Documentation update for GYP and envionment variables

Bug: libyuv:816, libyuv:804
Change-Id: I73a6960b2cc6f3ca31c43c44ccd8b01f5e9e7013
Test" Untested
Reviewed-on: https://chromium-review.googlesource.com/1205053Reviewed-by: Nico Weber <thakis@chromium.org>
Commit-Queue: Frank Barchard <fbarchard@chromium.org>

README.chromium

 Name: libyuv
 URL: http://code.google.com/p/libyuv/
-Version: 1716
+Version: 1717
 License: BSD
 License File: LICENSE
 

docs/environment_variables.md

@@ -6,7 +6,10 @@ For test purposes, environment variables can be set to control libyuv behavior.
 
 By default the cpu is detected and the most advanced form of SIMD is used.  But you can disable instruction sets selectively, or completely, falling back on C code.  Set the variable to 1 to disable the specified instruction set.
 
+## All CPUs
     LIBYUV_DISABLE_ASM
+
+## Intel CPUs
     LIBYUV_DISABLE_X86
     LIBYUV_DISABLE_SSE2
     LIBYUV_DISABLE_SSSE3
@@ -14,12 +17,25 @@ By default the cpu is detected and the most advanced form of SIMD is used.  But
     LIBYUV_DISABLE_SSE42
     LIBYUV_DISABLE_AVX
     LIBYUV_DISABLE_AVX2
-    LIBYUV_DISABLE_AVX512BW
     LIBYUV_DISABLE_ERMS
     LIBYUV_DISABLE_FMA3
-    LIBYUV_DISABLE_MSA
+    LIBYUV_DISABLE_F16C
+    LIBYUV_DISABLE_AVX512BW
+    LIBYUV_DISABLE_AVX512VL
+    LIBYUV_DISABLE_AVX512VBMI
+    LIBYUV_DISABLE_AVX512VBMI2
+    LIBYUV_DISABLE_AVX512VBITALG
+    LIBYUV_DISABLE_AVX512VPOPCNTDQ
+    LIBYUV_DISABLE_GFNI
+
+## ARM CPUs
+
     LIBYUV_DISABLE_NEON
 
+## MIPS CPUs
+    LIBYUV_DISABLE_MSA
+    LIBYUV_DISABLE_MMI
+
 # Test Width/Height/Repeat
 
 The unittests default to a small image (128x72) to run fast.  This can be set by environment variable to test a specific resolutions.

docs/getting_started.md

@@ -27,7 +27,7 @@ Then you'll get a .gclient file like:
       },
     ];
 
-For iOS add `;target_os=['ios'];` to your OSX .gclient and run `GYP_DEFINES="OS=ios" gclient sync.`
+For iOS add `;target_os=['ios'];` to your OSX .gclient and run `gclient sync.`
 
 Browse the Git reprository: https://chromium.googlesource.com/libyuv/libyuv/+/master
 
@@ -48,11 +48,8 @@ For Android add `;target_os=['android'];` to your Linux .gclient
 
 Then run:
 
-    export GYP_DEFINES="OS=android"
     gclient sync
 
-The sync will generate native build files for your environment using gyp (Windows: Visual Studio, OSX: XCode, Linux: make). This generation can also be forced manually: `gclient runhooks`
-
 To get just the source (not buildable):
 
     git clone https://chromium.googlesource.com/libyuv/libyuv
@@ -135,8 +132,8 @@ ia32
 
 mips
 
-    gn gen out/Release "--args=is_debug=false target_os=\"android\" target_cpu=\"mips64el\" mips_arch_variant=\"r6\" mips_use_msa=true is_component_build=true is_clang=true"
-    gn gen out/Debug "--args=is_debug=true target_os=\"android\" target_cpu=\"mips64el\" mips_arch_variant=\"r6\" mips_use_msa=true is_component_build=true is_clang=true"
+    gn gen out/Release "--args=is_debug=false target_os=\"android\" target_cpu=\"mips64el\" mips_arch_variant=\"r6\" mips_use_msa=true is_component_build=true"
+    gn gen out/Debug "--args=is_debug=true target_os=\"android\" target_cpu=\"mips64el\" mips_arch_variant=\"r6\" mips_use_msa=true is_component_build=true"
     ninja -v -C out/Debug libyuv_unittest
     ninja -v -C out/Release libyuv_unittest
 
@@ -182,8 +179,8 @@ Running test with C code:
 
 mips
 
-   gn gen out/Release "--args=is_debug=false target_os=\"linux\" target_cpu=\"mips64el\" mips_arch_variant=\"loongson3\" mips_use_mmi=true is_component_build=false is_clang=false use_sysroot=false use_gold=false"
-   gn gen out/Debug "--args=is_debug=true target_os=\"linux\" target_cpu=\"mips64el\" mips_arch_variant=\"loongson3\" mips_use_mmi=true is_component_build=false is_clang=false use_sysroot=false use_gold=false"
+   gn gen out/Release "--args=is_debug=false target_os=\"linux\" target_cpu=\"mips64el\" mips_arch_variant=\"loongson3\" mips_use_mmi=true is_component_build=false use_sysroot=false use_gold=false"
+   gn gen out/Debug "--args=is_debug=true target_os=\"linux\" target_cpu=\"mips64el\" mips_arch_variant=\"loongson3\" mips_use_mmi=true is_component_build=false use_sysroot=false use_gold=false"
    ninja -v -C out/Debug libyuv_unittest
    ninja -v -C out/Release libyuv_unittest
 

include/libyuv/version.h

@@ -11,6 +11,6 @@
 #ifndef INCLUDE_LIBYUV_VERSION_H_
 #define INCLUDE_LIBYUV_VERSION_H_
 
-#define LIBYUV_VERSION 1716
+#define LIBYUV_VERSION 1717
 
 #endif  // INCLUDE_LIBYUV_VERSION_H_

unit_test/unit_test.cc

@@ -66,6 +66,9 @@ int TestCpuEnv(int cpu_info) {
   if (TestEnv("LIBYUV_DISABLE_MSA")) {
     cpu_info &= ~libyuv::kCpuHasMSA;
   }
+  if (TestEnv("LIBYUV_DISABLE_MMI")) {
+    cpu_info &= ~libyuv::kCpuHasMMI;
+  }
 #endif
 #if !defined(__pnacl__) && !defined(__CLR_VER) &&                   \
     (defined(__x86_64__) || defined(_M_X64) || defined(__i386__) || \