39 lines
698 B
C
39 lines
698 B
C
#include "am.h"
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#include "env.h"
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#include "store.h"
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#include <assert.h>
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#include <string.h>
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void am_init(am_t *am)
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{
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memset(am, 0, sizeof(am_t));
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am->sp = am->stack + AM_STACK_SIZE - 1;
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store_init(am);
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env_init(am);
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}
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void am_push(am_t *am, am_reg_t reg)
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{
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assert(am->sp >= am->stack);
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*am->sp-- = am->regs[reg];
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}
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void am_pop(am_t *am, am_reg_t reg)
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{
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assert(am->sp < am->stack + AM_STACK_SIZE - 1);
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am->regs[reg] = *++am->sp;
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}
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void am_append(am_t *am, am_reg_t list_reg, am_reg_t item_reg)
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{
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expr_t *list = am->regs[list_reg];
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while (!list->is_atom)
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list = list->pair.cdr;
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list->is_atom = false;
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list->pair.car = am->regs[item_reg];
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list->pair.cdr = expr_empty_list(am);
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}
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