[Mesa-dev] [PATCHv2 05/21] mesa: android has no log2f nor ffs

[Chia-I Wu]

Define log2f(v) to be logf(v) / M_LN2 and ffs to __builtin_ffs.
---
 src/mesa/main/imports.h |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/src/mesa/main/imports.h b/src/mesa/main/imports.h
index 3fa1db0..70defdc 100644
--- a/src/mesa/main/imports.h
+++ b/src/mesa/main/imports.h
@@ -134,7 +134,13 @@ typedef union { GLfloat f; GLint i; } fi_type;
 #define exp2f(f) ((float) exp2(f))
 #define floorf(f) ((float) floor(f))
 #define logf(f) ((float) log(f))
+
+#ifdef ANDROID
+#define log2f(f) (logf(f) * (float) (1.0 / M_LN2))
+#else
 #define log2f(f) ((float) log2(f))
+#endif
+
 #define powf(x,y) ((float) pow(x,y))
 #define sinf(f) ((float) sin(f))
 #define sinhf(f) ((float) sinh(f))
@@ -562,7 +568,7 @@ _mesa_init_sqrt_table(void);
 
 #ifdef __GNUC__
 
-#ifdef __MINGW32__
+#if defined(__MINGW32__) || defined(ANDROID)
 #define ffs __builtin_ffs
 #define ffsll __builtin_ffsll
 #endif
-- 
1.7.5.4