i965: Add support for ir_triop_csel.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>

3 files changed, 13 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/i965/brw_fs_channel_expressions.cpp b/src/mesa/drivers/dri/i965/brw_fs_channel_expressions.cpp
index fa02d9b..b4c33e6 100644
--- a/src/mesa/drivers/dri/i965/brw_fs_channel_expressions.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs_channel_expressions.cpp
@@ -362,6 +362,7 @@ ir_channel_expressions_visitor::visit_leave(ir_assignment *ir)
 
    case ir_triop_fma:
    case ir_triop_lrp:
+   case ir_triop_csel:
    case ir_triop_bitfield_extract:
       for (i = 0; i < vector_elements; i++) {
 	 ir_rvalue *op0 = get_element(op_var[0], i);
diff --git a/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp b/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp
index 543fe5e..d935c7b 100644
--- a/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp
@@ -728,6 +728,12 @@ fs_visitor::visit(ir_expression *ir)
    case ir_triop_lrp:
       emit_lrp(this->result, op[0], op[1], op[2]);
       break;
+
+   case ir_triop_csel:
+      emit(CMP(reg_null_d, op[0], fs_reg(0), BRW_CONDITIONAL_NZ));
+      inst = emit(BRW_OPCODE_SEL, this->result, op[1], op[2]);
+      inst->predicate = BRW_PREDICATE_NORMAL;
+      break;
    }
 }
 
diff --git a/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp b/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp
index 3a2f047..7ced32c 100644
--- a/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp
+++ b/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp
@@ -1588,6 +1588,12 @@ vec4_visitor::visit(ir_expression *ir)
       emit(LRP(result_dst, op[2], op[1], op[0]));
       break;
 
+   case ir_triop_csel:
+      emit(CMP(dst_null_d(), op[0], src_reg(0), BRW_CONDITIONAL_NZ));
+      inst = emit(BRW_OPCODE_SEL, result_dst, op[1], op[2]);
+      inst->predicate = BRW_PREDICATE_NORMAL;
+      break;
+
    case ir_triop_bfi:
       op[0] = fix_3src_operand(op[0]);
       op[1] = fix_3src_operand(op[1]);