target/arm/tcg/translate.h

   1 #ifndef TARGET_ARM_TRANSLATE_H
   2 #define TARGET_ARM_TRANSLATE_H
   3
   4 #include "cpu.h"
   5 #include "tcg/tcg-op.h"
   6 #include "tcg/tcg-op-gvec.h"
   7 #include "exec/exec-all.h"
   8 #include "exec/translator.h"
   9 #include "exec/helper-gen.h"
  10 #include "internals.h"
  11 #include "cpu-features.h"
  12
  13 /* internal defines */
  14
  15 /*
  16  * Save pc_save across a branch, so that we may restore the value from
  17  * before the branch at the point the label is emitted.
  18  */
  19 typedef struct DisasLabel {
  20     TCGLabel *label;
  21     target_ulong pc_save;
  22 } DisasLabel;
  23
  24 typedef struct DisasContext {
  25     DisasContextBase base;
  26     const ARMISARegisters *isar;
  27
  28     /* The address of the current instruction being translated. */
  29     target_ulong pc_curr;
  30     /*
  31      * For CF_PCREL, the full value of cpu_pc is not known
  32      * (although the page offset is known).  For convenience, the
  33      * translation loop uses the full virtual address that triggered
  34      * the translation, from base.pc_start through pc_curr.
  35      * For efficiency, we do not update cpu_pc for every instruction.
  36      * Instead, pc_save has the value of pc_curr at the time of the
  37      * last update to cpu_pc, which allows us to compute the addend
  38      * needed to bring cpu_pc current: pc_curr - pc_save.
  39      * If cpu_pc now contains the destination of an indirect branch,
  40      * pc_save contains -1 to indicate that relative updates are no
  41      * longer possible.
  42      */
  43     target_ulong pc_save;
  44     target_ulong page_start;
  45     uint32_t insn;
  46     /* Nonzero if this instruction has been conditionally skipped.  */
  47     int condjmp;
  48     /* The label that will be jumped to when the instruction is skipped.  */
  49     DisasLabel condlabel;
  50     /* Thumb-2 conditional execution bits.  */
  51     int condexec_mask;
  52     int condexec_cond;
  53     /* M-profile ECI/ICI exception-continuable instruction state */
  54     int eci;
  55     /*
  56      * trans_ functions for insns which are continuable should set this true
  57      * after decode (ie after any UNDEF checks)
  58      */
  59     bool eci_handled;
  60     int sctlr_b;
  61     MemOp be_data;
  62 #if !defined(CONFIG_USER_ONLY)
  63     int user;
  64 #endif
  65     ARMMMUIdx mmu_idx; /* MMU index to use for normal loads/stores */
  66     uint8_t tbii;      /* TBI1|TBI0 for insns */
  67     uint8_t tbid;      /* TBI1|TBI0 for data */
  68     uint8_t tcma;      /* TCMA1|TCMA0 for MTE */
  69     bool ns;        /* Use non-secure CPREG bank on access */
  70     int fp_excp_el; /* FP exception EL or 0 if enabled */
  71     int sve_excp_el; /* SVE exception EL or 0 if enabled */
  72     int sme_excp_el; /* SME exception EL or 0 if enabled */
  73     int vl;          /* current vector length in bytes */
  74     int svl;         /* current streaming vector length in bytes */
  75     bool vfp_enabled; /* FP enabled via FPSCR.EN */
  76     int vec_len;
  77     int vec_stride;
  78     bool v7m_handler_mode;
  79     bool v8m_secure; /* true if v8M and we're in Secure mode */
  80     bool v8m_stackcheck; /* true if we need to perform v8M stack limit checks */
  81     bool v8m_fpccr_s_wrong; /* true if v8M FPCCR.S != v8m_secure */
  82     bool v7m_new_fp_ctxt_needed; /* ASPEN set but no active FP context */
  83     bool v7m_lspact; /* FPCCR.LSPACT set */
  84     /* Immediate value in AArch32 SVC insn; must be set if is_jmp == DISAS_SWI
  85      * so that top level loop can generate correct syndrome information.
  86      */
  87     uint32_t svc_imm;
  88     int current_el;
  89     GHashTable *cp_regs;
  90     uint64_t features; /* CPU features bits */
  91     bool aarch64;
  92     bool thumb;
  93     bool lse2;
  94     /* Because unallocated encodings generate different exception syndrome
  95      * information from traps due to FP being disabled, we can't do a single
  96      * "is fp access disabled" check at a high level in the decode tree.
  97      * To help in catching bugs where the access check was forgotten in some
  98      * code path, we set this flag when the access check is done, and assert
  99      * that it is set at the point where we actually touch the FP regs.
 100      */
 101     bool fp_access_checked;
 102     bool sve_access_checked;
 103     /* ARMv8 single-step state (this is distinct from the QEMU gdbstub
 104      * single-step support).
 105      */
 106     bool ss_active;
 107     bool pstate_ss;
 108     /* True if the insn just emitted was a load-exclusive instruction
 109      * (necessary for syndrome information for single step exceptions),
 110      * ie A64 LDX*, LDAX*, A32/T32 LDREX*, LDAEX*.
 111      */
 112     bool is_ldex;
 113     /* True if AccType_UNPRIV should be used for LDTR et al */
 114     bool unpriv;
 115     /* True if v8.3-PAuth is active.  */
 116     bool pauth_active;
 117     /* True if v8.5-MTE access to tags is enabled; index with is_unpriv.  */
 118     bool ata[2];
 119     /* True if v8.5-MTE tag checks affect the PE; index with is_unpriv.  */
 120     bool mte_active[2];
 121     /* True with v8.5-BTI and SCTLR_ELx.BT* set.  */
 122     bool bt;
 123     /* True if any CP15 access is trapped by HSTR_EL2 */
 124     bool hstr_active;
 125     /* True if memory operations require alignment */
 126     bool align_mem;
 127     /* True if PSTATE.IL is set */
 128     bool pstate_il;
 129     /* True if PSTATE.SM is set. */
 130     bool pstate_sm;
 131     /* True if PSTATE.ZA is set. */
 132     bool pstate_za;
 133     /* True if non-streaming insns should raise an SME Streaming exception. */
 134     bool sme_trap_nonstreaming;
 135     /* True if the current instruction is non-streaming. */
 136     bool is_nonstreaming;
 137     /* True if MVE insns are definitely not predicated by VPR or LTPSIZE */
 138     bool mve_no_pred;
 139     /* True if fine-grained traps are active */
 140     bool fgt_active;
 141     /* True if fine-grained trap on SVC is enabled */
 142     bool fgt_svc;
 143     /* True if a trap on ERET is enabled (FGT or NV) */
 144     bool trap_eret;
 145     /* True if FEAT_LSE2 SCTLR_ELx.nAA is set */
 146     bool naa;
 147     /* True if FEAT_NV HCR_EL2.NV is enabled */
 148     bool nv;
 149     /* True if NV enabled and HCR_EL2.NV1 is set */
 150     bool nv1;
 151     /* True if NV enabled and HCR_EL2.NV2 is set */
 152     bool nv2;
 153     /* True if NV2 enabled and NV2 RAM accesses use EL2&0 translation regime */
 154     bool nv2_mem_e20;
 155     /* True if NV2 enabled and NV2 RAM accesses are big-endian */
 156     bool nv2_mem_be;
 157     /*
 158      * >= 0, a copy of PSTATE.BTYPE, which will be 0 without v8.5-BTI.
 159      *  < 0, set by the current instruction.
 160      */
 161     int8_t btype;
 162     /* A copy of cpu->dcz_blocksize. */
 163     uint8_t dcz_blocksize;
 164     /* A copy of cpu->gm_blocksize. */
 165     uint8_t gm_blocksize;
 166     /* True if the current insn_start has been updated. */
 167     bool insn_start_updated;
 168     /* True if this is the AArch32 Secure PL1&0 translation regime */
 169     bool s_pl1_0;
 170     /* Bottom two bits of XScale c15_cpar coprocessor access control reg */
 171     int c15_cpar;
 172     /* Offset from VNCR_EL2 when FEAT_NV2 redirects this reg to memory */
 173     uint32_t nv2_redirect_offset;
 174 } DisasContext;
 175
 176 typedef struct DisasCompare {
 177     TCGCond cond;
 178     TCGv_i32 value;
 179 } DisasCompare;
 180
 181 /* Share the TCG temporaries common between 32 and 64 bit modes.  */
 182 extern TCGv_i32 cpu_NF, cpu_ZF, cpu_CF, cpu_VF;
 183 extern TCGv_i64 cpu_exclusive_addr;
 184 extern TCGv_i64 cpu_exclusive_val;
 185
 186 /*
 187  * Constant expanders for the decoders.
 188  */
 189
 190 static inline int negate(DisasContext *s, int x)
 191 {
 192     return -x;
 193 }
 194
 195 static inline int plus_1(DisasContext *s, int x)
 196 {
 197     return x + 1;
 198 }
 199
 200 static inline int plus_2(DisasContext *s, int x)
 201 {
 202     return x + 2;
 203 }
 204
 205 static inline int plus_12(DisasContext *s, int x)
 206 {
 207     return x + 12;
 208 }
 209
 210 static inline int times_2(DisasContext *s, int x)
 211 {
 212     return x * 2;
 213 }
 214
 215 static inline int times_4(DisasContext *s, int x)
 216 {
 217     return x * 4;
 218 }
 219
 220 static inline int times_8(DisasContext *s, int x)
 221 {
 222     return x * 8;
 223 }
 224
 225 static inline int times_2_plus_1(DisasContext *s, int x)
 226 {
 227     return x * 2 + 1;
 228 }
 229
 230 static inline int rsub_64(DisasContext *s, int x)
 231 {
 232     return 64 - x;
 233 }
 234
 235 static inline int rsub_32(DisasContext *s, int x)
 236 {
 237     return 32 - x;
 238 }
 239
 240 static inline int rsub_16(DisasContext *s, int x)
 241 {
 242     return 16 - x;
 243 }
 244
 245 static inline int rsub_8(DisasContext *s, int x)
 246 {
 247     return 8 - x;
 248 }
 249
 250 static inline int shl_12(DisasContext *s, int x)
 251 {
 252     return x << 12;
 253 }
 254
 255 static inline int xor_2(DisasContext *s, int x)
 256 {
 257     return x ^ 2;
 258 }
 259
 260 static inline int neon_3same_fp_size(DisasContext *s, int x)
 261 {
 262     /* Convert 0==fp32, 1==fp16 into a MO_* value */
 263     return MO_32 - x;
 264 }
 265
 266 static inline int arm_dc_feature(DisasContext *dc, int feature)
 267 {
 268     return (dc->features & (1ULL << feature)) != 0;
 269 }
 270
 271 static inline int get_mem_index(DisasContext *s)
 272 {
 273     return arm_to_core_mmu_idx(s->mmu_idx);
 274 }
 275
 276 static inline void disas_set_insn_syndrome(DisasContext *s, uint32_t syn)
 277 {
 278     /* We don't need to save all of the syndrome so we mask and shift
 279      * out unneeded bits to help the sleb128 encoder do a better job.
 280      */
 281     syn &= ARM_INSN_START_WORD2_MASK;
 282     syn >>= ARM_INSN_START_WORD2_SHIFT;
 283
 284     /* Check for multiple updates.  */
 285     assert(!s->insn_start_updated);
 286     s->insn_start_updated = true;
 287     tcg_set_insn_start_param(s->base.insn_start, 2, syn);
 288 }
 289
 290 static inline int curr_insn_len(DisasContext *s)
 291 {
 292     return s->base.pc_next - s->pc_curr;
 293 }
 294
 295 /* is_jmp field values */
 296 #define DISAS_JUMP      DISAS_TARGET_0 /* only pc was modified dynamically */
 297 /* CPU state was modified dynamically; exit to main loop for interrupts. */
 298 #define DISAS_UPDATE_EXIT  DISAS_TARGET_1
 299 /* These instructions trap after executing, so the A32/T32 decoder must
 300  * defer them until after the conditional execution state has been updated.
 301  * WFI also needs special handling when single-stepping.
 302  */
 303 #define DISAS_WFI       DISAS_TARGET_2
 304 #define DISAS_SWI       DISAS_TARGET_3
 305 /* WFE */
 306 #define DISAS_WFE       DISAS_TARGET_4
 307 #define DISAS_HVC       DISAS_TARGET_5
 308 #define DISAS_SMC       DISAS_TARGET_6
 309 #define DISAS_YIELD     DISAS_TARGET_7
 310 /* M profile branch which might be an exception return (and so needs
 311  * custom end-of-TB code)
 312  */
 313 #define DISAS_BX_EXCRET DISAS_TARGET_8
 314 /*
 315  * For instructions which want an immediate exit to the main loop, as opposed
 316  * to attempting to use lookup_and_goto_ptr.  Unlike DISAS_UPDATE_EXIT, this
 317  * doesn't write the PC on exiting the translation loop so you need to ensure
 318  * something (gen_a64_update_pc or runtime helper) has done so before we reach
 319  * return from cpu_tb_exec.
 320  */
 321 #define DISAS_EXIT      DISAS_TARGET_9
 322 /* CPU state was modified dynamically; no need to exit, but do not chain. */
 323 #define DISAS_UPDATE_NOCHAIN  DISAS_TARGET_10
 324
 325 #ifdef TARGET_AARCH64
 326 void a64_translate_init(void);
 327 void gen_a64_update_pc(DisasContext *s, target_long diff);
 328 extern const TranslatorOps aarch64_translator_ops;
 329 #else
 330 static inline void a64_translate_init(void)
 331 {
 332 }
 333
 334 static inline void gen_a64_update_pc(DisasContext *s, target_long diff)
 335 {
 336 }
 337 #endif
 338
 339 void arm_test_cc(DisasCompare *cmp, int cc);
 340 void arm_jump_cc(DisasCompare *cmp, TCGLabel *label);
 341 void arm_gen_test_cc(int cc, TCGLabel *label);
 342 MemOp pow2_align(unsigned i);
 343 void unallocated_encoding(DisasContext *s);
 344 void gen_exception_insn_el(DisasContext *s, target_long pc_diff, int excp,
 345                            uint32_t syn, uint32_t target_el);
 346 void gen_exception_insn(DisasContext *s, target_long pc_diff,
 347                         int excp, uint32_t syn);
 348
 349 /* Return state of Alternate Half-precision flag, caller frees result */
 350 static inline TCGv_i32 get_ahp_flag(void)
 351 {
 352     TCGv_i32 ret = tcg_temp_new_i32();
 353
 354     tcg_gen_ld_i32(ret, tcg_env, offsetoflow32(CPUARMState, vfp.fpcr));
 355     tcg_gen_extract_i32(ret, ret, 26, 1);
 356
 357     return ret;
 358 }
 359
 360 /* Set bits within PSTATE.  */
 361 static inline void set_pstate_bits(uint32_t bits)
 362 {
 363     TCGv_i32 p = tcg_temp_new_i32();
 364
 365     tcg_debug_assert(!(bits & CACHED_PSTATE_BITS));
 366
 367     tcg_gen_ld_i32(p, tcg_env, offsetof(CPUARMState, pstate));
 368     tcg_gen_ori_i32(p, p, bits);
 369     tcg_gen_st_i32(p, tcg_env, offsetof(CPUARMState, pstate));
 370 }
 371
 372 /* Clear bits within PSTATE.  */
 373 static inline void clear_pstate_bits(uint32_t bits)
 374 {
 375     TCGv_i32 p = tcg_temp_new_i32();
 376
 377     tcg_debug_assert(!(bits & CACHED_PSTATE_BITS));
 378
 379     tcg_gen_ld_i32(p, tcg_env, offsetof(CPUARMState, pstate));
 380     tcg_gen_andi_i32(p, p, ~bits);
 381     tcg_gen_st_i32(p, tcg_env, offsetof(CPUARMState, pstate));
 382 }
 383
 384 /* If the singlestep state is Active-not-pending, advance to Active-pending. */
 385 static inline void gen_ss_advance(DisasContext *s)
 386 {
 387     if (s->ss_active) {
 388         s->pstate_ss = 0;
 389         clear_pstate_bits(PSTATE_SS);
 390     }
 391 }
 392
 393 /* Generate an architectural singlestep exception */
 394 static inline void gen_swstep_exception(DisasContext *s, int isv, int ex)
 395 {
 396     /* Fill in the same_el field of the syndrome in the helper. */
 397     uint32_t syn = syn_swstep(false, isv, ex);
 398     gen_helper_exception_swstep(tcg_env, tcg_constant_i32(syn));
 399 }
 400
 401 /*
 402  * Given a VFP floating point constant encoded into an 8 bit immediate in an
 403  * instruction, expand it to the actual constant value of the specified
 404  * size, as per the VFPExpandImm() pseudocode in the Arm ARM.
 405  */
 406 uint64_t vfp_expand_imm(int size, uint8_t imm8);
 407
 408 static inline void gen_vfp_absh(TCGv_i32 d, TCGv_i32 s)
 409 {
 410     tcg_gen_andi_i32(d, s, INT16_MAX);
 411 }
 412
 413 static inline void gen_vfp_abss(TCGv_i32 d, TCGv_i32 s)
 414 {
 415     tcg_gen_andi_i32(d, s, INT32_MAX);
 416 }
 417
 418 static inline void gen_vfp_absd(TCGv_i64 d, TCGv_i64 s)
 419 {
 420     tcg_gen_andi_i64(d, s, INT64_MAX);
 421 }
 422
 423 static inline void gen_vfp_negh(TCGv_i32 d, TCGv_i32 s)
 424 {
 425     tcg_gen_xori_i32(d, s, 1u << 15);
 426 }
 427
 428 static inline void gen_vfp_negs(TCGv_i32 d, TCGv_i32 s)
 429 {
 430     tcg_gen_xori_i32(d, s, 1u << 31);
 431 }
 432
 433 static inline void gen_vfp_negd(TCGv_i64 d, TCGv_i64 s)
 434 {
 435     tcg_gen_xori_i64(d, s, 1ull << 63);
 436 }
 437
 438 /* Vector operations shared between ARM and AArch64.  */
 439 void gen_gvec_ceq0(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs,
 440                    uint32_t opr_sz, uint32_t max_sz);
 441 void gen_gvec_clt0(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs,
 442                    uint32_t opr_sz, uint32_t max_sz);
 443 void gen_gvec_cgt0(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs,
 444                    uint32_t opr_sz, uint32_t max_sz);
 445 void gen_gvec_cle0(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs,
 446                    uint32_t opr_sz, uint32_t max_sz);
 447 void gen_gvec_cge0(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs,
 448                    uint32_t opr_sz, uint32_t max_sz);
 449
 450 void gen_gvec_mla(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
 451                   uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
 452 void gen_gvec_mls(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
 453                   uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
 454
 455 void gen_gvec_cmtst(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
 456                     uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
 457 void gen_gvec_sshl(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
 458                    uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
 459 void gen_gvec_ushl(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
 460                    uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
 461 void gen_gvec_srshl(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
 462                     uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
 463 void gen_gvec_urshl(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
 464                     uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
 465 void gen_neon_sqshl(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
 466                     uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
 467 void gen_neon_uqshl(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
 468                     uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
 469 void gen_neon_sqrshl(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
 470                      uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
 471 void gen_neon_uqrshl(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
 472                      uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
 473
 474 void gen_neon_sqshli(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
 475                      int64_t c, uint32_t opr_sz, uint32_t max_sz);
 476 void gen_neon_uqshli(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
 477                      int64_t c, uint32_t opr_sz, uint32_t max_sz);
 478 void gen_neon_sqshlui(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
 479                       int64_t c, uint32_t opr_sz, uint32_t max_sz);
 480
 481 void gen_gvec_shadd(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
 482                     uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
 483 void gen_gvec_uhadd(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
 484                     uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
 485 void gen_gvec_shsub(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
 486                     uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
 487 void gen_gvec_uhsub(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
 488                     uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
 489 void gen_gvec_srhadd(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
 490                      uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
 491 void gen_gvec_urhadd(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
 492                      uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
 493
 494 void gen_cmtst_i64(TCGv_i64 d, TCGv_i64 a, TCGv_i64 b);
 495 void gen_ushl_i32(TCGv_i32 d, TCGv_i32 a, TCGv_i32 b);
 496 void gen_sshl_i32(TCGv_i32 d, TCGv_i32 a, TCGv_i32 b);
 497 void gen_ushl_i64(TCGv_i64 d, TCGv_i64 a, TCGv_i64 b);
 498 void gen_sshl_i64(TCGv_i64 d, TCGv_i64 a, TCGv_i64 b);
 499
 500 void gen_uqadd_bhs(TCGv_i64 res, TCGv_i64 qc,
 501                    TCGv_i64 a, TCGv_i64 b, MemOp esz);
 502 void gen_uqadd_d(TCGv_i64 d, TCGv_i64 q, TCGv_i64 a, TCGv_i64 b);
 503 void gen_gvec_uqadd_qc(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
 504                        uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
 505
 506 void gen_sqadd_bhs(TCGv_i64 res, TCGv_i64 qc,
 507                    TCGv_i64 a, TCGv_i64 b, MemOp esz);
 508 void gen_sqadd_d(TCGv_i64 d, TCGv_i64 q, TCGv_i64 a, TCGv_i64 b);
 509 void gen_gvec_sqadd_qc(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
 510                        uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
 511
 512 void gen_uqsub_bhs(TCGv_i64 res, TCGv_i64 qc,
 513                    TCGv_i64 a, TCGv_i64 b, MemOp esz);
 514 void gen_uqsub_d(TCGv_i64 d, TCGv_i64 q, TCGv_i64 a, TCGv_i64 b);
 515 void gen_gvec_uqsub_qc(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
 516                        uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
 517
 518 void gen_sqsub_bhs(TCGv_i64 res, TCGv_i64 qc,
 519                    TCGv_i64 a, TCGv_i64 b, MemOp esz);
 520 void gen_sqsub_d(TCGv_i64 d, TCGv_i64 q, TCGv_i64 a, TCGv_i64 b);
 521 void gen_gvec_sqsub_qc(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
 522                        uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
 523
 524 void gen_gvec_sshr(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs,
 525                    int64_t shift, uint32_t opr_sz, uint32_t max_sz);
 526 void gen_gvec_ushr(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs,
 527                    int64_t shift, uint32_t opr_sz, uint32_t max_sz);
 528
 529 void gen_gvec_ssra(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs,
 530                    int64_t shift, uint32_t opr_sz, uint32_t max_sz);
 531 void gen_gvec_usra(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs,
 532                    int64_t shift, uint32_t opr_sz, uint32_t max_sz);
 533
 534 void gen_srshr32_i32(TCGv_i32 d, TCGv_i32 a, int32_t sh);
 535 void gen_srshr64_i64(TCGv_i64 d, TCGv_i64 a, int64_t sh);
 536 void gen_urshr32_i32(TCGv_i32 d, TCGv_i32 a, int32_t sh);
 537 void gen_urshr64_i64(TCGv_i64 d, TCGv_i64 a, int64_t sh);
 538
 539 void gen_gvec_srshr(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs,
 540                     int64_t shift, uint32_t opr_sz, uint32_t max_sz);
 541 void gen_gvec_urshr(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs,
 542                     int64_t shift, uint32_t opr_sz, uint32_t max_sz);
 543 void gen_gvec_srsra(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs,
 544                     int64_t shift, uint32_t opr_sz, uint32_t max_sz);
 545 void gen_gvec_ursra(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs,
 546                     int64_t shift, uint32_t opr_sz, uint32_t max_sz);
 547
 548 void gen_gvec_sri(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs,
 549                   int64_t shift, uint32_t opr_sz, uint32_t max_sz);
 550 void gen_gvec_sli(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs,
 551                   int64_t shift, uint32_t opr_sz, uint32_t max_sz);
 552
 553 void gen_gvec_sqdmulh_qc(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
 554                          uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
 555 void gen_gvec_sqrdmulh_qc(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
 556                           uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
 557 void gen_gvec_sqrdmlah_qc(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
 558                           uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
 559 void gen_gvec_sqrdmlsh_qc(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
 560                           uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
 561
 562 void gen_gvec_sabd(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
 563                    uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
 564 void gen_gvec_uabd(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
 565                    uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
 566
 567 void gen_gvec_saba(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
 568                    uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
 569 void gen_gvec_uaba(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
 570                    uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
 571
 572 void gen_gvec_addp(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
 573                    uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
 574 void gen_gvec_smaxp(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
 575                     uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
 576 void gen_gvec_sminp(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
 577                     uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
 578 void gen_gvec_umaxp(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
 579                     uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
 580 void gen_gvec_uminp(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
 581                     uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
 582
 583 /*
 584  * Forward to the isar_feature_* tests given a DisasContext pointer.
 585  */
 586 #define dc_isar_feature(name, ctx) \
 587     ({ DisasContext *ctx_ = (ctx); isar_feature_##name(ctx_->isar); })
 588
 589 /* Note that the gvec expanders operate on offsets + sizes.  */
 590 typedef void GVecGen2Fn(unsigned, uint32_t, uint32_t, uint32_t, uint32_t);
 591 typedef void GVecGen2iFn(unsigned, uint32_t, uint32_t, int64_t,
 592                          uint32_t, uint32_t);
 593 typedef void GVecGen3Fn(unsigned, uint32_t, uint32_t,
 594                         uint32_t, uint32_t, uint32_t);
 595 typedef void GVecGen4Fn(unsigned, uint32_t, uint32_t, uint32_t,
 596                         uint32_t, uint32_t, uint32_t);
 597
 598 /* Function prototype for gen_ functions for calling Neon helpers */
 599 typedef void NeonGenOneOpFn(TCGv_i32, TCGv_i32);
 600 typedef void NeonGenOneOpEnvFn(TCGv_i32, TCGv_ptr, TCGv_i32);
 601 typedef void NeonGenTwoOpFn(TCGv_i32, TCGv_i32, TCGv_i32);
 602 typedef void NeonGenTwoOpEnvFn(TCGv_i32, TCGv_ptr, TCGv_i32, TCGv_i32);
 603 typedef void NeonGenThreeOpEnvFn(TCGv_i32, TCGv_env, TCGv_i32,
 604                                  TCGv_i32, TCGv_i32);
 605 typedef void NeonGenTwo64OpFn(TCGv_i64, TCGv_i64, TCGv_i64);
 606 typedef void NeonGenTwo64OpEnvFn(TCGv_i64, TCGv_ptr, TCGv_i64, TCGv_i64);
 607 typedef void NeonGenNarrowFn(TCGv_i32, TCGv_i64);
 608 typedef void NeonGenWidenFn(TCGv_i64, TCGv_i32);
 609 typedef void NeonGenTwoOpWidenFn(TCGv_i64, TCGv_i32, TCGv_i32);
 610 typedef void NeonGenOneSingleOpFn(TCGv_i32, TCGv_i32, TCGv_ptr);
 611 typedef void NeonGenTwoSingleOpFn(TCGv_i32, TCGv_i32, TCGv_i32, TCGv_ptr);
 612 typedef void NeonGenTwoDoubleOpFn(TCGv_i64, TCGv_i64, TCGv_i64, TCGv_ptr);
 613 typedef void NeonGenOne64OpFn(TCGv_i64, TCGv_i64);
 614 typedef void NeonGenOne64OpEnvFn(TCGv_i64, TCGv_env, TCGv_i64);
 615 typedef void CryptoTwoOpFn(TCGv_ptr, TCGv_ptr);
 616 typedef void CryptoThreeOpIntFn(TCGv_ptr, TCGv_ptr, TCGv_i32);
 617 typedef void CryptoThreeOpFn(TCGv_ptr, TCGv_ptr, TCGv_ptr);
 618 typedef void AtomicThreeOpFn(TCGv_i64, TCGv_i64, TCGv_i64, TCGArg, MemOp);
 619 typedef void WideShiftImmFn(TCGv_i64, TCGv_i64, int64_t shift);
 620 typedef void WideShiftFn(TCGv_i64, TCGv_ptr, TCGv_i64, TCGv_i32);
 621 typedef void ShiftImmFn(TCGv_i32, TCGv_i32, int32_t shift);
 622 typedef void ShiftFn(TCGv_i32, TCGv_ptr, TCGv_i32, TCGv_i32);
 623
 624 /**
 625  * arm_tbflags_from_tb:
 626  * @tb: the TranslationBlock
 627  *
 628  * Extract the flag values from @tb.
 629  */
 630 static inline CPUARMTBFlags arm_tbflags_from_tb(const TranslationBlock *tb)
 631 {
 632     return (CPUARMTBFlags){ tb->flags, tb->cs_base };
 633 }
 634
 635 /*
 636  * Enum for argument to fpstatus_ptr().
 637  */
 638 typedef enum ARMFPStatusFlavour {
 639     FPST_FPCR,
 640     FPST_FPCR_F16,
 641     FPST_STD,
 642     FPST_STD_F16,
 643 } ARMFPStatusFlavour;
 644
 645 /**
 646  * fpstatus_ptr: return TCGv_ptr to the specified fp_status field
 647  *
 648  * We have multiple softfloat float_status fields in the Arm CPU state struct
 649  * (see the comment in cpu.h for details). Return a TCGv_ptr which has
 650  * been set up to point to the requested field in the CPU state struct.
 651  * The options are:
 652  *
 653  * FPST_FPCR
 654  *   for non-FP16 operations controlled by the FPCR
 655  * FPST_FPCR_F16
 656  *   for operations controlled by the FPCR where FPCR.FZ16 is to be used
 657  * FPST_STD
 658  *   for A32/T32 Neon operations using the "standard FPSCR value"
 659  * FPST_STD_F16
 660  *   as FPST_STD, but where FPCR.FZ16 is to be used
 661  */
 662 static inline TCGv_ptr fpstatus_ptr(ARMFPStatusFlavour flavour)
 663 {
 664     TCGv_ptr statusptr = tcg_temp_new_ptr();
 665     int offset;
 666
 667     switch (flavour) {
 668     case FPST_FPCR:
 669         offset = offsetof(CPUARMState, vfp.fp_status);
 670         break;
 671     case FPST_FPCR_F16:
 672         offset = offsetof(CPUARMState, vfp.fp_status_f16);
 673         break;
 674     case FPST_STD:
 675         offset = offsetof(CPUARMState, vfp.standard_fp_status);
 676         break;
 677     case FPST_STD_F16:
 678         offset = offsetof(CPUARMState, vfp.standard_fp_status_f16);
 679         break;
 680     default:
 681         g_assert_not_reached();
 682     }
 683     tcg_gen_addi_ptr(statusptr, tcg_env, offset);
 684     return statusptr;
 685 }
 686
 687 /**
 688  * finalize_memop_atom:
 689  * @s: DisasContext
 690  * @opc: size+sign+align of the memory operation
 691  * @atom: atomicity of the memory operation
 692  *
 693  * Build the complete MemOp for a memory operation, including alignment,
 694  * endianness, and atomicity.
 695  *
 696  * If (op & MO_AMASK) then the operation already contains the required
 697  * alignment, e.g. for AccType_ATOMIC.  Otherwise, this an optionally
 698  * unaligned operation, e.g. for AccType_NORMAL.
 699  *
 700  * In the latter case, there are configuration bits that require alignment,
 701  * and this is applied here.  Note that there is no way to indicate that
 702  * no alignment should ever be enforced; this must be handled manually.
 703  */
 704 static inline MemOp finalize_memop_atom(DisasContext *s, MemOp opc, MemOp atom)
 705 {
 706     if (s->align_mem && !(opc & MO_AMASK)) {
 707         opc |= MO_ALIGN;
 708     }
 709     return opc | atom | s->be_data;
 710 }
 711
 712 /**
 713  * finalize_memop:
 714  * @s: DisasContext
 715  * @opc: size+sign+align of the memory operation
 716  *
 717  * Like finalize_memop_atom, but with default atomicity.
 718  */
 719 static inline MemOp finalize_memop(DisasContext *s, MemOp opc)
 720 {
 721     MemOp atom = s->lse2 ? MO_ATOM_WITHIN16 : MO_ATOM_IFALIGN;
 722     return finalize_memop_atom(s, opc, atom);
 723 }
 724
 725 /**
 726  * finalize_memop_pair:
 727  * @s: DisasContext
 728  * @opc: size+sign+align of the memory operation
 729  *
 730  * Like finalize_memop_atom, but with atomicity for a pair.
 731  * C.f. Pseudocode for Mem[], operand ispair.
 732  */
 733 static inline MemOp finalize_memop_pair(DisasContext *s, MemOp opc)
 734 {
 735     MemOp atom = s->lse2 ? MO_ATOM_WITHIN16_PAIR : MO_ATOM_IFALIGN_PAIR;
 736     return finalize_memop_atom(s, opc, atom);
 737 }
 738
 739 /**
 740  * finalize_memop_asimd:
 741  * @s: DisasContext
 742  * @opc: size+sign+align of the memory operation
 743  *
 744  * Like finalize_memop_atom, but with atomicity of AccessType_ASIMD.
 745  */
 746 static inline MemOp finalize_memop_asimd(DisasContext *s, MemOp opc)
 747 {
 748     /*
 749      * In the pseudocode for Mem[], with AccessType_ASIMD, size == 16,
 750      * if IsAligned(8), the first case provides separate atomicity for
 751      * the pair of 64-bit accesses.  If !IsAligned(8), the middle cases
 752      * do not apply, and we're left with the final case of no atomicity.
 753      * Thus MO_ATOM_IFALIGN_PAIR.
 754      *
 755      * For other sizes, normal LSE2 rules apply.
 756      */
 757     if ((opc & MO_SIZE) == MO_128) {
 758         return finalize_memop_atom(s, opc, MO_ATOM_IFALIGN_PAIR);
 759     }
 760     return finalize_memop(s, opc);
 761 }
 762
 763 /**
 764  * asimd_imm_const: Expand an encoded SIMD constant value
 765  *
 766  * Expand a SIMD constant value. This is essentially the pseudocode
 767  * AdvSIMDExpandImm, except that we also perform the boolean NOT needed for
 768  * VMVN and VBIC (when cmode < 14 && op == 1).
 769  *
 770  * The combination cmode == 15 op == 1 is a reserved encoding for AArch32;
 771  * callers must catch this; we return the 64-bit constant value defined
 772  * for AArch64.
 773  *
 774  * cmode = 2,3,4,5,6,7,10,11,12,13 imm=0 was UNPREDICTABLE in v7A but
 775  * is either not unpredictable or merely CONSTRAINED UNPREDICTABLE in v8A;
 776  * we produce an immediate constant value of 0 in these cases.
 777  */
 778 uint64_t asimd_imm_const(uint32_t imm, int cmode, int op);
 779
 780 /*
 781  * gen_disas_label:
 782  * Create a label and cache a copy of pc_save.
 783  */
 784 static inline DisasLabel gen_disas_label(DisasContext *s)
 785 {
 786     return (DisasLabel){
 787         .label = gen_new_label(),
 788         .pc_save = s->pc_save,
 789     };
 790 }
 791
 792 /*
 793  * set_disas_label:
 794  * Emit a label and restore the cached copy of pc_save.
 795  */
 796 static inline void set_disas_label(DisasContext *s, DisasLabel l)
 797 {
 798     gen_set_label(l.label);
 799     s->pc_save = l.pc_save;
 800 }
 801
 802 static inline TCGv_ptr gen_lookup_cp_reg(uint32_t key)
 803 {
 804     TCGv_ptr ret = tcg_temp_new_ptr();
 805     gen_helper_lookup_cp_reg(ret, tcg_env, tcg_constant_i32(key));
 806     return ret;
 807 }
 808
 809 /*
 810  * Set and reset rounding mode around another operation.
 811  */
 812 static inline TCGv_i32 gen_set_rmode(ARMFPRounding rmode, TCGv_ptr fpst)
 813 {
 814     TCGv_i32 new = tcg_constant_i32(arm_rmode_to_sf(rmode));
 815     TCGv_i32 old = tcg_temp_new_i32();
 816
 817     gen_helper_set_rmode(old, new, fpst);
 818     return old;
 819 }
 820
 821 static inline void gen_restore_rmode(TCGv_i32 old, TCGv_ptr fpst)
 822 {
 823     gen_helper_set_rmode(old, old, fpst);
 824 }
 825
 826 /*
 827  * Helpers for implementing sets of trans_* functions.
 828  * Defer the implementation of NAME to FUNC, with optional extra arguments.
 829  */
 830 #define TRANS(NAME, FUNC, ...) \
 831     static bool trans_##NAME(DisasContext *s, arg_##NAME *a) \
 832     { return FUNC(s, __VA_ARGS__); }
 833 #define TRANS_FEAT(NAME, FEAT, FUNC, ...) \
 834     static bool trans_##NAME(DisasContext *s, arg_##NAME *a) \
 835     { return dc_isar_feature(FEAT, s) && FUNC(s, __VA_ARGS__); }
 836
 837 #define TRANS_FEAT_NONSTREAMING(NAME, FEAT, FUNC, ...)            \
 838     static bool trans_##NAME(DisasContext *s, arg_##NAME *a)      \
 839     {                                                             \
 840         s->is_nonstreaming = true;                                \
 841         return dc_isar_feature(FEAT, s) && FUNC(s, __VA_ARGS__);  \
 842     }
 843
 844 #endif /* TARGET_ARM_TRANSLATE_H */