PC = (W < 0) ? LLLL : (PC + 1)
Tests the contents of the floating point register W, transfers program control (jumps) to the destination LLLL if W<0 (including -Infinity). Will not jump if W=NaN. Does not affect the contents of W.
Dialect restriction: This instruction is not implemented in boards with dialect numbers less than 6, or which do not have the FP processor.
See also fGoIfNZ, fGoIfPos, fGoIfZ, fGoIfWLTQ, fGoIfWLEQ, fGoIfWGTQ