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iris: Don't check VF address high bits when there is no buffer.

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If there is no buffer, then it doesn't matter.  Leave the old stale
high bits in place (for next time) and don't bother invalidating.

Cuts 5.6% of the flushes in the Civilization VI demo on Kabylake GT2.
This commit is contained in:
Kenneth Graunke 2019-06-20 00:47:33 -05:00
parent ecc500398f
commit db8f57a5cb
1 changed files with 1 additions and 1 deletions
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2
src/gallium/drivers/iris/iris_blorp.c
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@ -212,7 +212,7 @@ blorp_vf_invalidate_for_vb_48b_transitions(struct blorp_batch *blorp_batch,
struct iris_bo *bo = addrs[i].buffer;
uint16_t high_bits = bo ? bo->gtt_offset >> 32u : 0;
if (high_bits != ice->state.last_vbo_high_bits[i]) {
if (bo && high_bits != ice->state.last_vbo_high_bits[i]) {
need_invalidate = true;
ice->state.last_vbo_high_bits[i] = high_bits;
}