diff options
| author | Cong Hou <congh@google.com> | 2014-06-24 22:58:43 -0400 |
|---|---|---|
| committer | Cong Hou <congh@gcc.gnu.org> | 2014-06-24 22:58:43 -0400 |
| commit | 79d652a570805345efea0ee370c0f7f07eada78c (patch) | |
| tree | 84fbd0fced8d4e426b96dfd6edf4dfa423455a70 /gcc/doc | |
| parent | 22543f17af2e2f04ab57d7fc9bfed94da90345ba (diff) | |
| download | gcc-79d652a570805345efea0ee370c0f7f07eada78c.zip gcc-79d652a570805345efea0ee370c0f7f07eada78c.tar.gz gcc-79d652a570805345efea0ee370c0f7f07eada78c.tar.bz2 | |
tree-vect-patterns.c (vect_recog_sad_pattern): New function for SAD pattern recognition.
2014-06-24 Cong Hou <congh@google.com>
* tree-vect-patterns.c (vect_recog_sad_pattern): New function for SAD
pattern recognition.
(type_conversion_p): PROMOTION is true if it's a type promotion
conversion, and false otherwise. Return true if the given expression
is a type conversion one.
* tree-vectorizer.h: Adjust the number of patterns.
* tree.def: Add SAD_EXPR.
* optabs.def: Add sad_optab.
* cfgexpand.c (expand_debug_expr): Add SAD_EXPR case.
* expr.c (expand_expr_real_2): Likewise.
* gimple-pretty-print.c (dump_ternary_rhs): Likewise.
* gimple.c (get_gimple_rhs_num_ops): Likewise.
* optabs.c (optab_for_tree_code): Likewise.
* tree-cfg.c (estimate_operator_cost): Likewise.
* tree-ssa-operands.c (get_expr_operands): Likewise.
* tree-vect-loop.c (get_initial_def_for_reduction): Likewise.
* config/i386/sse.md: Add SSE2 and AVX2 expand for SAD.
* doc/generic.texi: Add document for SAD_EXPR.
* doc/md.texi: Add document for ssad and usad.
2014-06-24 Cong Hou <congh@google.com>
* gcc.dg/vect/vect-reduc-sad.c: New.
* lib/target-supports.exp (check_effective_target_vect_usad_char): New.
From-SVN: r211966
Diffstat (limited to 'gcc/doc')
| -rw-r--r-- | gcc/doc/generic.texi | 10 | ||||
| -rw-r--r-- | gcc/doc/md.texi | 10 |
2 files changed, 20 insertions, 0 deletions
diff --git a/gcc/doc/generic.texi b/gcc/doc/generic.texi index 7afb055..4476f28 100644 --- a/gcc/doc/generic.texi +++ b/gcc/doc/generic.texi @@ -1702,6 +1702,7 @@ a value from @code{enum annot_expr_kind}. @tindex VEC_PACK_TRUNC_EXPR @tindex VEC_PACK_SAT_EXPR @tindex VEC_PACK_FIX_TRUNC_EXPR +@tindex SAD_EXPR @table @code @item VEC_LSHIFT_EXPR @@ -1782,6 +1783,15 @@ value, it is taken from the second operand. It should never evaluate to any other value currently, but optimizations should not rely on that property. In contrast with a @code{COND_EXPR}, all operands are always evaluated. + +@item SAD_EXPR +This node represents the Sum of Absolute Differences operation. The three +operands must be vectors of integral types. The first and second operand +must have the same type. The size of the vector element of the third +operand must be at lease twice of the size of the vector element of the +first and second one. The SAD is calculated between the first and second +operands, added to the third operand, and returned. + @end table diff --git a/gcc/doc/md.texi b/gcc/doc/md.texi index 1c3a326..539865e 100644 --- a/gcc/doc/md.texi +++ b/gcc/doc/md.texi @@ -4842,6 +4842,16 @@ wider mode, is computed and added to operand 3. Operand 3 is of a mode equal or wider than the mode of the product. The result is placed in operand 0, which is of the same mode as operand 3. +@cindex @code{ssad@var{m}} instruction pattern +@item @samp{ssad@var{m}} +@cindex @code{usad@var{m}} instruction pattern +@item @samp{usad@var{m}} +Compute the sum of absolute differences of two signed/unsigned elements. +Operand 1 and operand 2 are of the same mode. Their absolute difference, which +is of a wider mode, is computed and added to operand 3. Operand 3 is of a mode +equal or wider than the mode of the absolute difference. The result is placed +in operand 0, which is of the same mode as operand 3. + @cindex @code{ssum_widen@var{m3}} instruction pattern @item @samp{ssum_widen@var{m3}} @cindex @code{usum_widen@var{m3}} instruction pattern |