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--- a/libm/s_floor.c
+++ b/libm/s_floor.c
@@ -81,3 +81,18 @@ libm_hidden_proto(floor)
return x;
}
libm_hidden_def(floor)
+
+
+libm_hidden_proto(trunc)
+double
+trunc(double x)
+{
+ if (!finite (x))
+ return x;
+
+ if (x < 0.0)
+ return - floor (-x);
+ else
+ return floor (x);
+}
+libm_hidden_def(trunc)
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