1 files changed, 12 insertions, 6 deletions
diff --git a/doc/eval.texi b/doc/eval.texi
index d8c693f304..ac27750851 100644
--- a/doc/eval.texi
+++ b/doc/eval.texi
@@ -1,7 +1,7 @@
 @chapter Expression Evaluation
 @c man begin EXPRESSION EVALUATION
 
-When evaluating an arithemetic expression, Libav uses an internal
+When evaluating an arithemetic expression, FFmpeg uses an internal
 formula evaluator, implemented through the @file{libavutil/eval.h}
 interface.
 
@@ -72,6 +72,17 @@ integer. For example, "floor(-1.5)" is "-2.0".
 @item trunc(expr)
 Round the value of expression @var{expr} towards zero to the nearest
 integer. For example, "trunc(-1.5)" is "-1.0".
+
+@item sqrt(expr)
+Compute the square root of @var{expr}. This is equivalent to
+"(@var{expr})^.5".
+
+@item not(expr)
+Return 1.0 if @var{expr} is zero, 0.0 otherwise.
+
+@item pow(x, y)
+Compute the power of @var{x} elevated @var{y}, it is equivalent to
+"(@var{x})^(@var{y})".
 @end table
 
 Note that:
@@ -89,11 +100,6 @@ is equivalent to
 A*B + not(A)*C
 @end example
 
-When A evaluates to either 1 or 0, that is the same as
-@example
-A*B + eq(A,0)*C
-@end example
-
 In your C code, you can extend the list of unary and binary functions,
 and define recognized constants, so that they are available for your
 expressions.