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Diffstat (limited to 'gcc-4.9/gcc/tree.def')
| -rw-r--r-- | gcc-4.9/gcc/tree.def | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/tree.def b/gcc-4.9/gcc/tree.def index f8d64447d..2e8fe1fdc 100644 --- a/gcc-4.9/gcc/tree.def +++ b/gcc-4.9/gcc/tree.def @@ -1172,6 +1172,22 @@ DEFTREECODE (DOT_PROD_EXPR, "dot_prod_expr", tcc_expression, 3) with the second argument. */ DEFTREECODE (WIDEN_SUM_EXPR, "widen_sum_expr", tcc_binary, 2) +/* Widening sad (sum of absolute differences). + The first two arguments are of type t1 which should be integer. + The third argument and the result are of type t2, such that t2 is at least + twice the size of t1. Like DOT_PROD_EXPR, SAD_EXPR (arg1,arg2,arg3) is + equivalent to (note we don't have WIDEN_MINUS_EXPR now, but we assume its + behavior is similar to WIDEN_SUM_EXPR): + tmp = WIDEN_MINUS_EXPR (arg1, arg2) + tmp2 = ABS_EXPR (tmp) + arg3 = PLUS_EXPR (tmp2, arg3) + or: + tmp = WIDEN_MINUS_EXPR (arg1, arg2) + tmp2 = ABS_EXPR (tmp) + arg3 = WIDEN_SUM_EXPR (tmp2, arg3) + */ +DEFTREECODE (SAD_EXPR, "sad_expr", tcc_expression, 3) + /* Widening multiplication. The two arguments are of type t1. The result is of type t2, such that t2 is at least twice |