reals do not fit in XMM registers (#21288)

Author: WalterBright

compiler/src/dmd/backend/x86/cod4.d

@@ -4666,7 +4666,7 @@ void cdpair(ref CGstate cg, ref CodeBuilder cdb, elem* e, ref regm_t pretregs)
     regm_t retregs = pretregs;
     if (retregs == mPSW && tycomplex(e.Ety) && config.inline8087)
     {
-        if (config.fpxmmregs)
+        if (config.fpxmmregs && tysize(e.Ety) < 20)
             retregs |= mXMM0 | mXMM1;
         else
             retregs |= mST01;

compiler/src/dmd/e2ir.d

@@ -1765,7 +1765,7 @@ elem* toElem(Expression e, ref IRState irs)
                 op = OPpair;
             else if (ty == Tcomplex32 && ty1 == Timaginary32 && ty2 == Tfloat32 ||
                      ty == Tcomplex64 && ty1 == Timaginary64 && ty2 == Tfloat64 ||
-                     0 && ty == Tcomplex80 && ty1 == Timaginary80 && ty2 == Tfloat80)
+                     ty == Tcomplex80 && ty1 == Timaginary80 && ty2 == Tfloat80)
                 op = OPrpair;
         }