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i965: fix bogus swizzle in brw_cubemap_normalize

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When used with a cube array in VS, failed assertion in ir_validate:

   Assignment count of LHS write mask channels enabled not
   matching RHS vector size (3 LHS, 4 RHS).

To fix this, swizzle the RHS correctly for the writemask.

This showed up in the ARB_texture_gather tests, which exercise cube
arrays in the VS.

Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>
Cc: "9.2" <mesa-stable@lists.freedesktop.org>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Chris Forbes 2013-09-30 22:10:17 +13:00
parent 4e4c32ba11
commit 0d7fc10bcd
1 changed files with 6 additions and 4 deletions
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10
src/mesa/drivers/dri/i965/brw_cubemap_normalize.cpp
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@ -92,10 +92,12 @@ brw_cubemap_normalize_visitor::visit_leave(ir_texture *ir)
/* coordinate.xyz *= expr */
assign = new(mem_ctx) ir_assignment(
new(mem_ctx) ir_dereference_variable(var),
new(mem_ctx) ir_expression(ir_binop_mul,
ir->coordinate->type,
new(mem_ctx) ir_dereference_variable(var),
expr));
new(mem_ctx) ir_swizzle(
new(mem_ctx) ir_expression(ir_binop_mul,
ir->coordinate->type,
new(mem_ctx) ir_dereference_variable(var),
expr),
0, 1, 2, 0, 3));
assign->write_mask = WRITEMASK_XYZ;
base_ir->insert_before(assign);
ir->coordinate = new(mem_ctx) ir_dereference_variable(var);