From b39e6f33b60ef9bbaf81f320aaca6a440d8a6a8f Mon Sep 17 00:00:00 2001 From: Eric Anholt Date: Wed, 22 Sep 2010 11:47:03 -0700 Subject: glsl: Rework assignments with write_masks to have LHS chan count match RHS. It turns out that most people new to this IR are surprised when an assignment to (say) 3 components on the LHS takes 4 components on the RHS. It also makes for quite strange IR output: (assign (constant bool (1)) (x) (var_ref color) (swiz x (var_ref v) )) (assign (constant bool (1)) (y) (var_ref color) (swiz yy (var_ref v) )) (assign (constant bool (1)) (z) (var_ref color) (swiz zzz (var_ref v) )) But even worse, even we get it wrong, as shown by this line of our current step(float, vec4): (assign (constant bool (1)) (w) (var_ref t) (expression float b2f (expression bool >= (swiz w (var_ref x))(var_ref edge)))) where we try to assign a float to the writemasked-out x channel and don't supply anything for the actual w channel we're writing. Drivers right now just get lucky since ir_to_mesa spams the float value across all the source channels of a vec4. Instead, the RHS will now have a number of components equal to the number of components actually being written. Hopefully this confuses everyone less, and it also makes codegen for a scalar target simpler. Reviewed-by: Kenneth Graunke Reviewed-by: Ian Romanick --- src/glsl/builtins/ir/noise3 | 24 ++++++++++++------------ 1 file changed, 12 insertions(+), 12 deletions(-) (limited to 'src/glsl/builtins/ir/noise3') diff --git a/src/glsl/builtins/ir/noise3 b/src/glsl/builtins/ir/noise3 index f191e145f9..ed7ad5190f 100644 --- a/src/glsl/builtins/ir/noise3 +++ b/src/glsl/builtins/ir/noise3 @@ -11,9 +11,9 @@ (assign (constant bool (1)) (x) (var_ref b) (expression float noise (expression vec4 + (var_ref p) (constant vec4 (601.0 313.0 29.0 277.0))))) (assign (constant bool (1)) (x) (var_ref c) (expression float noise (expression vec4 + (var_ref p) (constant vec4 (1559.0 113.0 1861.0 797.0))))) - (assign (constant bool (1)) (x) (var_ref t) (swiz xxx (var_ref a))) - (assign (constant bool (1)) (y) (var_ref t) (swiz xxx (var_ref b))) - (assign (constant bool (1)) (z) (var_ref t) (swiz xxx (var_ref c))) + (assign (constant bool (1)) (x) (var_ref t) (var_ref a)) + (assign (constant bool (1)) (y) (var_ref t) (var_ref b)) + (assign (constant bool (1)) (z) (var_ref t) (var_ref c)) (return (var_ref t)) )) @@ -29,9 +29,9 @@ (assign (constant bool (1)) (x) (var_ref b) (expression float noise (expression vec3 + (var_ref p) (constant vec3 (601.0 313.0 29.0))))) (assign (constant bool (1)) (x) (var_ref c) (expression float noise (expression vec3 + (var_ref p) (constant vec3 (1559.0 113.0 1861.0))))) - (assign (constant bool (1)) (x) (var_ref t) (swiz xxx (var_ref a))) - (assign (constant bool (1)) (y) (var_ref t) (swiz xxx (var_ref b))) - (assign (constant bool (1)) (z) (var_ref t) (swiz xxx (var_ref c))) + (assign (constant bool (1)) (x) (var_ref t) (var_ref a)) + (assign (constant bool (1)) (y) (var_ref t) (var_ref b)) + (assign (constant bool (1)) (z) (var_ref t) (var_ref c)) (return (var_ref t)) )) @@ -47,9 +47,9 @@ (assign (constant bool (1)) (x) (var_ref b) (expression float noise (expression vec2 + (var_ref p) (constant vec2 (601.0 313.0))))) (assign (constant bool (1)) (x) (var_ref c) (expression float noise (expression vec2 + (var_ref p) (constant vec2 (1559.0 113.0))))) - (assign (constant bool (1)) (x) (var_ref t) (swiz xxx (var_ref a))) - (assign (constant bool (1)) (y) (var_ref t) (swiz xxx (var_ref b))) - (assign (constant bool (1)) (z) (var_ref t) (swiz xxx (var_ref c))) + (assign (constant bool (1)) (x) (var_ref t) (var_ref a)) + (assign (constant bool (1)) (y) (var_ref t) (var_ref b)) + (assign (constant bool (1)) (z) (var_ref t) (var_ref c)) (return (var_ref t)) )) @@ -65,9 +65,9 @@ (assign (constant bool (1)) (x) (var_ref b) (expression float noise (expression float + (var_ref p) (constant float (601.0))))) (assign (constant bool (1)) (x) (var_ref c) (expression float noise (expression float + (var_ref p) (constant float (1559.0))))) - (assign (constant bool (1)) (x) (var_ref t) (swiz xxx (var_ref a))) - (assign (constant bool (1)) (y) (var_ref t) (swiz xxx (var_ref b))) - (assign (constant bool (1)) (z) (var_ref t) (swiz xxx (var_ref c))) + (assign (constant bool (1)) (x) (var_ref t) (var_ref a)) + (assign (constant bool (1)) (y) (var_ref t) (var_ref b)) + (assign (constant bool (1)) (z) (var_ref t) (var_ref c)) (return (var_ref t)) )) )) -- cgit v1.2.3