Ejemplo n.º 1
0
attotime &attotime::operator*=(UINT32 factor)
{
	// if one of the items is attotime::never, return attotime::never
	if (seconds >= ATTOTIME_MAX_SECONDS)
		return *this = never;

	// 0 times anything is zero
	if (factor == 0)
		return *this = zero;

	// split attoseconds into upper and lower halves which fit into 32 bits
	UINT32 attolo;
	UINT32 attohi = divu_64x32_rem(attoseconds, ATTOSECONDS_PER_SECOND_SQRT, &attolo);

	// scale the lower half, then split into high/low parts
	UINT64 temp = mulu_32x32(attolo, factor);
	UINT32 reslo;
	temp = divu_64x32_rem(temp, ATTOSECONDS_PER_SECOND_SQRT, &reslo);

	// scale the upper half, then split into high/low parts
	temp += mulu_32x32(attohi, factor);
	UINT32 reshi;
	temp = divu_64x32_rem(temp, ATTOSECONDS_PER_SECOND_SQRT, &reshi);

	// scale the seconds
	temp += mulu_32x32(seconds, factor);
	if (temp >= ATTOTIME_MAX_SECONDS)
		return *this = never;

	// build the result
	seconds = temp;
	attoseconds = (attoseconds_t)reslo + mul_32x32(reshi, ATTOSECONDS_PER_SECOND_SQRT);
	return *this;
}
Ejemplo n.º 2
0
attotime attotime_mul(attotime _time1, UINT32 factor)
{
	UINT32 attolo, attohi, reslo, reshi;
	UINT64 temp;

	/* if one of the items is attotime_never, return attotime_never */
	if (_time1.seconds >= ATTOTIME_MAX_SECONDS)
		return attotime_never;

	/* 0 times anything is zero */
	if (factor == 0)
		return attotime_zero;

	/* split attoseconds into upper and lower halves which fit into 32 bits */
	attohi = divu_64x32_rem(_time1.attoseconds, ATTOSECONDS_PER_SECOND_SQRT, &attolo);

	/* scale the lower half, then split into high/low parts */
	temp = mulu_32x32(attolo, factor);
	temp = divu_64x32_rem(temp, ATTOSECONDS_PER_SECOND_SQRT, &reslo);

	/* scale the upper half, then split into high/low parts */
	temp += mulu_32x32(attohi, factor);
	temp = divu_64x32_rem(temp, ATTOSECONDS_PER_SECOND_SQRT, &reshi);

	/* scale the seconds */
	temp += mulu_32x32(_time1.seconds, factor);
	if (temp >= ATTOTIME_MAX_SECONDS)
		return attotime_never;

	/* build the result */
	return attotime_make(temp, (attoseconds_t)reslo + mul_32x32(reshi, ATTOSECONDS_PER_SECOND_SQRT));
}
Ejemplo n.º 3
0
attotime attotime_div(attotime _time1, UINT32 factor)
{
	UINT32 attolo, attohi, reshi, reslo, remainder;
	attotime result;
	UINT64 temp;

	/* if one of the items is attotime_never, return attotime_never */
	if (_time1.seconds >= ATTOTIME_MAX_SECONDS)
		return attotime_never;

	/* ignore divide by zero */
	if (factor == 0)
		return _time1;

	/* split attoseconds into upper and lower halves which fit into 32 bits */
	attohi = divu_64x32_rem(_time1.attoseconds, ATTOSECONDS_PER_SECOND_SQRT, &attolo);

	/* divide the seconds and get the remainder */
	result.seconds = divu_64x32_rem(_time1.seconds, factor, &remainder);

	/* combine the upper half of attoseconds with the remainder and divide that */
	temp = (INT64)attohi + mulu_32x32(remainder, ATTOSECONDS_PER_SECOND_SQRT);
	reshi = divu_64x32_rem(temp, factor, &remainder);

	/* combine the lower half of attoseconds with the remainder and divide that */
	temp = attolo + mulu_32x32(remainder, ATTOSECONDS_PER_SECOND_SQRT);
	reslo = divu_64x32_rem(temp, factor, &remainder);

	/* round based on the remainder */
	result.attoseconds = (attoseconds_t)reslo + mulu_32x32(reshi, ATTOSECONDS_PER_SECOND_SQRT);
	if (remainder >= factor / 2)
		if (++result.attoseconds >= ATTOSECONDS_PER_SECOND)
		{
			result.attoseconds = 0;
			result.seconds++;
		}
	return result;
}
Ejemplo n.º 4
0
attotime &attotime::operator/=(UINT32 factor)
{
	// if one of the items is attotime::never, return attotime::never
	if (seconds >= ATTOTIME_MAX_SECONDS)
		return *this = never;

	// ignore divide by zero
	if (factor == 0)
		return *this;

	// split attoseconds into upper and lower halves which fit into 32 bits
	UINT32 attolo;
	UINT32 attohi = divu_64x32_rem(attoseconds, ATTOSECONDS_PER_SECOND_SQRT, &attolo);

	// divide the seconds and get the remainder
	UINT32 remainder;
	seconds = divu_64x32_rem(seconds, factor, &remainder);

	// combine the upper half of attoseconds with the remainder and divide that
	UINT64 temp = (INT64)attohi + mulu_32x32(remainder, ATTOSECONDS_PER_SECOND_SQRT);
	UINT32 reshi = divu_64x32_rem(temp, factor, &remainder);

	// combine the lower half of attoseconds with the remainder and divide that
	temp = attolo + mulu_32x32(remainder, ATTOSECONDS_PER_SECOND_SQRT);
	UINT32 reslo = divu_64x32_rem(temp, factor, &remainder);

	// round based on the remainder
	attoseconds = (attoseconds_t)reslo + mulu_32x32(reshi, ATTOSECONDS_PER_SECOND_SQRT);
	if (remainder >= factor / 2)
		if (++attoseconds >= ATTOSECONDS_PER_SECOND)
		{
			attoseconds = 0;
			seconds++;
		}
	return *this;
}