configure: Cygwin requires _XOPEN_SOURCE >= 700 to prototype strndup()

Adjust definition of _XOPEN_SOURCE appropriately for use of strndup() added with
commit da3a47d6

Signed-off-by: Jon TURNEY <jon.turney@dronecode.org.uk>
mesa: fix crash in st/mesa after deleting a VAO

This happens when glGetMultisamplefv (or any other non-draw function) is
called, which doesn't invoke the VBO module to update _DrawArrays and
the pointer is invalid at that point.

However st/mesa still dereferences it to setup vertex buffers ==> crash.

Reviewed-by: Brian Paul <brianp@vmware.com>
st/mesa: fix samplerCubeShadow with bias

It has 5 coordinates: (x,y,z,depth,lodbias)

Cc: mesa-stable@lists.freedesktop.org
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
radeonsi: fix samplerCubeShadow with bias

Pack the depth value before overwriting it with cube coordinates.

Cc: mesa-stable@lists.freedesktop.org
radeonsi: fix texture fetches with derivatives for 1DArray and 3D textures
radeonsi: properly implement texture opcodes that take an offset

Instead of using intr_name in lp_build_tgsi_action, this selects the names
with a switch statement in the emit function. This allows emitting
llvm.SI.sample for instructions without offsets and llvm.SI.image.sample.*.o
otherwise.

This depends on my LLVM changes.

When LLVM 3.5 is released, I'll switch all texture instructions to the new
intrinsics.
radeonsi: switch descriptors to i32 vectors

This is a follow-up to the commit which adds texture fetches with offsets.

Reviewed-by: Tom Stellard <thomas.stellard@amd.com>
radeonsi: rename definitions of shader limits

Reviewed-by: Tom Stellard <thomas.stellard@amd.com>
allow builtin functions to require parameters to be shader inputs

The new interpolateAt* builtins have strange restrictions on the
<interpolant> parameter.

- It must be a shader input, or an element of a shader input array.
- It must not include a swizzle.

V2: Don't abuse ir_var_mode_shader_in for this; make a new flag.

Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
glsl: add new expression types for interpolateAt*

Will be used to implement interpolateAt*() from ARB_gpu_shader5

Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
glsl: add new interpolateAt* builtin functions

V2: - Don't assume everyone wants interpolateAtSample() lowered to
      interpolateAtOffset. It turns out this isn't what we want most
      of the time for i965. Lowering can be added later in an ir pass
      which drivers opt into, rather than bolting it straight into the
      builtin definition.
    - Only expose the interpolateAt* builtins in the fragment language.

Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
i965: Fix two broken asserts in brw_eu_emit

These were looking in the wrong field.

Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>
Reviewed-by: Matt Turner <mattst88@gmail.com>
i965: Avoid crashing while dumping vec4 insn operands

We'd otherwise go looking into virtual_grf_sizes for things that aren't
in there at all.

Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>
Reviewed-by: Matt Turner <mattst88@gmail.com>
i965/disasm: Disassemble indirect sends more properly

- Don't try to disassemble send's src1 as a descriptor if it's not an
  immediate.

- In the same case, show src1 as an operand (makes it easier to see
  bogus register regions, etc -- the hardware is very fussy)

Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>
Reviewed-by: Matt Turner <mattst88@gmail.com>