Support MIPS DSP application-specific extension (ASE).

skia/BUILD.gn

Index: skia/BUILD.gn
diff --git a/skia/BUILD.gn b/skia/BUILD.gn
index 248bc1cff3483845385662604bcdcce3ea3b0ca4..977596af68d10f71edd17fc4f31c0c38a67f9cd3 100644
--- a/skia/BUILD.gn
+++ b/skia/BUILD.gn
@@ -8,6 +8,9 @@ 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)
@@ -550,6 +553,7 @@ source_set("skia_opts") {
               [
                 # Chrome-specific.
                 "ext/convolver_SSE2.cc",
+                "ext/convolver_SSE2.h",
               ]
 
     if (is_linux || is_mac) {
@@ -577,7 +581,19 @@ source_set("skia_opts") {
     }
   } 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")
   }