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Remove unneeded libcalls from codegen_i128.rs

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This commit is contained in:
beetrees 2024-07-20 17:03:35 +01:00
parent b929b68a5b
commit b70ad2defd
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GPG Key ID: 8791BD754191EBD6
2 changed files with 4 additions and 29 deletions
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27
src/codegen_i128.rs
View File

@ -23,19 +23,7 @@ pub(crate) fn maybe_codegen<'tcx>(
match bin_op {
BinOp::BitAnd | BinOp::BitOr | BinOp::BitXor => None,
BinOp::Add | BinOp::AddUnchecked | BinOp::Sub | BinOp::SubUnchecked => None,
BinOp::Mul | BinOp::MulUnchecked => {
let args = [lhs.load_scalar(fx), rhs.load_scalar(fx)];
let ret_val = fx.lib_call(
"__multi3",
vec![AbiParam::new(types::I128), AbiParam::new(types::I128)],
vec![AbiParam::new(types::I128)],
&args,
)[0];
Some(CValue::by_val(
ret_val,
fx.layout_of(if is_signed { fx.tcx.types.i128 } else { fx.tcx.types.u128 }),
))
}
BinOp::Mul | BinOp::MulUnchecked => None,
BinOp::Offset => unreachable!("offset should only be used on pointers, not 128bit ints"),
BinOp::Div | BinOp::Rem => {
let name = match (bin_op, is_signed) {
@ -92,6 +80,7 @@ pub(crate) fn maybe_codegen_checked<'tcx>(
match bin_op {
BinOp::BitAnd | BinOp::BitOr | BinOp::BitXor => unreachable!(),
BinOp::Add | BinOp::Sub => None,
BinOp::Mul if is_signed => {
let out_ty = Ty::new_tup(fx.tcx, &[lhs.layout().ty, fx.tcx.types.bool]);
let oflow = CPlace::new_stack_slot(fx, fx.layout_of(fx.tcx.types.i32));
@ -112,7 +101,7 @@ pub(crate) fn maybe_codegen_checked<'tcx>(
let oflow = fx.bcx.ins().ireduce(types::I8, oflow);
Some(CValue::by_val_pair(res, oflow, fx.layout_of(out_ty)))
}
BinOp::Add | BinOp::Sub | BinOp::Mul => {
BinOp::Mul => {
let out_ty = Ty::new_tup(fx.tcx, &[lhs.layout().ty, fx.tcx.types.bool]);
let out_place = CPlace::new_stack_slot(fx, fx.layout_of(out_ty));
let param_types = vec![
@ -121,15 +110,7 @@ pub(crate) fn maybe_codegen_checked<'tcx>(
AbiParam::new(types::I128),
];
let args = [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);
fx.lib_call("__rust_u128_mulo", param_types, vec![], &args);
Some(out_place.to_cvalue(fx))
}
BinOp::AddUnchecked | BinOp::SubUnchecked | BinOp::MulUnchecked => unreachable!(),

6
src/compiler_builtins.rs
View File

@ -38,18 +38,12 @@ pub(crate) fn $register(builder: &mut cranelift_jit::JITBuilder) {
register_functions_for_jit;
// integers
fn __multi3(a: i128, b: i128) -> i128;
fn __muloti4(n: i128, d: i128, oflow: &mut i32) -> i128;
fn __udivti3(n: u128, d: u128) -> u128;
fn __divti3(n: i128, d: i128) -> i128;
fn __umodti3(n: u128, d: u128) -> u128;
fn __modti3(n: i128, d: i128) -> i128;
fn __rust_u128_addo(a: u128, b: u128) -> (u128, bool);
fn __rust_i128_addo(a: i128, b: i128) -> (i128, bool);
fn __rust_u128_subo(a: u128, b: u128) -> (u128, bool);
fn __rust_i128_subo(a: i128, b: i128) -> (i128, bool);
fn __rust_u128_mulo(a: u128, b: u128) -> (u128, bool);
fn __rust_i128_mulo(a: i128, b: i128) -> (i128, bool);
// floats
fn __floattisf(i: i128) -> f32;