math: new logf

[musl] / src / internal / libm.h

diff --git a/src/internal/libm.h b/src/internal/libm.h
index a52a0b8..5212bab 100644 (file)
--- a/src/internal/libm.h
+++ b/src/internal/libm.h
@@ -59,6 +59,20 @@ union ldshape {
 #error Unsupported long double representation
 #endif
 
+/* Support non-nearest rounding mode.  */
+#define WANT_ROUNDING 1
+/* Support signaling NaNs.  */
+#define WANT_SNAN 0
+
+/* Helps static branch prediction so hot path can be better optimized.  */
+#ifdef __GNUC__
+#define predict_true(x) __builtin_expect(!!(x), 1)
+#define predict_false(x) __builtin_expect(x, 0)
+#else
+#define predict_true(x) (x)
+#define predict_false(x) (x)
+#endif
+
 /* Evaluate an expression as the specified type. With standard excess
    precision handling a type cast or assignment is enough (with
    -ffloat-store an assignment is required, in old compilers argument
@@ -222,5 +236,10 @@ hidden float __math_uflowf(uint32_t);
 hidden float __math_oflowf(uint32_t);
 hidden float __math_divzerof(uint32_t);
 hidden float __math_invalidf(float);
+hidden double __math_xflow(uint32_t, double);
+hidden double __math_uflow(uint32_t);
+hidden double __math_oflow(uint32_t);
+hidden double __math_divzero(uint32_t);
+hidden double __math_invalid(double);
 
 #endif