translate.c

qemu性能直逼VMware的仿真器QEMU 的模擬速度約為實機的 25％；約為 Bochs 的 60 倍。Plex86、User-Mode-Linux、VMware 和 Virtual PC 則比

	    unsigned int xop = GET_FIELD(insn, 7, 9);
	    int32_t target;
	    switch (xop) {
#ifdef TARGET_SPARC64
	    case 0x1:		/* V9 BPcc */
		{
		    int cc;

		    target = GET_FIELD_SP(insn, 0, 18);
		    target = sign_extend(target, 18);
		    target <<= 2;
		    cc = GET_FIELD_SP(insn, 20, 21);
		    if (cc == 0)
			do_branch(dc, target, insn, 0);
		    else if (cc == 2)
			do_branch(dc, target, insn, 1);
		    else
			goto illegal_insn;
		    goto jmp_insn;
		}
	    case 0x3:		/* V9 BPr */
		{
		    target = GET_FIELD_SP(insn, 0, 13) | 
                        (GET_FIELD_SP(insn, 20, 21) << 14);
		    target = sign_extend(target, 16);
		    target <<= 2;
		    rs1 = GET_FIELD(insn, 13, 17);
		    gen_movl_reg_T0(rs1);
		    do_branch_reg(dc, target, insn);
		    goto jmp_insn;
		}
	    case 0x5:		/* V9 FBPcc */
		{
		    int cc = GET_FIELD_SP(insn, 20, 21);
                    if (gen_trap_ifnofpu(dc))
                        goto jmp_insn;
		    target = GET_FIELD_SP(insn, 0, 18);
		    target = sign_extend(target, 19);
		    target <<= 2;
		    do_fbranch(dc, target, insn, cc);
		    goto jmp_insn;
		}
#endif
	    case 0x2:		/* BN+x */
		{
		    target = GET_FIELD(insn, 10, 31);
		    target = sign_extend(target, 22);
		    target <<= 2;
		    do_branch(dc, target, insn, 0);
		    goto jmp_insn;
		}
	    case 0x6:		/* FBN+x */
		{
                    if (gen_trap_ifnofpu(dc))
                        goto jmp_insn;
		    target = GET_FIELD(insn, 10, 31);
		    target = sign_extend(target, 22);
		    target <<= 2;
		    do_fbranch(dc, target, insn, 0);
		    goto jmp_insn;
		}
	    case 0x4:		/* SETHI */
#define OPTIM
#if defined(OPTIM)
		if (rd) { // nop
#endif
		    uint32_t value = GET_FIELD(insn, 10, 31);
		    gen_movl_imm_T0(value << 10);
		    gen_movl_T0_reg(rd);
#if defined(OPTIM)
		}
#endif
		break;
	    case 0x0:		/* UNIMPL */
	    default:
                goto illegal_insn;
	    }
	    break;
	}
	break;
    case 1:
	/*CALL*/ {
	    target_long target = GET_FIELDs(insn, 2, 31) << 2;

#ifdef TARGET_SPARC64
	    if (dc->pc == (uint32_t)dc->pc) {
		gen_op_movl_T0_im(dc->pc);
	    } else {
		gen_op_movq_T0_im64(dc->pc >> 32, dc->pc);
	    }
#else
	    gen_op_movl_T0_im(dc->pc);
#endif
	    gen_movl_T0_reg(15);
	    target += dc->pc;
            gen_mov_pc_npc(dc);
	    dc->npc = target;
	}
	goto jmp_insn;
    case 2:			/* FPU & Logical Operations */
	{
	    unsigned int xop = GET_FIELD(insn, 7, 12);
	    if (xop == 0x3a) {	/* generate trap */
                int cond;

                rs1 = GET_FIELD(insn, 13, 17);
                gen_movl_reg_T0(rs1);
		if (IS_IMM) {
		    rs2 = GET_FIELD(insn, 25, 31);
#if defined(OPTIM)
		    if (rs2 != 0) {
#endif
			gen_movl_simm_T1(rs2);
			gen_op_add_T1_T0();
#if defined(OPTIM)
		    }
#endif
                } else {
                    rs2 = GET_FIELD(insn, 27, 31);
#if defined(OPTIM)
		    if (rs2 != 0) {
#endif
			gen_movl_reg_T1(rs2);
			gen_op_add_T1_T0();
#if defined(OPTIM)
		    }
#endif
                }
                cond = GET_FIELD(insn, 3, 6);
                if (cond == 0x8) {
                    save_state(dc);
                    gen_op_trap_T0();
                } else if (cond != 0) {
#ifdef TARGET_SPARC64
		    /* V9 icc/xcc */
		    int cc = GET_FIELD_SP(insn, 11, 12);
		    flush_T2(dc);
                    save_state(dc);
		    if (cc == 0)
			gen_cond[0][cond]();
		    else if (cc == 2)
			gen_cond[1][cond]();
		    else
			goto illegal_insn;
#else
		    flush_T2(dc);
                    save_state(dc);
		    gen_cond[0][cond]();
#endif
                    gen_op_trapcc_T0();
                }
                gen_op_next_insn();
                gen_op_movl_T0_0();
                gen_op_exit_tb();
                dc->is_br = 1;
                goto jmp_insn;
            } else if (xop == 0x28) {
                rs1 = GET_FIELD(insn, 13, 17);
                switch(rs1) {
                case 0: /* rdy */
		    gen_op_movtl_T0_env(offsetof(CPUSPARCState, y));
                    gen_movl_T0_reg(rd);
                    break;
                case 15: /* stbar / V9 membar */
		    break; /* no effect? */
#ifdef TARGET_SPARC64
		case 0x2: /* V9 rdccr */
                    gen_op_rdccr();
                    gen_movl_T0_reg(rd);
                    break;
		case 0x3: /* V9 rdasi */
		    gen_op_movl_T0_env(offsetof(CPUSPARCState, asi));
                    gen_movl_T0_reg(rd);
                    break;
		case 0x4: /* V9 rdtick */
                    gen_op_rdtick();
                    gen_movl_T0_reg(rd);
                    break;
		case 0x5: /* V9 rdpc */
		    if (dc->pc == (uint32_t)dc->pc) {
			gen_op_movl_T0_im(dc->pc);
		    } else {
			gen_op_movq_T0_im64(dc->pc >> 32, dc->pc);
		    }
		    gen_movl_T0_reg(rd);
		    break;
		case 0x6: /* V9 rdfprs */
		    gen_op_movl_T0_env(offsetof(CPUSPARCState, fprs));
                    gen_movl_T0_reg(rd);
                    break;
		case 0x13: /* Graphics Status */
                    if (gen_trap_ifnofpu(dc))
                        goto jmp_insn;
		    gen_op_movtl_T0_env(offsetof(CPUSPARCState, gsr));
                    gen_movl_T0_reg(rd);
                    break;
		case 0x17: /* Tick compare */
		    gen_op_movtl_T0_env(offsetof(CPUSPARCState, tick_cmpr));
                    gen_movl_T0_reg(rd);
                    break;
		case 0x18: /* System tick */
                    gen_op_rdtick(); // XXX
                    gen_movl_T0_reg(rd);
                    break;
		case 0x19: /* System tick compare */
		    gen_op_movtl_T0_env(offsetof(CPUSPARCState, stick_cmpr));
                    gen_movl_T0_reg(rd);
                    break;
		case 0x10: /* Performance Control */
		case 0x11: /* Performance Instrumentation Counter */
		case 0x12: /* Dispatch Control */
		case 0x14: /* Softint set, WO */
		case 0x15: /* Softint clear, WO */
		case 0x16: /* Softint write */
#endif
                default:
                    goto illegal_insn;
                }
#if !defined(CONFIG_USER_ONLY)
#ifndef TARGET_SPARC64
            } else if (xop == 0x29) { /* rdpsr / V9 unimp */
		if (!supervisor(dc))
		    goto priv_insn;
                gen_op_rdpsr();
                gen_movl_T0_reg(rd);
                break;
#endif
            } else if (xop == 0x2a) { /* rdwim / V9 rdpr */
		if (!supervisor(dc))
		    goto priv_insn;
#ifdef TARGET_SPARC64
                rs1 = GET_FIELD(insn, 13, 17);
		switch (rs1) {
		case 0: // tpc
		    gen_op_rdtpc();
		    break;
		case 1: // tnpc
		    gen_op_rdtnpc();
		    break;
		case 2: // tstate
		    gen_op_rdtstate();
		    break;
		case 3: // tt
		    gen_op_rdtt();
		    break;
		case 4: // tick
		    gen_op_rdtick();
		    break;
		case 5: // tba
		    gen_op_movtl_T0_env(offsetof(CPUSPARCState, tbr));
		    break;
		case 6: // pstate
		    gen_op_rdpstate();
		    break;
		case 7: // tl
		    gen_op_movl_T0_env(offsetof(CPUSPARCState, tl));
		    break;
		case 8: // pil
		    gen_op_movl_T0_env(offsetof(CPUSPARCState, psrpil));
		    break;
		case 9: // cwp
		    gen_op_rdcwp();
		    break;
		case 10: // cansave
		    gen_op_movl_T0_env(offsetof(CPUSPARCState, cansave));
		    break;
		case 11: // canrestore
		    gen_op_movl_T0_env(offsetof(CPUSPARCState, canrestore));
		    break;
		case 12: // cleanwin
		    gen_op_movl_T0_env(offsetof(CPUSPARCState, cleanwin));
		    break;
		case 13: // otherwin
		    gen_op_movl_T0_env(offsetof(CPUSPARCState, otherwin));
		    break;
		case 14: // wstate
		    gen_op_movl_T0_env(offsetof(CPUSPARCState, wstate));
		    break;
		case 31: // ver
		    gen_op_movtl_T0_env(offsetof(CPUSPARCState, version));
		    break;
		case 15: // fq
		default:
		    goto illegal_insn;
		}
#else
		gen_op_movl_T0_env(offsetof(CPUSPARCState, wim));
#endif
                gen_movl_T0_reg(rd);
                break;
            } else if (xop == 0x2b) { /* rdtbr / V9 flushw */
#ifdef TARGET_SPARC64
		gen_op_flushw();
#else
		if (!supervisor(dc))
		    goto priv_insn;
		gen_op_movtl_T0_env(offsetof(CPUSPARCState, tbr));
                gen_movl_T0_reg(rd);
#endif
                break;
#endif
	    } else if (xop == 0x34) {	/* FPU Operations */
                if (gen_trap_ifnofpu(dc))
                    goto jmp_insn;
                rs1 = GET_FIELD(insn, 13, 17);
	        rs2 = GET_FIELD(insn, 27, 31);
	        xop = GET_FIELD(insn, 18, 26);
		switch (xop) {
		    case 0x1: /* fmovs */
                	gen_op_load_fpr_FT0(rs2);
			gen_op_store_FT0_fpr(rd);
			break;
		    case 0x5: /* fnegs */
                	gen_op_load_fpr_FT1(rs2);
			gen_op_fnegs();
			gen_op_store_FT0_fpr(rd);
			break;
		    case 0x9: /* fabss */
                	gen_op_load_fpr_FT1(rs2);
			gen_op_fabss();
			gen_op_store_FT0_fpr(rd);
			break;
		    case 0x29: /* fsqrts */
                	gen_op_load_fpr_FT1(rs2);
			gen_op_fsqrts();
			gen_op_store_FT0_fpr(rd);
			break;
		    case 0x2a: /* fsqrtd */
                	gen_op_load_fpr_DT1(DFPREG(rs2));
			gen_op_fsqrtd();
			gen_op_store_DT0_fpr(DFPREG(rd));
			break;
		    case 0x2b: /* fsqrtq */
		        goto nfpu_insn;
		    case 0x41:
                	gen_op_load_fpr_FT0(rs1);
                	gen_op_load_fpr_FT1(rs2);
			gen_op_fadds();
			gen_op_store_FT0_fpr(rd);
			break;
		    case 0x42:
                	gen_op_load_fpr_DT0(DFPREG(rs1));
                	gen_op_load_fpr_DT1(DFPREG(rs2));
			gen_op_faddd();
			gen_op_store_DT0_fpr(DFPREG(rd));
			break;
		    case 0x43: /* faddq */
		        goto nfpu_insn;
		    case 0x45:
                	gen_op_load_fpr_FT0(rs1);
                	gen_op_load_fpr_FT1(rs2);
			gen_op_fsubs();
			gen_op_store_FT0_fpr(rd);
			break;
		    case 0x46:
                	gen_op_load_fpr_DT0(DFPREG(rs1));
                	gen_op_load_fpr_DT1(DFPREG(rs2));
			gen_op_fsubd();
			gen_op_store_DT0_fpr(DFPREG(rd));
			break;
		    case 0x47: /* fsubq */
		        goto nfpu_insn;
		    case 0x49:
                	gen_op_load_fpr_FT0(rs1);
                	gen_op_load_fpr_FT1(rs2);
			gen_op_fmuls();
			gen_op_store_FT0_fpr(rd);
			break;
		    case 0x4a:
                	gen_op_load_fpr_DT0(DFPREG(rs1));
                	gen_op_load_fpr_DT1(DFPREG(rs2));
			gen_op_fmuld();
			gen_op_store_DT0_fpr(rd);
			break;
		    case 0x4b: /* fmulq */
		        goto nfpu_insn;
		    case 0x4d:
                	gen_op_load_fpr_FT0(rs1);
                	gen_op_load_fpr_FT1(rs2);
			gen_op_fdivs();
			gen_op_store_FT0_fpr(rd);
			break;
		    case 0x4e:
                	gen_op_load_fpr_DT0(DFPREG(rs1));
			gen_op_load_fpr_DT1(DFPREG(rs2));
			gen_op_fdivd();
			gen_op_store_DT0_fpr(DFPREG(rd));
			break;
		    case 0x4f: /* fdivq */
		        goto nfpu_insn;
		    case 0x69:
                	gen_op_load_fpr_FT0(rs1);
                	gen_op_load_fpr_FT1(rs2);
			gen_op_fsmuld();
			gen_op_store_DT0_fpr(DFPREG(rd));
			break;
		    case 0x6e: /* fdmulq */
		        goto nfpu_insn;
		    case 0xc4:
                	gen_op_load_fpr_FT1(rs2);
			gen_op_fitos();
			gen_op_store_FT0_fpr(rd);
			break;
		    case 0xc6:
                	gen_op_load_fpr_DT1(DFPREG(rs2));
			gen_op_fdtos();
			gen_op_store_FT0_fpr(rd);
			break;
		    case 0xc7: /* fqtos */
		        goto nfpu_insn;
		    case 0xc8:
                	gen_op_load_fpr_FT1(rs2);
			gen_op_fitod();
			gen_op_store_DT0_fpr(DFPREG(rd));
			break;
		    case 0xc9:
                	gen_op_load_fpr_FT1(rs2);
			gen_op_fstod();
			gen_op_store_DT0_fpr(DFPREG(rd));
			break;
		    case 0xcb: /* fqtod */
		        goto nfpu_insn;
		    case 0xcc: /* fitoq */
		        goto nfpu_insn;
		    case 0xcd: /* fstoq */
		        goto nfpu_insn;
		    case 0xce: /* fdtoq */
		        goto nfpu_insn;
		    case 0xd1:
                	gen_op_load_fpr_FT1(rs2);
			gen_op_fstoi();
			gen_op_store_FT0_fpr(rd);
			break;
		    case 0xd2:
                	gen_op_load_fpr_DT1(rs2);
			gen_op_fdtoi();
			gen_op_store_FT0_fpr(rd);
			break;
		    case 0xd3: /* fqtoi */
		        goto nfpu_insn;
#ifdef TARGET_SPARC64
		    case 0x2: /* V9 fmovd */
                	gen_op_load_fpr_DT0(DFPREG(rs2));
			gen_op_store_DT0_fpr(DFPREG(rd));
			break;
		    case 0x6: /* V9 fnegd */
                	gen_op_load_fpr_DT1(DFPREG(rs2));
			gen_op_fnegd();
			gen_op_store_DT0_fpr(DFPREG(rd));
			break;
		    case 0xa: /* V9 fabsd */
                	gen_op_load_fpr_DT1(DFPREG(rs2));
			gen_op_fabsd();
			gen_op_store_DT0_fpr(DFPREG(rd));
			break;
		    case 0x81: /* V9 fstox */
                	gen_op_load_fpr_FT1(rs2);
			gen_op_fstox();
			gen_op_store_DT0_fpr(DFPREG(rd));
			break;
		    case 0x82: /* V9 fdtox */
                	gen_op_load_fpr_DT1(DFPREG(rs2));
			gen_op_fdtox();
			gen_op_store_DT0_fpr(DFPREG(rd));
			break;
		    case 0x84: /* V9 fxtos */
                	gen_op_load_fpr_DT1(DFPREG(rs2));
			gen_op_fxtos();
			gen_op_store_FT0_fpr(rd);
			break;
		    case 0x88: /* V9 fxtod */
                	gen_op_load_fpr_DT1(DFPREG(rs2));
			gen_op_fxtod();
			gen_op_store_DT0_fpr(DFPREG(rd));
			break;
		    case 0x3: /* V9 fmovq */
		    case 0x7: /* V9 fnegq */
		    case 0xb: /* V9 fabsq */
		    case 0x83: /* V9 fqtox */
		    case 0x8c: /* V9 fxtoq */
		        goto nfpu_insn;
#endif
		    default: