[Minios-devel] [UNIKRAFT RFC PATCH 3/5] arch/arm64: Don't pass -mgeneral-regs-only when CONFIG_FLOAT_POINT is y

[Jia He <justin.he@xxxxxxx>]

Support CONFIG_FLOAT_POINT in Unikraft app will take some overhead during
context switch. Hence still use -mgeneral-regs-only when
CONFIG_FLOAT_POINT is 'n'

Signed-off-by: Jia He <justin.he@xxxxxxx>
---
 arch/arm/arm64/Makefile.uk | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/arm/arm64/Makefile.uk b/arch/arm/arm64/Makefile.uk
index eb73cac..b2c093c 100644
--- a/arch/arm/arm64/Makefile.uk
+++ b/arch/arm/arm64/Makefile.uk
@@ -3,9 +3,15 @@
 # we should not enable the FP & SIMD access for kernel. As GCC will
 # the FP & SIMD registers to pass parameters, we use -mgeneral-regs-only
 # flag to force GCC to use generic registers
+ifeq ($(CONFIG_FLOAT_POINT),y)
+ASFLAGS  += -D__ARM_64__
+CFLAGS   += -D__ARM_64__ -fms-extensions
+CXXFLAGS += -D__ARM_64__ -fms-extensions
+else
 ASFLAGS  += -D__ARM_64__ -mgeneral-regs-only
 CFLAGS   += -D__ARM_64__ -fms-extensions -mgeneral-regs-only
 CXXFLAGS += -D__ARM_64__ -fms-extensions -mgeneral-regs-only
+endif
 
 CINCLUDES   += -I$(CONFIG_UK_BASE)/arch/arm/arm64/include
 ASINCLUDES  += -I$(CONFIG_UK_BASE)/arch/arm/arm64/include
-- 
2.17.1


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