1 /* 2 * AArch64 SME translation 3 * 4 * Copyright (c) 2022 Linaro, Ltd 5 * 6 * This library is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2.1 of the License, or (at your option) any later version. 10 * 11 * This library is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with this library; if not, see <http://www.gnu.org/licenses/>. 18 */ 19 20 #include "qemu/osdep.h" 21 #include "translate.h" 22 #include "translate-a64.h" 23 24 /* 25 * Include the generated decoder. 26 */ 27 28 #include "decode-sme.c.inc" 29 30 31 /* 32 * Resolve tile.size[index] to a host pointer, where tile and index 33 * are always decoded together, dependent on the element size. 34 */ 35 static TCGv_ptr get_tile_rowcol(DisasContext *s, int esz, int rs, 36 int tile_index, bool vertical) 37 { 38 int tile = tile_index >> (4 - esz); 39 int index = esz == MO_128 ? 0 : extract32(tile_index, 0, 4 - esz); 40 int pos, len, offset; 41 TCGv_i32 tmp; 42 TCGv_ptr addr; 43 44 /* Compute the final index, which is Rs+imm. */ 45 tmp = tcg_temp_new_i32(); 46 tcg_gen_trunc_tl_i32(tmp, cpu_reg(s, rs)); 47 tcg_gen_addi_i32(tmp, tmp, index); 48 49 /* Prepare a power-of-two modulo via extraction of @len bits. */ 50 len = ctz32(streaming_vec_reg_size(s)) - esz; 51 52 if (vertical) { 53 /* 54 * Compute the byte offset of the index within the tile: 55 * (index % (svl / size)) * size 56 * = (index % (svl >> esz)) << esz 57 * Perform the power-of-two modulo via extraction of the low @len bits. 58 * Perform the multiply by shifting left by @pos bits. 59 * Perform these operations simultaneously via deposit into zero. 60 */ 61 pos = esz; 62 tcg_gen_deposit_z_i32(tmp, tmp, pos, len); 63 64 /* 65 * For big-endian, adjust the indexed column byte offset within 66 * the uint64_t host words that make up env->zarray[]. 67 */ 68 if (HOST_BIG_ENDIAN && esz < MO_64) { 69 tcg_gen_xori_i32(tmp, tmp, 8 - (1 << esz)); 70 } 71 } else { 72 /* 73 * Compute the byte offset of the index within the tile: 74 * (index % (svl / size)) * (size * sizeof(row)) 75 * = (index % (svl >> esz)) << (esz + log2(sizeof(row))) 76 */ 77 pos = esz + ctz32(sizeof(ARMVectorReg)); 78 tcg_gen_deposit_z_i32(tmp, tmp, pos, len); 79 80 /* Row slices are always aligned and need no endian adjustment. */ 81 } 82 83 /* The tile byte offset within env->zarray is the row. */ 84 offset = tile * sizeof(ARMVectorReg); 85 86 /* Include the byte offset of zarray to make this relative to env. */ 87 offset += offsetof(CPUARMState, zarray); 88 tcg_gen_addi_i32(tmp, tmp, offset); 89 90 /* Add the byte offset to env to produce the final pointer. */ 91 addr = tcg_temp_new_ptr(); 92 tcg_gen_ext_i32_ptr(addr, tmp); 93 tcg_gen_add_ptr(addr, addr, tcg_env); 94 95 return addr; 96 } 97 98 /* 99 * Resolve tile.size[0] to a host pointer. 100 * Used by e.g. outer product insns where we require the entire tile. 101 */ 102 static TCGv_ptr get_tile(DisasContext *s, int esz, int tile) 103 { 104 TCGv_ptr addr = tcg_temp_new_ptr(); 105 int offset; 106 107 offset = tile * sizeof(ARMVectorReg) + offsetof(CPUARMState, zarray); 108 109 tcg_gen_addi_ptr(addr, tcg_env, offset); 110 return addr; 111 } 112 113 static bool trans_ZERO(DisasContext *s, arg_ZERO *a) 114 { 115 if (!dc_isar_feature(aa64_sme, s)) { 116 return false; 117 } 118 if (sme_za_enabled_check(s)) { 119 gen_helper_sme_zero(tcg_env, tcg_constant_i32(a->imm), 120 tcg_constant_i32(streaming_vec_reg_size(s))); 121 } 122 return true; 123 } 124 125 static bool trans_MOVA(DisasContext *s, arg_MOVA *a) 126 { 127 static gen_helper_gvec_4 * const h_fns[5] = { 128 gen_helper_sve_sel_zpzz_b, gen_helper_sve_sel_zpzz_h, 129 gen_helper_sve_sel_zpzz_s, gen_helper_sve_sel_zpzz_d, 130 gen_helper_sve_sel_zpzz_q 131 }; 132 static gen_helper_gvec_3 * const cz_fns[5] = { 133 gen_helper_sme_mova_cz_b, gen_helper_sme_mova_cz_h, 134 gen_helper_sme_mova_cz_s, gen_helper_sme_mova_cz_d, 135 gen_helper_sme_mova_cz_q, 136 }; 137 static gen_helper_gvec_3 * const zc_fns[5] = { 138 gen_helper_sme_mova_zc_b, gen_helper_sme_mova_zc_h, 139 gen_helper_sme_mova_zc_s, gen_helper_sme_mova_zc_d, 140 gen_helper_sme_mova_zc_q, 141 }; 142 143 TCGv_ptr t_za, t_zr, t_pg; 144 TCGv_i32 t_desc; 145 int svl; 146 147 if (!dc_isar_feature(aa64_sme, s)) { 148 return false; 149 } 150 if (!sme_smza_enabled_check(s)) { 151 return true; 152 } 153 154 t_za = get_tile_rowcol(s, a->esz, a->rs, a->za_imm, a->v); 155 t_zr = vec_full_reg_ptr(s, a->zr); 156 t_pg = pred_full_reg_ptr(s, a->pg); 157 158 svl = streaming_vec_reg_size(s); 159 t_desc = tcg_constant_i32(simd_desc(svl, svl, 0)); 160 161 if (a->v) { 162 /* Vertical slice -- use sme mova helpers. */ 163 if (a->to_vec) { 164 zc_fns[a->esz](t_zr, t_za, t_pg, t_desc); 165 } else { 166 cz_fns[a->esz](t_za, t_zr, t_pg, t_desc); 167 } 168 } else { 169 /* Horizontal slice -- reuse sve sel helpers. */ 170 if (a->to_vec) { 171 h_fns[a->esz](t_zr, t_za, t_zr, t_pg, t_desc); 172 } else { 173 h_fns[a->esz](t_za, t_zr, t_za, t_pg, t_desc); 174 } 175 } 176 return true; 177 } 178 179 static bool trans_LDST1(DisasContext *s, arg_LDST1 *a) 180 { 181 typedef void GenLdSt1(TCGv_env, TCGv_ptr, TCGv_ptr, TCGv, TCGv_i32); 182 183 /* 184 * Indexed by [esz][be][v][mte][st], which is (except for load/store) 185 * also the order in which the elements appear in the function names, 186 * and so how we must concatenate the pieces. 187 */ 188 189 #define FN_LS(F) { gen_helper_sme_ld1##F, gen_helper_sme_st1##F } 190 #define FN_MTE(F) { FN_LS(F), FN_LS(F##_mte) } 191 #define FN_HV(F) { FN_MTE(F##_h), FN_MTE(F##_v) } 192 #define FN_END(L, B) { FN_HV(L), FN_HV(B) } 193 194 static GenLdSt1 * const fns[5][2][2][2][2] = { 195 FN_END(b, b), 196 FN_END(h_le, h_be), 197 FN_END(s_le, s_be), 198 FN_END(d_le, d_be), 199 FN_END(q_le, q_be), 200 }; 201 202 #undef FN_LS 203 #undef FN_MTE 204 #undef FN_HV 205 #undef FN_END 206 207 TCGv_ptr t_za, t_pg; 208 TCGv_i64 addr; 209 int svl, desc = 0; 210 bool be = s->be_data == MO_BE; 211 bool mte = s->mte_active[0]; 212 213 if (!dc_isar_feature(aa64_sme, s)) { 214 return false; 215 } 216 if (!sme_smza_enabled_check(s)) { 217 return true; 218 } 219 220 t_za = get_tile_rowcol(s, a->esz, a->rs, a->za_imm, a->v); 221 t_pg = pred_full_reg_ptr(s, a->pg); 222 addr = tcg_temp_new_i64(); 223 224 tcg_gen_shli_i64(addr, cpu_reg(s, a->rm), a->esz); 225 tcg_gen_add_i64(addr, addr, cpu_reg_sp(s, a->rn)); 226 227 if (mte) { 228 desc = FIELD_DP32(desc, MTEDESC, MIDX, get_mem_index(s)); 229 desc = FIELD_DP32(desc, MTEDESC, TBI, s->tbid); 230 desc = FIELD_DP32(desc, MTEDESC, TCMA, s->tcma); 231 desc = FIELD_DP32(desc, MTEDESC, WRITE, a->st); 232 desc = FIELD_DP32(desc, MTEDESC, SIZEM1, (1 << a->esz) - 1); 233 desc <<= SVE_MTEDESC_SHIFT; 234 } else { 235 addr = clean_data_tbi(s, addr); 236 } 237 svl = streaming_vec_reg_size(s); 238 desc = simd_desc(svl, svl, desc); 239 240 fns[a->esz][be][a->v][mte][a->st](tcg_env, t_za, t_pg, addr, 241 tcg_constant_i32(desc)); 242 return true; 243 } 244 245 typedef void GenLdStR(DisasContext *, TCGv_ptr, int, int, int, int); 246 247 static bool do_ldst_r(DisasContext *s, arg_ldstr *a, GenLdStR *fn) 248 { 249 int svl = streaming_vec_reg_size(s); 250 int imm = a->imm; 251 TCGv_ptr base; 252 253 if (!sme_za_enabled_check(s)) { 254 return true; 255 } 256 257 /* ZA[n] equates to ZA0H.B[n]. */ 258 base = get_tile_rowcol(s, MO_8, a->rv, imm, false); 259 260 fn(s, base, 0, svl, a->rn, imm * svl); 261 return true; 262 } 263 264 TRANS_FEAT(LDR, aa64_sme, do_ldst_r, a, gen_sve_ldr) 265 TRANS_FEAT(STR, aa64_sme, do_ldst_r, a, gen_sve_str) 266 267 static bool do_adda(DisasContext *s, arg_adda *a, MemOp esz, 268 gen_helper_gvec_4 *fn) 269 { 270 int svl = streaming_vec_reg_size(s); 271 uint32_t desc = simd_desc(svl, svl, 0); 272 TCGv_ptr za, zn, pn, pm; 273 274 if (!sme_smza_enabled_check(s)) { 275 return true; 276 } 277 278 za = get_tile(s, esz, a->zad); 279 zn = vec_full_reg_ptr(s, a->zn); 280 pn = pred_full_reg_ptr(s, a->pn); 281 pm = pred_full_reg_ptr(s, a->pm); 282 283 fn(za, zn, pn, pm, tcg_constant_i32(desc)); 284 return true; 285 } 286 287 TRANS_FEAT(ADDHA_s, aa64_sme, do_adda, a, MO_32, gen_helper_sme_addha_s) 288 TRANS_FEAT(ADDVA_s, aa64_sme, do_adda, a, MO_32, gen_helper_sme_addva_s) 289 TRANS_FEAT(ADDHA_d, aa64_sme_i16i64, do_adda, a, MO_64, gen_helper_sme_addha_d) 290 TRANS_FEAT(ADDVA_d, aa64_sme_i16i64, do_adda, a, MO_64, gen_helper_sme_addva_d) 291 292 static bool do_outprod(DisasContext *s, arg_op *a, MemOp esz, 293 gen_helper_gvec_5 *fn) 294 { 295 int svl = streaming_vec_reg_size(s); 296 uint32_t desc = simd_desc(svl, svl, a->sub); 297 TCGv_ptr za, zn, zm, pn, pm; 298 299 if (!sme_smza_enabled_check(s)) { 300 return true; 301 } 302 303 za = get_tile(s, esz, a->zad); 304 zn = vec_full_reg_ptr(s, a->zn); 305 zm = vec_full_reg_ptr(s, a->zm); 306 pn = pred_full_reg_ptr(s, a->pn); 307 pm = pred_full_reg_ptr(s, a->pm); 308 309 fn(za, zn, zm, pn, pm, tcg_constant_i32(desc)); 310 return true; 311 } 312 313 static bool do_outprod_fpst(DisasContext *s, arg_op *a, MemOp esz, 314 gen_helper_gvec_5_ptr *fn) 315 { 316 int svl = streaming_vec_reg_size(s); 317 uint32_t desc = simd_desc(svl, svl, a->sub); 318 TCGv_ptr za, zn, zm, pn, pm, fpst; 319 320 if (!sme_smza_enabled_check(s)) { 321 return true; 322 } 323 324 za = get_tile(s, esz, a->zad); 325 zn = vec_full_reg_ptr(s, a->zn); 326 zm = vec_full_reg_ptr(s, a->zm); 327 pn = pred_full_reg_ptr(s, a->pn); 328 pm = pred_full_reg_ptr(s, a->pm); 329 fpst = fpstatus_ptr(FPST_FPCR); 330 331 fn(za, zn, zm, pn, pm, fpst, tcg_constant_i32(desc)); 332 return true; 333 } 334 335 TRANS_FEAT(FMOPA_h, aa64_sme, do_outprod_fpst, a, MO_32, gen_helper_sme_fmopa_h) 336 TRANS_FEAT(FMOPA_s, aa64_sme, do_outprod_fpst, a, MO_32, gen_helper_sme_fmopa_s) 337 TRANS_FEAT(FMOPA_d, aa64_sme_f64f64, do_outprod_fpst, a, MO_64, gen_helper_sme_fmopa_d) 338 339 /* TODO: FEAT_EBF16 */ 340 TRANS_FEAT(BFMOPA, aa64_sme, do_outprod, a, MO_32, gen_helper_sme_bfmopa) 341 342 TRANS_FEAT(SMOPA_s, aa64_sme, do_outprod, a, MO_32, gen_helper_sme_smopa_s) 343 TRANS_FEAT(UMOPA_s, aa64_sme, do_outprod, a, MO_32, gen_helper_sme_umopa_s) 344 TRANS_FEAT(SUMOPA_s, aa64_sme, do_outprod, a, MO_32, gen_helper_sme_sumopa_s) 345 TRANS_FEAT(USMOPA_s, aa64_sme, do_outprod, a, MO_32, gen_helper_sme_usmopa_s) 346 347 TRANS_FEAT(SMOPA_d, aa64_sme_i16i64, do_outprod, a, MO_64, gen_helper_sme_smopa_d) 348 TRANS_FEAT(UMOPA_d, aa64_sme_i16i64, do_outprod, a, MO_64, gen_helper_sme_umopa_d) 349 TRANS_FEAT(SUMOPA_d, aa64_sme_i16i64, do_outprod, a, MO_64, gen_helper_sme_sumopa_d) 350 TRANS_FEAT(USMOPA_d, aa64_sme_i16i64, do_outprod, a, MO_64, gen_helper_sme_usmopa_d) 351