src/glsl/builtins/ir/atan.ir

   1 ((function atan
   2    (signature float
   3      (parameters
   4        (declare (in) float y_over_x))
   5      ((declare () float s)
   6       (call asin (var_ref s)
   7                           ((expression float *
   8                            (var_ref y_over_x)
   9                            (expression float rsq
  10                             (expression float +
  11                              (expression float *
  12                               (var_ref y_over_x)
  13                               (var_ref y_over_x))
  14                              (constant float (1.0)))))))
  15       (return (var_ref s))))
  16
  17    (signature vec2
  18      (parameters
  19        (declare (in) vec2 y_over_x))
  20      ((declare () vec2 s)
  21       (call asin (var_ref s)
  22                           ((expression vec2 *
  23                            (var_ref y_over_x)
  24                            (expression vec2 rsq
  25                             (expression vec2 +
  26                              (expression vec2 *
  27                               (var_ref y_over_x)
  28                               (var_ref y_over_x))
  29                              (constant float (1.0)))))))
  30       (return (var_ref s))))
  31
  32    (signature vec3
  33      (parameters
  34        (declare (in) vec3 y_over_x))
  35      ((declare () vec3 s)
  36       (call asin (var_ref s)
  37                           ((expression vec3 *
  38                            (var_ref y_over_x)
  39                            (expression vec3 rsq
  40                             (expression vec3 +
  41                              (expression vec3 *
  42                               (var_ref y_over_x)
  43                               (var_ref y_over_x))
  44                              (constant float (1.0)))))))
  45       (return (var_ref s))))
  46
  47    (signature vec4
  48      (parameters
  49        (declare (in) vec4 y_over_x))
  50      ((declare () vec4 s)
  51       (call asin (var_ref s)
  52                           ((expression vec4 *
  53                            (var_ref y_over_x)
  54                            (expression vec4 rsq
  55                             (expression vec4 +
  56                              (expression vec4 *
  57                               (var_ref y_over_x)
  58                               (var_ref y_over_x))
  59                              (constant float (1.0)))))))
  60       (return (var_ref s))))
  61
  62   (signature float
  63     (parameters
  64       (declare (in ) float y)
  65       (declare (in ) float x)
  66     )
  67     (
  68       (declare () float r)
  69       (if (expression bool >
  70            (expression float abs (var_ref x))
  71            (expression float * (constant float (1.0e-8)) (expression float abs (var_ref y)))) (
  72         (call atan (var_ref r) ((expression float / (var_ref y) (var_ref x))))
  73         (if (expression bool < (var_ref x) (constant float (0.000000)) ) (
  74           (if (expression bool >= (var_ref y) (constant float (0.000000)) )
  75               ((assign (x) (var_ref r) (expression float + (var_ref r) (constant float (3.141593)))))
  76               ((assign (x) (var_ref r) (expression float - (var_ref r) (constant float (3.141593))))))
  77         )
  78         (
  79         ))
  80       )
  81       (
  82         (declare () float sgn)
  83         (assign (x) (var_ref sgn) (expression float sign (var_ref y)))
  84         (assign (x) (var_ref r) (expression float * (var_ref sgn) (constant float (1.5707965))))
  85       ))
  86
  87       (return (var_ref r) )
  88     ))
  89
  90
  91
  92    (signature vec2
  93      (parameters
  94        (declare (in) vec2 y)
  95        (declare (in) vec2 x))
  96      ((declare () vec2 r)
  97       (declare () float temp)
  98       (call atan (var_ref temp) ((swiz x (var_ref y)) (swiz x (var_ref x))))
  99       (assign (x) (var_ref r) (var_ref temp))
 100       (call atan (var_ref temp) ((swiz y (var_ref y)) (swiz y (var_ref x))))
 101       (assign (y) (var_ref r) (var_ref temp))
 102       (return (var_ref r))))
 103
 104    (signature vec3
 105      (parameters
 106        (declare (in) vec3 y)
 107        (declare (in) vec3 x))
 108      ((declare () vec3 r)
 109       (declare () float temp)
 110       (call atan (var_ref temp) ((swiz x (var_ref y)) (swiz x (var_ref x))))
 111       (assign (x) (var_ref r) (var_ref temp))
 112       (call atan (var_ref temp) ((swiz y (var_ref y)) (swiz y (var_ref x))))
 113       (assign (y) (var_ref r) (var_ref temp))
 114       (call atan (var_ref temp) ((swiz z (var_ref y)) (swiz z (var_ref x))))
 115       (assign (z) (var_ref r) (var_ref temp))
 116       (return (var_ref r))))
 117
 118    (signature vec4
 119      (parameters
 120        (declare (in) vec4 y)
 121        (declare (in) vec4 x))
 122      ((declare () vec4 r)
 123       (declare () float temp)
 124       (call atan (var_ref temp) ((swiz x (var_ref y)) (swiz x (var_ref x))))
 125       (assign (x) (var_ref r) (var_ref temp))
 126       (call atan (var_ref temp) ((swiz y (var_ref y)) (swiz y (var_ref x))))
 127       (assign (y) (var_ref r) (var_ref temp))
 128       (call atan (var_ref temp) ((swiz z (var_ref y)) (swiz z (var_ref x))))
 129       (assign (z) (var_ref r) (var_ref temp))
 130       (call atan (var_ref temp) ((swiz w (var_ref y)) (swiz w (var_ref x))))
 131       (assign (w) (var_ref r) (var_ref temp))
 132       (return (var_ref r))))
 133
 134 ))