78 lines
1.5 KiB
C
78 lines
1.5 KiB
C
// -*- 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]);
|
|
}
|
|
|
|
|
|
|