1 ;; Scheduling description for z900 (cpu 2064).
2 ;; Copyright (C) 2003, 2004 Free Software Foundation, Inc.
3 ;; Contributed by Hartmut Penner (hpenner@de.ibm.com) and
4 ;; Ulrich Weigand (uweigand@de.ibm.com).
6 ;; This file is part of GCC.
8 ;; GCC is free software; you can redistribute it and/or modify it under
9 ;; the terms of the GNU General Public License as published by the Free
10 ;; Software Foundation; either version 2, or (at your option) any later
13 ;; GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 ;; WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 ;; FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 ;; You should have received a copy of the GNU General Public License
19 ;; along with GCC; see the file COPYING. If not, write to the Free
20 ;; Software Foundation, 59 Temple Place - Suite 330, Boston, MA
25 ;; The microarchitecture of the IBM eServer z900 processor.
26 ;; E.M. Schwarz et al.
27 ;; IBM Journal of Research and Development Vol. 46 No 4/5, 2002.
29 ;; z900 (cpu 2064) pipeline
35 ;; --- c1 | Load bypass
43 ;; This scheduler description is also used for the g5 and g6.
45 (define_automaton "z_ipu")
46 (define_cpu_unit "z_e1" "z_ipu")
47 (define_cpu_unit "z_wr" "z_ipu")
50 (define_insn_reservation "z_la" 1
51 (and (eq_attr "cpu" "z900,g5,g6")
52 (eq_attr "type" "la"))
55 (define_insn_reservation "z_larl" 1
56 (and (eq_attr "cpu" "z900,g5,g6")
57 (eq_attr "type" "larl"))
60 (define_insn_reservation "z_load" 1
61 (and (eq_attr "cpu" "z900,g5,g6")
62 (eq_attr "type" "load"))
65 (define_insn_reservation "z_store" 1
66 (and (eq_attr "cpu" "z900,g5,g6")
67 (eq_attr "type" "store"))
70 (define_insn_reservation "z_call" 5
71 (and (eq_attr "cpu" "z900,g5,g6")
72 (eq_attr "type" "jsr"))
75 (define_insn_reservation "z_mul" 5
76 (and (eq_attr "cpu" "g5,g6,z900")
77 (eq_attr "type" "imulsi,imulhi"))
80 (define_insn_reservation "z_inf" 10
81 (and (eq_attr "cpu" "g5,g6,z900")
82 (eq_attr "type" "idiv,imuldi"))
85 ;; For everything else we check the atype flag.
87 (define_insn_reservation "z_int" 1
88 (and (eq_attr "cpu" "z900,g5,g6")
89 (and (not (eq_attr "type" "la,larl,load,store,jsr"))
90 (eq_attr "atype" "reg")))
93 (define_insn_reservation "z_agen" 1
94 (and (eq_attr "cpu" "z900,g5,g6")
95 (and (not (eq_attr "type" "la,larl,load,store,jsr"))
96 (eq_attr "atype" "agen")))
100 ;; s390_agen_dep_p returns 1, if a register is set in the
101 ;; first insn and used in the dependent insn to form a address.
105 ;; If an instruction uses a register to address memory, it needs
106 ;; to be set 5 cycles in advance.
109 (define_bypass 5 "z_int,z_agen"
110 "z_agen,z_la,z_call,z_load,z_store" "s390_agen_dep_p")
113 ;; A load type instruction uses a bypass to feed the result back
114 ;; to the address generation pipeline stage.
117 (define_bypass 3 "z_load"
118 "z_agen,z_la,z_call,z_load,z_store" "s390_agen_dep_p")
121 ;; A load address type instruction uses a bypass to feed the
122 ;; result back to the address generation pipeline stage.
125 (define_bypass 2 "z_larl,z_la"
126 "z_agen,z_la,z_call,z_load,z_store" "s390_agen_dep_p")