nds32: nds32 FPU port
This patch set contains basic components for supporting the nds32 FPU,
such as exception handlers and context switch for FPU registers. By
default, the lazy FPU scheme is supported and the user can configure it via
CONFIG_LZAY_FPU.
Signed-off-by: Vincent Chen <vincentc@andestech.com>
Acked-by: Greentime Hu <greentime@andestech.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>
diff --git a/arch/nds32/Makefile b/arch/nds32/Makefile
index 9f525ed..6dc0320 100644
--- a/arch/nds32/Makefile
+++ b/arch/nds32/Makefile
@@ -5,10 +5,14 @@
comma = ,
+
ifdef CONFIG_FUNCTION_TRACER
arch-y += -malways-save-lp -mno-relax
endif
+# Avoid generating FPU instructions
+arch-y += -mno-ext-fpu-sp -mno-ext-fpu-dp -mfloat-abi=soft
+
KBUILD_CFLAGS += $(call cc-option, -mno-sched-prolog-epilog)
KBUILD_CFLAGS += -mcmodel=large