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308-mips32r2_tune.patch

308-mips32r2_tune.patch 1.1 KB
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  1. From: Felix Fietkau <nbd@nbd.name>
    2. 

  2. Subject: kernel: add -mtune=34kc to MIPS CFLAGS when building for mips32r2
    3. 

  3. 

  4. This provides a good tradeoff across at least 24Kc-74Kc, while also
    5. 

  5. producing smaller code.
    6. 

  6. 

  7. Signed-off-by: Felix Fietkau <nbd@nbd.name>
    8. 

  8. ---
    9. 

  9.  arch/mips/Makefile | 2 +-
    10. 

  10.  1 file changed, 1 insertion(+), 1 deletion(-)
    11. 

  11. 

  12. --- a/arch/mips/Makefile
    13. 

  13. +++ b/arch/mips/Makefile
    14. 

  14. @@ -153,7 +153,7 @@ cflags-$(CONFIG_CPU_R4X00)	+= -march=r46
    15. 

  15.  cflags-$(CONFIG_CPU_TX49XX)	+= -march=r4600 -Wa,--trap
    16. 

  16.  cflags-$(CONFIG_CPU_MIPS32_R1)	+= $(call cc-option,-march=mips32,-mips32 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \
    17. 

  17.  			-Wa,-mips32 -Wa,--trap
    18. 

  18. -cflags-$(CONFIG_CPU_MIPS32_R2)	+= $(call cc-option,-march=mips32r2,-mips32r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \
    19. 

  19. +cflags-$(CONFIG_CPU_MIPS32_R2)	+= $(call cc-option,-march=mips32r2 -mtune=34kc,-mips32r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \
    20. 

  20.  			-Wa,-mips32r2 -Wa,--trap
    21. 

  21.  cflags-$(CONFIG_CPU_MIPS32_R6)	+= -march=mips32r6 -Wa,--trap
    22. 

  22.  cflags-$(CONFIG_CPU_MIPS64_R1)	+= $(call cc-option,-march=mips64,-mips64 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \
    23.