Implement "sign" builtin via a new expression operator.

2 files changed, 68 insertions, 0 deletions

diff --git a/builtins/110/sign b/builtins/110/sign
new file mode 100644
index 00000000000..7d540de405b
--- /dev/null
+++ b/builtins/110/sign
@@ -0,0 +1,34 @@
+((function sign
+   (signature float
+     (parameters
+       (declare (in) float x))
+     ((return (expression float sign (var_ref x)))))
+
+   (signature vec2
+     (parameters
+       (declare (in) vec2 x))
+     ((declare () vec2 t)
+      (assign (constant bool (1)) (swiz x (var_ref t)) (expression float sign (swiz x (var_ref x))))
+      (assign (constant bool (1)) (swiz y (var_ref t)) (expression float sign (swiz y (var_ref x))))
+      (return (var_ref t))))
+
+   (signature vec3
+     (parameters
+       (declare (in) vec3 x))
+     ((declare () vec3 t)
+      (assign (constant bool (1)) (swiz x (var_ref t)) (expression float sign (swiz x (var_ref x))))
+      (assign (constant bool (1)) (swiz y (var_ref t)) (expression float sign (swiz y (var_ref x))))
+      (assign (constant bool (1)) (swiz z (var_ref t)) (expression float sign (swiz z (var_ref x))))
+      (return (var_ref t))))
+
+   (signature vec4
+     (parameters
+       (declare (in) vec4 x))
+     ((declare () vec4 t)
+      (assign (constant bool (1)) (swiz x (var_ref t)) (expression float sign (swiz x (var_ref x))))
+      (assign (constant bool (1)) (swiz y (var_ref t)) (expression float sign (swiz y (var_ref x))))
+      (assign (constant bool (1)) (swiz z (var_ref t)) (expression float sign (swiz z (var_ref x))))
+      (assign (constant bool (1)) (swiz w (var_ref t)) (expression float sign (swiz w (var_ref x))))
+      (return (var_ref t))))
+))
+
diff --git a/builtins/130/sign b/builtins/130/sign
new file mode 100644
index 00000000000..0bdc0e09d25
--- /dev/null
+++ b/builtins/130/sign
@@ -0,0 +1,34 @@
+((function sign
+   (signature int
+     (parameters
+       (declare (in) int x))
+     ((return (expression int / (var_ref x) (expression int abs (var_ref x))))))
+
+   (signature ivec2
+     (parameters
+       (declare (in) ivec2 x))
+     ((declare () ivec2 t)
+      (assign (constant bool (1)) (swiz x (var_ref t)) (expression int sign (swiz x (var_ref x))))
+      (assign (constant bool (1)) (swiz y (var_ref t)) (expression int sign (swiz y (var_ref x))))
+      (return (var_ref t))))
+
+   (signature ivec3
+     (parameters
+       (declare (in) ivec3 x))
+     ((declare () ivec3 t)
+      (assign (constant bool (1)) (swiz x (var_ref t)) (expression int sign (swiz x (var_ref x))))
+      (assign (constant bool (1)) (swiz y (var_ref t)) (expression int sign (swiz y (var_ref x))))
+      (assign (constant bool (1)) (swiz z (var_ref t)) (expression int sign (swiz z (var_ref x))))
+      (return (var_ref t))))
+
+   (signature ivec4
+     (parameters
+       (declare (in) ivec4 x))
+     ((declare () ivec4 t)
+      (assign (constant bool (1)) (swiz x (var_ref t)) (expression int sign (swiz x (var_ref x))))
+      (assign (constant bool (1)) (swiz y (var_ref t)) (expression int sign (swiz y (var_ref x))))
+      (assign (constant bool (1)) (swiz z (var_ref t)) (expression int sign (swiz z (var_ref x))))
+      (assign (constant bool (1)) (swiz w (var_ref t)) (expression int sign (swiz w (var_ref x))))
+      (return (var_ref t))))
+))
+