| # 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. |
| |
| if (cpu_arch == "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 = "" |
| } |
| |
| assert(arm_float_abi == "" || |
| arm_float_abi == "hard" || |
| arm_float_abi == "soft" || |
| arm_float_abi == "softfp") |
| |
| if (is_android) { |
| arm_use_neon = false |
| # Our version of arm_neon_optional from common.gypi. This is not used in the |
| # current build so is commented out for now. |
| #arm_optionally_use_neon = false |
| } else { |
| arm_use_neon = true |
| #arm_optionally_use_neon = true |
| } |
| |
| if (arm_version == 6) { |
| arm_arch = "armv6" |
| arm_tune = "" |
| if (arm_float_abi == "") { |
| arm_float_abi = "softfp" |
| } |
| arm_fpu = "vfp" |
| # Thumb is a reduced instruction set available on some ARM processors that |
| # has increased code density. |
| arm_use_thumb = false |
| |
| } else if (arm_version == 7) { |
| arm_arch = "armv7-a" |
| arm_tune = "" |
| if (arm_float_abi == "") { |
| arm_float_abi = "softfp" |
| } |
| arm_use_thumb = true |
| |
| if (arm_use_neon) { |
| arm_fpu = "neon" |
| } else { |
| arm_fpu = "vfpv3-d16" |
| } |
| } |
| } |
