1 ;; DFA-based pipeline description for the VR1x000.
2 ;; Copyright (C) 2005-2018 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
8 ;; by the Free Software Foundation; either version 3, or (at your
9 ;; option) any later version.
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.
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/>.
21 ;; R12K/R14K/R16K are derivatives of R10K, thus copy its description
22 ;; until specific tuning for each is added.
24 ;; R10000 has an int queue, fp queue, address queue.
25 ;; The int queue feeds ALU1 and ALU2.
26 ;; The fp queue feeds the fp-adder and fp-multiplier.
27 ;; The addr queue feeds the Load/Store unit.
29 ;; However, we define the fp-adder and fp-multiplier as
30 ;; separate automatons, because the fp-multiplier is
31 ;; divided into fp-multiplier, fp-division, and
32 ;; fp-squareroot units, all of which share the same
33 ;; issue and completion logic, yet can operate in
36 ;; This is based on the model described in the R10K Manual
37 ;; and it helps to reduce the size of the automata.
38 (define_automaton "r10k_a_int, r10k_a_fpadder, r10k_a_addr,
39 r10k_a_fpmpy, r10k_a_fpdiv, r10k_a_fpsqrt")
41 (define_cpu_unit "r10k_alu1" "r10k_a_int")
42 (define_cpu_unit "r10k_alu2" "r10k_a_int")
43 (define_cpu_unit "r10k_fpadd" "r10k_a_fpadder")
44 (define_cpu_unit "r10k_fpmpy" "r10k_a_fpmpy")
45 (define_cpu_unit "r10k_fpdiv" "r10k_a_fpdiv")
46 (define_cpu_unit "r10k_fpsqrt" "r10k_a_fpsqrt")
47 (define_cpu_unit "r10k_loadstore" "r10k_a_addr")
50 ;; R10k Loads and Stores.
51 (define_insn_reservation "r10k_load" 2
52 (and (eq_attr "cpu" "r10000")
53 (eq_attr "type" "load,prefetch,prefetchx"))
56 (define_insn_reservation "r10k_store" 0
57 (and (eq_attr "cpu" "r10000")
58 (eq_attr "type" "store,fpstore,fpidxstore"))
61 (define_insn_reservation "r10k_fpload" 3
62 (and (eq_attr "cpu" "r10000")
63 (eq_attr "type" "fpload,fpidxload"))
67 ;; Integer add/sub + logic ops, and mt hi/lo can be done by alu1 or alu2.
68 ;; Miscellaneous arith goes here too (this is a guess).
69 (define_insn_reservation "r10k_arith" 1
70 (and (eq_attr "cpu" "r10000")
71 (eq_attr "type" "arith,mthi,mtlo,slt,clz,const,nop,trap,logical"))
72 "r10k_alu1 | r10k_alu2")
74 ;; We treat mfhilo differently, because we need to know when
75 ;; it's HI and when it's LO.
76 (define_insn_reservation "r10k_mfhi" 1
77 (and (eq_attr "cpu" "r10000")
78 (eq_attr "type" "mfhi"))
79 "r10k_alu1 | r10k_alu2")
81 (define_insn_reservation "r10k_mflo" 1
82 (and (eq_attr "cpu" "r10000")
83 (eq_attr "type" "mflo"))
84 "r10k_alu1 | r10k_alu2")
87 ;; ALU1 handles shifts, branch eval, and condmove.
89 ;; Brancher is separate, but part of ALU1, but can only
90 ;; do one branch per cycle (is this even implementable?).
92 ;; Unsure if the brancher handles jumps and calls as well, but since
93 ;; they're related, we'll add them here for now.
94 (define_insn_reservation "r10k_brancher" 1
95 (and (eq_attr "cpu" "r10000")
96 (eq_attr "type" "shift,branch,jump,call"))
99 (define_insn_reservation "r10k_int_cmove" 1
100 (and (eq_attr "cpu" "r10000")
101 (and (eq_attr "type" "condmove")
102 (eq_attr "mode" "SI,DI")))
106 ;; Coprocessor Moves.
107 ;; mtc1/dmtc1 are handled by ALU1.
108 ;; mfc1/dmfc1 are handled by the fp-multiplier.
109 (define_insn_reservation "r10k_mt_xfer" 3
110 (and (eq_attr "cpu" "r10000")
111 (eq_attr "type" "mtc"))
114 (define_insn_reservation "r10k_mf_xfer" 2
115 (and (eq_attr "cpu" "r10000")
116 (eq_attr "type" "mfc"))
120 ;; Only ALU2 does int multiplications and divisions.
122 ;; According to the Vr10000 series user manual,
123 ;; integer mult and div insns can be issued one
124 ;; cycle earlier if using register Lo. We model
125 ;; this by using the Lo value by default, as it
126 ;; is the more common value, and use a bypass
127 ;; for the Hi value when needed.
129 ;; Also of note, There are different latencies
130 ;; for MULT/DMULT (Lo 5/Hi 6) and MULTU/DMULTU (Lo 6/Hi 7).
131 ;; However, gcc does not have separate types
132 ;; for these insns. Thus to strike a balance,
133 ;; we use the Hi latency value for imul
134 ;; operations until the imul type can be split.
135 (define_insn_reservation "r10k_imul_single" 6
136 (and (eq_attr "cpu" "r10000")
137 (and (eq_attr "type" "imul,imul3")
138 (eq_attr "mode" "SI")))
141 (define_insn_reservation "r10k_imul_double" 10
142 (and (eq_attr "cpu" "r10000")
143 (and (eq_attr "type" "imul,imul3")
144 (eq_attr "mode" "DI")))
147 ;; Divides keep ALU2 busy.
148 (define_insn_reservation "r10k_idiv_single" 34
149 (and (eq_attr "cpu" "r10000")
150 (and (eq_attr "type" "idiv")
151 (eq_attr "mode" "SI")))
154 (define_insn_reservation "r10k_idiv_double" 66
155 (and (eq_attr "cpu" "r10000")
156 (and (eq_attr "type" "idiv")
157 (eq_attr "mode" "DI")))
160 (define_bypass 35 "r10k_idiv_single" "r10k_mfhi")
161 (define_bypass 67 "r10k_idiv_double" "r10k_mfhi")
164 ;; Floating point add/sub, mul, abs value, neg, comp, & moves.
165 (define_insn_reservation "r10k_fp_miscadd" 2
166 (and (eq_attr "cpu" "r10000")
167 (eq_attr "type" "fadd,fabs,fneg,fcmp"))
170 (define_insn_reservation "r10k_fp_miscmul" 2
171 (and (eq_attr "cpu" "r10000")
172 (eq_attr "type" "fmul,fmove"))
175 (define_insn_reservation "r10k_fp_cmove" 2
176 (and (eq_attr "cpu" "r10000")
177 (and (eq_attr "type" "condmove")
178 (eq_attr "mode" "SF,DF")))
182 ;; The fcvt.s.[wl] insn has latency 4, repeat 2.
183 ;; All other fcvt insns have latency 2, repeat 1.
184 (define_insn_reservation "r10k_fcvt_single" 4
185 (and (eq_attr "cpu" "r10000")
186 (and (eq_attr "type" "fcvt")
187 (eq_attr "cnv_mode" "I2S")))
190 (define_insn_reservation "r10k_fcvt_other" 2
191 (and (eq_attr "cpu" "r10000")
192 (and (eq_attr "type" "fcvt")
193 (eq_attr "cnv_mode" "!I2S")))
197 ;; Run the fmadd insn through fp-adder first, then fp-multiplier.
199 ;; The latency for fmadd is 2 cycles if the result is used
200 ;; by another fmadd instruction.
201 (define_insn_reservation "r10k_fmadd" 4
202 (and (eq_attr "cpu" "r10000")
203 (eq_attr "type" "fmadd"))
204 "r10k_fpadd, r10k_fpmpy")
206 (define_bypass 2 "r10k_fmadd" "r10k_fmadd")
209 ;; Floating point Divisions & square roots.
210 (define_insn_reservation "r10k_fdiv_single" 12
211 (and (eq_attr "cpu" "r10000")
212 (and (eq_attr "type" "fdiv,frdiv")
213 (eq_attr "mode" "SF")))
216 (define_insn_reservation "r10k_fdiv_double" 19
217 (and (eq_attr "cpu" "r10000")
218 (and (eq_attr "type" "fdiv,frdiv")
219 (eq_attr "mode" "DF")))
222 (define_insn_reservation "r10k_fsqrt_single" 18
223 (and (eq_attr "cpu" "r10000")
224 (and (eq_attr "type" "fsqrt")
225 (eq_attr "mode" "SF")))
228 (define_insn_reservation "r10k_fsqrt_double" 33
229 (and (eq_attr "cpu" "r10000")
230 (and (eq_attr "type" "fsqrt")
231 (eq_attr "mode" "DF")))
234 (define_insn_reservation "r10k_frsqrt_single" 30
235 (and (eq_attr "cpu" "r10000")
236 (and (eq_attr "type" "frsqrt")
237 (eq_attr "mode" "SF")))
240 (define_insn_reservation "r10k_frsqrt_double" 52
241 (and (eq_attr "cpu" "r10000")
242 (and (eq_attr "type" "frsqrt")
243 (eq_attr "mode" "DF")))
247 ;; Handle unknown/multi insns here (this is a guess).
248 (define_insn_reservation "r10k_unknown" 1
249 (and (eq_attr "cpu" "r10000")
250 (eq_attr "type" "unknown,multi,atomic,syncloop"))
251 "r10k_alu1 + r10k_alu2")