message: Emulate compare simd intrinsics
diff: @@ -156,6 +156,25 @@ fn simd_for_each_lane<'tcx, B: Backend>(
  }
  macro_rules! simd_binop {
  + ($fx:expr, $intrinsic:expr, icmp($cc:ident, $x:ident, $y:ident) -> $ret:ident) => {
  + simd_for_each_lane($fx, $intrinsic, $x, $y, $ret, |fx, _lane_layout, ret_lane_layout, x_lane, y_lane| {
  + let res_lane = fx.bcx.ins().icmp(IntCC::$cc, x_lane, y_lane);
  + let res_lane = fx.bcx.ins().bint(types::I8, res_lane);
  + CValue::by_val(res_lane, ret_lane_layout)
  + });
  + };
  + ($fx:expr, $intrinsic:expr, icmp($cc_u:ident|$cc_s:ident, $x:ident, $y:ident) -> $ret:ident) => {
  + simd_for_each_lane($fx, $intrinsic, $x, $y, $ret, |fx, lane_layout, ret_lane_layout, x_lane, y_lane| {
  + let res_lane = match lane_layout.ty.sty {
  + ty::Uint(_) => fx.bcx.ins().icmp(IntCC::$cc_u, x_lane, y_lane),
  + ty::Int(_) => fx.bcx.ins().icmp(IntCC::$cc_s, x_lane, y_lane),
  + _ => unreachable!("{:?}", lane_layout.ty),
  + };
  + let res_lane = fx.bcx.ins().bint(types::I8, res_lane);
  + CValue::by_val(res_lane, ret_lane_layout)
  + });
  + };
  +
  ($fx:expr, $intrinsic:expr, $op:ident($x:ident, $y:ident) -> $ret:ident) => {
  simd_for_each_lane($fx, $intrinsic, $x, $y, $ret, |fx, _lane_layout, ret_lane_layout, x_lane, y_lane| {
  let res_lane = fx.bcx.ins().$op(x_lane, y_lane);
  @@ -753,6 +772,25 @@ fn swap(bcx: &mut FunctionBuilder, v: Value) -> Value {
  ret.write_cvalue(fx, x.unchecked_cast_to(ret.layout()));
  };
  + simd_eq, (c x, c y) {
  + simd_binop!(fx, intrinsic, icmp(Equal, x, y) -> ret);
  + };
  + simd_ne, (c x, c y) {
  + simd_binop!(fx, intrinsic, icmp(NotEqual, x, y) -> ret);
  + };
  + simd_lt, (c x, c y) {
  + simd_binop!(fx, intrinsic, icmp(UnsignedLessThan|SignedLessThan, x, y) -> ret);
  + };
  + simd_le, (c x, c y) {
  + simd_binop!(fx, intrinsic, icmp(UnsignedLessThanOrEqual|SignedLessThanOrEqual, x, y) -> ret);
  + };
  + simd_gt, (c x, c y) {
  + simd_binop!(fx, intrinsic, icmp(UnsignedGreaterThan|SignedGreaterThan, x, y) -> ret);
  + };
  + simd_ge, (c x, c y) {
  + simd_binop!(fx, intrinsic, icmp(UnsignedGreaterThanOrEqual|SignedGreaterThanOrEqual, x, y) -> ret);
  + };
  +
  simd_add, (c x, c y) {
  simd_binop!(fx, intrinsic, iadd(x, y) -> ret);
  };
  