xref: /openbmc/qemu/target/arm/tcg/translate.h (revision 4c2c0474)
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 
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 
xor_2(DisasContext * s,int x)255 static inline int xor_2(DisasContext *s, int x)
256 {
257     return x ^ 2;
258 }
259 
neon_3same_fp_size(DisasContext * s,int x)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 
arm_dc_feature(DisasContext * dc,int feature)266 static inline int arm_dc_feature(DisasContext *dc, int feature)
267 {
268     return (dc->features & (1ULL << feature)) != 0;
269 }
270 
get_mem_index(DisasContext * s)271 static inline int get_mem_index(DisasContext *s)
272 {
273     return arm_to_core_mmu_idx(s->mmu_idx);
274 }
275 
disas_set_insn_syndrome(DisasContext * s,uint32_t syn)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 
curr_insn_len(DisasContext * s)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
a64_translate_init(void)330 static inline void a64_translate_init(void)
331 {
332 }
333 
gen_a64_update_pc(DisasContext * s,target_long diff)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 */
get_ahp_flag(void)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.  */
set_pstate_bits(uint32_t bits)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.  */
clear_pstate_bits(uint32_t bits)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. */
gen_ss_advance(DisasContext * s)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 */
gen_swstep_exception(DisasContext * s,int isv,int ex)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 
gen_vfp_absh(TCGv_i32 d,TCGv_i32 s)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 
gen_vfp_abss(TCGv_i32 d,TCGv_i32 s)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 
gen_vfp_absd(TCGv_i64 d,TCGv_i64 s)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 
gen_vfp_negh(TCGv_i32 d,TCGv_i32 s)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 
gen_vfp_negs(TCGv_i32 d,TCGv_i32 s)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 
gen_vfp_negd(TCGv_i64 d,TCGv_i64 s)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_gvec_shadd(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
475                     uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
476 void gen_gvec_uhadd(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
477                     uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
478 void gen_gvec_shsub(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
479                     uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
480 void gen_gvec_uhsub(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
481                     uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
482 void gen_gvec_srhadd(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
483                      uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
484 void gen_gvec_urhadd(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
485                      uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
486 
487 void gen_cmtst_i64(TCGv_i64 d, TCGv_i64 a, TCGv_i64 b);
488 void gen_ushl_i32(TCGv_i32 d, TCGv_i32 a, TCGv_i32 b);
489 void gen_sshl_i32(TCGv_i32 d, TCGv_i32 a, TCGv_i32 b);
490 void gen_ushl_i64(TCGv_i64 d, TCGv_i64 a, TCGv_i64 b);
491 void gen_sshl_i64(TCGv_i64 d, TCGv_i64 a, TCGv_i64 b);
492 
493 void gen_uqadd_bhs(TCGv_i64 res, TCGv_i64 qc,
494                    TCGv_i64 a, TCGv_i64 b, MemOp esz);
495 void gen_uqadd_d(TCGv_i64 d, TCGv_i64 q, TCGv_i64 a, TCGv_i64 b);
496 void gen_gvec_uqadd_qc(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
497                        uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
498 
499 void gen_sqadd_bhs(TCGv_i64 res, TCGv_i64 qc,
500                    TCGv_i64 a, TCGv_i64 b, MemOp esz);
501 void gen_sqadd_d(TCGv_i64 d, TCGv_i64 q, TCGv_i64 a, TCGv_i64 b);
502 void gen_gvec_sqadd_qc(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
503                        uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
504 
505 void gen_uqsub_bhs(TCGv_i64 res, TCGv_i64 qc,
506                    TCGv_i64 a, TCGv_i64 b, MemOp esz);
507 void gen_uqsub_d(TCGv_i64 d, TCGv_i64 q, TCGv_i64 a, TCGv_i64 b);
508 void gen_gvec_uqsub_qc(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
509                        uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
510 
511 void gen_sqsub_bhs(TCGv_i64 res, TCGv_i64 qc,
512                    TCGv_i64 a, TCGv_i64 b, MemOp esz);
513 void gen_sqsub_d(TCGv_i64 d, TCGv_i64 q, TCGv_i64 a, TCGv_i64 b);
514 void gen_gvec_sqsub_qc(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
515                        uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
516 
517 void gen_gvec_ssra(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs,
518                    int64_t shift, uint32_t opr_sz, uint32_t max_sz);
519 void gen_gvec_usra(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs,
520                    int64_t shift, uint32_t opr_sz, uint32_t max_sz);
521 
522 void gen_srshr32_i32(TCGv_i32 d, TCGv_i32 a, int32_t sh);
523 void gen_srshr64_i64(TCGv_i64 d, TCGv_i64 a, int64_t sh);
524 void gen_urshr32_i32(TCGv_i32 d, TCGv_i32 a, int32_t sh);
525 void gen_urshr64_i64(TCGv_i64 d, TCGv_i64 a, int64_t sh);
526 
527 void gen_gvec_srshr(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs,
528                     int64_t shift, uint32_t opr_sz, uint32_t max_sz);
529 void gen_gvec_urshr(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_srsra(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs,
532                     int64_t shift, uint32_t opr_sz, uint32_t max_sz);
533 void gen_gvec_ursra(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs,
534                     int64_t shift, uint32_t opr_sz, uint32_t max_sz);
535 
536 void gen_gvec_sri(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs,
537                   int64_t shift, uint32_t opr_sz, uint32_t max_sz);
538 void gen_gvec_sli(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs,
539                   int64_t shift, uint32_t opr_sz, uint32_t max_sz);
540 
541 void gen_gvec_sqdmulh_qc(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
542                          uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
543 void gen_gvec_sqrdmulh_qc(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
544                           uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
545 void gen_gvec_sqrdmlah_qc(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
546                           uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
547 void gen_gvec_sqrdmlsh_qc(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
548                           uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
549 
550 void gen_gvec_sabd(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
551                    uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
552 void gen_gvec_uabd(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
553                    uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
554 
555 void gen_gvec_saba(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_uaba(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
558                    uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
559 
560 void gen_gvec_addp(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
561                    uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
562 void gen_gvec_smaxp(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_sminp(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
565                     uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
566 void gen_gvec_umaxp(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
567                     uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
568 void gen_gvec_uminp(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
569                     uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
570 
571 /*
572  * Forward to the isar_feature_* tests given a DisasContext pointer.
573  */
574 #define dc_isar_feature(name, ctx) \
575     ({ DisasContext *ctx_ = (ctx); isar_feature_##name(ctx_->isar); })
576 
577 /* Note that the gvec expanders operate on offsets + sizes.  */
578 typedef void GVecGen2Fn(unsigned, uint32_t, uint32_t, uint32_t, uint32_t);
579 typedef void GVecGen2iFn(unsigned, uint32_t, uint32_t, int64_t,
580                          uint32_t, uint32_t);
581 typedef void GVecGen3Fn(unsigned, uint32_t, uint32_t,
582                         uint32_t, uint32_t, uint32_t);
583 typedef void GVecGen4Fn(unsigned, uint32_t, uint32_t, uint32_t,
584                         uint32_t, uint32_t, uint32_t);
585 
586 /* Function prototype for gen_ functions for calling Neon helpers */
587 typedef void NeonGenOneOpFn(TCGv_i32, TCGv_i32);
588 typedef void NeonGenOneOpEnvFn(TCGv_i32, TCGv_ptr, TCGv_i32);
589 typedef void NeonGenTwoOpFn(TCGv_i32, TCGv_i32, TCGv_i32);
590 typedef void NeonGenTwoOpEnvFn(TCGv_i32, TCGv_ptr, TCGv_i32, TCGv_i32);
591 typedef void NeonGenThreeOpEnvFn(TCGv_i32, TCGv_env, TCGv_i32,
592                                  TCGv_i32, TCGv_i32);
593 typedef void NeonGenTwo64OpFn(TCGv_i64, TCGv_i64, TCGv_i64);
594 typedef void NeonGenTwo64OpEnvFn(TCGv_i64, TCGv_ptr, TCGv_i64, TCGv_i64);
595 typedef void NeonGenNarrowFn(TCGv_i32, TCGv_i64);
596 typedef void NeonGenNarrowEnvFn(TCGv_i32, TCGv_ptr, TCGv_i64);
597 typedef void NeonGenWidenFn(TCGv_i64, TCGv_i32);
598 typedef void NeonGenTwoOpWidenFn(TCGv_i64, TCGv_i32, TCGv_i32);
599 typedef void NeonGenOneSingleOpFn(TCGv_i32, TCGv_i32, TCGv_ptr);
600 typedef void NeonGenTwoSingleOpFn(TCGv_i32, TCGv_i32, TCGv_i32, TCGv_ptr);
601 typedef void NeonGenTwoDoubleOpFn(TCGv_i64, TCGv_i64, TCGv_i64, TCGv_ptr);
602 typedef void NeonGenOne64OpFn(TCGv_i64, TCGv_i64);
603 typedef void CryptoTwoOpFn(TCGv_ptr, TCGv_ptr);
604 typedef void CryptoThreeOpIntFn(TCGv_ptr, TCGv_ptr, TCGv_i32);
605 typedef void CryptoThreeOpFn(TCGv_ptr, TCGv_ptr, TCGv_ptr);
606 typedef void AtomicThreeOpFn(TCGv_i64, TCGv_i64, TCGv_i64, TCGArg, MemOp);
607 typedef void WideShiftImmFn(TCGv_i64, TCGv_i64, int64_t shift);
608 typedef void WideShiftFn(TCGv_i64, TCGv_ptr, TCGv_i64, TCGv_i32);
609 typedef void ShiftImmFn(TCGv_i32, TCGv_i32, int32_t shift);
610 typedef void ShiftFn(TCGv_i32, TCGv_ptr, TCGv_i32, TCGv_i32);
611 
612 /**
613  * arm_tbflags_from_tb:
614  * @tb: the TranslationBlock
615  *
616  * Extract the flag values from @tb.
617  */
arm_tbflags_from_tb(const TranslationBlock * tb)618 static inline CPUARMTBFlags arm_tbflags_from_tb(const TranslationBlock *tb)
619 {
620     return (CPUARMTBFlags){ tb->flags, tb->cs_base };
621 }
622 
623 /*
624  * Enum for argument to fpstatus_ptr().
625  */
626 typedef enum ARMFPStatusFlavour {
627     FPST_FPCR,
628     FPST_FPCR_F16,
629     FPST_STD,
630     FPST_STD_F16,
631 } ARMFPStatusFlavour;
632 
633 /**
634  * fpstatus_ptr: return TCGv_ptr to the specified fp_status field
635  *
636  * We have multiple softfloat float_status fields in the Arm CPU state struct
637  * (see the comment in cpu.h for details). Return a TCGv_ptr which has
638  * been set up to point to the requested field in the CPU state struct.
639  * The options are:
640  *
641  * FPST_FPCR
642  *   for non-FP16 operations controlled by the FPCR
643  * FPST_FPCR_F16
644  *   for operations controlled by the FPCR where FPCR.FZ16 is to be used
645  * FPST_STD
646  *   for A32/T32 Neon operations using the "standard FPSCR value"
647  * FPST_STD_F16
648  *   as FPST_STD, but where FPCR.FZ16 is to be used
649  */
fpstatus_ptr(ARMFPStatusFlavour flavour)650 static inline TCGv_ptr fpstatus_ptr(ARMFPStatusFlavour flavour)
651 {
652     TCGv_ptr statusptr = tcg_temp_new_ptr();
653     int offset;
654 
655     switch (flavour) {
656     case FPST_FPCR:
657         offset = offsetof(CPUARMState, vfp.fp_status);
658         break;
659     case FPST_FPCR_F16:
660         offset = offsetof(CPUARMState, vfp.fp_status_f16);
661         break;
662     case FPST_STD:
663         offset = offsetof(CPUARMState, vfp.standard_fp_status);
664         break;
665     case FPST_STD_F16:
666         offset = offsetof(CPUARMState, vfp.standard_fp_status_f16);
667         break;
668     default:
669         g_assert_not_reached();
670     }
671     tcg_gen_addi_ptr(statusptr, tcg_env, offset);
672     return statusptr;
673 }
674 
675 /**
676  * finalize_memop_atom:
677  * @s: DisasContext
678  * @opc: size+sign+align of the memory operation
679  * @atom: atomicity of the memory operation
680  *
681  * Build the complete MemOp for a memory operation, including alignment,
682  * endianness, and atomicity.
683  *
684  * If (op & MO_AMASK) then the operation already contains the required
685  * alignment, e.g. for AccType_ATOMIC.  Otherwise, this an optionally
686  * unaligned operation, e.g. for AccType_NORMAL.
687  *
688  * In the latter case, there are configuration bits that require alignment,
689  * and this is applied here.  Note that there is no way to indicate that
690  * no alignment should ever be enforced; this must be handled manually.
691  */
finalize_memop_atom(DisasContext * s,MemOp opc,MemOp atom)692 static inline MemOp finalize_memop_atom(DisasContext *s, MemOp opc, MemOp atom)
693 {
694     if (s->align_mem && !(opc & MO_AMASK)) {
695         opc |= MO_ALIGN;
696     }
697     return opc | atom | s->be_data;
698 }
699 
700 /**
701  * finalize_memop:
702  * @s: DisasContext
703  * @opc: size+sign+align of the memory operation
704  *
705  * Like finalize_memop_atom, but with default atomicity.
706  */
finalize_memop(DisasContext * s,MemOp opc)707 static inline MemOp finalize_memop(DisasContext *s, MemOp opc)
708 {
709     MemOp atom = s->lse2 ? MO_ATOM_WITHIN16 : MO_ATOM_IFALIGN;
710     return finalize_memop_atom(s, opc, atom);
711 }
712 
713 /**
714  * finalize_memop_pair:
715  * @s: DisasContext
716  * @opc: size+sign+align of the memory operation
717  *
718  * Like finalize_memop_atom, but with atomicity for a pair.
719  * C.f. Pseudocode for Mem[], operand ispair.
720  */
finalize_memop_pair(DisasContext * s,MemOp opc)721 static inline MemOp finalize_memop_pair(DisasContext *s, MemOp opc)
722 {
723     MemOp atom = s->lse2 ? MO_ATOM_WITHIN16_PAIR : MO_ATOM_IFALIGN_PAIR;
724     return finalize_memop_atom(s, opc, atom);
725 }
726 
727 /**
728  * finalize_memop_asimd:
729  * @s: DisasContext
730  * @opc: size+sign+align of the memory operation
731  *
732  * Like finalize_memop_atom, but with atomicity of AccessType_ASIMD.
733  */
finalize_memop_asimd(DisasContext * s,MemOp opc)734 static inline MemOp finalize_memop_asimd(DisasContext *s, MemOp opc)
735 {
736     /*
737      * In the pseudocode for Mem[], with AccessType_ASIMD, size == 16,
738      * if IsAligned(8), the first case provides separate atomicity for
739      * the pair of 64-bit accesses.  If !IsAligned(8), the middle cases
740      * do not apply, and we're left with the final case of no atomicity.
741      * Thus MO_ATOM_IFALIGN_PAIR.
742      *
743      * For other sizes, normal LSE2 rules apply.
744      */
745     if ((opc & MO_SIZE) == MO_128) {
746         return finalize_memop_atom(s, opc, MO_ATOM_IFALIGN_PAIR);
747     }
748     return finalize_memop(s, opc);
749 }
750 
751 /**
752  * asimd_imm_const: Expand an encoded SIMD constant value
753  *
754  * Expand a SIMD constant value. This is essentially the pseudocode
755  * AdvSIMDExpandImm, except that we also perform the boolean NOT needed for
756  * VMVN and VBIC (when cmode < 14 && op == 1).
757  *
758  * The combination cmode == 15 op == 1 is a reserved encoding for AArch32;
759  * callers must catch this; we return the 64-bit constant value defined
760  * for AArch64.
761  *
762  * cmode = 2,3,4,5,6,7,10,11,12,13 imm=0 was UNPREDICTABLE in v7A but
763  * is either not unpredictable or merely CONSTRAINED UNPREDICTABLE in v8A;
764  * we produce an immediate constant value of 0 in these cases.
765  */
766 uint64_t asimd_imm_const(uint32_t imm, int cmode, int op);
767 
768 /*
769  * gen_disas_label:
770  * Create a label and cache a copy of pc_save.
771  */
gen_disas_label(DisasContext * s)772 static inline DisasLabel gen_disas_label(DisasContext *s)
773 {
774     return (DisasLabel){
775         .label = gen_new_label(),
776         .pc_save = s->pc_save,
777     };
778 }
779 
780 /*
781  * set_disas_label:
782  * Emit a label and restore the cached copy of pc_save.
783  */
set_disas_label(DisasContext * s,DisasLabel l)784 static inline void set_disas_label(DisasContext *s, DisasLabel l)
785 {
786     gen_set_label(l.label);
787     s->pc_save = l.pc_save;
788 }
789 
gen_lookup_cp_reg(uint32_t key)790 static inline TCGv_ptr gen_lookup_cp_reg(uint32_t key)
791 {
792     TCGv_ptr ret = tcg_temp_new_ptr();
793     gen_helper_lookup_cp_reg(ret, tcg_env, tcg_constant_i32(key));
794     return ret;
795 }
796 
797 /*
798  * Set and reset rounding mode around another operation.
799  */
gen_set_rmode(ARMFPRounding rmode,TCGv_ptr fpst)800 static inline TCGv_i32 gen_set_rmode(ARMFPRounding rmode, TCGv_ptr fpst)
801 {
802     TCGv_i32 new = tcg_constant_i32(arm_rmode_to_sf(rmode));
803     TCGv_i32 old = tcg_temp_new_i32();
804 
805     gen_helper_set_rmode(old, new, fpst);
806     return old;
807 }
808 
gen_restore_rmode(TCGv_i32 old,TCGv_ptr fpst)809 static inline void gen_restore_rmode(TCGv_i32 old, TCGv_ptr fpst)
810 {
811     gen_helper_set_rmode(old, old, fpst);
812 }
813 
814 /*
815  * Helpers for implementing sets of trans_* functions.
816  * Defer the implementation of NAME to FUNC, with optional extra arguments.
817  */
818 #define TRANS(NAME, FUNC, ...) \
819     static bool trans_##NAME(DisasContext *s, arg_##NAME *a) \
820     { return FUNC(s, __VA_ARGS__); }
821 #define TRANS_FEAT(NAME, FEAT, FUNC, ...) \
822     static bool trans_##NAME(DisasContext *s, arg_##NAME *a) \
823     { return dc_isar_feature(FEAT, s) && FUNC(s, __VA_ARGS__); }
824 
825 #define TRANS_FEAT_NONSTREAMING(NAME, FEAT, FUNC, ...)            \
826     static bool trans_##NAME(DisasContext *s, arg_##NAME *a)      \
827     {                                                             \
828         s->is_nonstreaming = true;                                \
829         return dc_isar_feature(FEAT, s) && FUNC(s, __VA_ARGS__);  \
830     }
831 
832 #endif /* TARGET_ARM_TRANSLATE_H */
833