Add MIPS SIMD Arch (MSA) build flags for GYP/GN builds

build/common.gypi

 # Copyright (c) 2012 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.
 
 # IMPORTANT:
 # Please don't directly include this file if you are building via gyp_chromium,
 # since gyp_chromium is automatically forcing its inclusion.
 {
   # Variables expected to be overriden on the GYP command line (-D) or by
   # ~/.gyp/include.gypi.
@@ skipping 199 matching lines @@
         # Default MIPS arch variant. This is set in the conditions block
         # below for MIPS targets.
         'mips_arch_variant%': '',
 
         # MIPS DSP ASE revision. Possible values are:
         #   0: unavailable
         #   1: revision 1
         #   2: revision 2
         'mips_dsp_rev%': 0,
 
+        # MIPS SIMD Arch compilation flag.
+        'mips_msa%': 1,
+
         'conditions': [
           ['branding == "Chrome"', {
             'branding_path_component%': 'google_chrome',
           }],
 
           ['branding == "Chromium"', {
             'branding_path_component%': 'chromium',
           }],
 
           # Ash needs Aura.
@@ skipping 103 matching lines @@
 
       # Copy conditionally-set variables out one scope.
       'chromeos%': '<(chromeos)',
       'chromecast%': '<(chromecast)',
       'is_cast_desktop_build%': '<(is_cast_desktop_build)',
       'host_arch%': '<(host_arch)',
       'target_arch%': '<(target_arch)',
       'target_subarch%': '<(target_subarch)',
       'mips_arch_variant%': '<(mips_arch_variant)',
       'mips_dsp_rev%': '<(mips_dsp_rev)',
+      'mips_msa%': '<(mips_msa)',
       'toolkit_views%': '<(toolkit_views)',
       'desktop_linux%': '<(desktop_linux)',
       'use_aura%': '<(use_aura)',
       'use_ash%': '<(use_ash)',
       'use_cras%': '<(use_cras)',
       'use_libpci%': '<(use_libpci)',
       'use_ozone%': '<(use_ozone)',
       'use_ozone_evdev%': '<(use_ozone_evdev)',
       'use_clipboard_aurax11%': '<(use_clipboard_aurax11)',
       'embedded%': '<(embedded)',
@@ skipping 760 matching lines @@
     },
 
     # Copy conditionally-set variables out one scope.
     'branding%': '<(branding)',
     'branding_path_component%': '<(branding_path_component)',
     'buildtype%': '<(buildtype)',
     'target_arch%': '<(target_arch)',
     'target_subarch%': '<(target_subarch)',
     'mips_arch_variant%': '<(mips_arch_variant)',
     'mips_dsp_rev%': '<(mips_dsp_rev)',
+    'mips_msa%': '<(mips_msa)',
     'host_arch%': '<(host_arch)',
     'toolkit_views%': '<(toolkit_views)',
     'ui_compositor_image_transport%': '<(ui_compositor_image_transport)',
     'use_aura%': '<(use_aura)',
     'use_ash%': '<(use_ash)',
     'use_cras%': '<(use_cras)',
     'use_libpci%': '<(use_libpci)',
     'use_openssl_certs%': '<(use_openssl_certs)',
     'use_external_popup_menu%': '<(use_external_popup_menu)',
     'use_nss_certs%': '<(use_nss_certs)',
@@ skipping 2991 matching lines @@
                             'cflags': [ '-target mipsel-linux-android', '-march=mipsel', '-mcpu=mips32r6', ],
                             'ldflags': [ '-target mipsel-linux-android', ],
                           }],
                         ],
                       }, { # clang==0
                         'cflags': ['-mips32r6', '-Wa,-mips32r6', ],
                       }],
                       ['clang==0 and OS=="android"', {
                         'ldflags': ['-mips32r6', '-Wl,-melf32ltsmip',],
                       }],
+                      ['mips_msa==1', {
+                        'cflags': ['-mmsa', '-mfp64', '-msched-weight', '-mload-store-pairs'],
+                      }],
                     ],
                     'cflags': [ '-mfp64', '-mno-odd-spreg' ],
                     'ldflags': [ '-mfp64', '-mno-odd-spreg' ],
                   }],
                   ['mips_arch_variant=="r2"', {
                     'conditions': [
                       ['mips_float_abi=="hard" and mips_fpu_mode!=""', {
                         'cflags': ['-m<(mips_fpu_mode)'],
                       }],
                       ['clang==1', {
@@ skipping 86 matching lines @@
                         'conditions': [
                           ['OS=="android"', {
                             'cflags': [ '-target mips64el-linux-android', '-march=mips64el', '-mcpu=mips64r6', ],
                             'ldflags': [ '-target mips64el-linux-android', ],
                           }],
                         ],
                       }, { # clang==0
                         'cflags': ['-mips64r6', '-Wa,-mips64r6'],
                         'ldflags': ['-mips64r6'],
                       }],
+                      ['mips_msa==1', {
+                        'cflags': ['-mmsa', '-mfp64', '-msched-weight', '-mload-store-pairs'],
+                      }],
                     ],
                   }],
                   ['mips_arch_variant=="r2"', {
                     'cflags': ['-mips64r2', '-Wa,-mips64r2'],
                     'ldflags': ['-mips64r2'],
                   }],
                   ['clang==1', {
                     'cflags!': [
                       # Clang does not support the following options.
                       '-finline-limit=64',
@@ skipping 2091 matching lines @@
     # settings in target dicts.  SYMROOT is a special case, because many other
     # Xcode variables depend on it, including variables such as
     # PROJECT_DERIVED_FILE_DIR.  When a source group corresponding to something
     # like PROJECT_DERIVED_FILE_DIR is added to a project, in order for the
     # files to appear (when present) in the UI as actual files and not red
     # red "missing file" proxies, the correct path to PROJECT_DERIVED_FILE_DIR,
     # and therefore SYMROOT, needs to be set at the project level.
     'SYMROOT': '<(DEPTH)/xcodebuild',
   },
 }