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ExecuteALU.cpp
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ExecuteALU.cpp
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#include "basetypes.h"
#include "InstructionCache.h"
#include "mpe.h"
#include <cstdlib>
#include <intrin.h>
void Execute_ABS(MPE &mpe, const uint32 pRegs[48], const Nuance &nuance)
{
mpe.cc &= ~(CC_ALU_NEGATIVE | CC_ALU_OVERFLOW | CC_ALU_ZERO | CC_ALU_CARRY);
const int32 src1 = pRegs[nuance.fields[FIELD_ALU_SRC1]];
if(src1 < 0)
{
mpe.cc |= CC_ALU_CARRY;
if(src1 == (int32)0x80000000)
{
//source was negative, result is negative (non-zero)
mpe.cc |= (CC_ALU_NEGATIVE | CC_ALU_OVERFLOW);
}
else
{
mpe.regs[nuance.fields[FIELD_ALU_DEST]] = -src1;
}
}
else
{
if(!src1)
{
//source wasnt negative, result is zero (non-negative)
mpe.cc |= CC_ALU_ZERO;
}
}
}
void Execute_BITSScalar(MPE &mpe, const uint32 pRegs[48], const Nuance &nuance)
{
mpe.cc &= ~(CC_ALU_ZERO | CC_ALU_NEGATIVE);
const uint32 result = nuance.fields[FIELD_ALU_SRC1] &
(pRegs[nuance.fields[FIELD_ALU_DEST]] >> (pRegs[nuance.fields[FIELD_ALU_SRC2]] & 0x1F));
mpe.regs[nuance.fields[FIELD_ALU_DEST]] = result;
if(!result)
{
mpe.cc |= CC_ALU_ZERO;
}
else
{
// negative = bit 31 of result
mpe.cc |= ((result >> 28) & CC_ALU_NEGATIVE);
}
}
void Execute_BITSImmediate(MPE &mpe, const uint32 pRegs[48], const Nuance &nuance)
{
mpe.cc &= ~(CC_ALU_ZERO | CC_ALU_NEGATIVE);
const uint32 result = nuance.fields[FIELD_ALU_SRC1] &
(pRegs[nuance.fields[FIELD_ALU_DEST]] >> nuance.fields[FIELD_ALU_SRC2]);
mpe.regs[nuance.fields[FIELD_ALU_DEST]] = result;
if(!result)
{
mpe.cc |= CC_ALU_ZERO;
}
else
{
// negative = bit 31 of result
mpe.cc |= ((result >> 28) & CC_ALU_NEGATIVE);
}
}
void Execute_BTST(MPE &mpe, const uint32 pRegs[48], const Nuance &nuance)
{
mpe.cc &= ~(CC_ALU_ZERO | CC_ALU_NEGATIVE | CC_ALU_OVERFLOW);
if(!(nuance.fields[FIELD_ALU_SRC1] & pRegs[nuance.fields[FIELD_ALU_SRC2]]))
{
mpe.cc |= CC_ALU_ZERO;
}
}
void Execute_BUTT(MPE &mpe, const uint32 pRegs[48], const Nuance &nuance)
{
const uint32 src1 = pRegs[nuance.fields[FIELD_ALU_SRC1]];
const uint32 src2 = pRegs[nuance.fields[FIELD_ALU_SRC2]];
const uint32 dest = nuance.fields[FIELD_ALU_DEST];
mpe.cc &= ~(CC_ALU_ZERO | CC_ALU_NEGATIVE | CC_ALU_OVERFLOW | CC_ALU_CARRY);
uint32 sum;
mpe.cc |= _addcarry_u32(0, src1, src2, &sum) ? CC_ALU_CARRY : 0;
mpe.regs[dest + 1] = src2 - src1;
if((~(src1 ^ src2)) & (src1 ^ sum) & 0x80000000u)
{
mpe.cc |= CC_ALU_OVERFLOW;
}
if(sum & 0x80000000u)
{
mpe.cc |= CC_ALU_NEGATIVE;
}
if(!sum)
{
mpe.cc |= CC_ALU_ZERO;
}
mpe.regs[dest] = sum;
}
void Execute_COPY(MPE &mpe, const uint32 pRegs[48], const Nuance &nuance)
{
mpe.cc &= ~(CC_ALU_ZERO | CC_ALU_NEGATIVE | CC_ALU_OVERFLOW);
const uint32 src = pRegs[nuance.fields[FIELD_ALU_SRC2]];
mpe.regs[nuance.fields[FIELD_ALU_DEST]] = src;
if(!src)
{
mpe.cc |= CC_ALU_ZERO;
}
else
{
// negative = bit 31 of result
mpe.cc |= ((src >> 28) & CC_ALU_NEGATIVE);
}
}
void Execute_MSB(MPE &mpe, const uint32 pRegs[48], const Nuance &nuance)
{
uint32 sigbits;
mpe.cc &= ~CC_ALU_ZERO;
int32 n = mpe.regs[nuance.fields[FIELD_ALU_SRC1]];
if((n == 0) || (n == -1))
{
sigbits = 0;
}
else
{
//n = n if positive, n = ~n if negative
n = (n ^ (n >> 31));
//fold n into itself to get a new value where all bits below the
//most significant one bit have also been set to one.
n |= (n >> 1);
n |= (n >> 2);
n |= (n >> 4);
n |= (n >> 8);
n |= (n >> 16);
//get the ones count
n -= ((n >> 1) & 0x55555555);
n = (((n >> 2) & 0x33333333) + (n & 0x33333333));
n = (((n >> 4) + n) & 0x0f0f0f0f);
n += (n >> 8);
n += (n >> 16);
//return the ones count... if n was originally 0 or -1 then the ones count
//will be zero which is exactly what we want
sigbits = ((uint32)n) & 0x1FUL;
}
mpe.regs[nuance.fields[FIELD_ALU_DEST]] = sigbits;
if(!sigbits)
{
mpe.cc |= CC_ALU_ZERO;
}
}
void Execute_SAT(MPE &mpe, const uint32 pRegs[48], const Nuance &nuance)
{
int32 mask = (0x01UL << nuance.fields[FIELD_ALU_SRC2]) - 1;
const int32 n = pRegs[nuance.fields[FIELD_ALU_SRC1]];
const uint32 dest = nuance.fields[FIELD_ALU_DEST];
//initial mask is largest negative number using 'bits' bits, minus one to get
//largest positive signed number using 'bits' bits
//NOTE: the bits parameter will be one less than the number of bits desired
//so you do not have to subtract 1 from the shift amount to get the correct
//mask
if(n > mask)
{
mpe.regs[dest] = mask;
}
else
{
//inverting mask gives smallest negative number possible using 'bits' bits
mask = ~mask;
if(n < mask)
{
mpe.regs[dest] = mask;
}
else
{
mpe.regs[dest] = n;
}
}
mpe.cc &= ~(CC_ALU_ZERO | CC_ALU_NEGATIVE);
if(!mpe.regs[dest])
{
mpe.cc |= CC_ALU_ZERO;
}
else
{
// negative = bit 31 of result
mpe.cc |= ((mpe.regs[dest] >> 28) & CC_ALU_NEGATIVE);
}
}
void Execute_AS(MPE &mpe, const uint32 pRegs[48], const Nuance &nuance)
{
uint32 src1 = pRegs[nuance.fields[FIELD_ALU_SRC1]] & 0x3FUL;
const uint32 src2 = pRegs[nuance.fields[FIELD_ALU_SRC2]];
mpe.cc &= ~(CC_ALU_ZERO | CC_ALU_OVERFLOW | CC_ALU_NEGATIVE | CC_ALU_CARRY);
if(src1 & 0x20)
{
//shift left
src1 = 64UL - src1;
//carry = bit 31 of source
mpe.cc |= ((src2 >> 30) & CC_ALU_CARRY);
const uint32 result = src2 << src1;
//The Nuon allows left shifts by 32, effectively clearing out the
//source register. The x86 shift instructions performs shifts with
//counts adjusted to the range [0,31] so the result of a shift by 32
//is treated as a shift by zero. The result of the shift needs to be
//monitored for this special case, and when it happens, the destination
//register should be forced to zero.
if((result == 0) || (src1 == 32))
{
mpe.regs[nuance.fields[FIELD_ALU_DEST]] = 0;
mpe.cc |= CC_ALU_ZERO;
}
else
{
// negative = bit 31 of result
mpe.regs[nuance.fields[FIELD_ALU_DEST]] = result;
mpe.cc |= ((result >> 28) & CC_ALU_NEGATIVE);
}
}
else
{
//shift right
const uint32 result = ((int32)src2) >> src1;
mpe.regs[nuance.fields[FIELD_ALU_DEST]] = result;
// carry = bit 0 of source
mpe.cc |= ((src2 << 1) & CC_ALU_CARRY);
if(!result)
{
mpe.cc |= CC_ALU_ZERO;
}
else
{
// negative = bit 31 of result
mpe.cc |= ((result >> 28) & CC_ALU_NEGATIVE);
}
}
}
void Execute_ASL(MPE &mpe, const uint32 pRegs[48], const Nuance &nuance)
{
mpe.cc &= ~(CC_ALU_ZERO | CC_ALU_OVERFLOW | CC_ALU_NEGATIVE | CC_ALU_CARRY);
const uint32 src2 = pRegs[nuance.fields[FIELD_ALU_SRC2]];
// carry = bit 31 of source
mpe.cc |= ((src2 >> 30) & CC_ALU_CARRY);
const uint32 result = src2 << nuance.fields[FIELD_ALU_SRC1];
mpe.regs[nuance.fields[FIELD_ALU_DEST]] = result;
if(!result)
{
mpe.cc |= CC_ALU_ZERO;
}
else
{
// negative = bit 31 of result
mpe.cc |= ((result >> 28) & CC_ALU_NEGATIVE);
}
}
void Execute_ASR(MPE &mpe, const uint32 pRegs[48], const Nuance &nuance)
{
mpe.cc &= ~(CC_ALU_ZERO | CC_ALU_OVERFLOW | CC_ALU_NEGATIVE | CC_ALU_CARRY);
const uint32 src2 = pRegs[nuance.fields[FIELD_ALU_SRC2]];
const uint32 result = ((int32)src2) >> nuance.fields[FIELD_ALU_SRC1];
// carry = bit 0 of source
mpe.cc |= ((src2 << 1) & CC_ALU_CARRY);
mpe.regs[nuance.fields[FIELD_ALU_DEST]] = result;
if(!result)
{
mpe.cc |= CC_ALU_ZERO;
}
else
{
// negative = bit 31 of result
mpe.cc |= ((result >> 28) & CC_ALU_NEGATIVE);
}
}
void Execute_LS(MPE &mpe, const uint32 pRegs[48], const Nuance &nuance)
{
uint32 src1 = pRegs[nuance.fields[FIELD_ALU_SRC1]] & 0x3FUL;
const uint32 src2 = pRegs[nuance.fields[FIELD_ALU_SRC2]];
mpe.cc &= ~(CC_ALU_ZERO | CC_ALU_OVERFLOW | CC_ALU_NEGATIVE | CC_ALU_CARRY);
if(src1 & 0x20)
{
//shift left
src1 = 64UL - src1;
//carry = bit 31 of source
mpe.cc |= ((src2 >> 30) & CC_ALU_CARRY);
const uint32 result = src2 << src1;
//The Nuon allows left shifts by 32, effectively clearing out the
//source register. The x86 shift instructions performs shifts with
//counts adjusted to the range [0,31] so the result of a shift by 32
//is treated as a shift by zero. The result of the shift needs to be
//monitored for this special case, and when it happens, the destination
//register should be forced to zero.
if((result == 0) || (src1 == 32))
{
mpe.regs[nuance.fields[FIELD_ALU_DEST]] = 0;
mpe.cc |= CC_ALU_ZERO;
}
else
{
// negative = bit 31 of result
mpe.regs[nuance.fields[FIELD_ALU_DEST]] = result;
mpe.cc |= ((result >> 28) & CC_ALU_NEGATIVE);
}
}
else
{
//shift right
const uint32 result = src2 >> src1;
mpe.regs[nuance.fields[FIELD_ALU_DEST]] = result;
// carry = bit 0 of source
mpe.cc |= ((src2 << 1) & CC_ALU_CARRY);
if(!result)
{
mpe.cc |= CC_ALU_ZERO;
}
else
{
// negative = bit 31 of result
mpe.cc |= ((result >> 28) & CC_ALU_NEGATIVE);
}
}
}
void Execute_LSR(MPE &mpe, const uint32 pRegs[48], const Nuance &nuance)
{
const uint32 src2 = pRegs[nuance.fields[FIELD_ALU_SRC2]];
mpe.cc &= ~(CC_ALU_ZERO | CC_ALU_OVERFLOW | CC_ALU_NEGATIVE | CC_ALU_CARRY);
const uint32 result = src2 >> nuance.fields[FIELD_ALU_SRC1];
mpe.regs[nuance.fields[FIELD_ALU_DEST]] = result;
// carry = bit 0 of source
mpe.cc |= ((src2 << 1) & CC_ALU_CARRY);
if(!result)
{
mpe.cc |= CC_ALU_ZERO;
}
else
{
// negative = bit 31 of result
mpe.cc |= ((result >> 28) & CC_ALU_NEGATIVE);
}
}
void Execute_ROT(MPE &mpe, const uint32 pRegs[48], const Nuance &nuance)
{
uint32 src1 = pRegs[nuance.fields[FIELD_ALU_SRC1]] & 0x3FUL;
const uint32 src2 = pRegs[nuance.fields[FIELD_ALU_SRC2]];
mpe.cc &= ~(CC_ALU_ZERO | CC_ALU_OVERFLOW | CC_ALU_NEGATIVE);
if(src1 & 0x20)
{
//shift left
src1 = 64UL - src1;
const uint32 result = _lrotl(src2,src1);
mpe.regs[nuance.fields[FIELD_ALU_DEST]] = result;
if(!result)
{
mpe.cc |= CC_ALU_ZERO;
}
else
{
// negative = bit 31 of result
mpe.cc |= ((result >> 28) & CC_ALU_NEGATIVE);
}
}
else
{
const uint32 result = _lrotr(src2,src1);
mpe.regs[nuance.fields[FIELD_ALU_DEST]] = result;
if(!result)
{
mpe.cc |= CC_ALU_ZERO;
}
else
{
// negative = bit 31 of result
mpe.cc |= ((result >> 28) & CC_ALU_NEGATIVE);
}
}
}
void Execute_ROL(MPE &mpe, const uint32 pRegs[48], const Nuance &nuance)
{
const uint32 src2 = pRegs[nuance.fields[FIELD_ALU_SRC2]];
mpe.cc &= ~(CC_ALU_ZERO | CC_ALU_OVERFLOW | CC_ALU_NEGATIVE);
const uint32 result = _lrotl(src2, nuance.fields[FIELD_ALU_SRC1]);
mpe.regs[nuance.fields[FIELD_ALU_DEST]] = result;
if(!result)
{
mpe.cc |= CC_ALU_ZERO;
}
else
{
// negative = bit 31 of result
mpe.cc |= ((result >> 28) & CC_ALU_NEGATIVE);
}
}
void Execute_ROR(MPE &mpe, const uint32 pRegs[48], const Nuance &nuance)
{
const uint32 src2 = pRegs[nuance.fields[FIELD_ALU_SRC2]];
mpe.cc &= ~(CC_ALU_ZERO | CC_ALU_OVERFLOW | CC_ALU_NEGATIVE);
const uint32 result = _lrotr(src2, nuance.fields[FIELD_ALU_SRC1]);
mpe.regs[nuance.fields[FIELD_ALU_DEST]] = result;
if(!result)
{
mpe.cc |= CC_ALU_ZERO;
}
else
{
// negative = bit 31 of result
mpe.cc |= ((result >> 28) & CC_ALU_NEGATIVE);
}
}
void Execute_ADD_P(MPE &mpe, const uint32 pRegs[48], const Nuance &nuance)
{
const uint32 src1 = nuance.fields[FIELD_ALU_SRC1];
const uint32 src2 = nuance.fields[FIELD_ALU_SRC2];
const uint32 dest = nuance.fields[FIELD_ALU_DEST];
mpe.regs[dest + 0] =
(pRegs[src2 + 0] & 0xFFFF0000) +
(pRegs[src1 + 0] & 0xFFFF0000);
mpe.regs[dest + 1] =
(pRegs[src2 + 1] & 0xFFFF0000) +
(pRegs[src1 + 1] & 0xFFFF0000);
mpe.regs[dest + 2] =
(pRegs[src2 + 2] & 0xFFFF0000) +
(pRegs[src1 + 2] & 0xFFFF0000);
}
void Execute_SUB_P(MPE &mpe, const uint32 pRegs[48], const Nuance &nuance)
{
const uint32 src1 = nuance.fields[FIELD_ALU_SRC1];
const uint32 src2 = nuance.fields[FIELD_ALU_SRC2];
const uint32 dest = nuance.fields[FIELD_ALU_DEST];
mpe.regs[dest + 0] =
(pRegs[src2 + 0] & 0xFFFF0000) -
(pRegs[src1 + 0] & 0xFFFF0000);
mpe.regs[dest + 1] =
(pRegs[src2 + 1] & 0xFFFF0000) -
(pRegs[src1 + 1] & 0xFFFF0000);
mpe.regs[dest + 2] =
(pRegs[src2 + 2] & 0xFFFF0000) -
(pRegs[src1 + 2] & 0xFFFF0000);
}
void Execute_ADD_SV(MPE &mpe, const uint32 pRegs[48], const Nuance &nuance)
{
const uint32 src1 = nuance.fields[FIELD_ALU_SRC1];
const uint32 src2 = nuance.fields[FIELD_ALU_SRC2];
const uint32 dest = nuance.fields[FIELD_ALU_DEST];
mpe.regs[dest + 0] =
(pRegs[src2 + 0] & 0xFFFF0000) +
(pRegs[src1 + 0] & 0xFFFF0000);
mpe.regs[dest + 1] =
(pRegs[src2 + 1] & 0xFFFF0000) +
(pRegs[src1 + 1] & 0xFFFF0000);
mpe.regs[dest + 2] =
(pRegs[src2 + 2] & 0xFFFF0000) +
(pRegs[src1 + 2] & 0xFFFF0000);
mpe.regs[dest + 3] =
(pRegs[src2 + 3] & 0xFFFF0000) +
(pRegs[src1 + 3] & 0xFFFF0000);
}
void Execute_SUB_SV(MPE &mpe, const uint32 pRegs[48], const Nuance &nuance)
{
const uint32 src1 = nuance.fields[FIELD_ALU_SRC1];
const uint32 src2 = nuance.fields[FIELD_ALU_SRC2];
const uint32 dest = nuance.fields[FIELD_ALU_DEST];
mpe.regs[dest + 0] =
(pRegs[src2 + 0] & 0xFFFF0000) -
(pRegs[src1 + 0] & 0xFFFF0000);
mpe.regs[dest + 1] =
(pRegs[src2 + 1] & 0xFFFF0000) -
(pRegs[src1 + 1] & 0xFFFF0000);
mpe.regs[dest + 2] =
(pRegs[src2 + 2] & 0xFFFF0000) -
(pRegs[src1 + 2] & 0xFFFF0000);
mpe.regs[dest + 3] =
(pRegs[src2 + 3] & 0xFFFF0000) -
(pRegs[src1 + 3] & 0xFFFF0000);
}
void Execute_ADDImmediate(MPE &mpe, const uint32 pRegs[48], const Nuance &nuance)
{
const uint32 src1 = nuance.fields[FIELD_ALU_SRC1];
const uint32 src2 = pRegs[nuance.fields[FIELD_ALU_SRC2]];
mpe.cc &= ~(CC_ALU_ZERO | CC_ALU_NEGATIVE | CC_ALU_OVERFLOW | CC_ALU_CARRY);
uint32 result;
mpe.cc |= _addcarry_u32(0, src1, src2, &result) ? CC_ALU_CARRY : 0;
if((~(src1 ^ src2)) & (src1 ^ result) & 0x80000000u)
{
mpe.cc |= CC_ALU_OVERFLOW;
}
if(result & 0x80000000u)
{
mpe.cc |= CC_ALU_NEGATIVE;
}
if(!result)
{
mpe.cc |= CC_ALU_ZERO;
}
mpe.regs[nuance.fields[FIELD_ALU_DEST]] = result;
}
void Execute_ADDScalar(MPE &mpe, const uint32 pRegs[48], const Nuance &nuance)
{
const uint32 src1 = pRegs[nuance.fields[FIELD_ALU_SRC1]];
const uint32 src2 = pRegs[nuance.fields[FIELD_ALU_SRC2]];
mpe.cc &= ~(CC_ALU_ZERO | CC_ALU_NEGATIVE | CC_ALU_OVERFLOW | CC_ALU_CARRY);
uint32 result;
mpe.cc |= _addcarry_u32(0, src1, src2, &result) ? CC_ALU_CARRY : 0;
if((~(src1 ^ src2)) & (src1 ^ result) & 0x80000000u)
{
mpe.cc |= CC_ALU_OVERFLOW;
}
if(result & 0x80000000u)
{
mpe.cc |= CC_ALU_NEGATIVE;
}
if(!result)
{
mpe.cc |= CC_ALU_ZERO;
}
mpe.regs[nuance.fields[FIELD_ALU_DEST]] = result;
}
void Execute_ADDScalarShiftRightImmediate(MPE &mpe, const uint32 pRegs[48], const Nuance &nuance)
{
const uint32 src1 = ((int32)pRegs[nuance.fields[FIELD_ALU_SRC1]]) >> nuance.fields[FIELD_ALU_SRC2];
const uint32 src2 = pRegs[nuance.fields[FIELD_ALU_DEST]];
mpe.cc &= ~(CC_ALU_ZERO | CC_ALU_NEGATIVE | CC_ALU_OVERFLOW | CC_ALU_CARRY);
uint32 result;
mpe.cc |= _addcarry_u32(0, src1, src2, &result) ? CC_ALU_CARRY : 0;
if((~(src1 ^ src2)) & (src1 ^ result) & 0x80000000u)
{
mpe.cc |= CC_ALU_OVERFLOW;
}
if(result & 0x80000000u)
{
mpe.cc |= CC_ALU_NEGATIVE;
}
if(!result)
{
mpe.cc |= CC_ALU_ZERO;
}
mpe.regs[nuance.fields[FIELD_ALU_DEST]] = result;
}
void Execute_ADDScalarShiftLeftImmediate(MPE &mpe, const uint32 pRegs[48], const Nuance &nuance)
{
const uint32 src1 = pRegs[nuance.fields[FIELD_ALU_SRC1]] << nuance.fields[FIELD_ALU_SRC2]; // do not cast to u64 before shift!
const uint32 src2 = pRegs[nuance.fields[FIELD_ALU_DEST]];
mpe.cc &= ~(CC_ALU_ZERO | CC_ALU_NEGATIVE | CC_ALU_OVERFLOW | CC_ALU_CARRY);
uint32 result;
mpe.cc |= _addcarry_u32(0, src1, src2, &result) ? CC_ALU_CARRY : 0;
if((~(src1 ^ src2)) & (src1 ^ result) & 0x80000000u)
{
mpe.cc |= CC_ALU_OVERFLOW;
}
if(result & 0x80000000u)
{
mpe.cc |= CC_ALU_NEGATIVE;
}
if(!result)
{
mpe.cc |= CC_ALU_ZERO;
}
mpe.regs[nuance.fields[FIELD_ALU_DEST]] = result;
}
void Execute_SUBImmediate(MPE &mpe, const uint32 pRegs[48], const Nuance &nuance)
{
const uint32 src1 = nuance.fields[FIELD_ALU_SRC1];
const uint32 src2 = pRegs[nuance.fields[FIELD_ALU_SRC2]];
mpe.cc &= ~(CC_ALU_ZERO | CC_ALU_NEGATIVE | CC_ALU_OVERFLOW | CC_ALU_CARRY);
uint32 result;
mpe.cc |= _subborrow_u32(0, src2, src1, &result) ? CC_ALU_CARRY : 0;
if((src1 ^ src2) & (src2 ^ result) & 0x80000000u)
{
mpe.cc |= CC_ALU_OVERFLOW;
}
if(result & 0x80000000u)
{
mpe.cc |= CC_ALU_NEGATIVE;
}
if(!result)
{
mpe.cc |= CC_ALU_ZERO;
}
mpe.regs[nuance.fields[FIELD_ALU_DEST]] = result;
}
void Execute_SUBImmediateReverse(MPE &mpe, const uint32 pRegs[48], const Nuance &nuance)
{
const uint32 src1 = pRegs[nuance.fields[FIELD_ALU_SRC1]];
const uint32 src2 = nuance.fields[FIELD_ALU_SRC2];
mpe.cc &= ~(CC_ALU_ZERO | CC_ALU_NEGATIVE | CC_ALU_OVERFLOW | CC_ALU_CARRY);
uint32 result;
mpe.cc |= _subborrow_u32(0, src2, src1, &result) ? CC_ALU_CARRY : 0;
if((src1 ^ src2) & (src2 ^ result) & 0x80000000u)
{
mpe.cc |= CC_ALU_OVERFLOW;
}
if(result & 0x80000000u)
{
mpe.cc |= CC_ALU_NEGATIVE;
}
if(!result)
{
mpe.cc |= CC_ALU_ZERO;
}
mpe.regs[nuance.fields[FIELD_ALU_DEST]] = result;
}
void Execute_SUBScalar(MPE &mpe, const uint32 pRegs[48], const Nuance &nuance)
{
const uint32 src1 = pRegs[nuance.fields[FIELD_ALU_SRC1]];
const uint32 src2 = pRegs[nuance.fields[FIELD_ALU_SRC2]];
mpe.cc &= ~(CC_ALU_ZERO | CC_ALU_NEGATIVE | CC_ALU_OVERFLOW | CC_ALU_CARRY);
uint32 result;
mpe.cc |= _subborrow_u32(0, src2, src1, &result) ? CC_ALU_CARRY : 0;
if((src1 ^ src2) & (src2 ^ result) & 0x80000000u)
{
mpe.cc |= CC_ALU_OVERFLOW;
}
if(result & 0x80000000u)
{
mpe.cc |= CC_ALU_NEGATIVE;
}
if(!result)
{
mpe.cc |= CC_ALU_ZERO;
}
mpe.regs[nuance.fields[FIELD_ALU_DEST]] = result;
}
void Execute_SUBScalarShiftRightImmediate(MPE &mpe, const uint32 pRegs[48], const Nuance &nuance)
{
const uint32 src1 = ((int32)pRegs[nuance.fields[FIELD_ALU_SRC1]]) >> nuance.fields[FIELD_ALU_SRC2];
const uint32 src2 = pRegs[nuance.fields[FIELD_ALU_DEST]];
mpe.cc &= ~(CC_ALU_ZERO | CC_ALU_NEGATIVE | CC_ALU_OVERFLOW | CC_ALU_CARRY);
uint32 result;
mpe.cc |= _subborrow_u32(0, src2, src1, &result) ? CC_ALU_CARRY : 0;
if((src1 ^ src2) & (src2 ^ result) & 0x80000000u)
{
mpe.cc |= CC_ALU_OVERFLOW;
}
if(result & 0x80000000u)
{
mpe.cc |= CC_ALU_NEGATIVE;
}
if(!result)
{
mpe.cc |= CC_ALU_ZERO;
}
mpe.regs[nuance.fields[FIELD_ALU_DEST]] = result;
}
void Execute_SUBScalarShiftLeftImmediate(MPE &mpe, const uint32 pRegs[48], const Nuance &nuance)
{
const uint32 src1 = pRegs[nuance.fields[FIELD_ALU_SRC1]] << nuance.fields[FIELD_ALU_SRC2]; // do not cast to u64 before shift!
const uint32 src2 = pRegs[nuance.fields[FIELD_ALU_DEST]];
mpe.cc &= ~(CC_ALU_ZERO | CC_ALU_NEGATIVE | CC_ALU_OVERFLOW | CC_ALU_CARRY);
uint32 result;
mpe.cc |= _subborrow_u32(0, src2, src1, &result) ? CC_ALU_CARRY : 0;
if((src1 ^ src2) & (src2 ^ result) & 0x80000000u)
{
mpe.cc |= CC_ALU_OVERFLOW;
}
if(result & 0x80000000u)
{
mpe.cc |= CC_ALU_NEGATIVE;
}
if(!result)
{
mpe.cc |= CC_ALU_ZERO;
}
mpe.regs[nuance.fields[FIELD_ALU_DEST]] = result;
}
void Execute_CMPImmediate(MPE &mpe, const uint32 pRegs[48], const Nuance &nuance)
{
const uint32 src1 = nuance.fields[FIELD_ALU_SRC1];
const uint32 src2 = pRegs[nuance.fields[FIELD_ALU_SRC2]];
mpe.cc &= ~(CC_ALU_ZERO | CC_ALU_NEGATIVE | CC_ALU_OVERFLOW | CC_ALU_CARRY);
uint32 result;
mpe.cc |= _subborrow_u32(0, src2, src1, &result) ? CC_ALU_CARRY : 0;
if((src1 ^ src2) & (src2 ^ result) & 0x80000000u)
{
mpe.cc |= CC_ALU_OVERFLOW;
}
if(result & 0x80000000u)
{
mpe.cc |= CC_ALU_NEGATIVE;
}
if(!result)
{
mpe.cc |= CC_ALU_ZERO;
}
}
void Execute_CMPImmediateReverse(MPE &mpe, const uint32 pRegs[48], const Nuance &nuance)
{
const uint32 src1 = pRegs[nuance.fields[FIELD_ALU_SRC1]];
const uint32 src2 = nuance.fields[FIELD_ALU_SRC2];
mpe.cc &= ~(CC_ALU_ZERO | CC_ALU_NEGATIVE | CC_ALU_OVERFLOW | CC_ALU_CARRY);
uint32 result;
mpe.cc |= _subborrow_u32(0, src2, src1, &result) ? CC_ALU_CARRY : 0;
if((src1 ^ src2) & (src2 ^ result) & 0x80000000u)
{
mpe.cc |= CC_ALU_OVERFLOW;
}
if(result & 0x80000000u)
{
mpe.cc |= CC_ALU_NEGATIVE;
}
if(!result)
{
mpe.cc |= CC_ALU_ZERO;
}
}
void Execute_CMPScalar(MPE &mpe, const uint32 pRegs[48], const Nuance &nuance)
{
const uint32 src1 = pRegs[nuance.fields[FIELD_ALU_SRC1]];
const uint32 src2 = pRegs[nuance.fields[FIELD_ALU_SRC2]];
mpe.cc &= ~(CC_ALU_ZERO | CC_ALU_NEGATIVE | CC_ALU_OVERFLOW | CC_ALU_CARRY);
uint32 result;
mpe.cc |= _subborrow_u32(0, src2, src1, &result) ? CC_ALU_CARRY : 0;
if((src1 ^ src2) & (src2 ^ result) & 0x80000000u)
{
mpe.cc |= CC_ALU_OVERFLOW;
}
if(result & 0x80000000u)
{
mpe.cc |= CC_ALU_NEGATIVE;
}
if(!result)
{
mpe.cc |= CC_ALU_ZERO;
}
}
void Execute_CMPScalarShiftRightImmediate(MPE &mpe, const uint32 pRegs[48], const Nuance &nuance)
{
const uint32 src1 = ((int32)pRegs[nuance.fields[FIELD_ALU_SRC1]]) >> nuance.fields[FIELD_ALU_SRC2];
const uint32 src2 = pRegs[nuance.fields[FIELD_ALU_DEST]];
mpe.cc &= ~(CC_ALU_ZERO | CC_ALU_NEGATIVE | CC_ALU_OVERFLOW | CC_ALU_CARRY);
uint32 result;
mpe.cc |= _subborrow_u32(0, src2, src1, &result) ? CC_ALU_CARRY : 0;
if((src1 ^ src2) & (src2 ^ result) & 0x80000000u)
{
mpe.cc |= CC_ALU_OVERFLOW;
}
if(result & 0x80000000u)
{
mpe.cc |= CC_ALU_NEGATIVE;
}
if(!result)
{
mpe.cc |= CC_ALU_ZERO;
}
}
void Execute_CMPScalarShiftLeftImmediate(MPE &mpe, const uint32 pRegs[48], const Nuance &nuance)
{
const uint32 src1 = pRegs[nuance.fields[FIELD_ALU_SRC1]] << nuance.fields[FIELD_ALU_SRC2]; // do not cast to u64 before shift!
const uint32 src2 = pRegs[nuance.fields[FIELD_ALU_DEST]];
mpe.cc &= ~(CC_ALU_ZERO | CC_ALU_NEGATIVE | CC_ALU_OVERFLOW | CC_ALU_CARRY);
uint32 result;
mpe.cc |= _subborrow_u32(0, src2, src1, &result) ? CC_ALU_CARRY : 0;
if((src1 ^ src2) & (src2 ^ result) & 0x80000000u)
{
mpe.cc |= CC_ALU_OVERFLOW;
}
if(result & 0x80000000u)
{
mpe.cc |= CC_ALU_NEGATIVE;
}
if(!result)
{
mpe.cc |= CC_ALU_ZERO;
}
}
void Execute_ANDImmediate(MPE &mpe, const uint32 pRegs[48], const Nuance &nuance)
{
mpe.cc &= ~(CC_ALU_ZERO | CC_ALU_NEGATIVE | CC_ALU_OVERFLOW);
const uint32 src1 = nuance.fields[FIELD_ALU_SRC1];
const uint32 src2 = pRegs[nuance.fields[FIELD_ALU_SRC2]];
const uint32 result = src1 & src2;
mpe.regs[nuance.fields[FIELD_ALU_DEST]] = result;
if(!result)
{
mpe.cc |= CC_ALU_ZERO;
}
else
{
mpe.cc |= ((result >> 28) & CC_ALU_NEGATIVE);
}
}
void Execute_ANDScalar(MPE &mpe, const uint32 pRegs[48], const Nuance &nuance)
{
mpe.cc &= ~(CC_ALU_ZERO | CC_ALU_NEGATIVE | CC_ALU_OVERFLOW);
const uint32 src1 = pRegs[nuance.fields[FIELD_ALU_SRC1]];
const uint32 src2 = pRegs[nuance.fields[FIELD_ALU_SRC2]];
const uint32 result = src1 & src2;
mpe.regs[nuance.fields[FIELD_ALU_DEST]] = result;
if(!result)
{
mpe.cc |= CC_ALU_ZERO;
}
else
{
mpe.cc |= ((result >> 28) & CC_ALU_NEGATIVE);
}
}
void Execute_ANDImmediateShiftScalar(MPE &mpe, const uint32 pRegs[48], const Nuance &nuance)
{
mpe.cc &= ~(CC_ALU_ZERO | CC_ALU_NEGATIVE | CC_ALU_OVERFLOW);
const uint32 src1 = nuance.fields[FIELD_ALU_SRC1];
const uint32 src2 = (((int32)(pRegs[nuance.fields[FIELD_ALU_SRC2]] << 26)) >> 26) & 0x3FUL;
uint32 dest = pRegs[nuance.fields[FIELD_ALU_DEST]];
if(src2 & 0x20)
{
dest &= (src1 << (64UL - src2));
}
else
{
dest &= (src1 >> src2);
}
mpe.regs[nuance.fields[FIELD_ALU_DEST]] = dest;
if(!dest)
{
mpe.cc |= CC_ALU_ZERO;
}
else
{
mpe.cc |= ((dest >> 28) & CC_ALU_NEGATIVE);
}
}
void Execute_ANDScalarShiftRightImmediate(MPE &mpe, const uint32 pRegs[48], const Nuance &nuance)
{
mpe.cc &= ~(CC_ALU_ZERO | CC_ALU_NEGATIVE | CC_ALU_OVERFLOW);
const uint32 src1 = pRegs[nuance.fields[FIELD_ALU_SRC1]];
const uint32 src2 = nuance.fields[FIELD_ALU_SRC2];
uint32 dest = pRegs[nuance.fields[FIELD_ALU_DEST]];
dest &= (src1 >> src2);
mpe.regs[nuance.fields[FIELD_ALU_DEST]] = dest;
if(!dest)
{
mpe.cc |= CC_ALU_ZERO;
}
else
{
mpe.cc |= ((dest >> 28) & CC_ALU_NEGATIVE);
}
}
void Execute_ANDScalarShiftLeftImmediate(MPE &mpe, const uint32 pRegs[48], const Nuance &nuance)
{
mpe.cc &= ~(CC_ALU_ZERO | CC_ALU_NEGATIVE | CC_ALU_OVERFLOW);
const uint32 src1 = pRegs[nuance.fields[FIELD_ALU_SRC1]];
const uint32 src2 = nuance.fields[FIELD_ALU_SRC2];