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Sander de Smalen f41dd122d6 [AArch64][SVE] Asm: FP fused multiply-add/subtract instructions. 
This patch adds support for the following instructions:

  FMLA    mul-add, writing addend                (Zda =  Zda +   Zn * Zm)
  FNMLA   negated mul-add, writing addend        (Zda = -Zda +  -Zn * Zm)

  FMLS    mul-sub, writing addend                (Zda =  Zda +  -Zn * Zm)
  FNMLS   negated mul-sub, writing addend        (Zda = -Zda +   Zn * Zm)

  FMAD    mul-add, writing multiplicant          (Zdn =  Za  +  Zdn * Zm)
  FNMAD   negated mul-add, writing multiplicant  (Zdn = -Za  + -Zdn * Zm)

  FMSB    mul-sub, writing multiplicant          (Zdn =  Za  + -Zdn * Zm)
  FNMSB   negated mul-sub, writing multiplicant  (Zdn = -Za  +  Zdn * Zm)

llvm-svn: 337282
 2018-07-17 13:58:46 +00:00