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use super::*;
use ptx_parser as ast;
pub(crate) fn run<'input>(
resolver: &mut GlobalStringIdentResolver2<'input>,
directives: Vec<NormalizedDirective2<'input>>,
) -> Result<Vec<UnconditionalDirective<'input>>, TranslateError> {
directives
.into_iter()
.map(|directive| run_directive(resolver, directive))
.collect::<Result<Vec<_>, _>>()
}
fn run_directive<'input>(
resolver: &mut GlobalStringIdentResolver2<'input>,
directive: NormalizedDirective2<'input>,
) -> Result<UnconditionalDirective<'input>, TranslateError> {
Ok(match directive {
Directive2::Variable(linking, var) => Directive2::Variable(linking, var),
Directive2::Method(method) => Directive2::Method(run_method(resolver, method)?),
})
}
fn run_method<'input>(
resolver: &mut GlobalStringIdentResolver2<'input>,
method: NormalizedFunction2<'input>,
) -> Result<UnconditionalFunction<'input>, TranslateError> {
let body = method
.body
.map(|statements| {
let mut result = Vec::with_capacity(statements.len());
for statement in statements {
run_statement(resolver, &mut result, statement)?;
}
Ok::<_, TranslateError>(result)
})
.transpose()?;
Ok(Function2 {
func_decl: method.func_decl,
globals: method.globals,
body,
import_as: method.import_as,
tuning: method.tuning,
linkage: method.linkage,
})
}
fn run_statement<'input>(
resolver: &mut GlobalStringIdentResolver2<'input>,
result: &mut Vec<UnconditionalStatement>,
statement: NormalizedStatement,
) -> Result<(), TranslateError> {
Ok(match statement {
Statement::Label(label) => result.push(Statement::Label(label)),
Statement::Variable(var) => result.push(Statement::Variable(var)),
Statement::Instruction((predicate, instruction)) => {
if let Some(pred) = predicate {
let if_true = resolver.register_unnamed(None);
let if_false = resolver.register_unnamed(None);
let folded_bra = match &instruction {
ast::Instruction::Bra { arguments, .. } => Some(arguments.src),
_ => None,
};
let mut branch = BrachCondition {
predicate: pred.label,
if_true: folded_bra.unwrap_or(if_true),
if_false,
};
if pred.not {
std::mem::swap(&mut branch.if_true, &mut branch.if_false);
}
result.push(Statement::Conditional(branch));
if folded_bra.is_none() {
result.push(Statement::Label(if_true));
result.push(Statement::Instruction(instruction));
}
result.push(Statement::Label(if_false));
} else {
result.push(Statement::Instruction(instruction));
}
}
_ => return Err(error_unreachable()),
})
}
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