On Fri, Feb 6, 2015 at 6:42 AM, Francisco Jerez <curroje...@riseup.net> wrote:
> Fixes rewrite by the register coalesce pass of references to
> individual halves of 16-wide coalesced registers.
> ---
> src/mesa/drivers/dri/i965/brw_fs_register_coalesce.cpp | 8 ++++++--
> 1 file changed, 6 insertions(+), 2 deletions(-)
>
> diff --git a/src/mesa/drivers/dri/i965/brw_fs_register_coalesce.cpp
> b/src/mesa/drivers/dri/i965/brw_fs_register_coalesce.cpp
> index 09f0fad..2a26a46 100644
> --- a/src/mesa/drivers/dri/i965/brw_fs_register_coalesce.cpp
> +++ b/src/mesa/drivers/dri/i965/brw_fs_register_coalesce.cpp
> @@ -211,9 +211,13 @@ fs_visitor::register_coalesce()
> continue;
> }
> reg_to_offset[offset] = inst->dst.reg_offset;
> - if (inst->src[0].width == 16)
> - reg_to_offset[offset + 1] = inst->dst.reg_offset + 1;
> mov[offset] = inst;
> +
> + if (inst->exec_size * type_sz(inst->src[0].type) > REG_SIZE) {
> + reg_to_offset[offset + 1] = inst->dst.reg_offset + 1;
> + mov[offset + 1] = inst;
> + }
> +
> channels_remaining -= inst->regs_written;
> }
>
> --
> 2.1.3
I can believe it. It would help me to understand if we had an example
of a sequence of instructions that this code didn't handle properly.
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