Re: [Minios-devel] [UNIKRAFT PATCHv5 08/46] arch/arm64: Add processor optimization GCC flags for arm64

[Simon Kuenzer <simon.kuenzer@xxxxxxxxx>]

Reviewed-by: Simon Kuenzer <simon.kuenzer@xxxxxxxxx>

On 10.08.2018 09:07, Wei Chen wrote:
> From: Wei Chen <Wei.Chen@xxxxxxx>
>
> We added several Arm64 CPU models in support list. In this patch,
> we check the GCC version and add optimization GCC flags for
> selected processor.
>
> Current supported Arm64 CPU models:
> native, generic, cortex-a53, cortex-a57, cortex-a72, cortex-a73,
> cortex-a55 and cortex-a75.
>
> Signed-off-by: Wei Chen <Wei.Chen@xxxxxxx>
> ---
>   arch/arm/arm64/Compiler.uk |  6 ++++
>   arch/arm/arm64/Makefile.uk | 59 ++++++++++++++++++++++++++++++++++++++
>   2 files changed, 65 insertions(+)
>   create mode 100644 arch/arm/arm64/Compiler.uk
>   create mode 100644 arch/arm/arm64/Makefile.uk
>
> diff --git a/arch/arm/arm64/Compiler.uk b/arch/arm/arm64/Compiler.uk
> new file mode 100644
> index 0000000..4572013
> --- /dev/null
> +++ b/arch/arm/arm64/Compiler.uk
> @@ -0,0 +1,6 @@
> +# set cross compile
> +ifeq ($(CONFIG_CROSS_COMPILE),)
> +ifneq ($(CONFIG_UK_ARCH),$(HOSTARCH))
> +       CONFIG_CROSS_COMPILE := aarch64-linux-gnu-
> +endif
> +endif
> diff --git a/arch/arm/arm64/Makefile.uk b/arch/arm/arm64/Makefile.uk
> new file mode 100644
> index 0000000..d4ba7e3
> --- /dev/null
> +++ b/arch/arm/arm64/Makefile.uk
> @@ -0,0 +1,59 @@
> +ASFLAGS  += -D__ARM_64__
> +CFLAGS   += -D__ARM_64__ -fms-extensions
> +CXXFLAGS += -D__ARM_64__ -fms-extensions
> +
> +# GCC support -mcpu=native for arm64 from 6.0
> +ifeq ($(CONFIG_MARCH_ARM64_NATIVE),y)
> +$(call error_if_gcc_version_lt,6,0)
> +CFLAGS-$(call gcc_version_ge,6,0)      += -mcpu=native
> +CXXFLAGS-$(call gcc_version_ge,6,0)    += -mcpu=native
> +endif
> +
> +# GCC support -mcpu=generic for arm64 from 4.8
> +ifeq ($(CONFIG_MARCH_ARM64_GENERIC),y)
> +$(call error_if_gcc_version_lt,4,8)
> +CFLAGS-$(call gcc_version_ge,4,8)      += -march=armv8-a -mcpu=generic 
> -mtune=generic
> +CXXFLAGS-$(call gcc_version_ge,4,8)    += -march=armv8-a -mcpu=generic 
> -mtune=generic
> +endif
> +
> +# GCC support -mcpu=cortex-a53 for arm64 from 4.9
> +ifeq ($(CONFIG_MARCH_ARM64_CORTEXA53),y)
> +$(call error_if_gcc_version_lt,4,9)
> +CFLAGS-$(call gcc_version_ge,4,9)      += -march=armv8-a -mcpu=cortex-a53 
> -mtune=cortex-a53
> +CXXFLAGS-$(call gcc_version_ge,4,9)    += -march=armv8-a -mcpu=cortex-a53 
> -mtune=cortex-a53
> +endif
> +
> +# GCC support -mcpu=cortex-a57 for arm64 from 4.9
> +ifeq ($(CONFIG_MARCH_ARM64_CORTEXA57),y)
> +$(call error_if_gcc_version_lt,4,9)
> +CFLAGS-$(call gcc_version_ge,4,9)      += -march=armv8-a -mcpu=cortex-a57 
> -mtune=cortex-a57
> +CXXFLAGS-$(call gcc_version_ge,4,9)    += -march=armv8-a -mcpu=cortex-a57 
> -mtune=cortex-a57
> +endif
> +
> +# GCC support -mcpu=cortex-a72 for arm64 from 5.0
> +ifeq ($(CONFIG_MARCH_ARM64_CORTEXA72),y)
> +$(call error_if_gcc_version_lt,5,0)
> +CFLAGS-$(call gcc_version_ge,5,0)      += -march=armv8-a -mcpu=cortex-a72 
> -mtune=cortex-a72
> +CXXFLAGS-$(call gcc_version_ge,5,0)    += -march=armv8-a -mcpu=cortex-a72 
> -mtune=cortex-a72
> +endif
> +
> +# GCC support -mcpu=cortex-a73 for arm64 from 7.0
> +ifeq ($(CONFIG_MARCH_ARM64_CORTEXA73),y)
> +$(call error_if_gcc_version_lt,7,0)
> +CFLAGS-$(call gcc_version_ge,7,0)      += -march=armv8-a -mcpu=cortex-a73 
> -mtune=cortex-a73
> +CXXFLAGS-$(call gcc_version_ge,7,0)    += -march=armv8-a -mcpu=cortex-a73 
> -mtune=cortex-a73
> +endif
> +
> +# GCC support -mcpu=cortex-a55 for arm64 from 8.0
> +ifeq ($(CONFIG_MARCH_ARM64_CORTEXA55),y)
> +$(call error_if_gcc_version_lt,8,0)
> +CFLAGS-$(call gcc_version_ge,8,0)      += -march=armv8.2-a -mcpu=cortex-a55 
> -mtune=cortex-a55
> +CXXFLAGS-$(call gcc_version_ge,8,0)    += -march=armv8.2-a -mcpu=cortex-a55 
> -mtune=cortex-a55
> +endif
> +
> +# GCC support -mcpu=cortex-a75 for arm64 from 8.0
> +ifeq ($(CONFIG_MARCH_ARM64_CORTEXA75),y)
> +$(call error_if_gcc_version_lt,8,0)
> +CFLAGS-$(call gcc_version_ge,8,0)      += -march=armv8.2-a -mcpu=cortex-a75 
> -mtune=cortex-a75
> +CXXFLAGS-$(call gcc_version_ge,8,0)    += -march=armv8.2-a -mcpu=cortex-a75 
> -mtune=cortex-a75
> +endif
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