glsl: Extend ir_expression_operation for GLSL 3.00 pack/unpack functions (v2)

For each function {pack,unpack}{Snorm,Unorm,Half}2x16, add a corresponding
opcode to enum ir_expression_operation.  Validate the new opcodes in
ir_validate.cpp.

Also, add opcodes for scalarized variants of the Half2x16 functions.  (The
code generator for the i965 fragment shader requires that all vector
operations be scalarized.  A lowering pass, to be added later, will
scalarize the Half2x16 functions).

v2: Fix assertion message in ir_to_mesa [for idr].

Reviewed-by: Ian Romanick <[email protected]>
Reviewed-by: Matt Tuner <[email protected]>
Signed-off-by: Chad Versace <[email protected]>

1 files changed, 31 insertions, 0 deletions

diff --git a/src/glsl/ir.h b/src/glsl/ir.h
index c40964f9e7b..9fdfb18e25b 100644
--- a/src/glsl/ir.h
+++ b/src/glsl/ir.h
@@ -971,6 +971,28 @@ enum ir_expression_operation {
    ir_unop_dFdy,
    /*@}*/
 
+   /**
+    * \name Floating point pack and unpack operations.
+    */
+   /*@{*/
+   ir_unop_pack_snorm_2x16,
+   ir_unop_pack_unorm_2x16,
+   ir_unop_pack_half_2x16,
+   ir_unop_unpack_snorm_2x16,
+   ir_unop_unpack_unorm_2x16,
+   ir_unop_unpack_half_2x16,
+   /*@}*/
+
+   /**
+    * \name Lowered floating point unpacking operations.
+    *
+    * \see lower_packing_builtins_visitor::split_unpack_half_2x16
+    */
+   /*@{*/
+   ir_unop_unpack_half_2x16_split_x,
+   ir_unop_unpack_half_2x16_split_y,
+   /*@}*/
+
    ir_unop_noise,
 
    /**
@@ -1038,6 +1060,15 @@ enum ir_expression_operation {
    ir_binop_pow,
 
    /**
+    * \name Lowered floating point packing operations.
+    *
+    * \see lower_packing_builtins_visitor::split_pack_half_2x16
+    */
+   /*@{*/
+   ir_binop_pack_half_2x16_split,
+   /*@}*/
+
+   /**
     * Load a value the size of a given GLSL type from a uniform block.
     *
     * operand0 is the ir_constant uniform block index in the linked shader.