-//! Replaces 128-bit operators with lang item calls
+//! Replaces 128-bit operators with lang item calls where necessary
+
+use cranelift_codegen::ir::ArgumentPurpose;
use crate::prelude::*;
-pub fn maybe_codegen<'a, 'tcx>(
- fx: &mut FunctionCx<'a, 'tcx, impl Backend>,
+pub(crate) fn maybe_codegen<'tcx>(
+ fx: &mut FunctionCx<'_, '_, 'tcx>,
bin_op: BinOp,
checked: bool,
- is_signed: bool,
lhs: CValue<'tcx>,
rhs: CValue<'tcx>,
- out_ty: Ty<'tcx>,
) -> Option<CValue<'tcx>> {
- if lhs.layout().ty != fx.tcx.types.u128 && lhs.layout().ty != fx.tcx.types.i128 {
+ if lhs.layout().ty != fx.tcx.types.u128
+ && lhs.layout().ty != fx.tcx.types.i128
+ && rhs.layout().ty != fx.tcx.types.u128
+ && rhs.layout().ty != fx.tcx.types.i128
+ {
return None;
}
- let lhs_val = lhs.load_scalar(fx);
- let rhs_val = rhs.load_scalar(fx);
+ let is_signed = type_sign(lhs.layout().ty);
match bin_op {
- BinOp::Add | BinOp::Sub | BinOp::BitAnd | BinOp::BitOr | BinOp::BitXor => return None,
- BinOp::Offset => unreachable!("offset should only be used on pointers, not 128bit ints"),
- BinOp::Mul => {
- let res = if checked {
- if is_signed {
- let oflow_place = CPlace::new_stack_slot(fx, fx.tcx.types.i32);
- let oflow_addr = oflow_place.to_addr(fx);
- let oflow_addr = CValue::by_val(oflow_addr, fx.layout_of(fx.tcx.mk_mut_ptr(fx.tcx.types.i32)));
- let val = fx.easy_call("__muloti4", &[lhs, rhs, oflow_addr], fx.tcx.types.i128);
- let val = val.load_scalar(fx);
- let oflow = oflow_place.to_cvalue(fx).load_scalar(fx);
- let oflow = fx.bcx.ins().icmp_imm(IntCC::NotEqual, oflow, 0);
- let oflow = fx.bcx.ins().bint(types::I8, oflow);
- CValue::by_val_pair(val, oflow, fx.layout_of(out_ty))
+ BinOp::BitAnd | BinOp::BitOr | BinOp::BitXor => {
+ assert!(!checked);
+ None
+ }
+ BinOp::Add | BinOp::Sub if !checked => None,
+ BinOp::Mul if !checked || is_signed => {
+ if !checked {
+ let val_ty = if is_signed { fx.tcx.types.i128 } else { fx.tcx.types.u128 };
+ if fx.tcx.sess.target.is_like_windows {
+ let ret_place = CPlace::new_stack_slot(fx, lhs.layout());
+ let (lhs_ptr, lhs_extra) = lhs.force_stack(fx);
+ let (rhs_ptr, rhs_extra) = rhs.force_stack(fx);
+ assert!(lhs_extra.is_none());
+ assert!(rhs_extra.is_none());
+ let args = [
+ ret_place.to_ptr().get_addr(fx),
+ lhs_ptr.get_addr(fx),
+ rhs_ptr.get_addr(fx),
+ ];
+ fx.lib_call(
+ "__multi3",
+ vec![
+ AbiParam::special(fx.pointer_type, ArgumentPurpose::StructReturn),
+ AbiParam::new(fx.pointer_type),
+ AbiParam::new(fx.pointer_type),
+ ],
+ vec![],
+ &args,
+ );
+ Some(ret_place.to_cvalue(fx))
} else {
- // FIXME implement it
- let out_layout = fx.layout_of(out_ty);
- return Some(crate::trap::trap_unreachable_ret_value(fx, out_layout, format!("unimplemented 128bit checked binop unsigned mul")));
+ Some(fx.easy_call("__multi3", &[lhs, rhs], val_ty))
}
} else {
- let val_ty = if is_signed { fx.tcx.types.i128 } else { fx.tcx.types.u128 };
- fx.easy_call("__multi3", &[lhs, rhs], val_ty)
- };
- return Some(res);
+ let out_ty = fx.tcx.mk_tup([lhs.layout().ty, fx.tcx.types.bool].iter());
+ let oflow = CPlace::new_stack_slot(fx, fx.layout_of(fx.tcx.types.i32));
+ let lhs = lhs.load_scalar(fx);
+ let rhs = rhs.load_scalar(fx);
+ let oflow_ptr = oflow.to_ptr().get_addr(fx);
+ let res = fx.lib_call(
+ "__muloti4",
+ vec![
+ AbiParam::new(types::I128),
+ AbiParam::new(types::I128),
+ AbiParam::new(fx.pointer_type),
+ ],
+ vec![AbiParam::new(types::I128)],
+ &[lhs, rhs, oflow_ptr],
+ )[0];
+ let oflow = oflow.to_cvalue(fx).load_scalar(fx);
+ let oflow = fx.bcx.ins().ireduce(types::I8, oflow);
+ Some(CValue::by_val_pair(res, oflow, fx.layout_of(out_ty)))
+ }
}
- BinOp::Div => {
- let res = if checked {
- // FIXME implement it
- let out_layout = fx.layout_of(out_ty);
- return Some(crate::trap::trap_unreachable_ret_value(fx, out_layout, format!("unimplemented 128bit checked binop div")));
+ BinOp::Add | BinOp::Sub | BinOp::Mul => {
+ assert!(checked);
+ let out_ty = fx.tcx.mk_tup([lhs.layout().ty, fx.tcx.types.bool].iter());
+ let out_place = CPlace::new_stack_slot(fx, fx.layout_of(out_ty));
+ let (param_types, args) = if fx.tcx.sess.target.is_like_windows {
+ let (lhs_ptr, lhs_extra) = lhs.force_stack(fx);
+ let (rhs_ptr, rhs_extra) = rhs.force_stack(fx);
+ assert!(lhs_extra.is_none());
+ assert!(rhs_extra.is_none());
+ (
+ vec![
+ AbiParam::special(fx.pointer_type, ArgumentPurpose::StructReturn),
+ AbiParam::new(fx.pointer_type),
+ AbiParam::new(fx.pointer_type),
+ ],
+ [out_place.to_ptr().get_addr(fx), lhs_ptr.get_addr(fx), rhs_ptr.get_addr(fx)],
+ )
} else {
- if is_signed {
- fx.easy_call("__divti3", &[lhs, rhs], fx.tcx.types.i128)
- } else {
- fx.easy_call("__udivti3", &[lhs, rhs], fx.tcx.types.u128)
- }
+ (
+ vec![
+ AbiParam::special(fx.pointer_type, ArgumentPurpose::StructReturn),
+ AbiParam::new(types::I128),
+ AbiParam::new(types::I128),
+ ],
+ [out_place.to_ptr().get_addr(fx), lhs.load_scalar(fx), rhs.load_scalar(fx)],
+ )
};
- return Some(res);
- }
- BinOp::Rem => {
- let res = if checked {
- // FIXME implement it
- let out_layout = fx.layout_of(out_ty);
- return Some(crate::trap::trap_unreachable_ret_value(fx, out_layout, format!("unimplemented 128bit checked binop rem")));
- } else {
- if is_signed {
- fx.easy_call("__modti3", &[lhs, rhs], fx.tcx.types.i128)
- } else {
- fx.easy_call("__umodti3", &[lhs, rhs], fx.tcx.types.u128)
- }
+ let name = match (bin_op, is_signed) {
+ (BinOp::Add, false) => "__rust_u128_addo",
+ (BinOp::Add, true) => "__rust_i128_addo",
+ (BinOp::Sub, false) => "__rust_u128_subo",
+ (BinOp::Sub, true) => "__rust_i128_subo",
+ (BinOp::Mul, false) => "__rust_u128_mulo",
+ _ => unreachable!(),
};
- return Some(res);
+ fx.lib_call(name, param_types, vec![], &args);
+ Some(out_place.to_cvalue(fx))
}
- BinOp::Lt | BinOp::Le | BinOp::Eq | BinOp::Ge | BinOp::Gt | BinOp::Ne => {
+ BinOp::Offset => unreachable!("offset should only be used on pointers, not 128bit ints"),
+ BinOp::Div | BinOp::Rem => {
assert!(!checked);
- let (lhs_lsb, lhs_msb) = fx.bcx.ins().isplit(lhs_val);
- let (rhs_lsb, rhs_msb) = fx.bcx.ins().isplit(rhs_val);
- let res = match (bin_op, is_signed) {
- (BinOp::Eq, _) => {
- let lsb_eq = fx.bcx.ins().icmp(IntCC::Equal, lhs_lsb, rhs_lsb);
- let msb_eq = fx.bcx.ins().icmp(IntCC::Equal, lhs_msb, rhs_msb);
- fx.bcx.ins().band(lsb_eq, msb_eq)
- }
- (BinOp::Ne, _) => {
- let lsb_ne = fx.bcx.ins().icmp(IntCC::NotEqual, lhs_lsb, rhs_lsb);
- let msb_ne = fx.bcx.ins().icmp(IntCC::NotEqual, lhs_msb, rhs_msb);
- fx.bcx.ins().bor(lsb_ne, msb_ne)
- }
- _ => {
- // FIXME implement it
- let out_layout = fx.layout_of(out_ty);
- return Some(crate::trap::trap_unreachable_ret_value(fx, out_layout, format!("unimplemented 128bit binop {:?}", bin_op)));
- },
+ let name = match (bin_op, is_signed) {
+ (BinOp::Div, false) => "__udivti3",
+ (BinOp::Div, true) => "__divti3",
+ (BinOp::Rem, false) => "__umodti3",
+ (BinOp::Rem, true) => "__modti3",
+ _ => unreachable!(),
};
-
- let res = fx.bcx.ins().bint(types::I8, res);
- let res = CValue::by_val(res, fx.layout_of(fx.tcx.types.bool));
- return Some(res);
+ if fx.tcx.sess.target.is_like_windows {
+ let (lhs_ptr, lhs_extra) = lhs.force_stack(fx);
+ let (rhs_ptr, rhs_extra) = rhs.force_stack(fx);
+ assert!(lhs_extra.is_none());
+ assert!(rhs_extra.is_none());
+ let args = [lhs_ptr.get_addr(fx), rhs_ptr.get_addr(fx)];
+ let ret = fx.lib_call(
+ name,
+ vec![AbiParam::new(fx.pointer_type), AbiParam::new(fx.pointer_type)],
+ vec![AbiParam::new(types::I64X2)],
+ &args,
+ )[0];
+ // FIXME use bitcast instead of store to get from i64x2 to i128
+ let ret_place = CPlace::new_stack_slot(fx, lhs.layout());
+ ret_place.to_ptr().store(fx, ret, MemFlags::trusted());
+ Some(ret_place.to_cvalue(fx))
+ } else {
+ Some(fx.easy_call(name, &[lhs, rhs], lhs.layout().ty))
+ }
}
- BinOp::Shl | BinOp::Shr => {
- // FIXME implement it
- let out_layout = fx.layout_of(out_ty);
- return Some(crate::trap::trap_unreachable_ret_value(fx, out_layout, format!("unimplemented 128bit binop {:?}", bin_op)));
+ BinOp::Lt | BinOp::Le | BinOp::Eq | BinOp::Ge | BinOp::Gt | BinOp::Ne => {
+ assert!(!checked);
+ None
}
+ BinOp::Shl | BinOp::Shr => None,
}
}
projects / rust.git / blobdiff