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nac3core: abs builtin function

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This commit is contained in:
ychenfo 2022-03-08 23:02:25 +08:00
parent 1cc276cb43
commit 5006028e2d
1 changed files with 71 additions and 1 deletions
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72
nac3core/src/toplevel/builtins.rs
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@ -987,7 +987,7 @@ pub fn get_builtins(primitives: &mut (PrimitiveStore, Unifier)) -> BuiltinInfo {
FuncArg { name: "n".into(), ty: num_ty.0, default_value: None },
],
ret: num_ty.0,
vars: var_map,
vars: var_map.clone(),
})),
var_id: Default::default(),
instance_to_symbol: Default::default(),
@ -1040,6 +1040,75 @@ pub fn get_builtins(primitives: &mut (PrimitiveStore, Unifier)) -> BuiltinInfo {
)))),
loc: None,
})),
Arc::new(RwLock::new(TopLevelDef::Function {
name: "abs".into(),
simple_name: "abs".into(),
signature: primitives.1.add_ty(TypeEnum::TFunc(FunSignature {
args: vec![FuncArg { name: "n".into(), ty: num_ty.0, default_value: None }],
ret: num_ty.0,
vars: var_map,
})),
var_id: Default::default(),
instance_to_symbol: Default::default(),
instance_to_stmt: Default::default(),
resolver: None,
codegen_callback: Some(Arc::new(GenCall::new(Box::new(
|ctx, _, fun, args, generator| {
let boolean = ctx.primitives.bool;
let int32 = ctx.primitives.int32;
let int64 = ctx.primitives.int64;
let uint32 = ctx.primitives.uint32;
let uint64 = ctx.primitives.uint64;
let float = ctx.primitives.float;
let llvm_i1 = ctx.ctx.bool_type();
let llvm_i32 = ctx.ctx.i32_type().as_basic_type_enum();
let llvm_i64 = ctx.ctx.i64_type().as_basic_type_enum();
let llvm_f64 = ctx.ctx.f64_type().as_basic_type_enum();
let n_ty = fun.0.args[0].ty;
let n_val = args[0].1.clone().to_basic_value_enum(ctx, generator)?;
let mut is_type = |a: Type, b: Type| ctx.unifier.unioned(a, b);
let mut is_float = false;
let (fun_name, arg_ty) =
if is_type(n_ty, boolean) || is_type(n_ty, uint32) || is_type(n_ty, uint64)
{
return Ok(n_val.into());
} else if is_type(n_ty, int32) {
("llvm.abs.i32", llvm_i32)
} else if is_type(n_ty, int64) {
("llvm.abs.i64", llvm_i64)
} else if is_type(n_ty, float) {
is_float = true;
("llvm.fabs.f64", llvm_f64)
} else {
unreachable!();
};
let intrinsic = ctx.module.get_function(fun_name).unwrap_or_else(|| {
let fn_type = if is_float {
arg_ty.fn_type(&[arg_ty.into()], false)
} else {
arg_ty.fn_type(&[arg_ty.into(), llvm_i1.into()], false)
};
ctx.module.add_function(fun_name, fn_type, None)
});
let val = ctx
.builder
.build_call(
intrinsic,
&if is_float {
vec![n_val.into()]
} else {
vec![n_val.into(), llvm_i1.const_int(0, false).into()]
},
"abs",
)
.try_as_basic_value()
.left()
.unwrap();
Ok(val.into())
},
)))),
loc: None,
})),
];
let ast_list: Vec<Option<ast::Stmt<()>>> =
(0..top_level_def_list.len()).map(|_| None).collect();
@ -1065,6 +1134,7 @@ pub fn get_builtins(primitives: &mut (PrimitiveStore, Unifier)) -> BuiltinInfo {
"len",
"min",
"max",
"abs",
],
)
}