T0b1/wasmtime
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Implement the memory.copy instruction from the bulk memory proposal

Browse Source
This commit is contained in:
Nick Fitzgerald
2020-02-19 15:37:49 -08:00
parent cb97e4ec8e
commit 98ecef1700
7 changed files with 445 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files

36
crates/runtime/src/libcalls.rs
View File

@@ -262,3 +262,39 @@ pub unsafe extern "C" fn wasmtime_elem_drop(vmctx: *mut VMContext, elem_index: u
let instance = (&mut *vmctx).instance();
instance.elem_drop(elem_index);
}
/// Implementation of `memory.copy` for locally defined memories.
#[no_mangle]
pub unsafe extern "C" fn wasmtime_memory_copy(
vmctx: *mut VMContext,
memory_index: u32,
dst: u32,
src: u32,
len: u32,
source_loc: u32,
) {
let memory_index = DefinedMemoryIndex::from_u32(memory_index);
let source_loc = ir::SourceLoc::new(source_loc);
let instance = (&mut *vmctx).instance();
if let Err(trap) = instance.defined_memory_copy(memory_index, dst, src, len, source_loc) {
raise_lib_trap(trap);
}
}
/// Implementation of `memory.copy` for imported memories.
#[no_mangle]
pub unsafe extern "C" fn wasmtime_imported_memory_copy(
vmctx: *mut VMContext,
memory_index: u32,
dst: u32,
src: u32,
len: u32,
source_loc: u32,
) {
let memory_index = MemoryIndex::from_u32(memory_index);
let source_loc = ir::SourceLoc::new(source_loc);
let instance = (&mut *vmctx).instance();
if let Err(trap) = instance.imported_memory_copy(memory_index, dst, src, len, source_loc) {
raise_lib_trap(trap);
}
}