diff options
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_fs.cpp | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp b/src/mesa/drivers/dri/i965/brw_fs.cpp index b2701b89689..3414d92efde 100644 --- a/src/mesa/drivers/dri/i965/brw_fs.cpp +++ b/src/mesa/drivers/dri/i965/brw_fs.cpp @@ -2658,6 +2658,16 @@ fs_visitor::opt_sampler_eot() if (unlikely(tex_inst->is_head_sentinel()) || !tex_inst->is_tex()) return false; + /* This optimisation doesn't seem to work for textureGather for some + * reason. I can't find any documentation or known workarounds to indicate + * that this is expected, but considering that it is probably pretty + * unlikely that a shader would directly write out the results from + * textureGather we might as well just disable it. + */ + if (tex_inst->opcode == SHADER_OPCODE_TG4 || + tex_inst->opcode == SHADER_OPCODE_TG4_OFFSET) + return false; + /* If there's no header present, we need to munge the LOAD_PAYLOAD as well. * It's very likely to be the previous instruction. */ |