This will be used to implement the Gateway Barrier SEND needed to implement
the barrier function.
v2:
* notify => gateway_notify (Ken)
* combine short lines of brw_barrier proto/decl (mattst88)
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 | 30 ++++++++++++++++++++++++++++++
2 files changed, 32 insertions(+)
diff --git a/src/mesa/drivers/dri/i965/brw_eu.h
b/src/mesa/drivers/dri/i965/brw_eu.h
index fe80c8b..55e639e 100644
--- a/src/mesa/drivers/dri/i965/brw_eu.h
+++ b/src/mesa/drivers/dri/i965/brw_eu.h
@@ -361,6 +361,8 @@ brw_jump_scale(const struct brw_device_info *devinfo)
return 1;
}
+void brw_barrier(struct brw_codegen *p, struct brw_reg src);
+
/* 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 d7f9710..3e1303f 100644
--- a/src/mesa/drivers/dri/i965/brw_eu_emit.c
+++ b/src/mesa/drivers/dri/i965/brw_eu_emit.c
@@ -2953,6 +2953,36 @@ void brw_shader_time_add(struct brw_codegen *p,
/**
+ * Emit the SEND message for a barrier
+ */
+void
+brw_barrier(struct brw_codegen *p, struct brw_reg src)
+{
+ const struct brw_device_info *devinfo = p->devinfo;
+ struct brw_inst *inst;
+
+ assert(devinfo->gen >= 7);
+
+ inst = next_insn(p, BRW_OPCODE_SEND);
+ brw_set_dest(p, inst, brw_null_reg());
+ brw_set_src0(p, inst, src);
+ brw_set_src1(p, inst, brw_null_reg());
+
+ brw_set_message_descriptor(p, inst, BRW_SFID_MESSAGE_GATEWAY,
+ 1 /* msg_length */,
+ 0 /* response_length */,
+ false /* header_present */,
+ false /* end_of_thread */);
+
+ brw_inst_set_gateway_notify(devinfo, inst, 1);
+ brw_inst_set_gateway_subfuncid(devinfo, inst,
+ BRW_MESSAGE_GATEWAY_SFID_BARRIER_MSG);
+
+ brw_inst_set_mask_control(devinfo, inst, BRW_MASK_DISABLE);
+}
+
+
+/**
* Emit the wait instruction for a barrier
*/
void
--
2.1.4
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