| Paolo 'Blaisorblade' Giarrusso | 96d55b8 | 2005-10-30 15:00:07 -0800 | [diff] [blame] | 1 | # CPU tuning section - shared with UML. |
| 2 | # Must change only cflags-y (or [yn]), not CFLAGS! That makes a difference for UML. |
| 3 | |
| Andrew Morton | a136564 | 2006-01-08 01:04:09 -0800 | [diff] [blame] | 4 | #-mtune exists since gcc 3.4 |
| Paolo 'Blaisorblade' Giarrusso | d89ea9b | 2005-10-30 15:00:09 -0800 | [diff] [blame] | 5 | HAS_MTUNE := $(call cc-option-yn, -mtune=i386) |
| 6 | ifeq ($(HAS_MTUNE),y) |
| Lasse Collin | b0b1ff6 | 2007-05-02 19:27:06 +0200 | [diff] [blame] | 7 | tune = $(call cc-option,-mtune=$(1),$(2)) |
| Paolo 'Blaisorblade' Giarrusso | d89ea9b | 2005-10-30 15:00:09 -0800 | [diff] [blame] | 8 | else |
| Lasse Collin | b0b1ff6 | 2007-05-02 19:27:06 +0200 | [diff] [blame] | 9 | tune = $(call cc-option,-mcpu=$(1),$(2)) |
| Paolo 'Blaisorblade' Giarrusso | d89ea9b | 2005-10-30 15:00:09 -0800 | [diff] [blame] | 10 | endif |
| 11 | |
| Paolo 'Blaisorblade' Giarrusso | 96d55b8 | 2005-10-30 15:00:07 -0800 | [diff] [blame] | 12 | align := $(cc-option-align) |
| 13 | cflags-$(CONFIG_M386) += -march=i386 |
| 14 | cflags-$(CONFIG_M486) += -march=i486 |
| 15 | cflags-$(CONFIG_M586) += -march=i586 |
| 16 | cflags-$(CONFIG_M586TSC) += -march=i586 |
| Andrew Morton | a136564 | 2006-01-08 01:04:09 -0800 | [diff] [blame] | 17 | cflags-$(CONFIG_M586MMX) += -march=pentium-mmx |
| Paolo 'Blaisorblade' Giarrusso | 96d55b8 | 2005-10-30 15:00:07 -0800 | [diff] [blame] | 18 | cflags-$(CONFIG_M686) += -march=i686 |
| Paolo 'Blaisorblade' Giarrusso | d89ea9b | 2005-10-30 15:00:09 -0800 | [diff] [blame] | 19 | cflags-$(CONFIG_MPENTIUMII) += -march=i686 $(call tune,pentium2) |
| 20 | cflags-$(CONFIG_MPENTIUMIII) += -march=i686 $(call tune,pentium3) |
| 21 | cflags-$(CONFIG_MPENTIUMM) += -march=i686 $(call tune,pentium3) |
| 22 | cflags-$(CONFIG_MPENTIUM4) += -march=i686 $(call tune,pentium4) |
| Paolo 'Blaisorblade' Giarrusso | 96d55b8 | 2005-10-30 15:00:07 -0800 | [diff] [blame] | 23 | cflags-$(CONFIG_MK6) += -march=k6 |
| 24 | # Please note, that patches that add -march=athlon-xp and friends are pointless. |
| 25 | # They make zero difference whatsosever to performance at this time. |
| Andrew Morton | a136564 | 2006-01-08 01:04:09 -0800 | [diff] [blame] | 26 | cflags-$(CONFIG_MK7) += -march=athlon |
| 27 | cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8,-march=athlon) |
| Paolo 'Blaisorblade' Giarrusso | 96d55b8 | 2005-10-30 15:00:07 -0800 | [diff] [blame] | 28 | cflags-$(CONFIG_MCRUSOE) += -march=i686 $(align)-functions=0 $(align)-jumps=0 $(align)-loops=0 |
| Paolo 'Blaisorblade' Giarrusso | d89ea9b | 2005-10-30 15:00:09 -0800 | [diff] [blame] | 29 | cflags-$(CONFIG_MEFFICEON) += -march=i686 $(call tune,pentium3) $(align)-functions=0 $(align)-jumps=0 $(align)-loops=0 |
| Paolo 'Blaisorblade' Giarrusso | 96d55b8 | 2005-10-30 15:00:07 -0800 | [diff] [blame] | 30 | cflags-$(CONFIG_MWINCHIPC6) += $(call cc-option,-march=winchip-c6,-march=i586) |
| Paolo 'Blaisorblade' Giarrusso | 96d55b8 | 2005-10-30 15:00:07 -0800 | [diff] [blame] | 31 | cflags-$(CONFIG_MWINCHIP3D) += $(call cc-option,-march=winchip2,-march=i586) |
| 32 | cflags-$(CONFIG_MCYRIXIII) += $(call cc-option,-march=c3,-march=i486) $(align)-functions=0 $(align)-jumps=0 $(align)-loops=0 |
| 33 | cflags-$(CONFIG_MVIAC3_2) += $(call cc-option,-march=c3-2,-march=i686) |
| Simon Arlott | 0949be3 | 2007-05-02 19:27:05 +0200 | [diff] [blame] | 34 | cflags-$(CONFIG_MVIAC7) += -march=i686 |
| Lasse Collin | b0b1ff6 | 2007-05-02 19:27:06 +0200 | [diff] [blame] | 35 | cflags-$(CONFIG_MCORE2) += -march=i686 $(call tune,core2) |
| Tobias Doerffel | 366d19e | 2009-08-21 23:06:23 +0200 | [diff] [blame] | 36 | cflags-$(CONFIG_MATOM) += $(call cc-option,-march=atom,$(call cc-option,-march=core2,-march=i686)) \ |
| 37 | $(call cc-option,-mtune=atom,$(call cc-option,-mtune=generic)) |
| Paolo 'Blaisorblade' Giarrusso | 96d55b8 | 2005-10-30 15:00:07 -0800 | [diff] [blame] | 38 | |
| 39 | # AMD Elan support |
| 40 | cflags-$(CONFIG_X86_ELAN) += -march=i486 |
| 41 | |
| 42 | # Geode GX1 support |
| Andrew Morton | a136564 | 2006-01-08 01:04:09 -0800 | [diff] [blame] | 43 | cflags-$(CONFIG_MGEODEGX1) += -march=pentium-mmx |
| Matteo Croce | 98059e3 | 2009-10-01 17:11:10 +0200 | [diff] [blame] | 44 | cflags-$(CONFIG_MGEODE_LX) += $(call cc-option,-march=geode,-march=pentium-mmx) |
| Andi Kleen | dca99a3 | 2006-03-25 16:29:06 +0100 | [diff] [blame] | 45 | # add at the end to overwrite eventual tuning options from earlier |
| 46 | # cpu entries |
| Lasse Collin | b0b1ff6 | 2007-05-02 19:27:06 +0200 | [diff] [blame] | 47 | cflags-$(CONFIG_X86_GENERIC) += $(call tune,generic,$(call tune,i686)) |
| Andi Kleen | dca99a3 | 2006-03-25 16:29:06 +0100 | [diff] [blame] | 48 | |
| Thomas Gleixner | 746357d | 2009-11-20 12:01:43 +0100 | [diff] [blame] | 49 | # Work around the pentium-mmx code generator madness of gcc4.4.x which |
| 50 | # does stack alignment by generating horrible code _before_ the mcount |
| 51 | # prologue (push %ebp, mov %esp, %ebp) which breaks the function graph |
| Thomas Gleixner | b8b7d79 | 2009-11-28 15:03:03 +0100 | [diff] [blame] | 52 | # tracer assumptions. For i686, generic, core2 this is set by the |
| 53 | # compiler anyway |
| 54 | cflags-$(CONFIG_FUNCTION_GRAPH_TRACER) += $(call cc-option,-maccumulate-outgoing-args) |
| Thomas Gleixner | 746357d | 2009-11-20 12:01:43 +0100 | [diff] [blame] | 55 | |
| H. Peter Anvin | 28f7e66 | 2008-09-08 12:01:48 -0700 | [diff] [blame] | 56 | # Bug fix for binutils: this option is required in order to keep |
| 57 | # binutils from generating NOPL instructions against our will. |
| 58 | ifneq ($(CONFIG_X86_P6_NOP),y) |
| 59 | cflags-y += $(call cc-option,-Wa$(comma)-mtune=generic32,) |
| 60 | endif |