From: Thomas Petazzoni Date: Wed, 30 Nov 2016 21:12:08 +0000 (+0100) Subject: arch/Config.in.arm: add FPU related options for ARMv8 cores X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=d690b7444a819a53a756cd3b6047584802d55d92;p=buildroot.git arch/Config.in.arm: add FPU related options for ARMv8 cores The ARMv8 cores have a mandatory FPU unit called FP-ARMv8, so we: - add a new hidden Config.in option for the availability of this unit (BR2_ARM_CPU_HAS_FP_ARMV8) - allow the selection of a possible choice in the "Floating point strategy", and add two new choices: BR2_ARM_FPU_FP_ARMV8 and BR2_ARM_FPU_NEON_FP_ARMV8. - specify the -mfpu values for BR2_ARM_FPU_FP_ARMV8 and BR2_ARM_FPU_NEON_FP_ARMV8 cases, when used on ARM 32 bits (-mfpu doesn't exist on ARM64, instead -mcpu modifiers are used, so they will be added on a per-core basis). Signed-off-by: Thomas Petazzoni [yann.morin.1998@free.fr: drop the FP strategy dependency] Signed-off-by: Yann E. MORIN Signed-off-by: Thomas Petazzoni --- diff --git a/arch/Config.in.arm b/arch/Config.in.arm index fa999d5ec4..1a3c36d5c5 100644 --- a/arch/Config.in.arm +++ b/arch/Config.in.arm @@ -31,6 +31,10 @@ config BR2_ARM_CPU_HAS_VFPV4 bool select BR2_ARM_CPU_HAS_VFPV3 +config BR2_ARM_CPU_HAS_FP_ARMV8 + bool + select BR2_ARM_CPU_HAS_VFPV4 + config BR2_ARM_CPU_HAS_ARM bool @@ -308,6 +312,7 @@ endchoice choice prompt "Floating point strategy" + default BR2_ARM_FPU_FP_ARMV8 if BR2_ARM_CPU_HAS_FP_ARMV8 default BR2_ARM_FPU_VFPV4D16 if BR2_ARM_CPU_HAS_VFPV4 default BR2_ARM_FPU_VFPV3D16 if BR2_ARM_CPU_HAS_VFPV3 default BR2_ARM_FPU_VFPV2 if BR2_ARM_CPU_HAS_VFPV2 @@ -418,6 +423,20 @@ config BR2_ARM_FPU_NEON_VFPV4 example on Cortex-A5 and Cortex-A7, support for VFPv4 and NEON is optional. +config BR2_ARM_FPU_FP_ARMV8 + bool "FP-ARMv8" + depends on BR2_ARM_CPU_HAS_FP_ARMV8 + help + This option allows to use the ARMv8 floating point unit. + +config BR2_ARM_FPU_NEON_FP_ARMV8 + bool "NEON/FP-ARMv8" + depends on BR2_ARM_CPU_HAS_FP_ARMV8 + depends on BR2_ARM_CPU_HAS_NEON + help + This option allows to use both the ARMv8 floating point unit + and the NEON SIMD unit for floating point operations. + endchoice choice @@ -504,6 +523,8 @@ config BR2_GCC_TARGET_FPU default "vfpv4-d16" if BR2_ARM_FPU_VFPV4D16 default "neon" if BR2_ARM_FPU_NEON default "neon-vfpv4" if BR2_ARM_FPU_NEON_VFPV4 + default "fp-armv8" if BR2_ARM_FPU_FP_ARMV8 + default "neon-fp-armv8" if BR2_ARM_FPU_NEON_FP_ARMV8 config BR2_GCC_TARGET_FLOAT_ABI default "soft" if BR2_ARM_SOFT_FLOAT