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This currently doesn't include fixing up the cliptests in the assembly
paths to support ARB_depth_clamp, so enabling depth_clamp forces the C path.
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Fix a bug reported in 2003 :-)
The output vector has 4 entries, not 3.
Unconditionally emit .register directives.
Signed-off-by: David S. Miller <davem@davemloft.net>
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Stop using register %g7 since that is used by the "system" (ie. the
pthread implementation makes use of it).
Also, the projection vector can be NULL and we shouldn't try to access
it at all in _mesa_sparc_cliptest_points4_np(). ioquake3 would crash
due to this bug.
Finally, unconditionally emit the register directives and re-enable in
_mesa_init_all_sparc_transform_asm().
Signed-off-by: David S. Miller <davem@davemloft.net>
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This rewrites the sparc GLAPI code so that it's PIC friendly and works
with all of the TLS/PTHREADS/64-bit/32-bit combinations properly.
As a result we can turn SPARC asm back on. Currently it's only
enabled on Linux, as that's the only place where I can test this
stuff out.
For the moment the cliptest SPARC asm routines are disabled as they
are non-working. The problem is that they use register %g7 as a
temporary which is where the threading libraries store the thread
pointer on SPARC. I will fix that code up in a future change as it's
a pretty important routine to optimize.
Like x86 we do the runtime patch as a pthread once-invoked initializer
in init_glapi_relocs().
Unlike x86, however, our GLAPI stubs on SPARC are just two instruction
sequences that branch to a trampoline and put the GLAPI offset into a
register. The trampoline is what we run-time patch. The stubs thus
all look like:
glFoo:
ba __glapi_sparc_foo_stub
sethi GLAPI_OFFSET(glFOO) * PTR_SIZE, %g3
This actually makes generate_entrypoint() a lot simpler on SPARC. For
this case in generate_entrypoint() we generate stubs using a 'call'
instead of the 'ba' above to make sure it can reach.
In order to get a proper tail call going here, in the unpatched case,
we do several tricks. To get the current PC, for example, we save the
return address register into a temporary, do a call, save the return
address register written by the call to another temporary, then
restore the original return address register value. This is to
avoid having to allocate a stack frame.
This is necessary for PIC address formation.
This new GLAPI scheme lets us get rid of the ugly SPARC GLAPI hacks in
__glXInitialize() and one_time_init().
Signed-off-by: David S. Miller <davem@davemloft.net>
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Eliminate a couple of differences with gallium-0.2
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A couple places attempted to call _math_test_all_*_functions when
DEBUG was defined. These routines only exist when DEBUG_MATH is
defined.
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- The test for whether or not we're building for 64-bit is '#ifdef __arch64__'.
This appears to be correct on both Linux and Solaris.
- The test for Solaris is now '#if defined(SVR4) || defined(__SVR4) ||
defined(__svr4__)'. GCC 3.4.0 has all three defined on Solaris 9.
- Enables assembly language clip routines.
- Fixes to make GLSL code build on Solaris.
- Update gl_SPARC_asm.py.
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in SPARC glapi optimizations by moving the icache
flush into the glapi_sparc.S file.
Brian, how is this?
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