Bug 29047

Summary:	[r300g] Unknown opcode DDX with RV350
Product:	Mesa	Reporter:	Chris Rankin <rankincj>
Component:	Drivers/DRI/r300	Assignee:	Default DRI bug account <dri-devel>
Status:	RESOLVED WONTFIX	QA Contact:
Severity:	normal
Priority:	medium
Version:	git
Hardware:	x86 (IA32)
OS:	Linux (All)
Whiteboard:
i915 platform:		i915 features:

Description Chris Rankin 2010-07-13 12:43:13 UTC

Output from piglit's glsl-derivs program:

r300 FP: Compiler Error:
r300_fragprog_emit.c::translate_rgb_opcode(): translate_rgb_opcode: Unknown opcode DDX
Using a dummy shader instead.
If there's an 'unknown opcode' message, please file a bug report and attach this log.
Probe at (205,125)
  Expected: 0.800000 0.400000 0.000000
  Observed: 0.000000 0.000000 0.000000

And similarly for glsl-deriv-varyings.

Comment 1 Marek Olšák 2010-07-13 13:45:30 UTC

Unfortunately, this is a hardware limitation and fixing it is impossible. If you really want this opcode, I recommend using a software rasterizer like llvmpipe. Really, there is nothing we can do.

Comment 2 Roland Scheidegger 2010-07-13 18:53:19 UTC

I dunno, maybe should output a bit different message for opcodes known to be impossible to implement? That would make it more obvious it's really a hardware limitation and not a driver bug.

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