v3d: Fix pack/unpack of VFPACK operand unpacks.

We want to be able to copy propagate our texture unpacks into the vfpack.

src/broadcom/qpu/qpu_pack.c

@@ -776,7 +776,11 @@ v3d_qpu_add_unpack(const struct v3d_device_info *devinfo, uint64_t packed_inst,
         case V3D_QPU_A_FMIN:
         case V3D_QPU_A_FMAX:
         case V3D_QPU_A_FCMP:
-                instr->alu.add.output_pack = (op >> 4) & 0x3;
+        case V3D_QPU_A_VFPACK:
+                if (instr->alu.add.op != V3D_QPU_A_VFPACK)
+                        instr->alu.add.output_pack = (op >> 4) & 0x3;
+                else
+                        instr->alu.add.output_pack = V3D_QPU_PACK_NONE;
 
                 if (!v3d_qpu_float32_unpack_unpack((op >> 2) & 0x3,
                                                    &instr->alu.add.a_unpack)) {
@@ -1042,6 +1046,32 @@ v3d_qpu_add_pack(const struct v3d_device_info *devinfo,
 
                 opcode |= a_unpack << 2;
                 opcode |= b_unpack << 0;
+
+                break;
+        }
+
+        case V3D_QPU_A_VFPACK: {
+                uint32_t a_unpack;
+                uint32_t b_unpack;
+
+                if (instr->alu.add.a_unpack == V3D_QPU_UNPACK_ABS ||
+                    instr->alu.add.b_unpack == V3D_QPU_UNPACK_ABS) {
+                        return false;
+                }
+
+                if (!v3d_qpu_float32_unpack_pack(instr->alu.add.a_unpack,
+                                                 &a_unpack)) {
+                        return false;
+                }
+
+                if (!v3d_qpu_float32_unpack_pack(instr->alu.add.b_unpack,
+                                                 &b_unpack)) {
+                        return false;
+                }
+
+                opcode = (opcode & ~(1 << 2)) | (a_unpack << 2);
+                opcode = (opcode & ~(1 << 0)) | (b_unpack << 0);
+
                 break;
         }
 

src/broadcom/qpu/tests/qpu_disasm.c

@@ -48,6 +48,8 @@ static const struct {
         { 33, 0x1c0a0dfde2294000ull, "fcmp.ifna  rf61.h, r4.abs, r2.l; vfmul  rf55, r2.hh, r1" },
         { 33, 0x2011c89b402cc000ull, "fsub.norz  rf27, r4.abs, r1.abs; vfmul.ifa  rf34, r3.swp, r1" },
 
+        { 33, 0xe01b42ab3bb063c0ull, "vfpack.andnc  rf43, rf15.l, r0.h; fmul.ifna  rf10.h, r4.l, r5.abs" },
+
         /* small immediates */
         { 33, 0x5de24398bbdc6218ull, "vflb.andnn  rf24     ; fmul  rf14, -8, rf8.h" },
         { 33, 0x25ef83d8b166f00full, "vfmin.pushn  rf24, 15.ff, r5; smul24.ifnb  rf15, r1, r3" },