return false;
}
+ if (!(*merge & QPU_PM) &&
+ QPU_GET_FIELD(*merge, QPU_UNPACK) != QPU_UNPACK_NOP) {
+ return false;
+ }
+
if (raddr_b_b != QPU_R_NOP &&
raddr_b_b != raddr_a_a)
return false;
return true;
}
+static bool
+writes_a_file(uint64_t inst)
+{
+ if (!(inst & QPU_WS))
+ return QPU_GET_FIELD(inst, QPU_WADDR_ADD) < 32;
+ else
+ return QPU_GET_FIELD(inst, QPU_WADDR_MUL) < 32;
+}
+
+static bool
+reads_r4(uint64_t inst)
+{
+ return (QPU_GET_FIELD(inst, QPU_ADD_A) == QPU_MUX_R4 ||
+ QPU_GET_FIELD(inst, QPU_ADD_B) == QPU_MUX_R4 ||
+ QPU_GET_FIELD(inst, QPU_MUL_A) == QPU_MUX_R4 ||
+ QPU_GET_FIELD(inst, QPU_MUL_B) == QPU_MUX_R4);
+}
+
uint64_t
qpu_merge_inst(uint64_t a, uint64_t b)
{
return 0;
}
+ /* packing: Make sure that non-NOP packs agree, then deal with
+ * special-case failing of adding a non-NOP pack to something with a
+ * NOP pack.
+ */
+ if (!merge_fields(&merge, a, b, QPU_PACK_MASK, 0))
+ return 0;
+ bool new_a_pack = (QPU_GET_FIELD(a, QPU_PACK) !=
+ QPU_GET_FIELD(merge, QPU_PACK));
+ bool new_b_pack = (QPU_GET_FIELD(b, QPU_PACK) !=
+ QPU_GET_FIELD(merge, QPU_PACK));
+ if (!(merge & QPU_PM)) {
+ /* Make sure we're not going to be putting a new
+ * a-file packing on either half.
+ */
+ if (new_a_pack && writes_a_file(a))
+ return 0;
+
+ if (new_b_pack && writes_a_file(b))
+ return 0;
+ } else {
+ /* Make sure we're not going to be putting new MUL packing on
+ * either half.
+ */
+ if (new_a_pack && QPU_GET_FIELD(a, QPU_OP_MUL) != QPU_M_NOP)
+ return 0;
+
+ if (new_b_pack && QPU_GET_FIELD(b, QPU_OP_MUL) != QPU_M_NOP)
+ return 0;
+ }
+
+ /* unpacking: Make sure that non-NOP unpacks agree, then deal with
+ * special-case failing of adding a non-NOP unpack to something with a
+ * NOP unpack.
+ */
+ if (!merge_fields(&merge, a, b, QPU_UNPACK_MASK, 0))
+ return 0;
+ bool new_a_unpack = (QPU_GET_FIELD(a, QPU_UNPACK) !=
+ QPU_GET_FIELD(merge, QPU_UNPACK));
+ bool new_b_unpack = (QPU_GET_FIELD(b, QPU_UNPACK) !=
+ QPU_GET_FIELD(merge, QPU_UNPACK));
+ if (!(merge & QPU_PM)) {
+ /* Make sure we're not going to be putting a new
+ * a-file packing on either half.
+ */
+ if (new_a_unpack && QPU_GET_FIELD(a, QPU_RADDR_A) != QPU_R_NOP)
+ return 0;
+
+ if (new_b_unpack && QPU_GET_FIELD(b, QPU_RADDR_A) != QPU_R_NOP)
+ return 0;
+ } else {
+ /* Make sure we're not going to be putting new r4 unpack on
+ * either half.
+ */
+ if (new_a_unpack && reads_r4(a))
+ return 0;
+
+ if (new_b_unpack && reads_r4(b))
+ return 0;
+ }
+
if (ok)
return merge;
else