15d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)# Copyright 2014 The Chromium Authors. All rights reserved. 25d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)# Use of this source code is governed by a BSD-style license that can be 35d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)# found in the LICENSE file. 45d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 5a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)if (cpu_arch == "arm") { 6a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) declare_args() { 7a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) # Version of the ARM processor when compiling on ARM. Ignored on non-ARM 8a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) # platforms. 9a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) arm_version = 7 105d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 11a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) # The ARM floating point mode. This is either the string "hard", "soft", or 12a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) # "softfp". An empty string means to use the default one for the 13a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) # arm_version. 14a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) arm_float_abi = "" 151320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci 161320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci # The ARM variant-specific tuning mode. This will be a string like "armv6" 171320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci # or "cortex-a15". An empty string means to use the default for the 181320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci # arm_version. 191320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci arm_tune = "" 201320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci 211320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci # Whether to use the neon FPU instruction set or not. 221320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci arm_use_neon = true 23a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) } 245d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 25a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) assert(arm_float_abi == "" || 26a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) arm_float_abi == "hard" || 27a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) arm_float_abi == "soft" || 28a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) arm_float_abi == "softfp") 295d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 30a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) if (is_android) { 31a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) arm_use_neon = false 325d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) } 331320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci arm_optionally_use_neon = true 345d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 35a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) if (arm_version == 6) { 36a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) arm_arch = "armv6" 371320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci if (arm_tune != "") { 381320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci arm_tune = "" 391320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci } 40a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) if (arm_float_abi == "") { 41a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) arm_float_abi = "softfp" 42a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) } 43a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) arm_fpu = "vfp" 44a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) # Thumb is a reduced instruction set available on some ARM processors that 45a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) # has increased code density. 46a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) arm_use_thumb = false 475d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 48a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) } else if (arm_version == 7) { 49a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) arm_arch = "armv7-a" 501320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci if (arm_tune == "") { 511320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci arm_tune = "generic-armv7-a" 521320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci } 531320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci 54a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) if (arm_float_abi == "") { 55a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) arm_float_abi = "softfp" 56a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) } 571320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci 58a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) arm_use_thumb = true 59a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 60a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) if (arm_use_neon) { 61a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) arm_fpu = "neon" 62a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) } else { 63a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) arm_fpu = "vfpv3-d16" 64a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) } 655d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) } 665d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)} 67