SW006013 Microchip Technology, SW006013 Datasheet - Page 227

• Manufacturer Part Number: SW006013
• Description: MPLAB C Compiler For DsPIC DSCs
• Manufacturer: Microchip Technology
• Series: DsPIC30F/33Fr
• Type: MPLAB® C Compilerr

Specifications of SW006013

• Supported Families: DsPIC30F, DsPIC33F
• Core Architecture: DsPIC
• Kit Contents: Software And Docs
• Mcu Supported Families: DsPIC30F And DsPIC33F
• Tool Function: Compiler
• Tool Type: Compiler
• Processor Series: dsPIC
• Lead Free Status / RoHS Status: na
• For Use With/related Products: dSPIC DSCs
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

© 2008 Microchip Technology Inc.
_Q16reciprocalQ15
Description:
Include:
Prototype:
Argument:
Return Value:
_Q16reciprocalQ16
Description:
Include:
Prototype:
Argument:
Return Value:
_Q16shl
Description:
Include:
Prototype:
Argument:
Return Value:
_Q16shlNoSat
Description:
Include:
Prototype:
Argument:
Return Value:
This function returns the reciprocal of a Q15 value. Since the input
range lies in the -1 to +1 region, the output is always greater than the -1
or +1 region. So Q16 format is used to represent the output.
<libq.h>
_Q16 _Q16reciprocalQ15(_Q15 x);
x
2
This function returns the reciprocal of x in Q16 format. This value
ranges from -2147483648 to 2147418112.
This function returns the reciprocal value of the input.
<libq.h>
_Q16 _Q16reciprocalQ16(_Q16 x);
x
ranges from -2147483648 to 2147483647.
This function returns the reciprocal of x in Q16 format. The value of this
output ranges from -2147483648 to 2147483647.
The function shifts the input argument x by y number of bits, to the left
if y is positive or to the right if y is negative. The function takes care of
saturating the result, in case of underflow or overflow.
<libq.h>
_Q16 _Q16shl(_Q16 x, short y);
x
ranges from -2147483648 to 2147483647.
y
This function returns the shifted value of x in Q16 format. This value
ranges from -2147483648 to 2147483647.
The function shifts the input argument x by y number of bits, to the left
if y is positive or to the right if y is negative. This function sets the
_Q16shlSatFlag variable in case of underflow or overflow but does
not take care of saturation.
<libq.h>
_Q16 _Q16shlNoSat(_Q16 x, short y);
x
ranges from -2147483648 to 2147483647.
y
This function returns the shifted value of x in Q16 format. This value
ranges from -2147483648 to 2147483647.
15
-1. The value of this argument ranges from -32768 to 32767.
a fixed point number in Q15 format, which ranges from -2
a fixed point number in Q16 format. The value of this argument
a fixed point number in Q16 format. The value of this argument
an integer number, which ranges from -32 to +32.
a fixed point number in Q16 format. The value of this argument
an integer number, which ranges from -32 to +32.
DS51456E-page 223
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