FNMLS Floating-point negated fused multiply-subtract vectors (predicated), writing addend [Zda = -Zda + Zn * Zm] Multiply the corresponding active floating-point elements of the first and second source vectors and subtract from elements of the third source (addend) vector without intermediate rounding. Destructively place the negated results in the destination and third source (addend) vector. Inactive elements in the destination vector register remain unmodified. Green True True True 0 1 1 0 0 1 0 1 1 0 1 1 FNMLS <Zda>.<T>, <Pg>/M, <Zn>.<T>, <Zm>.<T> if !IsFeatureImplemented(FEAT_SVE) && !IsFeatureImplemented(FEAT_SME) then UNDEFINED; if size == '00' then UNDEFINED; constant integer esize = 8 << UInt(size); constant integer g = UInt(Pg); constant integer n = UInt(Zn); constant integer m = UInt(Zm); constant integer da = UInt(Zda); constant boolean op1_neg = FALSE; constant boolean op3_neg = TRUE; <Zda> Is the name of the third source and destination scalable vector register, encoded in the "Zda" field. <T> Is the size specifier, size <T> 00 RESERVED 01 H 10 S 11 D <Pg> Is the name of the governing scalable predicate register P0-P7, encoded in the "Pg" field. <Zn> Is the name of the first source scalable vector register, encoded in the "Zn" field. <Zm> Is the name of the second source scalable vector register, encoded in the "Zm" field. CheckSVEEnabled(); constant integer VL = CurrentVL; constant integer PL = VL DIV 8; constant integer elements = VL DIV esize; constant bits(PL) mask = P[g, PL]; constant bits(VL) op1 = if AnyActiveElement(mask, esize) then Z[n, VL] else Zeros(VL); constant bits(VL) op2 = if AnyActiveElement(mask, esize) then Z[m, VL] else Zeros(VL); constant bits(VL) op3 = Z[da, VL]; bits(VL) result; for e = 0 to elements-1 if ActivePredicateElement(mask, e, esize) then constant bits(esize) elem1 = (if op1_neg then FPNeg(Elem[op1, e, esize], FPCR) else Elem[op1, e, esize]); constant bits(esize) elem2 = Elem[op2, e, esize]; constant bits(esize) elem3 = (if op3_neg then FPNeg(Elem[op3, e, esize], FPCR) else Elem[op3, e, esize]); Elem[result, e, esize] = FPMulAdd(elem3, elem1, elem2, FPCR); else Elem[result, e, esize] = Elem[op3, e, esize]; Z[da, VL] = result;