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i965/fs: Skip channel expressions splitting for interpolation

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The backend will have to do a message send, so we want to keep these in
one piece, just like texture ops.

Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Chris Forbes 2013-11-17 20:07:46 +13:00
parent 6e91f2df95
commit 5ed147c26f
1 changed files with 25 additions and 0 deletions
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25
src/mesa/drivers/dri/i965/brw_fs_channel_expressions.cpp
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@ -75,6 +75,18 @@ channel_expressions_predicate(ir_instruction *ir)
if (!expr)
return false;
switch (expr->operation) {
/* these opcodes need to act on the whole vector,
* just like texturing.
*/
case ir_unop_interpolate_at_centroid:
case ir_binop_interpolate_at_offset:
case ir_binop_interpolate_at_sample:
return false;
default:
break;
}
for (i = 0; i < expr->get_num_operands(); i++) {
if (expr->operands[i]->type->is_vector())
return true;
@ -153,6 +165,16 @@ ir_channel_expressions_visitor::visit_leave(ir_assignment *ir)
if (!found_vector)
return visit_continue;
switch (expr->operation) {
case ir_unop_interpolate_at_centroid:
case ir_binop_interpolate_at_offset:
case ir_binop_interpolate_at_sample:
return visit_continue;
default:
break;
}
/* Store the expression operands in temps so we can use them
* multiple times.
*/
@ -414,6 +436,9 @@ ir_channel_expressions_visitor::visit_leave(ir_assignment *ir)
case ir_unop_unpack_half_2x16_split_x:
case ir_unop_unpack_half_2x16_split_y:
case ir_binop_pack_half_2x16_split:
case ir_unop_interpolate_at_centroid:
case ir_binop_interpolate_at_offset:
case ir_binop_interpolate_at_sample:
unreachable("not reached: expression operates on scalars only");
}