x86/cpuid: move CPUID functions into separate file

about half of target-i386/helper.c consist of CPUID related functions.
Only one of them is a real TCG helper function. So move the whole
CPUID stuff out of this into a separate file to get better
maintainable parts.
This is only code reordering and should not affect QEMU's
functionality.

Signed-off-by: Andre Przywara <andre.przywara@amd.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

Makefile.target

@@ -49,6 +49,9 @@ libobj-y += tcg/tcg.o
 libobj-$(CONFIG_SOFTFLOAT) += fpu/softfloat.o
 libobj-$(CONFIG_NOSOFTFLOAT) += fpu/softfloat-native.o
 libobj-y += op_helper.o helper.o
+ifeq ($(TARGET_BASE_ARCH), i386)
+libobj-y += cpuid.o
+endif
 libobj-$(CONFIG_NEED_MMU) += mmu.o
 libobj-$(TARGET_ARM) += neon_helper.o iwmmxt_helper.o
 

target-i386/cpu.h

@@ -822,14 +822,17 @@ void cpu_x86_frstor(CPUX86State *s, target_ulong ptr, int data32);
 int cpu_x86_signal_handler(int host_signum, void *pinfo,
                            void *puc);
 
+/* cpuid.c */
+void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count,
+                   uint32_t *eax, uint32_t *ebx,
+                   uint32_t *ecx, uint32_t *edx);
+int cpu_x86_register (CPUX86State *env, const char *cpu_model);
+
 /* helper.c */
 int cpu_x86_handle_mmu_fault(CPUX86State *env, target_ulong addr,
                              int is_write, int mmu_idx, int is_softmmu);
 #define cpu_handle_mmu_fault cpu_x86_handle_mmu_fault
 void cpu_x86_set_a20(CPUX86State *env, int a20_state);
-void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count,
-                   uint32_t *eax, uint32_t *ebx,
-                   uint32_t *ecx, uint32_t *edx);
 
 static inline int hw_breakpoint_enabled(unsigned long dr7, int index)
 {