From 72c914805b8b3b37bf8f44d94bc25ca3d146ac66 Mon Sep 17 00:00:00 2001 From: Keith Packard Date: Sat, 1 Nov 2008 14:38:19 -0700 Subject: Fix for 58dc8b7: dest regions must not use HorzStride 0 in ExecSize 1 Quoting section 11.3.10, paragraph 10.2 of the 965PRM: 10.2. If ExecSize is 1, dst.HorzStride must not be 0. Note that this is relaxed from rule 10.1.2. Also note that this rule for destination horizontal stride is different from that for source as stated in rule #7. GM45 gets very angry when rule 10.2 is violated. Patch 58dc8b7 (i965: support destination horiz strides in align1 access mode) added support for additional horizontal strides in the ExecSize 1 case, but failed to notice that mesa occasionally re-purposes a register as a temporary destination, even though it was constructed as a repeating source with HorzStride = 0. While, ideally, we should probably fix the code using these register specifications, this patch simply rewrites them to use HorzStride 1 as the pre-58dc8b7 code did. Signed-off-by: Keith Packard --- src/mesa/drivers/dri/i965/brw_eu_emit.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/src/mesa/drivers/dri/i965/brw_eu_emit.c b/src/mesa/drivers/dri/i965/brw_eu_emit.c index 460521615c6..58d97465d11 100644 --- a/src/mesa/drivers/dri/i965/brw_eu_emit.c +++ b/src/mesa/drivers/dri/i965/brw_eu_emit.c @@ -64,6 +64,8 @@ static void brw_set_dest( struct brw_instruction *insn, if (insn->header.access_mode == BRW_ALIGN_1) { insn->bits1.da1.dest_subreg_nr = dest.subnr; + if (dest.hstride == BRW_HORIZONTAL_STRIDE_0) + dest.hstride = BRW_HORIZONTAL_STRIDE_1; insn->bits1.da1.dest_horiz_stride = dest.hstride; } else { @@ -78,6 +80,8 @@ static void brw_set_dest( struct brw_instruction *insn, */ if (insn->header.access_mode == BRW_ALIGN_1) { insn->bits1.ia1.dest_indirect_offset = dest.dw1.bits.indirect_offset; + if (dest.hstride == BRW_HORIZONTAL_STRIDE_0) + dest.hstride = BRW_HORIZONTAL_STRIDE_1; insn->bits1.ia1.dest_horiz_stride = dest.hstride; } else { -- cgit v1.2.3