Operating the I2C(28x) in FIFO mode,how to detecting and handling NACK through polling?

Hi 

 There's a example to Detecting and handling NACK  when not in FIFO moden:

/ Wait for "XRDY" flag to transmit data or "ARDY" if we get NACKed
while ( !(*I2C_STR & (ICSTR_ICXRDY|ICSTR_ARDY)) );
 
// If a NACK occurred then SCL is held low and STP bit cleared
if ( *I2C_STR & ICSTR_NACK )
{
	*I2C_MDR |= ICMDR_STP;	// send STP to end transfer
	*I2C_STR = ICSTR_NACK;	// clear NACK bit
	return I2C_FAIL;
}

But,When in FIFO mode(,I2caRegs.I2CFFTX.all = 0x6000;I2caRegs.I2CFFRX.all = 0x2040;how to detecting and handling NACK through polling?

Thank