From a019dd0d6e5bba00e8ee7818e004ee42ca507102 Mon Sep 17 00:00:00 2001 From: Kenneth Graunke Date: Sun, 3 Apr 2011 00:57:30 -0700 Subject: [PATCH] i965: Fix null register use in Sandybridge implied move resolution. Fixes regressions caused by commit 9a21bc6401, namely GPU hangs when running gnome-shell or compiz (Mesa bugs #35820 and #35853). I incorrectly refactored the case that dealt with ARF_NULL; even in that case, the source register needs to be changed to the MRF. NOTE: This is a candidate for the 7.10 branch (if 9a21bc6401 is cherry-picked, take this one too). --- src/mesa/drivers/dri/i965/brw_eu_emit.c | 17 ++++++++--------- 1 file changed, 8 insertions(+), 9 deletions(-) diff --git a/src/mesa/drivers/dri/i965/brw_eu_emit.c b/src/mesa/drivers/dri/i965/brw_eu_emit.c index 32ee37f..57313a5 100644 --- a/src/mesa/drivers/dri/i965/brw_eu_emit.c +++ b/src/mesa/drivers/dri/i965/brw_eu_emit.c @@ -68,15 +68,14 @@ gen6_resolve_implied_move(struct brw_compile *p, if (intel->gen != 6) return; - if (src->file == BRW_ARCHITECTURE_REGISTER_FILE && src->nr == BRW_ARF_NULL) - return; - - brw_push_insn_state(p); - brw_set_mask_control(p, BRW_MASK_DISABLE); - brw_set_compression_control(p, BRW_COMPRESSION_NONE); - brw_MOV(p, retype(brw_message_reg(msg_reg_nr), BRW_REGISTER_TYPE_UD), - retype(*src, BRW_REGISTER_TYPE_UD)); - brw_pop_insn_state(p); + if (src->file != BRW_ARCHITECTURE_REGISTER_FILE || src->nr != BRW_ARF_NULL) { + brw_push_insn_state(p); + brw_set_mask_control(p, BRW_MASK_DISABLE); + brw_set_compression_control(p, BRW_COMPRESSION_NONE); + brw_MOV(p, retype(brw_message_reg(msg_reg_nr), BRW_REGISTER_TYPE_UD), + retype(*src, BRW_REGISTER_TYPE_UD)); + brw_pop_insn_state(p); + } *src = brw_message_reg(msg_reg_nr); } -- 2.7.4