xvnmaddmsp
VSX Vector Negative Multiply-Add Type-M Single-Precision
Performs a vector single-precision floating-point negative multiply-add operation (Type-M), computing the negation of (XB * XT + XA) for each single-precision element.
Details
The xvnmaddmsp instruction performs a vector negative multiply-add Type-M operation on single-precision floating-point values. For each of the four single-precision elements, the instruction multiplies the corresponding element of the XB source register by the corresponding element of the target register XT, adds the corresponding element of XA, and stores the negated result back into XT. This is the Type-M variant, meaning the multiplicand is taken from the target register XT rather than a separate register.
Programming Note
This instruction is useful for performing complex vector operations involving single-precision floating-point arithmetic. Ensure that all input and output vectors are properly aligned to avoid performance penalties or exceptions. The operation is performed at the user privilege level, so no special privileges are required. Be cautious of potential overflow or underflow conditions during multiplication and addition steps.