From: Paul Berry <stereotype...@gmail.com>
This message must be sent to the "thread spawner" unit.
Reviewed-by: Jordan Justen <jordan.l.jus...@intel.com>
---
src/mesa/drivers/dri/i965/brw_eu.h | 4 +++
src/mesa/drivers/dri/i965/brw_eu_emit.c | 46 +++++++++++++++++++++++++++++++++
2 files changed, 50 insertions(+)
diff --git a/src/mesa/drivers/dri/i965/brw_eu.h
b/src/mesa/drivers/dri/i965/brw_eu.h
index d9ad5bd..708c216 100644
--- a/src/mesa/drivers/dri/i965/brw_eu.h
+++ b/src/mesa/drivers/dri/i965/brw_eu.h
@@ -349,6 +349,10 @@ brw_jump_scale(const struct brw_context *brw)
return 1;
}
+void brw_cs_terminate(struct brw_compile *p,
+ unsigned msg_reg_nr,
+ struct brw_reg src0);
+
/* 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 43e5783..9c166a3 100644
--- a/src/mesa/drivers/dri/i965/brw_eu_emit.c
+++ b/src/mesa/drivers/dri/i965/brw_eu_emit.c
@@ -2895,3 +2895,49 @@ void brw_shader_time_add(struct brw_compile *p,
0 /* response length */,
false /* header present */);
}
+
+
+static void
+brw_set_cs_terminate_message(struct brw_context *brw,
+ struct brw_compile *p,
+ struct brw_inst *insn)
+{
+ /* Terminate a compute shader by sending a message to the thread spawner.
+ * Note that even though the thread has a URB resource associated with it,
+ * we set the "do not dereference URB" bit, because the URB resource is
+ * managed by the fixed-function unit, so it will free it automatically.
+ */
+ brw_set_message_descriptor(p, insn, BRW_SFID_THREAD_SPAWNER,
+ 1 /* msg_length */,
+ 0 /* response_length */,
+ false /* header_present */,
+ true /* end_of_thread */);
+ brw_inst_set_ts_opcode(brw, insn, 0); /* Dereference resource */
+ brw_inst_set_ts_request_type(brw, insn, 0); /* Root thread */
+ brw_inst_set_ts_resource_select(brw, insn, 1); /* Do not dereference URB */
+}
+
+
+/**
+ * Emit the SEND message to terminate a compute shader.
+ */
+void
+brw_cs_terminate(struct brw_compile *p,
+ unsigned msg_reg_nr,
+ struct brw_reg src0)
+{
+ struct brw_context *brw = p->brw;
+ struct brw_inst *insn;
+
+ gen6_resolve_implied_move(p, &src0, msg_reg_nr);
+ insn = next_insn(p, BRW_OPCODE_SEND);
+ brw_set_dest(p, insn, brw_null_reg());
+ brw_set_src0(p, insn, src0);
+ brw_set_src1(p, insn, brw_imm_d(0));
+
+ if (brw->gen < 6)
+ brw_inst_set_cond_modifier(brw, insn, msg_reg_nr);
+
+ brw_set_cs_terminate_message(brw, p, insn);
+ brw_inst_set_mask_control(brw, insn, BRW_MASK_DISABLE);
+}
--
2.1.4
_______________________________________________
mesa-dev mailing list
mesa-dev@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/mesa-dev
