Makefile_32.cpu 2.5 KB

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  1. # SPDX-License-Identifier: GPL-2.0
  2. # CPU tuning section - shared with UML.
  3. # Must change only cflags-y (or [yn]), not CFLAGS! That makes a difference for UML.
  4. #-mtune exists since gcc 3.4
  5. HAS_MTUNE := $(call cc-option-yn, -mtune=i386)
  6. ifeq ($(HAS_MTUNE),y)
  7. tune = $(call cc-option,-mtune=$(1),$(2))
  8. else
  9. tune = $(call cc-option,-mcpu=$(1),$(2))
  10. endif
  11. cflags-$(CONFIG_M486SX) += -march=i486
  12. cflags-$(CONFIG_M486) += -march=i486
  13. cflags-$(CONFIG_M586) += -march=i586
  14. cflags-$(CONFIG_M586TSC) += -march=i586
  15. cflags-$(CONFIG_M586MMX) += -march=pentium-mmx
  16. cflags-$(CONFIG_M686) += -march=i686
  17. cflags-$(CONFIG_MPENTIUMII) += -march=i686 $(call tune,pentium2)
  18. cflags-$(CONFIG_MPENTIUMIII) += -march=i686 $(call tune,pentium3)
  19. cflags-$(CONFIG_MPENTIUMM) += -march=i686 $(call tune,pentium3)
  20. cflags-$(CONFIG_MPENTIUM4) += -march=i686 $(call tune,pentium4)
  21. cflags-$(CONFIG_MK6) += -march=k6
  22. # Please note, that patches that add -march=athlon-xp and friends are pointless.
  23. # They make zero difference whatsosever to performance at this time.
  24. cflags-$(CONFIG_MK7) += -march=athlon
  25. cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8,-march=athlon)
  26. cflags-$(CONFIG_MCRUSOE) += -march=i686 -falign-functions=0 -falign-jumps=0 -falign-loops=0
  27. cflags-$(CONFIG_MEFFICEON) += -march=i686 $(call tune,pentium3) -falign-functions=0 -falign-jumps=0 -falign-loops=0
  28. cflags-$(CONFIG_MWINCHIPC6) += $(call cc-option,-march=winchip-c6,-march=i586)
  29. cflags-$(CONFIG_MWINCHIP3D) += $(call cc-option,-march=winchip2,-march=i586)
  30. cflags-$(CONFIG_MCYRIXIII) += $(call cc-option,-march=c3,-march=i486) -falign-functions=0 -falign-jumps=0 -falign-loops=0
  31. cflags-$(CONFIG_MVIAC3_2) += $(call cc-option,-march=c3-2,-march=i686)
  32. cflags-$(CONFIG_MVIAC7) += -march=i686
  33. cflags-$(CONFIG_MCORE2) += -march=i686 $(call tune,core2)
  34. cflags-$(CONFIG_MATOM) += $(call cc-option,-march=atom,$(call cc-option,-march=core2,-march=i686)) \
  35. $(call cc-option,-mtune=atom,$(call cc-option,-mtune=generic))
  36. # AMD Elan support
  37. cflags-$(CONFIG_MELAN) += -march=i486
  38. # Geode GX1 support
  39. cflags-$(CONFIG_MGEODEGX1) += -march=pentium-mmx
  40. cflags-$(CONFIG_MGEODE_LX) += $(call cc-option,-march=geode,-march=pentium-mmx)
  41. # add at the end to overwrite eventual tuning options from earlier
  42. # cpu entries
  43. cflags-$(CONFIG_X86_GENERIC) += $(call tune,generic,$(call tune,i686))
  44. # Bug fix for binutils: this option is required in order to keep
  45. # binutils from generating NOPL instructions against our will.
  46. ifneq ($(CONFIG_X86_P6_NOP),y)
  47. cflags-y += $(call cc-option,-Wa$(comma)-mtune=generic32,)
  48. endif