Support MIPS DSP application-specific extension (ASE).

skia/BUILD.gn

 # Copyright (c) 2013 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/features.gni")
 import("//build/config/ui.gni")
 import("//testing/test.gni")
 if (current_cpu == "arm") {
   import("//build/config/arm.gni")
 }
+if (current_cpu == "mipsel" || current_cpu == "mipsel64") {
+  import("//build/config/mips.gni")
+}
 
 skia_support_gpu = !is_ios
 skia_support_pdf = !is_ios && (enable_basic_printing || enable_print_preview)
 
 # The list of Skia defines that are to be set for blink.
 gypi_blink_skia_defines =
     exec_script("//build/gypi_to_gn.py",
                 [
                   rebase_path(
                       "//third_party/WebKit/public/blink_skia_config.gypi"),
@@ skipping 522 matching lines @@
 source_set("skia_opts") {
   cflags = []
   defines = []
 
   if (current_cpu == "x86" || current_cpu == "x64") {
     sources = gypi_skia_opts.sse2_sources + gypi_skia_opts.ssse3_sources +
               gypi_skia_opts.sse41_sources +
               [
                 # Chrome-specific.
                 "ext/convolver_SSE2.cc",
+                "ext/convolver_SSE2.h",
               ]
 
     if (is_linux || is_mac) {
       cflags += [ "-msse4.1" ]
     }
   } else if (current_cpu == "arm") {
     # The assembly uses the frame pointer register (r7 in Thumb/r11 in
     # ARM), the compiler doesn't like that.
     cflags += [ "-fomit-frame-pointer" ]
 
     if (arm_version >= 7) {
       sources = gypi_skia_opts.armv7_sources
       if (arm_use_neon || arm_optionally_use_neon) {
         sources += gypi_skia_opts.neon_sources
 
         # Root build config sets -mfpu=$arm_fpu, which we expect to be neon
         # when running this.
         if (!arm_use_neon) {
           configs -= [ "//build/config/compiler:compiler_arm_fpu" ]
           cflags += [ "-mfpu=neon" ]
         }
       }
     } else {
       sources = gypi_skia_opts.none_sourcees
     }
   } else if (current_cpu == "mipsel") {
     cflags += [ "-fomit-frame-pointer" ]
-    sources = gypi_skia_opts.none_sources
+
+    if (mips_dsp_rev >= 1) {
+      sources = gypi_skia_opts.mips_dsp_sources
+      if (mips_dsp_rev >= 2) {
+        sources += [
+          # Chrome-specific.
+          "ext/convolver_mips_dspr2.cc",
+          "ext/convolver_mips_dspr2.h",
+        ]
+      }
+    } else {
+      sources = gypi_skia_opts.none_sources
+    }

[wtc, 2015/03/12 22:03:20]

The new code I added mimics the code for SSE2 and armv7 above.

   } else {
     assert(false, "Need to port cpu specific stuff from skia_library_opts.gyp")
   }
 
   if (is_android && !is_debug) {
     configs -= [ "//build/config/compiler:optimize" ]
     configs += [ "//build/config/compiler:optimize_max" ]
   }
 
   configs -= [ "//build/config/compiler:chromium_code" ]
@@ skipping 56 matching lines @@
     sources = [
       "tools/filter_fuzz_stub/filter_fuzz_stub.cc",
     ]
 
     deps = [
       ":skia",
       "//base",
     ]
   }
 }