1 ;; Generic ARM Pipeline Description
2 ;; Copyright (C) 2003 Free Software Foundation, Inc.
4 ;; This file is part of GCC.
6 ;; GCC is free software; you can redistribute it and/or modify it
7 ;; under the terms of the GNU General Public License as published by
8 ;; the Free Software Foundation; either version 2, or (at your option)
11 ;; GCC is distributed in the hope that it will be useful, but
12 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
13 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 ;; General Public License for more details.
16 ;; You should have received a copy of the GNU General Public License
17 ;; along with GCC; see the file COPYING. If not, write to the Free
18 ;; Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
19 ;; 02110-1301, USA. */
21 (define_automaton "arm")
25 ; Strictly, we should model a 4-deep write buffer for ARM7xx based chips
27 ; The write buffer on some of the arm6 processors is hard to model exactly.
28 ; There is room in the buffer for up to two addresses and up to eight words
29 ; of memory, but the two needn't be split evenly. When writing the two
30 ; addresses are fully pipelined. However, a read from memory that is not
31 ; currently in the cache will block until the writes have completed.
32 ; It is normally the case that FCLK and MCLK will be in the ratio 2:1, so
33 ; writes will take 2 FCLK cycles per word, if FCLK and MCLK are asynchronous
34 ; (they aren't allowed to be at present) then there is a startup cost of 1MCLK
35 ; cycle to add as well.
36 (define_cpu_unit "write_buf" "arm")
38 ;; Write blockage unit
40 ; The write_blockage unit models (partially), the fact that reads will stall
41 ; until the write buffer empties.
42 ; The f_mem_r and r_mem_f could also block, but they are to the stack,
43 ; so we don't model them here
44 (define_cpu_unit "write_blockage" "arm")
48 (define_cpu_unit "core" "arm")
50 (define_insn_reservation "r_mem_f_wbuf" 5
51 (and (eq_attr "generic_sched" "yes")
52 (and (eq_attr "model_wbuf" "yes")
53 (eq_attr "type" "r_mem_f")))
56 (define_insn_reservation "store_wbuf" 5
57 (and (eq_attr "generic_sched" "yes")
58 (and (eq_attr "model_wbuf" "yes")
59 (eq_attr "type" "store1")))
60 "core+write_buf*3+write_blockage*5")
62 (define_insn_reservation "store2_wbuf" 7
63 (and (eq_attr "generic_sched" "yes")
64 (and (eq_attr "model_wbuf" "yes")
65 (eq_attr "type" "store2")))
66 "core+write_buf*4+write_blockage*7")
68 (define_insn_reservation "store3_wbuf" 9
69 (and (eq_attr "generic_sched" "yes")
70 (and (eq_attr "model_wbuf" "yes")
71 (eq_attr "type" "store3")))
72 "core+write_buf*5+write_blockage*9")
74 (define_insn_reservation "store4_wbuf" 11
75 (and (eq_attr "generic_sched" "yes")
76 (and (eq_attr "model_wbuf" "yes")
77 (eq_attr "type" "store4")))
78 "core+write_buf*6+write_blockage*11")
80 (define_insn_reservation "store2" 3
81 (and (eq_attr "generic_sched" "yes")
82 (and (eq_attr "model_wbuf" "no")
83 (eq_attr "type" "store2")))
86 (define_insn_reservation "store3" 4
87 (and (eq_attr "generic_sched" "yes")
88 (and (eq_attr "model_wbuf" "no")
89 (eq_attr "type" "store3")))
92 (define_insn_reservation "store4" 5
93 (and (eq_attr "generic_sched" "yes")
94 (and (eq_attr "model_wbuf" "no")
95 (eq_attr "type" "store4")))
98 (define_insn_reservation "store_ldsched" 1
99 (and (eq_attr "generic_sched" "yes")
100 (and (eq_attr "ldsched" "yes")
101 (eq_attr "type" "store1")))
104 (define_insn_reservation "load_ldsched_xscale" 3
105 (and (eq_attr "generic_sched" "yes")
106 (and (eq_attr "ldsched" "yes")
107 (and (eq_attr "type" "load_byte,load1")
108 (eq_attr "is_xscale" "yes"))))
111 (define_insn_reservation "load_ldsched" 2
112 (and (eq_attr "generic_sched" "yes")
113 (and (eq_attr "ldsched" "yes")
114 (and (eq_attr "type" "load_byte,load1")
115 (eq_attr "is_xscale" "no"))))
118 (define_insn_reservation "load_or_store" 2
119 (and (eq_attr "generic_sched" "yes")
120 (and (eq_attr "ldsched" "!yes")
121 (eq_attr "type" "load_byte,load1,load2,load3,load4,store1")))
124 (define_insn_reservation "mult" 16
125 (and (eq_attr "generic_sched" "yes")
126 (and (eq_attr "ldsched" "no") (eq_attr "type" "mult")))
129 (define_insn_reservation "mult_ldsched_strongarm" 3
130 (and (eq_attr "generic_sched" "yes")
131 (and (eq_attr "ldsched" "yes")
132 (and (eq_attr "is_strongarm" "yes")
133 (eq_attr "type" "mult"))))
136 (define_insn_reservation "mult_ldsched" 4
137 (and (eq_attr "generic_sched" "yes")
138 (and (eq_attr "ldsched" "yes")
139 (and (eq_attr "is_strongarm" "no")
140 (eq_attr "type" "mult"))))
143 (define_insn_reservation "multi_cycle" 32
144 (and (eq_attr "generic_sched" "yes")
145 (and (eq_attr "core_cycles" "multi")
146 (eq_attr "type" "!mult,load_byte,load1,load2,load3,load4,store1,store2,store3,store4")))
149 (define_insn_reservation "single_cycle" 1
150 (and (eq_attr "generic_sched" "yes")
151 (eq_attr "core_cycles" "single"))