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[msl-out] emit packed vectors if necessary

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Dzmitry Malyshau
2021-04-09 00:15:47 -04:00
committed by Dzmitry Malyshau
parent f3ba6e91c2
commit 425c75eb3f
1 changed files with 42 additions and 18 deletions
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60
src/back/msl/writer.rs
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@@ -1390,26 +1390,50 @@ impl<W: Write> Writer<W> {
//TODO: adjust the struct initializers
writeln!(self.out, "{}char _pad{}[{}];", INDENT, index, pad)?;
}
let member_name = &self.names[&NameKey::StructMember(handle, index as u32)];
let base_name = TypeContext {
handle: member.ty,
arena: &module.types,
names: &self.names,
usage: global_use,
access: crate::StorageAccess::empty(),
first_time: false,
};
writeln!(self.out, "{}{} {};", INDENT, base_name, member_name)?;
let ty_inner = &module.types[member.ty].inner;
last_offset = member.offset + ty_inner.span(&module.constants);
// for 3-component vectors, add one component
if let crate::TypeInner::Vector {
size: crate::VectorSize::Tri,
kind: _,
width,
} = *ty_inner
{
last_offset += width as u32;
let is_tight = match members.get(index + 1) {
Some(next) => next.offset == last_offset,
None => false,
};
let member_name = &self.names[&NameKey::StructMember(handle, index as u32)];
match *ty_inner {
// for a misaligned vec3, issue a packed vector
crate::TypeInner::Vector {
size: crate::VectorSize::Tri,
kind,
width: 4,
} if member.offset & 0xF != 0 || is_tight => {
writeln!(
self.out,
"{}packed_{}3 {};",
INDENT,
scalar_kind_string(kind),
member_name
)?;
}
_ => {
let base_name = TypeContext {
handle: member.ty,
arena: &module.types,
names: &self.names,
usage: global_use,
access: crate::StorageAccess::empty(),
first_time: false,
};
writeln!(self.out, "{}{} {};", INDENT, base_name, member_name)?;
// for 3-component vectors, add one component
if let crate::TypeInner::Vector {
size: crate::VectorSize::Tri,
kind: _,
width,
} = *ty_inner
{
last_offset += width as u32;
}
}
}
}
writeln!(self.out, "}};")?;