Example #1
0
// Extend Sign Half Word
static bool
extsh(PPCEmuAssembler& a, Instruction instr)
{
   a.mov(a.eax, a.ppcgpr[instr.rS]);

   a.movsx(a.eax, a.eax.r16());

   a.mov(a.ppcgpr[instr.rA], a.eax);

   if (instr.rc) {
      updateConditionRegister(a, a.eax, a.ecx, a.edx);
   }

   return true;
}
Example #2
0
static bool
loadGeneric(PPCEmuAssembler& a, Instruction instr)
{
   if ((flags & LoadZeroRA) && instr.rA == 0) {
      a.mov(a.ecx, 0u);
   }
   else {
      a.mov(a.ecx, a.ppcgpr[instr.rA]);
   }

   if (flags & LoadIndexed) {
      a.add(a.ecx, a.ppcgpr[instr.rB]);
   }
   else {
      a.add(a.ecx, sign_extend<16, int32_t>(instr.d));
   }

   a.mov(a.zdx, a.zcx);
   a.add(a.zdx, a.membase);
   if (sizeof(Type) == 1) {
      a.mov(a.eax, 0);
      a.mov(a.eax.r8(), asmjit::X86Mem(a.zdx, 0));
   } else if (sizeof(Type) == 2) {
      a.mov(a.eax, 0);
      a.mov(a.eax.r16(), asmjit::X86Mem(a.zdx, 0));
      if (!(flags & LoadByteReverse)) {
         a.xchg(a.eax.r8Hi(), a.eax.r8Lo());
      }
   } else if (sizeof(Type) == 4) {
      a.mov(a.eax, asmjit::X86Mem(a.zdx, 0));
      if (!(flags & LoadByteReverse)) {
         a.bswap(a.eax);
      }
   } else if (sizeof(Type) == 8) {
      a.mov(a.zax, asmjit::X86Mem(a.zdx, 0));
      if (!(flags & LoadByteReverse)) {
         a.bswap(a.zax);
      }
   } else {
      assert(0);
   }

   if (std::is_floating_point<Type>::value) {
      if (flags & LoadPairedSingles) {
         a.mov(a.ppcfprps[instr.rD][0], a.eax);
         a.mov(a.ppcfprps[instr.rD][1], a.eax);
      }
      else {
         assert(sizeof(Type) == 8);
         a.mov(a.ppcfpr[instr.rD], a.zax);
      }
   }
   else {
      if (flags & LoadSignExtend) {
         assert(sizeof(Type) == 2);
         a.movsx(a.eax, a.eax.r16());
      }

      a.mov(a.ppcgpr[instr.rD], a.eax);
   }

   if (flags & LoadReserve) {
      a.mov(a.ppcreserve, 1u);
      a.mov(a.ppcreserveAddress, a.ecx);
   }

   if (flags & LoadUpdate) {
      a.mov(a.ppcgpr[instr.rA], a.ecx);
   }
   return true;
}