minor x86-64 corrections

diff -u -r1.1 apic.c
@@ -100,6 +100,18 @@
     return s->apicbase;
 }
 
+void cpu_set_apic_tpr(CPUState *env, uint8_t val)
+{
+    APICState *s = env->apic_state;
+    s->tpr = val;
+}
+
+uint8_t cpu_get_apic_tpr(CPUState *env)
+{
+    APICState *s = env->apic_state;
+    return s->tpr;
+}
+
 /* return -1 if no bit is set */
 static int get_highest_priority_int(uint32_t *tab)
 {

diff -u -r1.20 exec.h
@@ -167,6 +167,8 @@
 void cpu_x86_flush_tlb(CPUX86State *env, uint32_t addr);
 int cpu_x86_handle_mmu_fault(CPUX86State *env, target_ulong addr, 
                              int is_write, int is_user, int is_softmmu);
+void cpu_set_apic_tpr(CPUX86State *env, uint8_t val);
+uint8_t cpu_get_apic_tpr(CPUX86State *env);
 void tlb_fill(target_ulong addr, int is_write, int is_user, 
               void *retaddr);
 void __hidden cpu_lock(void);

diff -u -r1.40 helper.c
@@ -1454,8 +1454,12 @@
     selector &= 0xffff;
     if ((selector & 0xfffc) == 0) {
         /* null selector case */
-        if (seg_reg == R_SS)
-            raise_exception_err(EXCP0D_GPF, 0);
+        if (seg_reg == R_SS) {
+#ifdef TARGET_X86_64
+            if (!env->hflags & HF_CS64_MASK)
+#endif
+                raise_exception_err(EXCP0D_GPF, 0);
+        }
         cpu_x86_load_seg_cache(env, seg_reg, selector, 0, 0, 0);
     } else {
         

@@ -2156,6 +2160,11 @@
     case 4:
         cpu_x86_update_cr4(env, T0);
         break;
+#ifdef TARGET_X86_64
+    case 8:
+        cpu_set_apic_tpr(env, (T0 & 0xf) << 4);
+        break;
+#endif
     default:
         env->cr[reg] = T0;
         break;

diff -u -r1.28 op.c
@@ -1198,6 +1198,11 @@
     helper_movl_crN_T0(PARAM1);
 }
 
+void OPPROTO op_movtl_T0_cr8(void)
+{
+    T0 = (cpu_get_apic_tpr(env) & 0xf0) >> 4;
+}
+
 /* DR registers access */
 void OPPROTO op_movl_drN_T0(void)
 {

diff -u -r1.41 translate.c
@@ -5641,7 +5641,19 @@
                     gen_op_mov_reg_T0[ot][rm]();
                 }
                 break;
-                /* XXX: add CR8 for x86_64 */
+#ifdef TARGET_X86_64
+            case 8:
+                if (b & 2) {
+                    gen_op_mov_TN_reg[ot][0][rm]();
+                    gen_op_movl_crN_T0(reg);
+                    gen_jmp_im(s->pc - s->cs_base);
+                    gen_eob(s);
+                } else {
+                    gen_op_movtl_T0_cr8();
+                    gen_op_mov_reg_T0[ot][rm]();
+                }
+                break;
+#endif
             default:
                 goto illegal_op;
             }