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-rw-r--r--src/glsl/ir.cpp10
-rw-r--r--src/glsl/ir.h47
2 files changed, 36 insertions, 21 deletions
diff --git a/src/glsl/ir.cpp b/src/glsl/ir.cpp
index 8c5441d332b..574ef3e1832 100644
--- a/src/glsl/ir.cpp
+++ b/src/glsl/ir.cpp
@@ -31,6 +31,16 @@ ir_rvalue::ir_rvalue()
this->type = glsl_type::error_type;
}
+bool ir_rvalue::is_zero() const
+{
+ return false;
+}
+
+bool ir_rvalue::is_one() const
+{
+ return false;
+}
+
/**
* Modify the swizzle make to move one component to another
*
diff --git a/src/glsl/ir.h b/src/glsl/ir.h
index 3fc834906a3..3ea7301f472 100644
--- a/src/glsl/ir.h
+++ b/src/glsl/ir.h
@@ -171,6 +171,30 @@ public:
return NULL;
}
+ /**
+ * Determine if an r-value has the value zero
+ *
+ * The base implementation of this function always returns \c false. The
+ * \c ir_constant class over-rides this function to return \c true \b only
+ * for vector and scalar types that have all elements set to the value
+ * zero (or \c false for booleans).
+ *
+ * \sa ir_constant::has_value, ir_rvalue::is_one
+ */
+ virtual bool is_zero() const;
+
+ /**
+ * Determine if an r-value has the value one
+ *
+ * The base implementation of this function always returns \c false. The
+ * \c ir_constant class over-rides this function to return \c true \b only
+ * for vector and scalar types that have all elements set to the value
+ * one (or \c true for booleans).
+ *
+ * \sa ir_constant::has_value, ir_rvalue::is_zero
+ */
+ virtual bool is_one() const;
+
protected:
ir_rvalue();
};
@@ -1460,27 +1484,8 @@ public:
*/
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;
+ virtual bool is_zero() const;
+ virtual bool is_one() const;
/**
* Value of the constant.