Encoding:

Format:

ADD.fmt 

ADD.S fd, fs, ft

ADD.D fd, fs, ft

Purpose:

Floating Point Add

To add floating point values.

Description:

FPR[fd] = FPR[fs] + FPR[ft]

The value in FPR ft is added to the value in FPR fs. The result is calculated to infinite precision, rounded by using to the current rounding mode in FCSR, and placed into FPR fd. The operands and result are values in format fmt.

The Cause bits are ORed into the Flag bits if no exception is taken.

Restrictions:

The fields fs, ft, and fd must specify FPRs valid for operands of type fmt. If the fields are not valid, the result is

UNPREDICTABLE.

The operands must be values in format fmt. If the fields are not, the result is UNPREDICTABLE and the value of the operand FPRs becomes UNPREDICTABLE.

Availability and Compatibility:

ADD.PS has been removed in Release 6.

Operation:

StoreFPR (fd, fmt, ValueFPR(fs, fmt) +fmt ValueFPR(ft, fmt))

Exceptions:

Coprocessor Unusable, Reserved Instruction

Floating Point Exceptions:

Unimplemented Operation, Invalid Operation, Inexact, Overflow, Underflow