how arch_printf() can print the float digital？

Hi dialog engineer:
当我调试传感器数据,我发现that a problem to solve difficultly.

when i use the angle func( ex: acos, atan....) to process the float digit, and i use arch_printf() func to print the float digit for my application, i see the warning: "FATAL: unsupported printf character: f.", so my question is how to output the float digit to uart for debug?

short gx; short gy; short gz;
short ax; short ay; short az;
short Axyz; float angleX; float angleY; float angleZ;

MPU_Get_Gyroscope(&gx, &gy, &gz);
MPU_Get_Accelerometer(&ax, &ay, &az);

Axyz = ax * ax + ay * ay + az * az;
angleX = acos((double)(ax/sqrt(Axyz))) * 57.295780f;
angleY = acos((double)(ay/sqrt(Axyz))) * 57.295780f;
angleZ = acos((double)(az/sqrt(Axyz))) * 57.295780f;

arch_printf("%f, %f, %f\r\n", angleX, angleY , angleZ );

when the sensor run, the console output : "FATAL: unsupported printf character: f., FATAL: unsupported printf character: f., FATAL: unsupported printf character: f."
i check the arch_printf(), find that arch_printf() does not support formart float & double.
so how can i debug the float data with arch_printf()?
pls help me, ths.