i965/fs: Add support for translating ir_triop_fma into MAD.

[mesa.git] / src / mesa / drivers / dri / i965 / brw_fs_visitor.cpp

diff --git a/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp b/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp
index 984b08a6b60aecc3ee6db7bac8d615eb07731898..b0494364a1ddd93cbf384f0ebc51fec52898680d 100644 (file)
--- a/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp
@@ -336,6 +336,7 @@ fs_visitor::visit(ir_expression *ir)
         ir->operands[operand]->print();
          printf("\n");
       }
+      assert(this->result.is_valid_3src());
       op[operand] = this->result;
 
       /* Matrix expression operands should have been broken down to vector
@@ -361,12 +362,12 @@ fs_visitor::visit(ir_expression *ir)
       break;
    case ir_unop_neg:
       op[0].negate = !op[0].negate;
-      this->result = op[0];
+      emit(MOV(this->result, op[0]));
       break;
    case ir_unop_abs:
       op[0].abs = true;
       op[0].negate = false;
-      this->result = op[0];
+      emit(MOV(this->result, op[0]));
       break;
    case ir_unop_sign:
       temp = fs_reg(this, ir->type);
@@ -717,6 +718,13 @@ fs_visitor::visit(ir_expression *ir)
       break;
    }
 
+   case ir_triop_fma:
+      /* Note that the instruction's argument order is reversed from GLSL
+       * and the IR.
+       */
+      emit(MAD(this->result, op[2], op[1], op[0]));
+      break;
+
    case ir_triop_lrp:
       emit_lrp(this->result, op[0], op[1], op[2]);
       break;