diff options
| -rw-r--r-- | src/gallium/drivers/r600/sb/sb_expr.cpp | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/src/gallium/drivers/r600/sb/sb_expr.cpp b/src/gallium/drivers/r600/sb/sb_expr.cpp index 556a05da395..3dd3a4815ba 100644 --- a/src/gallium/drivers/r600/sb/sb_expr.cpp +++ b/src/gallium/drivers/r600/sb/sb_expr.cpp @@ -598,9 +598,13 @@ bool expr_handler::fold_assoc(alu_node *n) { unsigned op = n->bc.op; bool allow_neg = false, cur_neg = false; + bool distribute_neg = false; switch(op) { case ALU_OP2_ADD: + distribute_neg = true; + allow_neg = true; + break; case ALU_OP2_MUL: case ALU_OP2_MUL_IEEE: allow_neg = true; @@ -632,7 +636,7 @@ bool expr_handler::fold_assoc(alu_node *n) { if (v1->is_const()) { literal arg = v1->get_const_value(); apply_alu_src_mod(a->bc, 1, arg); - if (cur_neg) + if (cur_neg && distribute_neg) arg.f = -arg.f; if (a == n) @@ -660,7 +664,7 @@ bool expr_handler::fold_assoc(alu_node *n) { if (v0->is_const()) { literal arg = v0->get_const_value(); apply_alu_src_mod(a->bc, 0, arg); - if (cur_neg) + if (cur_neg && distribute_neg) arg.f = -arg.f; if (last_arg == 0) { |