fnmsub.q

Floating-Point Negate-Multiply-Subtract Quad-Precision

This instruction is defined by:

Encoding

Synopsis

The fnmsub.q instruction multiplies the values in fs1 and fs2, negates the product, subtracts the value in fs3, and writes the final result to fd. fnmsub.q computes -(fs1 * fs2) - fs3.

Access

M	HS	U	VS	VU
Always	Always	Always	Always	Always

Always

Decode Variables

Bits<5> fs3 = $encoding[31:27];
Bits<5> fs2 = $encoding[24:20];
Bits<5> fs1 = $encoding[19:15];
Bits<3> rm = $encoding[14:12];
Bits<5> fd = $encoding[11:7];

Execution

Pruned, XLEN == 64
Original