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use std::ops::Range;
use crate::json_parser::ArgPrep;
use crate::types::{IntrinsicType, TypeKind};
use crate::Language;
/// An argument for the intrinsic.
#[derive(Debug, PartialEq, Clone)]
pub struct Argument {
/// The argument's index in the intrinsic function call.
pub pos: usize,
/// The argument name.
pub name: String,
/// The type of the argument.
pub ty: IntrinsicType,
/// Any constraints that are on this argument
pub constraints: Vec<Constraint>,
}
#[derive(Debug, PartialEq, Clone)]
pub enum Constraint {
Equal(i64),
Range(Range<i64>),
}
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(())
}
}
}
impl Constraint {
pub fn to_range(&self) -> Range<i64> {
match self {
Constraint::Equal(eq) => *eq..*eq + 1,
Constraint::Range(range) => range.clone(),
}
}
}
impl Argument {
fn to_c_type(&self) -> String {
self.ty.c_type()
}
fn is_simd(&self) -> bool {
self.ty.is_simd()
}
pub fn is_ptr(&self) -> bool {
self.ty.is_ptr()
}
pub fn has_constraint(&self) -> bool {
!self.constraints.is_empty()
}
pub fn type_and_name_from_c(arg: &str) -> (&str, &str) {
let split_index = arg
.rfind([' ', '*'])
.expect("Couldn't split type and argname");
(arg[..split_index + 1].trim_end(), &arg[split_index + 1..])
}
pub fn from_c(pos: usize, arg: &str, arg_prep: Option<ArgPrep>) -> Argument {
let (ty, var_name) = Self::type_and_name_from_c(arg);
let ty = IntrinsicType::from_c(ty)
.unwrap_or_else(|_| panic!("Failed to parse argument '{arg}'"));
let constraint = arg_prep.and_then(|a| a.try_into().ok());
Argument {
pos,
name: String::from(var_name),
ty,
constraints: constraint.map_or(vec![], |r| vec![r]),
}
}
}
#[derive(Debug, PartialEq, Clone)]
pub struct ArgumentList {
pub args: Vec<Argument>,
}
impl ArgumentList {
/// Converts the argument list into the call parameters for a C function call.
/// e.g. this would generate something like `a, &b, c`
pub fn as_call_param_c(&self) -> String {
self.args
.iter()
.map(|arg| match arg.ty {
IntrinsicType::Ptr { .. } => {
format!("&{}", arg.name)
}
IntrinsicType::Type { .. } => arg.name.clone(),
})
.collect::<Vec<String>>()
.join(", ")
}
/// Converts the argument list into the call parameters for a Rust function.
/// e.g. this would generate something like `a, b, c`
pub fn as_call_param_rust(&self) -> String {
self.args
.iter()
.filter(|a| !a.has_constraint())
.map(|arg| arg.name.clone())
.collect::<Vec<String>>()
.join(", ")
}
pub fn as_constraint_parameters_rust(&self) -> String {
self.args
.iter()
.filter(|a| a.has_constraint())
.map(|arg| arg.name.clone())
.collect::<Vec<String>>()
.join(", ")
}
/// Creates a line for each argument that initializes an array for C from which `loads` argument
/// values can be loaded as a sliding window.
/// e.g `const int32x2_t a_vals = {0x3effffff, 0x3effffff, 0x3f7fffff}`, if loads=2.
pub fn gen_arglists_c(&self, loads: u32) -> String {
self.iter()
.filter_map(|arg| {
(!arg.has_constraint()).then(|| {
format!(
"const {ty} {name}_vals[] = {{ {values} }};",
ty = arg.ty.c_scalar_type(),
name = arg.name,
values = arg.ty.populate_random(loads, &Language::C)
)
})
})
.collect::<Vec<_>>()
.join("\n")
}
/// Creates a line for each argument that initializes an array for Rust from which `loads` argument
/// values can be loaded as a sliding window, e.g `const A_VALS: [u32; 20] = [...];`
pub fn gen_arglists_rust(&self, loads: u32) -> String {
self.iter()
.filter_map(|arg| {
(!arg.has_constraint()).then(|| {
format!(
"const {upper_name}_VALS: [{ty}; {load_size}] = unsafe{{ [{values}] }};",
upper_name = arg.name.to_uppercase(),
ty = arg.ty.rust_scalar_type(),
load_size = arg.ty.num_lanes() * arg.ty.num_vectors() + loads - 1,
values = arg.ty.populate_random(loads, &Language::Rust)
)
})
})
.collect::<Vec<_>>()
.join("\n")
}
/// Creates a line for each argument that initalizes the argument from an array [arg]_vals at
/// an offset i using a load intrinsic, in C.
/// e.g `uint8x8_t a = vld1_u8(&a_vals[i]);`
pub fn load_values_c(&self, p64_armv7_workaround: bool) -> String {
self.iter()
.filter_map(|arg| {
// The ACLE doesn't support 64-bit polynomial loads on Armv7
// This and the cast are a workaround for this
let armv7_p64 = if let TypeKind::Poly = arg.ty.kind() {
p64_armv7_workaround
} else {
false
};
(!arg.has_constraint()).then(|| {
format!(
"{ty} {name} = {open_cast}{load}(&{name}_vals[i]){close_cast};",
ty = arg.to_c_type(),
name = arg.name,
load = if arg.is_simd() {
arg.ty.get_load_function(p64_armv7_workaround)
} else {
"*".to_string()
},
open_cast = if armv7_p64 {
format!("cast<{}>(", arg.to_c_type())
} else {
"".to_string()
},
close_cast = if armv7_p64 {
")".to_string()
} else {
"".to_string()
}
)
})
})
.collect::<Vec<_>>()
.join("\n ")
}
/// Creates a line for each argument that initalizes the argument from array [ARG]_VALS at
/// an offset i using a load intrinsic, in Rust.
/// e.g `let a = vld1_u8(A_VALS.as_ptr().offset(i));`
pub fn load_values_rust(&self) -> String {
self.iter()
.filter_map(|arg| {
(!arg.has_constraint()).then(|| {
format!(
"let {name} = {load}({upper_name}_VALS.as_ptr().offset(i));",
name = arg.name,
upper_name = arg.name.to_uppercase(),
load = if arg.is_simd() {
arg.ty.get_load_function(false)
} else {
"*".to_string()
},
)
})
})
.collect::<Vec<_>>()
.join("\n ")
}
pub fn iter(&self) -> std::slice::Iter<'_, Argument> {
self.args.iter()
}
}
|
