diff options
| author | Thomas Petazzoni <thomas.petazzoni@free-electrons.com> | 2016-11-30 22:12:08 +0100 |
|---|---|---|
| committer | Thomas Petazzoni <thomas.petazzoni@free-electrons.com> | 2016-12-05 23:07:10 +0100 |
| commit | d690b7444a819a53a756cd3b6047584802d55d92 (patch) | |
| tree | e4f7ba4fc4e7818f131444d982d7af7eb0e337f3 /arch | |
| parent | 743e6639123890f6cbcecdc8d4b935e82a548aca (diff) | |
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 <thomas.petazzoni@free-electrons.com>
[yann.morin.1998@free.fr: drop the FP strategy dependency]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/Config.in.arm | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/arch/Config.in.arm b/arch/Config.in.arm index fa999d5ec..1a3c36d5c 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 |