target/arm/translate-a64.h

   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 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 void unallocated_encoding(DisasContext *s);
  22
  23 #define unsupported_encoding(s, insn)                                    \
  24     do {                                                                 \
  25         qemu_log_mask(LOG_UNIMP,                                         \
  26                       "%s:%d: unsupported instruction encoding 0x%08x "  \
  27                       "at pc=%016" PRIx64 "\n",                          \
  28                       __FILE__, __LINE__, insn, s->pc_curr);             \
  29         unallocated_encoding(s);                                         \
  30     } while (0)
  31
  32 TCGv_i64 new_tmp_a64(DisasContext *s);
  33 TCGv_i64 new_tmp_a64_zero(DisasContext *s);
  34 TCGv_i64 cpu_reg(DisasContext *s, int reg);
  35 TCGv_i64 cpu_reg_sp(DisasContext *s, int reg);
  36 TCGv_i64 read_cpu_reg(DisasContext *s, int reg, int sf);
  37 TCGv_i64 read_cpu_reg_sp(DisasContext *s, int reg, int sf);
  38 void write_fp_dreg(DisasContext *s, int reg, TCGv_i64 v);
  39 TCGv_ptr get_fpstatus_ptr(bool);
  40 bool logic_imm_decode_wmask(uint64_t *result, unsigned int immn,
  41                             unsigned int imms, unsigned int immr);
  42 bool sve_access_check(DisasContext *s);
  43
  44 /* We should have at some point before trying to access an FP register
  45  * done the necessary access check, so assert that
  46  * (a) we did the check and
  47  * (b) we didn't then just plough ahead anyway if it failed.
  48  * Print the instruction pattern in the abort message so we can figure
  49  * out what we need to fix if a user encounters this problem in the wild.
  50  */
  51 static inline void assert_fp_access_checked(DisasContext *s)
  52 {
  53 #ifdef CONFIG_DEBUG_TCG
  54     if (unlikely(!s->fp_access_checked || s->fp_excp_el)) {
  55         fprintf(stderr, "target-arm: FP access check missing for "
  56                 "instruction 0x%08x\n", s->insn);
  57         abort();
  58     }
  59 #endif
  60 }
  61
  62 /* Return the offset into CPUARMState of an element of specified
  63  * size, 'element' places in from the least significant end of
  64  * the FP/vector register Qn.
  65  */
  66 static inline int vec_reg_offset(DisasContext *s, int regno,
  67                                  int element, MemOp size)
  68 {
  69     int element_size = 1 << size;
  70     int offs = element * element_size;
  71 #ifdef HOST_WORDS_BIGENDIAN
  72     /* This is complicated slightly because vfp.zregs[n].d[0] is
  73      * still the lowest and vfp.zregs[n].d[15] the highest of the
  74      * 256 byte vector, even on big endian systems.
  75      *
  76      * Calculate the offset assuming fully little-endian,
  77      * then XOR to account for the order of the 8-byte units.
  78      *
  79      * For 16 byte elements, the two 8 byte halves will not form a
  80      * host int128 if the host is bigendian, since they're in the
  81      * wrong order.  However the only 16 byte operation we have is
  82      * a move, so we can ignore this for the moment.  More complicated
  83      * operations will have to special case loading and storing from
  84      * the zregs array.
  85      */
  86     if (element_size < 8) {
  87         offs ^= 8 - element_size;
  88     }
  89 #endif
  90     offs += offsetof(CPUARMState, vfp.zregs[regno]);
  91     assert_fp_access_checked(s);
  92     return offs;
  93 }
  94
  95 /* Return the offset info CPUARMState of the "whole" vector register Qn.  */
  96 static inline int vec_full_reg_offset(DisasContext *s, int regno)
  97 {
  98     assert_fp_access_checked(s);
  99     return offsetof(CPUARMState, vfp.zregs[regno]);
 100 }
 101
 102 /* Return a newly allocated pointer to the vector register.  */
 103 static inline TCGv_ptr vec_full_reg_ptr(DisasContext *s, int regno)
 104 {
 105     TCGv_ptr ret = tcg_temp_new_ptr();
 106     tcg_gen_addi_ptr(ret, cpu_env, vec_full_reg_offset(s, regno));
 107     return ret;
 108 }
 109
 110 /* Return the byte size of the "whole" vector register, VL / 8.  */
 111 static inline int vec_full_reg_size(DisasContext *s)
 112 {
 113     return s->sve_len;
 114 }
 115
 116 bool disas_sve(DisasContext *, uint32_t);
 117
 118 #endif /* TARGET_ARM_TRANSLATE_A64_H */