chore: refactor simd code in preparation for x86 intrinsics

Signed-off-by: Henry <mail@henrygressmann.de>

Author: explodingcamera

crates/tinywasm/Cargo.toml

@@ -51,6 +51,11 @@ canonicalize_nans=[]
 # derive Debug for runtime/types structs
 debug=["tinywasm-types/debug"]
 
+# enable x86-specific SIMD intrinsics in Value128
+# note: for x86 backend selection, compile with x86-64-v3 target features
+# (for example: `RUSTFLAGS="-C target-cpu=x86-64-v3"`)
+simd-x86=[]
+
 [[test]]
 name="test-wasm-1"
 harness=false

crates/tinywasm/src/interpreter/mod.rs

@@ -1,14 +1,14 @@
 pub(crate) mod executor;
 pub(crate) mod num_helpers;
+pub(crate) mod simd;
 pub(crate) mod stack;
-pub(crate) mod value128;
 pub(crate) mod values;
 
 #[cfg(not(feature = "std"))]
 mod no_std_floats;
 
 use crate::{Result, Store, interpreter::stack::CallFrame};
-pub(crate) use value128::*;
+pub(crate) use simd::*;
 pub(crate) use values::*;
 
 #[derive(Clone)]