1 ;; Scheduling description for Renesas SH4a
2 ;; Copyright (C) 2003-2024 Free Software Foundation, Inc.
4 ;; This file is part of GCC.
6 ;; GNU CC is free software; you can redistribute it and/or modify
7 ;; it under the terms of the GNU General Public License as published by
8 ;; the Free Software Foundation; either version 3, or (at your option)
11 ;; GNU CC is distributed in the hope that it will be useful,
12 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
13 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 ;; GNU 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 COPYING3. If not see
18 ;; <http://www.gnu.org/licenses/>.
20 ;; The following description models the SH4A pipeline
21 ;; using the DFA based scheduler.
22 (define_automaton "sh4a")
24 (define_cpu_unit "sh4a_ex" "sh4a")
25 (define_cpu_unit "sh4a_ls" "sh4a")
26 (define_cpu_unit "sh4a_fex" "sh4a")
27 (define_cpu_unit "sh4a_fls" "sh4a")
28 (define_cpu_unit "sh4a_mult" "sh4a")
29 (define_cpu_unit "sh4a_fdiv" "sh4a")
31 ;; Decoding is done on the integer pipeline like the
32 ;; sh4. Define issue to be the | of the two pipelines
33 ;; to control how often instructions are issued.
34 (define_reservation "ID_or" "sh4a_ex|sh4a_ls")
35 (define_reservation "ID_and" "sh4a_ex+sh4a_ls")
37 ;; =======================================================
38 ;; Locking Descriptions
40 ;; Sh4a_Memory access on the LS pipeline.
41 (define_cpu_unit "sh4a_memory" "sh4a")
43 ;; Other access on the LS pipeline.
44 (define_cpu_unit "sh4a_load_store" "sh4a")
46 ;; The address calculator used for branch instructions.
47 ;; This will be reserved after "issue" of branch instructions
48 ;; and this is to make sure that no two branch instructions
49 ;; can be issued in parallel.
50 (define_reservation "sh4a_addrcalc" "sh4a_ex")
52 ;; =======================================================
55 ;; Branch (BF,BF/S,BT,BT/S,BRA,BSR)
57 ;; Latency when taken: 2
58 (define_insn_reservation "sh4a_branch" 2
59 (and (eq_attr "cpu" "sh4a")
60 (eq_attr "type" "cbranch,jump"))
61 "ID_or+sh4a_addrcalc")
66 (define_insn_reservation "sh4a_jump" 3
67 (and (eq_attr "cpu" "sh4a")
68 (eq_attr "type" "return,jump_ind"))
69 "ID_or+sh4a_addrcalc")
74 (define_insn_reservation "sh4a_rte" 3
75 (and (eq_attr "cpu" "sh4a")
76 (eq_attr "type" "rte"))
82 (define_insn_reservation "sh4a_ex" 0
83 (and (eq_attr "cpu" "sh4a")
84 (eq_attr "insn_class" "ex_group"))
90 (define_insn_reservation "sh4a_mova" 1
91 (and (eq_attr "cpu" "sh4a")
92 (eq_attr "type" "mova"))
93 "sh4a_ls+sh4a_load_store")
98 ;; ??? not sure if movi8 belongs here, but that's where it was
99 ;; effectively before.
100 (define_insn_reservation "sh4a_mov" 0
101 (and (eq_attr "cpu" "sh4a")
102 (eq_attr "type" "move,movi8,gp_mac"))
108 (define_insn_reservation "sh4a_load" 3
109 (and (eq_attr "cpu" "sh4a")
110 (eq_attr "type" "load,pcload,mem_mac"))
111 "sh4a_ls+sh4a_memory")
113 (define_insn_reservation "sh4a_load_si" 3
114 (and (eq_attr "cpu" "sh4a")
115 (eq_attr "type" "load_si,pcload_si"))
116 "sh4a_ls+sh4a_memory")
121 (define_insn_reservation "sh4a_store" 0
122 (and (eq_attr "cpu" "sh4a")
123 (eq_attr "type" "store,fstore,mac_mem"))
124 "sh4a_ls+sh4a_memory")
131 (define_insn_reservation "sh4a_movua" 3
132 (and (eq_attr "cpu" "sh4a")
133 (eq_attr "type" "movua"))
134 "sh4a_ls+sh4a_memory*2")
136 ;; Fixed point multiplication (single)
139 (define_insn_reservation "sh4a_smult" 2
140 (and (eq_attr "cpu" "sh4a")
141 (eq_attr "type" "smpy"))
144 ;; Fixed point multiplication (double)
147 (define_insn_reservation "sh4a_dmult" 3
148 (and (eq_attr "cpu" "sh4a")
149 (eq_attr "type" "dmpy"))
152 (define_insn_reservation "sh4a_mac_gp" 3
153 (and (eq_attr "cpu" "sh4a")
154 (eq_attr "type" "mac_gp"))
157 ;; Other MT group instructions(1 step operations)
160 (define_insn_reservation "sh4a_mt" 1
161 (and (eq_attr "cpu" "sh4a")
162 (eq_attr "type" "mt_group"))
165 ;; Floating point reg move
168 (define_insn_reservation "sh4a_freg_mov" 2
169 (and (eq_attr "cpu" "sh4a")
170 (eq_attr "type" "fmove"))
173 ;; Single precision floating point computation FCMP/EQ,
174 ;; FCMP/GT, FADD, FLOAT, FMAC, FMUL, FSUB, FTRC, FRVHG, FSCHG
177 (define_insn_reservation "sh4a_fp_arith" 3
178 (and (eq_attr "cpu" "sh4a")
179 (eq_attr "type" "fp,fp_cmp,fpscr_toggle"))
182 (define_insn_reservation "sh4a_fp_arith_ftrc" 3
183 (and (eq_attr "cpu" "sh4a")
184 (eq_attr "type" "ftrc_s"))
187 ;; Single-precision FDIV/FSQRT
190 (define_insn_reservation "sh4a_fdiv" 20
191 (and (eq_attr "cpu" "sh4a")
192 (eq_attr "type" "fdiv"))
193 "ID_or,sh4a_fex+sh4a_fdiv,sh4a_fex")
195 ;; Double Precision floating point computation
196 ;; (FCNVDS, FCNVSD, FLOAT, FTRC)
199 (define_insn_reservation "sh4a_dp_float" 3
200 (and (eq_attr "cpu" "sh4a")
201 (eq_attr "type" "dfp_conv"))
204 ;; Double-precision floating-point (FADD,FMUL,FSUB)
207 (define_insn_reservation "sh4a_fp_double_arith" 5
208 (and (eq_attr "cpu" "sh4a")
209 (eq_attr "type" "dfp_arith,dfp_mul"))
212 ;; Double precision FDIV/SQRT
215 (define_insn_reservation "sh4a_dp_div" 36
216 (and (eq_attr "cpu" "sh4a")
217 (eq_attr "type" "dfdiv"))
218 "ID_or,sh4a_fex+sh4a_fdiv,sh4a_fex*2")
223 (define_insn_reservation "sh4a_fsrra" 5
224 (and (eq_attr "cpu" "sh4a")
225 (eq_attr "type" "fsrra"))
231 (define_insn_reservation "sh4a_fsca" 7
232 (and (eq_attr "cpu" "sh4a")
233 (eq_attr "type" "fsca"))