Home | History | Annotate | Download | only in config 
      1 # Copyright 2014 The Chromium Authors. All rights reserved.
      2 # Use of this source code is governed by a BSD-style license that can be
      3 # found in the LICENSE file.
      4 
      5 if (cpu_arch == "arm") {
      6   declare_args() {
      7     # Version of the ARM processor when compiling on ARM. Ignored on non-ARM
      8     # platforms.
      9     arm_version = 7
     10 
     11     # The ARM floating point mode. This is either the string "hard", "soft", or
     12     # "softfp". An empty string means to use the default one for the
     13     # arm_version.
     14     arm_float_abi = ""
     15   }
     16 
     17   assert(arm_float_abi == "" ||
     18          arm_float_abi == "hard" ||
     19          arm_float_abi == "soft" ||
     20          arm_float_abi == "softfp")
     21 
     22   if (is_android) {
     23     arm_use_neon = false
     24     arm_optionally_use_neon = false
     25   } else {
     26     arm_use_neon = true
     27     arm_optionally_use_neon = true
     28   }
     29 
     30   if (arm_version == 6) {
     31     arm_arch = "armv6"
     32     arm_tune = ""
     33     if (arm_float_abi == "") {
     34       arm_float_abi = "softfp"
     35     }
     36     arm_fpu = "vfp"
     37     # Thumb is a reduced instruction set available on some ARM processors that
     38     # has increased code density.
     39     arm_use_thumb = false
     40 
     41   } else if (arm_version == 7) {
     42     arm_arch = "armv7-a"
     43     arm_tune = "generic-armv7-a"
     44     if (arm_float_abi == "") {
     45       arm_float_abi = "softfp"
     46     }
     47     arm_use_thumb = true
     48 
     49     if (arm_use_neon) {
     50       arm_fpu = "neon"
     51     } else {
     52       arm_fpu = "vfpv3-d16"
     53     }
     54   }
     55 }
     56