xref: /openbmc/qemu/target/arm/tcg/translate-a64.h (revision 1217edac)
1 /*
2  *  AArch64 translation, common definitions.
3  *
4  * This library is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * This library is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
16  */
17 
18 #ifndef TARGET_ARM_TRANSLATE_A64_H
19 #define TARGET_ARM_TRANSLATE_A64_H
20 
21 TCGv_i64 cpu_reg(DisasContext *s, int reg);
22 TCGv_i64 cpu_reg_sp(DisasContext *s, int reg);
23 TCGv_i64 read_cpu_reg(DisasContext *s, int reg, int sf);
24 TCGv_i64 read_cpu_reg_sp(DisasContext *s, int reg, int sf);
25 void write_fp_dreg(DisasContext *s, int reg, TCGv_i64 v);
26 bool logic_imm_decode_wmask(uint64_t *result, unsigned int immn,
27                             unsigned int imms, unsigned int immr);
28 bool sve_access_check(DisasContext *s);
29 bool sme_enabled_check(DisasContext *s);
30 bool sme_enabled_check_with_svcr(DisasContext *s, unsigned);
31 uint32_t make_svemte_desc(DisasContext *s, unsigned vsz, uint32_t nregs,
32                           uint32_t msz, bool is_write, uint32_t data);
33 
34 /* This function corresponds to CheckStreamingSVEEnabled. */
sme_sm_enabled_check(DisasContext * s)35 static inline bool sme_sm_enabled_check(DisasContext *s)
36 {
37     return sme_enabled_check_with_svcr(s, R_SVCR_SM_MASK);
38 }
39 
40 /* This function corresponds to CheckSMEAndZAEnabled. */
sme_za_enabled_check(DisasContext * s)41 static inline bool sme_za_enabled_check(DisasContext *s)
42 {
43     return sme_enabled_check_with_svcr(s, R_SVCR_ZA_MASK);
44 }
45 
46 /* Note that this function corresponds to CheckStreamingSVEAndZAEnabled. */
sme_smza_enabled_check(DisasContext * s)47 static inline bool sme_smza_enabled_check(DisasContext *s)
48 {
49     return sme_enabled_check_with_svcr(s, R_SVCR_SM_MASK | R_SVCR_ZA_MASK);
50 }
51 
52 TCGv_i64 clean_data_tbi(DisasContext *s, TCGv_i64 addr);
53 TCGv_i64 gen_mte_check1(DisasContext *s, TCGv_i64 addr, bool is_write,
54                         bool tag_checked, MemOp memop);
55 TCGv_i64 gen_mte_checkN(DisasContext *s, TCGv_i64 addr, bool is_write,
56                         bool tag_checked, int total_size, MemOp memop);
57 
58 /* We should have at some point before trying to access an FP register
59  * done the necessary access check, so assert that
60  * (a) we did the check and
61  * (b) we didn't then just plough ahead anyway if it failed.
62  * Print the instruction pattern in the abort message so we can figure
63  * out what we need to fix if a user encounters this problem in the wild.
64  */
assert_fp_access_checked(DisasContext * s)65 static inline void assert_fp_access_checked(DisasContext *s)
66 {
67 #ifdef CONFIG_DEBUG_TCG
68     if (unlikely(!s->fp_access_checked || s->fp_excp_el)) {
69         fprintf(stderr, "target-arm: FP access check missing for "
70                 "instruction 0x%08x\n", s->insn);
71         abort();
72     }
73 #endif
74 }
75 
76 /* Return the offset into CPUARMState of an element of specified
77  * size, 'element' places in from the least significant end of
78  * the FP/vector register Qn.
79  */
vec_reg_offset(DisasContext * s,int regno,int element,MemOp size)80 static inline int vec_reg_offset(DisasContext *s, int regno,
81                                  int element, MemOp size)
82 {
83     int element_size = 1 << size;
84     int offs = element * element_size;
85 #if HOST_BIG_ENDIAN
86     /* This is complicated slightly because vfp.zregs[n].d[0] is
87      * still the lowest and vfp.zregs[n].d[15] the highest of the
88      * 256 byte vector, even on big endian systems.
89      *
90      * Calculate the offset assuming fully little-endian,
91      * then XOR to account for the order of the 8-byte units.
92      *
93      * For 16 byte elements, the two 8 byte halves will not form a
94      * host int128 if the host is bigendian, since they're in the
95      * wrong order.  However the only 16 byte operation we have is
96      * a move, so we can ignore this for the moment.  More complicated
97      * operations will have to special case loading and storing from
98      * the zregs array.
99      */
100     if (element_size < 8) {
101         offs ^= 8 - element_size;
102     }
103 #endif
104     offs += offsetof(CPUARMState, vfp.zregs[regno]);
105     assert_fp_access_checked(s);
106     return offs;
107 }
108 
109 /* Return the offset info CPUARMState of the "whole" vector register Qn.  */
vec_full_reg_offset(DisasContext * s,int regno)110 static inline int vec_full_reg_offset(DisasContext *s, int regno)
111 {
112     assert_fp_access_checked(s);
113     return offsetof(CPUARMState, vfp.zregs[regno]);
114 }
115 
116 /* Return a newly allocated pointer to the vector register.  */
vec_full_reg_ptr(DisasContext * s,int regno)117 static inline TCGv_ptr vec_full_reg_ptr(DisasContext *s, int regno)
118 {
119     TCGv_ptr ret = tcg_temp_new_ptr();
120     tcg_gen_addi_ptr(ret, tcg_env, vec_full_reg_offset(s, regno));
121     return ret;
122 }
123 
124 /* Return the byte size of the "whole" vector register, VL / 8.  */
vec_full_reg_size(DisasContext * s)125 static inline int vec_full_reg_size(DisasContext *s)
126 {
127     return s->vl;
128 }
129 
130 /* Return the byte size of the vector register, SVL / 8. */
streaming_vec_reg_size(DisasContext * s)131 static inline int streaming_vec_reg_size(DisasContext *s)
132 {
133     return s->svl;
134 }
135 
136 /*
137  * Return the offset info CPUARMState of the predicate vector register Pn.
138  * Note for this purpose, FFR is P16.
139  */
pred_full_reg_offset(DisasContext * s,int regno)140 static inline int pred_full_reg_offset(DisasContext *s, int regno)
141 {
142     return offsetof(CPUARMState, vfp.pregs[regno]);
143 }
144 
145 /* Return the byte size of the whole predicate register, VL / 64.  */
pred_full_reg_size(DisasContext * s)146 static inline int pred_full_reg_size(DisasContext *s)
147 {
148     return s->vl >> 3;
149 }
150 
151 /* Return the byte size of the predicate register, SVL / 64.  */
streaming_pred_reg_size(DisasContext * s)152 static inline int streaming_pred_reg_size(DisasContext *s)
153 {
154     return s->svl >> 3;
155 }
156 
157 /*
158  * Round up the size of a register to a size allowed by
159  * the tcg vector infrastructure.  Any operation which uses this
160  * size may assume that the bits above pred_full_reg_size are zero,
161  * and must leave them the same way.
162  *
163  * Note that this is not needed for the vector registers as they
164  * are always properly sized for tcg vectors.
165  */
size_for_gvec(int size)166 static inline int size_for_gvec(int size)
167 {
168     if (size <= 8) {
169         return 8;
170     } else {
171         return QEMU_ALIGN_UP(size, 16);
172     }
173 }
174 
pred_gvec_reg_size(DisasContext * s)175 static inline int pred_gvec_reg_size(DisasContext *s)
176 {
177     return size_for_gvec(pred_full_reg_size(s));
178 }
179 
180 /* Return a newly allocated pointer to the predicate register.  */
pred_full_reg_ptr(DisasContext * s,int regno)181 static inline TCGv_ptr pred_full_reg_ptr(DisasContext *s, int regno)
182 {
183     TCGv_ptr ret = tcg_temp_new_ptr();
184     tcg_gen_addi_ptr(ret, tcg_env, pred_full_reg_offset(s, regno));
185     return ret;
186 }
187 
188 bool disas_sve(DisasContext *, uint32_t);
189 bool disas_sme(DisasContext *, uint32_t);
190 
191 void gen_gvec_rax1(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
192                    uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
193 void gen_gvec_xar(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
194                   uint32_t rm_ofs, int64_t shift,
195                   uint32_t opr_sz, uint32_t max_sz);
196 void gen_gvec_eor3(unsigned vece, uint32_t d, uint32_t n, uint32_t m,
197                    uint32_t a, uint32_t oprsz, uint32_t maxsz);
198 void gen_gvec_bcax(unsigned vece, uint32_t d, uint32_t n, uint32_t m,
199                    uint32_t a, uint32_t oprsz, uint32_t maxsz);
200 
201 void gen_suqadd_bhs(TCGv_i64 res, TCGv_i64 qc,
202                     TCGv_i64 a, TCGv_i64 b, MemOp esz);
203 void gen_suqadd_d(TCGv_i64 res, TCGv_i64 qc, TCGv_i64 a, TCGv_i64 b);
204 void gen_gvec_suqadd_qc(unsigned vece, uint32_t rd_ofs,
205                         uint32_t rn_ofs, uint32_t rm_ofs,
206                         uint32_t opr_sz, uint32_t max_sz);
207 
208 void gen_usqadd_bhs(TCGv_i64 res, TCGv_i64 qc,
209                     TCGv_i64 a, TCGv_i64 b, MemOp esz);
210 void gen_usqadd_d(TCGv_i64 res, TCGv_i64 qc, TCGv_i64 a, TCGv_i64 b);
211 void gen_gvec_usqadd_qc(unsigned vece, uint32_t rd_ofs,
212                         uint32_t rn_ofs, uint32_t rm_ofs,
213                         uint32_t opr_sz, uint32_t max_sz);
214 
215 void gen_sve_ldr(DisasContext *s, TCGv_ptr, int vofs, int len, int rn, int imm);
216 void gen_sve_str(DisasContext *s, TCGv_ptr, int vofs, int len, int rn, int imm);
217 
218 #endif /* TARGET_ARM_TRANSLATE_A64_H */
219