32 lines
675 B
C
32 lines
675 B
C
#include "./stack.h"
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#include <stdlib.h>
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#include <stdio.h>
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r16_int StackPop()
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{
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#ifdef DO_STACK_CHECKS
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if (GetRegister(SP).u == 0)
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{
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fprintf(stderr, "STACK UNDERFLOW\n");
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exit(-1);
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}
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#endif
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SetRegister(SP, (r16_int){ GetRegister(SP).u - 1 });
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return GetValue((r16_int){ GetRegister(SP).u + STACK_LOCATION });
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}
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void StackPush(r16_int value)
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{
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#ifdef DO_STACK_CHECKS
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if (GetRegister(SP).u >= STACK_SIZE)
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{
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fprintf(stderr, "STACK OVERFLOW\n");
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exit(-1);
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}
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#endif
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SetValue((r16_int){ GetRegister(SP).u + STACK_LOCATION }, value);
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SetRegister(SP, (r16_int){ GetRegister(SP).u + 1 });
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}
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