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 this page is guarded. */
167 bool guarded_page;
168 /* True if the current insn_start has been updated. */
169 bool insn_start_updated;
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
negate(DisasContext * s,int x)190 static inline int negate(DisasContext *s, int x)
191 {
192 return -x;
193 }
194
plus_1(DisasContext * s,int x)195 static inline int plus_1(DisasContext *s, int x)
196 {
197 return x + 1;
198 }
199
plus_2(DisasContext * s,int x)200 static inline int plus_2(DisasContext *s, int x)
201 {
202 return x + 2;
203 }
204
plus_12(DisasContext * s,int x)205 static inline int plus_12(DisasContext *s, int x)
206 {
207 return x + 12;
208 }
209
times_2(DisasContext * s,int x)210 static inline int times_2(DisasContext *s, int x)
211 {
212 return x * 2;
213 }
214
times_4(DisasContext * s,int x)215 static inline int times_4(DisasContext *s, int x)
216 {
217 return x * 4;
218 }
219
times_8(DisasContext * s,int x)220 static inline int times_8(DisasContext *s, int x)
221 {
222 return x * 8;
223 }
224
times_2_plus_1(DisasContext * s,int x)225 static inline int times_2_plus_1(DisasContext *s, int x)
226 {
227 return x * 2 + 1;
228 }
229
rsub_64(DisasContext * s,int x)230 static inline int rsub_64(DisasContext *s, int x)
231 {
232 return 64 - x;
233 }
234
rsub_32(DisasContext * s,int x)235 static inline int rsub_32(DisasContext *s, int x)
236 {
237 return 32 - x;
238 }
239
rsub_16(DisasContext * s,int x)240 static inline int rsub_16(DisasContext *s, int x)
241 {
242 return 16 - x;
243 }
244
rsub_8(DisasContext * s,int x)245 static inline int rsub_8(DisasContext *s, int x)
246 {
247 return 8 - x;
248 }
249
shl_12(DisasContext * s,int x)250 static inline int shl_12(DisasContext *s, int x)
251 {
252 return x << 12;
253 }
254
neon_3same_fp_size(DisasContext * s,int x)255 static inline int neon_3same_fp_size(DisasContext *s, int x)
256 {
257 /* Convert 0==fp32, 1==fp16 into a MO_* value */
258 return MO_32 - x;
259 }
260
arm_dc_feature(DisasContext * dc,int feature)261 static inline int arm_dc_feature(DisasContext *dc, int feature)
262 {
263 return (dc->features & (1ULL << feature)) != 0;
264 }
265
get_mem_index(DisasContext * s)266 static inline int get_mem_index(DisasContext *s)
267 {
268 return arm_to_core_mmu_idx(s->mmu_idx);
269 }
270
disas_set_insn_syndrome(DisasContext * s,uint32_t syn)271 static inline void disas_set_insn_syndrome(DisasContext *s, uint32_t syn)
272 {
273 /* We don't need to save all of the syndrome so we mask and shift
274 * out unneeded bits to help the sleb128 encoder do a better job.
275 */
276 syn &= ARM_INSN_START_WORD2_MASK;
277 syn >>= ARM_INSN_START_WORD2_SHIFT;
278
279 /* Check for multiple updates. */
280 assert(!s->insn_start_updated);
281 s->insn_start_updated = true;
282 tcg_set_insn_start_param(s->base.insn_start, 2, syn);
283 }
284
curr_insn_len(DisasContext * s)285 static inline int curr_insn_len(DisasContext *s)
286 {
287 return s->base.pc_next - s->pc_curr;
288 }
289
290 /* is_jmp field values */
291 #define DISAS_JUMP DISAS_TARGET_0 /* only pc was modified dynamically */
292 /* CPU state was modified dynamically; exit to main loop for interrupts. */
293 #define DISAS_UPDATE_EXIT DISAS_TARGET_1
294 /* These instructions trap after executing, so the A32/T32 decoder must
295 * defer them until after the conditional execution state has been updated.
296 * WFI also needs special handling when single-stepping.
297 */
298 #define DISAS_WFI DISAS_TARGET_2
299 #define DISAS_SWI DISAS_TARGET_3
300 /* WFE */
301 #define DISAS_WFE DISAS_TARGET_4
302 #define DISAS_HVC DISAS_TARGET_5
303 #define DISAS_SMC DISAS_TARGET_6
304 #define DISAS_YIELD DISAS_TARGET_7
305 /* M profile branch which might be an exception return (and so needs
306 * custom end-of-TB code)
307 */
308 #define DISAS_BX_EXCRET DISAS_TARGET_8
309 /*
310 * For instructions which want an immediate exit to the main loop, as opposed
311 * to attempting to use lookup_and_goto_ptr. Unlike DISAS_UPDATE_EXIT, this
312 * doesn't write the PC on exiting the translation loop so you need to ensure
313 * something (gen_a64_update_pc or runtime helper) has done so before we reach
314 * return from cpu_tb_exec.
315 */
316 #define DISAS_EXIT DISAS_TARGET_9
317 /* CPU state was modified dynamically; no need to exit, but do not chain. */
318 #define DISAS_UPDATE_NOCHAIN DISAS_TARGET_10
319
320 #ifdef TARGET_AARCH64
321 void a64_translate_init(void);
322 void gen_a64_update_pc(DisasContext *s, target_long diff);
323 extern const TranslatorOps aarch64_translator_ops;
324 #else
a64_translate_init(void)325 static inline void a64_translate_init(void)
326 {
327 }
328
gen_a64_update_pc(DisasContext * s,target_long diff)329 static inline void gen_a64_update_pc(DisasContext *s, target_long diff)
330 {
331 }
332 #endif
333
334 void arm_test_cc(DisasCompare *cmp, int cc);
335 void arm_jump_cc(DisasCompare *cmp, TCGLabel *label);
336 void arm_gen_test_cc(int cc, TCGLabel *label);
337 MemOp pow2_align(unsigned i);
338 void unallocated_encoding(DisasContext *s);
339 void gen_exception_insn_el(DisasContext *s, target_long pc_diff, int excp,
340 uint32_t syn, uint32_t target_el);
341 void gen_exception_insn(DisasContext *s, target_long pc_diff,
342 int excp, uint32_t syn);
343
344 /* Return state of Alternate Half-precision flag, caller frees result */
get_ahp_flag(void)345 static inline TCGv_i32 get_ahp_flag(void)
346 {
347 TCGv_i32 ret = tcg_temp_new_i32();
348
349 tcg_gen_ld_i32(ret, tcg_env,
350 offsetof(CPUARMState, vfp.xregs[ARM_VFP_FPSCR]));
351 tcg_gen_extract_i32(ret, ret, 26, 1);
352
353 return ret;
354 }
355
356 /* Set bits within PSTATE. */
set_pstate_bits(uint32_t bits)357 static inline void set_pstate_bits(uint32_t bits)
358 {
359 TCGv_i32 p = tcg_temp_new_i32();
360
361 tcg_debug_assert(!(bits & CACHED_PSTATE_BITS));
362
363 tcg_gen_ld_i32(p, tcg_env, offsetof(CPUARMState, pstate));
364 tcg_gen_ori_i32(p, p, bits);
365 tcg_gen_st_i32(p, tcg_env, offsetof(CPUARMState, pstate));
366 }
367
368 /* Clear bits within PSTATE. */
clear_pstate_bits(uint32_t bits)369 static inline void clear_pstate_bits(uint32_t bits)
370 {
371 TCGv_i32 p = tcg_temp_new_i32();
372
373 tcg_debug_assert(!(bits & CACHED_PSTATE_BITS));
374
375 tcg_gen_ld_i32(p, tcg_env, offsetof(CPUARMState, pstate));
376 tcg_gen_andi_i32(p, p, ~bits);
377 tcg_gen_st_i32(p, tcg_env, offsetof(CPUARMState, pstate));
378 }
379
380 /* If the singlestep state is Active-not-pending, advance to Active-pending. */
gen_ss_advance(DisasContext * s)381 static inline void gen_ss_advance(DisasContext *s)
382 {
383 if (s->ss_active) {
384 s->pstate_ss = 0;
385 clear_pstate_bits(PSTATE_SS);
386 }
387 }
388
389 /* Generate an architectural singlestep exception */
gen_swstep_exception(DisasContext * s,int isv,int ex)390 static inline void gen_swstep_exception(DisasContext *s, int isv, int ex)
391 {
392 /* Fill in the same_el field of the syndrome in the helper. */
393 uint32_t syn = syn_swstep(false, isv, ex);
394 gen_helper_exception_swstep(tcg_env, tcg_constant_i32(syn));
395 }
396
397 /*
398 * Given a VFP floating point constant encoded into an 8 bit immediate in an
399 * instruction, expand it to the actual constant value of the specified
400 * size, as per the VFPExpandImm() pseudocode in the Arm ARM.
401 */
402 uint64_t vfp_expand_imm(int size, uint8_t imm8);
403
404 /* Vector operations shared between ARM and AArch64. */
405 void gen_gvec_ceq0(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs,
406 uint32_t opr_sz, uint32_t max_sz);
407 void gen_gvec_clt0(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs,
408 uint32_t opr_sz, uint32_t max_sz);
409 void gen_gvec_cgt0(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs,
410 uint32_t opr_sz, uint32_t max_sz);
411 void gen_gvec_cle0(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs,
412 uint32_t opr_sz, uint32_t max_sz);
413 void gen_gvec_cge0(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs,
414 uint32_t opr_sz, uint32_t max_sz);
415
416 void gen_gvec_mla(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
417 uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
418 void gen_gvec_mls(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
419 uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
420
421 void gen_gvec_cmtst(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
422 uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
423 void gen_gvec_sshl(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
424 uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
425 void gen_gvec_ushl(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
426 uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
427
428 void gen_cmtst_i64(TCGv_i64 d, TCGv_i64 a, TCGv_i64 b);
429 void gen_ushl_i32(TCGv_i32 d, TCGv_i32 a, TCGv_i32 b);
430 void gen_sshl_i32(TCGv_i32 d, TCGv_i32 a, TCGv_i32 b);
431 void gen_ushl_i64(TCGv_i64 d, TCGv_i64 a, TCGv_i64 b);
432 void gen_sshl_i64(TCGv_i64 d, TCGv_i64 a, TCGv_i64 b);
433
434 void gen_gvec_uqadd_qc(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
435 uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
436 void gen_gvec_sqadd_qc(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
437 uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
438 void gen_gvec_uqsub_qc(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
439 uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
440 void gen_gvec_sqsub_qc(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
441 uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
442
443 void gen_gvec_ssra(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs,
444 int64_t shift, uint32_t opr_sz, uint32_t max_sz);
445 void gen_gvec_usra(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs,
446 int64_t shift, uint32_t opr_sz, uint32_t max_sz);
447
448 void gen_gvec_srshr(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs,
449 int64_t shift, uint32_t opr_sz, uint32_t max_sz);
450 void gen_gvec_urshr(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs,
451 int64_t shift, uint32_t opr_sz, uint32_t max_sz);
452 void gen_gvec_srsra(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs,
453 int64_t shift, uint32_t opr_sz, uint32_t max_sz);
454 void gen_gvec_ursra(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs,
455 int64_t shift, uint32_t opr_sz, uint32_t max_sz);
456
457 void gen_gvec_sri(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs,
458 int64_t shift, uint32_t opr_sz, uint32_t max_sz);
459 void gen_gvec_sli(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs,
460 int64_t shift, uint32_t opr_sz, uint32_t max_sz);
461
462 void gen_gvec_sqrdmlah_qc(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
463 uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
464 void gen_gvec_sqrdmlsh_qc(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
465 uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
466
467 void gen_gvec_sabd(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_gvec_uabd(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
470 uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
471
472 void gen_gvec_saba(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
473 uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
474 void gen_gvec_uaba(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
475 uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
476
477 /*
478 * Forward to the isar_feature_* tests given a DisasContext pointer.
479 */
480 #define dc_isar_feature(name, ctx) \
481 ({ DisasContext *ctx_ = (ctx); isar_feature_##name(ctx_->isar); })
482
483 /* Note that the gvec expanders operate on offsets + sizes. */
484 typedef void GVecGen2Fn(unsigned, uint32_t, uint32_t, uint32_t, uint32_t);
485 typedef void GVecGen2iFn(unsigned, uint32_t, uint32_t, int64_t,
486 uint32_t, uint32_t);
487 typedef void GVecGen3Fn(unsigned, uint32_t, uint32_t,
488 uint32_t, uint32_t, uint32_t);
489 typedef void GVecGen4Fn(unsigned, uint32_t, uint32_t, uint32_t,
490 uint32_t, uint32_t, uint32_t);
491
492 /* Function prototype for gen_ functions for calling Neon helpers */
493 typedef void NeonGenOneOpFn(TCGv_i32, TCGv_i32);
494 typedef void NeonGenOneOpEnvFn(TCGv_i32, TCGv_ptr, TCGv_i32);
495 typedef void NeonGenTwoOpFn(TCGv_i32, TCGv_i32, TCGv_i32);
496 typedef void NeonGenTwoOpEnvFn(TCGv_i32, TCGv_ptr, TCGv_i32, TCGv_i32);
497 typedef void NeonGenThreeOpEnvFn(TCGv_i32, TCGv_env, TCGv_i32,
498 TCGv_i32, TCGv_i32);
499 typedef void NeonGenTwo64OpFn(TCGv_i64, TCGv_i64, TCGv_i64);
500 typedef void NeonGenTwo64OpEnvFn(TCGv_i64, TCGv_ptr, TCGv_i64, TCGv_i64);
501 typedef void NeonGenNarrowFn(TCGv_i32, TCGv_i64);
502 typedef void NeonGenNarrowEnvFn(TCGv_i32, TCGv_ptr, TCGv_i64);
503 typedef void NeonGenWidenFn(TCGv_i64, TCGv_i32);
504 typedef void NeonGenTwoOpWidenFn(TCGv_i64, TCGv_i32, TCGv_i32);
505 typedef void NeonGenOneSingleOpFn(TCGv_i32, TCGv_i32, TCGv_ptr);
506 typedef void NeonGenTwoSingleOpFn(TCGv_i32, TCGv_i32, TCGv_i32, TCGv_ptr);
507 typedef void NeonGenTwoDoubleOpFn(TCGv_i64, TCGv_i64, TCGv_i64, TCGv_ptr);
508 typedef void NeonGenOne64OpFn(TCGv_i64, TCGv_i64);
509 typedef void CryptoTwoOpFn(TCGv_ptr, TCGv_ptr);
510 typedef void CryptoThreeOpIntFn(TCGv_ptr, TCGv_ptr, TCGv_i32);
511 typedef void CryptoThreeOpFn(TCGv_ptr, TCGv_ptr, TCGv_ptr);
512 typedef void AtomicThreeOpFn(TCGv_i64, TCGv_i64, TCGv_i64, TCGArg, MemOp);
513 typedef void WideShiftImmFn(TCGv_i64, TCGv_i64, int64_t shift);
514 typedef void WideShiftFn(TCGv_i64, TCGv_ptr, TCGv_i64, TCGv_i32);
515 typedef void ShiftImmFn(TCGv_i32, TCGv_i32, int32_t shift);
516 typedef void ShiftFn(TCGv_i32, TCGv_ptr, TCGv_i32, TCGv_i32);
517
518 /**
519 * arm_tbflags_from_tb:
520 * @tb: the TranslationBlock
521 *
522 * Extract the flag values from @tb.
523 */
arm_tbflags_from_tb(const TranslationBlock * tb)524 static inline CPUARMTBFlags arm_tbflags_from_tb(const TranslationBlock *tb)
525 {
526 return (CPUARMTBFlags){ tb->flags, tb->cs_base };
527 }
528
529 /*
530 * Enum for argument to fpstatus_ptr().
531 */
532 typedef enum ARMFPStatusFlavour {
533 FPST_FPCR,
534 FPST_FPCR_F16,
535 FPST_STD,
536 FPST_STD_F16,
537 } ARMFPStatusFlavour;
538
539 /**
540 * fpstatus_ptr: return TCGv_ptr to the specified fp_status field
541 *
542 * We have multiple softfloat float_status fields in the Arm CPU state struct
543 * (see the comment in cpu.h for details). Return a TCGv_ptr which has
544 * been set up to point to the requested field in the CPU state struct.
545 * The options are:
546 *
547 * FPST_FPCR
548 * for non-FP16 operations controlled by the FPCR
549 * FPST_FPCR_F16
550 * for operations controlled by the FPCR where FPCR.FZ16 is to be used
551 * FPST_STD
552 * for A32/T32 Neon operations using the "standard FPSCR value"
553 * FPST_STD_F16
554 * as FPST_STD, but where FPCR.FZ16 is to be used
555 */
fpstatus_ptr(ARMFPStatusFlavour flavour)556 static inline TCGv_ptr fpstatus_ptr(ARMFPStatusFlavour flavour)
557 {
558 TCGv_ptr statusptr = tcg_temp_new_ptr();
559 int offset;
560
561 switch (flavour) {
562 case FPST_FPCR:
563 offset = offsetof(CPUARMState, vfp.fp_status);
564 break;
565 case FPST_FPCR_F16:
566 offset = offsetof(CPUARMState, vfp.fp_status_f16);
567 break;
568 case FPST_STD:
569 offset = offsetof(CPUARMState, vfp.standard_fp_status);
570 break;
571 case FPST_STD_F16:
572 offset = offsetof(CPUARMState, vfp.standard_fp_status_f16);
573 break;
574 default:
575 g_assert_not_reached();
576 }
577 tcg_gen_addi_ptr(statusptr, tcg_env, offset);
578 return statusptr;
579 }
580
581 /**
582 * finalize_memop_atom:
583 * @s: DisasContext
584 * @opc: size+sign+align of the memory operation
585 * @atom: atomicity of the memory operation
586 *
587 * Build the complete MemOp for a memory operation, including alignment,
588 * endianness, and atomicity.
589 *
590 * If (op & MO_AMASK) then the operation already contains the required
591 * alignment, e.g. for AccType_ATOMIC. Otherwise, this an optionally
592 * unaligned operation, e.g. for AccType_NORMAL.
593 *
594 * In the latter case, there are configuration bits that require alignment,
595 * and this is applied here. Note that there is no way to indicate that
596 * no alignment should ever be enforced; this must be handled manually.
597 */
finalize_memop_atom(DisasContext * s,MemOp opc,MemOp atom)598 static inline MemOp finalize_memop_atom(DisasContext *s, MemOp opc, MemOp atom)
599 {
600 if (s->align_mem && !(opc & MO_AMASK)) {
601 opc |= MO_ALIGN;
602 }
603 return opc | atom | s->be_data;
604 }
605
606 /**
607 * finalize_memop:
608 * @s: DisasContext
609 * @opc: size+sign+align of the memory operation
610 *
611 * Like finalize_memop_atom, but with default atomicity.
612 */
finalize_memop(DisasContext * s,MemOp opc)613 static inline MemOp finalize_memop(DisasContext *s, MemOp opc)
614 {
615 MemOp atom = s->lse2 ? MO_ATOM_WITHIN16 : MO_ATOM_IFALIGN;
616 return finalize_memop_atom(s, opc, atom);
617 }
618
619 /**
620 * finalize_memop_pair:
621 * @s: DisasContext
622 * @opc: size+sign+align of the memory operation
623 *
624 * Like finalize_memop_atom, but with atomicity for a pair.
625 * C.f. Pseudocode for Mem[], operand ispair.
626 */
finalize_memop_pair(DisasContext * s,MemOp opc)627 static inline MemOp finalize_memop_pair(DisasContext *s, MemOp opc)
628 {
629 MemOp atom = s->lse2 ? MO_ATOM_WITHIN16_PAIR : MO_ATOM_IFALIGN_PAIR;
630 return finalize_memop_atom(s, opc, atom);
631 }
632
633 /**
634 * finalize_memop_asimd:
635 * @s: DisasContext
636 * @opc: size+sign+align of the memory operation
637 *
638 * Like finalize_memop_atom, but with atomicity of AccessType_ASIMD.
639 */
finalize_memop_asimd(DisasContext * s,MemOp opc)640 static inline MemOp finalize_memop_asimd(DisasContext *s, MemOp opc)
641 {
642 /*
643 * In the pseudocode for Mem[], with AccessType_ASIMD, size == 16,
644 * if IsAligned(8), the first case provides separate atomicity for
645 * the pair of 64-bit accesses. If !IsAligned(8), the middle cases
646 * do not apply, and we're left with the final case of no atomicity.
647 * Thus MO_ATOM_IFALIGN_PAIR.
648 *
649 * For other sizes, normal LSE2 rules apply.
650 */
651 if ((opc & MO_SIZE) == MO_128) {
652 return finalize_memop_atom(s, opc, MO_ATOM_IFALIGN_PAIR);
653 }
654 return finalize_memop(s, opc);
655 }
656
657 /**
658 * asimd_imm_const: Expand an encoded SIMD constant value
659 *
660 * Expand a SIMD constant value. This is essentially the pseudocode
661 * AdvSIMDExpandImm, except that we also perform the boolean NOT needed for
662 * VMVN and VBIC (when cmode < 14 && op == 1).
663 *
664 * The combination cmode == 15 op == 1 is a reserved encoding for AArch32;
665 * callers must catch this; we return the 64-bit constant value defined
666 * for AArch64.
667 *
668 * cmode = 2,3,4,5,6,7,10,11,12,13 imm=0 was UNPREDICTABLE in v7A but
669 * is either not unpredictable or merely CONSTRAINED UNPREDICTABLE in v8A;
670 * we produce an immediate constant value of 0 in these cases.
671 */
672 uint64_t asimd_imm_const(uint32_t imm, int cmode, int op);
673
674 /*
675 * gen_disas_label:
676 * Create a label and cache a copy of pc_save.
677 */
gen_disas_label(DisasContext * s)678 static inline DisasLabel gen_disas_label(DisasContext *s)
679 {
680 return (DisasLabel){
681 .label = gen_new_label(),
682 .pc_save = s->pc_save,
683 };
684 }
685
686 /*
687 * set_disas_label:
688 * Emit a label and restore the cached copy of pc_save.
689 */
set_disas_label(DisasContext * s,DisasLabel l)690 static inline void set_disas_label(DisasContext *s, DisasLabel l)
691 {
692 gen_set_label(l.label);
693 s->pc_save = l.pc_save;
694 }
695
gen_lookup_cp_reg(uint32_t key)696 static inline TCGv_ptr gen_lookup_cp_reg(uint32_t key)
697 {
698 TCGv_ptr ret = tcg_temp_new_ptr();
699 gen_helper_lookup_cp_reg(ret, tcg_env, tcg_constant_i32(key));
700 return ret;
701 }
702
703 /*
704 * Set and reset rounding mode around another operation.
705 */
gen_set_rmode(ARMFPRounding rmode,TCGv_ptr fpst)706 static inline TCGv_i32 gen_set_rmode(ARMFPRounding rmode, TCGv_ptr fpst)
707 {
708 TCGv_i32 new = tcg_constant_i32(arm_rmode_to_sf(rmode));
709 TCGv_i32 old = tcg_temp_new_i32();
710
711 gen_helper_set_rmode(old, new, fpst);
712 return old;
713 }
714
gen_restore_rmode(TCGv_i32 old,TCGv_ptr fpst)715 static inline void gen_restore_rmode(TCGv_i32 old, TCGv_ptr fpst)
716 {
717 gen_helper_set_rmode(old, old, fpst);
718 }
719
720 /*
721 * Helpers for implementing sets of trans_* functions.
722 * Defer the implementation of NAME to FUNC, with optional extra arguments.
723 */
724 #define TRANS(NAME, FUNC, ...) \
725 static bool trans_##NAME(DisasContext *s, arg_##NAME *a) \
726 { return FUNC(s, __VA_ARGS__); }
727 #define TRANS_FEAT(NAME, FEAT, FUNC, ...) \
728 static bool trans_##NAME(DisasContext *s, arg_##NAME *a) \
729 { return dc_isar_feature(FEAT, s) && FUNC(s, __VA_ARGS__); }
730
731 #define TRANS_FEAT_NONSTREAMING(NAME, FEAT, FUNC, ...) \
732 static bool trans_##NAME(DisasContext *s, arg_##NAME *a) \
733 { \
734 s->is_nonstreaming = true; \
735 return dc_isar_feature(FEAT, s) && FUNC(s, __VA_ARGS__); \
736 }
737
738 #endif /* TARGET_ARM_TRANSLATE_H */
739