math: new exp2f and expf

[oweals/musl.git] / src / internal / libm.h

diff --git a/src/internal/libm.h b/src/internal/libm.h
index 5212bab1d0ddcf6cdb1c090326946d9be2630c2a..98bf5c68ce4d187e79180b5c8c360d3e8abb7793 100644 (file)
--- a/src/internal/libm.h
+++ b/src/internal/libm.h
@@ -64,6 +64,22 @@ union ldshape {
 /* Support signaling NaNs.  */
 #define WANT_SNAN 0
 
+#ifndef TOINT_INTRINSICS
+#define TOINT_INTRINSICS 0
+#endif
+
+#if TOINT_INTRINSICS
+/* Round x to nearest int in all rounding modes, ties have to be rounded
+   consistently with converttoint so the results match.  If the result
+   would be outside of [-2^31, 2^31-1] then the semantics is unspecified.  */
+static double_t roundtoint(double_t);
+
+/* Convert x to nearest int in all rounding modes, ties have to be rounded
+   consistently with roundtoint.  If the result is not representible in an
+   int32_t then the semantics is unspecified.  */
+static int32_t converttoint(double_t);
+#endif
+
 /* Helps static branch prediction so hot path can be better optimized.  */
 #ifdef __GNUC__
 #define predict_true(x) __builtin_expect(!!(x), 1)