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i965: Set execution size to 8 for instructions with force_sechalf set.

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Both inst->force_uncompressed and inst->force_sechalf mean that the
generated instruction should be uncompressed and have an execution size
of 8.  We don't require the visitor to set both flags - setting
inst->force_sechalf by itself is supposed to be enough.

On Gen4-7, guess_execution_size() demoted instructions to 8-wide based
on the default compression state.  On Gen8+, we instead set a default
execution size, which worked great...except that we forgot to check
inst->force_sechalf when deciding whether to use 8 or 16.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Cc: mesa-stable@lists.freedesktop.org
(cherry picked from commit 1c62126612752f6eedb66f705cc3ff1e11beea5d)
This commit is contained in:
Kenneth Graunke 2014-07-10 17:49:36 -07:00 • committed by Carl Worth
parent d389a863f2
commit cb04294b42
1 changed files with 1 additions and 1 deletions
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src/mesa/drivers/dri/i965/gen8_fs_generator.cpp
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@ -973,7 +973,7 @@ gen8_fs_generator::generate_code(exec_list *instructions)
default_state.mask_control = ir->force_writemask_all;
default_state.flag_subreg_nr = ir->flag_subreg;
if (dispatch_width == 16 && !ir->force_uncompressed)
if (dispatch_width == 16 && !ir->force_uncompressed && !ir->force_sechalf)
default_state.exec_size = BRW_EXECUTE_16;
else
default_state.exec_size = BRW_EXECUTE_8;