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51 lines
826 B
C
51 lines
826 B
C
/*
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abCOpAsr.c
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By: Jeremy Rand
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*/
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#include <stdio.h>
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#include "abCOpAsr.h"
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#include "abCOp.h"
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#include "abCError.h"
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#include "abCExpr.h"
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#include "abCExprInt.h"
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#include "abCMode.h"
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#include "abCStack.h"
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#define OP_NAME "ASR"
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static void asrExecute(void);
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void abCalcOpAsrInit(void)
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{
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abCalcOpRegister(OP_NAME, asrExecute);
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}
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void asrExecute(void)
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{
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abCalcExpr result;
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int width;
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abCalcIntType upperBit;
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AB_CALC_OP_ONE_ARG(OP_NAME);
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if (expr->type != abCalcExprTypeInt) {
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abCalcRaiseError(abCalcBadArgTypeError, OP_NAME);
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return;
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}
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width = abCalcModeGetIntWidth();
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upperBit = (expr->u.integer & (1 << (width - 1)));
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abCalcExprIntSet(&result, ((expr->u.integer >> 1) | upperBit));
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abCalcStackExprPop(NULL);
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abCalcStackExprPush(&result);
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}
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