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| author | Richard Henderson <rth@redhat.com> | 2012-06-28 12:01:28 -0700 |
|---|---|---|
| committer | Richard Henderson <rth@gcc.gnu.org> | 2012-06-28 12:01:28 -0700 |
| commit | 99651574134ba16dc5256f70b2dcf13473f7e497 (patch) | |
| tree | a130e1fa1b2258babeb35968d7d5b721032a4286 /gcc | |
| parent | 5deb57cb1bb8b3c7e79e16d21e4410611dab5684 (diff) | |
| download | gcc-99651574134ba16dc5256f70b2dcf13473f7e497.zip gcc-99651574134ba16dc5256f70b2dcf13473f7e497.tar.gz gcc-99651574134ba16dc5256f70b2dcf13473f7e497.tar.bz2 | |
Document MULT_HIGHPART_EXPR
From-SVN: r189054
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 4 | ||||
| -rw-r--r-- | gcc/doc/generic.texi | 6 |
2 files changed, 10 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 4e32776..29ecf36 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -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 diff --git a/gcc/doc/generic.texi b/gcc/doc/generic.texi index e99366f..c48b663 100644 --- a/gcc/doc/generic.texi +++ b/gcc/doc/generic.texi @@ -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. |