blob: d16c0d2a3b798168a2931286583aa333e3dea8b4 [file] [log] [blame]
# Copyright 2014 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
# These are primarily relevant in current_cpu == "arm" contexts, where
# ARM code is being compiled. But they can also be relevant in the
# host toolchain context when target_cpu == "arm", where a host-side
# build tool being built will change its behavior depending on the
# details of the target configuration.
if (target_cpu == "arm" || current_cpu == "arm") {
declare_args() {
# Version of the ARM processor when compiling on ARM. Ignored on non-ARM
# platforms.
arm_version = 7
# The ARM floating point mode. This is either the string "hard", "soft", or
# "softfp". An empty string means to use the default one for the
# arm_version.
arm_float_abi = ""
# The ARM variant-specific tuning mode. This will be a string like "armv6"
# or "cortex-a15". An empty string means to use the default for the
# arm_version.
arm_tune = ""
# Whether to use the neon FPU instruction set or not.
arm_use_neon = true
# Whether to enable optional NEON code paths.
arm_optionally_use_neon = false
# Thumb is a reduced instruction set available on some ARM processors that
# has increased code density.
arm_use_thumb = true
}
assert(arm_float_abi == "" || arm_float_abi == "hard" ||
arm_float_abi == "soft" || arm_float_abi == "softfp")
if (arm_version == 6) {
arm_arch = "armv6"
if (arm_tune != "") {
arm_tune = ""
}
if (arm_float_abi == "") {
arm_float_abi = "softfp"
}
arm_fpu = "vfp"
arm_use_thumb = false
} else if (arm_version == 7) {
arm_arch = "armv7-a"
if (arm_tune == "") {
arm_tune = "generic-armv7-a"
}
if (arm_float_abi == "") {
if (current_os == "android" || target_os == "android") {
arm_float_abi = "softfp"
} else {
arm_float_abi = "hard"
}
}
if (arm_use_neon) {
arm_fpu = "neon"
} else {
arm_fpu = "vfpv3-d16"
}
} else if (arm_version == 8) {
arm_arch = "armv8-a"
if (arm_tune == "") {
arm_tune = "generic-armv8-a"
}
if (arm_float_abi == "") {
if (current_os == "android" || target_os == "android") {
arm_float_abi = "softfp"
} else {
arm_float_abi = "hard"
}
}
if (arm_use_neon) {
arm_fpu = "neon"
} else {
arm_fpu = "vfpv3-d16"
}
}
} else if (current_cpu == "arm64" || target_cpu == "arm64") {
# arm64 supports only "hard".
arm_float_abi = "hard"
arm_use_neon = true
}