Mesa (master): i965: Clear some undefined fields of g0 when using them for gen6 FB writes.
Eric Anholt
anholt at kemper.freedesktop.org
Tue Oct 26 21:12:23 UTC 2010
Module: Mesa
Branch: master
Commit: 0e8c834ffa2f6d943a927e1a32a273d2f8600694
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=0e8c834ffa2f6d943a927e1a32a273d2f8600694
Author: Eric Anholt <eric at anholt.net>
Date: Tue Oct 26 10:31:08 2010 -0700
i965: Clear some undefined fields of g0 when using them for gen6 FB writes.
This doesn't appear to help any testcases I'm looking at, but it looks
like it's required.
---
src/mesa/drivers/dri/i965/brw_fs.cpp | 14 ++++++++++++++
1 files changed, 14 insertions(+), 0 deletions(-)
diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp b/src/mesa/drivers/dri/i965/brw_fs.cpp
index c687fde..fc30ffc 100644
--- a/src/mesa/drivers/dri/i965/brw_fs.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs.cpp
@@ -1961,6 +1961,20 @@ fs_visitor::generate_fb_write(fs_inst *inst)
brw_MOV(p,
brw_message_reg(inst->base_mrf),
brw_vec8_grf(0, 0));
+
+ if (inst->target > 0) {
+ /* Set the render target index for choosing BLEND_STATE. */
+ brw_MOV(p, retype(brw_vec1_reg(BRW_MESSAGE_REGISTER_FILE, 0, 2),
+ BRW_REGISTER_TYPE_UD),
+ brw_imm_ud(inst->target));
+ }
+
+ /* Clear viewport index, render target array index. */
+ brw_AND(p, retype(brw_vec1_reg(BRW_MESSAGE_REGISTER_FILE, 0, 0),
+ BRW_REGISTER_TYPE_UD),
+ retype(brw_vec1_grf(0, 0), BRW_REGISTER_TYPE_UD),
+ brw_imm_ud(0xf7ff));
+
implied_header = brw_null_reg();
} else {
implied_header = retype(brw_vec8_grf(0, 0), BRW_REGISTER_TYPE_UW);
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