abCalc/ops/abCOpRr.c

52 lines
840 B
C

/*
abCOpRr.c
By: Jeremy Rand
*/
#include <stdio.h>
#include "abCError.h"
#include "abCMode.h"
#include "abCStack.h"
#include "expr/abCExpr.h"
#include "expr/abCExprInt.h"
#include "ops/abCOp.h"
#include "ops/abCOpRr.h"
#define OP_NAME "RR"
static void rrExecute(void);
void abCalcOpRrInit(void)
{
abCalcOpRegister(OP_NAME, rrExecute);
}
void rrExecute(void)
{
abCalcExpr result;
int width;
abCalcIntType bottomBit;
AB_CALC_OP_ONE_ARG(OP_NAME);
if (expr->type != abCalcExprTypeInt) {
abCalcRaiseError(abCalcBadArgTypeError, OP_NAME);
return;
}
width = abCalcModeGetIntWidth();
bottomBit = (expr->u.integer & 1);
abCalcExprIntSet(&result, ((expr->u.integer >> 1) | (bottomBit << (width - 1))));
abCalcStackExprPop(NULL);
abCalcStackExprPush(&result);
}