Re: [Mesa-dev] [PATCH 2/6] i965/sched: write-after-read dependencies are free

2015-10-21 Thread Jason Ekstrand
On Fri, Oct 2, 2015 at 2:37 PM, Connor Abbott wrote: > Although write-after-write dependencies have the same latency as > read-after-write dependencies due to how the register scoreboard works, > write-after-read dependencies aren't checked by the EU at all, so > they're purely a constraint on how

[Mesa-dev] [PATCH 2/6] i965/sched: write-after-read dependencies are free

2015-10-02 Thread Connor Abbott
Although write-after-write dependencies have the same latency as read-after-write dependencies due to how the register scoreboard works, write-after-read dependencies aren't checked by the EU at all, so they're purely a constraint on how the scheduler can order the instructions. Signed-off-by: Con