glsl: Add a pass to lower bitfield-insert into bfm+bfi.

i965/Gen7+ and Radeon/Evergreen+ have bfm/bfi instructions to implement
bitfieldInsert() from ARB_gpu_shader5.

v2: Add ir_binop_bfm and ir_triop_bfi to st_glsl_to_tgsi.cpp.
    Remove spurious temporary assignment and dereference.

Reviewed-by: Chris Forbes <[email protected]>

1 files changed, 12 insertions, 0 deletions

diff --git a/src/glsl/ir_validate.cpp b/src/glsl/ir_validate.cpp
index 4a8df6953ee..26f09c71f63 100644
--- a/src/glsl/ir_validate.cpp
+++ b/src/glsl/ir_validate.cpp
@@ -474,6 +474,12 @@ ir_validate::visit_leave(ir_expression *ir)
       assert(ir->operands[1]->type == glsl_type::float_type);
       break;
 
+   case ir_binop_bfm:
+      assert(ir->type->is_integer());
+      assert(ir->operands[0]->type->is_integer());
+      assert(ir->operands[1]->type->is_integer());
+      break;
+
    case ir_binop_ubo_load:
       assert(ir->operands[0]->as_constant());
       assert(ir->operands[0]->type == glsl_type::uint_type);
@@ -487,6 +493,12 @@ ir_validate::visit_leave(ir_expression *ir)
       assert(ir->operands[2]->type == ir->operands[0]->type || ir->operands[2]->type == glsl_type::float_type);
       break;
 
+   case ir_triop_bfi:
+      assert(ir->operands[0]->type->is_integer());
+      assert(ir->operands[1]->type == ir->operands[2]->type);
+      assert(ir->operands[1]->type == ir->type);
+      break;
+
    case ir_triop_bitfield_extract:
       assert(ir->operands[0]->type == ir->type);
       assert(ir->operands[1]->type == glsl_type::int_type);