| # Copyright 2019 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. |
| |
| declare_args() { |
| # Version of the ARM processor when compiling on ARM. Ignored on non-ARM |
| # platforms. |
| arm_version = 7 |
| |
| # The ARM architecture. This will be a string like "armv6" or "armv7-a". |
| # An empty string means to use the default for the arm_version. Getting |
| # a proper list of supported architectures is challenging for clang, but |
| # can be found in the triple.h header in the LLVM source, under the |
| # SubArchType enum. |
| arm_arch = "armv7-a" |
| |
| # The ARM floating point hardware. This will be a string like "neon" or |
| # "vfpv3". |
| arm_fpu = "vfpv3-d16" |
| |
| # The ARM floating point mode. This is either the string "hard", "soft", or |
| # "softfp". |
| arm_float_abi = "hard" |
| |
| # The ARM variant-specific tuning mode. This will be a string like "armv6" |
| # or "cortex-a15". Each cpu-type has a different tuning value. |
| arm_tune = "generic-armv7-a" |
| } |
| |
| declare_args() { |
| # Whether to use the neon FPU instruction set or not. Actual value is set |
| # below, based on the arm_fpu argument. |
| arm_use_neon = arm_fpu == "neon" |
| } |
| |
| if (current_cpu == "arm64") { |
| # arm64 supports only "hard". |
| arm_float_abi = "hard" |
| arm_fpu = "neon" |
| arm_use_neon = true |
| } |
| |
| assert(arm_float_abi == "hard" || arm_float_abi == "soft" || |
| arm_float_abi == "softfp") |
| assert(arm_version == 6 || arm_version == 7 || arm_version == 8) |