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/*
* Test sign extensions on short signed values passed as arguments
* to function calls. Include arithmetic to produce extra high bits
* from operations that overflow. Lots of codes do this!
*/
#include <stdio.h>
#include <stdarg.h>
#include <inttypes.h>
typedef signed char schar;
short getShort(schar c, schar c2, schar c3, short s, short s2, int i);
int getUnknown(schar c, ...);
int passShort(schar c, short s)
{
schar c2 = s + c;
schar c3 = s - c;
short s2 = s * c;
int i = s * s * c * c;
short s3 = getShort(c, c2, c3, s, s2, i); /* args shd be sign-extended */
return getUnknown(c, c2, c3, s, s2, s3, i); /* args shd be promoted to int */
}
int main()
{
printf("%d\n", passShort(0x80, 0xf0f4));
return 0;
}
short getShort(schar c, schar c2, schar c3, short s, short s2, int i)
{
int bc = c == (schar) -128;
int bc2 = c2 == (schar) 116;
int bc3 = c3 == (schar) 116;
int bs = s == (short) -3852;
int bs2 = s2 == (short) -31232;
int bi = i == (int) -1708916736;
printf("getShort():\t%d %d %d %d %d %d\n", bc, bc2, bc3, bs, bs2, bi);
printf("getShort():\t%d %d %d %d %d %d\n", c, c2, c3, s, s2, i);
return (c + c2 + c3 + s + s2) + (short) i;
}
int getUnknown(schar c, ...)
{
schar c2, c3;
short s, s2, s3;
int i;
va_list ap;
va_start(ap, c);
c2 = (schar) va_arg(ap, int);
c3 = (schar) va_arg(ap, int);
s = (short) va_arg(ap, int);
s2 = (short) va_arg(ap, int);
s3 = (short) va_arg(ap, int);
i = va_arg(ap, int);
va_end(ap);
printf("getUnknown():\t%d %d %d %d %d %d %d\n", c, c2, c3, s, s2, s3, i);
return c + c2 + c3 + s + s2 + s3 + i;
}
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