This will be used to implement the barrier function.
Signed-off-by: Jordan Justen <jordan.l.jus...@intel.com>
Reviewed-by: Chris Forbes <chr...@ijw.co.nz>
---
src/mesa/drivers/dri/i965/brw_eu.h | 2 ++
src/mesa/drivers/dri/i965/brw_eu_emit.c | 23 +++++++++++++++++++++++
2 files changed, 25 insertions(+)
diff --git a/src/mesa/drivers/dri/i965/brw_eu.h
b/src/mesa/drivers/dri/i965/brw_eu.h
index f8fd155..5e86591 100644
--- a/src/mesa/drivers/dri/i965/brw_eu.h
+++ b/src/mesa/drivers/dri/i965/brw_eu.h
@@ -360,6 +360,8 @@ brw_jump_scale(const struct brw_context *brw)
return 1;
}
+void brw_wait(struct brw_compile *p);
+
/* If/else/endif. Works by manipulating the execution flags on each
* channel.
*/
diff --git a/src/mesa/drivers/dri/i965/brw_eu_emit.c
b/src/mesa/drivers/dri/i965/brw_eu_emit.c
index 1fe9e7b..d9572b5 100644
--- a/src/mesa/drivers/dri/i965/brw_eu_emit.c
+++ b/src/mesa/drivers/dri/i965/brw_eu_emit.c
@@ -2950,3 +2950,26 @@ void brw_shader_time_add(struct brw_compile *p,
0 /* response length */,
false /* header present */);
}
+
+
+/**
+ * Emit the wait instruction for a barrier
+ */
+void
+brw_wait(struct brw_compile *p)
+{
+ struct brw_context *brw = p->brw;
+ struct brw_inst *insn;
+
+ assert(brw->gen >= 7);
+
+ struct brw_reg src = brw_notification_reg();
+
+ insn = next_insn(p, BRW_OPCODE_WAIT);
+ brw_set_dest(p, insn, brw_null_reg());
+ brw_set_src0(p, insn, src);
+ brw_set_src1(p, insn, brw_null_reg());
+
+ brw_inst_set_exec_size(p->brw, insn, BRW_EXECUTE_1);
+ brw_inst_set_mask_control(brw, insn, BRW_MASK_DISABLE);
+}
--
2.1.4
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