commit 30a41aa1ccc47de41642308a243fa5df2bfeec06
author Jesse Hall <jessehall@google.com> Fri May 30 23:32:12 2014 -0700
committer Jesse Hall <jessehall@google.com> Fri Jun 06 16:31:53 2014 -0700
tree e8c137e767954a917f5c2323c470c7e88f49cb76
parent e86420e399993e0f49e5d7733b5fc87eb9fe179b

Add aarch64 EGL/GLES trampolines

Change-Id: Ia90e18d26ff3bdb7e643aff8d77cbaddd2ac2a03

opengl/libs/GLES2/gl2.cpp

diff --git a/opengl/libs/GLES2/gl2.cpp b/opengl/libs/GLES2/gl2.cpp
index ab6fb51..e112fec 100644
--- a/opengl/libs/GLES2/gl2.cpp
+++ b/opengl/libs/GLES2/gl2.cpp
@@ -40,7 +40,15 @@
 #undef CALL_GL_API
 #undef CALL_GL_API_RETURN
 
-#if defined(__arm__) && !USE_SLOW_BINDING
+#if USE_SLOW_BINDING
+
+    #define API_ENTRY(_api) _api
+
+    #define CALL_GL_API(_api, ...)                                       \
+        gl_hooks_t::gl_t const * const _c = &getGlThreadSpecific()->gl;  \
+        if (_c) return _c->_api(__VA_ARGS__);
+
+#elif defined(__arm__)
 
     #define GET_TLS(reg) "mrc p15, 0, " #reg ", c13, c0, 3 \n"
 
@@ -55,10 +63,28 @@
             :                                                   \
             : [tls] "J"(TLS_SLOT_OPENGL_API*4),                 \
               [api] "J"(__builtin_offsetof(gl_hooks_t, gl._api))    \
-            :                                                   \
+            : "r12"                                             \
             );
 
-#elif defined(__i386__) && !USE_SLOW_BINDING
+#elif defined(__aarch64__)
+
+    #define API_ENTRY(_api) __attribute__((noinline)) _api
+
+    #define CALL_GL_API(_api, ...)                                  \
+        asm volatile(                                               \
+            "mrs x16, tpidr_el0\n"                                  \
+            "ldr x16, [x16, %[tls]]\n"                              \
+            "cbz x16, 1f\n"                                         \
+            "ldr x16, [x16, %[api]]\n"                              \
+            "br  x16\n"                                             \
+            "1:\n"                                                  \
+            :                                                       \
+            : [tls] "i" (TLS_SLOT_OPENGL_API * sizeof(void*)),      \
+              [api] "i" (__builtin_offsetof(gl_hooks_t, gl._api))   \
+            : "x16"                                                 \
+        );
+
+#elif defined(__i386__)
 
     #define API_ENTRY(_api) __attribute__((noinline)) _api
 
@@ -77,7 +103,7 @@
             : "cc"                                                  \
             );
 
-#elif defined(__x86_64__) && !USE_SLOW_BINDING
+#elif defined(__x86_64__)
 
     #define API_ENTRY(_api) __attribute__((noinline)) _api
 
@@ -96,7 +122,7 @@
             : "cc"                                                  \
             );
 
-#elif defined(__mips__) && !USE_SLOW_BINDING
+#elif defined(__mips__)
 
     #define API_ENTRY(_api) __attribute__((noinline)) _api
 
@@ -128,14 +154,6 @@
             :                                                    \
             );
 
-#else
-
-    #define API_ENTRY(_api) _api
-
-    #define CALL_GL_API(_api, ...)                                       \
-        gl_hooks_t::gl_t const * const _c = &getGlThreadSpecific()->gl;  \
-        if (_c) return _c->_api(__VA_ARGS__);
-
 #endif
 
 #define CALL_GL_API_RETURN(_api, ...) \