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i965: Don't emit SURFACE_STATEs for gather workarounds on Broadwell.

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As far as I can tell, Broadwell doesn't need any of the SURFACE_STATE
workarounds for textureGather() bugs, so there's no need to emit
a second set of identical copies.

To keep things simple, just point the gather surface index base to the
same place as the texture surface index base.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Chris Forbes <chrisf@ijw.co.nz>
Cc: "10.2" <mesa-stable@lists.freedesktop.org>
This commit is contained in:
Kenneth Graunke 2014-05-29 00:06:08 -07:00
parent 2442d3553f
commit f6a99d1167
2 changed files with 15 additions and 8 deletions
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9
src/mesa/drivers/dri/i965/brw_shader.cpp
View file

@ -763,8 +763,13 @@ backend_visitor::assign_common_binding_table_offsets(uint32_t next_binding_table
}
if (prog->UsesGather) {
stage_prog_data->binding_table.gather_texture_start = next_binding_table_offset;
next_binding_table_offset += num_textures;
if (brw->gen >= 8) {
stage_prog_data->binding_table.gather_texture_start =
stage_prog_data->binding_table.texture_start;
} else {
stage_prog_data->binding_table.gather_texture_start = next_binding_table_offset;
next_binding_table_offset += num_textures;
}
} else {
stage_prog_data->binding_table.gather_texture_start = 0xd0d0d0d0;
}

14
src/mesa/drivers/dri/i965/brw_wm_surface_state.c
View file

@ -829,12 +829,14 @@ brw_update_texture_surfaces(struct brw_context *brw)
/* emit alternate set of surface state for gather. this
* allows the surface format to be overriden for only the
* gather4 messages. */
if (vs && vs->UsesGather)
update_stage_texture_surfaces(brw, vs, &brw->vs.base, true);
if (gs && gs->UsesGather)
update_stage_texture_surfaces(brw, gs, &brw->gs.base, true);
if (fs && fs->UsesGather)
update_stage_texture_surfaces(brw, fs, &brw->wm.base, true);
if (brw->gen < 8) {
if (vs && vs->UsesGather)
update_stage_texture_surfaces(brw, vs, &brw->vs.base, true);
if (gs && gs->UsesGather)
update_stage_texture_surfaces(brw, gs, &brw->gs.base, true);
if (fs && fs->UsesGather)
update_stage_texture_surfaces(brw, fs, &brw->wm.base, true);
}
brw->state.dirty.brw |= BRW_NEW_SURFACES;
}