[Mesa-dev] [PATCH 01/19] i965/vp: Remove more code for unused opcodes.
eric at anholt.net
Wed Oct 10 11:03:00 PDT 2012
Brian Paul <brianp at vmware.com> writes:
> On 10/09/2012 07:06 PM, Eric Anholt wrote:
>> These don't appear in ARB_vp or NV_vp and I missed that fact on the first
>> pass of removing dead opcodes.
> I'd have expected that LRP would be generated by GLSL's mix()
> function, but it looks like it's not. DX9 has LRP instructions. Do
> any GPUs directly support that opcode?
gen7 actually does have a LRP instruction, but this chunk of code is
only used for ARB_vps and fixed function (brw_vec4_* handles GLSL).
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