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|
use super::intrinsic::ArmIntrinsicType;
use crate::common::argument::{Argument, ArgumentList};
use crate::common::constraint::Constraint;
use crate::common::intrinsic::Intrinsic;
use crate::common::intrinsic_helpers::{IntrinsicType, IntrinsicTypeDefinition};
use serde::Deserialize;
use serde_json::Value;
use std::collections::HashMap;
use std::path::Path;
#[derive(Deserialize, Debug)]
#[serde(deny_unknown_fields)]
struct ReturnType {
value: String,
}
#[derive(Deserialize, Debug)]
#[serde(untagged, deny_unknown_fields)]
pub enum ArgPrep {
Register {
#[serde(rename = "register")]
#[allow(dead_code)]
reg: String,
},
Immediate {
#[serde(rename = "minimum")]
min: i64,
#[serde(rename = "maximum")]
max: i64,
},
Nothing {},
}
impl TryFrom<Value> for ArgPrep {
type Error = serde_json::Error;
fn try_from(value: Value) -> Result<Self, Self::Error> {
serde_json::from_value(value)
}
}
#[derive(Deserialize, Debug)]
struct JsonIntrinsic {
#[serde(rename = "SIMD_ISA")]
simd_isa: String,
name: String,
arguments: Vec<String>,
return_type: ReturnType,
#[serde(rename = "Arguments_Preparation")]
args_prep: Option<HashMap<String, Value>>,
#[serde(rename = "Architectures")]
architectures: Vec<String>,
}
pub fn get_neon_intrinsics(
filename: &Path,
target: &str,
) -> Result<Vec<Intrinsic<ArmIntrinsicType>>, Box<dyn std::error::Error>> {
let file = std::fs::File::open(filename)?;
let reader = std::io::BufReader::new(file);
let json: Vec<JsonIntrinsic> = serde_json::from_reader(reader).expect("Couldn't parse JSON");
let parsed = json
.into_iter()
.filter_map(|intr| {
if intr.simd_isa == "Neon" {
Some(json_to_intrinsic(intr, target).expect("Couldn't parse JSON"))
} else {
None
}
})
.collect();
Ok(parsed)
}
fn json_to_intrinsic(
mut intr: JsonIntrinsic,
target: &str,
) -> Result<Intrinsic<ArmIntrinsicType>, Box<dyn std::error::Error>> {
let name = intr.name.replace(['[', ']'], "");
let results = ArmIntrinsicType::from_c(&intr.return_type.value, target)?;
let args = intr
.arguments
.into_iter()
.enumerate()
.map(|(i, arg)| {
let arg_name = Argument::<ArmIntrinsicType>::type_and_name_from_c(&arg).1;
let metadata = intr.args_prep.as_mut();
let metadata = metadata.and_then(|a| a.remove(arg_name));
let arg_prep: Option<ArgPrep> = metadata.and_then(|a| a.try_into().ok());
let constraint: Option<Constraint> = arg_prep.and_then(|a| a.try_into().ok());
let mut arg = Argument::<ArmIntrinsicType>::from_c(i, &arg, target, constraint);
// The JSON doesn't list immediates as const
let IntrinsicType {
ref mut constant, ..
} = arg.ty.0;
if arg.name.starts_with("imm") {
*constant = true
}
arg
})
.collect();
let arguments = ArgumentList::<ArmIntrinsicType> { args };
Ok(Intrinsic {
name,
arguments,
results: *results,
arch_tags: intr.architectures,
})
}
/// ARM-specific
impl TryFrom<ArgPrep> for Constraint {
type Error = ();
fn try_from(prep: ArgPrep) -> Result<Self, Self::Error> {
let parsed_ints = match prep {
ArgPrep::Immediate { min, max } => Ok((min, max)),
_ => Err(()),
};
if let Ok((min, max)) = parsed_ints {
if min == max {
Ok(Constraint::Equal(min))
} else {
Ok(Constraint::Range(min..max + 1))
}
} else {
Err(())
}
}
}
|
