[MIPS] Add MIPS architecture support to opengl framework
Change-Id: Id7704d35bed14d96a85dc1f29db0566cd03872b5
diff --git a/opengl/libs/GLES2/gl2.cpp b/opengl/libs/GLES2/gl2.cpp
index fca42ec..fb890fc 100644
--- a/opengl/libs/GLES2/gl2.cpp
+++ b/opengl/libs/GLES2/gl2.cpp
@@ -41,6 +41,8 @@
#if USE_FAST_TLS_KEY
+ #if defined(__arm__)
+
#define GET_TLS(reg) "mrc p15, 0, " #reg ", c13, c0, 3 \n"
#define API_ENTRY(_api) __attribute__((naked)) _api
@@ -59,6 +61,44 @@
: \
);
+ #elif defined(__mips__)
+
+ #define API_ENTRY(_api) __attribute__((noinline)) _api
+
+ #define CALL_GL_API(_api, ...) \
+ register unsigned int t0 asm("t0"); \
+ register unsigned int fn asm("t1"); \
+ register unsigned int tls asm("v1"); \
+ register unsigned int v0 asm("v0"); \
+ asm volatile( \
+ ".set push\n\t" \
+ ".set noreorder\n\t" \
+ ".set mips32r2\n\t" \
+ "rdhwr %[tls], $29\n\t" \
+ "lw %[t0], %[OPENGL_API](%[tls])\n\t" \
+ "beqz %[t0], 1f\n\t" \
+ " move %[fn],$ra\n\t" \
+ "lw %[fn], %[API](%[t0])\n\t" \
+ "movz %[fn], $ra, %[fn]\n\t" \
+ "1:\n\t" \
+ "j %[fn]\n\t" \
+ " move %[v0], $0\n\t" \
+ ".set pop\n\t" \
+ : [fn] "=c"(fn), \
+ [tls] "=&r"(tls), \
+ [t0] "=&r"(t0), \
+ [v0] "=&r"(v0) \
+ : [OPENGL_API] "I"(TLS_SLOT_OPENGL_API*4), \
+ [API] "I"(__builtin_offsetof(gl_hooks_t, gl._api)) \
+ : \
+ );
+
+ #else
+
+ #error Unsupported architecture
+
+ #endif
+
#define CALL_GL_API_RETURN(_api, ...) \
CALL_GL_API(_api, __VA_ARGS__) \
return 0; // placate gcc's warnings. never reached.