1 /* 2 * Tiny Code Generator for QEMU 3 * 4 * Copyright (c) 2009, 2011 Stefan Weil 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 /* 26 * This code implements a TCG which does not generate machine code for some 27 * real target machine but which generates virtual machine code for an 28 * interpreter. Interpreted pseudo code is slow, but it works on any host. 29 * 30 * Some remarks might help in understanding the code: 31 * 32 * "target" or "TCG target" is the machine which runs the generated code. 33 * This is different to the usual meaning in QEMU where "target" is the 34 * emulated machine. So normally QEMU host is identical to TCG target. 35 * Here the TCG target is a virtual machine, but this virtual machine must 36 * use the same word size like the real machine. 37 * Therefore, we need both 32 and 64 bit virtual machines (interpreter). 38 */ 39 40 #ifndef TCG_TARGET_H 41 #define TCG_TARGET_H 42 43 #define TCG_TARGET_INTERPRETER 1 44 #define TCG_TARGET_INSN_UNIT_SIZE 4 45 #define MAX_CODE_GEN_BUFFER_SIZE ((size_t)-1) 46 47 /* Optional instructions. */ 48 49 #define TCG_TARGET_HAS_bswap16_i32 1 50 #define TCG_TARGET_HAS_bswap32_i32 1 51 #define TCG_TARGET_HAS_div_i32 1 52 #define TCG_TARGET_HAS_rem_i32 1 53 #define TCG_TARGET_HAS_ext8s_i32 1 54 #define TCG_TARGET_HAS_ext16s_i32 1 55 #define TCG_TARGET_HAS_ext8u_i32 1 56 #define TCG_TARGET_HAS_ext16u_i32 1 57 #define TCG_TARGET_HAS_andc_i32 1 58 #define TCG_TARGET_HAS_deposit_i32 1 59 #define TCG_TARGET_HAS_extract_i32 1 60 #define TCG_TARGET_HAS_sextract_i32 1 61 #define TCG_TARGET_HAS_extract2_i32 0 62 #define TCG_TARGET_HAS_eqv_i32 1 63 #define TCG_TARGET_HAS_nand_i32 1 64 #define TCG_TARGET_HAS_nor_i32 1 65 #define TCG_TARGET_HAS_clz_i32 1 66 #define TCG_TARGET_HAS_ctz_i32 1 67 #define TCG_TARGET_HAS_ctpop_i32 1 68 #define TCG_TARGET_HAS_not_i32 1 69 #define TCG_TARGET_HAS_orc_i32 1 70 #define TCG_TARGET_HAS_rot_i32 1 71 #define TCG_TARGET_HAS_negsetcond_i32 0 72 #define TCG_TARGET_HAS_muls2_i32 1 73 #define TCG_TARGET_HAS_muluh_i32 0 74 #define TCG_TARGET_HAS_mulsh_i32 0 75 #define TCG_TARGET_HAS_qemu_st8_i32 0 76 77 #if TCG_TARGET_REG_BITS == 64 78 #define TCG_TARGET_HAS_extr_i64_i32 0 79 #define TCG_TARGET_HAS_bswap16_i64 1 80 #define TCG_TARGET_HAS_bswap32_i64 1 81 #define TCG_TARGET_HAS_bswap64_i64 1 82 #define TCG_TARGET_HAS_deposit_i64 1 83 #define TCG_TARGET_HAS_extract_i64 1 84 #define TCG_TARGET_HAS_sextract_i64 1 85 #define TCG_TARGET_HAS_extract2_i64 0 86 #define TCG_TARGET_HAS_div_i64 1 87 #define TCG_TARGET_HAS_rem_i64 1 88 #define TCG_TARGET_HAS_ext8s_i64 1 89 #define TCG_TARGET_HAS_ext16s_i64 1 90 #define TCG_TARGET_HAS_ext32s_i64 1 91 #define TCG_TARGET_HAS_ext8u_i64 1 92 #define TCG_TARGET_HAS_ext16u_i64 1 93 #define TCG_TARGET_HAS_ext32u_i64 1 94 #define TCG_TARGET_HAS_andc_i64 1 95 #define TCG_TARGET_HAS_eqv_i64 1 96 #define TCG_TARGET_HAS_nand_i64 1 97 #define TCG_TARGET_HAS_nor_i64 1 98 #define TCG_TARGET_HAS_clz_i64 1 99 #define TCG_TARGET_HAS_ctz_i64 1 100 #define TCG_TARGET_HAS_ctpop_i64 1 101 #define TCG_TARGET_HAS_not_i64 1 102 #define TCG_TARGET_HAS_orc_i64 1 103 #define TCG_TARGET_HAS_rot_i64 1 104 #define TCG_TARGET_HAS_negsetcond_i64 0 105 #define TCG_TARGET_HAS_muls2_i64 1 106 #define TCG_TARGET_HAS_add2_i32 1 107 #define TCG_TARGET_HAS_sub2_i32 1 108 #define TCG_TARGET_HAS_mulu2_i32 1 109 #define TCG_TARGET_HAS_add2_i64 1 110 #define TCG_TARGET_HAS_sub2_i64 1 111 #define TCG_TARGET_HAS_mulu2_i64 1 112 #define TCG_TARGET_HAS_muluh_i64 0 113 #define TCG_TARGET_HAS_mulsh_i64 0 114 #else 115 #define TCG_TARGET_HAS_mulu2_i32 1 116 #endif /* TCG_TARGET_REG_BITS == 64 */ 117 118 #define TCG_TARGET_HAS_qemu_ldst_i128 0 119 120 /* Number of registers available. */ 121 #define TCG_TARGET_NB_REGS 16 122 123 /* List of registers which are used by TCG. */ 124 typedef enum { 125 TCG_REG_R0 = 0, 126 TCG_REG_R1, 127 TCG_REG_R2, 128 TCG_REG_R3, 129 TCG_REG_R4, 130 TCG_REG_R5, 131 TCG_REG_R6, 132 TCG_REG_R7, 133 TCG_REG_R8, 134 TCG_REG_R9, 135 TCG_REG_R10, 136 TCG_REG_R11, 137 TCG_REG_R12, 138 TCG_REG_R13, 139 TCG_REG_R14, 140 TCG_REG_R15, 141 142 TCG_REG_TMP = TCG_REG_R13, 143 TCG_AREG0 = TCG_REG_R14, 144 TCG_REG_CALL_STACK = TCG_REG_R15, 145 } TCGReg; 146 147 /* Used for function call generation. */ 148 #define TCG_TARGET_CALL_STACK_OFFSET 0 149 #define TCG_TARGET_STACK_ALIGN 8 150 #if TCG_TARGET_REG_BITS == 32 151 # define TCG_TARGET_CALL_ARG_I32 TCG_CALL_ARG_EVEN 152 # define TCG_TARGET_CALL_ARG_I64 TCG_CALL_ARG_EVEN 153 # define TCG_TARGET_CALL_ARG_I128 TCG_CALL_ARG_EVEN 154 #else 155 # define TCG_TARGET_CALL_ARG_I32 TCG_CALL_ARG_NORMAL 156 # define TCG_TARGET_CALL_ARG_I64 TCG_CALL_ARG_NORMAL 157 # define TCG_TARGET_CALL_ARG_I128 TCG_CALL_ARG_NORMAL 158 #endif 159 #define TCG_TARGET_CALL_RET_I128 TCG_CALL_RET_NORMAL 160 161 #define HAVE_TCG_QEMU_TB_EXEC 162 #define TCG_TARGET_NEED_POOL_LABELS 163 164 /* We could notice __i386__ or __s390x__ and reduce the barriers depending 165 on the host. But if you want performance, you use the normal backend. 166 We prefer consistency across hosts on this. */ 167 #define TCG_TARGET_DEFAULT_MO (0) 168 169 #endif /* TCG_TARGET_H */ 170