xsnmsubmsp
VSX Scalar Negative Multiply-Subtract Type-M Single-Precision
Performs a scalar negative multiply-subtract operation in single-precision floating-point, storing the result using the Type-M (multiplicand) form where the target register provides one of the multiplicand operands.
Details
The xsnmsubmsp instruction multiplies two single-precision floating-point values, subtracts another single-precision value from the product, negates the result, and places the result into the target register. In the Type-M form, the target register (XT) is used as one of the multiplicand operands. The operation is performed in single-precision format as defined by the VSX scalar single-precision arithmetic rules.
Programming Note
The xsnmsubmsp instruction is useful for performing complex floating-point calculations involving multiplication, subtraction, and negation in a single operation. Ensure that the target register (XT) is properly aligned and contains valid single-precision floating-point values to avoid undefined behavior. This instruction operates at user privilege level and may raise exceptions if operands are out of range or if there are NaNs involved.