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glsl: Reimplement the "cross" built-in without ir_binop_cross.

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We are not aware of any GPU that actually implements the cross product
as a single instruction.  Hence, there's no need for it to be an opcode.
Future commits will remove it entirely.
This commit is contained in:
Kenneth Graunke 2010-11-17 13:20:30 -08:00
parent 302fe4049c
commit 671ccf593e
1 changed files with 5 additions and 3 deletions
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8
src/glsl/builtins/ir/cross
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@ -1,7 +1,9 @@
((function cross
(signature vec3
(parameters
(declare (in) vec3 arg0)
(declare (in) vec3 arg1))
((return (expression vec3 cross (var_ref arg0) (var_ref arg1)))))
(declare (in) vec3 a)
(declare (in) vec3 b))
((return (expression vec3 -
(expression vec3 * (swiz yzx (var_ref a)) (swiz zxy (var_ref b)))
(expression vec3 * (swiz zxy (var_ref a)) (swiz yzx (var_ref b)))))))
))