diff options
| author | Zhenyu Wang <zhenyuw@linux.intel.com> | 2010-06-25 16:05:24 +0800 |
|---|---|---|
| committer | Eric Anholt <eric@anholt.net> | 2010-07-08 12:50:53 -0700 |
| commit | 20be3ff57670529a410b30a1008a71e768d08428 (patch) | |
| tree | f109775f8056a760217840e1bddc003e6b16afe1 /src/mesa/drivers/dri/i965/brw_eu_emit.c | |
| parent | a3cc7585eae1dd7aa1f2257e787c784672f49831 (diff) | |
i965: Add 'wait' instruction support
When EU executes 'wait' instruction, it stalls and sets notification
register state. Host can issue MMIO write to clear notification
register state to allow EU continue on executing again.
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Diffstat (limited to 'src/mesa/drivers/dri/i965/brw_eu_emit.c')
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_eu_emit.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_eu_emit.c b/src/mesa/drivers/dri/i965/brw_eu_emit.c index 34dfe10cb9..10e9ebc3b0 100644 --- a/src/mesa/drivers/dri/i965/brw_eu_emit.c +++ b/src/mesa/drivers/dri/i965/brw_eu_emit.c @@ -906,6 +906,20 @@ void brw_CMP(struct brw_compile *p, } } +/* Issue 'wait' instruction for n1, host could program MMIO + to wake up thread. */ +void brw_WAIT (struct brw_compile *p) +{ + struct brw_instruction *insn = next_insn(p, BRW_OPCODE_WAIT); + struct brw_reg src = brw_notification_1_reg(); + + brw_set_dest(insn, src); + brw_set_src0(insn, src); + brw_set_src1(insn, brw_null_reg()); + insn->header.execution_size = 0; /* must */ + insn->header.predicate_control = 0; + insn->header.compression_control = 0; +} /*********************************************************************** |