The ADD(diff, diff, fs_reg(-2u)) instruction reads diff, which is a width 1 register. We need to read it as <0,1,0> with a subreg of 0, which is what smear accomplishes.
Fixes assertion: brw_eu_emit.c:285: validate_reg: Assertion `hstride == 0' failed. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=86974 Signed-off-by: Kenneth Graunke <kenn...@whitecape.org> Cc: mesa-sta...@lists.freedesktop.org --- src/mesa/drivers/dri/i965/brw_fs.cpp | 1 + 1 file changed, 1 insertion(+) diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp b/src/mesa/drivers/dri/i965/brw_fs.cpp index 45a5793..db8affa 100644 --- a/src/mesa/drivers/dri/i965/brw_fs.cpp +++ b/src/mesa/drivers/dri/i965/brw_fs.cpp @@ -765,6 +765,7 @@ fs_visitor::emit_shader_time_end() fs_reg start = shader_start_time; start.negate = true; fs_reg diff = fs_reg(GRF, alloc.allocate(1), BRW_REGISTER_TYPE_UD, 1); + diff.set_smear(0); fs_inst *add = ADD(diff, start, shader_end_time); add->force_writemask_all = true; emit(add); -- 2.2.2 _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev