MIPS[64]: Add support for big endian build using GN

BUILD.gn

 # 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.
 
 import("//build/config/android/config.gni")
 import("//build/config/arm.gni")
 import("//build/config/dcheck_always_on.gni")
 import("//build/config/host_byteorder.gni")
 import("//build/config/mips.gni")
 import("//build/config/sanitizers/sanitizers.gni")
@@ skipping 309 matching lines @@
   if (v8_current_cpu == "arm64") {
     defines += [ "V8_TARGET_ARCH_ARM64" ]
   }
 
   # Mips64el/mipsel simulators.
   if (is_target_simulator &&
       (v8_current_cpu == "mipsel" || v8_current_cpu == "mips64el")) {
     defines += [ "_MIPS_TARGET_SIMULATOR" ]
   }
 
-  # TODO(jochen): Add support for mips.
-  if (v8_current_cpu == "mipsel") {
+  if (v8_current_cpu == "mipsel" || v8_current_cpu == "mips") {
     defines += [ "V8_TARGET_ARCH_MIPS" ]
     if (v8_can_use_fpu_instructions) {
       defines += [ "CAN_USE_FPU_INSTRUCTIONS" ]
     }
     if (v8_use_mips_abi_hardfloat) {
       defines += [
         "__mips_hard_float=1",
         "CAN_USE_FPU_INSTRUCTIONS",
       ]
     } else {
@@ skipping 13 matching lines @@
       } else if (mips_fpu_mode == "fp32") {
         defines += [ "FPU_MODE_FP32" ]
       }
     } else if (mips_arch_variant == "r1") {
       defines += [ "FPU_MODE_FP32" ]
     }
 
     # TODO(jochen): Add support for mips_arch_variant rx and loongson.
   }
 
-  # TODO(jochen): Add support for mips64.
-  if (v8_current_cpu == "mips64el") {
+  if (v8_current_cpu == "mips64el" || v8_current_cpu == "mips64") {
     defines += [ "V8_TARGET_ARCH_MIPS64" ]
     if (v8_can_use_fpu_instructions) {
       defines += [ "CAN_USE_FPU_INSTRUCTIONS" ]
     }
 
-    # TODO(jochen): Add support for big endian host byteorder.
-    defines += [ "V8_TARGET_ARCH_MIPS64_LE" ]
+    if (host_byteorder == "little") {
+      defines += [ "V8_TARGET_ARCH_MIPS64_LE" ]
+    } else if (host_byteorder == "big") {
+      defines += [ "V8_TARGET_ARCH_MIPS64_BE" ]
+    }
     if (v8_use_mips_abi_hardfloat) {
       defines += [
         "__mips_hard_float=1",
         "CAN_USE_FPU_INSTRUCTIONS",
       ]
     } else {
       defines += [ "__mips_soft_float=1" ]
     }
     if (mips_arch_variant == "r6") {
       defines += [ "_MIPS_ARCH_MIPS64R6" ]
@@ skipping 2930 matching lines @@
   ]
 
   configs = [
     ":external_config",
     ":internal_config_base",
   ]
 }
 
 v8_fuzzer("wasm_compile_fuzzer") {
 }