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Diffstat (limited to 'gcc-4.9/gcc/doc/md.texi')
| -rw-r--r-- | gcc-4.9/gcc/doc/md.texi | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/doc/md.texi b/gcc-4.9/gcc/doc/md.texi index e2fe11b32..8e30aca94 100644 --- a/gcc-4.9/gcc/doc/md.texi +++ b/gcc-4.9/gcc/doc/md.texi @@ -4844,6 +4844,16 @@ 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 |