diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_fs_builder.h | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_fs_builder.h b/src/mesa/drivers/dri/i965/brw_fs_builder.h index df10a9de293..f121f3463d3 100644 --- a/src/mesa/drivers/dri/i965/brw_fs_builder.h +++ b/src/mesa/drivers/dri/i965/brw_fs_builder.h @@ -390,14 +390,21 @@ namespace brw { src_reg emit_uniformize(const src_reg &src) const { + /* FIXME: We use a vector chan_index and dst to allow constant and + * copy propagration to move result all the way into the consuming + * instruction (typically a surface index or sampler index for a + * send). This uses 1 or 3 extra hw registers in 16 or 32 wide + * dispatch. Once we teach const/copy propagation about scalars we + * should go back to scalar destinations here. + */ const fs_builder ubld = exec_all(); - const dst_reg chan_index = component(vgrf(BRW_REGISTER_TYPE_UD), 0); - const dst_reg dst = component(vgrf(src.type), 0); + const dst_reg chan_index = vgrf(BRW_REGISTER_TYPE_UD); + const dst_reg dst = vgrf(src.type); ubld.emit(SHADER_OPCODE_FIND_LIVE_CHANNEL, chan_index); - ubld.emit(SHADER_OPCODE_BROADCAST, dst, src, chan_index); + ubld.emit(SHADER_OPCODE_BROADCAST, dst, src, component(chan_index, 0)); - return src_reg(dst); + return src_reg(component(dst, 0)); } /** |