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i965/fs: Gen4: Zero out extra coordinates when using shadow compare

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Fixes broken rendering if these MRFs contained anything other than zero.

NOTE: This is a candidate for stable branches.
Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Chris Forbes 2013-08-27 19:35:49 +12:00
parent 4cc692e355
commit f35dea05b1
1 changed files with 7 additions and 1 deletions
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8
src/mesa/drivers/dri/i965/brw_fs_visitor.cpp
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@ -876,7 +876,13 @@ fs_visitor::emit_texture_gen4(ir_texture *ir, fs_reg dst, fs_reg coordinate,
emit(MOV(fs_reg(MRF, base_mrf + mlen + i), coordinate));
coordinate.reg_offset++;
}
/* gen4's SIMD8 sampler always has the slots for u,v,r present. */
/* gen4's SIMD8 sampler always has the slots for u,v,r present.
* the unused slots must be zeroed.
*/
for (int i = ir->coordinate->type->vector_elements; i < 3; i++) {
emit(MOV(fs_reg(MRF, base_mrf + mlen + i), fs_reg(0.0f)));
}
mlen += 3;
if (ir->op == ir_tex) {