From 1245babe0c69846d227a78a11429584433e77a9e Mon Sep 17 00:00:00 2001
From: Eric Anholt <eric@anholt.net>
Date: Tue, 20 Jul 2010 12:22:37 -0700
Subject: glsl2: Fix asin() implementation.

I'd flipped around the order of two operations in paren-balancing
adventures, and left out the multiply by sign(x) required for negative x.

Fixes:
glsl1-acos(vec4) function
glsl1-asin(vec4) function
glsl1-atan(vec4) function
---
 src/glsl/builtins/110/asin | 130 ++++++++++++++++++++++++---------------------
 1 file changed, 69 insertions(+), 61 deletions(-)

(limited to 'src/glsl/builtins')

diff --git a/src/glsl/builtins/110/asin b/src/glsl/builtins/110/asin
index fe93337bff..d26bde364b 100644
--- a/src/glsl/builtins/110/asin
+++ b/src/glsl/builtins/110/asin
@@ -3,90 +3,98 @@
      (parameters
        (declare (in) float x))
      ((return (expression float *
-     	       (expression float -
-	        (expression float *
+	       (expression float sign (var_ref x))
+	       (expression float -
+		(expression float *
 		 (constant float (3.1415926))
 		 (constant float (0.5)))
-		(expression float sqrt
-		 (expression float -
-		  (constant float (1.0))
-		  (expression float abs (var_ref x)))))
-     	       (expression float +
-     	        (constant float (1.5707288))
-	        (expression float *
-     	         (expression float abs (var_ref x))
-     	         (expression float +
-	          (constant float (-0.2121144))
-     	          (expression float *
-     	           (constant float (0.0742610))
-	           (expression float abs (var_ref x))))))))))
+		(expression float *
+		 (expression float sqrt
+		  (expression float -
+		   (constant float (1.0))
+		   (expression float abs (var_ref x))))
+		 (expression float +
+		  (constant float (1.5707288))
+		  (expression float *
+		   (expression float abs (var_ref x))
+		   (expression float +
+		    (constant float (-0.2121144))
+		    (expression float *
+		     (constant float (0.0742610))
+		     (expression float abs (var_ref x))))))))))))
 
    (signature vec2
      (parameters
        (declare (in) vec2 x))
      ((return (expression vec2 *
-     	       (expression float -
-	        (expression float *
+	       (expression vec2 sign (var_ref x))
+	       (expression vec2 -
+		(expression float *
 		 (constant float (3.1415926))
 		 (constant float (0.5)))
-		(expression vec2 sqrt
-		 (expression vec2 -
-		  (constant float (1.0))
-		  (expression vec2 abs (var_ref x)))))
-     	       (expression vec2 +
-     	        (constant float (1.5707288))
-	        (expression vec2 *
-     	         (expression vec2 abs (var_ref x))
-     	         (expression vec2 +
-	          (constant float (-0.2121144))
-     	          (expression vec2 *
-     	           (constant float (0.0742610))
-	           (expression vec2 abs (var_ref x))))))))))
+		(expression vec2 *
+		 (expression vec2 sqrt
+		  (expression vec2 -
+		   (constant float (1.0))
+		   (expression vec2 abs (var_ref x))))
+		 (expression vec2 +
+		  (constant float (1.5707288))
+		  (expression vec2 *
+		   (expression vec2 abs (var_ref x))
+		   (expression vec2 +
+		    (constant float (-0.2121144))
+		    (expression vec2 *
+		     (constant float (0.0742610))
+		     (expression vec2 abs (var_ref x))))))))))))
 
    (signature vec3
      (parameters
        (declare (in) vec3 x))
      ((return (expression vec3 *
-     	       (expression vec3 -
-	        (expression float *
+	       (expression vec3 sign (var_ref x))
+	       (expression vec3 -
+		(expression float *
 		 (constant float (3.1415926))
 		 (constant float (0.5)))
-		(expression vec3 sqrt
-		 (expression vec3 -
-		  (constant float (1.0))
-		  (expression vec3 abs (var_ref x)))))
-     	       (expression vec3 +
-     	        (constant float (1.5707288))
-	        (expression vec3 *
-     	         (expression vec3 abs (var_ref x))
-     	         (expression vec3 +
-	          (constant float (-0.2121144))
-     	          (expression vec3 *
-     	           (constant float (0.0742610))
-	           (expression vec3 abs (var_ref x))))))))))
+		(expression vec3 *
+		 (expression vec3 sqrt
+		  (expression vec3 -
+		   (constant float (1.0))
+		   (expression vec3 abs (var_ref x))))
+		 (expression vec3 +
+		  (constant float (1.5707288))
+		  (expression vec3 *
+		   (expression vec3 abs (var_ref x))
+		   (expression vec3 +
+		    (constant float (-0.2121144))
+		    (expression vec3 *
+		     (constant float (0.0742610))
+		     (expression vec3 abs (var_ref x))))))))))))
 
    (signature vec4
      (parameters
        (declare (in) vec4 x))
      ((return (expression vec4 *
-     	       (expression vec4 -
-	        (expression float *
+	       (expression vec4 sign (var_ref x))
+	       (expression vec4 -
+		(expression float *
 		 (constant float (3.1415926))
 		 (constant float (0.5)))
-		(expression vec4 sqrt
-		 (expression vec4 -
-		  (constant float (1.0))
-		  (expression vec4 abs (var_ref x)))))
-     	       (expression vec4 +
-     	        (constant float (1.5707288))
-	        (expression vec4 *
-     	         (expression vec4 abs (var_ref x))
-     	         (expression vec4 +
-	          (constant float (-0.2121144))
-     	          (expression vec4 *
-     	           (constant float (0.0742610))
-	           (expression vec4 abs (var_ref x))))))))))
-)
+		(expression vec4 *
+		 (expression vec4 sqrt
+		  (expression vec4 -
+		   (constant float (1.0))
+		   (expression vec4 abs (var_ref x))))
+		 (expression vec4 +
+		  (constant float (1.5707288))
+		  (expression vec4 *
+		   (expression vec4 abs (var_ref x))
+		   (expression vec4 +
+		    (constant float (-0.2121144))
+		    (expression vec4 *
+		     (constant float (0.0742610))
+		     (expression vec4 abs (var_ref x)))))))))))
+))
 
  (function acos
    (signature float
-- 
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