zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/build/uClibc/libm/s_isinff.c b/ap/build/uClibc/libm/s_isinff.c
new file mode 100644
index 0000000..6727f04
--- /dev/null
+++ b/ap/build/uClibc/libm/s_isinff.c
@@ -0,0 +1,23 @@
+/*
+ * Written by J.T. Conklin <jtc@netbsd.org>.
+ * Public domain.
+ */
+
+/*
+ * isinff(x) returns 1 if x is inf, -1 if x is -inf, else 0;
+ * no branching!
+ */
+
+#include "math.h"
+#include "math_private.h"
+
+int __isinff (float x)
+{
+ int32_t ix,t;
+ GET_FLOAT_WORD(ix,x);
+ t = ix & 0x7fffffff;
+ t ^= 0x7f800000;
+ t |= -t;
+ return ~(t >> 31) & (ix >> 30);
+}
+libm_hidden_def(__isinff)