Kirill Batuzov | 8f2e8c0 | 2011-07-07 16:37:12 +0400 | [diff] [blame] | 1 | /* |
| 2 | * Optimizations for Tiny Code Generator for QEMU |
| 3 | * |
| 4 | * Copyright (c) 2010 Samsung Electronics. |
| 5 | * Contributed by Kirill Batuzov <batuzovk@ispras.ru> |
| 6 | * |
| 7 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 8 | * of this software and associated documentation files (the "Software"), to deal |
| 9 | * in the Software without restriction, including without limitation the rights |
| 10 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 11 | * copies of the Software, and to permit persons to whom the Software is |
| 12 | * furnished to do so, subject to the following conditions: |
| 13 | * |
| 14 | * The above copyright notice and this permission notice shall be included in |
| 15 | * all copies or substantial portions of the Software. |
| 16 | * |
| 17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 18 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 19 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 20 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 21 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 22 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| 23 | * THE SOFTWARE. |
| 24 | */ |
| 25 | |
Peter Maydell | 757e725 | 2016-01-26 18:17:08 +0000 | [diff] [blame] | 26 | #include "qemu/osdep.h" |
Philippe Mathieu-Daudé | dcb32f1 | 2020-01-01 12:23:00 +0100 | [diff] [blame] | 27 | #include "tcg/tcg-op.h" |
Richard Henderson | 9016390 | 2021-03-18 10:21:45 -0600 | [diff] [blame] | 28 | #include "tcg-internal.h" |
Kirill Batuzov | 8f2e8c0 | 2011-07-07 16:37:12 +0400 | [diff] [blame] | 29 | |
Kirill Batuzov | 8f2e8c0 | 2011-07-07 16:37:12 +0400 | [diff] [blame] | 30 | #define CASE_OP_32_64(x) \ |
| 31 | glue(glue(case INDEX_op_, x), _i32): \ |
| 32 | glue(glue(case INDEX_op_, x), _i64) |
Kirill Batuzov | 8f2e8c0 | 2011-07-07 16:37:12 +0400 | [diff] [blame] | 33 | |
Richard Henderson | 170ba88 | 2017-11-22 09:07:11 +0100 | [diff] [blame] | 34 | #define CASE_OP_32_64_VEC(x) \ |
| 35 | glue(glue(case INDEX_op_, x), _i32): \ |
| 36 | glue(glue(case INDEX_op_, x), _i64): \ |
| 37 | glue(glue(case INDEX_op_, x), _vec) |
| 38 | |
Richard Henderson | 6fcb98e | 2020-03-30 17:44:30 -0700 | [diff] [blame] | 39 | typedef struct TempOptInfo { |
Aurelien Jarno | b41059d | 2015-07-27 12:41:44 +0200 | [diff] [blame] | 40 | bool is_const; |
Richard Henderson | 6349039 | 2017-06-20 13:43:15 -0700 | [diff] [blame] | 41 | TCGTemp *prev_copy; |
| 42 | TCGTemp *next_copy; |
Richard Henderson | 5479554 | 2020-09-06 16:21:32 -0700 | [diff] [blame] | 43 | uint64_t val; |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 44 | uint64_t z_mask; /* mask bit is 0 if and only if value bit is 0 */ |
Richard Henderson | 6fcb98e | 2020-03-30 17:44:30 -0700 | [diff] [blame] | 45 | } TempOptInfo; |
Kirill Batuzov | 22613af | 2011-07-07 16:37:13 +0400 | [diff] [blame] | 46 | |
Richard Henderson | 3b3f847 | 2021-08-23 22:06:31 -0700 | [diff] [blame] | 47 | typedef struct OptContext { |
Richard Henderson | dc84988 | 2021-08-24 07:13:45 -0700 | [diff] [blame] | 48 | TCGContext *tcg; |
Richard Henderson | d0ed515 | 2021-08-24 07:38:39 -0700 | [diff] [blame] | 49 | TCGOp *prev_mb; |
Richard Henderson | 3b3f847 | 2021-08-23 22:06:31 -0700 | [diff] [blame] | 50 | TCGTempSet temps_used; |
Richard Henderson | 137f1f4 | 2021-08-24 08:49:25 -0700 | [diff] [blame] | 51 | |
| 52 | /* In flight values from optimization. */ |
| 53 | uint64_t z_mask; |
Richard Henderson | 3b3f847 | 2021-08-23 22:06:31 -0700 | [diff] [blame] | 54 | } OptContext; |
| 55 | |
Richard Henderson | 6fcb98e | 2020-03-30 17:44:30 -0700 | [diff] [blame] | 56 | static inline TempOptInfo *ts_info(TCGTemp *ts) |
Aurelien Jarno | d9c769c | 2015-07-27 12:41:44 +0200 | [diff] [blame] | 57 | { |
Richard Henderson | 6349039 | 2017-06-20 13:43:15 -0700 | [diff] [blame] | 58 | return ts->state_ptr; |
Aurelien Jarno | d9c769c | 2015-07-27 12:41:44 +0200 | [diff] [blame] | 59 | } |
| 60 | |
Richard Henderson | 6fcb98e | 2020-03-30 17:44:30 -0700 | [diff] [blame] | 61 | static inline TempOptInfo *arg_info(TCGArg arg) |
Aurelien Jarno | d9c769c | 2015-07-27 12:41:44 +0200 | [diff] [blame] | 62 | { |
Richard Henderson | 6349039 | 2017-06-20 13:43:15 -0700 | [diff] [blame] | 63 | return ts_info(arg_temp(arg)); |
| 64 | } |
| 65 | |
| 66 | static inline bool ts_is_const(TCGTemp *ts) |
| 67 | { |
| 68 | return ts_info(ts)->is_const; |
| 69 | } |
| 70 | |
| 71 | static inline bool arg_is_const(TCGArg arg) |
| 72 | { |
| 73 | return ts_is_const(arg_temp(arg)); |
| 74 | } |
| 75 | |
| 76 | static inline bool ts_is_copy(TCGTemp *ts) |
| 77 | { |
| 78 | return ts_info(ts)->next_copy != ts; |
Aurelien Jarno | d9c769c | 2015-07-27 12:41:44 +0200 | [diff] [blame] | 79 | } |
| 80 | |
Aurelien Jarno | b41059d | 2015-07-27 12:41:44 +0200 | [diff] [blame] | 81 | /* Reset TEMP's state, possibly removing the temp for the list of copies. */ |
Richard Henderson | 6349039 | 2017-06-20 13:43:15 -0700 | [diff] [blame] | 82 | static void reset_ts(TCGTemp *ts) |
Kirill Batuzov | 22613af | 2011-07-07 16:37:13 +0400 | [diff] [blame] | 83 | { |
Richard Henderson | 6fcb98e | 2020-03-30 17:44:30 -0700 | [diff] [blame] | 84 | TempOptInfo *ti = ts_info(ts); |
| 85 | TempOptInfo *pi = ts_info(ti->prev_copy); |
| 86 | TempOptInfo *ni = ts_info(ti->next_copy); |
Richard Henderson | 6349039 | 2017-06-20 13:43:15 -0700 | [diff] [blame] | 87 | |
| 88 | ni->prev_copy = ti->prev_copy; |
| 89 | pi->next_copy = ti->next_copy; |
| 90 | ti->next_copy = ts; |
| 91 | ti->prev_copy = ts; |
| 92 | ti->is_const = false; |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 93 | ti->z_mask = -1; |
Richard Henderson | 6349039 | 2017-06-20 13:43:15 -0700 | [diff] [blame] | 94 | } |
| 95 | |
| 96 | static void reset_temp(TCGArg arg) |
| 97 | { |
| 98 | reset_ts(arg_temp(arg)); |
Kirill Batuzov | 22613af | 2011-07-07 16:37:13 +0400 | [diff] [blame] | 99 | } |
| 100 | |
Aurelien Jarno | 1208d7d | 2015-07-27 12:41:44 +0200 | [diff] [blame] | 101 | /* Initialize and activate a temporary. */ |
Richard Henderson | 3b3f847 | 2021-08-23 22:06:31 -0700 | [diff] [blame] | 102 | static void init_ts_info(OptContext *ctx, TCGTemp *ts) |
Aurelien Jarno | 1208d7d | 2015-07-27 12:41:44 +0200 | [diff] [blame] | 103 | { |
Richard Henderson | 6349039 | 2017-06-20 13:43:15 -0700 | [diff] [blame] | 104 | size_t idx = temp_idx(ts); |
Richard Henderson | 8f17a97 | 2020-03-30 19:52:02 -0700 | [diff] [blame] | 105 | TempOptInfo *ti; |
Richard Henderson | 6349039 | 2017-06-20 13:43:15 -0700 | [diff] [blame] | 106 | |
Richard Henderson | 3b3f847 | 2021-08-23 22:06:31 -0700 | [diff] [blame] | 107 | if (test_bit(idx, ctx->temps_used.l)) { |
Richard Henderson | 8f17a97 | 2020-03-30 19:52:02 -0700 | [diff] [blame] | 108 | return; |
| 109 | } |
Richard Henderson | 3b3f847 | 2021-08-23 22:06:31 -0700 | [diff] [blame] | 110 | set_bit(idx, ctx->temps_used.l); |
Richard Henderson | 8f17a97 | 2020-03-30 19:52:02 -0700 | [diff] [blame] | 111 | |
| 112 | ti = ts->state_ptr; |
| 113 | if (ti == NULL) { |
| 114 | ti = tcg_malloc(sizeof(TempOptInfo)); |
Richard Henderson | 6349039 | 2017-06-20 13:43:15 -0700 | [diff] [blame] | 115 | ts->state_ptr = ti; |
Richard Henderson | 8f17a97 | 2020-03-30 19:52:02 -0700 | [diff] [blame] | 116 | } |
| 117 | |
| 118 | ti->next_copy = ts; |
| 119 | ti->prev_copy = ts; |
| 120 | if (ts->kind == TEMP_CONST) { |
| 121 | ti->is_const = true; |
| 122 | ti->val = ts->val; |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 123 | ti->z_mask = ts->val; |
Richard Henderson | 8f17a97 | 2020-03-30 19:52:02 -0700 | [diff] [blame] | 124 | if (TCG_TARGET_REG_BITS > 32 && ts->type == TCG_TYPE_I32) { |
| 125 | /* High bits of a 32-bit quantity are garbage. */ |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 126 | ti->z_mask |= ~0xffffffffull; |
Richard Henderson | c052213 | 2020-03-29 18:55:52 -0700 | [diff] [blame] | 127 | } |
Richard Henderson | 8f17a97 | 2020-03-30 19:52:02 -0700 | [diff] [blame] | 128 | } else { |
| 129 | ti->is_const = false; |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 130 | ti->z_mask = -1; |
Aurelien Jarno | 1208d7d | 2015-07-27 12:41:44 +0200 | [diff] [blame] | 131 | } |
| 132 | } |
| 133 | |
Richard Henderson | 6349039 | 2017-06-20 13:43:15 -0700 | [diff] [blame] | 134 | static TCGTemp *find_better_copy(TCGContext *s, TCGTemp *ts) |
Aurelien Jarno | e590d4e | 2012-09-11 12:31:21 +0200 | [diff] [blame] | 135 | { |
Richard Henderson | 4c868ce | 2020-04-23 09:02:23 -0700 | [diff] [blame] | 136 | TCGTemp *i, *g, *l; |
Aurelien Jarno | e590d4e | 2012-09-11 12:31:21 +0200 | [diff] [blame] | 137 | |
Richard Henderson | 4c868ce | 2020-04-23 09:02:23 -0700 | [diff] [blame] | 138 | /* If this is already readonly, we can't do better. */ |
| 139 | if (temp_readonly(ts)) { |
Richard Henderson | 6349039 | 2017-06-20 13:43:15 -0700 | [diff] [blame] | 140 | return ts; |
Aurelien Jarno | e590d4e | 2012-09-11 12:31:21 +0200 | [diff] [blame] | 141 | } |
| 142 | |
Richard Henderson | 4c868ce | 2020-04-23 09:02:23 -0700 | [diff] [blame] | 143 | g = l = NULL; |
Richard Henderson | 6349039 | 2017-06-20 13:43:15 -0700 | [diff] [blame] | 144 | for (i = ts_info(ts)->next_copy; i != ts; i = ts_info(i)->next_copy) { |
Richard Henderson | 4c868ce | 2020-04-23 09:02:23 -0700 | [diff] [blame] | 145 | if (temp_readonly(i)) { |
Aurelien Jarno | e590d4e | 2012-09-11 12:31:21 +0200 | [diff] [blame] | 146 | return i; |
Richard Henderson | 4c868ce | 2020-04-23 09:02:23 -0700 | [diff] [blame] | 147 | } else if (i->kind > ts->kind) { |
| 148 | if (i->kind == TEMP_GLOBAL) { |
| 149 | g = i; |
| 150 | } else if (i->kind == TEMP_LOCAL) { |
| 151 | l = i; |
Aurelien Jarno | e590d4e | 2012-09-11 12:31:21 +0200 | [diff] [blame] | 152 | } |
| 153 | } |
| 154 | } |
| 155 | |
Richard Henderson | 4c868ce | 2020-04-23 09:02:23 -0700 | [diff] [blame] | 156 | /* If we didn't find a better representation, return the same temp. */ |
| 157 | return g ? g : l ? l : ts; |
Aurelien Jarno | e590d4e | 2012-09-11 12:31:21 +0200 | [diff] [blame] | 158 | } |
| 159 | |
Richard Henderson | 6349039 | 2017-06-20 13:43:15 -0700 | [diff] [blame] | 160 | static bool ts_are_copies(TCGTemp *ts1, TCGTemp *ts2) |
Aurelien Jarno | e590d4e | 2012-09-11 12:31:21 +0200 | [diff] [blame] | 161 | { |
Richard Henderson | 6349039 | 2017-06-20 13:43:15 -0700 | [diff] [blame] | 162 | TCGTemp *i; |
Aurelien Jarno | e590d4e | 2012-09-11 12:31:21 +0200 | [diff] [blame] | 163 | |
Richard Henderson | 6349039 | 2017-06-20 13:43:15 -0700 | [diff] [blame] | 164 | if (ts1 == ts2) { |
Aurelien Jarno | e590d4e | 2012-09-11 12:31:21 +0200 | [diff] [blame] | 165 | return true; |
| 166 | } |
| 167 | |
Richard Henderson | 6349039 | 2017-06-20 13:43:15 -0700 | [diff] [blame] | 168 | if (!ts_is_copy(ts1) || !ts_is_copy(ts2)) { |
Aurelien Jarno | e590d4e | 2012-09-11 12:31:21 +0200 | [diff] [blame] | 169 | return false; |
| 170 | } |
| 171 | |
Richard Henderson | 6349039 | 2017-06-20 13:43:15 -0700 | [diff] [blame] | 172 | for (i = ts_info(ts1)->next_copy; i != ts1; i = ts_info(i)->next_copy) { |
| 173 | if (i == ts2) { |
Aurelien Jarno | e590d4e | 2012-09-11 12:31:21 +0200 | [diff] [blame] | 174 | return true; |
| 175 | } |
| 176 | } |
| 177 | |
| 178 | return false; |
| 179 | } |
| 180 | |
Richard Henderson | 6349039 | 2017-06-20 13:43:15 -0700 | [diff] [blame] | 181 | static bool args_are_copies(TCGArg arg1, TCGArg arg2) |
| 182 | { |
| 183 | return ts_are_copies(arg_temp(arg1), arg_temp(arg2)); |
| 184 | } |
| 185 | |
Richard Henderson | 6b99d5b | 2021-08-24 10:57:56 -0700 | [diff] [blame] | 186 | static bool tcg_opt_gen_mov(OptContext *ctx, TCGOp *op, TCGArg dst, TCGArg src) |
Kirill Batuzov | 22613af | 2011-07-07 16:37:13 +0400 | [diff] [blame] | 187 | { |
Richard Henderson | 6349039 | 2017-06-20 13:43:15 -0700 | [diff] [blame] | 188 | TCGTemp *dst_ts = arg_temp(dst); |
| 189 | TCGTemp *src_ts = arg_temp(src); |
Richard Henderson | 170ba88 | 2017-11-22 09:07:11 +0100 | [diff] [blame] | 190 | const TCGOpDef *def; |
Richard Henderson | 6fcb98e | 2020-03-30 17:44:30 -0700 | [diff] [blame] | 191 | TempOptInfo *di; |
| 192 | TempOptInfo *si; |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 193 | uint64_t z_mask; |
Richard Henderson | 6349039 | 2017-06-20 13:43:15 -0700 | [diff] [blame] | 194 | TCGOpcode new_op; |
| 195 | |
| 196 | if (ts_are_copies(dst_ts, src_ts)) { |
Richard Henderson | dc84988 | 2021-08-24 07:13:45 -0700 | [diff] [blame] | 197 | tcg_op_remove(ctx->tcg, op); |
Richard Henderson | 6b99d5b | 2021-08-24 10:57:56 -0700 | [diff] [blame] | 198 | return true; |
Aurelien Jarno | 5365718 | 2015-06-04 21:53:25 +0200 | [diff] [blame] | 199 | } |
| 200 | |
Richard Henderson | 6349039 | 2017-06-20 13:43:15 -0700 | [diff] [blame] | 201 | reset_ts(dst_ts); |
| 202 | di = ts_info(dst_ts); |
| 203 | si = ts_info(src_ts); |
Richard Henderson | 170ba88 | 2017-11-22 09:07:11 +0100 | [diff] [blame] | 204 | def = &tcg_op_defs[op->opc]; |
| 205 | if (def->flags & TCG_OPF_VECTOR) { |
| 206 | new_op = INDEX_op_mov_vec; |
| 207 | } else if (def->flags & TCG_OPF_64BIT) { |
| 208 | new_op = INDEX_op_mov_i64; |
| 209 | } else { |
| 210 | new_op = INDEX_op_mov_i32; |
| 211 | } |
Richard Henderson | c45cb8b | 2014-09-19 13:49:15 -0700 | [diff] [blame] | 212 | op->opc = new_op; |
Richard Henderson | 170ba88 | 2017-11-22 09:07:11 +0100 | [diff] [blame] | 213 | /* TCGOP_VECL and TCGOP_VECE remain unchanged. */ |
Richard Henderson | 6349039 | 2017-06-20 13:43:15 -0700 | [diff] [blame] | 214 | op->args[0] = dst; |
| 215 | op->args[1] = src; |
Richard Henderson | a62f6f5 | 2014-05-22 10:59:12 -0700 | [diff] [blame] | 216 | |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 217 | z_mask = si->z_mask; |
Richard Henderson | 24666ba | 2014-05-22 11:14:10 -0700 | [diff] [blame] | 218 | if (TCG_TARGET_REG_BITS > 32 && new_op == INDEX_op_mov_i32) { |
| 219 | /* High bits of the destination are now garbage. */ |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 220 | z_mask |= ~0xffffffffull; |
Richard Henderson | 24666ba | 2014-05-22 11:14:10 -0700 | [diff] [blame] | 221 | } |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 222 | di->z_mask = z_mask; |
Richard Henderson | 24666ba | 2014-05-22 11:14:10 -0700 | [diff] [blame] | 223 | |
Richard Henderson | 6349039 | 2017-06-20 13:43:15 -0700 | [diff] [blame] | 224 | if (src_ts->type == dst_ts->type) { |
Richard Henderson | 6fcb98e | 2020-03-30 17:44:30 -0700 | [diff] [blame] | 225 | TempOptInfo *ni = ts_info(si->next_copy); |
Richard Henderson | 6349039 | 2017-06-20 13:43:15 -0700 | [diff] [blame] | 226 | |
| 227 | di->next_copy = si->next_copy; |
| 228 | di->prev_copy = src_ts; |
| 229 | ni->prev_copy = dst_ts; |
| 230 | si->next_copy = dst_ts; |
| 231 | di->is_const = si->is_const; |
| 232 | di->val = si->val; |
Paolo Bonzini | 3a9d8b1 | 2013-01-11 15:42:52 -0800 | [diff] [blame] | 233 | } |
Richard Henderson | 6b99d5b | 2021-08-24 10:57:56 -0700 | [diff] [blame] | 234 | return true; |
Kirill Batuzov | 22613af | 2011-07-07 16:37:13 +0400 | [diff] [blame] | 235 | } |
| 236 | |
Richard Henderson | 6b99d5b | 2021-08-24 10:57:56 -0700 | [diff] [blame] | 237 | static bool tcg_opt_gen_movi(OptContext *ctx, TCGOp *op, |
Richard Henderson | dc84988 | 2021-08-24 07:13:45 -0700 | [diff] [blame] | 238 | TCGArg dst, uint64_t val) |
Richard Henderson | 8fe35e0 | 2020-03-30 20:42:43 -0700 | [diff] [blame] | 239 | { |
| 240 | const TCGOpDef *def = &tcg_op_defs[op->opc]; |
| 241 | TCGType type; |
| 242 | TCGTemp *tv; |
| 243 | |
| 244 | if (def->flags & TCG_OPF_VECTOR) { |
| 245 | type = TCGOP_VECL(op) + TCG_TYPE_V64; |
| 246 | } else if (def->flags & TCG_OPF_64BIT) { |
| 247 | type = TCG_TYPE_I64; |
| 248 | } else { |
| 249 | type = TCG_TYPE_I32; |
| 250 | } |
| 251 | |
| 252 | /* Convert movi to mov with constant temp. */ |
| 253 | tv = tcg_constant_internal(type, val); |
Richard Henderson | 3b3f847 | 2021-08-23 22:06:31 -0700 | [diff] [blame] | 254 | init_ts_info(ctx, tv); |
Richard Henderson | 6b99d5b | 2021-08-24 10:57:56 -0700 | [diff] [blame] | 255 | return tcg_opt_gen_mov(ctx, op, dst, temp_arg(tv)); |
Richard Henderson | 8fe35e0 | 2020-03-30 20:42:43 -0700 | [diff] [blame] | 256 | } |
| 257 | |
Richard Henderson | 5479554 | 2020-09-06 16:21:32 -0700 | [diff] [blame] | 258 | static uint64_t do_constant_folding_2(TCGOpcode op, uint64_t x, uint64_t y) |
Kirill Batuzov | 53108fb | 2011-07-07 16:37:14 +0400 | [diff] [blame] | 259 | { |
Richard Henderson | 0327152 | 2013-08-14 14:35:56 -0700 | [diff] [blame] | 260 | uint64_t l64, h64; |
| 261 | |
Kirill Batuzov | 53108fb | 2011-07-07 16:37:14 +0400 | [diff] [blame] | 262 | switch (op) { |
| 263 | CASE_OP_32_64(add): |
| 264 | return x + y; |
| 265 | |
| 266 | CASE_OP_32_64(sub): |
| 267 | return x - y; |
| 268 | |
| 269 | CASE_OP_32_64(mul): |
| 270 | return x * y; |
| 271 | |
Kirill Batuzov | 9a81090 | 2011-07-07 16:37:15 +0400 | [diff] [blame] | 272 | CASE_OP_32_64(and): |
| 273 | return x & y; |
| 274 | |
| 275 | CASE_OP_32_64(or): |
| 276 | return x | y; |
| 277 | |
| 278 | CASE_OP_32_64(xor): |
| 279 | return x ^ y; |
| 280 | |
Kirill Batuzov | 55c0975 | 2011-07-07 16:37:16 +0400 | [diff] [blame] | 281 | case INDEX_op_shl_i32: |
Richard Henderson | 50c5c4d | 2014-03-18 07:45:39 -0700 | [diff] [blame] | 282 | return (uint32_t)x << (y & 31); |
Kirill Batuzov | 55c0975 | 2011-07-07 16:37:16 +0400 | [diff] [blame] | 283 | |
Kirill Batuzov | 55c0975 | 2011-07-07 16:37:16 +0400 | [diff] [blame] | 284 | case INDEX_op_shl_i64: |
Richard Henderson | 50c5c4d | 2014-03-18 07:45:39 -0700 | [diff] [blame] | 285 | return (uint64_t)x << (y & 63); |
Kirill Batuzov | 55c0975 | 2011-07-07 16:37:16 +0400 | [diff] [blame] | 286 | |
| 287 | case INDEX_op_shr_i32: |
Richard Henderson | 50c5c4d | 2014-03-18 07:45:39 -0700 | [diff] [blame] | 288 | return (uint32_t)x >> (y & 31); |
Kirill Batuzov | 55c0975 | 2011-07-07 16:37:16 +0400 | [diff] [blame] | 289 | |
Kirill Batuzov | 55c0975 | 2011-07-07 16:37:16 +0400 | [diff] [blame] | 290 | case INDEX_op_shr_i64: |
Richard Henderson | 50c5c4d | 2014-03-18 07:45:39 -0700 | [diff] [blame] | 291 | return (uint64_t)x >> (y & 63); |
Kirill Batuzov | 55c0975 | 2011-07-07 16:37:16 +0400 | [diff] [blame] | 292 | |
| 293 | case INDEX_op_sar_i32: |
Richard Henderson | 50c5c4d | 2014-03-18 07:45:39 -0700 | [diff] [blame] | 294 | return (int32_t)x >> (y & 31); |
Kirill Batuzov | 55c0975 | 2011-07-07 16:37:16 +0400 | [diff] [blame] | 295 | |
Kirill Batuzov | 55c0975 | 2011-07-07 16:37:16 +0400 | [diff] [blame] | 296 | case INDEX_op_sar_i64: |
Richard Henderson | 50c5c4d | 2014-03-18 07:45:39 -0700 | [diff] [blame] | 297 | return (int64_t)x >> (y & 63); |
Kirill Batuzov | 55c0975 | 2011-07-07 16:37:16 +0400 | [diff] [blame] | 298 | |
| 299 | case INDEX_op_rotr_i32: |
Richard Henderson | 50c5c4d | 2014-03-18 07:45:39 -0700 | [diff] [blame] | 300 | return ror32(x, y & 31); |
Kirill Batuzov | 55c0975 | 2011-07-07 16:37:16 +0400 | [diff] [blame] | 301 | |
Kirill Batuzov | 55c0975 | 2011-07-07 16:37:16 +0400 | [diff] [blame] | 302 | case INDEX_op_rotr_i64: |
Richard Henderson | 50c5c4d | 2014-03-18 07:45:39 -0700 | [diff] [blame] | 303 | return ror64(x, y & 63); |
Kirill Batuzov | 55c0975 | 2011-07-07 16:37:16 +0400 | [diff] [blame] | 304 | |
| 305 | case INDEX_op_rotl_i32: |
Richard Henderson | 50c5c4d | 2014-03-18 07:45:39 -0700 | [diff] [blame] | 306 | return rol32(x, y & 31); |
Kirill Batuzov | 55c0975 | 2011-07-07 16:37:16 +0400 | [diff] [blame] | 307 | |
Kirill Batuzov | 55c0975 | 2011-07-07 16:37:16 +0400 | [diff] [blame] | 308 | case INDEX_op_rotl_i64: |
Richard Henderson | 50c5c4d | 2014-03-18 07:45:39 -0700 | [diff] [blame] | 309 | return rol64(x, y & 63); |
Kirill Batuzov | 55c0975 | 2011-07-07 16:37:16 +0400 | [diff] [blame] | 310 | |
Richard Henderson | 25c4d9c | 2011-08-17 14:11:46 -0700 | [diff] [blame] | 311 | CASE_OP_32_64(not): |
Kirill Batuzov | a640f03 | 2011-07-07 16:37:17 +0400 | [diff] [blame] | 312 | return ~x; |
| 313 | |
Richard Henderson | cb25c80 | 2011-08-17 14:11:47 -0700 | [diff] [blame] | 314 | CASE_OP_32_64(neg): |
| 315 | return -x; |
| 316 | |
| 317 | CASE_OP_32_64(andc): |
| 318 | return x & ~y; |
| 319 | |
| 320 | CASE_OP_32_64(orc): |
| 321 | return x | ~y; |
| 322 | |
| 323 | CASE_OP_32_64(eqv): |
| 324 | return ~(x ^ y); |
| 325 | |
| 326 | CASE_OP_32_64(nand): |
| 327 | return ~(x & y); |
| 328 | |
| 329 | CASE_OP_32_64(nor): |
| 330 | return ~(x | y); |
| 331 | |
Richard Henderson | 0e28d00 | 2016-11-16 09:23:28 +0100 | [diff] [blame] | 332 | case INDEX_op_clz_i32: |
| 333 | return (uint32_t)x ? clz32(x) : y; |
| 334 | |
| 335 | case INDEX_op_clz_i64: |
| 336 | return x ? clz64(x) : y; |
| 337 | |
| 338 | case INDEX_op_ctz_i32: |
| 339 | return (uint32_t)x ? ctz32(x) : y; |
| 340 | |
| 341 | case INDEX_op_ctz_i64: |
| 342 | return x ? ctz64(x) : y; |
| 343 | |
Richard Henderson | a768e4e | 2016-11-21 11:13:39 +0100 | [diff] [blame] | 344 | case INDEX_op_ctpop_i32: |
| 345 | return ctpop32(x); |
| 346 | |
| 347 | case INDEX_op_ctpop_i64: |
| 348 | return ctpop64(x); |
| 349 | |
Richard Henderson | 25c4d9c | 2011-08-17 14:11:46 -0700 | [diff] [blame] | 350 | CASE_OP_32_64(ext8s): |
Kirill Batuzov | a640f03 | 2011-07-07 16:37:17 +0400 | [diff] [blame] | 351 | return (int8_t)x; |
| 352 | |
Richard Henderson | 25c4d9c | 2011-08-17 14:11:46 -0700 | [diff] [blame] | 353 | CASE_OP_32_64(ext16s): |
Kirill Batuzov | a640f03 | 2011-07-07 16:37:17 +0400 | [diff] [blame] | 354 | return (int16_t)x; |
| 355 | |
Richard Henderson | 25c4d9c | 2011-08-17 14:11:46 -0700 | [diff] [blame] | 356 | CASE_OP_32_64(ext8u): |
Kirill Batuzov | a640f03 | 2011-07-07 16:37:17 +0400 | [diff] [blame] | 357 | return (uint8_t)x; |
| 358 | |
Richard Henderson | 25c4d9c | 2011-08-17 14:11:46 -0700 | [diff] [blame] | 359 | CASE_OP_32_64(ext16u): |
Kirill Batuzov | a640f03 | 2011-07-07 16:37:17 +0400 | [diff] [blame] | 360 | return (uint16_t)x; |
| 361 | |
Richard Henderson | 6498594 | 2018-11-20 08:53:34 +0100 | [diff] [blame] | 362 | CASE_OP_32_64(bswap16): |
Richard Henderson | 0b76ff8 | 2021-06-13 13:04:00 -0700 | [diff] [blame] | 363 | x = bswap16(x); |
| 364 | return y & TCG_BSWAP_OS ? (int16_t)x : x; |
Richard Henderson | 6498594 | 2018-11-20 08:53:34 +0100 | [diff] [blame] | 365 | |
| 366 | CASE_OP_32_64(bswap32): |
Richard Henderson | 0b76ff8 | 2021-06-13 13:04:00 -0700 | [diff] [blame] | 367 | x = bswap32(x); |
| 368 | return y & TCG_BSWAP_OS ? (int32_t)x : x; |
Richard Henderson | 6498594 | 2018-11-20 08:53:34 +0100 | [diff] [blame] | 369 | |
| 370 | case INDEX_op_bswap64_i64: |
| 371 | return bswap64(x); |
| 372 | |
Aurelien Jarno | 8bcb5c8 | 2015-07-27 12:41:45 +0200 | [diff] [blame] | 373 | case INDEX_op_ext_i32_i64: |
Kirill Batuzov | a640f03 | 2011-07-07 16:37:17 +0400 | [diff] [blame] | 374 | case INDEX_op_ext32s_i64: |
| 375 | return (int32_t)x; |
| 376 | |
Aurelien Jarno | 8bcb5c8 | 2015-07-27 12:41:45 +0200 | [diff] [blame] | 377 | case INDEX_op_extu_i32_i64: |
Richard Henderson | 609ad70 | 2015-07-24 07:16:00 -0700 | [diff] [blame] | 378 | case INDEX_op_extrl_i64_i32: |
Kirill Batuzov | a640f03 | 2011-07-07 16:37:17 +0400 | [diff] [blame] | 379 | case INDEX_op_ext32u_i64: |
| 380 | return (uint32_t)x; |
Kirill Batuzov | a640f03 | 2011-07-07 16:37:17 +0400 | [diff] [blame] | 381 | |
Richard Henderson | 609ad70 | 2015-07-24 07:16:00 -0700 | [diff] [blame] | 382 | case INDEX_op_extrh_i64_i32: |
| 383 | return (uint64_t)x >> 32; |
| 384 | |
Richard Henderson | 0327152 | 2013-08-14 14:35:56 -0700 | [diff] [blame] | 385 | case INDEX_op_muluh_i32: |
| 386 | return ((uint64_t)(uint32_t)x * (uint32_t)y) >> 32; |
| 387 | case INDEX_op_mulsh_i32: |
| 388 | return ((int64_t)(int32_t)x * (int32_t)y) >> 32; |
| 389 | |
| 390 | case INDEX_op_muluh_i64: |
| 391 | mulu64(&l64, &h64, x, y); |
| 392 | return h64; |
| 393 | case INDEX_op_mulsh_i64: |
| 394 | muls64(&l64, &h64, x, y); |
| 395 | return h64; |
| 396 | |
Richard Henderson | 01547f7 | 2013-08-14 15:22:46 -0700 | [diff] [blame] | 397 | case INDEX_op_div_i32: |
| 398 | /* Avoid crashing on divide by zero, otherwise undefined. */ |
| 399 | return (int32_t)x / ((int32_t)y ? : 1); |
| 400 | case INDEX_op_divu_i32: |
| 401 | return (uint32_t)x / ((uint32_t)y ? : 1); |
| 402 | case INDEX_op_div_i64: |
| 403 | return (int64_t)x / ((int64_t)y ? : 1); |
| 404 | case INDEX_op_divu_i64: |
| 405 | return (uint64_t)x / ((uint64_t)y ? : 1); |
| 406 | |
| 407 | case INDEX_op_rem_i32: |
| 408 | return (int32_t)x % ((int32_t)y ? : 1); |
| 409 | case INDEX_op_remu_i32: |
| 410 | return (uint32_t)x % ((uint32_t)y ? : 1); |
| 411 | case INDEX_op_rem_i64: |
| 412 | return (int64_t)x % ((int64_t)y ? : 1); |
| 413 | case INDEX_op_remu_i64: |
| 414 | return (uint64_t)x % ((uint64_t)y ? : 1); |
| 415 | |
Kirill Batuzov | 53108fb | 2011-07-07 16:37:14 +0400 | [diff] [blame] | 416 | default: |
| 417 | fprintf(stderr, |
| 418 | "Unrecognized operation %d in do_constant_folding.\n", op); |
| 419 | tcg_abort(); |
| 420 | } |
| 421 | } |
| 422 | |
Richard Henderson | 5479554 | 2020-09-06 16:21:32 -0700 | [diff] [blame] | 423 | static uint64_t do_constant_folding(TCGOpcode op, uint64_t x, uint64_t y) |
Kirill Batuzov | 53108fb | 2011-07-07 16:37:14 +0400 | [diff] [blame] | 424 | { |
Richard Henderson | 170ba88 | 2017-11-22 09:07:11 +0100 | [diff] [blame] | 425 | const TCGOpDef *def = &tcg_op_defs[op]; |
Richard Henderson | 5479554 | 2020-09-06 16:21:32 -0700 | [diff] [blame] | 426 | uint64_t res = do_constant_folding_2(op, x, y); |
Richard Henderson | 170ba88 | 2017-11-22 09:07:11 +0100 | [diff] [blame] | 427 | if (!(def->flags & TCG_OPF_64BIT)) { |
Aurelien Jarno | 29f3ff8 | 2015-07-10 18:03:31 +0200 | [diff] [blame] | 428 | res = (int32_t)res; |
Kirill Batuzov | 53108fb | 2011-07-07 16:37:14 +0400 | [diff] [blame] | 429 | } |
Kirill Batuzov | 53108fb | 2011-07-07 16:37:14 +0400 | [diff] [blame] | 430 | return res; |
| 431 | } |
| 432 | |
Richard Henderson | 9519da7 | 2012-10-02 11:32:26 -0700 | [diff] [blame] | 433 | static bool do_constant_folding_cond_32(uint32_t x, uint32_t y, TCGCond c) |
| 434 | { |
| 435 | switch (c) { |
| 436 | case TCG_COND_EQ: |
| 437 | return x == y; |
| 438 | case TCG_COND_NE: |
| 439 | return x != y; |
| 440 | case TCG_COND_LT: |
| 441 | return (int32_t)x < (int32_t)y; |
| 442 | case TCG_COND_GE: |
| 443 | return (int32_t)x >= (int32_t)y; |
| 444 | case TCG_COND_LE: |
| 445 | return (int32_t)x <= (int32_t)y; |
| 446 | case TCG_COND_GT: |
| 447 | return (int32_t)x > (int32_t)y; |
| 448 | case TCG_COND_LTU: |
| 449 | return x < y; |
| 450 | case TCG_COND_GEU: |
| 451 | return x >= y; |
| 452 | case TCG_COND_LEU: |
| 453 | return x <= y; |
| 454 | case TCG_COND_GTU: |
| 455 | return x > y; |
| 456 | default: |
| 457 | tcg_abort(); |
| 458 | } |
| 459 | } |
| 460 | |
| 461 | static bool do_constant_folding_cond_64(uint64_t x, uint64_t y, TCGCond c) |
| 462 | { |
| 463 | switch (c) { |
| 464 | case TCG_COND_EQ: |
| 465 | return x == y; |
| 466 | case TCG_COND_NE: |
| 467 | return x != y; |
| 468 | case TCG_COND_LT: |
| 469 | return (int64_t)x < (int64_t)y; |
| 470 | case TCG_COND_GE: |
| 471 | return (int64_t)x >= (int64_t)y; |
| 472 | case TCG_COND_LE: |
| 473 | return (int64_t)x <= (int64_t)y; |
| 474 | case TCG_COND_GT: |
| 475 | return (int64_t)x > (int64_t)y; |
| 476 | case TCG_COND_LTU: |
| 477 | return x < y; |
| 478 | case TCG_COND_GEU: |
| 479 | return x >= y; |
| 480 | case TCG_COND_LEU: |
| 481 | return x <= y; |
| 482 | case TCG_COND_GTU: |
| 483 | return x > y; |
| 484 | default: |
| 485 | tcg_abort(); |
| 486 | } |
| 487 | } |
| 488 | |
| 489 | static bool do_constant_folding_cond_eq(TCGCond c) |
| 490 | { |
| 491 | switch (c) { |
| 492 | case TCG_COND_GT: |
| 493 | case TCG_COND_LTU: |
| 494 | case TCG_COND_LT: |
| 495 | case TCG_COND_GTU: |
| 496 | case TCG_COND_NE: |
| 497 | return 0; |
| 498 | case TCG_COND_GE: |
| 499 | case TCG_COND_GEU: |
| 500 | case TCG_COND_LE: |
| 501 | case TCG_COND_LEU: |
| 502 | case TCG_COND_EQ: |
| 503 | return 1; |
| 504 | default: |
| 505 | tcg_abort(); |
| 506 | } |
| 507 | } |
| 508 | |
Richard Henderson | 8d57bf1 | 2021-08-24 08:34:27 -0700 | [diff] [blame] | 509 | /* |
| 510 | * Return -1 if the condition can't be simplified, |
| 511 | * and the result of the condition (0 or 1) if it can. |
| 512 | */ |
| 513 | static int do_constant_folding_cond(TCGOpcode op, TCGArg x, |
| 514 | TCGArg y, TCGCond c) |
Aurelien Jarno | f8dd19e | 2012-09-06 16:47:14 +0200 | [diff] [blame] | 515 | { |
Richard Henderson | 5479554 | 2020-09-06 16:21:32 -0700 | [diff] [blame] | 516 | uint64_t xv = arg_info(x)->val; |
| 517 | uint64_t yv = arg_info(y)->val; |
| 518 | |
Richard Henderson | 6349039 | 2017-06-20 13:43:15 -0700 | [diff] [blame] | 519 | if (arg_is_const(x) && arg_is_const(y)) { |
Richard Henderson | 170ba88 | 2017-11-22 09:07:11 +0100 | [diff] [blame] | 520 | const TCGOpDef *def = &tcg_op_defs[op]; |
| 521 | tcg_debug_assert(!(def->flags & TCG_OPF_VECTOR)); |
| 522 | if (def->flags & TCG_OPF_64BIT) { |
Richard Henderson | 6349039 | 2017-06-20 13:43:15 -0700 | [diff] [blame] | 523 | return do_constant_folding_cond_64(xv, yv, c); |
Richard Henderson | 170ba88 | 2017-11-22 09:07:11 +0100 | [diff] [blame] | 524 | } else { |
| 525 | return do_constant_folding_cond_32(xv, yv, c); |
Aurelien Jarno | f8dd19e | 2012-09-06 16:47:14 +0200 | [diff] [blame] | 526 | } |
Richard Henderson | 6349039 | 2017-06-20 13:43:15 -0700 | [diff] [blame] | 527 | } else if (args_are_copies(x, y)) { |
Richard Henderson | 9519da7 | 2012-10-02 11:32:26 -0700 | [diff] [blame] | 528 | return do_constant_folding_cond_eq(c); |
Richard Henderson | 6349039 | 2017-06-20 13:43:15 -0700 | [diff] [blame] | 529 | } else if (arg_is_const(y) && yv == 0) { |
Aurelien Jarno | b336ceb | 2012-09-18 19:37:00 +0200 | [diff] [blame] | 530 | switch (c) { |
| 531 | case TCG_COND_LTU: |
| 532 | return 0; |
| 533 | case TCG_COND_GEU: |
| 534 | return 1; |
| 535 | default: |
Richard Henderson | 8d57bf1 | 2021-08-24 08:34:27 -0700 | [diff] [blame] | 536 | return -1; |
Aurelien Jarno | b336ceb | 2012-09-18 19:37:00 +0200 | [diff] [blame] | 537 | } |
Aurelien Jarno | f8dd19e | 2012-09-06 16:47:14 +0200 | [diff] [blame] | 538 | } |
Richard Henderson | 8d57bf1 | 2021-08-24 08:34:27 -0700 | [diff] [blame] | 539 | return -1; |
Aurelien Jarno | f8dd19e | 2012-09-06 16:47:14 +0200 | [diff] [blame] | 540 | } |
| 541 | |
Richard Henderson | 8d57bf1 | 2021-08-24 08:34:27 -0700 | [diff] [blame] | 542 | /* |
| 543 | * Return -1 if the condition can't be simplified, |
| 544 | * and the result of the condition (0 or 1) if it can. |
| 545 | */ |
| 546 | static int do_constant_folding_cond2(TCGArg *p1, TCGArg *p2, TCGCond c) |
Richard Henderson | 6c4382f | 2012-10-02 11:32:27 -0700 | [diff] [blame] | 547 | { |
| 548 | TCGArg al = p1[0], ah = p1[1]; |
| 549 | TCGArg bl = p2[0], bh = p2[1]; |
| 550 | |
Richard Henderson | 6349039 | 2017-06-20 13:43:15 -0700 | [diff] [blame] | 551 | if (arg_is_const(bl) && arg_is_const(bh)) { |
| 552 | tcg_target_ulong blv = arg_info(bl)->val; |
| 553 | tcg_target_ulong bhv = arg_info(bh)->val; |
| 554 | uint64_t b = deposit64(blv, 32, 32, bhv); |
Richard Henderson | 6c4382f | 2012-10-02 11:32:27 -0700 | [diff] [blame] | 555 | |
Richard Henderson | 6349039 | 2017-06-20 13:43:15 -0700 | [diff] [blame] | 556 | if (arg_is_const(al) && arg_is_const(ah)) { |
| 557 | tcg_target_ulong alv = arg_info(al)->val; |
| 558 | tcg_target_ulong ahv = arg_info(ah)->val; |
| 559 | uint64_t a = deposit64(alv, 32, 32, ahv); |
Richard Henderson | 6c4382f | 2012-10-02 11:32:27 -0700 | [diff] [blame] | 560 | return do_constant_folding_cond_64(a, b, c); |
| 561 | } |
| 562 | if (b == 0) { |
| 563 | switch (c) { |
| 564 | case TCG_COND_LTU: |
| 565 | return 0; |
| 566 | case TCG_COND_GEU: |
| 567 | return 1; |
| 568 | default: |
| 569 | break; |
| 570 | } |
| 571 | } |
| 572 | } |
Richard Henderson | 6349039 | 2017-06-20 13:43:15 -0700 | [diff] [blame] | 573 | if (args_are_copies(al, bl) && args_are_copies(ah, bh)) { |
Richard Henderson | 6c4382f | 2012-10-02 11:32:27 -0700 | [diff] [blame] | 574 | return do_constant_folding_cond_eq(c); |
| 575 | } |
Richard Henderson | 8d57bf1 | 2021-08-24 08:34:27 -0700 | [diff] [blame] | 576 | return -1; |
Richard Henderson | 6c4382f | 2012-10-02 11:32:27 -0700 | [diff] [blame] | 577 | } |
| 578 | |
Richard Henderson | 24c9ae4 | 2012-10-02 11:32:21 -0700 | [diff] [blame] | 579 | static bool swap_commutative(TCGArg dest, TCGArg *p1, TCGArg *p2) |
| 580 | { |
| 581 | TCGArg a1 = *p1, a2 = *p2; |
| 582 | int sum = 0; |
Richard Henderson | 6349039 | 2017-06-20 13:43:15 -0700 | [diff] [blame] | 583 | sum += arg_is_const(a1); |
| 584 | sum -= arg_is_const(a2); |
Richard Henderson | 24c9ae4 | 2012-10-02 11:32:21 -0700 | [diff] [blame] | 585 | |
| 586 | /* Prefer the constant in second argument, and then the form |
| 587 | op a, a, b, which is better handled on non-RISC hosts. */ |
| 588 | if (sum > 0 || (sum == 0 && dest == a2)) { |
| 589 | *p1 = a2; |
| 590 | *p2 = a1; |
| 591 | return true; |
| 592 | } |
| 593 | return false; |
| 594 | } |
| 595 | |
Richard Henderson | 0bfcb86 | 2012-10-02 11:32:23 -0700 | [diff] [blame] | 596 | static bool swap_commutative2(TCGArg *p1, TCGArg *p2) |
| 597 | { |
| 598 | int sum = 0; |
Richard Henderson | 6349039 | 2017-06-20 13:43:15 -0700 | [diff] [blame] | 599 | sum += arg_is_const(p1[0]); |
| 600 | sum += arg_is_const(p1[1]); |
| 601 | sum -= arg_is_const(p2[0]); |
| 602 | sum -= arg_is_const(p2[1]); |
Richard Henderson | 0bfcb86 | 2012-10-02 11:32:23 -0700 | [diff] [blame] | 603 | if (sum > 0) { |
| 604 | TCGArg t; |
| 605 | t = p1[0], p1[0] = p2[0], p2[0] = t; |
| 606 | t = p1[1], p1[1] = p2[1], p2[1] = t; |
| 607 | return true; |
| 608 | } |
| 609 | return false; |
| 610 | } |
| 611 | |
Richard Henderson | e2577ea | 2021-08-24 08:00:48 -0700 | [diff] [blame] | 612 | static void init_arguments(OptContext *ctx, TCGOp *op, int nb_args) |
| 613 | { |
| 614 | for (int i = 0; i < nb_args; i++) { |
| 615 | TCGTemp *ts = arg_temp(op->args[i]); |
| 616 | if (ts) { |
| 617 | init_ts_info(ctx, ts); |
| 618 | } |
| 619 | } |
| 620 | } |
| 621 | |
Richard Henderson | 8774dde | 2021-08-24 08:04:47 -0700 | [diff] [blame] | 622 | static void copy_propagate(OptContext *ctx, TCGOp *op, |
| 623 | int nb_oargs, int nb_iargs) |
| 624 | { |
| 625 | TCGContext *s = ctx->tcg; |
| 626 | |
| 627 | for (int i = nb_oargs; i < nb_oargs + nb_iargs; i++) { |
| 628 | TCGTemp *ts = arg_temp(op->args[i]); |
| 629 | if (ts && ts_is_copy(ts)) { |
| 630 | op->args[i] = temp_arg(find_better_copy(s, ts)); |
| 631 | } |
| 632 | } |
| 633 | } |
| 634 | |
Richard Henderson | 137f1f4 | 2021-08-24 08:49:25 -0700 | [diff] [blame] | 635 | static void finish_folding(OptContext *ctx, TCGOp *op) |
| 636 | { |
| 637 | const TCGOpDef *def = &tcg_op_defs[op->opc]; |
| 638 | int i, nb_oargs; |
| 639 | |
| 640 | /* |
| 641 | * For an opcode that ends a BB, reset all temp data. |
| 642 | * We do no cross-BB optimization. |
| 643 | */ |
| 644 | if (def->flags & TCG_OPF_BB_END) { |
| 645 | memset(&ctx->temps_used, 0, sizeof(ctx->temps_used)); |
| 646 | ctx->prev_mb = NULL; |
| 647 | return; |
| 648 | } |
| 649 | |
| 650 | nb_oargs = def->nb_oargs; |
| 651 | for (i = 0; i < nb_oargs; i++) { |
| 652 | reset_temp(op->args[i]); |
| 653 | /* |
| 654 | * Save the corresponding known-zero bits mask for the |
| 655 | * first output argument (only one supported so far). |
| 656 | */ |
| 657 | if (i == 0) { |
| 658 | arg_info(op->args[i])->z_mask = ctx->z_mask; |
| 659 | } |
| 660 | } |
| 661 | } |
| 662 | |
Richard Henderson | 2f9f08b | 2021-08-25 12:03:48 -0700 | [diff] [blame] | 663 | /* |
| 664 | * The fold_* functions return true when processing is complete, |
| 665 | * usually by folding the operation to a constant or to a copy, |
| 666 | * and calling tcg_opt_gen_{mov,movi}. They may do other things, |
| 667 | * like collect information about the value produced, for use in |
| 668 | * optimizing a subsequent operation. |
| 669 | * |
| 670 | * These first fold_* functions are all helpers, used by other |
| 671 | * folders for more specific operations. |
| 672 | */ |
| 673 | |
| 674 | static bool fold_const1(OptContext *ctx, TCGOp *op) |
| 675 | { |
| 676 | if (arg_is_const(op->args[1])) { |
| 677 | uint64_t t; |
| 678 | |
| 679 | t = arg_info(op->args[1])->val; |
| 680 | t = do_constant_folding(op->opc, t, 0); |
| 681 | return tcg_opt_gen_movi(ctx, op, op->args[0], t); |
| 682 | } |
| 683 | return false; |
| 684 | } |
| 685 | |
| 686 | static bool fold_const2(OptContext *ctx, TCGOp *op) |
| 687 | { |
| 688 | if (arg_is_const(op->args[1]) && arg_is_const(op->args[2])) { |
| 689 | uint64_t t1 = arg_info(op->args[1])->val; |
| 690 | uint64_t t2 = arg_info(op->args[2])->val; |
| 691 | |
| 692 | t1 = do_constant_folding(op->opc, t1, t2); |
| 693 | return tcg_opt_gen_movi(ctx, op, op->args[0], t1); |
| 694 | } |
| 695 | return false; |
| 696 | } |
| 697 | |
| 698 | /* |
| 699 | * These outermost fold_<op> functions are sorted alphabetically. |
| 700 | */ |
| 701 | |
| 702 | static bool fold_add(OptContext *ctx, TCGOp *op) |
| 703 | { |
| 704 | return fold_const2(ctx, op); |
| 705 | } |
| 706 | |
Richard Henderson | e3f7dc2 | 2021-08-24 10:30:38 -0700 | [diff] [blame] | 707 | static bool fold_addsub2_i32(OptContext *ctx, TCGOp *op, bool add) |
| 708 | { |
| 709 | if (arg_is_const(op->args[2]) && arg_is_const(op->args[3]) && |
| 710 | arg_is_const(op->args[4]) && arg_is_const(op->args[5])) { |
| 711 | uint32_t al = arg_info(op->args[2])->val; |
| 712 | uint32_t ah = arg_info(op->args[3])->val; |
| 713 | uint32_t bl = arg_info(op->args[4])->val; |
| 714 | uint32_t bh = arg_info(op->args[5])->val; |
| 715 | uint64_t a = ((uint64_t)ah << 32) | al; |
| 716 | uint64_t b = ((uint64_t)bh << 32) | bl; |
| 717 | TCGArg rl, rh; |
| 718 | TCGOp *op2 = tcg_op_insert_before(ctx->tcg, op, INDEX_op_mov_i32); |
| 719 | |
| 720 | if (add) { |
| 721 | a += b; |
| 722 | } else { |
| 723 | a -= b; |
| 724 | } |
| 725 | |
| 726 | rl = op->args[0]; |
| 727 | rh = op->args[1]; |
| 728 | tcg_opt_gen_movi(ctx, op, rl, (int32_t)a); |
| 729 | tcg_opt_gen_movi(ctx, op2, rh, (int32_t)(a >> 32)); |
| 730 | return true; |
| 731 | } |
| 732 | return false; |
| 733 | } |
| 734 | |
| 735 | static bool fold_add2_i32(OptContext *ctx, TCGOp *op) |
| 736 | { |
| 737 | return fold_addsub2_i32(ctx, op, true); |
| 738 | } |
| 739 | |
Richard Henderson | 2f9f08b | 2021-08-25 12:03:48 -0700 | [diff] [blame] | 740 | static bool fold_and(OptContext *ctx, TCGOp *op) |
| 741 | { |
| 742 | return fold_const2(ctx, op); |
| 743 | } |
| 744 | |
| 745 | static bool fold_andc(OptContext *ctx, TCGOp *op) |
| 746 | { |
| 747 | return fold_const2(ctx, op); |
| 748 | } |
| 749 | |
Richard Henderson | 079b080 | 2021-08-24 09:30:59 -0700 | [diff] [blame] | 750 | static bool fold_brcond(OptContext *ctx, TCGOp *op) |
| 751 | { |
| 752 | TCGCond cond = op->args[2]; |
| 753 | int i = do_constant_folding_cond(op->opc, op->args[0], op->args[1], cond); |
| 754 | |
| 755 | if (i == 0) { |
| 756 | tcg_op_remove(ctx->tcg, op); |
| 757 | return true; |
| 758 | } |
| 759 | if (i > 0) { |
| 760 | op->opc = INDEX_op_br; |
| 761 | op->args[0] = op->args[3]; |
| 762 | } |
| 763 | return false; |
| 764 | } |
| 765 | |
Richard Henderson | 764d2ab | 2021-08-24 09:22:11 -0700 | [diff] [blame] | 766 | static bool fold_brcond2(OptContext *ctx, TCGOp *op) |
| 767 | { |
| 768 | TCGCond cond = op->args[4]; |
| 769 | int i = do_constant_folding_cond2(&op->args[0], &op->args[2], cond); |
| 770 | TCGArg label = op->args[5]; |
| 771 | int inv = 0; |
| 772 | |
| 773 | if (i >= 0) { |
| 774 | goto do_brcond_const; |
| 775 | } |
| 776 | |
| 777 | switch (cond) { |
| 778 | case TCG_COND_LT: |
| 779 | case TCG_COND_GE: |
| 780 | /* |
| 781 | * Simplify LT/GE comparisons vs zero to a single compare |
| 782 | * vs the high word of the input. |
| 783 | */ |
| 784 | if (arg_is_const(op->args[2]) && arg_info(op->args[2])->val == 0 && |
| 785 | arg_is_const(op->args[3]) && arg_info(op->args[3])->val == 0) { |
| 786 | goto do_brcond_high; |
| 787 | } |
| 788 | break; |
| 789 | |
| 790 | case TCG_COND_NE: |
| 791 | inv = 1; |
| 792 | QEMU_FALLTHROUGH; |
| 793 | case TCG_COND_EQ: |
| 794 | /* |
| 795 | * Simplify EQ/NE comparisons where one of the pairs |
| 796 | * can be simplified. |
| 797 | */ |
| 798 | i = do_constant_folding_cond(INDEX_op_brcond_i32, op->args[0], |
| 799 | op->args[2], cond); |
| 800 | switch (i ^ inv) { |
| 801 | case 0: |
| 802 | goto do_brcond_const; |
| 803 | case 1: |
| 804 | goto do_brcond_high; |
| 805 | } |
| 806 | |
| 807 | i = do_constant_folding_cond(INDEX_op_brcond_i32, op->args[1], |
| 808 | op->args[3], cond); |
| 809 | switch (i ^ inv) { |
| 810 | case 0: |
| 811 | goto do_brcond_const; |
| 812 | case 1: |
| 813 | op->opc = INDEX_op_brcond_i32; |
| 814 | op->args[1] = op->args[2]; |
| 815 | op->args[2] = cond; |
| 816 | op->args[3] = label; |
| 817 | break; |
| 818 | } |
| 819 | break; |
| 820 | |
| 821 | default: |
| 822 | break; |
| 823 | |
| 824 | do_brcond_high: |
| 825 | op->opc = INDEX_op_brcond_i32; |
| 826 | op->args[0] = op->args[1]; |
| 827 | op->args[1] = op->args[3]; |
| 828 | op->args[2] = cond; |
| 829 | op->args[3] = label; |
| 830 | break; |
| 831 | |
| 832 | do_brcond_const: |
| 833 | if (i == 0) { |
| 834 | tcg_op_remove(ctx->tcg, op); |
| 835 | return true; |
| 836 | } |
| 837 | op->opc = INDEX_op_br; |
| 838 | op->args[0] = label; |
| 839 | break; |
| 840 | } |
| 841 | return false; |
| 842 | } |
| 843 | |
Richard Henderson | 5cf32be | 2021-08-24 08:17:08 -0700 | [diff] [blame] | 844 | static bool fold_call(OptContext *ctx, TCGOp *op) |
| 845 | { |
| 846 | TCGContext *s = ctx->tcg; |
| 847 | int nb_oargs = TCGOP_CALLO(op); |
| 848 | int nb_iargs = TCGOP_CALLI(op); |
| 849 | int flags, i; |
| 850 | |
| 851 | init_arguments(ctx, op, nb_oargs + nb_iargs); |
| 852 | copy_propagate(ctx, op, nb_oargs, nb_iargs); |
| 853 | |
| 854 | /* If the function reads or writes globals, reset temp data. */ |
| 855 | flags = tcg_call_flags(op); |
| 856 | if (!(flags & (TCG_CALL_NO_READ_GLOBALS | TCG_CALL_NO_WRITE_GLOBALS))) { |
| 857 | int nb_globals = s->nb_globals; |
| 858 | |
| 859 | for (i = 0; i < nb_globals; i++) { |
| 860 | if (test_bit(i, ctx->temps_used.l)) { |
| 861 | reset_ts(&ctx->tcg->temps[i]); |
| 862 | } |
| 863 | } |
| 864 | } |
| 865 | |
| 866 | /* Reset temp data for outputs. */ |
| 867 | for (i = 0; i < nb_oargs; i++) { |
| 868 | reset_temp(op->args[i]); |
| 869 | } |
| 870 | |
| 871 | /* Stop optimizing MB across calls. */ |
| 872 | ctx->prev_mb = NULL; |
| 873 | return true; |
| 874 | } |
| 875 | |
Richard Henderson | 30dd0bf | 2021-08-24 10:51:34 -0700 | [diff] [blame^] | 876 | static bool fold_count_zeros(OptContext *ctx, TCGOp *op) |
| 877 | { |
| 878 | if (arg_is_const(op->args[1])) { |
| 879 | uint64_t t = arg_info(op->args[1])->val; |
| 880 | |
| 881 | if (t != 0) { |
| 882 | t = do_constant_folding(op->opc, t, 0); |
| 883 | return tcg_opt_gen_movi(ctx, op, op->args[0], t); |
| 884 | } |
| 885 | return tcg_opt_gen_mov(ctx, op, op->args[0], op->args[2]); |
| 886 | } |
| 887 | return false; |
| 888 | } |
| 889 | |
Richard Henderson | 2f9f08b | 2021-08-25 12:03:48 -0700 | [diff] [blame] | 890 | static bool fold_ctpop(OptContext *ctx, TCGOp *op) |
| 891 | { |
| 892 | return fold_const1(ctx, op); |
| 893 | } |
| 894 | |
Richard Henderson | 1b1907b | 2021-08-24 10:47:04 -0700 | [diff] [blame] | 895 | static bool fold_deposit(OptContext *ctx, TCGOp *op) |
| 896 | { |
| 897 | if (arg_is_const(op->args[1]) && arg_is_const(op->args[2])) { |
| 898 | uint64_t t1 = arg_info(op->args[1])->val; |
| 899 | uint64_t t2 = arg_info(op->args[2])->val; |
| 900 | |
| 901 | t1 = deposit64(t1, op->args[3], op->args[4], t2); |
| 902 | return tcg_opt_gen_movi(ctx, op, op->args[0], t1); |
| 903 | } |
| 904 | return false; |
| 905 | } |
| 906 | |
Richard Henderson | 2f9f08b | 2021-08-25 12:03:48 -0700 | [diff] [blame] | 907 | static bool fold_divide(OptContext *ctx, TCGOp *op) |
| 908 | { |
| 909 | return fold_const2(ctx, op); |
| 910 | } |
| 911 | |
| 912 | static bool fold_eqv(OptContext *ctx, TCGOp *op) |
| 913 | { |
| 914 | return fold_const2(ctx, op); |
| 915 | } |
| 916 | |
Richard Henderson | b6617c8 | 2021-08-24 10:44:53 -0700 | [diff] [blame] | 917 | static bool fold_extract(OptContext *ctx, TCGOp *op) |
| 918 | { |
| 919 | if (arg_is_const(op->args[1])) { |
| 920 | uint64_t t; |
| 921 | |
| 922 | t = arg_info(op->args[1])->val; |
| 923 | t = extract64(t, op->args[2], op->args[3]); |
| 924 | return tcg_opt_gen_movi(ctx, op, op->args[0], t); |
| 925 | } |
| 926 | return false; |
| 927 | } |
| 928 | |
Richard Henderson | dcd0899 | 2021-08-24 10:41:39 -0700 | [diff] [blame] | 929 | static bool fold_extract2(OptContext *ctx, TCGOp *op) |
| 930 | { |
| 931 | if (arg_is_const(op->args[1]) && arg_is_const(op->args[2])) { |
| 932 | uint64_t v1 = arg_info(op->args[1])->val; |
| 933 | uint64_t v2 = arg_info(op->args[2])->val; |
| 934 | int shr = op->args[3]; |
| 935 | |
| 936 | if (op->opc == INDEX_op_extract2_i64) { |
| 937 | v1 >>= shr; |
| 938 | v2 <<= 64 - shr; |
| 939 | } else { |
| 940 | v1 = (uint32_t)v1 >> shr; |
| 941 | v2 = (int32_t)v2 << (32 - shr); |
| 942 | } |
| 943 | return tcg_opt_gen_movi(ctx, op, op->args[0], v1 | v2); |
| 944 | } |
| 945 | return false; |
| 946 | } |
| 947 | |
Richard Henderson | 2f9f08b | 2021-08-25 12:03:48 -0700 | [diff] [blame] | 948 | static bool fold_exts(OptContext *ctx, TCGOp *op) |
| 949 | { |
| 950 | return fold_const1(ctx, op); |
| 951 | } |
| 952 | |
| 953 | static bool fold_extu(OptContext *ctx, TCGOp *op) |
| 954 | { |
| 955 | return fold_const1(ctx, op); |
| 956 | } |
| 957 | |
Richard Henderson | 3eefdf2 | 2021-08-25 11:06:43 -0700 | [diff] [blame] | 958 | static bool fold_mb(OptContext *ctx, TCGOp *op) |
| 959 | { |
| 960 | /* Eliminate duplicate and redundant fence instructions. */ |
| 961 | if (ctx->prev_mb) { |
| 962 | /* |
| 963 | * Merge two barriers of the same type into one, |
| 964 | * or a weaker barrier into a stronger one, |
| 965 | * or two weaker barriers into a stronger one. |
| 966 | * mb X; mb Y => mb X|Y |
| 967 | * mb; strl => mb; st |
| 968 | * ldaq; mb => ld; mb |
| 969 | * ldaq; strl => ld; mb; st |
| 970 | * Other combinations are also merged into a strong |
| 971 | * barrier. This is stricter than specified but for |
| 972 | * the purposes of TCG is better than not optimizing. |
| 973 | */ |
| 974 | ctx->prev_mb->args[0] |= op->args[0]; |
| 975 | tcg_op_remove(ctx->tcg, op); |
| 976 | } else { |
| 977 | ctx->prev_mb = op; |
| 978 | } |
| 979 | return true; |
| 980 | } |
| 981 | |
Richard Henderson | 0c310a3 | 2021-08-24 10:37:24 -0700 | [diff] [blame] | 982 | static bool fold_movcond(OptContext *ctx, TCGOp *op) |
| 983 | { |
| 984 | TCGOpcode opc = op->opc; |
| 985 | TCGCond cond = op->args[5]; |
| 986 | int i = do_constant_folding_cond(opc, op->args[1], op->args[2], cond); |
| 987 | |
| 988 | if (i >= 0) { |
| 989 | return tcg_opt_gen_mov(ctx, op, op->args[0], op->args[4 - i]); |
| 990 | } |
| 991 | |
| 992 | if (arg_is_const(op->args[3]) && arg_is_const(op->args[4])) { |
| 993 | uint64_t tv = arg_info(op->args[3])->val; |
| 994 | uint64_t fv = arg_info(op->args[4])->val; |
| 995 | |
| 996 | opc = (opc == INDEX_op_movcond_i32 |
| 997 | ? INDEX_op_setcond_i32 : INDEX_op_setcond_i64); |
| 998 | |
| 999 | if (tv == 1 && fv == 0) { |
| 1000 | op->opc = opc; |
| 1001 | op->args[3] = cond; |
| 1002 | } else if (fv == 1 && tv == 0) { |
| 1003 | op->opc = opc; |
| 1004 | op->args[3] = tcg_invert_cond(cond); |
| 1005 | } |
| 1006 | } |
| 1007 | return false; |
| 1008 | } |
| 1009 | |
Richard Henderson | 2f9f08b | 2021-08-25 12:03:48 -0700 | [diff] [blame] | 1010 | static bool fold_mul(OptContext *ctx, TCGOp *op) |
| 1011 | { |
| 1012 | return fold_const2(ctx, op); |
| 1013 | } |
| 1014 | |
| 1015 | static bool fold_mul_highpart(OptContext *ctx, TCGOp *op) |
| 1016 | { |
| 1017 | return fold_const2(ctx, op); |
| 1018 | } |
| 1019 | |
Richard Henderson | 6b8ac0d | 2021-08-24 10:24:12 -0700 | [diff] [blame] | 1020 | static bool fold_mulu2_i32(OptContext *ctx, TCGOp *op) |
| 1021 | { |
| 1022 | if (arg_is_const(op->args[2]) && arg_is_const(op->args[3])) { |
| 1023 | uint32_t a = arg_info(op->args[2])->val; |
| 1024 | uint32_t b = arg_info(op->args[3])->val; |
| 1025 | uint64_t r = (uint64_t)a * b; |
| 1026 | TCGArg rl, rh; |
| 1027 | TCGOp *op2 = tcg_op_insert_before(ctx->tcg, op, INDEX_op_mov_i32); |
| 1028 | |
| 1029 | rl = op->args[0]; |
| 1030 | rh = op->args[1]; |
| 1031 | tcg_opt_gen_movi(ctx, op, rl, (int32_t)r); |
| 1032 | tcg_opt_gen_movi(ctx, op2, rh, (int32_t)(r >> 32)); |
| 1033 | return true; |
| 1034 | } |
| 1035 | return false; |
| 1036 | } |
| 1037 | |
Richard Henderson | 2f9f08b | 2021-08-25 12:03:48 -0700 | [diff] [blame] | 1038 | static bool fold_nand(OptContext *ctx, TCGOp *op) |
| 1039 | { |
| 1040 | return fold_const2(ctx, op); |
| 1041 | } |
| 1042 | |
| 1043 | static bool fold_neg(OptContext *ctx, TCGOp *op) |
| 1044 | { |
| 1045 | return fold_const1(ctx, op); |
| 1046 | } |
| 1047 | |
| 1048 | static bool fold_nor(OptContext *ctx, TCGOp *op) |
| 1049 | { |
| 1050 | return fold_const2(ctx, op); |
| 1051 | } |
| 1052 | |
| 1053 | static bool fold_not(OptContext *ctx, TCGOp *op) |
| 1054 | { |
| 1055 | return fold_const1(ctx, op); |
| 1056 | } |
| 1057 | |
| 1058 | static bool fold_or(OptContext *ctx, TCGOp *op) |
| 1059 | { |
| 1060 | return fold_const2(ctx, op); |
| 1061 | } |
| 1062 | |
| 1063 | static bool fold_orc(OptContext *ctx, TCGOp *op) |
| 1064 | { |
| 1065 | return fold_const2(ctx, op); |
| 1066 | } |
| 1067 | |
Richard Henderson | 3eefdf2 | 2021-08-25 11:06:43 -0700 | [diff] [blame] | 1068 | static bool fold_qemu_ld(OptContext *ctx, TCGOp *op) |
| 1069 | { |
| 1070 | /* Opcodes that touch guest memory stop the mb optimization. */ |
| 1071 | ctx->prev_mb = NULL; |
| 1072 | return false; |
| 1073 | } |
| 1074 | |
| 1075 | static bool fold_qemu_st(OptContext *ctx, TCGOp *op) |
| 1076 | { |
| 1077 | /* Opcodes that touch guest memory stop the mb optimization. */ |
| 1078 | ctx->prev_mb = NULL; |
| 1079 | return false; |
| 1080 | } |
| 1081 | |
Richard Henderson | 2f9f08b | 2021-08-25 12:03:48 -0700 | [diff] [blame] | 1082 | static bool fold_remainder(OptContext *ctx, TCGOp *op) |
| 1083 | { |
| 1084 | return fold_const2(ctx, op); |
| 1085 | } |
| 1086 | |
Richard Henderson | c63ff55 | 2021-08-24 09:35:30 -0700 | [diff] [blame] | 1087 | static bool fold_setcond(OptContext *ctx, TCGOp *op) |
| 1088 | { |
| 1089 | TCGCond cond = op->args[3]; |
| 1090 | int i = do_constant_folding_cond(op->opc, op->args[1], op->args[2], cond); |
| 1091 | |
| 1092 | if (i >= 0) { |
| 1093 | return tcg_opt_gen_movi(ctx, op, op->args[0], i); |
| 1094 | } |
| 1095 | return false; |
| 1096 | } |
| 1097 | |
Richard Henderson | bc47b1a | 2021-08-24 09:09:35 -0700 | [diff] [blame] | 1098 | static bool fold_setcond2(OptContext *ctx, TCGOp *op) |
| 1099 | { |
| 1100 | TCGCond cond = op->args[5]; |
| 1101 | int i = do_constant_folding_cond2(&op->args[1], &op->args[3], cond); |
| 1102 | int inv = 0; |
| 1103 | |
| 1104 | if (i >= 0) { |
| 1105 | goto do_setcond_const; |
| 1106 | } |
| 1107 | |
| 1108 | switch (cond) { |
| 1109 | case TCG_COND_LT: |
| 1110 | case TCG_COND_GE: |
| 1111 | /* |
| 1112 | * Simplify LT/GE comparisons vs zero to a single compare |
| 1113 | * vs the high word of the input. |
| 1114 | */ |
| 1115 | if (arg_is_const(op->args[3]) && arg_info(op->args[3])->val == 0 && |
| 1116 | arg_is_const(op->args[4]) && arg_info(op->args[4])->val == 0) { |
| 1117 | goto do_setcond_high; |
| 1118 | } |
| 1119 | break; |
| 1120 | |
| 1121 | case TCG_COND_NE: |
| 1122 | inv = 1; |
| 1123 | QEMU_FALLTHROUGH; |
| 1124 | case TCG_COND_EQ: |
| 1125 | /* |
| 1126 | * Simplify EQ/NE comparisons where one of the pairs |
| 1127 | * can be simplified. |
| 1128 | */ |
| 1129 | i = do_constant_folding_cond(INDEX_op_setcond_i32, op->args[1], |
| 1130 | op->args[3], cond); |
| 1131 | switch (i ^ inv) { |
| 1132 | case 0: |
| 1133 | goto do_setcond_const; |
| 1134 | case 1: |
| 1135 | goto do_setcond_high; |
| 1136 | } |
| 1137 | |
| 1138 | i = do_constant_folding_cond(INDEX_op_setcond_i32, op->args[2], |
| 1139 | op->args[4], cond); |
| 1140 | switch (i ^ inv) { |
| 1141 | case 0: |
| 1142 | goto do_setcond_const; |
| 1143 | case 1: |
| 1144 | op->args[2] = op->args[3]; |
| 1145 | op->args[3] = cond; |
| 1146 | op->opc = INDEX_op_setcond_i32; |
| 1147 | break; |
| 1148 | } |
| 1149 | break; |
| 1150 | |
| 1151 | default: |
| 1152 | break; |
| 1153 | |
| 1154 | do_setcond_high: |
| 1155 | op->args[1] = op->args[2]; |
| 1156 | op->args[2] = op->args[4]; |
| 1157 | op->args[3] = cond; |
| 1158 | op->opc = INDEX_op_setcond_i32; |
| 1159 | break; |
| 1160 | } |
| 1161 | return false; |
| 1162 | |
| 1163 | do_setcond_const: |
| 1164 | return tcg_opt_gen_movi(ctx, op, op->args[0], i); |
| 1165 | } |
| 1166 | |
Richard Henderson | b6617c8 | 2021-08-24 10:44:53 -0700 | [diff] [blame] | 1167 | static bool fold_sextract(OptContext *ctx, TCGOp *op) |
| 1168 | { |
| 1169 | if (arg_is_const(op->args[1])) { |
| 1170 | uint64_t t; |
| 1171 | |
| 1172 | t = arg_info(op->args[1])->val; |
| 1173 | t = sextract64(t, op->args[2], op->args[3]); |
| 1174 | return tcg_opt_gen_movi(ctx, op, op->args[0], t); |
| 1175 | } |
| 1176 | return false; |
| 1177 | } |
| 1178 | |
Richard Henderson | 2f9f08b | 2021-08-25 12:03:48 -0700 | [diff] [blame] | 1179 | static bool fold_shift(OptContext *ctx, TCGOp *op) |
| 1180 | { |
| 1181 | return fold_const2(ctx, op); |
| 1182 | } |
| 1183 | |
| 1184 | static bool fold_sub(OptContext *ctx, TCGOp *op) |
| 1185 | { |
| 1186 | return fold_const2(ctx, op); |
| 1187 | } |
| 1188 | |
Richard Henderson | e3f7dc2 | 2021-08-24 10:30:38 -0700 | [diff] [blame] | 1189 | static bool fold_sub2_i32(OptContext *ctx, TCGOp *op) |
| 1190 | { |
| 1191 | return fold_addsub2_i32(ctx, op, false); |
| 1192 | } |
| 1193 | |
Richard Henderson | 2f9f08b | 2021-08-25 12:03:48 -0700 | [diff] [blame] | 1194 | static bool fold_xor(OptContext *ctx, TCGOp *op) |
| 1195 | { |
| 1196 | return fold_const2(ctx, op); |
| 1197 | } |
| 1198 | |
Kirill Batuzov | 22613af | 2011-07-07 16:37:13 +0400 | [diff] [blame] | 1199 | /* Propagate constants and copies, fold constant expressions. */ |
Aurelien Jarno | 36e60ef | 2015-06-04 21:53:27 +0200 | [diff] [blame] | 1200 | void tcg_optimize(TCGContext *s) |
Kirill Batuzov | 8f2e8c0 | 2011-07-07 16:37:12 +0400 | [diff] [blame] | 1201 | { |
Richard Henderson | 5cf32be | 2021-08-24 08:17:08 -0700 | [diff] [blame] | 1202 | int nb_temps, i; |
Richard Henderson | d0ed515 | 2021-08-24 07:38:39 -0700 | [diff] [blame] | 1203 | TCGOp *op, *op_next; |
Richard Henderson | dc84988 | 2021-08-24 07:13:45 -0700 | [diff] [blame] | 1204 | OptContext ctx = { .tcg = s }; |
Richard Henderson | 5d8f536 | 2012-09-21 10:13:38 -0700 | [diff] [blame] | 1205 | |
Kirill Batuzov | 22613af | 2011-07-07 16:37:13 +0400 | [diff] [blame] | 1206 | /* Array VALS has an element for each temp. |
| 1207 | If this temp holds a constant then its value is kept in VALS' element. |
Aurelien Jarno | e590d4e | 2012-09-11 12:31:21 +0200 | [diff] [blame] | 1208 | If this temp is a copy of other ones then the other copies are |
| 1209 | available through the doubly linked circular list. */ |
Kirill Batuzov | 8f2e8c0 | 2011-07-07 16:37:12 +0400 | [diff] [blame] | 1210 | |
| 1211 | nb_temps = s->nb_temps; |
Richard Henderson | 8f17a97 | 2020-03-30 19:52:02 -0700 | [diff] [blame] | 1212 | for (i = 0; i < nb_temps; ++i) { |
| 1213 | s->temps[i].state_ptr = NULL; |
| 1214 | } |
Kirill Batuzov | 8f2e8c0 | 2011-07-07 16:37:12 +0400 | [diff] [blame] | 1215 | |
Richard Henderson | 15fa08f | 2017-11-02 15:19:14 +0100 | [diff] [blame] | 1216 | QTAILQ_FOREACH_SAFE(op, &s->ops, link, op_next) { |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 1217 | uint64_t z_mask, partmask, affected, tmp; |
Richard Henderson | c45cb8b | 2014-09-19 13:49:15 -0700 | [diff] [blame] | 1218 | TCGOpcode opc = op->opc; |
Richard Henderson | 5cf32be | 2021-08-24 08:17:08 -0700 | [diff] [blame] | 1219 | const TCGOpDef *def; |
Richard Henderson | 404a148 | 2021-08-24 11:08:21 -0700 | [diff] [blame] | 1220 | bool done = false; |
Richard Henderson | c45cb8b | 2014-09-19 13:49:15 -0700 | [diff] [blame] | 1221 | |
Richard Henderson | 5cf32be | 2021-08-24 08:17:08 -0700 | [diff] [blame] | 1222 | /* Calls are special. */ |
Richard Henderson | c45cb8b | 2014-09-19 13:49:15 -0700 | [diff] [blame] | 1223 | if (opc == INDEX_op_call) { |
Richard Henderson | 5cf32be | 2021-08-24 08:17:08 -0700 | [diff] [blame] | 1224 | fold_call(&ctx, op); |
| 1225 | continue; |
Richard Henderson | cf06667 | 2014-03-22 20:06:52 -0700 | [diff] [blame] | 1226 | } |
Richard Henderson | 5cf32be | 2021-08-24 08:17:08 -0700 | [diff] [blame] | 1227 | |
| 1228 | def = &tcg_op_defs[opc]; |
Richard Henderson | ec5d4cb | 2021-08-24 08:20:27 -0700 | [diff] [blame] | 1229 | init_arguments(&ctx, op, def->nb_oargs + def->nb_iargs); |
| 1230 | copy_propagate(&ctx, op, def->nb_oargs, def->nb_iargs); |
Kirill Batuzov | 22613af | 2011-07-07 16:37:13 +0400 | [diff] [blame] | 1231 | |
Kirill Batuzov | 53108fb | 2011-07-07 16:37:14 +0400 | [diff] [blame] | 1232 | /* For commutative operations make constant second argument */ |
Richard Henderson | c45cb8b | 2014-09-19 13:49:15 -0700 | [diff] [blame] | 1233 | switch (opc) { |
Richard Henderson | 170ba88 | 2017-11-22 09:07:11 +0100 | [diff] [blame] | 1234 | CASE_OP_32_64_VEC(add): |
| 1235 | CASE_OP_32_64_VEC(mul): |
| 1236 | CASE_OP_32_64_VEC(and): |
| 1237 | CASE_OP_32_64_VEC(or): |
| 1238 | CASE_OP_32_64_VEC(xor): |
Richard Henderson | cb25c80 | 2011-08-17 14:11:47 -0700 | [diff] [blame] | 1239 | CASE_OP_32_64(eqv): |
| 1240 | CASE_OP_32_64(nand): |
| 1241 | CASE_OP_32_64(nor): |
Richard Henderson | 0327152 | 2013-08-14 14:35:56 -0700 | [diff] [blame] | 1242 | CASE_OP_32_64(muluh): |
| 1243 | CASE_OP_32_64(mulsh): |
Richard Henderson | acd9370 | 2016-12-08 12:28:42 -0800 | [diff] [blame] | 1244 | swap_commutative(op->args[0], &op->args[1], &op->args[2]); |
Kirill Batuzov | 53108fb | 2011-07-07 16:37:14 +0400 | [diff] [blame] | 1245 | break; |
Aurelien Jarno | 65a7cce | 2012-09-06 16:47:14 +0200 | [diff] [blame] | 1246 | CASE_OP_32_64(brcond): |
Richard Henderson | acd9370 | 2016-12-08 12:28:42 -0800 | [diff] [blame] | 1247 | if (swap_commutative(-1, &op->args[0], &op->args[1])) { |
| 1248 | op->args[2] = tcg_swap_cond(op->args[2]); |
Aurelien Jarno | 65a7cce | 2012-09-06 16:47:14 +0200 | [diff] [blame] | 1249 | } |
| 1250 | break; |
| 1251 | CASE_OP_32_64(setcond): |
Richard Henderson | acd9370 | 2016-12-08 12:28:42 -0800 | [diff] [blame] | 1252 | if (swap_commutative(op->args[0], &op->args[1], &op->args[2])) { |
| 1253 | op->args[3] = tcg_swap_cond(op->args[3]); |
Aurelien Jarno | 65a7cce | 2012-09-06 16:47:14 +0200 | [diff] [blame] | 1254 | } |
| 1255 | break; |
Richard Henderson | fa01a20 | 2012-09-21 10:13:37 -0700 | [diff] [blame] | 1256 | CASE_OP_32_64(movcond): |
Richard Henderson | acd9370 | 2016-12-08 12:28:42 -0800 | [diff] [blame] | 1257 | if (swap_commutative(-1, &op->args[1], &op->args[2])) { |
| 1258 | op->args[5] = tcg_swap_cond(op->args[5]); |
Richard Henderson | fa01a20 | 2012-09-21 10:13:37 -0700 | [diff] [blame] | 1259 | } |
Richard Henderson | 5d8f536 | 2012-09-21 10:13:38 -0700 | [diff] [blame] | 1260 | /* For movcond, we canonicalize the "false" input reg to match |
| 1261 | the destination reg so that the tcg backend can implement |
| 1262 | a "move if true" operation. */ |
Richard Henderson | acd9370 | 2016-12-08 12:28:42 -0800 | [diff] [blame] | 1263 | if (swap_commutative(op->args[0], &op->args[4], &op->args[3])) { |
| 1264 | op->args[5] = tcg_invert_cond(op->args[5]); |
Richard Henderson | 5d8f536 | 2012-09-21 10:13:38 -0700 | [diff] [blame] | 1265 | } |
Richard Henderson | 1e484e6 | 2012-10-02 11:32:22 -0700 | [diff] [blame] | 1266 | break; |
Richard Henderson | d7156f7 | 2013-02-19 23:51:52 -0800 | [diff] [blame] | 1267 | CASE_OP_32_64(add2): |
Richard Henderson | acd9370 | 2016-12-08 12:28:42 -0800 | [diff] [blame] | 1268 | swap_commutative(op->args[0], &op->args[2], &op->args[4]); |
| 1269 | swap_commutative(op->args[1], &op->args[3], &op->args[5]); |
Richard Henderson | 1e484e6 | 2012-10-02 11:32:22 -0700 | [diff] [blame] | 1270 | break; |
Richard Henderson | d7156f7 | 2013-02-19 23:51:52 -0800 | [diff] [blame] | 1271 | CASE_OP_32_64(mulu2): |
Richard Henderson | 4d3203f | 2013-02-19 23:51:53 -0800 | [diff] [blame] | 1272 | CASE_OP_32_64(muls2): |
Richard Henderson | acd9370 | 2016-12-08 12:28:42 -0800 | [diff] [blame] | 1273 | swap_commutative(op->args[0], &op->args[2], &op->args[3]); |
Richard Henderson | 1414968 | 2012-10-02 11:32:30 -0700 | [diff] [blame] | 1274 | break; |
Richard Henderson | 0bfcb86 | 2012-10-02 11:32:23 -0700 | [diff] [blame] | 1275 | case INDEX_op_brcond2_i32: |
Richard Henderson | acd9370 | 2016-12-08 12:28:42 -0800 | [diff] [blame] | 1276 | if (swap_commutative2(&op->args[0], &op->args[2])) { |
| 1277 | op->args[4] = tcg_swap_cond(op->args[4]); |
Richard Henderson | 0bfcb86 | 2012-10-02 11:32:23 -0700 | [diff] [blame] | 1278 | } |
| 1279 | break; |
| 1280 | case INDEX_op_setcond2_i32: |
Richard Henderson | acd9370 | 2016-12-08 12:28:42 -0800 | [diff] [blame] | 1281 | if (swap_commutative2(&op->args[1], &op->args[3])) { |
| 1282 | op->args[5] = tcg_swap_cond(op->args[5]); |
Richard Henderson | 0bfcb86 | 2012-10-02 11:32:23 -0700 | [diff] [blame] | 1283 | } |
| 1284 | break; |
Kirill Batuzov | 53108fb | 2011-07-07 16:37:14 +0400 | [diff] [blame] | 1285 | default: |
| 1286 | break; |
| 1287 | } |
| 1288 | |
Richard Henderson | 2d49754 | 2013-03-21 09:13:33 -0700 | [diff] [blame] | 1289 | /* Simplify expressions for "shift/rot r, 0, a => movi r, 0", |
| 1290 | and "sub r, 0, a => neg r, a" case. */ |
Richard Henderson | c45cb8b | 2014-09-19 13:49:15 -0700 | [diff] [blame] | 1291 | switch (opc) { |
Aurelien Jarno | 01ee528 | 2012-09-06 16:47:14 +0200 | [diff] [blame] | 1292 | CASE_OP_32_64(shl): |
| 1293 | CASE_OP_32_64(shr): |
| 1294 | CASE_OP_32_64(sar): |
| 1295 | CASE_OP_32_64(rotl): |
| 1296 | CASE_OP_32_64(rotr): |
Richard Henderson | 6349039 | 2017-06-20 13:43:15 -0700 | [diff] [blame] | 1297 | if (arg_is_const(op->args[1]) |
| 1298 | && arg_info(op->args[1])->val == 0) { |
Richard Henderson | dc84988 | 2021-08-24 07:13:45 -0700 | [diff] [blame] | 1299 | tcg_opt_gen_movi(&ctx, op, op->args[0], 0); |
Aurelien Jarno | 01ee528 | 2012-09-06 16:47:14 +0200 | [diff] [blame] | 1300 | continue; |
| 1301 | } |
| 1302 | break; |
Richard Henderson | 170ba88 | 2017-11-22 09:07:11 +0100 | [diff] [blame] | 1303 | CASE_OP_32_64_VEC(sub): |
Richard Henderson | 2d49754 | 2013-03-21 09:13:33 -0700 | [diff] [blame] | 1304 | { |
| 1305 | TCGOpcode neg_op; |
| 1306 | bool have_neg; |
| 1307 | |
Richard Henderson | 6349039 | 2017-06-20 13:43:15 -0700 | [diff] [blame] | 1308 | if (arg_is_const(op->args[2])) { |
Richard Henderson | 2d49754 | 2013-03-21 09:13:33 -0700 | [diff] [blame] | 1309 | /* Proceed with possible constant folding. */ |
| 1310 | break; |
| 1311 | } |
Richard Henderson | c45cb8b | 2014-09-19 13:49:15 -0700 | [diff] [blame] | 1312 | if (opc == INDEX_op_sub_i32) { |
Richard Henderson | 2d49754 | 2013-03-21 09:13:33 -0700 | [diff] [blame] | 1313 | neg_op = INDEX_op_neg_i32; |
| 1314 | have_neg = TCG_TARGET_HAS_neg_i32; |
Richard Henderson | 170ba88 | 2017-11-22 09:07:11 +0100 | [diff] [blame] | 1315 | } else if (opc == INDEX_op_sub_i64) { |
Richard Henderson | 2d49754 | 2013-03-21 09:13:33 -0700 | [diff] [blame] | 1316 | neg_op = INDEX_op_neg_i64; |
| 1317 | have_neg = TCG_TARGET_HAS_neg_i64; |
Richard Henderson | ac383dde | 2019-04-20 00:27:24 +0000 | [diff] [blame] | 1318 | } else if (TCG_TARGET_HAS_neg_vec) { |
| 1319 | TCGType type = TCGOP_VECL(op) + TCG_TYPE_V64; |
| 1320 | unsigned vece = TCGOP_VECE(op); |
Richard Henderson | 170ba88 | 2017-11-22 09:07:11 +0100 | [diff] [blame] | 1321 | neg_op = INDEX_op_neg_vec; |
Richard Henderson | ac383dde | 2019-04-20 00:27:24 +0000 | [diff] [blame] | 1322 | have_neg = tcg_can_emit_vec_op(neg_op, type, vece) > 0; |
| 1323 | } else { |
| 1324 | break; |
Richard Henderson | 2d49754 | 2013-03-21 09:13:33 -0700 | [diff] [blame] | 1325 | } |
| 1326 | if (!have_neg) { |
| 1327 | break; |
| 1328 | } |
Richard Henderson | 6349039 | 2017-06-20 13:43:15 -0700 | [diff] [blame] | 1329 | if (arg_is_const(op->args[1]) |
| 1330 | && arg_info(op->args[1])->val == 0) { |
Richard Henderson | c45cb8b | 2014-09-19 13:49:15 -0700 | [diff] [blame] | 1331 | op->opc = neg_op; |
Richard Henderson | acd9370 | 2016-12-08 12:28:42 -0800 | [diff] [blame] | 1332 | reset_temp(op->args[0]); |
| 1333 | op->args[1] = op->args[2]; |
Richard Henderson | 2d49754 | 2013-03-21 09:13:33 -0700 | [diff] [blame] | 1334 | continue; |
| 1335 | } |
| 1336 | } |
| 1337 | break; |
Richard Henderson | 170ba88 | 2017-11-22 09:07:11 +0100 | [diff] [blame] | 1338 | CASE_OP_32_64_VEC(xor): |
Richard Henderson | e201b56 | 2014-01-28 13:15:38 -0800 | [diff] [blame] | 1339 | CASE_OP_32_64(nand): |
Richard Henderson | 6349039 | 2017-06-20 13:43:15 -0700 | [diff] [blame] | 1340 | if (!arg_is_const(op->args[1]) |
| 1341 | && arg_is_const(op->args[2]) |
| 1342 | && arg_info(op->args[2])->val == -1) { |
Richard Henderson | e201b56 | 2014-01-28 13:15:38 -0800 | [diff] [blame] | 1343 | i = 1; |
| 1344 | goto try_not; |
| 1345 | } |
| 1346 | break; |
| 1347 | CASE_OP_32_64(nor): |
Richard Henderson | 6349039 | 2017-06-20 13:43:15 -0700 | [diff] [blame] | 1348 | if (!arg_is_const(op->args[1]) |
| 1349 | && arg_is_const(op->args[2]) |
| 1350 | && arg_info(op->args[2])->val == 0) { |
Richard Henderson | e201b56 | 2014-01-28 13:15:38 -0800 | [diff] [blame] | 1351 | i = 1; |
| 1352 | goto try_not; |
| 1353 | } |
| 1354 | break; |
Richard Henderson | 170ba88 | 2017-11-22 09:07:11 +0100 | [diff] [blame] | 1355 | CASE_OP_32_64_VEC(andc): |
Richard Henderson | 6349039 | 2017-06-20 13:43:15 -0700 | [diff] [blame] | 1356 | if (!arg_is_const(op->args[2]) |
| 1357 | && arg_is_const(op->args[1]) |
| 1358 | && arg_info(op->args[1])->val == -1) { |
Richard Henderson | e201b56 | 2014-01-28 13:15:38 -0800 | [diff] [blame] | 1359 | i = 2; |
| 1360 | goto try_not; |
| 1361 | } |
| 1362 | break; |
Richard Henderson | 170ba88 | 2017-11-22 09:07:11 +0100 | [diff] [blame] | 1363 | CASE_OP_32_64_VEC(orc): |
Richard Henderson | e201b56 | 2014-01-28 13:15:38 -0800 | [diff] [blame] | 1364 | CASE_OP_32_64(eqv): |
Richard Henderson | 6349039 | 2017-06-20 13:43:15 -0700 | [diff] [blame] | 1365 | if (!arg_is_const(op->args[2]) |
| 1366 | && arg_is_const(op->args[1]) |
| 1367 | && arg_info(op->args[1])->val == 0) { |
Richard Henderson | e201b56 | 2014-01-28 13:15:38 -0800 | [diff] [blame] | 1368 | i = 2; |
| 1369 | goto try_not; |
| 1370 | } |
| 1371 | break; |
| 1372 | try_not: |
| 1373 | { |
| 1374 | TCGOpcode not_op; |
| 1375 | bool have_not; |
| 1376 | |
Richard Henderson | 170ba88 | 2017-11-22 09:07:11 +0100 | [diff] [blame] | 1377 | if (def->flags & TCG_OPF_VECTOR) { |
| 1378 | not_op = INDEX_op_not_vec; |
| 1379 | have_not = TCG_TARGET_HAS_not_vec; |
| 1380 | } else if (def->flags & TCG_OPF_64BIT) { |
Richard Henderson | e201b56 | 2014-01-28 13:15:38 -0800 | [diff] [blame] | 1381 | not_op = INDEX_op_not_i64; |
| 1382 | have_not = TCG_TARGET_HAS_not_i64; |
| 1383 | } else { |
| 1384 | not_op = INDEX_op_not_i32; |
| 1385 | have_not = TCG_TARGET_HAS_not_i32; |
| 1386 | } |
| 1387 | if (!have_not) { |
| 1388 | break; |
| 1389 | } |
Richard Henderson | c45cb8b | 2014-09-19 13:49:15 -0700 | [diff] [blame] | 1390 | op->opc = not_op; |
Richard Henderson | acd9370 | 2016-12-08 12:28:42 -0800 | [diff] [blame] | 1391 | reset_temp(op->args[0]); |
| 1392 | op->args[1] = op->args[i]; |
Richard Henderson | e201b56 | 2014-01-28 13:15:38 -0800 | [diff] [blame] | 1393 | continue; |
| 1394 | } |
Aurelien Jarno | 01ee528 | 2012-09-06 16:47:14 +0200 | [diff] [blame] | 1395 | default: |
| 1396 | break; |
| 1397 | } |
| 1398 | |
Richard Henderson | 464a144 | 2014-01-31 07:42:11 -0600 | [diff] [blame] | 1399 | /* Simplify expression for "op r, a, const => mov r, a" cases */ |
Richard Henderson | c45cb8b | 2014-09-19 13:49:15 -0700 | [diff] [blame] | 1400 | switch (opc) { |
Richard Henderson | 170ba88 | 2017-11-22 09:07:11 +0100 | [diff] [blame] | 1401 | CASE_OP_32_64_VEC(add): |
| 1402 | CASE_OP_32_64_VEC(sub): |
| 1403 | CASE_OP_32_64_VEC(or): |
| 1404 | CASE_OP_32_64_VEC(xor): |
| 1405 | CASE_OP_32_64_VEC(andc): |
Kirill Batuzov | 55c0975 | 2011-07-07 16:37:16 +0400 | [diff] [blame] | 1406 | CASE_OP_32_64(shl): |
| 1407 | CASE_OP_32_64(shr): |
| 1408 | CASE_OP_32_64(sar): |
Richard Henderson | 25c4d9c | 2011-08-17 14:11:46 -0700 | [diff] [blame] | 1409 | CASE_OP_32_64(rotl): |
| 1410 | CASE_OP_32_64(rotr): |
Richard Henderson | 6349039 | 2017-06-20 13:43:15 -0700 | [diff] [blame] | 1411 | if (!arg_is_const(op->args[1]) |
| 1412 | && arg_is_const(op->args[2]) |
| 1413 | && arg_info(op->args[2])->val == 0) { |
Richard Henderson | dc84988 | 2021-08-24 07:13:45 -0700 | [diff] [blame] | 1414 | tcg_opt_gen_mov(&ctx, op, op->args[0], op->args[1]); |
Aurelien Jarno | 97a79eb | 2015-06-05 11:19:18 +0200 | [diff] [blame] | 1415 | continue; |
Kirill Batuzov | 53108fb | 2011-07-07 16:37:14 +0400 | [diff] [blame] | 1416 | } |
| 1417 | break; |
Richard Henderson | 170ba88 | 2017-11-22 09:07:11 +0100 | [diff] [blame] | 1418 | CASE_OP_32_64_VEC(and): |
| 1419 | CASE_OP_32_64_VEC(orc): |
Richard Henderson | 464a144 | 2014-01-31 07:42:11 -0600 | [diff] [blame] | 1420 | CASE_OP_32_64(eqv): |
Richard Henderson | 6349039 | 2017-06-20 13:43:15 -0700 | [diff] [blame] | 1421 | if (!arg_is_const(op->args[1]) |
| 1422 | && arg_is_const(op->args[2]) |
| 1423 | && arg_info(op->args[2])->val == -1) { |
Richard Henderson | dc84988 | 2021-08-24 07:13:45 -0700 | [diff] [blame] | 1424 | tcg_opt_gen_mov(&ctx, op, op->args[0], op->args[1]); |
Aurelien Jarno | 97a79eb | 2015-06-05 11:19:18 +0200 | [diff] [blame] | 1425 | continue; |
Richard Henderson | 464a144 | 2014-01-31 07:42:11 -0600 | [diff] [blame] | 1426 | } |
| 1427 | break; |
Aurelien Jarno | 56e4943 | 2012-09-06 16:47:13 +0200 | [diff] [blame] | 1428 | default: |
| 1429 | break; |
| 1430 | } |
| 1431 | |
Aurelien Jarno | 3031244 | 2013-09-03 08:27:38 +0200 | [diff] [blame] | 1432 | /* Simplify using known-zero bits. Currently only ops with a single |
| 1433 | output argument is supported. */ |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 1434 | z_mask = -1; |
Paolo Bonzini | 633f650 | 2013-01-11 15:42:53 -0800 | [diff] [blame] | 1435 | affected = -1; |
Richard Henderson | c45cb8b | 2014-09-19 13:49:15 -0700 | [diff] [blame] | 1436 | switch (opc) { |
Paolo Bonzini | 3a9d8b1 | 2013-01-11 15:42:52 -0800 | [diff] [blame] | 1437 | CASE_OP_32_64(ext8s): |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 1438 | if ((arg_info(op->args[1])->z_mask & 0x80) != 0) { |
Paolo Bonzini | 3a9d8b1 | 2013-01-11 15:42:52 -0800 | [diff] [blame] | 1439 | break; |
| 1440 | } |
Thomas Huth | d84568b | 2020-12-11 16:24:24 +0100 | [diff] [blame] | 1441 | QEMU_FALLTHROUGH; |
Paolo Bonzini | 3a9d8b1 | 2013-01-11 15:42:52 -0800 | [diff] [blame] | 1442 | CASE_OP_32_64(ext8u): |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 1443 | z_mask = 0xff; |
Paolo Bonzini | 3a9d8b1 | 2013-01-11 15:42:52 -0800 | [diff] [blame] | 1444 | goto and_const; |
| 1445 | CASE_OP_32_64(ext16s): |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 1446 | if ((arg_info(op->args[1])->z_mask & 0x8000) != 0) { |
Paolo Bonzini | 3a9d8b1 | 2013-01-11 15:42:52 -0800 | [diff] [blame] | 1447 | break; |
| 1448 | } |
Thomas Huth | d84568b | 2020-12-11 16:24:24 +0100 | [diff] [blame] | 1449 | QEMU_FALLTHROUGH; |
Paolo Bonzini | 3a9d8b1 | 2013-01-11 15:42:52 -0800 | [diff] [blame] | 1450 | CASE_OP_32_64(ext16u): |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 1451 | z_mask = 0xffff; |
Paolo Bonzini | 3a9d8b1 | 2013-01-11 15:42:52 -0800 | [diff] [blame] | 1452 | goto and_const; |
| 1453 | case INDEX_op_ext32s_i64: |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 1454 | if ((arg_info(op->args[1])->z_mask & 0x80000000) != 0) { |
Paolo Bonzini | 3a9d8b1 | 2013-01-11 15:42:52 -0800 | [diff] [blame] | 1455 | break; |
| 1456 | } |
Thomas Huth | d84568b | 2020-12-11 16:24:24 +0100 | [diff] [blame] | 1457 | QEMU_FALLTHROUGH; |
Paolo Bonzini | 3a9d8b1 | 2013-01-11 15:42:52 -0800 | [diff] [blame] | 1458 | case INDEX_op_ext32u_i64: |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 1459 | z_mask = 0xffffffffU; |
Paolo Bonzini | 3a9d8b1 | 2013-01-11 15:42:52 -0800 | [diff] [blame] | 1460 | goto and_const; |
| 1461 | |
| 1462 | CASE_OP_32_64(and): |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 1463 | z_mask = arg_info(op->args[2])->z_mask; |
Richard Henderson | 6349039 | 2017-06-20 13:43:15 -0700 | [diff] [blame] | 1464 | if (arg_is_const(op->args[2])) { |
Paolo Bonzini | 3a9d8b1 | 2013-01-11 15:42:52 -0800 | [diff] [blame] | 1465 | and_const: |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 1466 | affected = arg_info(op->args[1])->z_mask & ~z_mask; |
Paolo Bonzini | 3a9d8b1 | 2013-01-11 15:42:52 -0800 | [diff] [blame] | 1467 | } |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 1468 | z_mask = arg_info(op->args[1])->z_mask & z_mask; |
Paolo Bonzini | 3a9d8b1 | 2013-01-11 15:42:52 -0800 | [diff] [blame] | 1469 | break; |
| 1470 | |
Aurelien Jarno | 8bcb5c8 | 2015-07-27 12:41:45 +0200 | [diff] [blame] | 1471 | case INDEX_op_ext_i32_i64: |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 1472 | if ((arg_info(op->args[1])->z_mask & 0x80000000) != 0) { |
Aurelien Jarno | 8bcb5c8 | 2015-07-27 12:41:45 +0200 | [diff] [blame] | 1473 | break; |
| 1474 | } |
Thomas Huth | d84568b | 2020-12-11 16:24:24 +0100 | [diff] [blame] | 1475 | QEMU_FALLTHROUGH; |
Aurelien Jarno | 8bcb5c8 | 2015-07-27 12:41:45 +0200 | [diff] [blame] | 1476 | case INDEX_op_extu_i32_i64: |
| 1477 | /* We do not compute affected as it is a size changing op. */ |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 1478 | z_mask = (uint32_t)arg_info(op->args[1])->z_mask; |
Aurelien Jarno | 8bcb5c8 | 2015-07-27 12:41:45 +0200 | [diff] [blame] | 1479 | break; |
| 1480 | |
Richard Henderson | 23ec69ed | 2014-01-28 12:03:24 -0800 | [diff] [blame] | 1481 | CASE_OP_32_64(andc): |
| 1482 | /* Known-zeros does not imply known-ones. Therefore unless |
Richard Henderson | acd9370 | 2016-12-08 12:28:42 -0800 | [diff] [blame] | 1483 | op->args[2] is constant, we can't infer anything from it. */ |
Richard Henderson | 6349039 | 2017-06-20 13:43:15 -0700 | [diff] [blame] | 1484 | if (arg_is_const(op->args[2])) { |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 1485 | z_mask = ~arg_info(op->args[2])->z_mask; |
Richard Henderson | 23ec69ed | 2014-01-28 12:03:24 -0800 | [diff] [blame] | 1486 | goto and_const; |
| 1487 | } |
Richard Henderson | 6349039 | 2017-06-20 13:43:15 -0700 | [diff] [blame] | 1488 | /* But we certainly know nothing outside args[1] may be set. */ |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 1489 | z_mask = arg_info(op->args[1])->z_mask; |
Richard Henderson | 23ec69ed | 2014-01-28 12:03:24 -0800 | [diff] [blame] | 1490 | break; |
| 1491 | |
Aurelien Jarno | e46b225 | 2013-09-03 08:27:38 +0200 | [diff] [blame] | 1492 | case INDEX_op_sar_i32: |
Richard Henderson | 6349039 | 2017-06-20 13:43:15 -0700 | [diff] [blame] | 1493 | if (arg_is_const(op->args[2])) { |
| 1494 | tmp = arg_info(op->args[2])->val & 31; |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 1495 | z_mask = (int32_t)arg_info(op->args[1])->z_mask >> tmp; |
Aurelien Jarno | e46b225 | 2013-09-03 08:27:38 +0200 | [diff] [blame] | 1496 | } |
| 1497 | break; |
| 1498 | case INDEX_op_sar_i64: |
Richard Henderson | 6349039 | 2017-06-20 13:43:15 -0700 | [diff] [blame] | 1499 | if (arg_is_const(op->args[2])) { |
| 1500 | tmp = arg_info(op->args[2])->val & 63; |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 1501 | z_mask = (int64_t)arg_info(op->args[1])->z_mask >> tmp; |
Paolo Bonzini | 3a9d8b1 | 2013-01-11 15:42:52 -0800 | [diff] [blame] | 1502 | } |
| 1503 | break; |
| 1504 | |
Aurelien Jarno | e46b225 | 2013-09-03 08:27:38 +0200 | [diff] [blame] | 1505 | case INDEX_op_shr_i32: |
Richard Henderson | 6349039 | 2017-06-20 13:43:15 -0700 | [diff] [blame] | 1506 | if (arg_is_const(op->args[2])) { |
| 1507 | tmp = arg_info(op->args[2])->val & 31; |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 1508 | z_mask = (uint32_t)arg_info(op->args[1])->z_mask >> tmp; |
Aurelien Jarno | e46b225 | 2013-09-03 08:27:38 +0200 | [diff] [blame] | 1509 | } |
| 1510 | break; |
| 1511 | case INDEX_op_shr_i64: |
Richard Henderson | 6349039 | 2017-06-20 13:43:15 -0700 | [diff] [blame] | 1512 | if (arg_is_const(op->args[2])) { |
| 1513 | tmp = arg_info(op->args[2])->val & 63; |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 1514 | z_mask = (uint64_t)arg_info(op->args[1])->z_mask >> tmp; |
Paolo Bonzini | 3a9d8b1 | 2013-01-11 15:42:52 -0800 | [diff] [blame] | 1515 | } |
| 1516 | break; |
| 1517 | |
Richard Henderson | 609ad70 | 2015-07-24 07:16:00 -0700 | [diff] [blame] | 1518 | case INDEX_op_extrl_i64_i32: |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 1519 | z_mask = (uint32_t)arg_info(op->args[1])->z_mask; |
Richard Henderson | 609ad70 | 2015-07-24 07:16:00 -0700 | [diff] [blame] | 1520 | break; |
| 1521 | case INDEX_op_extrh_i64_i32: |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 1522 | z_mask = (uint64_t)arg_info(op->args[1])->z_mask >> 32; |
Richard Henderson | 4bb7a41 | 2013-09-09 17:03:24 -0700 | [diff] [blame] | 1523 | break; |
| 1524 | |
Paolo Bonzini | 3a9d8b1 | 2013-01-11 15:42:52 -0800 | [diff] [blame] | 1525 | CASE_OP_32_64(shl): |
Richard Henderson | 6349039 | 2017-06-20 13:43:15 -0700 | [diff] [blame] | 1526 | if (arg_is_const(op->args[2])) { |
| 1527 | tmp = arg_info(op->args[2])->val & (TCG_TARGET_REG_BITS - 1); |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 1528 | z_mask = arg_info(op->args[1])->z_mask << tmp; |
Paolo Bonzini | 3a9d8b1 | 2013-01-11 15:42:52 -0800 | [diff] [blame] | 1529 | } |
| 1530 | break; |
| 1531 | |
| 1532 | CASE_OP_32_64(neg): |
| 1533 | /* Set to 1 all bits to the left of the rightmost. */ |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 1534 | z_mask = -(arg_info(op->args[1])->z_mask |
| 1535 | & -arg_info(op->args[1])->z_mask); |
Paolo Bonzini | 3a9d8b1 | 2013-01-11 15:42:52 -0800 | [diff] [blame] | 1536 | break; |
| 1537 | |
| 1538 | CASE_OP_32_64(deposit): |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 1539 | z_mask = deposit64(arg_info(op->args[1])->z_mask, |
| 1540 | op->args[3], op->args[4], |
| 1541 | arg_info(op->args[2])->z_mask); |
Paolo Bonzini | 3a9d8b1 | 2013-01-11 15:42:52 -0800 | [diff] [blame] | 1542 | break; |
| 1543 | |
Richard Henderson | 7ec8bab | 2016-10-14 12:04:32 -0500 | [diff] [blame] | 1544 | CASE_OP_32_64(extract): |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 1545 | z_mask = extract64(arg_info(op->args[1])->z_mask, |
| 1546 | op->args[2], op->args[3]); |
Richard Henderson | acd9370 | 2016-12-08 12:28:42 -0800 | [diff] [blame] | 1547 | if (op->args[2] == 0) { |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 1548 | affected = arg_info(op->args[1])->z_mask & ~z_mask; |
Richard Henderson | 7ec8bab | 2016-10-14 12:04:32 -0500 | [diff] [blame] | 1549 | } |
| 1550 | break; |
| 1551 | CASE_OP_32_64(sextract): |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 1552 | z_mask = sextract64(arg_info(op->args[1])->z_mask, |
| 1553 | op->args[2], op->args[3]); |
| 1554 | if (op->args[2] == 0 && (tcg_target_long)z_mask >= 0) { |
| 1555 | affected = arg_info(op->args[1])->z_mask & ~z_mask; |
Richard Henderson | 7ec8bab | 2016-10-14 12:04:32 -0500 | [diff] [blame] | 1556 | } |
| 1557 | break; |
| 1558 | |
Paolo Bonzini | 3a9d8b1 | 2013-01-11 15:42:52 -0800 | [diff] [blame] | 1559 | CASE_OP_32_64(or): |
| 1560 | CASE_OP_32_64(xor): |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 1561 | z_mask = arg_info(op->args[1])->z_mask |
| 1562 | | arg_info(op->args[2])->z_mask; |
Paolo Bonzini | 3a9d8b1 | 2013-01-11 15:42:52 -0800 | [diff] [blame] | 1563 | break; |
| 1564 | |
Richard Henderson | 0e28d00 | 2016-11-16 09:23:28 +0100 | [diff] [blame] | 1565 | case INDEX_op_clz_i32: |
| 1566 | case INDEX_op_ctz_i32: |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 1567 | z_mask = arg_info(op->args[2])->z_mask | 31; |
Richard Henderson | 0e28d00 | 2016-11-16 09:23:28 +0100 | [diff] [blame] | 1568 | break; |
| 1569 | |
| 1570 | case INDEX_op_clz_i64: |
| 1571 | case INDEX_op_ctz_i64: |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 1572 | z_mask = arg_info(op->args[2])->z_mask | 63; |
Richard Henderson | 0e28d00 | 2016-11-16 09:23:28 +0100 | [diff] [blame] | 1573 | break; |
| 1574 | |
Richard Henderson | a768e4e | 2016-11-21 11:13:39 +0100 | [diff] [blame] | 1575 | case INDEX_op_ctpop_i32: |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 1576 | z_mask = 32 | 31; |
Richard Henderson | a768e4e | 2016-11-21 11:13:39 +0100 | [diff] [blame] | 1577 | break; |
| 1578 | case INDEX_op_ctpop_i64: |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 1579 | z_mask = 64 | 63; |
Richard Henderson | a768e4e | 2016-11-21 11:13:39 +0100 | [diff] [blame] | 1580 | break; |
| 1581 | |
Paolo Bonzini | 3a9d8b1 | 2013-01-11 15:42:52 -0800 | [diff] [blame] | 1582 | CASE_OP_32_64(setcond): |
Richard Henderson | a763551 | 2014-04-23 22:18:30 -0700 | [diff] [blame] | 1583 | case INDEX_op_setcond2_i32: |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 1584 | z_mask = 1; |
Paolo Bonzini | 3a9d8b1 | 2013-01-11 15:42:52 -0800 | [diff] [blame] | 1585 | break; |
| 1586 | |
| 1587 | CASE_OP_32_64(movcond): |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 1588 | z_mask = arg_info(op->args[3])->z_mask |
| 1589 | | arg_info(op->args[4])->z_mask; |
Paolo Bonzini | 3a9d8b1 | 2013-01-11 15:42:52 -0800 | [diff] [blame] | 1590 | break; |
| 1591 | |
Aurelien Jarno | c8d7027 | 2013-09-03 08:27:39 +0200 | [diff] [blame] | 1592 | CASE_OP_32_64(ld8u): |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 1593 | z_mask = 0xff; |
Aurelien Jarno | c8d7027 | 2013-09-03 08:27:39 +0200 | [diff] [blame] | 1594 | break; |
| 1595 | CASE_OP_32_64(ld16u): |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 1596 | z_mask = 0xffff; |
Aurelien Jarno | c8d7027 | 2013-09-03 08:27:39 +0200 | [diff] [blame] | 1597 | break; |
| 1598 | case INDEX_op_ld32u_i64: |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 1599 | z_mask = 0xffffffffu; |
Aurelien Jarno | c8d7027 | 2013-09-03 08:27:39 +0200 | [diff] [blame] | 1600 | break; |
| 1601 | |
| 1602 | CASE_OP_32_64(qemu_ld): |
| 1603 | { |
Richard Henderson | ec5d4cb | 2021-08-24 08:20:27 -0700 | [diff] [blame] | 1604 | MemOpIdx oi = op->args[def->nb_oargs + def->nb_iargs]; |
Tony Nguyen | 14776ab | 2019-08-24 04:10:58 +1000 | [diff] [blame] | 1605 | MemOp mop = get_memop(oi); |
Aurelien Jarno | c8d7027 | 2013-09-03 08:27:39 +0200 | [diff] [blame] | 1606 | if (!(mop & MO_SIGN)) { |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 1607 | z_mask = (2ULL << ((8 << (mop & MO_SIZE)) - 1)) - 1; |
Aurelien Jarno | c8d7027 | 2013-09-03 08:27:39 +0200 | [diff] [blame] | 1608 | } |
| 1609 | } |
| 1610 | break; |
| 1611 | |
Richard Henderson | 0b76ff8 | 2021-06-13 13:04:00 -0700 | [diff] [blame] | 1612 | CASE_OP_32_64(bswap16): |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 1613 | z_mask = arg_info(op->args[1])->z_mask; |
| 1614 | if (z_mask <= 0xffff) { |
Richard Henderson | 0b76ff8 | 2021-06-13 13:04:00 -0700 | [diff] [blame] | 1615 | op->args[2] |= TCG_BSWAP_IZ; |
| 1616 | } |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 1617 | z_mask = bswap16(z_mask); |
Richard Henderson | 0b76ff8 | 2021-06-13 13:04:00 -0700 | [diff] [blame] | 1618 | switch (op->args[2] & (TCG_BSWAP_OZ | TCG_BSWAP_OS)) { |
| 1619 | case TCG_BSWAP_OZ: |
| 1620 | break; |
| 1621 | case TCG_BSWAP_OS: |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 1622 | z_mask = (int16_t)z_mask; |
Richard Henderson | 0b76ff8 | 2021-06-13 13:04:00 -0700 | [diff] [blame] | 1623 | break; |
| 1624 | default: /* undefined high bits */ |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 1625 | z_mask |= MAKE_64BIT_MASK(16, 48); |
Richard Henderson | 0b76ff8 | 2021-06-13 13:04:00 -0700 | [diff] [blame] | 1626 | break; |
| 1627 | } |
| 1628 | break; |
| 1629 | |
| 1630 | case INDEX_op_bswap32_i64: |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 1631 | z_mask = arg_info(op->args[1])->z_mask; |
| 1632 | if (z_mask <= 0xffffffffu) { |
Richard Henderson | 0b76ff8 | 2021-06-13 13:04:00 -0700 | [diff] [blame] | 1633 | op->args[2] |= TCG_BSWAP_IZ; |
| 1634 | } |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 1635 | z_mask = bswap32(z_mask); |
Richard Henderson | 0b76ff8 | 2021-06-13 13:04:00 -0700 | [diff] [blame] | 1636 | switch (op->args[2] & (TCG_BSWAP_OZ | TCG_BSWAP_OS)) { |
| 1637 | case TCG_BSWAP_OZ: |
| 1638 | break; |
| 1639 | case TCG_BSWAP_OS: |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 1640 | z_mask = (int32_t)z_mask; |
Richard Henderson | 0b76ff8 | 2021-06-13 13:04:00 -0700 | [diff] [blame] | 1641 | break; |
| 1642 | default: /* undefined high bits */ |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 1643 | z_mask |= MAKE_64BIT_MASK(32, 32); |
Richard Henderson | 0b76ff8 | 2021-06-13 13:04:00 -0700 | [diff] [blame] | 1644 | break; |
| 1645 | } |
| 1646 | break; |
| 1647 | |
Paolo Bonzini | 3a9d8b1 | 2013-01-11 15:42:52 -0800 | [diff] [blame] | 1648 | default: |
| 1649 | break; |
| 1650 | } |
| 1651 | |
Richard Henderson | bc8d688 | 2014-06-08 18:24:14 -0700 | [diff] [blame] | 1652 | /* 32-bit ops generate 32-bit results. For the result is zero test |
| 1653 | below, we can ignore high bits, but for further optimizations we |
| 1654 | need to record that the high bits contain garbage. */ |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 1655 | partmask = z_mask; |
Richard Henderson | bc8d688 | 2014-06-08 18:24:14 -0700 | [diff] [blame] | 1656 | if (!(def->flags & TCG_OPF_64BIT)) { |
Richard Henderson | b1fde41 | 2021-08-23 13:07:49 -0700 | [diff] [blame] | 1657 | z_mask |= ~(tcg_target_ulong)0xffffffffu; |
Richard Henderson | 24666ba | 2014-05-22 11:14:10 -0700 | [diff] [blame] | 1658 | partmask &= 0xffffffffu; |
| 1659 | affected &= 0xffffffffu; |
Aurelien Jarno | f096dc9 | 2013-09-03 08:27:38 +0200 | [diff] [blame] | 1660 | } |
Richard Henderson | 137f1f4 | 2021-08-24 08:49:25 -0700 | [diff] [blame] | 1661 | ctx.z_mask = z_mask; |
Aurelien Jarno | f096dc9 | 2013-09-03 08:27:38 +0200 | [diff] [blame] | 1662 | |
Richard Henderson | 24666ba | 2014-05-22 11:14:10 -0700 | [diff] [blame] | 1663 | if (partmask == 0) { |
Richard Henderson | dc84988 | 2021-08-24 07:13:45 -0700 | [diff] [blame] | 1664 | tcg_opt_gen_movi(&ctx, op, op->args[0], 0); |
Paolo Bonzini | 633f650 | 2013-01-11 15:42:53 -0800 | [diff] [blame] | 1665 | continue; |
| 1666 | } |
| 1667 | if (affected == 0) { |
Richard Henderson | dc84988 | 2021-08-24 07:13:45 -0700 | [diff] [blame] | 1668 | tcg_opt_gen_mov(&ctx, op, op->args[0], op->args[1]); |
Paolo Bonzini | 633f650 | 2013-01-11 15:42:53 -0800 | [diff] [blame] | 1669 | continue; |
| 1670 | } |
| 1671 | |
Aurelien Jarno | 56e4943 | 2012-09-06 16:47:13 +0200 | [diff] [blame] | 1672 | /* Simplify expression for "op r, a, 0 => movi r, 0" cases */ |
Richard Henderson | c45cb8b | 2014-09-19 13:49:15 -0700 | [diff] [blame] | 1673 | switch (opc) { |
Richard Henderson | 170ba88 | 2017-11-22 09:07:11 +0100 | [diff] [blame] | 1674 | CASE_OP_32_64_VEC(and): |
| 1675 | CASE_OP_32_64_VEC(mul): |
Richard Henderson | 0327152 | 2013-08-14 14:35:56 -0700 | [diff] [blame] | 1676 | CASE_OP_32_64(muluh): |
| 1677 | CASE_OP_32_64(mulsh): |
Richard Henderson | 6349039 | 2017-06-20 13:43:15 -0700 | [diff] [blame] | 1678 | if (arg_is_const(op->args[2]) |
| 1679 | && arg_info(op->args[2])->val == 0) { |
Richard Henderson | dc84988 | 2021-08-24 07:13:45 -0700 | [diff] [blame] | 1680 | tcg_opt_gen_movi(&ctx, op, op->args[0], 0); |
Kirill Batuzov | 53108fb | 2011-07-07 16:37:14 +0400 | [diff] [blame] | 1681 | continue; |
| 1682 | } |
| 1683 | break; |
Aurelien Jarno | 56e4943 | 2012-09-06 16:47:13 +0200 | [diff] [blame] | 1684 | default: |
| 1685 | break; |
| 1686 | } |
| 1687 | |
| 1688 | /* Simplify expression for "op r, a, a => mov r, a" cases */ |
Richard Henderson | c45cb8b | 2014-09-19 13:49:15 -0700 | [diff] [blame] | 1689 | switch (opc) { |
Richard Henderson | 170ba88 | 2017-11-22 09:07:11 +0100 | [diff] [blame] | 1690 | CASE_OP_32_64_VEC(or): |
| 1691 | CASE_OP_32_64_VEC(and): |
Richard Henderson | 6349039 | 2017-06-20 13:43:15 -0700 | [diff] [blame] | 1692 | if (args_are_copies(op->args[1], op->args[2])) { |
Richard Henderson | dc84988 | 2021-08-24 07:13:45 -0700 | [diff] [blame] | 1693 | tcg_opt_gen_mov(&ctx, op, op->args[0], op->args[1]); |
Kirill Batuzov | 9a81090 | 2011-07-07 16:37:15 +0400 | [diff] [blame] | 1694 | continue; |
| 1695 | } |
| 1696 | break; |
Blue Swirl | fe0de7a | 2011-07-30 19:18:32 +0000 | [diff] [blame] | 1697 | default: |
| 1698 | break; |
Kirill Batuzov | 53108fb | 2011-07-07 16:37:14 +0400 | [diff] [blame] | 1699 | } |
| 1700 | |
Aurelien Jarno | 3c94193 | 2012-09-18 19:12:36 +0200 | [diff] [blame] | 1701 | /* Simplify expression for "op r, a, a => movi r, 0" cases */ |
Richard Henderson | c45cb8b | 2014-09-19 13:49:15 -0700 | [diff] [blame] | 1702 | switch (opc) { |
Richard Henderson | 170ba88 | 2017-11-22 09:07:11 +0100 | [diff] [blame] | 1703 | CASE_OP_32_64_VEC(andc): |
| 1704 | CASE_OP_32_64_VEC(sub): |
| 1705 | CASE_OP_32_64_VEC(xor): |
Richard Henderson | 6349039 | 2017-06-20 13:43:15 -0700 | [diff] [blame] | 1706 | if (args_are_copies(op->args[1], op->args[2])) { |
Richard Henderson | dc84988 | 2021-08-24 07:13:45 -0700 | [diff] [blame] | 1707 | tcg_opt_gen_movi(&ctx, op, op->args[0], 0); |
Aurelien Jarno | 3c94193 | 2012-09-18 19:12:36 +0200 | [diff] [blame] | 1708 | continue; |
| 1709 | } |
| 1710 | break; |
| 1711 | default: |
| 1712 | break; |
| 1713 | } |
| 1714 | |
Kirill Batuzov | 22613af | 2011-07-07 16:37:13 +0400 | [diff] [blame] | 1715 | /* Propagate constants through copy operations and do constant |
| 1716 | folding. Constants will be substituted to arguments by register |
| 1717 | allocator where needed and possible. Also detect copies. */ |
Richard Henderson | c45cb8b | 2014-09-19 13:49:15 -0700 | [diff] [blame] | 1718 | switch (opc) { |
Richard Henderson | 170ba88 | 2017-11-22 09:07:11 +0100 | [diff] [blame] | 1719 | CASE_OP_32_64_VEC(mov): |
Richard Henderson | 404a148 | 2021-08-24 11:08:21 -0700 | [diff] [blame] | 1720 | done = tcg_opt_gen_mov(&ctx, op, op->args[0], op->args[1]); |
| 1721 | break; |
Richard Henderson | 6e14e91 | 2012-10-02 11:32:24 -0700 | [diff] [blame] | 1722 | |
Richard Henderson | 170ba88 | 2017-11-22 09:07:11 +0100 | [diff] [blame] | 1723 | case INDEX_op_dup_vec: |
| 1724 | if (arg_is_const(op->args[1])) { |
| 1725 | tmp = arg_info(op->args[1])->val; |
| 1726 | tmp = dup_const(TCGOP_VECE(op), tmp); |
Richard Henderson | dc84988 | 2021-08-24 07:13:45 -0700 | [diff] [blame] | 1727 | tcg_opt_gen_movi(&ctx, op, op->args[0], tmp); |
Richard Henderson | b10f383 | 2021-08-23 22:30:17 -0700 | [diff] [blame] | 1728 | continue; |
Richard Henderson | 170ba88 | 2017-11-22 09:07:11 +0100 | [diff] [blame] | 1729 | } |
Richard Henderson | b10f383 | 2021-08-23 22:30:17 -0700 | [diff] [blame] | 1730 | break; |
Richard Henderson | 170ba88 | 2017-11-22 09:07:11 +0100 | [diff] [blame] | 1731 | |
Richard Henderson | 1dc4fe7 | 2020-09-05 17:03:35 -0700 | [diff] [blame] | 1732 | case INDEX_op_dup2_vec: |
| 1733 | assert(TCG_TARGET_REG_BITS == 32); |
| 1734 | if (arg_is_const(op->args[1]) && arg_is_const(op->args[2])) { |
Richard Henderson | dc84988 | 2021-08-24 07:13:45 -0700 | [diff] [blame] | 1735 | tcg_opt_gen_movi(&ctx, op, op->args[0], |
Richard Henderson | 0b4286d | 2020-09-06 17:33:18 -0700 | [diff] [blame] | 1736 | deposit64(arg_info(op->args[1])->val, 32, 32, |
| 1737 | arg_info(op->args[2])->val)); |
Richard Henderson | b10f383 | 2021-08-23 22:30:17 -0700 | [diff] [blame] | 1738 | continue; |
Richard Henderson | 1dc4fe7 | 2020-09-05 17:03:35 -0700 | [diff] [blame] | 1739 | } else if (args_are_copies(op->args[1], op->args[2])) { |
| 1740 | op->opc = INDEX_op_dup_vec; |
| 1741 | TCGOP_VECE(op) = MO_32; |
Richard Henderson | 1dc4fe7 | 2020-09-05 17:03:35 -0700 | [diff] [blame] | 1742 | } |
Richard Henderson | b10f383 | 2021-08-23 22:30:17 -0700 | [diff] [blame] | 1743 | break; |
Richard Henderson | 1dc4fe7 | 2020-09-05 17:03:35 -0700 | [diff] [blame] | 1744 | |
Richard Henderson | 0b76ff8 | 2021-06-13 13:04:00 -0700 | [diff] [blame] | 1745 | CASE_OP_32_64(bswap16): |
| 1746 | CASE_OP_32_64(bswap32): |
| 1747 | case INDEX_op_bswap64_i64: |
| 1748 | if (arg_is_const(op->args[1])) { |
| 1749 | tmp = do_constant_folding(opc, arg_info(op->args[1])->val, |
| 1750 | op->args[2]); |
Richard Henderson | dc84988 | 2021-08-24 07:13:45 -0700 | [diff] [blame] | 1751 | tcg_opt_gen_movi(&ctx, op, op->args[0], tmp); |
Richard Henderson | b10f383 | 2021-08-23 22:30:17 -0700 | [diff] [blame] | 1752 | continue; |
Richard Henderson | 0b76ff8 | 2021-06-13 13:04:00 -0700 | [diff] [blame] | 1753 | } |
Richard Henderson | b10f383 | 2021-08-23 22:30:17 -0700 | [diff] [blame] | 1754 | break; |
Richard Henderson | 0b76ff8 | 2021-06-13 13:04:00 -0700 | [diff] [blame] | 1755 | |
Richard Henderson | 2f9f08b | 2021-08-25 12:03:48 -0700 | [diff] [blame] | 1756 | default: |
| 1757 | break; |
| 1758 | |
| 1759 | /* ---------------------------------------------------------- */ |
| 1760 | /* Sorted alphabetically by opcode as much as possible. */ |
| 1761 | |
| 1762 | CASE_OP_32_64_VEC(add): |
| 1763 | done = fold_add(&ctx, op); |
| 1764 | break; |
Richard Henderson | e3f7dc2 | 2021-08-24 10:30:38 -0700 | [diff] [blame] | 1765 | case INDEX_op_add2_i32: |
| 1766 | done = fold_add2_i32(&ctx, op); |
| 1767 | break; |
Richard Henderson | 2f9f08b | 2021-08-25 12:03:48 -0700 | [diff] [blame] | 1768 | CASE_OP_32_64_VEC(and): |
| 1769 | done = fold_and(&ctx, op); |
| 1770 | break; |
| 1771 | CASE_OP_32_64_VEC(andc): |
| 1772 | done = fold_andc(&ctx, op); |
| 1773 | break; |
Richard Henderson | 079b080 | 2021-08-24 09:30:59 -0700 | [diff] [blame] | 1774 | CASE_OP_32_64(brcond): |
| 1775 | done = fold_brcond(&ctx, op); |
| 1776 | break; |
Richard Henderson | 764d2ab | 2021-08-24 09:22:11 -0700 | [diff] [blame] | 1777 | case INDEX_op_brcond2_i32: |
| 1778 | done = fold_brcond2(&ctx, op); |
| 1779 | break; |
Richard Henderson | 30dd0bf | 2021-08-24 10:51:34 -0700 | [diff] [blame^] | 1780 | CASE_OP_32_64(clz): |
| 1781 | CASE_OP_32_64(ctz): |
| 1782 | done = fold_count_zeros(&ctx, op); |
| 1783 | break; |
Richard Henderson | 2f9f08b | 2021-08-25 12:03:48 -0700 | [diff] [blame] | 1784 | CASE_OP_32_64(ctpop): |
| 1785 | done = fold_ctpop(&ctx, op); |
| 1786 | break; |
Richard Henderson | 1b1907b | 2021-08-24 10:47:04 -0700 | [diff] [blame] | 1787 | CASE_OP_32_64(deposit): |
| 1788 | done = fold_deposit(&ctx, op); |
| 1789 | break; |
Richard Henderson | 2f9f08b | 2021-08-25 12:03:48 -0700 | [diff] [blame] | 1790 | CASE_OP_32_64(div): |
| 1791 | CASE_OP_32_64(divu): |
| 1792 | done = fold_divide(&ctx, op); |
| 1793 | break; |
| 1794 | CASE_OP_32_64(eqv): |
| 1795 | done = fold_eqv(&ctx, op); |
| 1796 | break; |
Richard Henderson | b6617c8 | 2021-08-24 10:44:53 -0700 | [diff] [blame] | 1797 | CASE_OP_32_64(extract): |
| 1798 | done = fold_extract(&ctx, op); |
| 1799 | break; |
Richard Henderson | dcd0899 | 2021-08-24 10:41:39 -0700 | [diff] [blame] | 1800 | CASE_OP_32_64(extract2): |
| 1801 | done = fold_extract2(&ctx, op); |
| 1802 | break; |
Richard Henderson | 2f9f08b | 2021-08-25 12:03:48 -0700 | [diff] [blame] | 1803 | CASE_OP_32_64(ext8s): |
| 1804 | CASE_OP_32_64(ext16s): |
| 1805 | case INDEX_op_ext32s_i64: |
| 1806 | case INDEX_op_ext_i32_i64: |
| 1807 | done = fold_exts(&ctx, op); |
| 1808 | break; |
| 1809 | CASE_OP_32_64(ext8u): |
| 1810 | CASE_OP_32_64(ext16u): |
| 1811 | case INDEX_op_ext32u_i64: |
| 1812 | case INDEX_op_extu_i32_i64: |
| 1813 | case INDEX_op_extrl_i64_i32: |
| 1814 | case INDEX_op_extrh_i64_i32: |
| 1815 | done = fold_extu(&ctx, op); |
| 1816 | break; |
Richard Henderson | 3eefdf2 | 2021-08-25 11:06:43 -0700 | [diff] [blame] | 1817 | case INDEX_op_mb: |
| 1818 | done = fold_mb(&ctx, op); |
| 1819 | break; |
Richard Henderson | 0c310a3 | 2021-08-24 10:37:24 -0700 | [diff] [blame] | 1820 | CASE_OP_32_64(movcond): |
| 1821 | done = fold_movcond(&ctx, op); |
| 1822 | break; |
Richard Henderson | 2f9f08b | 2021-08-25 12:03:48 -0700 | [diff] [blame] | 1823 | CASE_OP_32_64(mul): |
| 1824 | done = fold_mul(&ctx, op); |
| 1825 | break; |
| 1826 | CASE_OP_32_64(mulsh): |
| 1827 | CASE_OP_32_64(muluh): |
| 1828 | done = fold_mul_highpart(&ctx, op); |
| 1829 | break; |
Richard Henderson | 6b8ac0d | 2021-08-24 10:24:12 -0700 | [diff] [blame] | 1830 | case INDEX_op_mulu2_i32: |
| 1831 | done = fold_mulu2_i32(&ctx, op); |
| 1832 | break; |
Richard Henderson | 2f9f08b | 2021-08-25 12:03:48 -0700 | [diff] [blame] | 1833 | CASE_OP_32_64(nand): |
| 1834 | done = fold_nand(&ctx, op); |
| 1835 | break; |
| 1836 | CASE_OP_32_64(neg): |
| 1837 | done = fold_neg(&ctx, op); |
| 1838 | break; |
| 1839 | CASE_OP_32_64(nor): |
| 1840 | done = fold_nor(&ctx, op); |
| 1841 | break; |
| 1842 | CASE_OP_32_64_VEC(not): |
| 1843 | done = fold_not(&ctx, op); |
| 1844 | break; |
| 1845 | CASE_OP_32_64_VEC(or): |
| 1846 | done = fold_or(&ctx, op); |
| 1847 | break; |
| 1848 | CASE_OP_32_64_VEC(orc): |
| 1849 | done = fold_orc(&ctx, op); |
| 1850 | break; |
Richard Henderson | 3eefdf2 | 2021-08-25 11:06:43 -0700 | [diff] [blame] | 1851 | case INDEX_op_qemu_ld_i32: |
| 1852 | case INDEX_op_qemu_ld_i64: |
| 1853 | done = fold_qemu_ld(&ctx, op); |
| 1854 | break; |
| 1855 | case INDEX_op_qemu_st_i32: |
| 1856 | case INDEX_op_qemu_st8_i32: |
| 1857 | case INDEX_op_qemu_st_i64: |
| 1858 | done = fold_qemu_st(&ctx, op); |
| 1859 | break; |
Richard Henderson | 2f9f08b | 2021-08-25 12:03:48 -0700 | [diff] [blame] | 1860 | CASE_OP_32_64(rem): |
| 1861 | CASE_OP_32_64(remu): |
| 1862 | done = fold_remainder(&ctx, op); |
| 1863 | break; |
| 1864 | CASE_OP_32_64(rotl): |
| 1865 | CASE_OP_32_64(rotr): |
| 1866 | CASE_OP_32_64(sar): |
| 1867 | CASE_OP_32_64(shl): |
| 1868 | CASE_OP_32_64(shr): |
| 1869 | done = fold_shift(&ctx, op); |
| 1870 | break; |
Richard Henderson | c63ff55 | 2021-08-24 09:35:30 -0700 | [diff] [blame] | 1871 | CASE_OP_32_64(setcond): |
| 1872 | done = fold_setcond(&ctx, op); |
| 1873 | break; |
Richard Henderson | bc47b1a | 2021-08-24 09:09:35 -0700 | [diff] [blame] | 1874 | case INDEX_op_setcond2_i32: |
| 1875 | done = fold_setcond2(&ctx, op); |
| 1876 | break; |
Richard Henderson | b6617c8 | 2021-08-24 10:44:53 -0700 | [diff] [blame] | 1877 | CASE_OP_32_64(sextract): |
| 1878 | done = fold_sextract(&ctx, op); |
| 1879 | break; |
Richard Henderson | 2f9f08b | 2021-08-25 12:03:48 -0700 | [diff] [blame] | 1880 | CASE_OP_32_64_VEC(sub): |
| 1881 | done = fold_sub(&ctx, op); |
| 1882 | break; |
Richard Henderson | e3f7dc2 | 2021-08-24 10:30:38 -0700 | [diff] [blame] | 1883 | case INDEX_op_sub2_i32: |
| 1884 | done = fold_sub2_i32(&ctx, op); |
| 1885 | break; |
Richard Henderson | 2f9f08b | 2021-08-25 12:03:48 -0700 | [diff] [blame] | 1886 | CASE_OP_32_64_VEC(xor): |
| 1887 | done = fold_xor(&ctx, op); |
Richard Henderson | b10f383 | 2021-08-23 22:30:17 -0700 | [diff] [blame] | 1888 | break; |
| 1889 | } |
| 1890 | |
Richard Henderson | 404a148 | 2021-08-24 11:08:21 -0700 | [diff] [blame] | 1891 | if (!done) { |
| 1892 | finish_folding(&ctx, op); |
| 1893 | } |
Kirill Batuzov | 8f2e8c0 | 2011-07-07 16:37:12 +0400 | [diff] [blame] | 1894 | } |
Kirill Batuzov | 8f2e8c0 | 2011-07-07 16:37:12 +0400 | [diff] [blame] | 1895 | } |