diff options
Diffstat (limited to 'target/arm/tcg/translate.h')
| -rw-r--r-- | target/arm/tcg/translate.h | 644 |
1 files changed, 644 insertions, 0 deletions
diff --git a/target/arm/tcg/translate.h b/target/arm/tcg/translate.h new file mode 100644 index 0000000000..3717824b75 --- /dev/null +++ b/target/arm/tcg/translate.h @@ -0,0 +1,644 @@ +#ifndef TARGET_ARM_TRANSLATE_H +#define TARGET_ARM_TRANSLATE_H + +#include "exec/translator.h" +#include "internals.h" + + +/* internal defines */ + +/* + * Save pc_save across a branch, so that we may restore the value from + * before the branch at the point the label is emitted. + */ +typedef struct DisasLabel { + TCGLabel *label; + target_ulong pc_save; +} DisasLabel; + +typedef struct DisasContext { + DisasContextBase base; + const ARMISARegisters *isar; + + /* The address of the current instruction being translated. */ + target_ulong pc_curr; + /* + * For TARGET_TB_PCREL, the full value of cpu_pc is not known + * (although the page offset is known). For convenience, the + * translation loop uses the full virtual address that triggered + * the translation, from base.pc_start through pc_curr. + * For efficiency, we do not update cpu_pc for every instruction. + * Instead, pc_save has the value of pc_curr at the time of the + * last update to cpu_pc, which allows us to compute the addend + * needed to bring cpu_pc current: pc_curr - pc_save. + * If cpu_pc now contains the destination of an indirect branch, + * pc_save contains -1 to indicate that relative updates are no + * longer possible. + */ + target_ulong pc_save; + target_ulong page_start; + uint32_t insn; + /* Nonzero if this instruction has been conditionally skipped. */ + int condjmp; + /* The label that will be jumped to when the instruction is skipped. */ + DisasLabel condlabel; + /* Thumb-2 conditional execution bits. */ + int condexec_mask; + int condexec_cond; + /* M-profile ECI/ICI exception-continuable instruction state */ + int eci; + /* + * trans_ functions for insns which are continuable should set this true + * after decode (ie after any UNDEF checks) + */ + bool eci_handled; + int sctlr_b; + MemOp be_data; +#if !defined(CONFIG_USER_ONLY) + int user; +#endif + ARMMMUIdx mmu_idx; /* MMU index to use for normal loads/stores */ + uint8_t tbii; /* TBI1|TBI0 for insns */ + uint8_t tbid; /* TBI1|TBI0 for data */ + uint8_t tcma; /* TCMA1|TCMA0 for MTE */ + bool ns; /* Use non-secure CPREG bank on access */ + int fp_excp_el; /* FP exception EL or 0 if enabled */ + int sve_excp_el; /* SVE exception EL or 0 if enabled */ + int sme_excp_el; /* SME exception EL or 0 if enabled */ + int vl; /* current vector length in bytes */ + int svl; /* current streaming vector length in bytes */ + bool vfp_enabled; /* FP enabled via FPSCR.EN */ + int vec_len; + int vec_stride; + bool v7m_handler_mode; + bool v8m_secure; /* true if v8M and we're in Secure mode */ + bool v8m_stackcheck; /* true if we need to perform v8M stack limit checks */ + bool v8m_fpccr_s_wrong; /* true if v8M FPCCR.S != v8m_secure */ + bool v7m_new_fp_ctxt_needed; /* ASPEN set but no active FP context */ + bool v7m_lspact; /* FPCCR.LSPACT set */ + /* Immediate value in AArch32 SVC insn; must be set if is_jmp == DISAS_SWI + * so that top level loop can generate correct syndrome information. + */ + uint32_t svc_imm; + int current_el; + GHashTable *cp_regs; + uint64_t features; /* CPU features bits */ + bool aarch64; + bool thumb; + /* Because unallocated encodings generate different exception syndrome + * information from traps due to FP being disabled, we can't do a single + * "is fp access disabled" check at a high level in the decode tree. + * To help in catching bugs where the access check was forgotten in some + * code path, we set this flag when the access check is done, and assert + * that it is set at the point where we actually touch the FP regs. + */ + bool fp_access_checked; + bool sve_access_checked; + /* ARMv8 single-step state (this is distinct from the QEMU gdbstub + * single-step support). + */ + bool ss_active; + bool pstate_ss; + /* True if the insn just emitted was a load-exclusive instruction + * (necessary for syndrome information for single step exceptions), + * ie A64 LDX*, LDAX*, A32/T32 LDREX*, LDAEX*. + */ + bool is_ldex; + /* True if AccType_UNPRIV should be used for LDTR et al */ + bool unpriv; + /* True if v8.3-PAuth is active. */ + bool pauth_active; + /* True if v8.5-MTE access to tags is enabled. */ + bool ata; + /* True if v8.5-MTE tag checks affect the PE; index with is_unpriv. */ + bool mte_active[2]; + /* True with v8.5-BTI and SCTLR_ELx.BT* set. */ + bool bt; + /* True if any CP15 access is trapped by HSTR_EL2 */ + bool hstr_active; + /* True if memory operations require alignment */ + bool align_mem; + /* True if PSTATE.IL is set */ + bool pstate_il; + /* True if PSTATE.SM is set. */ + bool pstate_sm; + /* True if PSTATE.ZA is set. */ + bool pstate_za; + /* True if non-streaming insns should raise an SME Streaming exception. */ + bool sme_trap_nonstreaming; + /* True if the current instruction is non-streaming. */ + bool is_nonstreaming; + /* True if MVE insns are definitely not predicated by VPR or LTPSIZE */ + bool mve_no_pred; + /* True if fine-grained traps are active */ + bool fgt_active; + /* True if fine-grained trap on ERET is enabled */ + bool fgt_eret; + /* True if fine-grained trap on SVC is enabled */ + bool fgt_svc; + /* + * >= 0, a copy of PSTATE.BTYPE, which will be 0 without v8.5-BTI. + * < 0, set by the current instruction. + */ + int8_t btype; + /* A copy of cpu->dcz_blocksize. */ + uint8_t dcz_blocksize; + /* True if this page is guarded. */ + bool guarded_page; + /* Bottom two bits of XScale c15_cpar coprocessor access control reg */ + int c15_cpar; + /* TCG op of the current insn_start. */ + TCGOp *insn_start; +#define TMP_A64_MAX 16 + int tmp_a64_count; + TCGv_i64 tmp_a64[TMP_A64_MAX]; +} DisasContext; + +typedef struct DisasCompare { + TCGCond cond; + TCGv_i32 value; + bool value_global; +} DisasCompare; + +/* Share the TCG temporaries common between 32 and 64 bit modes. */ +extern TCGv_i32 cpu_NF, cpu_ZF, cpu_CF, cpu_VF; +extern TCGv_i64 cpu_exclusive_addr; +extern TCGv_i64 cpu_exclusive_val; + +/* + * Constant expanders for the decoders. + */ + +static inline int negate(DisasContext *s, int x) +{ + return -x; +} + +static inline int plus_1(DisasContext *s, int x) +{ + return x + 1; +} + +static inline int plus_2(DisasContext *s, int x) +{ + return x + 2; +} + +static inline int plus_12(DisasContext *s, int x) +{ + return x + 12; +} + +static inline int times_2(DisasContext *s, int x) +{ + return x * 2; +} + +static inline int times_4(DisasContext *s, int x) +{ + return x * 4; +} + +static inline int times_2_plus_1(DisasContext *s, int x) +{ + return x * 2 + 1; +} + +static inline int rsub_64(DisasContext *s, int x) +{ + return 64 - x; +} + +static inline int rsub_32(DisasContext *s, int x) +{ + return 32 - x; +} + +static inline int rsub_16(DisasContext *s, int x) +{ + return 16 - x; +} + +static inline int rsub_8(DisasContext *s, int x) +{ + return 8 - x; +} + +static inline int neon_3same_fp_size(DisasContext *s, int x) +{ + /* Convert 0==fp32, 1==fp16 into a MO_* value */ + return MO_32 - x; +} + +static inline int arm_dc_feature(DisasContext *dc, int feature) +{ + return (dc->features & (1ULL << feature)) != 0; +} + +static inline int get_mem_index(DisasContext *s) +{ + return arm_to_core_mmu_idx(s->mmu_idx); +} + +static inline void disas_set_insn_syndrome(DisasContext *s, uint32_t syn) +{ + /* We don't need to save all of the syndrome so we mask and shift + * out unneeded bits to help the sleb128 encoder do a better job. + */ + syn &= ARM_INSN_START_WORD2_MASK; + syn >>= ARM_INSN_START_WORD2_SHIFT; + + /* We check and clear insn_start_idx to catch multiple updates. */ + assert(s->insn_start != NULL); + tcg_set_insn_start_param(s->insn_start, 2, syn); + s->insn_start = NULL; +} + +static inline int curr_insn_len(DisasContext *s) +{ + return s->base.pc_next - s->pc_curr; +} + +/* is_jmp field values */ +#define DISAS_JUMP DISAS_TARGET_0 /* only pc was modified dynamically */ +/* CPU state was modified dynamically; exit to main loop for interrupts. */ +#define DISAS_UPDATE_EXIT DISAS_TARGET_1 +/* These instructions trap after executing, so the A32/T32 decoder must + * defer them until after the conditional execution state has been updated. + * WFI also needs special handling when single-stepping. + */ +#define DISAS_WFI DISAS_TARGET_2 +#define DISAS_SWI DISAS_TARGET_3 +/* WFE */ +#define DISAS_WFE DISAS_TARGET_4 +#define DISAS_HVC DISAS_TARGET_5 +#define DISAS_SMC DISAS_TARGET_6 +#define DISAS_YIELD DISAS_TARGET_7 +/* M profile branch which might be an exception return (and so needs + * custom end-of-TB code) + */ +#define DISAS_BX_EXCRET DISAS_TARGET_8 +/* + * For instructions which want an immediate exit to the main loop, as opposed + * to attempting to use lookup_and_goto_ptr. Unlike DISAS_UPDATE_EXIT, this + * doesn't write the PC on exiting the translation loop so you need to ensure + * something (gen_a64_update_pc or runtime helper) has done so before we reach + * return from cpu_tb_exec. + */ +#define DISAS_EXIT DISAS_TARGET_9 +/* CPU state was modified dynamically; no need to exit, but do not chain. */ +#define DISAS_UPDATE_NOCHAIN DISAS_TARGET_10 + +#ifdef TARGET_AARCH64 +void a64_translate_init(void); +void gen_a64_update_pc(DisasContext *s, target_long diff); +extern const TranslatorOps aarch64_translator_ops; +#else +static inline void a64_translate_init(void) +{ +} + +static inline void gen_a64_update_pc(DisasContext *s, target_long diff) +{ +} +#endif + +void arm_test_cc(DisasCompare *cmp, int cc); +void arm_free_cc(DisasCompare *cmp); +void arm_jump_cc(DisasCompare *cmp, TCGLabel *label); +void arm_gen_test_cc(int cc, TCGLabel *label); +MemOp pow2_align(unsigned i); +void unallocated_encoding(DisasContext *s); +void gen_exception_insn_el(DisasContext *s, target_long pc_diff, int excp, + uint32_t syn, uint32_t target_el); +void gen_exception_insn(DisasContext *s, target_long pc_diff, + int excp, uint32_t syn); + +/* Return state of Alternate Half-precision flag, caller frees result */ +static inline TCGv_i32 get_ahp_flag(void) +{ + TCGv_i32 ret = tcg_temp_new_i32(); + + tcg_gen_ld_i32(ret, cpu_env, + offsetof(CPUARMState, vfp.xregs[ARM_VFP_FPSCR])); + tcg_gen_extract_i32(ret, ret, 26, 1); + + return ret; +} + +/* Set bits within PSTATE. */ +static inline void set_pstate_bits(uint32_t bits) +{ + TCGv_i32 p = tcg_temp_new_i32(); + + tcg_debug_assert(!(bits & CACHED_PSTATE_BITS)); + + tcg_gen_ld_i32(p, cpu_env, offsetof(CPUARMState, pstate)); + tcg_gen_ori_i32(p, p, bits); + tcg_gen_st_i32(p, cpu_env, offsetof(CPUARMState, pstate)); + tcg_temp_free_i32(p); +} + +/* Clear bits within PSTATE. */ +static inline void clear_pstate_bits(uint32_t bits) +{ + TCGv_i32 p = tcg_temp_new_i32(); + + tcg_debug_assert(!(bits & CACHED_PSTATE_BITS)); + + tcg_gen_ld_i32(p, cpu_env, offsetof(CPUARMState, pstate)); + tcg_gen_andi_i32(p, p, ~bits); + tcg_gen_st_i32(p, cpu_env, offsetof(CPUARMState, pstate)); + tcg_temp_free_i32(p); +} + +/* If the singlestep state is Active-not-pending, advance to Active-pending. */ +static inline void gen_ss_advance(DisasContext *s) +{ + if (s->ss_active) { + s->pstate_ss = 0; + clear_pstate_bits(PSTATE_SS); + } +} + +/* Generate an architectural singlestep exception */ +static inline void gen_swstep_exception(DisasContext *s, int isv, int ex) +{ + /* Fill in the same_el field of the syndrome in the helper. */ + uint32_t syn = syn_swstep(false, isv, ex); + gen_helper_exception_swstep(cpu_env, tcg_constant_i32(syn)); +} + +/* + * Given a VFP floating point constant encoded into an 8 bit immediate in an + * instruction, expand it to the actual constant value of the specified + * size, as per the VFPExpandImm() pseudocode in the Arm ARM. + */ +uint64_t vfp_expand_imm(int size, uint8_t imm8); + +/* Vector operations shared between ARM and AArch64. */ +void gen_gvec_ceq0(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs, + uint32_t opr_sz, uint32_t max_sz); +void gen_gvec_clt0(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs, + uint32_t opr_sz, uint32_t max_sz); +void gen_gvec_cgt0(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs, + uint32_t opr_sz, uint32_t max_sz); +void gen_gvec_cle0(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs, + uint32_t opr_sz, uint32_t max_sz); +void gen_gvec_cge0(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs, + uint32_t opr_sz, uint32_t max_sz); + +void gen_gvec_mla(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs, + uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz); +void gen_gvec_mls(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs, + uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz); + +void gen_gvec_cmtst(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs, + uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz); +void gen_gvec_sshl(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs, + uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz); +void gen_gvec_ushl(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs, + uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz); + +void gen_cmtst_i64(TCGv_i64 d, TCGv_i64 a, TCGv_i64 b); +void gen_ushl_i32(TCGv_i32 d, TCGv_i32 a, TCGv_i32 b); +void gen_sshl_i32(TCGv_i32 d, TCGv_i32 a, TCGv_i32 b); +void gen_ushl_i64(TCGv_i64 d, TCGv_i64 a, TCGv_i64 b); +void gen_sshl_i64(TCGv_i64 d, TCGv_i64 a, TCGv_i64 b); + +void gen_gvec_uqadd_qc(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs, + uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz); +void gen_gvec_sqadd_qc(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs, + uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz); +void gen_gvec_uqsub_qc(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs, + uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz); +void gen_gvec_sqsub_qc(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs, + uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz); + +void gen_gvec_ssra(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs, + int64_t shift, uint32_t opr_sz, uint32_t max_sz); +void gen_gvec_usra(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs, + int64_t shift, uint32_t opr_sz, uint32_t max_sz); + +void gen_gvec_srshr(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs, + int64_t shift, uint32_t opr_sz, uint32_t max_sz); +void gen_gvec_urshr(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs, + int64_t shift, uint32_t opr_sz, uint32_t max_sz); +void gen_gvec_srsra(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs, + int64_t shift, uint32_t opr_sz, uint32_t max_sz); +void gen_gvec_ursra(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs, + int64_t shift, uint32_t opr_sz, uint32_t max_sz); + +void gen_gvec_sri(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs, + int64_t shift, uint32_t opr_sz, uint32_t max_sz); +void gen_gvec_sli(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs, + int64_t shift, uint32_t opr_sz, uint32_t max_sz); + +void gen_gvec_sqrdmlah_qc(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs, + uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz); +void gen_gvec_sqrdmlsh_qc(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs, + uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz); + +void gen_gvec_sabd(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs, + uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz); +void gen_gvec_uabd(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs, + uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz); + +void gen_gvec_saba(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs, + uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz); +void gen_gvec_uaba(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs, + uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz); + +/* + * Forward to the isar_feature_* tests given a DisasContext pointer. + */ +#define dc_isar_feature(name, ctx) \ + ({ DisasContext *ctx_ = (ctx); isar_feature_##name(ctx_->isar); }) + +/* Note that the gvec expanders operate on offsets + sizes. */ +typedef void GVecGen2Fn(unsigned, uint32_t, uint32_t, uint32_t, uint32_t); +typedef void GVecGen2iFn(unsigned, uint32_t, uint32_t, int64_t, + uint32_t, uint32_t); +typedef void GVecGen3Fn(unsigned, uint32_t, uint32_t, + uint32_t, uint32_t, uint32_t); +typedef void GVecGen4Fn(unsigned, uint32_t, uint32_t, uint32_t, + uint32_t, uint32_t, uint32_t); + +/* Function prototype for gen_ functions for calling Neon helpers */ +typedef void NeonGenOneOpFn(TCGv_i32, TCGv_i32); +typedef void NeonGenOneOpEnvFn(TCGv_i32, TCGv_ptr, TCGv_i32); +typedef void NeonGenTwoOpFn(TCGv_i32, TCGv_i32, TCGv_i32); +typedef void NeonGenTwoOpEnvFn(TCGv_i32, TCGv_ptr, TCGv_i32, TCGv_i32); +typedef void NeonGenThreeOpEnvFn(TCGv_i32, TCGv_env, TCGv_i32, + TCGv_i32, TCGv_i32); +typedef void NeonGenTwo64OpFn(TCGv_i64, TCGv_i64, TCGv_i64); +typedef void NeonGenTwo64OpEnvFn(TCGv_i64, TCGv_ptr, TCGv_i64, TCGv_i64); +typedef void NeonGenNarrowFn(TCGv_i32, TCGv_i64); +typedef void NeonGenNarrowEnvFn(TCGv_i32, TCGv_ptr, TCGv_i64); +typedef void NeonGenWidenFn(TCGv_i64, TCGv_i32); +typedef void NeonGenTwoOpWidenFn(TCGv_i64, TCGv_i32, TCGv_i32); +typedef void NeonGenOneSingleOpFn(TCGv_i32, TCGv_i32, TCGv_ptr); +typedef void NeonGenTwoSingleOpFn(TCGv_i32, TCGv_i32, TCGv_i32, TCGv_ptr); +typedef void NeonGenTwoDoubleOpFn(TCGv_i64, TCGv_i64, TCGv_i64, TCGv_ptr); +typedef void NeonGenOne64OpFn(TCGv_i64, TCGv_i64); +typedef void CryptoTwoOpFn(TCGv_ptr, TCGv_ptr); +typedef void CryptoThreeOpIntFn(TCGv_ptr, TCGv_ptr, TCGv_i32); +typedef void CryptoThreeOpFn(TCGv_ptr, TCGv_ptr, TCGv_ptr); +typedef void AtomicThreeOpFn(TCGv_i64, TCGv_i64, TCGv_i64, TCGArg, MemOp); +typedef void WideShiftImmFn(TCGv_i64, TCGv_i64, int64_t shift); +typedef void WideShiftFn(TCGv_i64, TCGv_ptr, TCGv_i64, TCGv_i32); +typedef void ShiftImmFn(TCGv_i32, TCGv_i32, int32_t shift); +typedef void ShiftFn(TCGv_i32, TCGv_ptr, TCGv_i32, TCGv_i32); + +/** + * arm_tbflags_from_tb: + * @tb: the TranslationBlock + * + * Extract the flag values from @tb. + */ +static inline CPUARMTBFlags arm_tbflags_from_tb(const TranslationBlock *tb) +{ + return (CPUARMTBFlags){ tb->flags, tb->cs_base }; +} + +/* + * Enum for argument to fpstatus_ptr(). + */ +typedef enum ARMFPStatusFlavour { + FPST_FPCR, + FPST_FPCR_F16, + FPST_STD, + FPST_STD_F16, +} ARMFPStatusFlavour; + +/** + * fpstatus_ptr: return TCGv_ptr to the specified fp_status field + * + * We have multiple softfloat float_status fields in the Arm CPU state struct + * (see the comment in cpu.h for details). Return a TCGv_ptr which has + * been set up to point to the requested field in the CPU state struct. + * The options are: + * + * FPST_FPCR + * for non-FP16 operations controlled by the FPCR + * FPST_FPCR_F16 + * for operations controlled by the FPCR where FPCR.FZ16 is to be used + * FPST_STD + * for A32/T32 Neon operations using the "standard FPSCR value" + * FPST_STD_F16 + * as FPST_STD, but where FPCR.FZ16 is to be used + */ +static inline TCGv_ptr fpstatus_ptr(ARMFPStatusFlavour flavour) +{ + TCGv_ptr statusptr = tcg_temp_new_ptr(); + int offset; + + switch (flavour) { + case FPST_FPCR: + offset = offsetof(CPUARMState, vfp.fp_status); + break; + case FPST_FPCR_F16: + offset = offsetof(CPUARMState, vfp.fp_status_f16); + break; + case FPST_STD: + offset = offsetof(CPUARMState, vfp.standard_fp_status); + break; + case FPST_STD_F16: + offset = offsetof(CPUARMState, vfp.standard_fp_status_f16); + break; + default: + g_assert_not_reached(); + } + tcg_gen_addi_ptr(statusptr, cpu_env, offset); + return statusptr; +} + +/** + * finalize_memop: + * @s: DisasContext + * @opc: size+sign+align of the memory operation + * + * Build the complete MemOp for a memory operation, including alignment + * and endianness. + * + * If (op & MO_AMASK) then the operation already contains the required + * alignment, e.g. for AccType_ATOMIC. Otherwise, this an optionally + * unaligned operation, e.g. for AccType_NORMAL. + * + * In the latter case, there are configuration bits that require alignment, + * and this is applied here. Note that there is no way to indicate that + * no alignment should ever be enforced; this must be handled manually. + */ +static inline MemOp finalize_memop(DisasContext *s, MemOp opc) +{ + if (s->align_mem && !(opc & MO_AMASK)) { + opc |= MO_ALIGN; + } + return opc | s->be_data; +} + +/** + * asimd_imm_const: Expand an encoded SIMD constant value + * + * Expand a SIMD constant value. This is essentially the pseudocode + * AdvSIMDExpandImm, except that we also perform the boolean NOT needed for + * VMVN and VBIC (when cmode < 14 && op == 1). + * + * The combination cmode == 15 op == 1 is a reserved encoding for AArch32; + * callers must catch this; we return the 64-bit constant value defined + * for AArch64. + * + * cmode = 2,3,4,5,6,7,10,11,12,13 imm=0 was UNPREDICTABLE in v7A but + * is either not unpredictable or merely CONSTRAINED UNPREDICTABLE in v8A; + * we produce an immediate constant value of 0 in these cases. + */ +uint64_t asimd_imm_const(uint32_t imm, int cmode, int op); + +/* + * gen_disas_label: + * Create a label and cache a copy of pc_save. + */ +static inline DisasLabel gen_disas_label(DisasContext *s) +{ + return (DisasLabel){ + .label = gen_new_label(), + .pc_save = s->pc_save, + }; +} + +/* + * set_disas_label: + * Emit a label and restore the cached copy of pc_save. + */ +static inline void set_disas_label(DisasContext *s, DisasLabel l) +{ + gen_set_label(l.label); + s->pc_save = l.pc_save; +} + +static inline TCGv_ptr gen_lookup_cp_reg(uint32_t key) +{ + TCGv_ptr ret = tcg_temp_new_ptr(); + gen_helper_lookup_cp_reg(ret, cpu_env, tcg_constant_i32(key)); + return ret; +} + +/* + * Helpers for implementing sets of trans_* functions. + * Defer the implementation of NAME to FUNC, with optional extra arguments. + */ +#define TRANS(NAME, FUNC, ...) \ + static bool trans_##NAME(DisasContext *s, arg_##NAME *a) \ + { return FUNC(s, __VA_ARGS__); } +#define TRANS_FEAT(NAME, FEAT, FUNC, ...) \ + static bool trans_##NAME(DisasContext *s, arg_##NAME *a) \ + { return dc_isar_feature(FEAT, s) && FUNC(s, __VA_ARGS__); } + +#define TRANS_FEAT_NONSTREAMING(NAME, FEAT, FUNC, ...) \ + static bool trans_##NAME(DisasContext *s, arg_##NAME *a) \ + { \ + s->is_nonstreaming = true; \ + return dc_isar_feature(FEAT, s) && FUNC(s, __VA_ARGS__); \ + } + +#endif /* TARGET_ARM_TRANSLATE_H */ |