diff options
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_fs_visitor.cpp | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp b/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp index 6ddb267cc19..7c062ec8abd 100644 --- a/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp +++ b/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp @@ -431,10 +431,21 @@ fs_visitor::try_emit_mad(ir_expression *ir) ir_rvalue *nonmul = ir->operands[1]; ir_expression *mul = ir->operands[0]->as_expression(); + bool mul_negate = false; + if (mul && mul->operation == ir_unop_neg) { + mul = mul->operands[0]->as_expression(); + mul_negate = true; + } + if (!mul || mul->operation != ir_binop_mul) { nonmul = ir->operands[0]; mul = ir->operands[1]->as_expression(); + if (mul && mul->operation == ir_unop_neg) { + mul = mul->operands[0]->as_expression(); + mul_negate = true; + } + if (!mul || mul->operation != ir_binop_mul) return false; } @@ -449,6 +460,7 @@ fs_visitor::try_emit_mad(ir_expression *ir) mul->operands[0]->accept(this); fs_reg src1 = this->result; + src1.negate ^= mul_negate; mul->operands[1]->accept(this); fs_reg src2 = this->result; |