| // -*- 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<RS>, r<RT>" |
| *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<RS>, r<RT>" |
| *vr4100: |
| { |
| LO = LO + SignedMultiply (SD_, GPR[RS], GPR[RT]); |
| } |
| |
| |
| |