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// -*- C -*-

//

// NEC specific instructions

//

// Integer Instructions

// --------------------

//

// MulAcc is the Multiply Accumulator.

//     This register is mapped on the the HI and LO registers.

//     Upper 32 bits of MulAcc is mapped on to lower 32 bits of HI register.

//     Lower 32 bits of MulAcc is mapped on to lower 32 bits of LO register.

:function:::unsigned64:MulAcc:

*vr4100:

{

  unsigned64 result = U8_4 (HI, LO);

  return result;

}

:function:::void:SET_MulAcc:unsigned64 value

*vr4100:

{

  /* 64 bit specific */

  *AL4_8 (&HI) = VH4_8 (value);

  *AL4_8 (&LO) = VL4_8 (value);

}

:function:::signed64:SignedMultiply:signed32 l, signed32 r

*vr4100:

{

  signed64 result = (signed64) l * (signed64) r;

  return result;

}

:function:::unsigned64:UnsignedMultiply:unsigned32 l, unsigned32 r

*vr4100:

{

  unsigned64 result = (unsigned64) l * (unsigned64) r;

  return result;

}

:function:::unsigned64:Low32Bits:unsigned64 value

*vr4100:

{

  unsigned64 result = (signed64) (signed32) VL4_8 (value);

  return result;

}

:function:::unsigned64:High32Bits:unsigned64 value

*vr4100:

{

  unsigned64 result = (signed64) (signed32) VH4_8 (value);

  return result;

}

// Multiply, Accumulate

000000,5.RS,5.RT,00000,00000,101000::64::MAC

"mac r, r"

*vr4100:

{

  SET_MulAcc (SD_, MulAcc (SD_) + SignedMultiply (SD_, GPR[RS], GPR[RT]));

}

// D-Multiply, Accumulate

000000,5.RS,5.RT,00000,00000,101001::64::DMAC

"dmac r, r"

*vr4100:

{

  LO = LO + SignedMultiply (SD_, GPR[RS], GPR[RT]);

}