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wasm: Implement 'memcpy' instruction

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This implements the `memcpy` instruction and also updates the inline memcpy calls
to make use of the same implementation. We use the fast-loop when the length is comptime known,
and use a runtime loop when the length is runtime known.
We also perform feature-dection to emit a simply wasm memory.copy instruction when the feature
'bulk-memory' is enabled. (off by default).
This commit is contained in:
Luuk de Gram
2022-03-16 21:06:02 +01:00
parent 291f5055f4
commit eafdc5562f
2 changed files with 138 additions and 23 deletions
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test/behavior/basic.zig
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@@ -340,7 +340,6 @@ fn f2(x: bool) []const u8 {
test "memcpy and memset intrinsics" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
try testMemcpyMemset();
// TODO add comptime test coverage