Embedded Software and Motor Control Libraries for PXR40xx

Function GFLIB_Sign_F16
}
f32In = FRAC32 (0.5);
// output should be 0x7FFFFFFF ~ FRAC32(1)
f32Out = GFLIB_Sign_F32 (f32In);
// output should be 0x7FFFFFFF ~ FRAC32(1)
f32Out = GFLIB_Sign (f32In,Define F32);
// ##############################################################
// Available only if 32-bit fractional implementation selected
// as default
// ##############################################################
// output should be 0x7FFFFFFF ~ FRAC32(1)
f32Out = GFLIB_Sign (f32In);
4.77 Function GFLIB_Sign_F16
This function returns the signum of input value.
4.77.1 Declaration
tFrac16 GFLIB_Sign_F16(tFrac16 f16In);
4.77.2 Arguments
Table 4-98. GFLIB_Sign_F16 arguments
Type Name Direction Description
tFrac16 f16In input Input argument.
4.77.3 Return
The function returns the sign of the input argument.
4.77.4 Description
The GFLIB_Sign function calculates the sign of the input argument. The function return
value is computed as follows. If the input value is negative, then the return value will be
set to "-1" (0x8000 hex), if the input value is zero, then the function returns "0" (0x0
hex), otherwise if the input value is greater than zero, the return value will be "1" (0x7fff
hex).
Embedded Software and Motor Control Libraries for PXR40xx, Rev. 1.0
396 Freescale Semiconductor, Inc.