87 lines
3.8 KiB
C
87 lines
3.8 KiB
C
/*
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* ZRE - A lightweight, portable programming language for permacomputing.
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* Copyright (C) 2025 zongor
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#ifndef ZRE_VM_H
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#define ZRE_VM_H
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#include "common.h"
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/* Constants for Q16.16 */
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#define Q16_16_SCALE (1 << 16)
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#define Q16_16_SCALE_FLOAT 65536.0f
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#define Q16_16_FRACTION_MASK 0x0000FFFF
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#define Q16_16_INT_MASK 0xFFFF0000
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/* Convert float to Q16.16 (with rounding) */
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#define FLOAT_TO_Q16_16(f) ((int32_t)((f) * Q16_16_SCALE_FLOAT + 0.5f))
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/* Convert Q16.16 to float */
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#define Q16_16_TO_FLOAT(q) ((float)(q) / Q16_16_SCALE_FLOAT)
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typedef union {
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int32_t i; /* Integers */
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int32_t q; /* Q16.16 (32-bit fixed-point) */
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uint32_t u; /* Unsigned integers */
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char c[4]; /* 4 Byte char array for string packing */
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} Word;
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typedef enum {
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OP_HALT, /* terminate execution */
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OP_ADD_INT, /* dest = src1 + src2 */
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OP_SUB_INT, /* dest = src1 - src2 */
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OP_MUL_INT, /* dest = src1 * src2 */
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OP_DIV_INT, /* dest = src1 / src2 */
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OP_JEQ_INT, /* jump to address dest if src1 as int == src2 as int */
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OP_JGT_INT, /* jump to address dest if src1 as int > src2 as int*/
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OP_JLT_INT, /* jump to address dest if src1 as int < src2 as int */
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OP_JLE_INT, /* jump to address dest if src1 as int <= src2 as int */
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OP_JGE_INT, /* jump to address dest if src1 as int >= src2 as int*/
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OP_INT_TO_REAL, /* dest = src1 as f32 */
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OP_ADD_UINT, /* dest = src1 + src2 */
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OP_SUB_UINT, /* dest = src1 - src2 */
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OP_MUL_UINT, /* dest = src1 * src2 */
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OP_DIV_UINT, /* dest = src1 / src2 */
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OP_JEQ_UINT, /* jump to address dest if src1 as int == src2 as uint */
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OP_JGT_UINT, /* jump to address dest if src1 as int > src2 as uint*/
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OP_JLT_UINT, /* jump to address dest if src1 as int < src2 as uint */
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OP_JLE_UINT, /* jump to address dest if src1 as int <= src2 as uint */
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OP_JGE_UINT, /* jump to address dest if src1 as int >= src2 as uint*/
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OP_UINT_TO_REAL, /* dest = src1 as f32 */
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OP_ADD_REAL, /* dest = src1 + src2 */
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OP_SUB_REAL, /* dest = src1 - src2 */
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OP_MUL_REAL, /* dest = src1 * src2 */
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OP_DIV_REAL, /* dest = src1 / src2 */
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OP_JEQ_REAL, /* jump to address dest if src1 as real == src2 as real */
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OP_JGE_REAL, /* jump to address dest if src1 as real >= src2 as real */
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OP_JGT_REAL, /* jump to address dest if src1 as real > src2 as real */
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OP_JLT_REAL, /* jump to address dest if src1 as real < src2 as real */
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OP_JLE_REAL, /* jump to address dest if src1 as real <= src2 as real */
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OP_REAL_TO_INT, /* dest = src1 as int */
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OP_REAL_TO_UINT, /* dest = src1 as int */
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OP_MOV, /* dest = src1 */
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OP_JMP, /* jump to address src1 unconditionally */
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OP_INT_TO_STRING, /* dest = src1 as str */
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OP_UINT_TO_STRING, /* dest = src1 as str */
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OP_REAL_TO_STRING, /* dest = src1 as str */
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OP_READ_STRING, /* dest = read as str */
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OP_PRINT_STRING, /* write src1 to stdout */
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OP_CMP_STRING, /* dest = src1 as str == src2 as str */
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} Opcode;
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uint32_t step_vm(Word *memory, uint32_t memory_size, uint32_t pc);
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#endif
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