i965: Remove traces of nonexistent TAN math function.

Never existed? At least never supported. Doesn't appear in 965, G45,
or ILK documentation.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
i965: Remove strange comments about math functions.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
i965: fix SURFACE_STATE dumping

Wrong fields were used when dumping width and height.

Reviewed-by: Eric Anholt <eric@anholt.net>
i965/gen7: fix 3DSTATE_LINE_STIPPLE_PATTERN

The inverse repeat count should taks up bits 31:15 and is in U1.16.  Fixes
the "Restarting lines within a single Begin/End block" subtest of piglit
linestipple, and gets the other failing subtests much closer to passing.

v2: Rewrite commit message with more detailed piglit info (by anholt)

Reviewed-by: Eric Anholt <eric@anholt.net>
i965/gen7: fix encoding of (huge) surface size for BRW_SURFACE_BUFFER

Unlike GEN6, the bits of entry count are distributed like this

  width  = (entry_count & 0x0000007f);       /* bits [6:0] */
  height = (entry_count & 0x001fff80) >> 7;  /* bits [20:7] */
  depth  = (entry_count & 0x7fe00000) >> 21; /* bits [30:21] */

The maximum entry count is still limited to 2^27.

This was noted while going over the PRM.  No test is impacted, because
1<<20 (the bit that moved) is much larger than GL_UNIFORM_BLOCK_MAX_SIZE,
GL_MAX_TEXTURE_BUFFER_SIZE, or MAX_*_UNIFORM_COMPONENTS.

v2: Explain more in the commit message (by anholt)

Reviewed-by: Eric Anholt <eric@anholt.net>
r600g: use CP DMA for buffer clears on evergreen+

Lighter weight then using streamout.  Only evergreen
and newer asics support embedded data as src with
CP DMA.

Reviewed-by: Jerome Glisse <jglisse@redhat.com>
Reviewed-by: Marek Olšák <maraeo@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
radeon/llvm: Fix segfault with a specifc libelf implementation

The libelf implementation that is distributed here:
http://www.mr511.de/software/english.html
requires calling elf_version() prior to calling elf_memory()

Tested-by: Michel Dänzer <michel.daenzer@amd.com>
freedreno: set SWAP bit based on format

Really this should be set based on buffer format, not on color vs
depth/stencil.  Probably there should be more formats that set the bit
as we add support for more render target formats.

Signed-off-by: Rob Clark <robclark@freedesktop.org>
freedreno: implement fd_screen_destroy()

Opps, didn't notice that I had left it stubbed out.

Also, make things fail a bit more gracefully when things go wrong.

Signed-off-by: Rob Clark <robclark@freedesktop.org>
freedreno: use u_math macros/helpers more

Get rid of a few self-defined macros:
  ALIGN() -> align()
  min() -> MIN2()
  max() -> MAX2()

Signed-off-by: Rob Clark <robclark@freedesktop.org>
freedreno: add noop driver

It is useful for debugging.

Signed-off-by: Rob Clark <robclark@freedesktop.org>
freedreno: fix temp register usage

The previous approach of using the dst register as an intermediate
temporary doesn't work in a lot of cases.  For example, if the dst
register is the same as one of the src registers.

For now, just simplify it and always allocate a new register to use as
an intermediate.  In some cases this will result in more registers used
than required.  I think the best solution would be to implement an
optimization pass to reduce the number of registers used, which would
also solve the problem we have now of not being able to use GPRs that
are assigned for TGSI_FILE_INPUT.

Signed-off-by: Rob Clark <robclark@freedesktop.org>
freedreno: fix texture fetch type

There is a bit we need to set for 2D vs 3D fetch, to tell the hw whether
there are two or there valid input components.

Signed-off-by: Rob Clark <robclark@freedesktop.org>
freedreno: clear fixes and debugging

Set a few extra registers to make sure we are in proper state for
clearing.  And also add some debug options to mark all state dirty in
clear and gmem operations to aid in debugging.

Signed-off-by: Rob Clark <robclark@freedesktop.org>
freedreno: fix bogus IMM const reg index

We were assigning incorrect const register for immediates, and
potentially writing immediate const to the wrong location.  This fixes
an incorrect-rendering bug with xonotic.

Signed-off-by: Rob Clark <robclark@freedesktop.org>
i965: report correct sample positions

From low to high bits, the sample positions are packed y0,x0,y1,x1...

Fixes arb_texture_multisample-sample-position piglit.

Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>
Reviewed-by: Paul Berry <stereotype441@gmail.com>
mesa: fix bogus comment about PrimitiveRestart fields

Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>
Reviewed-by: Eric Anholt <eric@anholt.net>
scons: Remove redundant code.

-fvisibility=hidden is already elsewhere for the whole tree.
util/u_sse: Fix _mm_shuffle_epi8 prototype for clang.

Clang does not support __artificial__. Instead match precisely what's
in the clang headers.
scons: Support clang.

clang is supports most gcc options / extensions, with a some exceptions.

The biggest advantage of using clang is that compilation times are much
short.

One can tell scons to use clang when building by invoking it as

   CC=clang CXX=clang++ scons libgl-xlib