tcg/i386/tcg-target.h

   1 /*
   2  * Tiny Code Generator for QEMU
   3  *
   4  * Copyright (c) 2008 Fabrice Bellard
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24
  25 #ifndef I386_TCG_TARGET_H
  26 #define I386_TCG_TARGET_H
  27
  28 #define TCG_TARGET_INSN_UNIT_SIZE  1
  29 #define TCG_TARGET_TLB_DISPLACEMENT_BITS 31
  30
  31 #ifdef __x86_64__
  32 # define TCG_TARGET_REG_BITS  64
  33 # define TCG_TARGET_NB_REGS   32
  34 # define MAX_CODE_GEN_BUFFER_SIZE  (2 * GiB)
  35 #else
  36 # define TCG_TARGET_REG_BITS  32
  37 # define TCG_TARGET_NB_REGS   24
  38 # define MAX_CODE_GEN_BUFFER_SIZE  UINT32_MAX
  39 #endif
  40
  41 typedef enum {
  42     TCG_REG_EAX = 0,
  43     TCG_REG_ECX,
  44     TCG_REG_EDX,
  45     TCG_REG_EBX,
  46     TCG_REG_ESP,
  47     TCG_REG_EBP,
  48     TCG_REG_ESI,
  49     TCG_REG_EDI,
  50
  51     /* 64-bit registers; always define the symbols to avoid
  52        too much if-deffing.  */
  53     TCG_REG_R8,
  54     TCG_REG_R9,
  55     TCG_REG_R10,
  56     TCG_REG_R11,
  57     TCG_REG_R12,
  58     TCG_REG_R13,
  59     TCG_REG_R14,
  60     TCG_REG_R15,
  61
  62     TCG_REG_XMM0,
  63     TCG_REG_XMM1,
  64     TCG_REG_XMM2,
  65     TCG_REG_XMM3,
  66     TCG_REG_XMM4,
  67     TCG_REG_XMM5,
  68     TCG_REG_XMM6,
  69     TCG_REG_XMM7,
  70
  71     /* 64-bit registers; likewise always define.  */
  72     TCG_REG_XMM8,
  73     TCG_REG_XMM9,
  74     TCG_REG_XMM10,
  75     TCG_REG_XMM11,
  76     TCG_REG_XMM12,
  77     TCG_REG_XMM13,
  78     TCG_REG_XMM14,
  79     TCG_REG_XMM15,
  80
  81     TCG_REG_RAX = TCG_REG_EAX,
  82     TCG_REG_RCX = TCG_REG_ECX,
  83     TCG_REG_RDX = TCG_REG_EDX,
  84     TCG_REG_RBX = TCG_REG_EBX,
  85     TCG_REG_RSP = TCG_REG_ESP,
  86     TCG_REG_RBP = TCG_REG_EBP,
  87     TCG_REG_RSI = TCG_REG_ESI,
  88     TCG_REG_RDI = TCG_REG_EDI,
  89
  90     TCG_AREG0 = TCG_REG_EBP,
  91     TCG_REG_CALL_STACK = TCG_REG_ESP
  92 } TCGReg;
  93
  94 /* used for function call generation */
  95 #define TCG_TARGET_STACK_ALIGN 16
  96 #if defined(_WIN64)
  97 #define TCG_TARGET_CALL_STACK_OFFSET 32
  98 #else
  99 #define TCG_TARGET_CALL_STACK_OFFSET 0
 100 #endif
 101
 102 extern bool have_bmi1;
 103 extern bool have_popcnt;
 104 extern bool have_avx1;
 105 extern bool have_avx2;
 106 extern bool have_movbe;
 107
 108 /* optional instructions */
 109 #define TCG_TARGET_HAS_div2_i32         1
 110 #define TCG_TARGET_HAS_rot_i32          1
 111 #define TCG_TARGET_HAS_ext8s_i32        1
 112 #define TCG_TARGET_HAS_ext16s_i32       1
 113 #define TCG_TARGET_HAS_ext8u_i32        1
 114 #define TCG_TARGET_HAS_ext16u_i32       1
 115 #define TCG_TARGET_HAS_bswap16_i32      1
 116 #define TCG_TARGET_HAS_bswap32_i32      1
 117 #define TCG_TARGET_HAS_neg_i32          1
 118 #define TCG_TARGET_HAS_not_i32          1
 119 #define TCG_TARGET_HAS_andc_i32         have_bmi1
 120 #define TCG_TARGET_HAS_orc_i32          0
 121 #define TCG_TARGET_HAS_eqv_i32          0
 122 #define TCG_TARGET_HAS_nand_i32         0
 123 #define TCG_TARGET_HAS_nor_i32          0
 124 #define TCG_TARGET_HAS_clz_i32          1
 125 #define TCG_TARGET_HAS_ctz_i32          1
 126 #define TCG_TARGET_HAS_ctpop_i32        have_popcnt
 127 #define TCG_TARGET_HAS_deposit_i32      1
 128 #define TCG_TARGET_HAS_extract_i32      1
 129 #define TCG_TARGET_HAS_sextract_i32     1
 130 #define TCG_TARGET_HAS_extract2_i32     1
 131 #define TCG_TARGET_HAS_movcond_i32      1
 132 #define TCG_TARGET_HAS_add2_i32         1
 133 #define TCG_TARGET_HAS_sub2_i32         1
 134 #define TCG_TARGET_HAS_mulu2_i32        1
 135 #define TCG_TARGET_HAS_muls2_i32        1
 136 #define TCG_TARGET_HAS_muluh_i32        0
 137 #define TCG_TARGET_HAS_mulsh_i32        0
 138 #define TCG_TARGET_HAS_direct_jump      1
 139
 140 #if TCG_TARGET_REG_BITS == 64
 141 /* Keep target addresses zero-extended in a register.  */
 142 #define TCG_TARGET_HAS_extrl_i64_i32    (TARGET_LONG_BITS == 32)
 143 #define TCG_TARGET_HAS_extrh_i64_i32    (TARGET_LONG_BITS == 32)
 144 #define TCG_TARGET_HAS_div2_i64         1
 145 #define TCG_TARGET_HAS_rot_i64          1
 146 #define TCG_TARGET_HAS_ext8s_i64        1
 147 #define TCG_TARGET_HAS_ext16s_i64       1
 148 #define TCG_TARGET_HAS_ext32s_i64       1
 149 #define TCG_TARGET_HAS_ext8u_i64        1
 150 #define TCG_TARGET_HAS_ext16u_i64       1
 151 #define TCG_TARGET_HAS_ext32u_i64       1
 152 #define TCG_TARGET_HAS_bswap16_i64      1
 153 #define TCG_TARGET_HAS_bswap32_i64      1
 154 #define TCG_TARGET_HAS_bswap64_i64      1
 155 #define TCG_TARGET_HAS_neg_i64          1
 156 #define TCG_TARGET_HAS_not_i64          1
 157 #define TCG_TARGET_HAS_andc_i64         have_bmi1
 158 #define TCG_TARGET_HAS_orc_i64          0
 159 #define TCG_TARGET_HAS_eqv_i64          0
 160 #define TCG_TARGET_HAS_nand_i64         0
 161 #define TCG_TARGET_HAS_nor_i64          0
 162 #define TCG_TARGET_HAS_clz_i64          1
 163 #define TCG_TARGET_HAS_ctz_i64          1
 164 #define TCG_TARGET_HAS_ctpop_i64        have_popcnt
 165 #define TCG_TARGET_HAS_deposit_i64      1
 166 #define TCG_TARGET_HAS_extract_i64      1
 167 #define TCG_TARGET_HAS_sextract_i64     0
 168 #define TCG_TARGET_HAS_extract2_i64     1
 169 #define TCG_TARGET_HAS_movcond_i64      1
 170 #define TCG_TARGET_HAS_add2_i64         1
 171 #define TCG_TARGET_HAS_sub2_i64         1
 172 #define TCG_TARGET_HAS_mulu2_i64        1
 173 #define TCG_TARGET_HAS_muls2_i64        1
 174 #define TCG_TARGET_HAS_muluh_i64        0
 175 #define TCG_TARGET_HAS_mulsh_i64        0
 176 #define TCG_TARGET_HAS_qemu_st8_i32     0
 177 #else
 178 #define TCG_TARGET_HAS_qemu_st8_i32     1
 179 #endif
 180
 181 /* We do not support older SSE systems, only beginning with AVX1.  */
 182 #define TCG_TARGET_HAS_v64              have_avx1
 183 #define TCG_TARGET_HAS_v128             have_avx1
 184 #define TCG_TARGET_HAS_v256             have_avx2
 185
 186 #define TCG_TARGET_HAS_andc_vec         1
 187 #define TCG_TARGET_HAS_orc_vec          0
 188 #define TCG_TARGET_HAS_not_vec          0
 189 #define TCG_TARGET_HAS_neg_vec          0
 190 #define TCG_TARGET_HAS_abs_vec          1
 191 #define TCG_TARGET_HAS_roti_vec         0
 192 #define TCG_TARGET_HAS_rots_vec         0
 193 #define TCG_TARGET_HAS_rotv_vec         0
 194 #define TCG_TARGET_HAS_shi_vec          1
 195 #define TCG_TARGET_HAS_shs_vec          1
 196 #define TCG_TARGET_HAS_shv_vec          have_avx2
 197 #define TCG_TARGET_HAS_mul_vec          1
 198 #define TCG_TARGET_HAS_sat_vec          1
 199 #define TCG_TARGET_HAS_minmax_vec       1
 200 #define TCG_TARGET_HAS_bitsel_vec       0
 201 #define TCG_TARGET_HAS_cmpsel_vec       -1
 202
 203 #define TCG_TARGET_deposit_i32_valid(ofs, len) \
 204     (((ofs) == 0 && (len) == 8) || ((ofs) == 8 && (len) == 8) || \
 205      ((ofs) == 0 && (len) == 16))
 206 #define TCG_TARGET_deposit_i64_valid    TCG_TARGET_deposit_i32_valid
 207
 208 /* Check for the possibility of high-byte extraction and, for 64-bit,
 209    zero-extending 32-bit right-shift.  */
 210 #define TCG_TARGET_extract_i32_valid(ofs, len) ((ofs) == 8 && (len) == 8)
 211 #define TCG_TARGET_extract_i64_valid(ofs, len) \
 212     (((ofs) == 8 && (len) == 8) || ((ofs) + (len)) == 32)
 213
 214 static inline void tb_target_set_jmp_target(uintptr_t tc_ptr, uintptr_t jmp_rx,
 215                                             uintptr_t jmp_rw, uintptr_t addr)
 216 {
 217     /* patch the branch destination */
 218     qatomic_set((int32_t *)jmp_rw, addr - (jmp_rx + 4));
 219     /* no need to flush icache explicitly */
 220 }
 221
 222 /* This defines the natural memory order supported by this
 223  * architecture before guarantees made by various barrier
 224  * instructions.
 225  *
 226  * The x86 has a pretty strong memory ordering which only really
 227  * allows for some stores to be re-ordered after loads.
 228  */
 229 #include "tcg/tcg-mo.h"
 230
 231 #define TCG_TARGET_DEFAULT_MO (TCG_MO_ALL & ~TCG_MO_ST_LD)
 232
 233 #define TCG_TARGET_HAS_MEMORY_BSWAP  have_movbe
 234
 235 #ifdef CONFIG_SOFTMMU
 236 #define TCG_TARGET_NEED_LDST_LABELS
 237 #endif
 238 #define TCG_TARGET_NEED_POOL_LABELS
 239
 240 #endif