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glsl: Improve documentation of ir_loop counter/control fields.

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Reviewed-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Paul Berry 2013-11-27 11:39:51 -08:00
parent a810db7b84
commit af9af2965b
1 changed files with 28 additions and 6 deletions
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34
src/glsl/ir.h
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@ -1032,13 +1032,33 @@ public:
* If \c from and \c to are the same value, the loop will execute once.
*/
/*@{*/
ir_rvalue *from; /** Value of the loop counter on the first
* iteration of the loop.
*/
ir_rvalue *to; /** Value of the loop counter on the last
* iteration of the loop.
*/
/**
* Value which should be assigned to \c counter before the first iteration
* of the loop. Must be non-null whenever \c counter is non-null, and vice
* versa.
*/
ir_rvalue *from;
/**
* Value which \c counter should be compared to in order to determine
* whether to exit the loop. Must be non-null whenever \c counter is
* non-null, and vice versa.
*/
ir_rvalue *to;
/**
* Value which should be added to \c counter at the end of each loop
* iteration. Must be non-null whenever \c counter is non-null, and vice
* versa.
*/
ir_rvalue *increment;
/**
* Variable which counts loop iterations. This is a brand new ir_variable
* declaration (not a reference to a previously declared ir_variable, as in
* ir_dereference_variable).
*/
ir_variable *counter;
/**
@ -1047,6 +1067,8 @@ public:
* If any of the loop control fields are non-\c NULL, this field must be
* one of \c ir_binop_less, \c ir_binop_greater, \c ir_binop_lequal,
* \c ir_binop_gequal, \c ir_binop_equal, or \c ir_binop_nequal.
*
* Ignored if \c counter is NULL.
*/
int cmp;
/*@}*/