From: Eric Anholt <eric@anholt.net>
Date: Thu, 8 Apr 2010 21:34:38 +0000 (-0700)
Subject: Add builtin normalize() functions.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=925759283a6396faeefb8b33761dd1c681d1593d;p=mesa.git

Add builtin normalize() functions.

Fixes CorrectSqizzle2.vert.
---

diff --git a/builtin_function.cpp b/builtin_function.cpp
index e537141e3f0..1fdf8829360 100644
--- a/builtin_function.cpp
+++ b/builtin_function.cpp
@@ -188,6 +188,24 @@ generate_max(exec_list *instructions,
 }
 
 
+static void
+generate_normalize(exec_list *instructions,
+		   ir_variable **declarations,
+		   const glsl_type *type)
+{
+   ir_dereference *const arg = new ir_dereference(declarations[0]);
+   ir_rvalue *temp;
+   ir_rvalue *result;
+
+   temp = new ir_expression(ir_binop_dot, glsl_type::float_type, arg, arg);
+   temp = new ir_expression(ir_unop_rsq, glsl_type::float_type, temp, NULL);
+   result = new ir_expression(ir_binop_mul, type, arg, temp);
+
+   ir_instruction *inst = new ir_return(result);
+   instructions->push_tail(inst);
+}
+
+
 static void
 generate_pow(exec_list *instructions,
 	       ir_variable **declarations,
@@ -386,6 +404,8 @@ generate_110_functions(glsl_symbol_table *symtab, exec_list *instructions)
    /* FINISHME: distance() */
    generate_dot_functions(symtab, instructions);
    /* FINISHME: cross() */
+   make_gentype_function(symtab, instructions, "normalize", 1,
+			 generate_normalize);
    /* FINISHME: normalize() */
    /* FINISHME: ftransform() */
    /* FINISHME: faceforward() */