i965: Add 2x MSAA support to Broadwell fast clear code.

According to the cited documentation section (but in the newer docs),
x_scaledown is the same for 2x and 4x MSAA.

+47 piglits.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=83081
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Cc: "10.3" <mesa-stable@lists.freedesktop.org>
i965/vec4: inline generate_vec4_instruction() within generate_code()

Suggested by Matt. This patch combines and moves back the code-generation
functions from generate_vec4_instruction() into generate_code(). Makes
generate_code() a bit larger, but helps us to count loops in a
straightforward manner.

Reviewed-by: Matt Turner <mattst88@gmail.com>
Signed-off-by: Abdiel Janulgue <abdiel.janulgue@linux.intel.com>
i965/vec4/fs: Count loops in shader debug

Reviewed-by: Matt Turner <mattst88@gmail.com>
Signed-off-by: Abdiel Janulgue <abdiel.janulgue@linux.intel.com>
glsl: Add ir_unop_saturate

Signed-off-by: Abdiel Janulgue <abdiel.janulgue@linux.intel.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
glsl: Add constant evaluation of ir_unop_saturate

v2: Use CLAMP macro (Ian Romanick)

Signed-off-by: Abdiel Janulgue <abdiel.janulgue@linux.intel.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
glsl: Add a pass to lower ir_unop_saturate to clamp(x, 0, 1)

Signed-off-by: Abdiel Janulgue <abdiel.janulgue@linux.intel.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
ir_to_mesa, glsl_to_tgsi: lower ir_unop_saturate

Needed when vertex programs doesn't allow saturate

Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Signed-off-by: Abdiel Janulgue <abdiel.janulgue@linux.intel.com>
ir_to_mesa, glsl_to_tgsi: Add support for ir_unop_saturate

Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Signed-off-by: Abdiel Janulgue <abdiel.janulgue@linux.intel.com>
i965/fs: Add support for ir_unop_saturate

Reviewed-by: Matt Turner <mattst88@gmail.com>
Signed-off-by: Abdiel Janulgue <abdiel.janulgue@linux.intel.com>
yi965/vec4: Add support for ir_unop_saturate

Reviewed-by: Matt Turner <mattst88@gmail.com>
Signed-off-by: Abdiel Janulgue <abdiel.janulgue@linux.intel.com>
glsl: Implement saturate as ir_unop_saturate

Now that we have the ir_unop_saturate implemented as a single
instruction, generate the correct simplified expression.

Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Signed-off-by: Abdiel Janulgue <abdiel.janulgue@linux.intel.com>
glsl: Optimize clamp(x, 0, 1) as saturate(x)

v2: - Check that the base type is float (Ian Romanick)
v3: - Make sure comments reflect that we are doing a commutative operation
    - Add missing condition where the inner constant is 1.0 and outer constant is 0.0
    - Make indexing of operands easier to read (Matt Turner)

Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Signed-off-by: Abdiel Janulgue <abdiel.janulgue@linux.intel.com>
glsl: Optimize clamp(x, 0.0, b), where b < 1.0 as min(saturate(x),b)

v2: - Output min(saturate(x),b) instead of saturate(min(x,b)) suggested by Ilia Mirkin
    - Make sure we do component-wise comparison for vectors (Ian Romanick)
v3: - Add missing condition where the outer constant value is zero and
      inner constant is < 1
    - Fix comments to reflect we are doing a commutative operation (Matt Turner)

Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Signed-off-by: Abdiel Janulgue <abdiel.janulgue@linux.intel.com>
glsl: Optimize clamp(x, b, 1.0), where b > 0.0 as max(saturate(x),b)

v2: - Output max(saturate(x),b) instead of saturate(max(x,b))
    - Make sure we do component-wise comparison for vectors (Ian Romanick)
v3: - Add missing condition where the outer constant value is > 0.0 and
      inner constant is 1.0.
    - Fix comments to show that the optimization is a commutative operation
      (Matt Turner)

Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Signed-off-by: Abdiel Janulgue <abdiel.janulgue@linux.intel.com>
i965/fs: Allow propagation of instructions with saturate flag to sel

When sel conditon is bounded within 0 and 1.0. This allows code as:
	mov.sat a b
	sel.ge  dst a 0.25F

To be propagated as:
	sel.ge.sat dst b 0.25F

v3: Syntax clarifications in inst->saturate assignment (Matt Turner)

Reviewed-by: Matt Turner <mattst88@gmail.com>
Signed-off-by: Abdiel Janulgue <abdiel.janulgue@linux.intel.com>
i965/vec4: Allow propagation of instructions with saturate flag to sel

When sel conditon is bounded within 0 and 1.0. This allows code as:
        mov.sat a b
        sel.ge  dst a 0.25F

To be propagated as:
        sel.ge.sat dst b 0.25F

v3: - Syntax clarifications in inst->saturate assignment
    - Remove extra parenthesis when assigning src_reg value
      from copy_entry (Matt Turner)
v4: - Take channels into consideration when propagating saturated instructions.

Reviewed-by: Matt Turner <mattst88@gmail.com>
Signed-off-by: Abdiel Janulgue <abdiel.janulgue@linux.intel.com>
ir_to_mesa, glsl_to_tgsi: Remove try_emit_saturate

Now that saturate is implemented natively as instruction,
we can cut down on unneeded functionality.

Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Signed-off-by: Abdiel Janulgue <abdiel.janulgue@linux.intel.com>
i965/fs: Refactor try_emit_saturate

v3: Since the fs backend can emit saturate as a separate instruction, there is
    no need to detect for min/max instructions and to rewrite the instruction tree
    accordingly. On the other hand, we don't need to emit a separate saturated
    mov either when the expression generating src can do saturate directly.
v4: Add can_do_saturate() check before enabling saturate modifer (Ken)

Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Signed-off-by: Abdiel Janulgue <abdiel.janulgue@linux.intel.com>
i965/vec4: Remove try_emit_saturate

Now that saturate is implemented natively as an instruction,
we can cut down on unneeded functionality.

Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Signed-off-by: Abdiel Janulgue <abdiel.janulgue@linux.intel.com>
mesa: fix make tarballs

Current method of generating distribution tar-balls involves manually
invoking make + target name in the appropriate places. This temporary
solution is used until we get 'make dist' working.

Currently it does not work, as in order to have the target (which is
also a filename) available in the final Makefile we need to add a PHONY
target + use the correct target name.

Cc: "10.2 10.3" <mesa-stable@lists.freedesktop.org>
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>