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-rw-r--r--src/mesa/drivers/dri/i965/brw_fs_schedule_instructions.cpp15
1 files changed, 15 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_fs_schedule_instructions.cpp b/src/mesa/drivers/dri/i965/brw_fs_schedule_instructions.cpp
index 00aa99de7f..c8f0b27b76 100644
--- a/src/mesa/drivers/dri/i965/brw_fs_schedule_instructions.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs_schedule_instructions.cpp
@@ -438,6 +438,21 @@ instruction_scheduler::schedule_instructions(fs_inst *next_block_header)
instructions.push_tail(child);
}
}
+
+ /* Shared resource: the mathbox. There's one per EU (on later
+ * generations, it's even more limited pre-gen6), so if we send
+ * something off to it then the next math isn't going to make
+ * progress until the first is done.
+ */
+ if (chosen->inst->is_math()) {
+ foreach_iter(exec_list_iterator, iter, instructions) {
+ schedule_node *n = (schedule_node *)iter.get();
+
+ if (n->inst->is_math())
+ n->unblocked_time = MAX2(n->unblocked_time,
+ time + chosen->latency);
+ }
+ }
}
assert(instructions_to_schedule == 0);