//! Replaces 128-bit operators with lang item calls where necessary
+use cranelift_codegen::ir::ArgumentPurpose;
+
use crate::prelude::*;
pub(crate) fn maybe_codegen<'tcx>(
- fx: &mut FunctionCx<'_, 'tcx, impl Module>,
+ fx: &mut FunctionCx<'_, '_, 'tcx>,
bin_op: BinOp,
checked: bool,
lhs: CValue<'tcx>,
rhs: CValue<'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 {
None
}
BinOp::Add | BinOp::Sub if !checked => None,
- BinOp::Add => {
- let out_ty = fx.tcx.mk_tup([lhs.layout().ty, fx.tcx.types.bool].iter());
- return Some(if is_signed {
- fx.easy_call("__rust_i128_addo", &[lhs, rhs], out_ty)
- } else {
- fx.easy_call("__rust_u128_addo", &[lhs, rhs], out_ty)
- });
- }
- BinOp::Sub => {
- let out_ty = fx.tcx.mk_tup([lhs.layout().ty, fx.tcx.types.bool].iter());
- return Some(if is_signed {
- fx.easy_call("__rust_i128_subo", &[lhs, rhs], out_ty)
- } else {
- fx.easy_call("__rust_u128_subo", &[lhs, rhs], out_ty)
- });
- }
- BinOp::Offset => unreachable!("offset should only be used on pointers, not 128bit ints"),
- BinOp::Mul => {
- let res = if checked {
- let out_ty = fx.tcx.mk_tup([lhs.layout().ty, fx.tcx.types.bool].iter());
- if is_signed {
- fx.easy_call("__rust_i128_mulo", &[lhs, rhs], out_ty)
+ 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 {
- fx.easy_call("__rust_u128_mulo", &[lhs, rhs], out_ty)
+ 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)
- };
- 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 => {
- assert!(!checked);
- if is_signed {
- Some(fx.easy_call("__divti3", &[lhs, rhs], fx.tcx.types.i128))
+ 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 {
- Some(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)],
+ )
+ };
+ 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!(),
+ };
+ fx.lib_call(name, param_types, vec![], &args);
+ Some(out_place.to_cvalue(fx))
}
- BinOp::Rem => {
+ BinOp::Offset => unreachable!("offset should only be used on pointers, not 128bit ints"),
+ BinOp::Div | BinOp::Rem => {
assert!(!checked);
- if is_signed {
- Some(fx.easy_call("__modti3", &[lhs, rhs], fx.tcx.types.i128))
+ let name = match (bin_op, is_signed) {
+ (BinOp::Div, false) => "__udivti3",
+ (BinOp::Div, true) => "__divti3",
+ (BinOp::Rem, false) => "__umodti3",
+ (BinOp::Rem, true) => "__modti3",
+ _ => unreachable!(),
+ };
+ 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("__umodti3", &[lhs, rhs], fx.tcx.types.u128))
+ Some(fx.easy_call(name, &[lhs, rhs], lhs.layout().ty))
}
}
BinOp::Lt | BinOp::Le | BinOp::Eq | BinOp::Ge | BinOp::Gt | BinOp::Ne => {
assert!(!checked);
None
}
- BinOp::Shl | BinOp::Shr => {
- let is_overflow = if checked {
- // rhs >= 128
-
- // FIXME support non 128bit rhs
- /*let (rhs_lsb, rhs_msb) = fx.bcx.ins().isplit(rhs_val);
- let rhs_msb_gt_0 = fx.bcx.ins().icmp_imm(IntCC::NotEqual, rhs_msb, 0);
- let rhs_lsb_ge_128 = fx.bcx.ins().icmp_imm(IntCC::SignedGreaterThan, rhs_lsb, 127);
- let is_overflow = fx.bcx.ins().bor(rhs_msb_gt_0, rhs_lsb_ge_128);*/
- let is_overflow = fx.bcx.ins().bconst(types::B1, false);
-
- Some(fx.bcx.ins().bint(types::I8, is_overflow))
- } else {
- None
- };
-
- // Optimize `val >> 64`, because compiler_builtins uses it to deconstruct an 128bit
- // integer into its lsb and msb.
- // https://github.com/rust-lang-nursery/compiler-builtins/blob/79a6a1603d5672cbb9187ff41ff4d9b5048ac1cb/src/int/mod.rs#L217
- if resolve_value_imm(fx.bcx.func, rhs_val) == Some(64) {
- let (lhs_lsb, lhs_msb) = fx.bcx.ins().isplit(lhs_val);
- let all_zeros = fx.bcx.ins().iconst(types::I64, 0);
- let val = match (bin_op, is_signed) {
- (BinOp::Shr, false) => {
- let val = fx.bcx.ins().iconcat(lhs_msb, all_zeros);
- Some(CValue::by_val(val, fx.layout_of(fx.tcx.types.u128)))
- }
- (BinOp::Shr, true) => {
- let sign = fx.bcx.ins().icmp_imm(IntCC::SignedLessThan, lhs_msb, 0);
- let all_ones = fx.bcx.ins().iconst(types::I64, u64::MAX as i64);
- let all_sign_bits = fx.bcx.ins().select(sign, all_zeros, all_ones);
-
- let val = fx.bcx.ins().iconcat(lhs_msb, all_sign_bits);
- Some(CValue::by_val(val, fx.layout_of(fx.tcx.types.i128)))
- }
- (BinOp::Shl, _) => {
- let val_ty = if is_signed {
- fx.tcx.types.i128
- } else {
- fx.tcx.types.u128
- };
- let val = fx.bcx.ins().iconcat(all_zeros, lhs_lsb);
- Some(CValue::by_val(val, fx.layout_of(val_ty)))
- }
- _ => None,
- };
- if let Some(val) = val {
- if let Some(is_overflow) = is_overflow {
- let out_ty = fx.tcx.mk_tup([lhs.layout().ty, fx.tcx.types.bool].iter());
- let val = val.load_scalar(fx);
- return Some(CValue::by_val_pair(val, is_overflow, fx.layout_of(out_ty)));
- } else {
- return Some(val);
- }
- }
- }
-
- let truncated_rhs = clif_intcast(fx, rhs_val, types::I32, false);
- let truncated_rhs = CValue::by_val(truncated_rhs, fx.layout_of(fx.tcx.types.u32));
- let val = match (bin_op, is_signed) {
- (BinOp::Shl, false) => {
- fx.easy_call("__ashlti3", &[lhs, truncated_rhs], fx.tcx.types.u128)
- }
- (BinOp::Shl, true) => {
- fx.easy_call("__ashlti3", &[lhs, truncated_rhs], fx.tcx.types.i128)
- }
- (BinOp::Shr, false) => {
- fx.easy_call("__lshrti3", &[lhs, truncated_rhs], fx.tcx.types.u128)
- }
- (BinOp::Shr, true) => {
- fx.easy_call("__ashrti3", &[lhs, truncated_rhs], fx.tcx.types.i128)
- }
- (_, _) => unreachable!(),
- };
- if let Some(is_overflow) = is_overflow {
- let out_ty = fx.tcx.mk_tup([lhs.layout().ty, fx.tcx.types.bool].iter());
- let val = val.load_scalar(fx);
- Some(CValue::by_val_pair(val, is_overflow, fx.layout_of(out_ty)))
- } else {
- Some(val)
- }
- }
+ BinOp::Shl | BinOp::Shr => None,
}
}
projects / rust.git / blobdiff