mesa: Add new ir_unop_any() expression operation.

The previous any() implementation would generate arg0.x || arg0.y ||
arg0.z.  Having an expression operation for this makes it easy for the
backend to generate something easier (DPn + SNE for 915 FS, .any
predication on 965 VS)

1 files changed, 20 insertions, 0 deletions

diff --git a/src/mesa/program/ir_to_mesa.cpp b/src/mesa/program/ir_to_mesa.cpp
index 7a615f2d58f..ea2560af3ee 100644
--- a/src/mesa/program/ir_to_mesa.cpp
+++ b/src/mesa/program/ir_to_mesa.cpp
@@ -844,6 +844,26 @@ ir_to_mesa_visitor::visit(ir_expression *ir)
 	 ir_to_mesa_emit_op2(ir, OPCODE_SNE, result_dst, op[0], op[1]);
       }
       break;
+
+   case ir_unop_any:
+      switch (ir->operands[0]->type->vector_elements) {
+      case 4:
+	 ir_to_mesa_emit_op2(ir, OPCODE_DP4, result_dst, op[0], op[0]);
+	 break;
+      case 3:
+	 ir_to_mesa_emit_op2(ir, OPCODE_DP3, result_dst, op[0], op[0]);
+	 break;
+      case 2:
+	 ir_to_mesa_emit_op2(ir, OPCODE_DP2, result_dst, op[0], op[0]);
+	 break;
+      default:
+	 assert(!"unreached: ir_unop_any of non-bvec");
+	 break;
+      }
+      ir_to_mesa_emit_op2(ir, OPCODE_SNE,
+			  result_dst, result_src, src_reg_for_float(0.0));
+      break;
+
    case ir_binop_logic_xor:
       ir_to_mesa_emit_op2(ir, OPCODE_SNE, result_dst, op[0], op[1]);
       break;