glsl: Refactor is_vec_{zero,one} to be methods of ir_constant

These predicates will be used in other places soon.

1 files changed, 24 insertions, 0 deletions

diff --git a/src/glsl/ir.h b/src/glsl/ir.h
index 80e0f67d6d8..6a70dede9b2 100644
--- a/src/glsl/ir.h
+++ b/src/glsl/ir.h
@@ -1441,10 +1441,34 @@ public:
 
    /**
     * Determine whether a constant has the same value as another constant
+    *
+    * \sa ir_constant::is_zero, ir_constant::is_one
     */
    bool has_value(const ir_constant *) const;
 
    /**
+    * Determine if a constant has the value zero
+    *
+    * \note
+    * This function always returns \c false for constants that are not
+    * scalars or vectors.
+    *
+    * \sa ir_constant::has_value, ir_constant::is_one
+    */
+   bool is_zero() const;
+
+   /**
+    * Determine if a constant has the value one
+    *
+    * \note
+    * This function always returns \c false for constants that are not
+    * scalars or vectors.
+    *
+    * \sa ir_constant::has_value, ir_constant::is_zero
+    */
+   bool is_one() const;
+
+   /**
     * Value of the constant.
     *
     * The field used to back the values supplied by the constant is determined