39 lines
1.4 KiB
C
39 lines
1.4 KiB
C
/*
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* (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
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* See the copyright notice in the ACK home directory, in the file "Copyright".
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*/
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/* Contents of flags used when describing interpreter opcodes */
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#define RCS_IP "$Header$"
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#define OPTYPE 07 /* type field in flag */
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#define OPMINI 0 /* m MINI */
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#define OPSHORT 1 /* s SHORT */
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#define OPNO 2 /* - No operand */
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#define OP8 3 /* 1 1-byte signed operand */
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#define OP16 4 /* 2 2-byte signed operand */
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#define OP32 5 /* 4 4-byte signed operand */
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#define OP64 6 /* 8 8-byte signed operand */
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#define OPESC 010 /* e escaped opcode */
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#define OPWORD 020 /* w operand is word multiple */
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#define OPNZ 040 /* o operand starts at 1 ( or wordsize if w-flag) */
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#define OPRANGE 0300 /* Range of operands: Positive, negative, both */
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#define OP_BOTH 0000 /* the default */
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#define OP_POS 0100 /* p Positive (>=0) operands only */
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#define OP_NEG 0200 /* n Negative (<0) operands only */
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struct opform {
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char i_opcode ; /* the opcode number */
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char i_flag ; /* the flag byte */
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char i_low ; /* the interpreter first opcode */
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char i_num ; /* the number of shorts/minis (optional) */
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};
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/* Escape indicators */
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#define ESC 254 /* To escape group */
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#define ESC_L 255 /* To 32 and 64 bit operands */
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