ( pass==1 ) {
|
|
v = vm->instructionPointers[ i ] - (int)&buf[compiledOfs];
|
|
} else {
|
|
v = 0;
|
|
}
|
|
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;
|
|
if ( pass==1 ) {
|
|
v = vm->instructionPointers[ i ] - (int)&buf[compiledOfs];
|
|
} else {
|
|
v = 0;
|
|
}
|
|
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;
|
|
if ( pass==1 ) {
|
|
v = vm->instructionPointers[ i ] - (int)&buf[compiledOfs];
|
|
} else {
|
|
v = 0;
|
|
}
|
|
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;
|
|
if ( pass==1 ) {
|
|
v = vm->instructionPointers[ i ] - (int)&buf[compiledOfs];
|
|
} else {
|
|
v = 0;
|
|
}
|
|
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;
|
|
if ( pass==1 ) {
|
|
v = vm->instructionPointers[ i ] - (int)&buf[compiledOfs];
|
|
} else {
|
|
v = 0;
|
|
}
|
|
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) // 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
|
|
");
|
|
|
|
|
|
#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) // pop off the GCC AsmCall frame
|
|
lmw r30,-8(r1)
|
|
");
|
|
#endif
|
|
|
|
asm ("
|
|
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)
|
|
mtctr r12 // RG_TOP
|
|
bcctrl 20,0
|
|
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)
|
|
|
|
// GCC adds its own prolog / epliog code
|
|
" );
|
|
}
|
|
|
|
#endif
|