FMUL (immediate) Floating-point multiply by immediate (predicated) Multiply by an immediate each active floating-point element of the source vector, and destructively place the results in the corresponding elements of the source vector. The immediate may take the value +0.5 or +2.0 only. Inactive elements in the destination vector register remain unmodified. Green True True True 0 1 1 0 0 1 0 1 0 1 1 0 1 0 1 0 0 0 0 0 0 FMUL <Zdn>.<T>, <Pg>/M, <Zdn>.<T>, <const> 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 dn = UInt(Zdn); constant bits(esize) imm = if i1 == '0' then FPPointFive('0', esize) else FPTwo('0', esize); <Zdn> Is the name of the source and destination scalable vector register, encoded in the "Zdn" 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. <const> Is the floating-point immediate value, i1 <const> 0 #0.5 1 #2.0
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) operand1 = Z[dn, VL]; bits(VL) result; for e = 0 to elements-1 constant bits(esize) element1 = Elem[operand1, e, esize]; if ActivePredicateElement(mask, e, esize) then Elem[result, e, esize] = FPMul(element1, imm, FPCR); else Elem[result, e, esize] = element1; Z[dn, VL] = result;