allow_disabling_asm_avx2.patch

# HG changeset patch
# Parent  7591140de51c6147662ee708391fba138398316d
Bug 1341543: Allow disabling of inline ASM and AVX2 in libyyuv r=sotaro

diff --git a/media/libyuv/libyuv/include/libyuv/row.h b/media/libyuv/libyuv/include/libyuv/row.h
--- a/media/libyuv/libyuv/include/libyuv/row.h
+++ b/media/libyuv/libyuv/include/libyuv/row.h
@@ -181,17 +181,17 @@ extern "C" {
 // https://code.google.com/p/libyuv/issues/detail?id=517
 #define HAS_I422ALPHATOARGBROW_SSSE3
 #endif
 #endif
 
 // The following are available on all x86 platforms, but
 // require VS2012, clang 3.4 or gcc 4.7.
 // The code supports NaCL but requires a new compiler and validator.
-#if !defined(LIBYUV_DISABLE_X86) &&                          \
+#if !defined(LIBYUV_DISABLE_AVX2) && !defined(LIBYUV_DISABLE_X86) &&                          \
     (defined(VISUALC_HAS_AVX2) || defined(CLANG_HAS_AVX2) || \
      defined(GCC_HAS_AVX2))
 #define HAS_ARGBCOPYALPHAROW_AVX2
 #define HAS_ARGBCOPYYTOALPHAROW_AVX2
 #define HAS_ARGBEXTRACTALPHAROW_AVX2
 #define HAS_ARGBMIRRORROW_AVX2
 #define HAS_ARGBPOLYNOMIALROW_AVX2
 #define HAS_ARGBSHUFFLEROW_AVX2
diff --git a/media/libyuv/libyuv/libyuv.gyp b/media/libyuv/libyuv/libyuv.gyp
--- a/media/libyuv/libyuv/libyuv.gyp
+++ b/media/libyuv/libyuv/libyuv.gyp
@@ -21,16 +21,18 @@
     # Can be enabled if your jpeg has GYP support.
     'libyuv_disable_jpeg%': 1,
     # 'chromium_code' treats libyuv as internal and increases warning level.
     'chromium_code': 1,
     # clang compiler default variable usable by other apps that include libyuv.
     'clang%': 0,
     # Link-Time Optimizations.
     'use_lto%': 0,
+    'yuv_disable_asm%': 0,
+    'yuv_disable_avx2%': 0,
     'mips_msa%': 0,  # Default to msa off.
     'build_neon': 0,
     'build_msa': 0,
     'conditions': [
        ['(target_arch == "armv7" or target_arch == "armv7s" or \
        (target_arch == "arm" and arm_version >= 7) or target_arch == "arm64")\
        and (arm_neon == 1 or arm_neon_optional == 1)', {
          'build_neon': 1,
@@ -95,16 +97,29 @@
             }],
           ],
         }],
         ['build_msa != 0', {
           'defines': [
             'LIBYUV_MSA',
           ],
         }],
+        [ 'yuv_disable_asm != 0', {
+          'defines': [
+            # Enable the following 3 macros to turn off assembly for specified CPU.
+            'LIBYUV_DISABLE_X86',
+            'LIBYUV_DISABLE_NEON',
+            'LIBYUV_DISABLE_DSPR2',
+          ],
+        }],
+        [ 'yuv_disable_avx2 == 1', {
+          'defines': [
+            'LIBYUV_DISABLE_AVX2',
+          ]
+        }],
         ['build_with_mozilla == 1', {
           'defines': [
             'HAVE_JPEG'
           ],
           'cflags_mozilla': [
             '$(MOZ_JPEG_CFLAGS)',
           ],
         }],
@@ -133,16 +148,18 @@
           ],
         }],
       ], #conditions
       'defines': [
         # Enable the following 3 macros to turn off assembly for specified CPU.
         # 'LIBYUV_DISABLE_X86',
         # 'LIBYUV_DISABLE_NEON',
         # 'LIBYUV_DISABLE_DSPR2',
+        # This disables AVX2 (Haswell) support, overriding compiler checks
+        # 'LIBYUV_DISABLE_AVX2',
         # Enable the following macro to build libyuv as a shared library (dll).
         # 'LIBYUV_USING_SHARED_LIBRARY',
         # TODO(fbarchard): Make these into gyp defines.
       ],
       'include_dirs': [
         'include',
         '.',
       ],