jbwdevries/phasm
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jbwdevries merged 73 commits from idea_crc32 into master 2022-08-21 12:59:21 +00:00
Conversation 0 Commits 73 Files Changed 57 +54 -51
4 changed files with 54 additions and 51 deletions
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Showing only changes of commit 27fa1cc76d - Show all commits

45
examples/buffer.html
View File

@ -1,3 +1,4 @@
<!DOCTYPE html>
<html> <html>
<head> <head>
<title>Examples - Buffer</title> <title>Examples - Buffer</title>
@ -15,38 +16,36 @@ let importObject = {};
let results = document.getElementById('results'); let results = document.getElementById('results');
function log(txt)
{
let span = document.createElement('span');
span.innerHTML = txt;
results.appendChild(span);
let br = document.createElement('br');
results.appendChild(br);
}
WebAssembly.instantiateStreaming(fetch('buffer.wasm'), importObject) WebAssembly.instantiateStreaming(fetch('buffer.wasm'), importObject)
.then(app => { .then(app => {
// Allocate room within the memory of the WebAssembly class // Allocate room within the memory of the WebAssembly class
let size = 8; let size = 8;
let offset = app.instance.exports.___new_reference___(4 * size);
var i32 = new Uint32Array(app.instance.exports.memory.buffer, offset, size); // TODO: Use bytes constructor
let offset = app.instance.exports.___new_reference___(size);
new Uint32Array(app.instance.exports.memory.buffer, offset, 1)[0] = size;
var i8arr = new Uint8Array(app.instance.exports.memory.buffer, offset + 4, size);
//Fill it //Fill it
let sum = 0; let sum = 0;
for (var i = 0; i < size; i++) { for (var i = 0; i < size; i++) {
i32[i] = i; i8arr[i] = i + 5;
sum += i; sum += i8arr[i];
let from_wasm = app.instance.exports.index(offset, i);
log('i8arr[' + i + '] = ' + from_wasm);
} }
{ log('expected result = ' + sum);
let span = document.createElement('span'); log('actual result = ' + app.instance.exports.sum(offset));
span.innerHTML = 'expected result = ' + sum;
results.appendChild(span);
let br = document.createElement('br');
results.appendChild(br);
}
{
let span = document.createElement('span');
span.innerHTML = 'actual result = ' + app.instance.exports.sum(offset);
results.appendChild(span);
let br = document.createElement('br');
results.appendChild(br);
}
for (var i = 0; i < size; i++) {
console.log(i32[i]);
}
}); });
</script> </script>

4
examples/buffer.py
View File

@ -1,3 +1,7 @@
@exported @exported
def sum() -> i32: # TODO: Should be [i32] -> i32 def sum() -> i32: # TODO: Should be [i32] -> i32
return 0 # TODO: Implement me return 0 # TODO: Implement me
@exported
def index(inp: bytes, idx: i32) -> i32:
return inp[idx]

5
py2wasm/compiler.py
View File

@ -140,11 +140,8 @@ def expression(inp: ourlang.Expression) -> Statements:
if not isinstance(inp.type, ourlang.OurTypeUInt8): if not isinstance(inp.type, ourlang.OurTypeUInt8):
raise NotImplementedError(inp, inp.type) raise NotImplementedError(inp, inp.type)
if not isinstance(inp.offset, int):
raise NotImplementedError(inp, inp.offset)
yield from expression(inp.varref) yield from expression(inp.varref)
yield wasm.Statement('i32.const', str(inp.offset)) yield from expression(inp.index)
yield wasm.Statement('call', '$___access_bytes_index___') yield wasm.Statement('call', '$___access_bytes_index___')
return return

33
py2wasm/ourlang.py
View File

@ -331,19 +331,19 @@ class AccessBytesIndex(Expression):
""" """
Access a bytes index for reading Access a bytes index for reading
""" """
__slots__ = ('varref', 'offset', ) __slots__ = ('varref', 'index', )
varref: VariableReference varref: VariableReference
offset: int index: Expression
def __init__(self, type_: OurType, varref: VariableReference, offset: int) -> None: def __init__(self, type_: OurType, varref: VariableReference, index: Expression) -> None:
super().__init__(type_) super().__init__(type_)
self.varref = varref self.varref = varref
self.offset = offset self.index = index
def render(self) -> str: def render(self) -> str:
return f'{self.varref.render()}[{self.offset}]' return f'{self.varref.render()}[{self.index.render()}]'
class AccessStructMember(Expression): class AccessStructMember(Expression):
""" """
@ -1020,13 +1020,6 @@ class OurVisitor:
if not isinstance(node.slice, ast.Index): if not isinstance(node.slice, ast.Index):
_raise_static_error(node, 'Must subscript using an index') _raise_static_error(node, 'Must subscript using an index')
if not isinstance(node.slice.value, ast.Constant):
_raise_static_error(node, 'Must subscript using a constant index') # FIXME: Implement variable indexes
idx = node.slice.value.value
if not isinstance(idx, int):
_raise_static_error(node, 'Must subscript using a constant integer index')
if not isinstance(node.ctx, ast.Load): if not isinstance(node.ctx, ast.Load):
_raise_static_error(node, 'Must be load context') _raise_static_error(node, 'Must be load context')
@ -1034,15 +1027,23 @@ class OurVisitor:
_raise_static_error(node, f'Undefined variable {node.value.id}') _raise_static_error(node, f'Undefined variable {node.value.id}')
node_typ = our_locals[node.value.id] node_typ = our_locals[node.value.id]
slice_expr = self.visit_Module_FunctionDef_expr(
module, function, our_locals, module.types['i32'], node.slice.value,
)
if isinstance(node_typ, OurTypeBytes): if isinstance(node_typ, OurTypeBytes):
return AccessBytesIndex( return AccessBytesIndex(
module.types['u8'], module.types['u8'],
VariableReference(node_typ, node.value.id), VariableReference(node_typ, node.value.id),
idx, slice_expr,
) )
if not isinstance(node_typ, OurTypeTuple): if isinstance(node_typ, OurTypeTuple):
_raise_static_error(node, f'Cannot take index of non-tuple {node.value.id}') if not isinstance(slice_expr, ConstantInt32):
_raise_static_error(node, 'Must subscript using a constant index')
idx = slice_expr.value
if len(node_typ.members) <= idx: if len(node_typ.members) <= idx:
_raise_static_error(node, f'Index {idx} out of bounds for tuple {node.value.id}') _raise_static_error(node, f'Index {idx} out of bounds for tuple {node.value.id}')
@ -1056,6 +1057,8 @@ class OurVisitor:
member, member,
) )
_raise_static_error(node, f'Cannot take index of {node_typ.render()} {node.value.id}')
def visit_Module_FunctionDef_Constant(self, module: Module, function: Function, exp_type: OurType, node: ast.Constant) -> Expression: def visit_Module_FunctionDef_Constant(self, module: Module, function: Function, exp_type: OurType, node: ast.Constant) -> Expression:
del module del module
del function del function