Analog Devices ADSP-2106x SHARC User Manual page 528

ALU Floating-Point
B Compute Operations
Fn = ABS (Fx + Fy)
Syntax:
Fn = ABS (Fx + Fy)
Function:
Adds the floating-point operands in registers Fx and Fy, and places the
absolute value of the normalized result in register Fn. Rounding is to
nearest (IEEE) or by truncation, to a 32-bit or to a 40-bit boundary, as
defined by the rounding mode and rounding boundary bits in MODE1.
Post-rounded overflow returns +Infinity (round-to-nearest) or
+NORM.MAX (round-to-zero). Post-rounded denormal returns +Zero.
Denormal inputs are flushed to ±Zero. A NAN input returns an all 1s
result.
Status flags:
AZ Is set if the post-rounded result is a denormal
(unbiased exponent < –126) or zero, otherwise cleared
AU Is set if the post-rounded result is a denormal, otherwise cleared
AN Is cleared
AV Is set if the post-rounded result overflows
(unbiased exponent > +127), otherwise cleared
AC Is cleared
AS Is cleared
AI Is set if either of the input operands is a NAN, or if they are
opposite-signed Infinities, otherwise cleared
B – 26
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