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https://github.com/gfx-rs/wgpu.git
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[naga hlsl-out] Factor out some repetitive code
This commit is contained in:
Andy Leiserson
parent
bfa7ee8de5
commit
1b4eca97cf
@ -45,6 +45,11 @@ pub(crate) const F2U64_FUNCTION: &str = "naga_f2u64";
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pub(crate) const IMAGE_SAMPLE_BASE_CLAMP_TO_EDGE_FUNCTION: &str =
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"nagaTextureSampleBaseClampToEdge";
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enum Index {
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Expression(Handle<crate::Expression>),
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Static(u32),
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}
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struct EpStructMember {
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name: String,
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ty: Handle<crate::Type>,
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@ -1797,6 +1802,23 @@ impl<'a, W: fmt::Write> super::Writer<'a, W> {
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Ok(())
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}
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fn write_index(
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&mut self,
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module: &Module,
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index: Index,
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func_ctx: &back::FunctionCtx<'_>,
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) -> BackendResult {
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match index {
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Index::Static(index) => {
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write!(self.out, "{index}")?;
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}
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Index::Expression(index) => {
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self.write_expr(module, index, func_ctx)?;
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}
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}
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Ok(())
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}
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/// Helper method used to write statements
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///
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/// # Notes
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@ -1953,13 +1975,15 @@ impl<'a, W: fmt::Write> super::Writer<'a, W> {
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//
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// We handle matrix Stores here directly (including sub accesses for Vectors and Scalars).
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// Loads are handled by `Expression::AccessIndex` (since sub accesses work fine for Loads).
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struct MatrixAccess {
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enum MatrixAccess {
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Direct {
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base: Handle<crate::Expression>,
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index: u32,
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}
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enum Index {
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Expression(Handle<crate::Expression>),
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Static(u32),
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},
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Struct {
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columns: crate::VectorSize,
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base: Handle<crate::Expression>,
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},
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}
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let get_members = |expr: Handle<crate::Expression>| {
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@ -1973,15 +1997,14 @@ impl<'a, W: fmt::Write> super::Writer<'a, W> {
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}
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};
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let mut matrix = None;
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let mut vector = None;
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let mut scalar = None;
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write!(self.out, "{level}")?;
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let mut current_expr = pointer;
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for _ in 0..3 {
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let resolved = func_ctx.resolve_type(current_expr, &module.types);
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match (resolved, &func_ctx.expressions[current_expr]) {
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let matrix_access_on_lhs =
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find_matrix_in_access_chain(module, pointer, func_ctx).and_then(
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|(matrix_expr, vector, scalar)| match (
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func_ctx.resolve_type(matrix_expr, &module.types),
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&func_ctx.expressions[matrix_expr],
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) {
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(
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&TypeInner::Pointer { base: ty, .. },
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&crate::Expression::AccessIndex { base, index },
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@ -1995,50 +2018,36 @@ impl<'a, W: fmt::Write> super::Writer<'a, W> {
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.map(|members| members[index as usize].binding.is_none())
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== Some(true) =>
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{
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matrix = Some(MatrixAccess { base, index });
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break;
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Some((MatrixAccess::Direct { base, index }, vector, scalar))
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}
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(
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&TypeInner::ValuePointer {
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size: Some(crate::VectorSize::Bi),
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..
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_ => {
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if let Some(MatrixType {
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columns,
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rows: crate::VectorSize::Bi,
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width: 4,
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}) = get_inner_matrix_of_struct_array_member(
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module,
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matrix_expr,
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func_ctx,
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true,
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) {
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Some((
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MatrixAccess::Struct {
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columns,
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base: matrix_expr,
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},
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&crate::Expression::Access { base, index },
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) => {
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vector = Some(Index::Expression(index));
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current_expr = base;
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vector,
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scalar,
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))
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} else {
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None
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}
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}
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(
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&TypeInner::ValuePointer {
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size: Some(crate::VectorSize::Bi),
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..
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},
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&crate::Expression::AccessIndex { base, index },
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) => {
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vector = Some(Index::Static(index));
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current_expr = base;
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}
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(
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&TypeInner::ValuePointer { size: None, .. },
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&crate::Expression::Access { base, index },
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) => {
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scalar = Some(Index::Expression(index));
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current_expr = base;
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}
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(
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&TypeInner::ValuePointer { size: None, .. },
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&crate::Expression::AccessIndex { base, index },
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) => {
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scalar = Some(Index::Static(index));
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current_expr = base;
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}
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_ => break,
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}
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}
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);
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write!(self.out, "{level}")?;
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if let Some(MatrixAccess { index, base }) = matrix {
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match matrix_access_on_lhs {
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Some((MatrixAccess::Direct { index, base }, vector, scalar)) => {
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let base_ty_res = &func_ctx.info[base].ty;
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let resolved = base_ty_res.inner_with(&module.types);
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let ty = match *resolved {
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@ -2057,14 +2066,7 @@ impl<'a, W: fmt::Write> super::Writer<'a, W> {
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if let Some(scalar_index) = scalar {
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write!(self.out, "[")?;
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match scalar_index {
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Index::Static(index) => {
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write!(self.out, "{index}")?;
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}
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Index::Expression(index) => {
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self.write_expr(module, index, func_ctx)?;
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}
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}
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self.write_index(module, scalar_index, func_ctx)?;
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write!(self.out, "]")?;
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}
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@ -2080,7 +2082,9 @@ impl<'a, W: fmt::Write> super::Writer<'a, W> {
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)?;
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}
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(&Some(_), &None) => {
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self.write_wrapped_struct_matrix_set_vec_function_name(access)?;
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self.write_wrapped_struct_matrix_set_vec_function_name(
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access,
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)?;
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}
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(&None, _) => {
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self.write_wrapped_struct_matrix_set_function_name(access)?;
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@ -2098,88 +2102,20 @@ impl<'a, W: fmt::Write> super::Writer<'a, W> {
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if let Some(scalar_index) = scalar {
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write!(self.out, ", ")?;
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match scalar_index {
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Index::Static(index) => {
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write!(self.out, "{index}")?;
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}
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Index::Expression(index) => {
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self.write_expr(module, index, func_ctx)?;
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}
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}
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self.write_index(module, scalar_index, func_ctx)?;
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}
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}
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writeln!(self.out, ");")?;
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}
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} else {
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}
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Some((
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MatrixAccess::Struct { columns, base },
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Some(Index::Expression(vec_index)),
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scalar,
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)) => {
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// We handle `Store`s to __matCx2 column vectors and scalar elements via
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// the previously injected functions __set_col_of_matCx2 / __set_el_of_matCx2.
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struct MatrixData {
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columns: crate::VectorSize,
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base: Handle<crate::Expression>,
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}
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enum Index {
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Expression(Handle<crate::Expression>),
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Static(u32),
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}
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let mut matrix = None;
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let mut vector = None;
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let mut scalar = None;
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let mut current_expr = pointer;
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for _ in 0..3 {
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let resolved = func_ctx.resolve_type(current_expr, &module.types);
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match (resolved, &func_ctx.expressions[current_expr]) {
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(
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&TypeInner::ValuePointer {
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size: Some(crate::VectorSize::Bi),
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..
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},
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&crate::Expression::Access { base, index },
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) => {
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vector = Some(index);
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current_expr = base;
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}
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(
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&TypeInner::ValuePointer { size: None, .. },
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&crate::Expression::Access { base, index },
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) => {
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scalar = Some(Index::Expression(index));
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current_expr = base;
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}
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(
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&TypeInner::ValuePointer { size: None, .. },
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&crate::Expression::AccessIndex { base, index },
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) => {
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scalar = Some(Index::Static(index));
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current_expr = base;
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}
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_ => {
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if let Some(MatrixType {
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columns,
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rows: crate::VectorSize::Bi,
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width: 4,
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}) = get_inner_matrix_of_struct_array_member(
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module,
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current_expr,
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func_ctx,
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true,
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) {
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matrix = Some(MatrixData {
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columns,
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base: current_expr,
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});
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}
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break;
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}
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}
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}
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if let (Some(MatrixData { columns, base }), Some(vec_index)) =
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(matrix, vector)
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{
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if scalar.is_some() {
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write!(self.out, "__set_el_of_mat{}x2", columns as u8)?;
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} else {
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@ -2192,21 +2128,17 @@ impl<'a, W: fmt::Write> super::Writer<'a, W> {
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if let Some(scalar_index) = scalar {
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write!(self.out, ", ")?;
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match scalar_index {
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Index::Static(index) => {
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write!(self.out, "{index}")?;
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}
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Index::Expression(index) => {
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self.write_expr(module, index, func_ctx)?;
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}
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}
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self.write_index(module, scalar_index, func_ctx)?;
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}
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write!(self.out, ", ")?;
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self.write_expr(module, value, func_ctx)?;
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writeln!(self.out, ");")?;
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} else {
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}
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Some((MatrixAccess::Struct { .. }, Some(Index::Static(_)), _))
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| Some((MatrixAccess::Struct { .. }, None, _))
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| None => {
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self.write_expr(module, pointer, func_ctx)?;
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write!(self.out, " = ")?;
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@ -4423,12 +4355,17 @@ pub(super) fn get_inner_matrix_data(
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}
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}
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/// If `base` is an access chain of the form `mat`, `mat[col]`, or `mat[col][row]`,
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/// returns a tuple of the matrix, the column (vector) index (if present), and
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/// the row (scalar) index (if present).
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fn find_matrix_in_access_chain(
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module: &Module,
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base: Handle<crate::Expression>,
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func_ctx: &back::FunctionCtx<'_>,
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) -> Option<Handle<crate::Expression>> {
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) -> Option<(Handle<crate::Expression>, Option<Index>, Option<Index>)> {
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let mut current_base = base;
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let mut vector = None;
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let mut scalar = None;
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loop {
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let resolved_tr = func_ctx
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.resolve_type(current_base, &module.types)
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@ -4436,15 +4373,22 @@ fn find_matrix_in_access_chain(
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let resolved = resolved_tr.as_ref()?.inner_with(&module.types);
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match *resolved {
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TypeInner::Matrix { .. } => return Some((current_base, vector, scalar)),
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TypeInner::Scalar(_) | TypeInner::Vector { .. } => {}
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TypeInner::Matrix { .. } => return Some(current_base),
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_ => return None,
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}
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current_base = match func_ctx.expressions[current_base] {
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crate::Expression::Access { base, .. } => base,
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crate::Expression::AccessIndex { base, .. } => base,
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let index;
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(current_base, index) = match func_ctx.expressions[current_base] {
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crate::Expression::Access { base, index } => (base, Index::Expression(index)),
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crate::Expression::AccessIndex { base, index } => (base, Index::Static(index)),
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_ => return None,
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};
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match *resolved {
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TypeInner::Scalar(_) => scalar = Some(index),
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TypeInner::Vector { .. } => vector = Some(index),
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_ => unreachable!(),
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}
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}
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}
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