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