Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

[spec] Update algorithm #290

Merged
merged 2 commits into from
Jan 25, 2024
Merged

[spec] Update algorithm #290

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
daeee78
[spec] Update algorithm
rossberg Jan 24, 2024
93cf84b
Comments
rossberg Jan 25, 2024
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
34 changes: 19 additions & 15 deletions document/core/appendix/algorithm.rst
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -25,7 +25,7 @@ Types are representable as an enumeration.

.. code-block:: pseudo

type val_type = I32 | I64 | F32 | F64 | V128 | Funcref | Externref
type val_type = I32 | I64 | F32 | F64 | V128 | Funcref | Exnref | Externref
rossberg marked this conversation as resolved.
Show resolved Hide resolved

func is_num(t : val_type | Unknown) : bool =
return t = I32 || t = I64 || t = F32 || t = F64 || t = Unknown
Expand All @@ -34,7 +34,7 @@ Types are representable as an enumeration.
return t = V128 || t = Unknown

func is_ref(t : val_type | Unknown) : bool =
return t = Funcref || t = Externref || t = Unknown
return t = Funcref || t = Exnref || t = Externref || t = Unknown

The algorithm uses two separate stacks: the *value stack* and the *control stack*.
The former tracks the :ref:`types <syntax-valtype>` of operand values on the :ref:`stack <stack>`,
Expand Down Expand Up @@ -212,22 +212,26 @@ Other instructions are checked in a similar manner.
error_if(frame.opcode =/= if)
push_ctrl(else, frame.start_types, frame.end_types)

case (try t1*->t2*)
case (try_table t1*->t2* handler*)
pop_vals([t1*])
push_ctrl(try, [t1*], [t2*])

case (catch x)
let frame = pop_ctrl()
error_if(frame.opcode =/= try || frame.opcode =/= catch)
push_ctrl(catch, tags[x].type.params, frame.end_types)

case (catch_all)
let frame = pop_ctrl()
error_if(frame.opcode =/= try || frame.opcode =/= catch)
push_ctrl(catch_all, [], frame.end_types)
foreach (handler in handler*)
error_if(ctrls.size() < handler.label)
push_ctrl(catch, [], label_types(ctrls[handler.label]))
switch (handler.clause)
case (catch x)
push_vals(tags[x].type.params)
case (catch_ref x)
push_vals(tags[x].type.params)
push_val(Exnref)
case (catch_all)
skip
case (catch_all_ref)
push_val(Exnref)
pop_ctrl()
push_ctrl(try_table, [t1*], [t2*])

case (throw x)
pop.vals(tags[x].type.params)
pop_vals(tags[x].type.params)
unreachable()

case (br n)
Expand Down
6 changes: 2 additions & 4 deletions document/core/syntax/instructions.rst
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -621,11 +621,9 @@ The |DATADROP| instruction prevents further use of a passive data segment. This
.. _syntax-block:
.. _syntax-loop:
.. _syntax-if:
.. _syntax-try:
.. _syntax-try-catch:
.. _syntax-try-delegate:
.. _syntax-try_table:
.. _syntax-throw:
.. _syntax-rethrow:
.. _syntax-throw_ref:
.. _syntax-br:
.. _syntax-br_if:
.. _syntax-br_table:
Expand Down
Loading