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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1126 | savelij | 1 | /* codepps4.c */ |
| 2 | /*****************************************************************************/ |
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| 3 | /* SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only */ |
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| 4 | /* */ |
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| 5 | /* AS */ |
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| 6 | /* */ |
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| 7 | /* Code Generator Rockwell PPS-4 */ |
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| 8 | /* */ |
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| 9 | /*****************************************************************************/ |
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| 10 | |||
| 11 | #include "stdinc.h" |
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| 12 | |||
| 13 | #include <string.h> |
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| 14 | #include <ctype.h> |
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| 15 | |||
| 16 | #include "bpemu.h" |
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| 17 | #include "asmdef.h" |
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| 18 | #include "asmsub.h" |
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| 19 | #include "asmpars.h" |
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| 20 | #include "headids.h" |
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| 21 | #include "asmitree.h" |
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| 22 | #include "codevars.h" |
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| 23 | #include "asmerr.h" |
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| 24 | #include "errmsg.h" |
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| 25 | #include "fourpseudo.h" |
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| 26 | |||
| 27 | #include "codepps4.h" |
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| 28 | |||
| 29 | /*---------------------------------------------------------------------------*/ |
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| 30 | /* Instruction Decoders */ |
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| 31 | |||
| 32 | /*!------------------------------------------------------------------------ |
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| 33 | * \fn decode_fixed(Word code) |
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| 34 | * \brief handle instructions with no argument |
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| 35 | * \param code machine code |
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| 36 | * ------------------------------------------------------------------------ */ |
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| 37 | |||
| 38 | static void decode_fixed(Word code) |
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| 39 | { |
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| 40 | if (ChkArgCnt(0, 0)) |
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| 41 | { |
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| 42 | BAsmCode[0] = code; |
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| 43 | CodeLen = 1; |
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| 44 | } |
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| 45 | } |
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| 46 | |||
| 47 | /*!------------------------------------------------------------------------ |
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| 48 | * \fn decode_adi(Word code) |
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| 49 | * \brief handle ADI instruction |
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| 50 | * \param code machine code |
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| 51 | * ------------------------------------------------------------------------ */ |
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| 52 | |||
| 53 | static void decode_adi(Word code) |
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| 54 | { |
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| 55 | if (ChkArgCnt(1, 1)) |
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| 56 | { |
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| 57 | tEvalResult eval_result; |
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| 58 | Byte value = EvalStrIntExpressionWithResult(&ArgStr[1], Int4, &eval_result); |
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| 59 | |||
| 60 | if (eval_result.OK) |
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| 61 | { |
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| 62 | /* I am not 100% sure I have to insert one's complement of the |
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| 63 | value into the instruction. But this way, it makes most sense: */ |
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| 64 | |||
| 65 | if (mFirstPassUnknownOrQuestionable(eval_result.Flags)) |
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| 66 | value = 15; |
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| 67 | value = ~value & 15; |
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| 68 | if ((value == 15) || (value == 5)) |
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| 69 | WrStrErrorPos(ErrNum_InvArg, &ArgStr[1]); |
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| 70 | else |
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| 71 | { |
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| 72 | BAsmCode[0] = code | value; |
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| 73 | CodeLen = 1; |
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| 74 | } |
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| 75 | } |
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| 76 | } |
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| 77 | } |
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| 78 | |||
| 79 | /*!------------------------------------------------------------------------ |
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| 80 | * \fn decode_imm_3(Word code) |
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| 81 | * \brief handle instructions with 3 bit immediate operand |
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| 82 | * \param code machine code |
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| 83 | * ------------------------------------------------------------------------ */ |
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| 84 | |||
| 85 | static void decode_imm_3(Word code) |
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| 86 | { |
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| 87 | if (ChkArgCnt(1, 1)) |
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| 88 | { |
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| 89 | Boolean ok; |
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| 90 | |||
| 91 | BAsmCode[0] = EvalStrIntExpression(&ArgStr[1], UInt3, &ok); |
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| 92 | if (ok) |
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| 93 | { |
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| 94 | BAsmCode[0] = code | (BAsmCode[0] & 0x07); |
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| 95 | CodeLen = 1; |
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| 96 | } |
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| 97 | } |
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| 98 | } |
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| 99 | |||
| 100 | /*!------------------------------------------------------------------------ |
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| 101 | * \fn decode_imm_4(Word code) |
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| 102 | * \brief handle instructions with 4 bit immediate operand |
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| 103 | * \param code machine code |
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| 104 | * ------------------------------------------------------------------------ */ |
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| 105 | |||
| 106 | static void decode_imm_4(Word code) |
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| 107 | { |
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| 108 | if (ChkArgCnt(1, 1)) |
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| 109 | { |
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| 110 | Boolean ok; |
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| 111 | |||
| 112 | BAsmCode[0] = EvalStrIntExpression(&ArgStr[1], UInt4, &ok); |
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| 113 | if (ok) |
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| 114 | { |
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| 115 | BAsmCode[0] = code | (BAsmCode[0] & 0x0f); |
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| 116 | CodeLen = 1; |
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| 117 | } |
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| 118 | } |
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| 119 | } |
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| 120 | |||
| 121 | /*!------------------------------------------------------------------------ |
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| 122 | * \fn decode_imm_8(Word code) |
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| 123 | * \brief handle instructions with 8 bit immediate operand |
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| 124 | * \param code machine code |
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| 125 | * ------------------------------------------------------------------------ */ |
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| 126 | |||
| 127 | static void decode_imm_8(Word code) |
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| 128 | { |
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| 129 | if (ChkArgCnt(1, 1)) |
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| 130 | { |
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| 131 | Boolean ok; |
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| 132 | |||
| 133 | BAsmCode[1] = EvalStrIntExpression(&ArgStr[1], Int8, &ok); |
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| 134 | if (ok) |
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| 135 | { |
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| 136 | BAsmCode[0] = code; |
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| 137 | CodeLen = 2; |
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| 138 | } |
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| 139 | } |
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| 140 | } |
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| 141 | |||
| 142 | /*!------------------------------------------------------------------------ |
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| 143 | * \fn decode_t(Word code) |
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| 144 | * \brief handle T instruction |
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| 145 | * \param code machine code |
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| 146 | * ------------------------------------------------------------------------ */ |
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| 147 | |||
| 148 | static void decode_t(Word code) |
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| 149 | { |
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| 150 | if (ChkArgCnt(1, 1)) |
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| 151 | { |
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| 152 | tEvalResult eval_result; |
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| 153 | Word address = EvalStrIntExpressionWithResult(&ArgStr[1], UInt12, &eval_result); |
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| 154 | |||
| 155 | if (eval_result.OK |
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| 156 | && ChkSamePage(EProgCounter(), address, 6, eval_result.Flags)) |
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| 157 | { |
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| 158 | ChkSpace(SegCode, eval_result.AddrSpaceMask); |
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| 159 | BAsmCode[0] = code | (address & 63); |
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| 160 | CodeLen = 1; |
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| 161 | } |
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| 162 | } |
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| 163 | } |
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| 164 | |||
| 165 | /*!------------------------------------------------------------------------ |
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| 166 | * \fn decode_tm(Word code) |
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| 167 | * \brief handle TM instruction |
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| 168 | * \param code machine code |
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| 169 | * ------------------------------------------------------------------------ */ |
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| 170 | |||
| 171 | static void decode_tm(Word code) |
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| 172 | { |
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| 173 | if (ChkArgCnt(1, 1)) |
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| 174 | { |
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| 175 | tEvalResult eval_result; |
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| 176 | Word address = EvalStrIntExpressionWithResult(&ArgStr[1], UInt12, &eval_result); |
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| 177 | |||
| 178 | /* A lower address byte fron locations 0xd0...0xff is accessed, with |
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| 179 | bits 11:8 set to 0x1. We check for a correct vector address: */ |
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| 180 | |||
| 181 | if (eval_result.OK) |
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| 182 | { |
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| 183 | ChkSpace(SegCode, eval_result.AddrSpaceMask); |
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| 184 | if (mFirstPassUnknownOrQuestionable(eval_result.Flags)) |
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| 185 | address = (address & 0x00f) | 0x0d0; |
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| 186 | if (ChkRange(address, 0xd0, 0xff)) |
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| 187 | { |
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| 188 | BAsmCode[0] = code | (address & 0x3f); |
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| 189 | CodeLen = 1; |
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| 190 | } |
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| 191 | } |
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| 192 | } |
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| 193 | } |
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| 194 | |||
| 195 | /*!------------------------------------------------------------------------ |
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| 196 | * \fn decode_tl(Word code) |
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| 197 | * \brief handle TL instruction |
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| 198 | * \param code machine code |
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| 199 | * ------------------------------------------------------------------------ */ |
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| 200 | |||
| 201 | static void decode_tl(Word code) |
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| 202 | { |
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| 203 | if (ChkArgCnt(1, 1)) |
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| 204 | { |
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| 205 | tEvalResult eval_result; |
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| 206 | Word address = EvalStrIntExpressionWithResult(&ArgStr[1], UInt12, &eval_result); |
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| 207 | |||
| 208 | if (eval_result.OK) |
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| 209 | { |
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| 210 | ChkSpace(SegCode, eval_result.AddrSpaceMask); |
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| 211 | BAsmCode[0] = code | (Hi(address) & 15); |
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| 212 | BAsmCode[1] = Lo(address); |
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| 213 | CodeLen = 2; |
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| 214 | } |
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| 215 | } |
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| 216 | } |
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| 217 | |||
| 218 | /*!------------------------------------------------------------------------ |
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| 219 | * \fn decode_tml(Word code) |
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| 220 | * \brief handle TML instruction |
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| 221 | * \param code machine code |
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| 222 | * ------------------------------------------------------------------------ */ |
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| 223 | |||
| 224 | static void decode_tml(Word code) |
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| 225 | { |
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| 226 | if (ChkArgCnt(1, 1)) |
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| 227 | { |
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| 228 | tEvalResult eval_result; |
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| 229 | Word address = EvalStrIntExpressionWithResult(&ArgStr[1], UInt12, &eval_result); |
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| 230 | |||
| 231 | if (eval_result.OK) |
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| 232 | { |
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| 233 | ChkSpace(SegCode, eval_result.AddrSpaceMask); |
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| 234 | if (mFirstPassUnknownOrQuestionable(eval_result.Flags)) |
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| 235 | address = (address & 0x0ff) | 0x100; |
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| 236 | if (ChkRange(address, 0x100, 0x3ff)) |
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| 237 | { |
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| 238 | BAsmCode[0] = code | (Hi(address) & 0x03); |
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| 239 | BAsmCode[1] = Lo(address); |
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| 240 | CodeLen = 2; |
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| 241 | } |
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| 242 | } |
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| 243 | } |
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| 244 | } |
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| 245 | |||
| 246 | /*!------------------------------------------------------------------------ |
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| 247 | * \fn decode_data_pps4(Word code) |
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| 248 | * \brief handle DATA instruction |
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| 249 | * ------------------------------------------------------------------------ */ |
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| 250 | |||
| 251 | static void decode_data_pps4(Word code) |
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| 252 | { |
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| 253 | UNUSED(code); |
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| 254 | |||
| 255 | DecodeDATA(Int8, Int4); |
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| 256 | } |
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| 257 | |||
| 258 | /*---------------------------------------------------------------------------*/ |
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| 259 | /* Code Table Handling */ |
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| 260 | |||
| 261 | /*!------------------------------------------------------------------------ |
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| 262 | * \fn init_fields(void) |
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| 263 | * \brief build up instruction hash table |
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| 264 | * ------------------------------------------------------------------------ */ |
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| 265 | |||
| 266 | static void init_fields(void) |
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| 267 | { |
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| 268 | InstTable = CreateInstTable(101); |
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| 269 | |||
| 270 | AddInstTable(InstTable, "AD" , 0x0b, decode_fixed); |
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| 271 | AddInstTable(InstTable, "ADC" , 0x0a, decode_fixed); |
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| 272 | AddInstTable(InstTable, "ADSK" , 0x09, decode_fixed); |
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| 273 | AddInstTable(InstTable, "ADCSK", 0x08, decode_fixed); |
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| 274 | AddInstTable(InstTable, "DC" , 0x65, decode_fixed); |
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| 275 | AddInstTable(InstTable, "AND" , 0x0d, decode_fixed); |
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| 276 | AddInstTable(InstTable, "OR" , 0x0f, decode_fixed); |
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| 277 | AddInstTable(InstTable, "EOR" , 0x0c, decode_fixed); |
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| 278 | AddInstTable(InstTable, "COMP" , 0x0e, decode_fixed); |
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| 279 | AddInstTable(InstTable, "SC" , 0x20, decode_fixed); |
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| 280 | AddInstTable(InstTable, "RC" , 0x24, decode_fixed); |
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| 281 | AddInstTable(InstTable, "SF1" , 0x22, decode_fixed); |
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| 282 | AddInstTable(InstTable, "RF1" , 0x26, decode_fixed); |
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| 283 | AddInstTable(InstTable, "SF2" , 0x21, decode_fixed); |
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| 284 | AddInstTable(InstTable, "RF2" , 0x25, decode_fixed); |
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| 285 | AddInstTable(InstTable, "LAX" , 0x12, decode_fixed); |
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| 286 | AddInstTable(InstTable, "LXA" , 0x1b, decode_fixed); |
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| 287 | AddInstTable(InstTable, "LABL" , 0x11, decode_fixed); |
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| 288 | AddInstTable(InstTable, "LBMX" , 0x10, decode_fixed); |
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| 289 | AddInstTable(InstTable, "LBUA" , 0x04, decode_fixed); |
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| 290 | AddInstTable(InstTable, "XABL" , 0x19, decode_fixed); |
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| 291 | AddInstTable(InstTable, "XBMX" , 0x18, decode_fixed); |
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| 292 | AddInstTable(InstTable, "XAX" , 0x1a, decode_fixed); |
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| 293 | AddInstTable(InstTable, "XS" , 0x06, decode_fixed); |
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| 294 | AddInstTable(InstTable, "CYS" , 0x6f, decode_fixed); |
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| 295 | AddInstTable(InstTable, "INCB" , 0x17, decode_fixed); |
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| 296 | AddInstTable(InstTable, "DECB" , 0x1f, decode_fixed); |
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| 297 | AddInstTable(InstTable, "SKC" , 0x15, decode_fixed); |
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| 298 | AddInstTable(InstTable, "SKZ" , 0x1e, decode_fixed); |
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| 299 | AddInstTable(InstTable, "SKF1" , 0x16, decode_fixed); |
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| 300 | AddInstTable(InstTable, "SKF2" , 0x14, decode_fixed); |
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| 301 | AddInstTable(InstTable, "RTN" , 0x05, decode_fixed); |
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| 302 | AddInstTable(InstTable, "RTNSK", 0x07, decode_fixed); |
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| 303 | AddInstTable(InstTable, "DIA" , 0x27, decode_fixed); |
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| 304 | AddInstTable(InstTable, "DIB" , 0x23, decode_fixed); |
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| 305 | AddInstTable(InstTable, "DOA" , 0x1d, decode_fixed); |
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| 306 | AddInstTable(InstTable, "SAG" , 0x13, decode_fixed); |
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| 307 | |||
| 308 | AddInstTable(InstTable, "ADI" , 0x60, decode_adi); |
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| 309 | AddInstTable(InstTable, "LD" , 0x30, decode_imm_3); |
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| 310 | AddInstTable(InstTable, "EX" , 0x38, decode_imm_3); |
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| 311 | AddInstTable(InstTable, "EXD" , 0x28, decode_imm_3); |
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| 312 | AddInstTable(InstTable, "LDI" , 0x70, decode_imm_4); |
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| 313 | AddInstTable(InstTable, "LB" , 0xc0, decode_imm_4); |
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| 314 | AddInstTable(InstTable, "LBL" , 0x00, decode_imm_8); |
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| 315 | AddInstTable(InstTable, "SKBI" , 0x40, decode_imm_4); |
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| 316 | AddInstTable(InstTable, "IOL" , 0x1c, decode_imm_8); |
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| 317 | |||
| 318 | AddInstTable(InstTable, "T" , 0x80, decode_t); |
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| 319 | AddInstTable(InstTable, "TM" , 0xc0, decode_tm); |
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| 320 | AddInstTable(InstTable, "TL" , 0x50, decode_tl); |
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| 321 | AddInstTable(InstTable, "TML" , 0x00, decode_tml); |
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| 322 | |||
| 323 | AddInstTable(InstTable, "RES", 0, DecodeRES); |
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| 324 | AddInstTable(InstTable, "DS", 0, DecodeRES); |
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| 325 | AddInstTable(InstTable, "DATA", 0, decode_data_pps4); |
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| 326 | } |
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| 327 | |||
| 328 | /*!------------------------------------------------------------------------ |
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| 329 | * \fn deinit_fields(void) |
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| 330 | * \brief tear down instruction hash table |
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| 331 | * ------------------------------------------------------------------------ */ |
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| 332 | |||
| 333 | static void deinit_fields(void) |
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| 334 | { |
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| 335 | DestroyInstTable(InstTable); |
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| 336 | } |
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| 337 | |||
| 338 | /*---------------------------------------------------------------------------*/ |
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| 339 | /* Interface Functions */ |
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| 340 | |||
| 341 | /*!------------------------------------------------------------------------ |
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| 342 | * \fn make_code_pps4(void) |
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| 343 | * \brief machine instruction dispatcher |
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| 344 | * ------------------------------------------------------------------------ */ |
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| 345 | |||
| 346 | static void make_code_pps4(void) |
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| 347 | { |
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| 348 | CodeLen = 0; DontPrint = False; |
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| 349 | |||
| 350 | /* to be ignored */ |
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| 351 | |||
| 352 | if (Memo("")) return; |
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| 353 | |||
| 354 | /* pseudo instructions */ |
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| 355 | |||
| 356 | if (!LookupInstTable(InstTable, OpPart.str.p_str)) |
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| 357 | WrStrErrorPos(ErrNum_UnknownInstruction, &OpPart); |
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| 358 | } |
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| 359 | |||
| 360 | /*!------------------------------------------------------------------------ |
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| 361 | * \fn switch_from_pps4(void) |
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| 362 | * \brief cleanups after switch from target |
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| 363 | * ------------------------------------------------------------------------ */ |
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| 364 | |||
| 365 | static void switch_from_pps4(void) |
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| 366 | { |
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| 367 | deinit_fields(); |
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| 368 | } |
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| 369 | |||
| 370 | /*!------------------------------------------------------------------------ |
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| 371 | * \fn is_def_cp_pps4(void) |
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| 372 | * \brief does instruction use label field? |
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| 373 | * ------------------------------------------------------------------------ */ |
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| 374 | |||
| 375 | static Boolean is_def_pps4(void) |
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| 376 | { |
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| 377 | return False; |
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| 378 | } |
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| 379 | |||
| 380 | /*!------------------------------------------------------------------------ |
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| 381 | * \fn switch_to_pps4(void) |
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| 382 | * \brief prepare to assemble code for this target |
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| 383 | * ------------------------------------------------------------------------ */ |
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| 384 | |||
| 385 | static void switch_to_pps4(void) |
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| 386 | { |
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| 387 | const TFamilyDescr *p_descr = FindFamilyByName("PPS-4"); |
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| 388 | |||
| 389 | TurnWords = False; |
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| 390 | SetIntConstMode(eIntConstModeIntel); |
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| 391 | |||
| 392 | PCSymbol = "$"; |
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| 393 | HeaderID = p_descr->Id; |
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| 394 | NOPCode = 0x00; |
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| 395 | DivideChars = ","; |
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| 396 | HasAttrs = False; |
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| 397 | |||
| 398 | ValidSegs = (1 << SegCode) | (1 << SegData); |
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| 399 | Grans[SegCode] = 1; ListGrans[SegCode] = 1; SegLimits[SegCode] = 0xfff; |
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| 400 | Grans[SegData] = 1; ListGrans[SegData] = 1; SegLimits[SegData] = 0xfff; |
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| 401 | |||
| 402 | MakeCode = make_code_pps4; |
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| 403 | SwitchFrom = switch_from_pps4; |
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| 404 | IsDef = is_def_pps4; |
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| 405 | init_fields(); |
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| 406 | } |
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| 407 | |||
| 408 | /*!------------------------------------------------------------------------ |
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| 409 | * \fn codepps4_init(void) |
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| 410 | * \brief register PPS-4 target |
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| 411 | * ------------------------------------------------------------------------ */ |
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| 412 | |||
| 413 | void codepps4_init(void) |
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| 414 | { |
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| 415 | (void)AddCPU("PPS-4" , switch_to_pps4); |
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| 416 | } |