From: Kenneth Graunke <kenneth@whitecape.org>
Date: Fri, 30 Apr 2010 22:18:07 +0000 (-0700)
Subject: Implement "step" builtin.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=a2b63d3ed1197587f2441c4c2897ff32b3228d26;p=mesa.git

Implement "step" builtin.
---

diff --git a/builtins/110/step b/builtins/110/step
new file mode 100644
index 00000000000..1cc2b51f8fb
--- /dev/null
+++ b/builtins/110/step
@@ -0,0 +1,68 @@
+((function step
+   (signature float
+     (parameters
+       (declare (in) float edge)
+       (declare (in) float x))
+     ((return (expression float b2f (expression bool < (var_ref x) (var_ref edge))))))
+
+   (signature vec2
+     (parameters
+       (declare (in) float edge)
+       (declare (in) vec2 x))
+     ((declare () vec2 t)
+      (assign (constant bool (1)) (swiz x (var_ref t)) (expression float b2f (expression bool < (swiz x (var_ref x))(var_ref edge))))
+      (assign (constant bool (1)) (swiz y (var_ref t)) (expression float b2f (expression bool < (swiz y (var_ref x))(var_ref edge))))
+      (return (var_ref t))))
+
+   (signature vec3
+     (parameters
+       (declare (in) float edge)
+       (declare (in) vec3 x))
+     ((declare () vec3 t)
+      (assign (constant bool (1)) (swiz x (var_ref t)) (expression float b2f (expression bool < (swiz x (var_ref x))(var_ref edge))))
+      (assign (constant bool (1)) (swiz y (var_ref t)) (expression float b2f (expression bool < (swiz y (var_ref x))(var_ref edge))))
+      (assign (constant bool (1)) (swiz z (var_ref t)) (expression float b2f (expression bool < (swiz z (var_ref x))(var_ref edge))))
+      (return (var_ref t))))
+
+   (signature vec4
+     (parameters
+       (declare (in) float edge)
+       (declare (in) vec4 x))
+     ((declare () vec4 t)
+      (assign (constant bool (1)) (swiz x (var_ref t)) (expression float b2f (expression bool < (swiz x (var_ref x))(var_ref edge))))
+      (assign (constant bool (1)) (swiz y (var_ref t)) (expression float b2f (expression bool < (swiz y (var_ref x))(var_ref edge))))
+      (assign (constant bool (1)) (swiz z (var_ref t)) (expression float b2f (expression bool < (swiz z (var_ref x))(var_ref edge))))
+      (assign (constant bool (1)) (swiz w (var_ref t)) (expression float b2f (expression bool < (swiz w (var_ref x))(var_ref edge))))
+      (return (var_ref t))))
+
+   (signature vec2
+     (parameters
+       (declare (in) vec2 edge)
+       (declare (in) vec2 x))
+     ((declare () vec2 t)
+      (assign (constant bool (1)) (swiz x (var_ref t)) (expression float b2f (expression bool < (swiz x (var_ref x))(swiz x (var_ref edge)))))
+      (assign (constant bool (1)) (swiz y (var_ref t)) (expression float b2f (expression bool < (swiz y (var_ref x))(swiz y (var_ref edge)))))
+      (return (var_ref t))))
+
+   (signature vec3
+     (parameters
+       (declare (in) vec3 edge)
+       (declare (in) vec3 x))
+     ((declare () vec3 t)
+      (assign (constant bool (1)) (swiz x (var_ref t)) (expression float b2f (expression bool < (swiz x (var_ref x))(swiz x (var_ref edge)))))
+      (assign (constant bool (1)) (swiz y (var_ref t)) (expression float b2f (expression bool < (swiz y (var_ref x))(swiz y (var_ref edge)))))
+      (assign (constant bool (1)) (swiz z (var_ref t)) (expression float b2f (expression bool < (swiz z (var_ref x))(swiz z (var_ref edge)))))
+      (return (var_ref t))))
+
+   (signature vec4
+     (parameters
+       (declare (in) vec4 edge)
+       (declare (in) vec4 x))
+     ((declare () vec4 t)
+      (assign (constant bool (1)) (swiz x (var_ref t)) (expression float b2f (expression bool < (swiz x (var_ref x))(swiz x (var_ref edge)))))
+      (assign (constant bool (1)) (swiz y (var_ref t)) (expression float b2f (expression bool < (swiz y (var_ref x))(swiz y (var_ref edge)))))
+      (assign (constant bool (1)) (swiz z (var_ref t)) (expression float b2f (expression bool < (swiz y (var_ref x))(swiz z (var_ref edge)))))
+      (assign (constant bool (1)) (swiz w (var_ref t)) (expression float b2f (expression bool < (swiz w (var_ref x))(swiz w (var_ref edge)))))
+      (return (var_ref t))))
+))
+