diff options
Diffstat (limited to 'src/mesa/drivers/dri/i965/brw_eu_emit.c')
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_eu_emit.c | 39 |
1 files changed, 39 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 d48753c546..f6726fcfca 100644 --- a/src/mesa/drivers/dri/i965/brw_eu_emit.c +++ b/src/mesa/drivers/dri/i965/brw_eu_emit.c @@ -2390,3 +2390,42 @@ void brw_ff_sync(struct brw_compile *p, response_length, eot); } + +/** + * Emit the SEND instruction necessary to generate stream output data on Gen6 + * (for transform feedback). + * + * If send_commit_msg is true, this is the last piece of stream output data + * from this thread, so send the data as a committed write. According to the + * Sandy Bridge PRM (volume 2 part 1, section 4.5.1): + * + * "Prior to End of Thread with a URB_WRITE, the kernel must ensure all + * writes are complete by sending the final write as a committed write." + */ +void +brw_svb_write(struct brw_compile *p, + struct brw_reg dest, + GLuint msg_reg_nr, + struct brw_reg src0, + GLuint binding_table_index, + bool send_commit_msg) +{ + struct brw_instruction *insn; + + gen6_resolve_implied_move(p, &src0, msg_reg_nr); + + insn = next_insn(p, BRW_OPCODE_SEND); + brw_set_dest(p, insn, dest); + brw_set_src0(p, insn, src0); + brw_set_src1(p, insn, brw_imm_d(0)); + brw_set_dp_write_message(p, insn, + binding_table_index, + 0, /* msg_control: ignored */ + GEN6_DATAPORT_WRITE_MESSAGE_STREAMED_VB_WRITE, + 1, /* msg_length */ + true, /* header_present */ + 0, /* last_render_target: ignored */ + send_commit_msg, /* response_length */ + 0, /* end_of_thread */ + send_commit_msg); /* send_commit_msg */ +} |