i965/vec4: Only zero out unused message components when there are any.
Otherwise, coordinates with four components would result in a MOV with a destination writemask that has no channels enabled: mov(8) g115<1>.F 0D { align16 WE_normal NoDDChk 1Q }; At best, this is stupid: we emit code that shouldn't do anything. Worse, it apparently causes GPU hangs (observable with Chris's textureGather test on CubeArrays.) Signed-off-by: Kenneth Graunke <kenneth@whitecape.org> Reviewed-by: Chris Forbes <chrisf@ijw.co.nz> Reviewed-by: Ian Romanick <idr@freedesktop.org> Cc: mesa-stable@lists.freedesktop.org
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@ -2248,8 +2248,10 @@ vec4_visitor::visit(ir_texture *ir)
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emit(MOV(dst_reg(MRF, param_base, ir->coordinate->type, coord_mask),
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coordinate));
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}
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emit(MOV(dst_reg(MRF, param_base, ir->coordinate->type, zero_mask),
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src_reg(0)));
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if (zero_mask != 0) {
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emit(MOV(dst_reg(MRF, param_base, ir->coordinate->type, zero_mask),
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src_reg(0)));
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}
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/* Load the shadow comparitor */
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if (ir->shadow_comparitor && ir->op != ir_txd) {
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emit(MOV(dst_reg(MRF, param_base + 1, ir->shadow_comparitor->type,
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