label routines for implementing branches, jumps

1 files changed, 42 insertions, 0 deletions

diff --git a/src/mesa/shader/slang/slang_label.h b/src/mesa/shader/slang/slang_label.h
new file mode 100644
index 0000000000..661624f173
--- /dev/null
+++ b/src/mesa/shader/slang/slang_label.h
@@ -0,0 +1,42 @@
+#ifndef SLANG_LABEL_H
+#define SLANG_LABEL_H 1
+
+#include "imports.h"
+#include "mtypes.h"
+#include "prog_instruction.h"
+
+
+struct slang_label_
+{
+   char *Name;
+   GLint Location;
+   /**
+    * List of instruction references (numbered starting at zero) which need
+    * their BranchTarget field filled in with the location eventually
+    * assigned to the label.
+    */
+   GLuint NumReferences;
+   GLuint *References;   /** Array [NumReferences] */
+};
+
+typedef struct slang_label_ slang_label;
+
+
+extern slang_label *
+_slang_label_new(const char *name);
+
+extern void
+_slang_label_delete(slang_label *l);
+
+extern void
+_slang_label_add_reference(slang_label *l, GLuint inst);
+
+extern GLint
+_slang_label_get_location(const slang_label *l);
+
+extern void
+_slang_label_set_location(slang_label *l, GLint location,
+                          struct gl_program *prog);
+
+
+#endif /* SLANG_LABEL_H */