CP_IsSqrtBusy


C Specification

	#include <nitro/cp.h>
	
	s32 CP_IsSqrtBusy( void )

Description

Checks whether square root calculator is busy or not. After writing in a square root calculation register, it will be in a busy state for a fixed cycle period. When acquiring results of square root calculation, you need to read when it is no longer busy.

Calculation cycles are as follows (The calculation cycle is a cycle number based on 33.514 MHz. The CPU cycle conversion is a cycle number based on 67.028 MHz.):

Division Mode

Calculation

Calculation Cycle

CPU Cycle Conversion

CP_SQRT_32BIT_MODE

Square root calculation of 32-bit value

13 cycles

26 cycles

CP_SQRT_64BIT_MODE

Square root calculation of 64-bit value

13 cycles

26 cycles

Internal Operation

Reference SQRTCNT(0x40002B0) of the IO register.

Arguments

None.

Return Values

Determines whether square root calculator is busy. 0 means ready state and non-0 means busy state.

See Also

CP_SetSqrtImm*, CP_SetSqrt*, CP_WaitSqrt, CP_GetSqrtResult*

Revision History

11/02/2004 Corrected the error in cycle numbers. Changed the function type in the C Specification from int to s32.
06/16/2004 Added description of cycle number.
01/09/2004 Added content.
12/01/2003 Initial version.