|
| 1 | +use la_arena::Idx; |
| 2 | +use smallvec::SmallVec; |
| 3 | +use syntax::{ |
| 4 | + SyntaxKind, SyntaxToken, TokenKind, |
| 5 | + ast::{self, AstNode}, |
| 6 | + ptr::{SyntaxNodePtr, SyntaxTokenPtr}, |
| 7 | + slang_ext::AstNodeExt, |
| 8 | +}; |
| 9 | +use utils::text_edit::TextRange; |
| 10 | + |
| 11 | +use super::{LowerModuleCtx, port::PortDirection}; |
| 12 | +use crate::{ |
| 13 | + hir_def::{Ident, alloc_idx_and_src, lower_ident_opt}, |
| 14 | + source_map::{FromSourceAst, IsNamedSrc, IsSrc, SourceAst, root_token_in}, |
| 15 | +}; |
| 16 | + |
| 17 | +#[derive(Debug, PartialEq, Eq, Clone)] |
| 18 | +pub struct ModportDef { |
| 19 | + pub name: Option<Ident>, |
| 20 | + pub ports: SmallVec<[ModportPort; 4]>, |
| 21 | +} |
| 22 | + |
| 23 | +pub type ModportId = Idx<ModportDef>; |
| 24 | + |
| 25 | +#[derive(Debug, PartialEq, Eq, Clone)] |
| 26 | +pub struct ModportPort { |
| 27 | + pub name: Ident, |
| 28 | + pub dir: PortDirection, |
| 29 | +} |
| 30 | + |
| 31 | +#[derive(Debug, PartialEq, Eq, Clone, Copy, Hash)] |
| 32 | +pub struct ModportSrc { |
| 33 | + pub node: SyntaxNodePtr, |
| 34 | + pub name: Option<SyntaxTokenPtr>, |
| 35 | +} |
| 36 | + |
| 37 | +impl IsSrc for ModportSrc { |
| 38 | + #[inline] |
| 39 | + fn kind(&self) -> SyntaxKind { |
| 40 | + self.node.kind() |
| 41 | + } |
| 42 | + |
| 43 | + #[inline] |
| 44 | + fn range(&self) -> TextRange { |
| 45 | + self.node.range() |
| 46 | + } |
| 47 | +} |
| 48 | + |
| 49 | +impl IsNamedSrc for ModportSrc { |
| 50 | + #[inline] |
| 51 | + fn name_kind(&self) -> Option<TokenKind> { |
| 52 | + self.name.map(|name| name.kind()) |
| 53 | + } |
| 54 | + |
| 55 | + #[inline] |
| 56 | + fn name_range(&self) -> Option<TextRange> { |
| 57 | + self.name.map(|name| name.range()) |
| 58 | + } |
| 59 | +} |
| 60 | + |
| 61 | +impl<'a> FromSourceAst<'a, ast::ModportItem<'a>> for ModportSrc { |
| 62 | + fn from_source_ast(item: SourceAst<ast::ModportItem<'a>>) -> Self { |
| 63 | + let item = item.into_inner(); |
| 64 | + let syntax = item.syntax(); |
| 65 | + let name = item |
| 66 | + .name() |
| 67 | + .and_then(|name| root_token_in(syntax, name).map(SyntaxTokenPtr::from_token)); |
| 68 | + Self { node: AstNodeExt::to_ptr(&item), name } |
| 69 | + } |
| 70 | +} |
| 71 | + |
| 72 | +pub(crate) trait LowerModport { |
| 73 | + fn lower_modport_declaration( |
| 74 | + &mut self, |
| 75 | + modport: ast::ModportDeclaration<'_>, |
| 76 | + ) -> SmallVec<[ModportId; 1]>; |
| 77 | +} |
| 78 | + |
| 79 | +impl LowerModport for LowerModuleCtx<'_> { |
| 80 | + fn lower_modport_declaration( |
| 81 | + &mut self, |
| 82 | + modport: ast::ModportDeclaration<'_>, |
| 83 | + ) -> SmallVec<[ModportId; 1]> { |
| 84 | + let mut lowered = SmallVec::new(); |
| 85 | + for item in modport.items().children() { |
| 86 | + let name = lower_ident_opt(item.name()); |
| 87 | + let ports = lower_modport_ports(item); |
| 88 | + let modport_id = alloc_idx_and_src! { |
| 89 | + self.file_id; |
| 90 | + ModportDef { name, ports } => self.module.modports, |
| 91 | + item => self.module_source_map.modport_srcs, |
| 92 | + }; |
| 93 | + lowered.push(modport_id); |
| 94 | + } |
| 95 | + lowered |
| 96 | + } |
| 97 | +} |
| 98 | + |
| 99 | +fn lower_modport_ports(item: ast::ModportItem<'_>) -> SmallVec<[ModportPort; 4]> { |
| 100 | + let mut ports = SmallVec::new(); |
| 101 | + |
| 102 | + // slang models a modport item as named entries whose `ports()` members are |
| 103 | + // simple or subroutine port lists; each list then owns its inner ports. |
| 104 | + for member in item.ports().ports().children() { |
| 105 | + match member { |
| 106 | + ast::Member::ModportSimplePortList(port_list) => { |
| 107 | + let dir = lower_modport_dir(port_list.direction()).unwrap_or_default(); |
| 108 | + for port in port_list.ports().children() { |
| 109 | + if let Some(name) = lower_modport_port_name(port) { |
| 110 | + ports.push(ModportPort { name, dir }); |
| 111 | + } |
| 112 | + } |
| 113 | + } |
| 114 | + ast::Member::ModportSubroutinePortList(port_list) => { |
| 115 | + let dir = lower_modport_subroutine_dir(port_list.import_export()); |
| 116 | + for port in port_list.ports().children() { |
| 117 | + if let Some(name) = lower_modport_port_name(port) { |
| 118 | + ports.push(ModportPort { name, dir }); |
| 119 | + } |
| 120 | + } |
| 121 | + } |
| 122 | + _ => {} |
| 123 | + } |
| 124 | + } |
| 125 | + |
| 126 | + ports |
| 127 | +} |
| 128 | + |
| 129 | +fn lower_modport_port_name(port: ast::ModportPort<'_>) -> Option<Ident> { |
| 130 | + match port { |
| 131 | + ast::ModportPort::ModportNamedPort(port) => lower_ident_opt(port.name()), |
| 132 | + ast::ModportPort::ModportExplicitPort(port) => lower_ident_opt(port.name()), |
| 133 | + ast::ModportPort::ModportSubroutinePort(port) => { |
| 134 | + lower_ident_opt(rightmost_name_token(port.prototype().name())) |
| 135 | + } |
| 136 | + } |
| 137 | +} |
| 138 | + |
| 139 | +fn rightmost_name_token(name: ast::Name<'_>) -> Option<SyntaxToken<'_>> { |
| 140 | + match name { |
| 141 | + ast::Name::IdentifierName(name) => name.identifier(), |
| 142 | + ast::Name::IdentifierSelectName(name) => name.identifier(), |
| 143 | + ast::Name::ScopedName(name) => rightmost_name_token(name.right()), |
| 144 | + _ => None, |
| 145 | + } |
| 146 | +} |
| 147 | + |
| 148 | +fn lower_modport_dir(tok: Option<SyntaxToken<'_>>) -> Option<PortDirection> { |
| 149 | + tok.and_then(|tok| match tok.kind() { |
| 150 | + TokenKind::INPUT_KEYWORD => Some(PortDirection::Input), |
| 151 | + TokenKind::OUTPUT_KEYWORD => Some(PortDirection::Output), |
| 152 | + TokenKind::IN_OUT_KEYWORD => Some(PortDirection::Inout), |
| 153 | + TokenKind::REF_KEYWORD => Some(PortDirection::Ref), |
| 154 | + _ => None, |
| 155 | + }) |
| 156 | +} |
| 157 | + |
| 158 | +fn lower_modport_subroutine_dir(tok: Option<SyntaxToken<'_>>) -> PortDirection { |
| 159 | + match tok.map(|tok| tok.kind()) { |
| 160 | + Some(TokenKind::EXPORT_KEYWORD) => PortDirection::Output, |
| 161 | + _ => PortDirection::Input, |
| 162 | + } |
| 163 | +} |
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