# CPU tuning section - shared with UML.
  # Must change only cflags-y (or [yn]), not CFLAGS! That makes a difference for UML.

  #-mtune exists since gcc 3.4

  HAS_MTUNE	:= $(call cc-option-yn, -mtune=i386)
  ifeq ($(HAS_MTUNE),y)

  tune		= $(call cc-option,-mtune=$(1),$(2))

  else

  tune		= $(call cc-option,-mcpu=$(1),$(2))

  endif

  align := $(cc-option-align)
  cflags-$(CONFIG_M386)		+= -march=i386
  cflags-$(CONFIG_M486)		+= -march=i486
  cflags-$(CONFIG_M586)		+= -march=i586
  cflags-$(CONFIG_M586TSC)	+= -march=i586

  cflags-$(CONFIG_M586MMX)	+= -march=pentium-mmx

  cflags-$(CONFIG_M686)		+= -march=i686

  cflags-$(CONFIG_MPENTIUMII)	+= -march=i686 $(call tune,pentium2)
  cflags-$(CONFIG_MPENTIUMIII)	+= -march=i686 $(call tune,pentium3)
  cflags-$(CONFIG_MPENTIUMM)	+= -march=i686 $(call tune,pentium3)
  cflags-$(CONFIG_MPENTIUM4)	+= -march=i686 $(call tune,pentium4)

  cflags-$(CONFIG_MK6)		+= -march=k6
  # Please note, that patches that add -march=athlon-xp and friends are pointless.
  # They make zero difference whatsosever to performance at this time.

  cflags-$(CONFIG_MK7)		+= -march=athlon
  cflags-$(CONFIG_MK8)		+= $(call cc-option,-march=k8,-march=athlon)

  cflags-$(CONFIG_MCRUSOE)	+= -march=i686 $(align)-functions=0 $(align)-jumps=0 $(align)-loops=0

  cflags-$(CONFIG_MEFFICEON)	+= -march=i686 $(call tune,pentium3) $(align)-functions=0 $(align)-jumps=0 $(align)-loops=0

  cflags-$(CONFIG_MWINCHIPC6)	+= $(call cc-option,-march=winchip-c6,-march=i586)

  cflags-$(CONFIG_MWINCHIP3D)	+= $(call cc-option,-march=winchip2,-march=i586)
  cflags-$(CONFIG_MCYRIXIII)	+= $(call cc-option,-march=c3,-march=i486) $(align)-functions=0 $(align)-jumps=0 $(align)-loops=0
  cflags-$(CONFIG_MVIAC3_2)	+= $(call cc-option,-march=c3-2,-march=i686)

  cflags-$(CONFIG_MVIAC7)		+= -march=i686

  cflags-$(CONFIG_MCORE2)		+= -march=i686 $(call tune,core2)

  cflags-$(CONFIG_MATOM)		+= $(call cc-option,-march=atom,$(call cc-option,-march=core2,-march=i686)) \
  	$(call cc-option,-mtune=atom,$(call cc-option,-mtune=generic))

  
  # AMD Elan support

  cflags-$(CONFIG_MELAN)		+= -march=i486

  
  # Geode GX1 support

  cflags-$(CONFIG_MGEODEGX1)	+= -march=pentium-mmx

  cflags-$(CONFIG_MGEODE_LX)	+= $(call cc-option,-march=geode,-march=pentium-mmx)

  # add at the end to overwrite eventual tuning options from earlier
  # cpu entries

  cflags-$(CONFIG_X86_GENERIC) 	+= $(call tune,generic,$(call tune,i686))

  # Work around the pentium-mmx code generator madness of gcc4.4.x which
  # does stack alignment by generating horrible code _before_ the mcount
  # prologue (push %ebp, mov %esp, %ebp) which breaks the function graph

  # tracer assumptions. For i686, generic, core2 this is set by the
  # compiler anyway

  ifeq ($(CONFIG_FUNCTION_GRAPH_TRACER), y)
  ADD_ACCUMULATE_OUTGOING_ARGS := y
  endif
  
  # Work around to a bug with asm goto with first implementations of it
  # in gcc causing gcc to mess up the push and pop of the stack in some
  # uses of asm goto.
  ifeq ($(CONFIG_JUMP_LABEL), y)
  ADD_ACCUMULATE_OUTGOING_ARGS := y
  endif
  
  cflags-$(ADD_ACCUMULATE_OUTGOING_ARGS) += $(call cc-option,-maccumulate-outgoing-args)

  # Bug fix for binutils: this option is required in order to keep
  # binutils from generating NOPL instructions against our will.
  ifneq ($(CONFIG_X86_P6_NOP),y)
  cflags-y			+= $(call cc-option,-Wa$(comma)-mtune=generic32,)
  endif