1;; DFA-based pipeline description for the RM7000.
2;;   Copyright (C) 2003-2015 Free Software Foundation, Inc.
3;;
4;; This file is part of GCC.
5
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
8;; by the Free Software Foundation; either version 3, or (at your
9;; option) any later version.
10
11;; GCC is distributed in the hope that it will be useful, but WITHOUT
12;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
13;; or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
14;; License for more details.
15
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/>.
19
20;; .........................
21;;
22;; The RM7000 is a dual-issue processor that can bundle instructions as:
23;; {arith|load|store}{arith|imul|idiv|branch|float}
24;;
25;; Reference:
26;;   "RM7000 Family User Manual, PMC-2002296"
27;;
28;; .........................
29
30;; Use three automata to isolate long latency operations, reducing space.
31(define_automaton "rm7000_other, rm7000_fdiv, rm7000_idiv")
32
33;;
34;; Describe the resources.
35;;
36
37;; Global
38(define_cpu_unit "rm7_iss0,rm7_iss1" "rm7000_other")
39
40;; Integer execution unit (M-Pipe).
41(define_cpu_unit "ixum_addsub_agen" "rm7000_other")
42
43;; Integer execution unit (F-Pipe).
44(define_cpu_unit "ixuf_addsub" "rm7000_other")
45(define_cpu_unit "ixuf_branch" "rm7000_other")
46(define_cpu_unit "ixuf_mpydiv" "rm7000_other")
47(define_cpu_unit "ixuf_mpydiv_iter" "rm7000_idiv")
48;; Floating-point unit (F-Pipe).
49(define_cpu_unit "fxuf_add" "rm7000_other")
50(define_cpu_unit "fxuf_mpy" "rm7000_other")
51(define_cpu_unit "fxuf_mpy_iter" "rm7000_fdiv")
52(define_cpu_unit "fxuf_divsqrt" "rm7000_other")
53(define_cpu_unit "fxuf_divsqrt_iter" "rm7000_fdiv")
54
55(exclusion_set "ixuf_addsub"
56	       "ixuf_branch,ixuf_mpydiv,fxuf_add,fxuf_mpy,fxuf_divsqrt")
57(exclusion_set "ixuf_branch" "ixuf_mpydiv,fxuf_add,fxuf_mpy,fxuf_divsqrt")
58(exclusion_set "ixuf_mpydiv" "fxuf_add,fxuf_mpy,fxuf_divsqrt")
59(exclusion_set "fxuf_add" "fxuf_mpy,fxuf_divsqrt")
60(exclusion_set "fxuf_mpy" "fxuf_divsqrt")
61
62;; After branch any insn cannot be issued.
63(absence_set "rm7_iss0,rm7_iss1" "ixuf_branch")
64
65;;
66;; Define reservations for unit name mnemonics or combinations.
67;;
68
69(define_reservation "rm7_iss" "rm7_iss0|rm7_iss1")
70(define_reservation "rm7_single_dispatch" "rm7_iss0+rm7_iss1")
71
72(define_reservation "rm7_iaddsub" "rm7_iss+(ixum_addsub_agen|ixuf_addsub)")
73(define_reservation "rm7_imem" "rm7_iss+ixum_addsub_agen")
74(define_reservation "rm7_impydiv" "rm7_iss+ixuf_mpydiv")
75(define_reservation "rm7_impydiv_iter" "ixuf_mpydiv_iter")
76(define_reservation "rm7_branch" "rm7_iss+ixuf_branch")
77
78(define_reservation "rm7_fpadd"	"rm7_iss+fxuf_add")
79(define_reservation "rm7_fpmpy"	"rm7_iss+fxuf_mpy")
80(define_reservation "rm7_fpmpy_iter" "fxuf_mpy_iter")
81(define_reservation "rm7_fpdivsqr" "rm7_iss+fxuf_divsqrt")
82(define_reservation "rm7_fpdivsqr_iter" "fxuf_divsqrt_iter")
83
84;;
85;; Describe instruction reservations for integer operations.
86;;
87
88(define_insn_reservation "rm7_int_other" 1
89  (and (eq_attr "cpu" "r7000")
90       (eq_attr "type" "arith,shift,signext,slt,clz,const,condmove,logical,move,nop,trap"))
91  "rm7_iaddsub")
92
93(define_insn_reservation "rm7_ld" 2
94  (and (eq_attr "cpu" "r7000")
95       (eq_attr "type" "load,fpload,fpidxload"))
96  "rm7_imem")
97
98(define_insn_reservation "rm7_st" 1
99  (and (eq_attr "cpu" "r7000")
100       (eq_attr "type" "store,fpstore,fpidxstore"))
101  "rm7_imem")
102
103(define_insn_reservation "rm7_idiv_si" 36
104  (and (eq_attr "cpu" "r7000")
105       (and (eq_attr "type" "idiv")
106	    (eq_attr "mode" "SI")))
107  "rm7_impydiv+(rm7_impydiv_iter*36)")
108
109(define_insn_reservation "rm7_idiv_di" 68
110  (and (eq_attr "cpu" "r7000")
111       (and (eq_attr "type" "idiv")
112	    (eq_attr "mode" "DI")))
113  "rm7_impydiv+(rm7_impydiv_iter*68)")
114
115(define_insn_reservation "rm7_impy_si_mult" 5
116  (and (eq_attr "cpu" "r7000")
117       (and (eq_attr "type" "imul,imadd")
118	    (eq_attr "mode" "SI")))
119  "rm7_impydiv+(rm7_impydiv_iter*3)")
120
121;; There are an additional 2 stall cycles.
122(define_insn_reservation "rm7_impy_si_mul" 2
123  (and (eq_attr "cpu" "r7000")
124       (and (eq_attr "type" "imul3")
125	    (eq_attr "mode" "SI")))
126  "rm7_impydiv")
127
128(define_insn_reservation "rm7_impy_di" 9
129  (and (eq_attr "cpu" "r7000")
130       (and (eq_attr "type" "imul,imul3")
131	    (eq_attr "mode" "DI")))
132  "rm7_impydiv+(rm7_impydiv_iter*8)")
133
134;; Move to/from HI/LO.
135(define_insn_reservation "rm7_mthilo" 3
136  (and (eq_attr "cpu" "r7000")
137       (eq_attr "type" "mthi,mtlo"))
138  "rm7_impydiv")
139
140(define_insn_reservation "rm7_mfhilo" 1
141  (and (eq_attr "cpu" "r7000")
142       (eq_attr "type" "mfhi,mflo"))
143  "rm7_impydiv")
144
145;; Move to/from fp coprocessor.
146(define_insn_reservation "rm7_ixfer" 2
147  (and (eq_attr "cpu" "r7000")
148       (eq_attr "type" "mfc,mtc"))
149  "rm7_iaddsub")
150
151(define_insn_reservation "rm7_ibr" 3
152  (and (eq_attr "cpu" "r7000")
153       (eq_attr "type" "branch,jump,call"))
154  "rm7_branch")
155
156;;
157;; Describe instruction reservations for the floating-point operations.
158;;
159(define_insn_reservation "rm7_fp_quick" 4
160  (and (eq_attr "cpu" "r7000")
161       (eq_attr "type" "fneg,fcmp,fabs,fmove"))
162  "rm7_fpadd")
163
164(define_insn_reservation "rm7_fp_other" 4
165  (and (eq_attr "cpu" "r7000")
166       (eq_attr "type" "fadd"))
167  "rm7_fpadd")
168
169(define_insn_reservation "rm7_fp_cvt" 4
170  (and (eq_attr "cpu" "r7000")
171       (eq_attr "type" "fcvt"))
172  "rm7_fpadd")
173
174(define_insn_reservation "rm7_fp_divsqrt_df" 36
175  (and (eq_attr "cpu" "r7000")
176       (and (eq_attr "type" "fdiv,frdiv,fsqrt")
177	    (eq_attr "mode" "DF")))
178  "rm7_fpdivsqr+(rm7_fpdivsqr_iter*36)")
179
180(define_insn_reservation "rm7_fp_divsqrt_sf" 21
181  (and (eq_attr "cpu" "r7000")
182       (and (eq_attr "type" "fdiv,frdiv,fsqrt")
183	    (eq_attr "mode" "SF")))
184  "rm7_fpdivsqr+(rm7_fpdivsqr_iter*21)")
185
186(define_insn_reservation "rm7_fp_rsqrt_df" 68
187  (and (eq_attr "cpu" "r7000")
188       (and (eq_attr "type" "frsqrt")
189	    (eq_attr "mode" "DF")))
190  "rm7_fpdivsqr+(rm7_fpdivsqr_iter*68)")
191
192(define_insn_reservation "rm7_fp_rsqrt_sf" 38
193  (and (eq_attr "cpu" "r7000")
194       (and (eq_attr "type" "frsqrt")
195	    (eq_attr "mode" "SF")))
196  "rm7_fpdivsqr+(rm7_fpdivsqr_iter*38)")
197
198(define_insn_reservation "rm7_fp_mpy_sf" 4
199  (and (eq_attr "cpu" "r7000")
200       (and (eq_attr "type" "fmul,fmadd")
201	    (eq_attr "mode" "SF")))
202  "rm7_fpmpy+rm7_fpmpy_iter")
203
204(define_insn_reservation "rm7_fp_mpy_df" 5
205  (and (eq_attr "cpu" "r7000")
206       (and (eq_attr "type" "fmul,fmadd")
207	    (eq_attr "mode" "DF")))
208  "rm7_fpmpy+(rm7_fpmpy_iter*2)")
209
210;; Force single-dispatch for unknown or multi.
211(define_insn_reservation "rm7_unknown" 1
212  (and (eq_attr "cpu" "r7000")
213       (eq_attr "type" "unknown,multi,atomic,syncloop"))
214  "rm7_single_dispatch")
215