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

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>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Chris Forbes <chrisf@ijw.co.nz>
Cc: mesa-stable@lists.freedesktop.org
i965/fs: Set force_uncompressed and force_sechalf on samplepos setup.

gen8_fs_generator uses these to decide whether to set the execution size
to 8 or 16, so we incorrectly made both of these MOVs the full width in
SIMD16 shaders.  (It happened to work out on Gen4-7.)

Setting them should also help inform optimization passes what's really
going on, which could help avoid bugs.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Chris Forbes <chrisf@ijw.co.nz>
Cc: mesa-stable@lists.freedesktop.org
i965/fs: Use WE_all for gl_SampleID header register munging.

This code should execute without regard to the currently executing
channels.  Asking for gl_SampleID inside control flow might break in
strange ways.  It appears to break even at the top of the program in
SIMD16 mode occasionally as well.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Chris Forbes <chrisf@ijw.co.nz>
Cc: mesa-stable@lists.freedesktop.org
i965: Don't copy propagate abs into Broadwell logic instructions.

It's not clear what abs on logical instructions means on Broadwell, and
it doesn't appear to do anything sensible.

Fixes 270 Piglit tests (the bitand/bitor/bitxor tests with abs).

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=81157
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Cc: "10.2" <mesa-stable@lists.freedesktop.org>
ilo: update and tailor the surface format table

Recreate the table from scratch with the help of a pdf-table-to-csv converter.
Switch to a form that is more suitable for ilo.
ilo: add some missing formats

Map more pipe formats to hardware formats.  Enable more VB formats on Haswell.
Revert "i965: Implement GL_PRIMITIVES_GENERATED with non-zero streams."

This reverts commit 3178d2474ae5bdd1102fb3d76a60d1d63c961ff5.

This caused GPU hangs on Ivybridge for some users and huge (80%)
performance regressions across the board on multiple platforms.

We need to find a better solution.  I've made several attempts, but none
of them have worked yet.  In the meantime, we should revert this.

Reverting it breaks GL_PRIMITIVES_GENERATED for non-zero streams, but
that's okay, since we don't expose GL_ARB_gpu_shader5 yet.

Fixes Piglit's EXT_transform_feedback/generatemipmap prims_generated
test case on Haswell.
glsl: Make the tree rebalancer bail on matrix operands.

It doesn't handle things like (vector * matrix) correctly, and
apparently Matt's intention was to bail.

Fixes shader compilation in Natural Selection 2.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
glsl: Guard against error_type in the tree rebalancer.

This helped me track down the bug fixed in the previous commit.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
glsl: Make the tree rebalancer use vector_elements, not components().

components() includes matrix columns, so if this code encountered a
matrix, it would ask for something like a vec9 or vec16.  This is
clearly not what you want.

Earlier code now prevents this from seeing matrices, but we should still
use vector_elements, for clarity.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>