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Document MULT_HIGHPART_EXPR 

From-SVN: r189054
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Richard Henderson 2012-06-28 12:01:28 -07:00 committed by Richard Henderson
parent 5deb57cb1b
commit 9965157413
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gcc/ChangeLog
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@ -1,3 +1,7 @@
2012-06-28 Richard Henderson <rth@redhat.com>
* doc/generic.texi (MULT_HIGHPART_EXPR): Document it.
2012-06-28 Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/51581

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gcc/doc/generic.texi
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@ -1235,6 +1235,7 @@ the byte offset of the field, but should not be used directly; call
@tindex PLUS_EXPR
@tindex MINUS_EXPR
@tindex MULT_EXPR
@tindex MULT_HIGHPART_EXPR
@tindex RDIV_EXPR
@tindex TRUNC_DIV_EXPR
@tindex FLOOR_DIV_EXPR
@ -1433,6 +1434,11 @@ one operand is of floating type and the other is of integral type.
The behavior of these operations on signed arithmetic overflow is
controlled by the @code{flag_wrapv} and @code{flag_trapv} variables.
@item MULT_HIGHPART_EXPR
This node represents the ``high-part'' of a widening multiplication.
For an integral type with @var{b} bits of precision, the result is
the most significant @var{b} bits of the full @math{2@var{b}} product.
@item RDIV_EXPR
This node represents a floating point division operation.