glsl: Add i2b() and b2i() to ir_builder.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Chad Versace <chad.versace@linux.intel.com>

src/glsl/ir_builder.cpp

@@ -369,6 +369,18 @@ bitcast_u2f(operand a)
    return expr(ir_unop_bitcast_u2f, a);
 }
 
+ir_expression*
+i2b(operand a)
+{
+   return expr(ir_unop_i2b, a);
+}
+
+ir_expression*
+b2i(operand a)
+{
+   return expr(ir_unop_b2i, a);
+}
+
 ir_if*
 if_tree(operand condition,
         ir_instruction *then_branch)

src/glsl/ir_builder.h

@@ -162,6 +162,8 @@ ir_expression *u2f(operand a);
 ir_expression *bitcast_u2f(operand a);
 ir_expression *i2u(operand a);
 ir_expression *u2i(operand a);
+ir_expression *b2i(operand a);
+ir_expression *i2b(operand a);
 
 /**
  * Swizzle away later components, but preserve the ordering.