| [2] | 1 | /* |
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| 2 | * Format of an instruction in memory. |
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| 3 | * |
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| 4 | * This file is subject to the terms and conditions of the GNU General Public |
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| 5 | * License. See the file "COPYING" in the main directory of this archive |
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| 6 | * for more details. |
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| 7 | * |
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| 8 | * Copyright (C) 1996, 2000 by Ralf Baechle |
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| 9 | */ |
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| 10 | #ifndef _ASM_INST_H |
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| 11 | #define _ASM_INST_H |
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| 12 | |
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| 13 | /* |
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| 14 | * Major opcodes; before MIPS IV cop1x was called cop3. |
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| 15 | */ |
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| 16 | enum major_op { |
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| 17 | spec_op, bcond_op, j_op, jal_op, |
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| 18 | beq_op, bne_op, blez_op, bgtz_op, |
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| 19 | addi_op, addiu_op, slti_op, sltiu_op, |
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| 20 | andi_op, ori_op, xori_op, lui_op, |
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| 21 | cop0_op, cop1_op, cop2_op, cop1x_op, |
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| 22 | beql_op, bnel_op, blezl_op, bgtzl_op, |
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| 23 | daddi_op, daddiu_op, ldl_op, ldr_op, |
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| 24 | major_1c_op, jalx_op, major_1e_op, major_1f_op, |
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| 25 | lb_op, lh_op, lwl_op, lw_op, |
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| 26 | lbu_op, lhu_op, lwr_op, lwu_op, |
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| 27 | sb_op, sh_op, swl_op, sw_op, |
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| 28 | sdl_op, sdr_op, swr_op, cache_op, |
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| 29 | ll_op, lwc1_op, lwc2_op, pref_op, |
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| 30 | lld_op, ldc1_op, ldc2_op, ld_op, |
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| 31 | sc_op, swc1_op, swc2_op, major_3b_op, /* Opcode 0x3b is unused */ |
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| 32 | scd_op, sdc1_op, sdc2_op, sd_op |
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| 33 | }; |
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| 34 | |
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| 35 | /* |
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| 36 | * func field of spec opcode. |
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| 37 | */ |
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| 38 | enum spec_op { |
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| 39 | sll_op, movc_op, srl_op, sra_op, |
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| 40 | sllv_op, srlv_op, srav_op, spec1_unused_op, /* Opcode 0x07 is unused */ |
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| 41 | jr_op, jalr_op, movz_op, movn_op, |
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| 42 | syscall_op, break_op, spim_op, sync_op, |
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| 43 | mfhi_op, mthi_op, mflo_op, mtlo_op, |
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| 44 | dsllv_op, spec2_unused_op, dsrlv_op, dsrav_op, |
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| 45 | mult_op, multu_op, div_op, divu_op, |
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| 46 | dmult_op, dmultu_op, ddiv_op, ddivu_op, |
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| 47 | add_op, addu_op, sub_op, subu_op, |
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| 48 | and_op, or_op, xor_op, nor_op, |
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| 49 | spec3_unused_op, spec4_unused_op, slt_op, sltu_op, |
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| 50 | dadd_op, daddu_op, dsub_op, dsubu_op, |
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| 51 | tge_op, tgeu_op, tlt_op, tltu_op, |
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| 52 | teq_op, spec5_unused_op, tne_op, spec6_unused_op, |
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| 53 | dsll_op, spec7_unused_op, dsrl_op, dsra_op, |
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| 54 | dsll32_op, spec8_unused_op, dsrl32_op, dsra32_op |
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| 55 | }; |
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| 56 | |
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| 57 | /* |
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| 58 | * rt field of bcond opcodes. |
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| 59 | */ |
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| 60 | enum rt_op { |
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| 61 | bltz_op, bgez_op, bltzl_op, bgezl_op, |
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| 62 | spimi_op, unused_rt_op_0x05, unused_rt_op_0x06, unused_rt_op_0x07, |
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| 63 | tgei_op, tgeiu_op, tlti_op, tltiu_op, |
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| 64 | teqi_op, unused_0x0d_rt_op, tnei_op, unused_0x0f_rt_op, |
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| 65 | bltzal_op, bgezal_op, bltzall_op, bgezall_op |
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| 66 | /* |
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| 67 | * The others (0x14 - 0x1f) are unused. |
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| 68 | */ |
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| 69 | }; |
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| 70 | |
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| 71 | /* |
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| 72 | * rs field of cop opcodes. |
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| 73 | */ |
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| 74 | enum cop_op { |
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| 75 | mfc_op = 0x00, dmfc_op = 0x01, |
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| 76 | cfc_op = 0x02, mtc_op = 0x04, |
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| 77 | dmtc_op = 0x05, ctc_op = 0x06, |
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| 78 | bc_op = 0x08, cop_op = 0x10, |
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| 79 | copm_op = 0x18 |
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| 80 | }; |
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| 81 | |
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| 82 | /* |
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| 83 | * rt field of cop.bc_op opcodes |
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| 84 | */ |
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| 85 | enum bcop_op { |
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| 86 | bcf_op, bct_op, bcfl_op, bctl_op |
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| 87 | }; |
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| 88 | |
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| 89 | /* |
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| 90 | * func field of cop0 coi opcodes. |
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| 91 | */ |
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| 92 | enum cop0_coi_func { |
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| 93 | tlbr_op = 0x01, tlbwi_op = 0x02, |
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| 94 | tlbwr_op = 0x06, tlbp_op = 0x08, |
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| 95 | rfe_op = 0x10, eret_op = 0x18 |
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| 96 | }; |
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| 97 | |
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| 98 | /* |
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| 99 | * func field of cop0 com opcodes. |
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| 100 | */ |
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| 101 | enum cop0_com_func { |
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| 102 | tlbr1_op = 0x01, tlbw_op = 0x02, |
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| 103 | tlbp1_op = 0x08, dctr_op = 0x09, |
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| 104 | dctw_op = 0x0a |
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| 105 | }; |
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| 106 | |
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| 107 | /* |
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| 108 | * fmt field of cop1 opcodes. |
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| 109 | */ |
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| 110 | enum cop1_fmt { |
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| 111 | s_fmt, d_fmt, e_fmt, q_fmt, |
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| 112 | w_fmt, l_fmt |
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| 113 | }; |
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| 114 | |
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| 115 | /* |
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| 116 | * func field of cop1 instructions using d, s or w format. |
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| 117 | */ |
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| 118 | enum cop1_sdw_func { |
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| 119 | fadd_op = 0x00, fsub_op = 0x01, |
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| 120 | fmul_op = 0x02, fdiv_op = 0x03, |
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| 121 | fsqrt_op = 0x04, fabs_op = 0x05, |
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| 122 | fmov_op = 0x06, fneg_op = 0x07, |
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| 123 | froundl_op = 0x08, ftruncl_op = 0x09, |
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| 124 | fceill_op = 0x0a, ffloorl_op = 0x0b, |
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| 125 | fround_op = 0x0c, ftrunc_op = 0x0d, |
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| 126 | fceil_op = 0x0e, ffloor_op = 0x0f, |
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| 127 | fmovc_op = 0x11, fmovz_op = 0x12, |
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| 128 | fmovn_op = 0x13, frecip_op = 0x15, |
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| 129 | frsqrt_op = 0x16, fcvts_op = 0x20, |
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| 130 | fcvtd_op = 0x21, fcvte_op = 0x22, |
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| 131 | fcvtw_op = 0x24, fcvtl_op = 0x25, |
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| 132 | fcmp_op = 0x30 |
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| 133 | }; |
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| 134 | |
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| 135 | /* |
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| 136 | * func field of cop1x opcodes (MIPS IV). |
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| 137 | */ |
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| 138 | enum cop1x_func { |
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| 139 | lwxc1_op = 0x00, ldxc1_op = 0x01, |
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| 140 | pfetch_op = 0x07, swxc1_op = 0x08, |
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| 141 | sdxc1_op = 0x09, madd_s_op = 0x20, |
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| 142 | madd_d_op = 0x21, madd_e_op = 0x22, |
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| 143 | msub_s_op = 0x28, msub_d_op = 0x29, |
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| 144 | msub_e_op = 0x2a, nmadd_s_op = 0x30, |
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| 145 | nmadd_d_op = 0x31, nmadd_e_op = 0x32, |
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| 146 | nmsub_s_op = 0x38, nmsub_d_op = 0x39, |
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| 147 | nmsub_e_op = 0x3a |
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| 148 | }; |
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| 149 | |
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| 150 | /* |
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| 151 | * func field for mad opcodes (MIPS IV). |
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| 152 | */ |
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| 153 | enum mad_func { |
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| 154 | madd_op = 0x08, msub_op = 0x0a, |
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| 155 | nmadd_op = 0x0c, nmsub_op = 0x0e |
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| 156 | }; |
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| 157 | |
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| 158 | /* |
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| 159 | * Damn ... bitfields depend from byteorder :-( |
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| 160 | */ |
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| 161 | #ifdef __MIPSEB__ |
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| 162 | struct j_format { /* Jump format */ |
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| 163 | unsigned int opcode : 6; |
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| 164 | unsigned int target : 26; |
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| 165 | }; |
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| 166 | |
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| 167 | struct i_format { /* Immediate format (addi, lw, ...) */ |
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| 168 | unsigned int opcode : 6; |
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| 169 | unsigned int rs : 5; |
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| 170 | unsigned int rt : 5; |
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| 171 | signed int simmediate : 16; |
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| 172 | }; |
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| 173 | |
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| 174 | struct u_format { /* Unsigned immediate format (ori, xori, ...) */ |
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| 175 | unsigned int opcode : 6; |
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| 176 | unsigned int rs : 5; |
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| 177 | unsigned int rt : 5; |
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| 178 | unsigned int uimmediate : 16; |
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| 179 | }; |
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| 180 | |
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| 181 | struct c_format { /* Cache (>= R6000) format */ |
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| 182 | unsigned int opcode : 6; |
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| 183 | unsigned int rs : 5; |
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| 184 | unsigned int c_op : 3; |
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| 185 | unsigned int cache : 2; |
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| 186 | unsigned int simmediate : 16; |
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| 187 | }; |
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| 188 | |
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| 189 | struct r_format { /* Register format */ |
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| 190 | unsigned int opcode : 6; |
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| 191 | unsigned int rs : 5; |
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| 192 | unsigned int rt : 5; |
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| 193 | unsigned int rd : 5; |
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| 194 | unsigned int re : 5; |
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| 195 | unsigned int func : 6; |
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| 196 | }; |
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| 197 | |
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| 198 | struct p_format { /* Performance counter format (R10000) */ |
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| 199 | unsigned int opcode : 6; |
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| 200 | unsigned int rs : 5; |
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| 201 | unsigned int rt : 5; |
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| 202 | unsigned int rd : 5; |
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| 203 | unsigned int re : 5; |
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| 204 | unsigned int func : 6; |
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| 205 | }; |
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| 206 | |
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| 207 | struct f_format { /* FPU register format */ |
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| 208 | unsigned int opcode : 6; |
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| 209 | unsigned int : 1; |
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| 210 | unsigned int fmt : 4; |
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| 211 | unsigned int rt : 5; |
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| 212 | unsigned int rd : 5; |
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| 213 | unsigned int re : 5; |
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| 214 | unsigned int func : 6; |
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| 215 | }; |
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| 216 | |
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| 217 | struct ma_format { /* FPU multipy and add format (MIPS IV) */ |
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| 218 | unsigned int opcode : 6; |
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| 219 | unsigned int fr : 5; |
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| 220 | unsigned int ft : 5; |
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| 221 | unsigned int fs : 5; |
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| 222 | unsigned int fd : 5; |
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| 223 | unsigned int func : 4; |
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| 224 | unsigned int fmt : 2; |
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| 225 | }; |
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| 226 | |
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| 227 | #elif defined(__MIPSEL__) |
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| 228 | |
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| 229 | struct j_format { /* Jump format */ |
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| 230 | unsigned int target : 26; |
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| 231 | unsigned int opcode : 6; |
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| 232 | }; |
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| 233 | |
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| 234 | struct i_format { /* Immediate format */ |
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| 235 | signed int simmediate : 16; |
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| 236 | unsigned int rt : 5; |
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| 237 | unsigned int rs : 5; |
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| 238 | unsigned int opcode : 6; |
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| 239 | }; |
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| 240 | |
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| 241 | struct u_format { /* Unsigned immediate format */ |
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| 242 | unsigned int uimmediate : 16; |
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| 243 | unsigned int rt : 5; |
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| 244 | unsigned int rs : 5; |
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| 245 | unsigned int opcode : 6; |
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| 246 | }; |
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| 247 | |
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| 248 | struct c_format { /* Cache (>= R6000) format */ |
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| 249 | unsigned int simmediate : 16; |
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| 250 | unsigned int cache : 2; |
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| 251 | unsigned int c_op : 3; |
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| 252 | unsigned int rs : 5; |
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| 253 | unsigned int opcode : 6; |
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| 254 | }; |
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| 255 | |
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| 256 | struct r_format { /* Register format */ |
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| 257 | unsigned int func : 6; |
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| 258 | unsigned int re : 5; |
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| 259 | unsigned int rd : 5; |
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| 260 | unsigned int rt : 5; |
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| 261 | unsigned int rs : 5; |
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| 262 | unsigned int opcode : 6; |
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| 263 | }; |
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| 264 | |
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| 265 | struct p_format { /* Performance counter format (R10000) */ |
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| 266 | unsigned int func : 6; |
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| 267 | unsigned int re : 5; |
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| 268 | unsigned int rd : 5; |
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| 269 | unsigned int rt : 5; |
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| 270 | unsigned int rs : 5; |
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| 271 | unsigned int opcode : 6; |
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| 272 | }; |
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| 273 | |
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| 274 | struct f_format { /* FPU register format */ |
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| 275 | unsigned int func : 6; |
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| 276 | unsigned int re : 5; |
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| 277 | unsigned int rd : 5; |
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| 278 | unsigned int rt : 5; |
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| 279 | unsigned int fmt : 4; |
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| 280 | unsigned int : 1; |
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| 281 | unsigned int opcode : 6; |
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| 282 | }; |
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| 283 | |
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| 284 | struct ma_format { /* FPU multipy and add format (MIPS IV) */ |
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| 285 | unsigned int fmt : 2; |
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| 286 | unsigned int func : 4; |
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| 287 | unsigned int fd : 5; |
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| 288 | unsigned int fs : 5; |
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| 289 | unsigned int ft : 5; |
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| 290 | unsigned int fr : 5; |
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| 291 | unsigned int opcode : 6; |
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| 292 | }; |
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| 293 | |
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| 294 | #else /* !defined (__MIPSEB__) && !defined (__MIPSEL__) */ |
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| 295 | #error "MIPS but neither __MIPSEL__ nor __MIPSEB__?" |
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| 296 | #endif |
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| 297 | |
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| 298 | union mips_instruction { |
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| 299 | unsigned int word; |
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| 300 | unsigned short halfword[2]; |
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| 301 | unsigned char byte[4]; |
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| 302 | struct j_format j_format; |
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| 303 | struct i_format i_format; |
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| 304 | struct u_format u_format; |
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| 305 | struct c_format c_format; |
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| 306 | struct r_format r_format; |
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| 307 | struct f_format f_format; |
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| 308 | struct ma_format ma_format; |
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| 309 | }; |
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| 310 | |
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| 311 | /* HACHACHAHCAHC ... */ |
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| 312 | |
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| 313 | /* In case some other massaging is needed, keep MIPSInst as wrapper */ |
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| 314 | |
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| 315 | #define MIPSInst(x) x |
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| 316 | |
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| 317 | #define I_OPCODE_SFT 26 |
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| 318 | #define MIPSInst_OPCODE(x) (MIPSInst(x) >> I_OPCODE_SFT) |
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| 319 | |
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| 320 | #define I_JTARGET_SFT 0 |
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| 321 | #define MIPSInst_JTARGET(x) (MIPSInst(x) & 0x03ffffff) |
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| 322 | |
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| 323 | #define I_RS_SFT 21 |
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| 324 | #define MIPSInst_RS(x) ((MIPSInst(x) & 0x03e00000) >> I_RS_SFT) |
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| 325 | |
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| 326 | #define I_RT_SFT 16 |
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| 327 | #define MIPSInst_RT(x) ((MIPSInst(x) & 0x001f0000) >> I_RT_SFT) |
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| 328 | |
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| 329 | #define I_IMM_SFT 0 |
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| 330 | #define MIPSInst_SIMM(x) ((int)((short)(MIPSInst(x) & 0xffff))) |
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| 331 | #define MIPSInst_UIMM(x) (MIPSInst(x) & 0xffff) |
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| 332 | |
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| 333 | #define I_CACHEOP_SFT 18 |
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| 334 | #define MIPSInst_CACHEOP(x) ((MIPSInst(x) & 0x001c0000) >> I_CACHEOP_SFT) |
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| 335 | |
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| 336 | #define I_CACHESEL_SFT 16 |
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| 337 | #define MIPSInst_CACHESEL(x) ((MIPSInst(x) & 0x00030000) >> I_CACHESEL_SFT) |
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| 338 | |
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| 339 | #define I_RD_SFT 11 |
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| 340 | #define MIPSInst_RD(x) ((MIPSInst(x) & 0x0000f800) >> I_RD_SFT) |
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| 341 | |
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| 342 | #define I_RE_SFT 6 |
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| 343 | #define MIPSInst_RE(x) ((MIPSInst(x) & 0x000007c0) >> I_RE_SFT) |
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| 344 | |
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| 345 | #define I_FUNC_SFT 0 |
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| 346 | #define MIPSInst_FUNC(x) (MIPSInst(x) & 0x0000003f) |
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| 347 | |
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| 348 | #define I_FFMT_SFT 21 |
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| 349 | #define MIPSInst_FFMT(x) ((MIPSInst(x) & 0x01e00000) >> I_FFMT_SFT) |
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| 350 | |
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| 351 | #define I_FT_SFT 16 |
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| 352 | #define MIPSInst_FT(x) ((MIPSInst(x) & 0x001f0000) >> I_FT_SFT) |
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| 353 | |
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| 354 | #define I_FS_SFT 11 |
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| 355 | #define MIPSInst_FS(x) ((MIPSInst(x) & 0x0000f800) >> I_FS_SFT) |
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| 356 | |
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| 357 | #define I_FD_SFT 6 |
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| 358 | #define MIPSInst_FD(x) ((MIPSInst(x) & 0x000007c0) >> I_FD_SFT) |
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| 359 | |
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| 360 | #define I_FR_SFT 21 |
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| 361 | #define MIPSInst_FR(x) ((MIPSInst(x) & 0x03e00000) >> I_FR_SFT) |
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| 362 | |
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| 363 | #define I_FMA_FUNC_SFT 2 |
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| 364 | #define MIPSInst_FMA_FUNC(x) ((MIPSInst(x) & 0x0000003c) >> I_FMA_FUNC_SFT) |
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| 365 | |
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| 366 | #define I_FMA_FFMT_SFT 0 |
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| 367 | #define MIPSInst_FMA_FFMT(x) (MIPSInst(x) & 0x00000003) |
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| 368 | |
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| 369 | typedef unsigned int mips_instruction; |
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| 370 | |
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| 371 | #endif /* _ASM_INST_H */ |
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