diff options
| author | Kenneth Graunke <[email protected]> | 2014-08-10 16:15:51 -0700 |
|---|---|---|
| committer | Kenneth Graunke <[email protected]> | 2014-08-12 13:39:25 -0700 |
| commit | efc818e3a4dae5634b6296412771c995c156228e (patch) | |
| tree | 698a091e3793802b0440325599f3a225b7a7e67f /src/mesa/drivers | |
| parent | 2e180e4c09ef40c3c85a5f5e26ba673028326e73 (diff) | |
i965/fs: Don't set flag_subreg_nr = 1 on predicated FB write setup.
On Haswell, we implement "discard" via predicated SEND messages, using
f0.1 instead of f0.0. To accomplish this, we set inst->flag_subreg to 1
on the FS_OPCODE_FB_WRITE.
Most instructions using fs_inst::flag_subreg expand to a single assembly
instruction. However, FS_OPCODE_FB_WRITE can generate several MOVs for
setting up header information. We don't want to set flag_subreg on
those, so override the default state back to 0.
Signed-off-by: Kenneth Graunke <[email protected]>
Reviewed-by: Matt Turner <[email protected]>
Reviewed-by: Chris Forbes <[email protected]>
Diffstat (limited to 'src/mesa/drivers')
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_fs_generator.cpp | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_fs_generator.cpp b/src/mesa/drivers/dri/i965/brw_fs_generator.cpp index d3509a0f1de..208b54f7fdd 100644 --- a/src/mesa/drivers/dri/i965/brw_fs_generator.cpp +++ b/src/mesa/drivers/dri/i965/brw_fs_generator.cpp @@ -154,6 +154,7 @@ fs_generator::generate_fb_write(fs_inst *inst) brw_set_default_mask_control(p, BRW_MASK_DISABLE); brw_set_default_predicate_control(p, BRW_PREDICATE_NONE); brw_set_default_compression_control(p, BRW_COMPRESSION_NONE); + brw_set_default_flag_reg(p, 0, 0); /* On HSW, the GPU will use the predicate on SENDC, unless the header is * present. |