Detect asimd as same as Neon for Arm features. Used on Juno aarch64 linux.

BUG=361
TESTED=.\libyuv_unittest --gtest_filter=libyuvTest.TestLinuxNeon
R=tpsiaki@google.com

Review URL: https://webrtc-codereview.appspot.com/31439004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1088 16f28f9a-4ce2-e073-06de-1de4eb20be90

README.chromium

 Name: libyuv
 URL: http://code.google.com/p/libyuv/
-Version: 1086
+Version: 1088
 License: BSD
 License File: LICENSE
 

include/libyuv/version.h

@@ -11,6 +11,6 @@
 #ifndef INCLUDE_LIBYUV_VERSION_H_  // NOLINT
 #define INCLUDE_LIBYUV_VERSION_H_
 
-#define LIBYUV_VERSION 1086
+#define LIBYUV_VERSION 1088
 
 #endif  // INCLUDE_LIBYUV_VERSION_H_  NOLINT

source/cpu_id.cc

@@ -135,6 +135,12 @@ int ArmCpuCaps(const char* cpuinfo_name) {
         fclose(f);
         return kCpuHasNEON;
       }
+      // aarch64 uses asimd for Neon.
+      p = strstr(cpuinfo_line, " asimd");
+      if (p && (p[6] == ' ' || p[6] == '\n')) {
+        fclose(f);
+        return kCpuHasNEON;
+      }
     }
   }
   fclose(f);

unit_test/cpu_test.cc

@@ -126,6 +126,7 @@ TEST_F(libyuvTest, TestLinuxNeon) {
   if (FileExists("../../unit_test/testdata/arm_v7.txt")) {
     EXPECT_EQ(0, ArmCpuCaps("../../unit_test/testdata/arm_v7.txt"));
     EXPECT_EQ(kCpuHasNEON, ArmCpuCaps("../../unit_test/testdata/tegra3.txt"));
+    EXPECT_EQ(kCpuHasNEON, ArmCpuCaps("../../unit_test/testdata/juno.txt"));
   } else {
     printf("WARNING: unable to load \"../../unit_test/testdata/arm_v7.txt\"\n");
   }

unit_test/testdata/juno.txt

+Processor       : AArch64 Processor rev 0 (aarch64)
+processor       : 0
+processor       : 1
+processor       : 2
+processor       : 3
+processor       : 4
+processor       : 5
+Features        : fp asimd evtstrm aes pmull sha1 sha2 crc32
+CPU implementer : 0x41
+CPU architecture: AArch64
+CPU variant     : 0x0
+CPU part        : 0xd07
+CPU revision    : 0
+
+Hardware        : Juno