+void
+vec4_generator::generate_gs_ff_sync_set_primitives(struct brw_reg dst,
+ struct brw_reg src0,
+ struct brw_reg src1,
+ struct brw_reg src2)
+{
+ brw_push_insn_state(p);
+ brw_set_default_access_mode(p, BRW_ALIGN_1);
+ /* Save src0 data in 16:31 bits of dst.0 */
+ brw_AND(p, suboffset(vec1(dst), 0), suboffset(vec1(src0), 0),
+ brw_imm_ud(0xffffu));
+ brw_SHL(p, suboffset(vec1(dst), 0), suboffset(vec1(dst), 0), brw_imm_ud(16));
+ /* Save src1 data in 0:15 bits of dst.0 */
+ brw_AND(p, suboffset(vec1(src2), 0), suboffset(vec1(src1), 0),
+ brw_imm_ud(0xffffu));
+ brw_OR(p, suboffset(vec1(dst), 0),
+ suboffset(vec1(dst), 0),
+ suboffset(vec1(src2), 0));
+ brw_pop_insn_state(p);
+}
+
+void
+vec4_generator::generate_gs_ff_sync(vec4_instruction *inst,
+ struct brw_reg dst,
+ struct brw_reg src0,
+ struct brw_reg src1)
+{
+ /* This opcode uses an implied MRF register for:
+ * - the header of the ff_sync message. And as such it is expected to be
+ * initialized to r0 before calling here.
+ * - the destination where we will write the allocated URB handle.
+ */
+ struct brw_reg header =
+ retype(brw_message_reg(inst->base_mrf), BRW_REGISTER_TYPE_UD);
+
+ /* Overwrite dword 0 of the header (SO vertices to write) and
+ * dword 1 (number of primitives written).
+ */
+ brw_push_insn_state(p);
+ brw_set_default_mask_control(p, BRW_MASK_DISABLE);
+ brw_set_default_access_mode(p, BRW_ALIGN_1);
+ brw_MOV(p, get_element_ud(header, 0), get_element_ud(src1, 0));
+ brw_MOV(p, get_element_ud(header, 1), get_element_ud(src0, 0));
+ brw_pop_insn_state(p);
+
+ /* Allocate URB handle in dst */
+ brw_ff_sync(p,
+ dst,
+ 0,
+ header,
+ 1, /* allocate */
+ 1, /* response length */
+ 0 /* eot */);
+
+ /* Now put allocated urb handle in header.0 */
+ brw_push_insn_state(p);
+ brw_set_default_access_mode(p, BRW_ALIGN_1);
+ brw_set_default_mask_control(p, BRW_MASK_DISABLE);
+ brw_MOV(p, get_element_ud(header, 0), get_element_ud(dst, 0));
+
+ /* src1 is not an immediate when we use transform feedback */
+ if (src1.file != BRW_IMMEDIATE_VALUE)
+ brw_MOV(p, brw_vec4_grf(src1.nr, 0), brw_vec4_grf(dst.nr, 1));
+
+ brw_pop_insn_state(p);
+}
+
+void
+vec4_generator::generate_gs_set_primitive_id(struct brw_reg dst)
+{
+ /* In gen6, PrimitiveID is delivered in R0.1 of the payload */
+ struct brw_reg src = brw_vec8_grf(0, 0);
+ brw_push_insn_state(p);
+ brw_set_default_mask_control(p, BRW_MASK_DISABLE);
+ brw_set_default_access_mode(p, BRW_ALIGN_1);
+ brw_MOV(p, get_element_ud(dst, 0), get_element_ud(src, 1));
+ brw_pop_insn_state(p);
+}
+