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/* 
 * $Id: ppc32.h,v 1.10 2001/09/19 21:59:15 marcus Exp $ 
 */ 
 
#define PIKE_OPCODE_T unsigned INT32 
 
#define PPC_INSTR_B_FORM(OPCD,BO,BI,BD,AA,LK)                 \ 
      add_to_program(((OPCD)<<26)|((BO)<<21)|((BI)<<16)|        \ 
                     (((BD)&0x3fff)<<2)|((AA)<<1)|(LK)) 
#define PPC_INSTR_D_FORM(OPCD,S,A,d)                                  \ 
      add_to_program(((OPCD)<<26)|((S)<<21)|((A)<<16)|((d)&0xffff)) 
#define PPC_INSTR_M_FORM(OPCD,S,A,SH,MB,ME,Rc)                                \ 
      add_to_program(((OPCD)<<26)|((S)<<21)|((A)<<16)|((SH)<<11)|       \ 
                     ((MB)<<6)|((ME)<<1)|(Rc)) 
 
#define BC(BO,BI,BD) PPC_INSTR_B_FORM(16,BO,BI,BD,0,0) 
 
#define CMPLI(crfD,A,UIMM) PPC_INSTR_D_FORM(10,crfD,A,UIMM) 
#define ADDIC(D,A,SIMM) PPC_INSTR_D_FORM(12,D,A,SIMM) 
#define ADDI(D,A,SIMM) PPC_INSTR_D_FORM(14,D,A,SIMM) 
#define ADDIS(D,A,SIMM) PPC_INSTR_D_FORM(15,D,A,SIMM) 
#define ORI(A,S,UIMM) PPC_INSTR_D_FORM(24,S,A,UIMM) 
#define LWZ(D,A,d) PPC_INSTR_D_FORM(32,D,A,d) 
#define STW(S,A,d) PPC_INSTR_D_FORM(36,S,A,d) 
#define LHA(D,A,d) PPC_INSTR_D_FORM(42,D,A,d) 
 
#define RLWINM(S,A,SH,MB,ME) PPC_INSTR_M_FORM(21,S,A,SH,MB,ME,0) 
 
 
#define LOW_GET_JUMP()        (PROG_COUNTER[0]) 
#define LOW_SKIPJUMP()        (SET_PROG_COUNTER(PROG_COUNTER + 1)) 
#define PROG_COUNTER (((INT32 **)__builtin_frame_address(1))[2]) 
 
#define SET_REG(REG, X) do {                                            \ 
    INT32 val_ = X;                                                       \ 
    INT32 reg_ = REG;                                                     \ 
    if ((-32768 <= val_) && (val_ <= 32767)) {                            \ 
      /* addi reg,0,val */                                                \ 
      ADDI(reg_, 0, val_);                                                \ 
    } else {                                                              \ 
      /* addis reg,0,%hi(val) */                                          \ 
      ADDIS(reg_, 0, val_ >> 16);                                         \ 
      if (val_ & 0xffff) {                                                \ 
        /* ori reg,reg,%lo(val) */                                        \ 
        ORI(reg_, reg_, val_);                                            \ 
      }                                                                   \ 
    }                                                                     \ 
  } while(0) 
 
#define PPC_REG_RET 0 
 
#define PPC_REG_ARG1 3 
#define PPC_REG_ARG2 4 
#define PPC_REG_ARG3 5 
 
#define PPC_REG_PIKE_MARK_SP 8 
#define PPC_REG_PIKE_FP 9 
#define PPC_REG_PIKE_SP 10 
 
#define PPC_REG_PIKE_INTERP 31 
 
extern int ppc32_codegen_state; 
void ppc32_flush_code_generator_state(void); 
#define FLUSH_CODE_GENERATOR_STATE ppc32_flush_code_generator_state 
 
#define PPC_CODEGEN_FP_ISSET 1 
#define PPC_CODEGEN_SP_ISSET 2 
#define PPC_CODEGEN_SP_NEEDSSTORE 4 
#define PPC_CODEGEN_MARK_SP_ISSET 8 
#define PPC_CODEGEN_MARK_SP_NEEDSSTORE 16 
 
#define LOAD_FP_REG() do {                            \ 
    if(!(ppc32_codegen_state & PPC_CODEGEN_FP_ISSET)) { \ 
      /* lwz pike_fp,frame_pointer(pike_interpreter) */ \ 
      LWZ(PPC_REG_PIKE_FP, PPC_REG_PIKE_INTERP,         \ 
          OFFSETOF(Pike_interpreter, frame_pointer));   \ 
      ppc32_codegen_state |= PPC_CODEGEN_FP_ISSET;      \ 
    }                                                   \ 
  } while(0) 
 
#define LOAD_SP_REG() do {                            \ 
    if(!(ppc32_codegen_state & PPC_CODEGEN_SP_ISSET)) { \ 
      /* lwz pike_sp,stack_pointer(pike_interpreter) */ \ 
      LWZ(PPC_REG_PIKE_SP, PPC_REG_PIKE_INTERP,         \ 
          OFFSETOF(Pike_interpreter, stack_pointer));   \ 
      ppc32_codegen_state |= PPC_CODEGEN_SP_ISSET;      \ 
    }                                                   \ 
  } while(0) 
 
#define LOAD_MARK_SP_REG() do {                                               \ 
    if(!(ppc32_codegen_state & PPC_CODEGEN_MARK_SP_ISSET)) {            \ 
      /* lwz pike_mark_sp,mark_stack_pointer(pike_interpreter) */       \ 
      LWZ(PPC_REG_PIKE_MARK_SP, PPC_REG_PIKE_INTERP,                    \ 
          OFFSETOF(Pike_interpreter, mark_stack_pointer));              \ 
      ppc32_codegen_state |= PPC_CODEGEN_MARK_SP_ISSET;                 \ 
    }                                                                   \ 
  } while(0) 
 
#define INCR_SP_REG(n) do {                           \ 
      /* addi pike_sp,pike_sp,n */                      \ 
      ADDI(PPC_REG_PIKE_SP, PPC_REG_PIKE_SP, n);        \ 
      ppc32_codegen_state |= PPC_CODEGEN_SP_NEEDSSTORE; \ 
    } while(0) 
 
#define INCR_MARK_SP_REG(n) do {                              \ 
      /* addi pike_mark_sp,pike_mark_sp,n */                    \ 
      ADDI(PPC_REG_PIKE_MARK_SP, PPC_REG_PIKE_MARK_SP, n);      \ 
      ppc32_codegen_state |= PPC_CODEGEN_MARK_SP_NEEDSSTORE;    \ 
    } while(0) 
 
#define UPDATE_PC() do {                              \ 
    INT32 tmp = PIKE_PC;                                \ 
    LOAD_FP_REG();                                      \ 
    SET_REG(0, tmp);                                    \ 
    /* stw r0,pc(pike_fp) */                            \ 
    STW(0, PPC_REG_PIKE_FP, OFFSETOF(pike_frame, pc));  \ 
  } while(0) 
 
#define ins_pointer(PTR)  add_to_program((INT32)(PTR)) 
#define read_pointer(OFF) (Pike_compiler->new_program->program[(INT32)(OFF)]) 
#define upd_pointer(OFF,PTR) (Pike_compiler->new_program->program[(INT32)(OFF)] = (INT32)(PTR)) 
#define ins_align(ALIGN) 
#define ins_byte(VAL)   add_to_program((INT32)(VAL)) 
#define ins_data(VAL)   add_to_program((INT32)(VAL)) 
 
INT32 ppc32_ins_f_jump(unsigned int b); 
void ppc32_update_f_jump(INT32 offset, INT32 to_offset); 
INT32 ppc32_read_f_jump(INT32 offset); 
#define INS_F_JUMP ppc32_ins_f_jump 
#define UPDATE_F_JUMP ppc32_update_f_jump 
#define READ_F_JUMP ppc32_read_f_jump 
 
#define READ_INCR_BYTE(PC)    (((PC)++)[0]) 
 
#if 0 
#define RELOCATE_program(P, NEW)      do {                    \ 
    PIKE_OPCODE_T *op_ = NEW;                                   \ 
    struct program *p_ = P;                                     \ 
    size_t rel_ = p_->num_relocations;                          \ 
    INT32 delta_ = p_->program - op_;                           \ 
    while (rel_--) {                                            \ 
      DO_IF_DEBUG(                                              \ 
        if ((op_[p_->relocations[rel_]] & 0xfc000002) !=        \ 
            0x48000000) {                                       \ 
          fatal("Bad relocation: %d, off:%d, opcode: 0x%08x\n", \ 
                rel_, p_->relocations[rel_],                    \ 
                op_[p_->relocations[rel_]]);                    \ 
        }                                                       \ 
      );                                                        \ 
      op_[p_->relocations[rel_]] = 0x48000000 |                 \ 
        ((op_[p_->relocations[rel_]] + (delta_<<2)) &           \ 
         0x03ffffff);                                           \ 
    }                                                           \ 
  } while(0) 
#endif 
 
extern void ppc32_flush_instruction_cache(void *addr, size_t len); 
#define FLUSH_INSTRUCTION_CACHE ppc32_flush_instruction_cache 
 
/* 
struct dynamic_buffer_s; 
 
void ppc32_encode_program(struct program *p, struct dynamic_buffer_s *buf); 
void ppc32_decode_program(struct program *p); 
 
#define ENCODE_PROGRAM(P, BUF)  ppc32_encode_program(P, BUF) 
#define DECODE_PROGRAM(P)       ppc32_decode_program(p) 
*/ 
 
#ifdef PIKE_CPU_REG_PREFIX 
#define PPC_REGNAME(n) PIKE_CPU_REG_PREFIX #n 
#else 
#define PPC_REGNAME(n) #n 
#endif 
 
#define CALL_MACHINE_CODE(pc)                                             \ 
  __asm__ __volatile__( "       mtctr %0\n"                                 \ 
                        "       mr "PPC_REGNAME(31)",%1\n"                  \ 
                        "       bctr"                                       \ 
                        :                                                   \ 
                        : "r" (pc), "r" (&Pike_interpreter)                 \ 
                        : "ctr", "lr", "cc", "memory", "r31", "r0",         \ 
                          "r3", "r4", "r5", "r6", "r7", "r8", "r9",         \ 
                          "r10", "r11", "r12")