TCG code generator

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3943 c046a42c-6fe2-441c-8c8c-71466251a162

2 files changed, 1217 insertions, 0 deletions

diff --git a/tcg/i386/tcg-target.c b/tcg/i386/tcg-target.c
new file mode 100644
index 0000000000..20822a4bc1
--- /dev/null
+++ b/tcg/i386/tcg-target.c
@@ -0,0 +1,1163 @@
+/*
+ * Tiny Code Generator for QEMU
+ *
+ * Copyright (c) 2008 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+const char *tcg_target_reg_names[TCG_TARGET_NB_REGS] = {
+    "%eax",
+    "%ecx",
+    "%edx",
+    "%ebx",
+    "%esp",
+    "%ebp",
+    "%esi",
+    "%edi",
+};
+
+int tcg_target_reg_alloc_order[TCG_TARGET_NB_REGS] = {
+    TCG_REG_EAX,
+    TCG_REG_EDX,
+    TCG_REG_ECX,
+    TCG_REG_EBX,
+    TCG_REG_ESI,
+    TCG_REG_EDI,
+    TCG_REG_EBP,
+    TCG_REG_ESP,
+};
+
+const int tcg_target_call_iarg_regs[3] = { TCG_REG_EAX, TCG_REG_EDX, TCG_REG_ECX };
+const int tcg_target_call_oarg_regs[2] = { TCG_REG_EAX, TCG_REG_EDX };
+
+static void patch_reloc(uint8_t *code_ptr, int type, 
+                        tcg_target_long value)
+{
+    switch(type) {
+    case R_386_32:
+        *(uint32_t *)code_ptr = value;
+        break;
+    case R_386_PC32:
+        *(uint32_t *)code_ptr = value - (long)code_ptr;
+        break;
+    default:
+        tcg_abort();
+    }
+}
+
+/* maximum number of register used for input function arguments */
+static inline int tcg_target_get_call_iarg_regs_count(int flags)
+{
+    flags &= TCG_CALL_TYPE_MASK;
+    switch(flags) {
+    case TCG_CALL_TYPE_STD:
+        return 0;
+    case TCG_CALL_TYPE_REGPARM_1:
+    case TCG_CALL_TYPE_REGPARM_2:
+    case TCG_CALL_TYPE_REGPARM:
+        return flags - TCG_CALL_TYPE_REGPARM_1 + 1;
+    default:
+        tcg_abort();
+    }
+}
+
+/* parse target specific constraints */
+int target_parse_constraint(TCGArgConstraint *ct, const char **pct_str)
+{
+    const char *ct_str;
+
+    ct_str = *pct_str;
+    switch(ct_str[0]) {
+    case 'a':
+        ct->ct |= TCG_CT_REG;
+        tcg_regset_set_reg(ct->u.regs, TCG_REG_EAX);
+        break;
+    case 'b':
+        ct->ct |= TCG_CT_REG;
+        tcg_regset_set_reg(ct->u.regs, TCG_REG_EBX);
+        break;
+    case 'c':
+        ct->ct |= TCG_CT_REG;
+        tcg_regset_set_reg(ct->u.regs, TCG_REG_ECX);
+        break;
+    case 'd':
+        ct->ct |= TCG_CT_REG;
+        tcg_regset_set_reg(ct->u.regs, TCG_REG_EDX);
+        break;
+    case 'S':
+        ct->ct |= TCG_CT_REG;
+        tcg_regset_set_reg(ct->u.regs, TCG_REG_ESI);
+        break;
+    case 'D':
+        ct->ct |= TCG_CT_REG;
+        tcg_regset_set_reg(ct->u.regs, TCG_REG_EDI);
+        break;
+    case 'q':
+        ct->ct |= TCG_CT_REG;
+        tcg_regset_set32(ct->u.regs, 0, 0xf);
+        break;
+    case 'r':
+        ct->ct |= TCG_CT_REG;
+        tcg_regset_set32(ct->u.regs, 0, 0xff);
+        break;
+
+        /* qemu_ld/st address constraint */
+    case 'L':
+        ct->ct |= TCG_CT_REG;
+        tcg_regset_set32(ct->u.regs, 0, 0xff);
+        tcg_regset_reset_reg(ct->u.regs, TCG_REG_EAX);
+        tcg_regset_reset_reg(ct->u.regs, TCG_REG_EDX);
+        break;
+    default:
+        return -1;
+    }
+    ct_str++;
+    *pct_str = ct_str;
+    return 0;
+}
+
+/* test if a constant matches the constraint */
+static inline int tcg_target_const_match(tcg_target_long val,
+                                         const TCGArgConstraint *arg_ct)
+{
+    int ct;
+    ct = arg_ct->ct;
+    if (ct & TCG_CT_CONST)
+        return 1;
+    else
+        return 0;
+}
+
+#define ARITH_ADD 0
+#define ARITH_OR  1
+#define ARITH_ADC 2
+#define ARITH_SBB 3
+#define ARITH_AND 4
+#define ARITH_SUB 5
+#define ARITH_XOR 6
+#define ARITH_CMP 7
+
+#define SHIFT_SHL 4
+#define SHIFT_SHR 5
+#define SHIFT_SAR 7
+
+#define JCC_JMP (-1)
+#define JCC_JO  0x0
+#define JCC_JNO 0x1
+#define JCC_JB  0x2
+#define JCC_JAE 0x3
+#define JCC_JE  0x4
+#define JCC_JNE 0x5
+#define JCC_JBE 0x6
+#define JCC_JA  0x7
+#define JCC_JS  0x8
+#define JCC_JNS 0x9
+#define JCC_JP  0xa
+#define JCC_JNP 0xb
+#define JCC_JL  0xc
+#define JCC_JGE 0xd
+#define JCC_JLE 0xe
+#define JCC_JG  0xf
+
+#define P_EXT   0x100 /* 0x0f opcode prefix */
+
+static const uint8_t tcg_cond_to_jcc[10] = {
+    [TCG_COND_EQ] = JCC_JE,
+    [TCG_COND_NE] = JCC_JNE,
+    [TCG_COND_LT] = JCC_JL,
+    [TCG_COND_GE] = JCC_JGE,
+    [TCG_COND_LE] = JCC_JLE,
+    [TCG_COND_GT] = JCC_JG,
+    [TCG_COND_LTU] = JCC_JB,
+    [TCG_COND_GEU] = JCC_JAE,
+    [TCG_COND_LEU] = JCC_JBE,
+    [TCG_COND_GTU] = JCC_JA,
+};
+
+static inline void tcg_out_opc(TCGContext *s, int opc)
+{
+    if (opc & P_EXT)
+        tcg_out8(s, 0x0f);
+    tcg_out8(s, opc);
+}
+
+static inline void tcg_out_modrm(TCGContext *s, int opc, int r, int rm)
+{
+    tcg_out_opc(s, opc);
+    tcg_out8(s, 0xc0 | (r << 3) | rm);
+}
+
+/* rm == -1 means no register index */
+static inline void tcg_out_modrm_offset(TCGContext *s, int opc, int r, int rm, 
+                                        int32_t offset)
+{
+    tcg_out_opc(s, opc);
+    if (rm == -1) {
+        tcg_out8(s, 0x05 | (r << 3));
+        tcg_out32(s, offset);
+    } else if (offset == 0 && rm != TCG_REG_EBP) {
+        if (rm == TCG_REG_ESP) {
+            tcg_out8(s, 0x04 | (r << 3));
+            tcg_out8(s, 0x24);
+        } else {
+            tcg_out8(s, 0x00 | (r << 3) | rm);
+        }
+    } else if ((int8_t)offset == offset) {
+        if (rm == TCG_REG_ESP) {
+            tcg_out8(s, 0x44 | (r << 3));
+            tcg_out8(s, 0x24);
+        } else {
+            tcg_out8(s, 0x40 | (r << 3) | rm);
+        }
+        tcg_out8(s, offset);
+    } else {
+        if (rm == TCG_REG_ESP) {
+            tcg_out8(s, 0x84 | (r << 3));
+            tcg_out8(s, 0x24);
+        } else {
+            tcg_out8(s, 0x80 | (r << 3) | rm);
+        }
+        tcg_out32(s, offset);
+    }
+}
+
+static inline void tcg_out_mov(TCGContext *s, int ret, int arg)
+{
+    if (arg != ret)
+        tcg_out_modrm(s, 0x8b, ret, arg);
+}
+
+static inline void tcg_out_movi(TCGContext *s, TCGType type,
+                                int ret, int32_t arg)
+{
+    if (arg == 0) {
+        /* xor r0,r0 */
+        tcg_out_modrm(s, 0x01 | (ARITH_XOR << 3), ret, ret);
+    } else {
+        tcg_out8(s, 0xb8 + ret);
+        tcg_out32(s, arg);
+    }
+}
+
+static inline void tcg_out_ld(TCGContext *s, int ret, 
+                              int arg1, int32_t arg2)
+{
+    /* movl */
+    tcg_out_modrm_offset(s, 0x8b, ret, arg1, arg2);
+}
+
+static inline void tcg_out_st(TCGContext *s, int arg, 
+                              int arg1, int32_t arg2)
+{
+    /* movl */
+    tcg_out_modrm_offset(s, 0x89, arg, arg1, arg2);
+}
+
+static inline void tgen_arithi(TCGContext *s, int c, int r0, int32_t val)
+{
+    if (val == (int8_t)val) {
+        tcg_out_modrm(s, 0x83, c, r0);
+        tcg_out8(s, val);
+    } else {
+        tcg_out_modrm(s, 0x81, c, r0);
+        tcg_out32(s, val);
+    }
+}
+
+void tcg_out_addi(TCGContext *s, int reg, tcg_target_long val)
+{
+    if (val != 0)
+        tgen_arithi(s, ARITH_ADD, reg, val);
+}
+
+static void tcg_out_jxx(TCGContext *s, int opc, int label_index)
+{
+    int32_t val, val1;
+    TCGLabel *l = &s->labels[label_index];
+    
+    if (l->has_value) {
+        val = l->u.value - (tcg_target_long)s->code_ptr;
+        val1 = val - 2;
+        if ((int8_t)val1 == val1) {
+            if (opc == -1)
+                tcg_out8(s, 0xeb);
+            else
+                tcg_out8(s, 0x70 + opc);
+            tcg_out8(s, val1);
+        } else {
+            if (opc == -1) {
+                tcg_out8(s, 0xe9);
+                tcg_out32(s, val - 5);
+            } else {
+                tcg_out8(s, 0x0f);
+                tcg_out8(s, 0x80 + opc);
+                tcg_out32(s, val - 6);
+            }
+        }
+    } else {
+        if (opc == -1) {
+            tcg_out8(s, 0xe9);
+        } else {
+            tcg_out8(s, 0x0f);
+            tcg_out8(s, 0x80 + opc);
+        }
+        tcg_out_reloc(s, s->code_ptr, R_386_PC32, label_index, -4);
+        tcg_out32(s, -4);
+    }
+}
+
+static void tcg_out_brcond(TCGContext *s, int cond, 
+                           TCGArg arg1, TCGArg arg2, int const_arg2,
+                           int label_index)
+{
+    int c;
+    if (const_arg2) {
+        if (arg2 == 0) {
+            /* use test */
+            switch(cond) {
+            case TCG_COND_EQ:
+                c = JCC_JNE;
+                break;
+            case TCG_COND_NE:
+                c = JCC_JNE;
+                break;
+            case TCG_COND_LT:
+                c = JCC_JS;
+                break;
+            case TCG_COND_GE:
+                c = JCC_JNS;
+                break;
+            default:
+                goto do_cmpi;
+            }
+            /* test r, r */
+            tcg_out_modrm(s, 0x85, arg1, arg1);
+            tcg_out_jxx(s, c, label_index);
+        } else {
+        do_cmpi:
+            tgen_arithi(s, ARITH_CMP, arg1, arg2);
+            tcg_out_jxx(s, tcg_cond_to_jcc[cond], label_index);
+        }
+    } else {
+        tcg_out_modrm(s, 0x01 | (ARITH_CMP << 3), arg1, arg2);
+        tcg_out_jxx(s, tcg_cond_to_jcc[cond], label_index);
+    }
+}
+
+/* XXX: we implement it at the target level to avoid having to
+   handle cross basic blocks temporaries */
+static void tcg_out_brcond2(TCGContext *s,
+                            const TCGArg *args, const int *const_args)
+{
+    int label_next;
+    label_next = gen_new_label();
+    switch(args[4]) {
+    case TCG_COND_EQ:
+        tcg_out_brcond(s, TCG_COND_NE, args[0], args[2], const_args[2], label_next);
+        tcg_out_brcond(s, TCG_COND_EQ, args[1], args[3], const_args[3], args[5]);
+        break;
+    case TCG_COND_NE:
+        tcg_out_brcond(s, TCG_COND_NE, args[0], args[2], const_args[2], args[5]);
+        tcg_out_brcond(s, TCG_COND_EQ, args[1], args[3], const_args[3], label_next);
+        break;
+    case TCG_COND_LT:
+        tcg_out_brcond(s, TCG_COND_LT, args[1], args[3], const_args[3], args[5]);
+        tcg_out_brcond(s, TCG_COND_NE, args[1], args[3], const_args[3], label_next);
+        tcg_out_brcond(s, TCG_COND_LT, args[0], args[2], const_args[2], args[5]);
+        break;
+    case TCG_COND_LE:
+        tcg_out_brcond(s, TCG_COND_LT, args[1], args[3], const_args[3], args[5]);
+        tcg_out_brcond(s, TCG_COND_NE, args[1], args[3], const_args[3], label_next);
+        tcg_out_brcond(s, TCG_COND_LE, args[0], args[2], const_args[2], args[5]);
+        break;
+    case TCG_COND_GT:
+        tcg_out_brcond(s, TCG_COND_GT, args[1], args[3], const_args[3], args[5]);
+        tcg_out_brcond(s, TCG_COND_NE, args[1], args[3], const_args[3], label_next);
+        tcg_out_brcond(s, TCG_COND_GT, args[0], args[2], const_args[2], args[5]);
+        break;
+    case TCG_COND_GE:
+        tcg_out_brcond(s, TCG_COND_GT, args[1], args[3], const_args[3], args[5]);
+        tcg_out_brcond(s, TCG_COND_NE, args[1], args[3], const_args[3], label_next);
+        tcg_out_brcond(s, TCG_COND_GE, args[0], args[2], const_args[2], args[5]);
+        break;
+    case TCG_COND_LTU:
+        tcg_out_brcond(s, TCG_COND_LTU, args[1], args[3], const_args[3], args[5]);
+        tcg_out_brcond(s, TCG_COND_NE, args[1], args[3], const_args[3], label_next);
+        tcg_out_brcond(s, TCG_COND_LTU, args[0], args[2], const_args[2], args[5]);
+        break;
+    case TCG_COND_LEU:
+        tcg_out_brcond(s, TCG_COND_LTU, args[1], args[3], const_args[3], args[5]);
+        tcg_out_brcond(s, TCG_COND_NE, args[1], args[3], const_args[3], label_next);
+        tcg_out_brcond(s, TCG_COND_LEU, args[0], args[2], const_args[2], args[5]);
+        break;
+    case TCG_COND_GTU:
+        tcg_out_brcond(s, TCG_COND_GTU, args[1], args[3], const_args[3], args[5]);
+        tcg_out_brcond(s, TCG_COND_NE, args[1], args[3], const_args[3], label_next);
+        tcg_out_brcond(s, TCG_COND_GTU, args[0], args[2], const_args[2], args[5]);
+        break;
+    case TCG_COND_GEU:
+        tcg_out_brcond(s, TCG_COND_GTU, args[1], args[3], const_args[3], args[5]);
+        tcg_out_brcond(s, TCG_COND_NE, args[1], args[3], const_args[3], label_next);
+        tcg_out_brcond(s, TCG_COND_GEU, args[0], args[2], const_args[2], args[5]);
+        break;
+    default:
+        tcg_abort();
+    }
+    tcg_out_label(s, label_next, (tcg_target_long)s->code_ptr);
+}
+
+#if defined(CONFIG_SOFTMMU)
+extern void __ldb_mmu(void);
+extern void __ldw_mmu(void);
+extern void __ldl_mmu(void);
+extern void __ldq_mmu(void);
+
+extern void __stb_mmu(void);
+extern void __stw_mmu(void);
+extern void __stl_mmu(void);
+extern void __stq_mmu(void);
+
+static void *qemu_ld_helpers[4] = {
+    __ldb_mmu,
+    __ldw_mmu,
+    __ldl_mmu,
+    __ldq_mmu,
+};
+
+static void *qemu_st_helpers[4] = {
+    __stb_mmu,
+    __stw_mmu,
+    __stl_mmu,
+    __stq_mmu,
+};
+#endif
+
+/* XXX: qemu_ld and qemu_st could be modified to clobber only EDX and
+   EAX. It will be useful once fixed registers globals are less
+   common. */
+static void tcg_out_qemu_ld(TCGContext *s, const TCGArg *args,
+                            int opc)
+{
+    int addr_reg, data_reg, data_reg2, r0, r1, mem_index, s_bits, bswap;
+#if defined(CONFIG_SOFTMMU)
+    uint8_t *label1_ptr, *label2_ptr;
+#endif
+#if TARGET_LONG_BITS == 64
+#if defined(CONFIG_SOFTMMU)
+    uint8_t *label3_ptr;
+#endif
+    int addr_reg2;
+#endif
+
+    data_reg = *args++;
+    if (opc == 3)
+        data_reg2 = *args++;
+    else
+        data_reg2 = 0;
+    addr_reg = *args++;
+#if TARGET_LONG_BITS == 64
+    addr_reg2 = *args++;
+#endif
+    mem_index = *args;
+    s_bits = opc & 3;
+
+    r0 = TCG_REG_EAX;
+    r1 = TCG_REG_EDX;
+
+#if defined(CONFIG_SOFTMMU)
+    tcg_out_mov(s, r1, addr_reg); 
+
+    tcg_out_mov(s, r0, addr_reg); 
+ 
+    tcg_out_modrm(s, 0xc1, 5, r1); /* shr $x, r1 */
+    tcg_out8(s, TARGET_PAGE_BITS - CPU_TLB_ENTRY_BITS); 
+    
+    tcg_out_modrm(s, 0x81, 4, r0); /* andl $x, r0 */
+    tcg_out32(s, TARGET_PAGE_MASK | ((1 << s_bits) - 1));
+    
+    tcg_out_modrm(s, 0x81, 4, r1); /* andl $x, r1 */
+    tcg_out32(s, (CPU_TLB_SIZE - 1) << CPU_TLB_ENTRY_BITS);
+
+    tcg_out_opc(s, 0x8d); /* lea offset(r1, %ebp), r1 */
+    tcg_out8(s, 0x80 | (r1 << 3) | 0x04);
+    tcg_out8(s, (5 << 3) | r1);
+    tcg_out32(s, offsetof(CPUState, tlb_table[mem_index][0].addr_read));
+
+    /* cmp 0(r1), r0 */
+    tcg_out_modrm_offset(s, 0x3b, r0, r1, 0);
+    
+    tcg_out_mov(s, r0, addr_reg);
+    
+#if TARGET_LONG_BITS == 32
+    /* je label1 */
+    tcg_out8(s, 0x70 + JCC_JE);
+    label1_ptr = s->code_ptr;
+    s->code_ptr++;
+#else
+    /* jne label3 */
+    tcg_out8(s, 0x70 + JCC_JNE);
+    label3_ptr = s->code_ptr;
+    s->code_ptr++;
+    
+    /* cmp 4(r1), addr_reg2 */
+    tcg_out_modrm_offset(s, 0x3b, addr_reg2, r1, 4);
+
+    /* je label1 */
+    tcg_out8(s, 0x70 + JCC_JE);
+    label1_ptr = s->code_ptr;
+    s->code_ptr++;
+    
+    /* label3: */
+    *label3_ptr = s->code_ptr - label3_ptr - 1;
+#endif
+
+    /* XXX: move that code at the end of the TB */
+#if TARGET_LONG_BITS == 32
+    tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_EDX, mem_index);
+#else
+    tcg_out_mov(s, TCG_REG_EDX, addr_reg2);
+    tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_ECX, mem_index);
+#endif
+    tcg_out8(s, 0xe8);
+    tcg_out32(s, (tcg_target_long)qemu_ld_helpers[s_bits] - 
+              (tcg_target_long)s->code_ptr - 4);
+
+    switch(opc) {
+    case 0 | 4:
+        /* movsbl */
+        tcg_out_modrm(s, 0xbe | P_EXT, data_reg, TCG_REG_EAX);
+        break;
+    case 1 | 4:
+        /* movswl */
+        tcg_out_modrm(s, 0xbf | P_EXT, data_reg, TCG_REG_EAX);
+        break;
+    case 0:
+    case 1:
+    case 2:
+    default:
+        tcg_out_mov(s, data_reg, TCG_REG_EAX);
+        break;
+    case 3:
+        if (data_reg == TCG_REG_EDX) {
+            tcg_out_opc(s, 0x90 + TCG_REG_EDX); /* xchg %edx, %eax */
+            tcg_out_mov(s, data_reg2, TCG_REG_EAX);
+        } else {
+            tcg_out_mov(s, data_reg, TCG_REG_EAX);
+            tcg_out_mov(s, data_reg2, TCG_REG_EDX);
+        }
+        break;
+    }
+
+    /* jmp label2 */
+    tcg_out8(s, 0xeb);
+    label2_ptr = s->code_ptr;
+    s->code_ptr++;
+    
+    /* label1: */
+    *label1_ptr = s->code_ptr - label1_ptr - 1;
+
+    /* add x(r1), r0 */
+    tcg_out_modrm_offset(s, 0x03, r0, r1, offsetof(CPUTLBEntry, addend) - 
+                         offsetof(CPUTLBEntry, addr_read));
+#else
+    r0 = addr_reg;
+#endif
+
+#ifdef TARGET_WORDS_BIGENDIAN
+    bswap = 1;
+#else
+    bswap = 0;
+#endif
+    switch(opc) {
+    case 0:
+        /* movzbl */
+        tcg_out_modrm_offset(s, 0xb6 | P_EXT, data_reg, r0, 0);
+        break;
+    case 0 | 4:
+        /* movsbl */
+        tcg_out_modrm_offset(s, 0xbe | P_EXT, data_reg, r0, 0);
+        break;
+    case 1:
+        /* movzwl */
+        tcg_out_modrm_offset(s, 0xb7 | P_EXT, data_reg, r0, 0);
+        if (bswap) {
+            /* rolw $8, data_reg */
+            tcg_out8(s, 0x66); 
+            tcg_out_modrm(s, 0xc1, 0, data_reg);
+            tcg_out8(s, 8);
+        }
+        break;
+    case 1 | 4:
+        /* movswl */
+        tcg_out_modrm_offset(s, 0xbf | P_EXT, data_reg, r0, 0);
+        if (bswap) {
+            /* rolw $8, data_reg */
+            tcg_out8(s, 0x66); 
+            tcg_out_modrm(s, 0xc1, 0, data_reg);
+            tcg_out8(s, 8);
+
+            /* movswl data_reg, data_reg */
+            tcg_out_modrm(s, 0xbf | P_EXT, data_reg, data_reg);
+        }
+        break;
+    case 2:
+        /* movl (r0), data_reg */
+        tcg_out_modrm_offset(s, 0x8b, data_reg, r0, 0);
+        if (bswap) {
+            /* bswap */
+            tcg_out_opc(s, (0xc8 + data_reg) | P_EXT);
+        }
+        break;
+    case 3:
+        /* XXX: could be nicer */
+        if (r0 == data_reg) {
+            r1 = TCG_REG_EDX;
+            if (r1 == data_reg)
+                r1 = TCG_REG_EAX;
+            tcg_out_mov(s, r1, r0);
+            r0 = r1;
+        }
+        if (!bswap) {
+            tcg_out_modrm_offset(s, 0x8b, data_reg, r0, 0);
+            tcg_out_modrm_offset(s, 0x8b, data_reg2, r0, 4);
+        } else {
+            tcg_out_modrm_offset(s, 0x8b, data_reg, r0, 4);
+            tcg_out_opc(s, (0xc8 + data_reg) | P_EXT);
+
+            tcg_out_modrm_offset(s, 0x8b, data_reg2, r0, 0);
+            /* bswap */
+            tcg_out_opc(s, (0xc8 + data_reg2) | P_EXT);
+        }
+        break;
+    default:
+        tcg_abort();
+    }
+
+#if defined(CONFIG_SOFTMMU)
+    /* label2: */
+    *label2_ptr = s->code_ptr - label2_ptr - 1;
+#endif
+}
+
+
+static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args,
+                            int opc)
+{
+    int addr_reg, data_reg, data_reg2, r0, r1, mem_index, s_bits, bswap;
+#if defined(CONFIG_SOFTMMU)
+    uint8_t *label1_ptr, *label2_ptr;
+#endif
+#if TARGET_LONG_BITS == 64
+#if defined(CONFIG_SOFTMMU)
+    uint8_t *label3_ptr;
+#endif
+    int addr_reg2;
+#endif
+
+    data_reg = *args++;
+    if (opc == 3)
+        data_reg2 = *args++;
+    else
+        data_reg2 = 0;
+    addr_reg = *args++;
+#if TARGET_LONG_BITS == 64
+    addr_reg2 = *args++;
+#endif
+    mem_index = *args;
+
+    s_bits = opc;
+
+    r0 = TCG_REG_EAX;
+    r1 = TCG_REG_EDX;
+
+#if defined(CONFIG_SOFTMMU)
+    tcg_out_mov(s, r1, addr_reg); 
+
+    tcg_out_mov(s, r0, addr_reg); 
+ 
+    tcg_out_modrm(s, 0xc1, 5, r1); /* shr $x, r1 */
+    tcg_out8(s, TARGET_PAGE_BITS - CPU_TLB_ENTRY_BITS); 
+    
+    tcg_out_modrm(s, 0x81, 4, r0); /* andl $x, r0 */
+    tcg_out32(s, TARGET_PAGE_MASK | ((1 << s_bits) - 1));
+    
+    tcg_out_modrm(s, 0x81, 4, r1); /* andl $x, r1 */
+    tcg_out32(s, (CPU_TLB_SIZE - 1) << CPU_TLB_ENTRY_BITS);
+
+    tcg_out_opc(s, 0x8d); /* lea offset(r1, %ebp), r1 */
+    tcg_out8(s, 0x80 | (r1 << 3) | 0x04);
+    tcg_out8(s, (5 << 3) | r1);
+    tcg_out32(s, offsetof(CPUState, tlb_table[mem_index][0].addr_write));
+
+    /* cmp 0(r1), r0 */
+    tcg_out_modrm_offset(s, 0x3b, r0, r1, 0);
+    
+    tcg_out_mov(s, r0, addr_reg);
+    
+#if TARGET_LONG_BITS == 32
+    /* je label1 */
+    tcg_out8(s, 0x70 + JCC_JE);
+    label1_ptr = s->code_ptr;
+    s->code_ptr++;
+#else
+    /* jne label3 */
+    tcg_out8(s, 0x70 + JCC_JNE);
+    label3_ptr = s->code_ptr;
+    s->code_ptr++;
+    
+    /* cmp 4(r1), addr_reg2 */
+    tcg_out_modrm_offset(s, 0x3b, addr_reg2, r1, 4);
+
+    /* je label1 */
+    tcg_out8(s, 0x70 + JCC_JE);
+    label1_ptr = s->code_ptr;
+    s->code_ptr++;
+    
+    /* label3: */
+    *label3_ptr = s->code_ptr - label3_ptr - 1;
+#endif
+
+    /* XXX: move that code at the end of the TB */
+#if TARGET_LONG_BITS == 32
+    if (opc == 3) {
+        tcg_out_mov(s, TCG_REG_EDX, data_reg);
+        tcg_out_mov(s, TCG_REG_ECX, data_reg2);
+        tcg_out8(s, 0x6a); /* push Ib */
+        tcg_out8(s, mem_index);
+        tcg_out8(s, 0xe8);
+        tcg_out32(s, (tcg_target_long)qemu_st_helpers[s_bits] - 
+                  (tcg_target_long)s->code_ptr - 4);
+        tcg_out_addi(s, TCG_REG_ESP, 4);
+    } else {
+        switch(opc) {
+        case 0:
+            /* movzbl */
+            tcg_out_modrm(s, 0xb6 | P_EXT, TCG_REG_EDX, data_reg);
+            break;
+        case 1:
+            /* movzwl */
+            tcg_out_modrm(s, 0xb7 | P_EXT, TCG_REG_EDX, data_reg);
+            break;
+        case 2:
+            tcg_out_mov(s, TCG_REG_EDX, data_reg);
+            break;
+        }
+        tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_ECX, mem_index);
+        tcg_out8(s, 0xe8);
+        tcg_out32(s, (tcg_target_long)qemu_st_helpers[s_bits] - 
+                  (tcg_target_long)s->code_ptr - 4);
+    }
+#else
+    if (opc == 3) {
+        tcg_out_mov(s, TCG_REG_EDX, addr_reg2);
+        tcg_out8(s, 0x6a); /* push Ib */
+        tcg_out8(s, mem_index);
+        tcg_out_opc(s, 0x50 + data_reg2); /* push */
+        tcg_out_opc(s, 0x50 + data_reg); /* push */
+        tcg_out8(s, 0xe8);
+        tcg_out32(s, (tcg_target_long)qemu_st_helpers[s_bits] - 
+                  (tcg_target_long)s->code_ptr - 4);
+        tcg_out_addi(s, TCG_REG_ESP, 12);
+    } else {
+        tcg_out_mov(s, TCG_REG_EDX, addr_reg2);
+        switch(opc) {
+        case 0:
+            /* movzbl */
+            tcg_out_modrm(s, 0xb6 | P_EXT, TCG_REG_ECX, data_reg);
+            break;
+        case 1:
+            /* movzwl */
+            tcg_out_modrm(s, 0xb7 | P_EXT, TCG_REG_ECX, data_reg);
+            break;
+        case 2:
+            tcg_out_mov(s, TCG_REG_ECX, data_reg);
+            break;
+        }
+        tcg_out8(s, 0x6a); /* push Ib */
+        tcg_out8(s, mem_index);
+        tcg_out8(s, 0xe8);
+        tcg_out32(s, (tcg_target_long)qemu_st_helpers[s_bits] - 
+                  (tcg_target_long)s->code_ptr - 4);
+        tcg_out_addi(s, TCG_REG_ESP, 4);
+    }
+#endif
+    
+    /* jmp label2 */
+    tcg_out8(s, 0xeb);
+    label2_ptr = s->code_ptr;
+    s->code_ptr++;
+    
+    /* label1: */
+    *label1_ptr = s->code_ptr - label1_ptr - 1;
+
+    /* add x(r1), r0 */
+    tcg_out_modrm_offset(s, 0x03, r0, r1, offsetof(CPUTLBEntry, addend) - 
+                         offsetof(CPUTLBEntry, addr_write));
+#else
+    r0 = addr_reg;
+#endif
+
+#ifdef TARGET_WORDS_BIGENDIAN
+    bswap = 1;
+#else
+    bswap = 0;
+#endif
+    switch(opc) {
+    case 0:
+        /* movb */
+        tcg_out_modrm_offset(s, 0x88, data_reg, r0, 0);
+        break;
+    case 1:
+        if (bswap) {
+            tcg_out_mov(s, r1, data_reg);
+            tcg_out8(s, 0x66); /* rolw $8, %ecx */
+            tcg_out_modrm(s, 0xc1, 0, r1);
+            tcg_out8(s, 8);
+            data_reg = r1;
+        }
+        /* movw */
+        tcg_out8(s, 0x66);
+        tcg_out_modrm_offset(s, 0x89, data_reg, r0, 0);
+        break;
+    case 2:
+        if (bswap) {
+            tcg_out_mov(s, r1, data_reg);
+            /* bswap data_reg */
+            tcg_out_opc(s, (0xc8 + r1) | P_EXT);
+            data_reg = r1;
+        }
+        /* movl */
+        tcg_out_modrm_offset(s, 0x89, data_reg, r0, 0);
+        break;
+    case 3:
+        if (bswap) {
+            tcg_out_mov(s, r1, data_reg2);
+            /* bswap data_reg */
+            tcg_out_opc(s, (0xc8 + r1) | P_EXT);
+            tcg_out_modrm_offset(s, 0x89, r1, r0, 0);
+            tcg_out_mov(s, r1, data_reg);
+            /* bswap data_reg */
+            tcg_out_opc(s, (0xc8 + r1) | P_EXT);
+            tcg_out_modrm_offset(s, 0x89, r1, r0, 4);
+        } else {
+            tcg_out_modrm_offset(s, 0x89, data_reg, r0, 0);
+            tcg_out_modrm_offset(s, 0x89, data_reg2, r0, 4);
+        }
+        break;
+    default:
+        tcg_abort();
+    }
+
+#if defined(CONFIG_SOFTMMU)
+    /* label2: */
+    *label2_ptr = s->code_ptr - label2_ptr - 1;
+#endif
+}
+
+static inline void tcg_out_op(TCGContext *s, int opc, 
+                              const TCGArg *args, const int *const_args)
+{
+    int c;
+    
+    switch(opc) {
+    case INDEX_op_exit_tb:
+        tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_EAX, args[0]);
+        tcg_out8(s, 0xc3); /* ret */
+        break;
+    case INDEX_op_goto_tb:
+        if (s->tb_jmp_offset) {
+            /* direct jump method */
+            tcg_out8(s, 0xe9); /* jmp im */
+            s->tb_jmp_offset[args[0]] = s->code_ptr - s->code_buf;
+            tcg_out32(s, 0);
+        } else {
+            /* indirect jump method */
+            /* jmp Ev */
+            tcg_out_modrm_offset(s, 0xff, 4, -1, 
+                                 (tcg_target_long)(s->tb_next + args[0]));
+        }
+        s->tb_next_offset[args[0]] = s->code_ptr - s->code_buf;
+        break;
+    case INDEX_op_call:
+        if (const_args[0]) {
+            tcg_out8(s, 0xe8);
+            tcg_out32(s, args[0] - (tcg_target_long)s->code_ptr - 4);
+        } else {
+            tcg_out_modrm(s, 0xff, 2, args[0]);
+        }
+        break;
+    case INDEX_op_jmp:
+        if (const_args[0]) {
+            tcg_out8(s, 0xe9);
+            tcg_out32(s, args[0] - (tcg_target_long)s->code_ptr - 4);
+        } else {
+            tcg_out_modrm(s, 0xff, 4, args[0]);
+        }
+        break;
+    case INDEX_op_br:
+        tcg_out_jxx(s, JCC_JMP, args[0]);
+        break;
+    case INDEX_op_movi_i32:
+        tcg_out_movi(s, TCG_TYPE_I32, args[0], args[1]);
+        break;
+    case INDEX_op_ld8u_i32:
+        /* movzbl */
+        tcg_out_modrm_offset(s, 0xb6 | P_EXT, args[0], args[1], args[2]);
+        break;
+    case INDEX_op_ld8s_i32:
+        /* movsbl */
+        tcg_out_modrm_offset(s, 0xbe | P_EXT, args[0], args[1], args[2]);
+        break;
+    case INDEX_op_ld16u_i32:
+        /* movzwl */
+        tcg_out_modrm_offset(s, 0xb7 | P_EXT, args[0], args[1], args[2]);
+        break;
+    case INDEX_op_ld16s_i32:
+        /* movswl */
+        tcg_out_modrm_offset(s, 0xbf | P_EXT, args[0], args[1], args[2]);
+        break;
+    case INDEX_op_ld_i32:
+        /* movl */
+        tcg_out_modrm_offset(s, 0x8b, args[0], args[1], args[2]);
+        break;
+    case INDEX_op_st8_i32:
+        /* movb */
+        tcg_out_modrm_offset(s, 0x88, args[0], args[1], args[2]);
+        break;
+    case INDEX_op_st16_i32:
+        /* movw */
+        tcg_out8(s, 0x66);
+        tcg_out_modrm_offset(s, 0x89, args[0], args[1], args[2]);
+        break;
+    case INDEX_op_st_i32:
+        /* movl */
+        tcg_out_modrm_offset(s, 0x89, args[0], args[1], args[2]);
+        break;
+    case INDEX_op_sub_i32:
+        c = ARITH_SUB;
+        goto gen_arith;
+    case INDEX_op_and_i32:
+        c = ARITH_AND;
+        goto gen_arith;
+    case INDEX_op_or_i32:
+        c = ARITH_OR;
+        goto gen_arith;
+    case INDEX_op_xor_i32:
+        c = ARITH_XOR;
+        goto gen_arith;
+    case INDEX_op_add_i32:
+        c = ARITH_ADD;
+    gen_arith:
+        if (const_args[2]) {
+            tgen_arithi(s, c, args[0], args[2]);
+        } else {
+            tcg_out_modrm(s, 0x01 | (c << 3), args[2], args[0]);
+        }
+        break;
+    case INDEX_op_mul_i32:
+        if (const_args[2]) {
+            int32_t val;
+            val = args[2];
+            if (val == (int8_t)val) {
+                tcg_out_modrm(s, 0x6b, args[0], args[0]);
+                tcg_out8(s, val);
+            } else {
+                tcg_out_modrm(s, 0x69, args[0], args[0]);
+                tcg_out32(s, val);
+            }
+        } else {
+            tcg_out_modrm(s, 0xaf | P_EXT, args[0], args[2]);
+        }
+        break;
+    case INDEX_op_mulu2_i32:
+        tcg_out_modrm(s, 0xf7, 4, args[3]);
+        break;
+    case INDEX_op_div2_i32:
+        tcg_out_modrm(s, 0xf7, 7, args[4]);
+        break;
+    case INDEX_op_divu2_i32:
+        tcg_out_modrm(s, 0xf7, 6, args[4]);
+        break;
+    case INDEX_op_shl_i32:
+        c = SHIFT_SHL;
+    gen_shift32:
+        if (const_args[2]) {
+            if (args[2] == 1) {
+                tcg_out_modrm(s, 0xd1, c, args[0]);
+            } else {
+                tcg_out_modrm(s, 0xc1, c, args[0]);
+                tcg_out8(s, args[2]);
+            }
+        } else {
+            tcg_out_modrm(s, 0xd3, c, args[0]);
+        }
+        break;
+    case INDEX_op_shr_i32:
+        c = SHIFT_SHR;
+        goto gen_shift32;
+    case INDEX_op_sar_i32:
+        c = SHIFT_SAR;
+        goto gen_shift32;
+        
+    case INDEX_op_add2_i32:
+        if (const_args[4]) 
+            tgen_arithi(s, ARITH_ADD, args[0], args[4]);
+        else
+            tcg_out_modrm(s, 0x01 | (ARITH_ADD << 3), args[4], args[0]);
+        if (const_args[5]) 
+            tgen_arithi(s, ARITH_ADC, args[1], args[5]);
+        else
+            tcg_out_modrm(s, 0x01 | (ARITH_ADC << 3), args[5], args[1]);
+        break;
+    case INDEX_op_sub2_i32:
+        if (const_args[4]) 
+            tgen_arithi(s, ARITH_SUB, args[0], args[4]);
+        else
+            tcg_out_modrm(s, 0x01 | (ARITH_SUB << 3), args[4], args[0]);
+        if (const_args[5]) 
+            tgen_arithi(s, ARITH_SBB, args[1], args[5]);
+        else
+            tcg_out_modrm(s, 0x01 | (ARITH_SBB << 3), args[5], args[1]);
+        break;
+    case INDEX_op_brcond_i32:
+        tcg_out_brcond(s, args[2], args[0], args[1], const_args[1], args[3]);
+        break;
+    case INDEX_op_brcond2_i32:
+        tcg_out_brcond2(s, args, const_args);
+        break;
+
+    case INDEX_op_qemu_ld8u:
+        tcg_out_qemu_ld(s, args, 0);
+        break;
+    case INDEX_op_qemu_ld8s:
+        tcg_out_qemu_ld(s, args, 0 | 4);
+        break;
+    case INDEX_op_qemu_ld16u:
+        tcg_out_qemu_ld(s, args, 1);
+        break;
+    case INDEX_op_qemu_ld16s:
+        tcg_out_qemu_ld(s, args, 1 | 4);
+        break;
+    case INDEX_op_qemu_ld32u:
+        tcg_out_qemu_ld(s, args, 2);
+        break;
+    case INDEX_op_qemu_ld64:
+        tcg_out_qemu_ld(s, args, 3);
+        break;
+        
+    case INDEX_op_qemu_st8:
+        tcg_out_qemu_st(s, args, 0);
+        break;
+    case INDEX_op_qemu_st16:
+        tcg_out_qemu_st(s, args, 1);
+        break;
+    case INDEX_op_qemu_st32:
+        tcg_out_qemu_st(s, args, 2);
+        break;
+    case INDEX_op_qemu_st64:
+        tcg_out_qemu_st(s, args, 3);
+        break;
+
+    default:
+        tcg_abort();
+    }
+}
+
+static const TCGTargetOpDef x86_op_defs[] = {
+    { INDEX_op_exit_tb, { } },
+    { INDEX_op_goto_tb, { } },
+    { INDEX_op_call, { "ri" } },
+    { INDEX_op_jmp, { "ri" } },
+    { INDEX_op_br, { } },
+    { INDEX_op_mov_i32, { "r", "r" } },
+    { INDEX_op_movi_i32, { "r" } },
+    { INDEX_op_ld8u_i32, { "r", "r" } },
+    { INDEX_op_ld8s_i32, { "r", "r" } },
+    { INDEX_op_ld16u_i32, { "r", "r" } },
+    { INDEX_op_ld16s_i32, { "r", "r" } },
+    { INDEX_op_ld_i32, { "r", "r" } },
+    { INDEX_op_st8_i32, { "q", "r" } },
+    { INDEX_op_st16_i32, { "r", "r" } },
+    { INDEX_op_st_i32, { "r", "r" } },
+
+    { INDEX_op_add_i32, { "r", "0", "ri" } },
+    { INDEX_op_sub_i32, { "r", "0", "ri" } },
+    { INDEX_op_mul_i32, { "r", "0", "ri" } },
+    { INDEX_op_mulu2_i32, { "a", "d", "a", "r" } },
+    { INDEX_op_div2_i32, { "a", "d", "0", "1", "r" } },
+    { INDEX_op_divu2_i32, { "a", "d", "0", "1", "r" } },
+    { INDEX_op_and_i32, { "r", "0", "ri" } },
+    { INDEX_op_or_i32, { "r", "0", "ri" } },
+    { INDEX_op_xor_i32, { "r", "0", "ri" } },
+
+    { INDEX_op_shl_i32, { "r", "0", "ci" } },
+    { INDEX_op_shr_i32, { "r", "0", "ci" } },
+    { INDEX_op_sar_i32, { "r", "0", "ci" } },
+
+    { INDEX_op_brcond_i32, { "r", "ri" } },
+
+    { INDEX_op_add2_i32, { "r", "r", "0", "1", "ri", "ri" } },
+    { INDEX_op_sub2_i32, { "r", "r", "0", "1", "ri", "ri" } },
+    { INDEX_op_brcond2_i32, { "r", "r", "ri", "ri" } },
+
+#if TARGET_LONG_BITS == 32
+    { INDEX_op_qemu_ld8u, { "r", "L" } },
+    { INDEX_op_qemu_ld8s, { "r", "L" } },
+    { INDEX_op_qemu_ld16u, { "r", "L" } },
+    { INDEX_op_qemu_ld16s, { "r", "L" } },
+    { INDEX_op_qemu_ld32u, { "r", "L" } },
+    { INDEX_op_qemu_ld64, { "r", "r", "L" } },
+
+    { INDEX_op_qemu_st8, { "cb", "L" } },
+    { INDEX_op_qemu_st16, { "L", "L" } },
+    { INDEX_op_qemu_st32, { "L", "L" } },
+    { INDEX_op_qemu_st64, { "L", "L", "L" } },
+#else
+    { INDEX_op_qemu_ld8u, { "r", "L", "L" } },
+    { INDEX_op_qemu_ld8s, { "r", "L", "L" } },
+    { INDEX_op_qemu_ld16u, { "r", "L", "L" } },
+    { INDEX_op_qemu_ld16s, { "r", "L", "L" } },
+    { INDEX_op_qemu_ld32u, { "r", "L", "L" } },
+    { INDEX_op_qemu_ld64, { "r", "r", "L", "L" } },
+
+    { INDEX_op_qemu_st8, { "cb", "L", "L" } },
+    { INDEX_op_qemu_st16, { "L", "L", "L" } },
+    { INDEX_op_qemu_st32, { "L", "L", "L" } },
+    { INDEX_op_qemu_st64, { "L", "L", "L", "L" } },
+#endif
+    { -1 },
+};
+
+void tcg_target_init(TCGContext *s)
+{
+    /* fail safe */
+    if ((1 << CPU_TLB_ENTRY_BITS) != sizeof(CPUTLBEntry))
+        tcg_abort();
+
+    tcg_regset_set32(tcg_target_available_regs[TCG_TYPE_I32], 0, 0xff);
+    tcg_regset_set32(tcg_target_call_clobber_regs, 0,
+                     (1 << TCG_REG_EAX) | 
+                     (1 << TCG_REG_EDX) | 
+                     (1 << TCG_REG_ECX));
+    
+    tcg_regset_clear(s->reserved_regs);
+    tcg_regset_set_reg(s->reserved_regs, TCG_REG_ESP);
+
+    tcg_add_target_add_op_defs(x86_op_defs);
+}
diff --git a/tcg/i386/tcg-target.h b/tcg/i386/tcg-target.h
new file mode 100644
index 0000000000..468e2d503e
--- /dev/null
+++ b/tcg/i386/tcg-target.h
@@ -0,0 +1,54 @@
+/*
+ * Tiny Code Generator for QEMU
+ *
+ * Copyright (c) 2008 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#define TCG_TARGET_I386 1
+
+#define TCG_TARGET_REG_BITS 32
+//#define TCG_TARGET_WORDS_BIGENDIAN
+
+#define TCG_TARGET_NB_REGS 8
+
+enum {
+    TCG_REG_EAX = 0,
+    TCG_REG_ECX,
+    TCG_REG_EDX,
+    TCG_REG_EBX,
+    TCG_REG_ESP,
+    TCG_REG_EBP,
+    TCG_REG_ESI,
+    TCG_REG_EDI,
+};
+
+/* used for function call generation */
+#define TCG_REG_CALL_STACK TCG_REG_ESP 
+#define TCG_TARGET_STACK_ALIGN 16
+
+/* Note: must be synced with dyngen-exec.h */
+#define TCG_AREG0 TCG_REG_EBP
+#define TCG_AREG1 TCG_REG_EBX
+#define TCG_AREG2 TCG_REG_ESI
+#define TCG_AREG3 TCG_REG_EDI
+
+static inline void flush_icache_range(unsigned long start, unsigned long stop)
+{
+}