libwebp: mips build fixes

dsp: detect mips64 & disable mips32 code
enc_mips32: workaround gcc-4.9 bug
BUG=374343

Review URL: https://codereview.chromium.org/442853003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@287728 0039d316-1c4b-4281-b951-d872f2087c98

third_party/libwebp/README.chromium

@@ -20,5 +20,8 @@ Local changes:
  * Removed examples/, documentation and build related files, keeping only
    the contents of src/ less mux/ which is unused.
  * Merged COPYING/PATENTS to LICENSE
+ * fcf7687 enc_mips32: workaround gcc-4.9 bug
+   (to be upstreamed if the problem persists in the final ndk r10 release)
 Cherry-picks:
   Revert patch f7fc4bc: dec/webp.c: don't wait for data before reporting w/h
+  0524d9e dsp: detect mips64 & disable mips32 code

third_party/libwebp/dsp/cpu.c

@@ -118,7 +118,7 @@ static int armCPUInfo(CPUFeature feature) {
   return 1;
 }
 VP8CPUInfo VP8GetCPUInfo = armCPUInfo;
-#elif defined(__mips__)
+#elif defined(WEBP_USE_MIPS32)
 static int mipsCPUInfo(CPUFeature feature) {
   (void)feature;
   return 1;

third_party/libwebp/dsp/dsp.h

@@ -60,7 +60,7 @@ extern "C" {
 #define WEBP_USE_NEON
 #endif
 
-#if defined(__mips__)
+#if defined(__mips__) && !defined(__mips64)
 #define WEBP_USE_MIPS32
 #endif
 

third_party/libwebp/dsp/enc_mips32.c

@@ -20,6 +20,10 @@
 #include "../enc/vp8enci.h"
 #include "../enc/cost.h"
 
+#if defined(__GNUC__) && defined(__ANDROID__) && LOCAL_GCC_VERSION == 0x409
+#define WORK_AROUND_GCC
+#endif
+
 static const int kC1 = 20091 + (1 << 16);
 static const int kC2 = 35468;
 
@@ -641,6 +645,7 @@ int VP8GetResidualCostMIPS32(int ctx0, const VP8Residual* const res) {
   GET_SSE_INNER(C, C + 1, C + 2, C + 3)   \
   GET_SSE_INNER(D, D + 1, D + 2, D + 3)
 
+#if !defined(WORK_AROUND_GCC)
 static int SSE16x16(const uint8_t* a, const uint8_t* b) {
   int count;
   int temp0, temp1, temp2, temp3, temp4, temp5, temp6, temp7;
@@ -742,6 +747,8 @@ static int SSE4x4(const uint8_t* a, const uint8_t* b) {
   return count;
 }
 
+#endif  // WORK_AROUND_GCC
+
 #undef GET_SSE_MIPS32
 #undef GET_SSE_MIPS32_INNER
 
@@ -759,9 +766,11 @@ void VP8EncDspInitMIPS32(void) {
   VP8TDisto4x4 = Disto4x4;
   VP8TDisto16x16 = Disto16x16;
   VP8FTransform = FTransform;
+#if !defined(WORK_AROUND_GCC)
   VP8SSE16x16 = SSE16x16;
   VP8SSE8x8 = SSE8x8;
   VP8SSE16x8 = SSE16x8;
   VP8SSE4x4 = SSE4x4;
+#endif
 #endif  // WEBP_USE_MIPS32
 }