MIPS: Loongson-3: Improve -march option and move it to Platform

[mirror_ubuntu-zesty-kernel.git] / arch / mips / Makefile

diff --git a/arch/mips/Makefile b/arch/mips/Makefile
index 252e347958f383354a597323078512846f592d52..e78d60dbdffdad93994421e684a87e2f34f8b802 100644 (file)
--- a/arch/mips/Makefile
+++ b/arch/mips/Makefile
@@ -166,16 +166,6 @@ cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += -Wa,-march=octeon
 endif
 cflags-$(CONFIG_CAVIUM_CN63XXP1) += -Wa,-mfix-cn63xxp1
 cflags-$(CONFIG_CPU_BMIPS)     += -march=mips32 -Wa,-mips32 -Wa,--trap
-#
-# binutils from v2.25 on and gcc starting from v4.9.0 treat -march=loongson3a
-# as MIPS64 R1; older versions as just R1.  This leaves the possibility open
-# that GCC might generate R2 code for -march=loongson3a which then is rejected
-# by GAS.  The cc-option can't probe for this behaviour so -march=loongson3a
-# can't easily be used safely within the kbuild framework.
-#
-cflags-$(CONFIG_CPU_LOONGSON3)  +=                                     \
-       $(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \
-       -Wa,-mips64r2 -Wa,--trap
 
 cflags-$(CONFIG_CPU_R4000_WORKAROUNDS) += $(call cc-option,-mfix-r4000,)
 cflags-$(CONFIG_CPU_R4400_WORKAROUNDS) += $(call cc-option,-mfix-r4400,)
@@ -204,6 +194,10 @@ toolchain-msa                              := $(call cc-option-yn,$(mips-cflags) -mhard-float -mfp64 -Wa$(
 cflags-$(toolchain-msa)                        += -DTOOLCHAIN_SUPPORTS_MSA
 endif
 
+cflags-$(CONFIG_MIPS_COMPACT_BRANCHES_NEVER)   += -mcompact-branches=never
+cflags-$(CONFIG_MIPS_COMPACT_BRANCHES_OPTIMAL) += -mcompact-branches=optimal
+cflags-$(CONFIG_MIPS_COMPACT_BRANCHES_ALWAYS)  += -mcompact-branches=always
+
 #
 # Firmware support
 #