1 ;; Pipeline model for ST Microelectronics Loongson-2E/2F cores.
3 ;; Copyright (C) 2008 Free Software Foundation, Inc.
4 ;; Contributed by CodeSourcery.
6 ;; GCC 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 ;; GCC 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 (define_c_enum "unspec" [
21 UNSPEC_LOONGSON_ALU1_TURN_ENABLED_INSN
22 UNSPEC_LOONGSON_ALU2_TURN_ENABLED_INSN
23 UNSPEC_LOONGSON_FALU1_TURN_ENABLED_INSN
24 UNSPEC_LOONGSON_FALU2_TURN_ENABLED_INSN
27 ;; Automaton for integer instructions.
28 (define_automaton "ls2_alu")
31 ;; We need to query these units to adjust round-robin counter.
32 (define_query_cpu_unit "ls2_alu1_core,ls2_alu2_core" "ls2_alu")
34 ;; Pseudo units to help modeling of ALU1/2 round-robin dispatch strategy.
35 (define_cpu_unit "ls2_alu1_turn,ls2_alu2_turn" "ls2_alu")
37 ;; Pseudo units to enable/disable ls2_alu[12]_turn units.
38 ;; ls2_alu[12]_turn unit can be subscribed only after ls2_alu[12]_turn_enabled
39 ;; unit is subscribed.
40 (define_cpu_unit "ls2_alu1_turn_enabled,ls2_alu2_turn_enabled" "ls2_alu")
41 (presence_set "ls2_alu1_turn" "ls2_alu1_turn_enabled")
42 (presence_set "ls2_alu2_turn" "ls2_alu2_turn_enabled")
44 ;; Reservations for ALU1 (ALU2) instructions.
45 ;; Instruction goes to ALU1 (ALU2) and makes next ALU1/2 instruction to
46 ;; be dispatched to ALU2 (ALU1).
47 (define_reservation "ls2_alu1"
48 "(ls2_alu1_core+ls2_alu2_turn_enabled)|ls2_alu1_core")
49 (define_reservation "ls2_alu2"
50 "(ls2_alu2_core+ls2_alu1_turn_enabled)|ls2_alu2_core")
52 ;; Reservation for ALU1/2 instructions.
53 ;; Instruction will go to ALU1 iff ls2_alu1_turn_enabled is subscribed and
54 ;; switch the turn to ALU2 by subscribing ls2_alu2_turn_enabled.
55 ;; Or to ALU2 otherwise.
56 (define_reservation "ls2_alu"
57 "(ls2_alu1_core+ls2_alu1_turn+ls2_alu2_turn_enabled)
58 |(ls2_alu1_core+ls2_alu1_turn)
59 |(ls2_alu2_core+ls2_alu2_turn+ls2_alu1_turn_enabled)
60 |(ls2_alu2_core+ls2_alu2_turn)")
62 ;; Automaton for floating-point instructions.
63 (define_automaton "ls2_falu")
66 ;; We need to query these units to adjust round-robin counter.
67 (define_query_cpu_unit "ls2_falu1_core,ls2_falu2_core" "ls2_falu")
69 ;; Pseudo units to help modeling of FALU1/2 round-robin dispatch strategy.
70 (define_cpu_unit "ls2_falu1_turn,ls2_falu2_turn" "ls2_falu")
72 ;; Pseudo units to enable/disable ls2_falu[12]_turn units.
73 ;; ls2_falu[12]_turn unit can be subscribed only after
74 ;; ls2_falu[12]_turn_enabled unit is subscribed.
75 (define_cpu_unit "ls2_falu1_turn_enabled,ls2_falu2_turn_enabled" "ls2_falu")
76 (presence_set "ls2_falu1_turn" "ls2_falu1_turn_enabled")
77 (presence_set "ls2_falu2_turn" "ls2_falu2_turn_enabled")
79 ;; Reservations for FALU1 (FALU2) instructions.
80 ;; Instruction goes to FALU1 (FALU2) and makes next FALU1/2 instruction to
81 ;; be dispatched to FALU2 (FALU1).
82 (define_reservation "ls2_falu1"
83 "(ls2_falu1_core+ls2_falu2_turn_enabled)|ls2_falu1_core")
84 (define_reservation "ls2_falu2"
85 "(ls2_falu2_core+ls2_falu1_turn_enabled)|ls2_falu2_core")
87 ;; Reservation for FALU1/2 instructions.
88 ;; Instruction will go to FALU1 iff ls2_falu1_turn_enabled is subscribed and
89 ;; switch the turn to FALU2 by subscribing ls2_falu2_turn_enabled.
90 ;; Or to FALU2 otherwise.
91 (define_reservation "ls2_falu"
92 "(ls2_falu1+ls2_falu1_turn+ls2_falu2_turn_enabled)
93 |(ls2_falu1+ls2_falu1_turn)
94 |(ls2_falu2+ls2_falu2_turn+ls2_falu1_turn_enabled)
95 |(ls2_falu2+ls2_falu2_turn)")
97 ;; The following 4 instructions each subscribe one of
98 ;; ls2_[f]alu{1,2}_turn_enabled units according to this attribute.
99 ;; These instructions are used in mips.c: sched_ls2_dfa_post_advance_cycle.
101 (define_attr "ls2_turn_type" "alu1,alu2,falu1,falu2,unknown"
102 (const_string "unknown"))
104 ;; Subscribe ls2_alu1_turn_enabled.
105 (define_insn "ls2_alu1_turn_enabled_insn"
106 [(unspec [(const_int 0)] UNSPEC_LOONGSON_ALU1_TURN_ENABLED_INSN)]
108 { gcc_unreachable (); }
109 [(set_attr "ls2_turn_type" "alu1")])
111 (define_insn_reservation "ls2_alu1_turn_enabled" 0
112 (eq_attr "ls2_turn_type" "alu1")
113 "ls2_alu1_turn_enabled")
115 ;; Subscribe ls2_alu2_turn_enabled.
116 (define_insn "ls2_alu2_turn_enabled_insn"
117 [(unspec [(const_int 0)] UNSPEC_LOONGSON_ALU2_TURN_ENABLED_INSN)]
119 { gcc_unreachable (); }
120 [(set_attr "ls2_turn_type" "alu2")])
122 (define_insn_reservation "ls2_alu2_turn_enabled" 0
123 (eq_attr "ls2_turn_type" "alu2")
124 "ls2_alu2_turn_enabled")
126 ;; Subscribe ls2_falu1_turn_enabled.
127 (define_insn "ls2_falu1_turn_enabled_insn"
128 [(unspec [(const_int 0)] UNSPEC_LOONGSON_FALU1_TURN_ENABLED_INSN)]
130 { gcc_unreachable (); }
131 [(set_attr "ls2_turn_type" "falu1")])
133 (define_insn_reservation "ls2_falu1_turn_enabled" 0
134 (eq_attr "ls2_turn_type" "falu1")
135 "ls2_falu1_turn_enabled")
137 ;; Subscribe ls2_falu2_turn_enabled.
138 (define_insn "ls2_falu2_turn_enabled_insn"
139 [(unspec [(const_int 0)] UNSPEC_LOONGSON_FALU2_TURN_ENABLED_INSN)]
141 { gcc_unreachable (); }
142 [(set_attr "ls2_turn_type" "falu2")])
144 (define_insn_reservation "ls2_falu2_turn_enabled" 0
145 (eq_attr "ls2_turn_type" "falu2")
146 "ls2_falu2_turn_enabled")
148 ;; Automaton for memory operations.
149 (define_automaton "ls2_mem")
152 (define_query_cpu_unit "ls2_mem" "ls2_mem")
154 ;; Reservation for integer instructions.
155 (define_insn_reservation "ls2_alu" 2
156 (and (eq_attr "cpu" "loongson_2e,loongson_2f")
157 (eq_attr "type" "arith,condmove,const,logical,mfhilo,move,
158 mthilo,nop,shift,signext,slt"))
161 ;; Reservation for branch instructions.
162 (define_insn_reservation "ls2_branch" 2
163 (and (eq_attr "cpu" "loongson_2e,loongson_2f")
164 (eq_attr "type" "branch,jump,call,trap"))
167 ;; Reservation for integer multiplication instructions.
168 (define_insn_reservation "ls2_imult" 5
169 (and (eq_attr "cpu" "loongson_2e,loongson_2f")
170 (eq_attr "type" "imul,imul3nc"))
171 "ls2_alu2,ls2_alu2_core")
173 ;; Reservation for integer division / remainder instructions.
174 ;; These instructions use the SRT algorithm and hence take 2-38 cycles.
175 (define_insn_reservation "ls2_idiv" 20
176 (and (eq_attr "cpu" "loongson_2e,loongson_2f")
177 (eq_attr "type" "idiv,idiv3"))
178 "ls2_alu2,ls2_alu2_core*18")
180 ;; Reservation for memory load instructions.
181 (define_insn_reservation "ls2_load" 5
182 (and (eq_attr "cpu" "loongson_2e,loongson_2f")
183 (eq_attr "type" "load,fpload,mfc,mtc"))
186 (define_insn_reservation "ls2_prefetch" 0
187 (and (eq_attr "cpu" "loongson_2e,loongson_2f")
188 (eq_attr "type" "prefetch,prefetchx"))
191 ;; Reservation for memory store instructions.
192 ;; With stores we assume they don't alias with dependent loads.
193 ;; Therefore we set the latency to zero.
194 (define_insn_reservation "ls2_store" 0
195 (and (eq_attr "cpu" "loongson_2e,loongson_2f")
196 (eq_attr "type" "store,fpstore"))
199 ;; Reservation for floating-point instructions of latency 3.
200 (define_insn_reservation "ls2_fp3" 3
201 (and (eq_attr "cpu" "loongson_2e,loongson_2f")
202 (eq_attr "type" "fabs,fneg,fcmp,fmove"))
205 ;; Reservation for floating-point instructions of latency 5.
206 (define_insn_reservation "ls2_fp5" 5
207 (and (eq_attr "cpu" "loongson_2e,loongson_2f")
208 (eq_attr "type" "fcvt"))
211 ;; Reservation for floating-point instructions that can go
212 ;; to either of FALU1/2 units.
213 (define_insn_reservation "ls2_falu" 7
214 (and (eq_attr "cpu" "loongson_2e,loongson_2f")
215 (eq_attr "type" "fadd,fmul,fmadd"))
218 ;; Reservation for floating-point division / remainder instructions.
219 ;; These instructions use the SRT algorithm and hence take a variable amount
221 ;; div.s takes 5-11 cycles
222 ;; div.d takes 5-18 cycles
223 (define_insn_reservation "ls2_fdiv" 9
224 (and (eq_attr "cpu" "loongson_2e,loongson_2f")
225 (eq_attr "type" "fdiv"))
226 "ls2_falu2,ls2_falu2_core*7")
228 ;; Reservation for floating-point sqrt instructions.
229 ;; These instructions use the SRT algorithm and hence take a variable amount
231 ;; sqrt.s takes 5-17 cycles
232 ;; sqrt.d takes 5-32 cycles
233 (define_insn_reservation "ls2_fsqrt" 15
234 (and (eq_attr "cpu" "loongson_2e,loongson_2f")
235 (eq_attr "type" "fsqrt"))
236 "ls2_falu2,ls2_falu2_core*13")
238 ;; Two consecutive ALU instructions.
239 (define_insn_reservation "ls2_multi" 4
240 (and (eq_attr "cpu" "loongson_2e,loongson_2f")
241 (eq_attr "type" "multi"))
242 "(ls2_alu1,ls2_alu2_core)|(ls2_alu2,ls2_alu1_core)")
244 ;; Reservation for everything else. Normally, this reservation
245 ;; will only be used to handle cases like compiling for non-loongson
246 ;; CPUs with -mtune=loongson2?.
248 ;; This reservation depends upon the fact that DFA will check
249 ;; reservations in the same order as they appear in the file.
250 (define_insn_reservation "ls2_unknown" 1
251 (eq_attr "cpu" "loongson_2e,loongson_2f")
252 "ls2_alu1_core+ls2_alu2_core+ls2_falu1_core+ls2_falu2_core+ls2_mem")