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author | Matt Turner <mattst88@gmail.com> | 2013-08-08 13:50:01 -0700 |
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committer | Ian Romanick <ian.d.romanick@intel.com> | 2013-08-21 21:11:51 -0700 |
commit | f0bc10679e1d1fa8009c8facd7a3ee87053fb27b (patch) | |
tree | ed4c30b0c9e15157e65bb1102274f5dbc87db420 /src/mesa/drivers/dri/i965/brw_vec4_copy_propagation.cpp | |
parent | 3f438bfa4c795856d39da79959830483d0b8d362 (diff) |
i965: Emit MOVs for neg/abs.
Necessary to avoid combining a bitcast and a modifier into a single
operation. Otherwise if safe, the MOV should be removed by
copy-propagation or register coalescing.
With this and the next patch, there are only four changes in shader-db:
all a single extra instruction. The code does something like
mov a.w, -b.x
and copy propagation doesn't work because it only handles no-op
swizzles. Seems acceptable, given the known limitation of our copy
propagation.
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Paul Berry <stereoytpe441@gmail.com>
(cherry picked from commit 0ae9ca12a887a5aca47edc2a6a99eac4235bf4b0)
Diffstat (limited to 'src/mesa/drivers/dri/i965/brw_vec4_copy_propagation.cpp')
0 files changed, 0 insertions, 0 deletions