3 files changed, 26 insertions, 12 deletions
diff --git a/crates/tinywasm/src/error.rs b/crates/tinywasm/src/error.rs
index e0510b2..1d488d8 100644
--- a/crates/tinywasm/src/error.rs
+++ b/crates/tinywasm/src/error.rs
@@ -1,6 +1,7 @@
 use alloc::string::{String, ToString};
 use alloc::vec::Vec;
 use core::{fmt::Display, ops::ControlFlow};
+use tinywasm_types::archive::TwasmError;
 use tinywasm_types::FuncType;
 
 #[cfg(feature = "parser")]
@@ -8,6 +9,7 @@ pub use tinywasm_parser::ParseError;
 
 /// Errors that can occur for `TinyWasm` operations
 #[derive(Debug)]
+#[non_exhaustive]
 pub enum Error {
     /// A WebAssembly trap occurred
     Trap(Trap),
@@ -41,7 +43,10 @@ pub enum Error {
 
     #[cfg(feature = "parser")]
     /// A parsing error occurred
-    ParseError(ParseError),
+    Parser(ParseError),
+
+    /// A serialization error occurred
+    Twasm(TwasmError),
 }
 
 #[derive(Debug)]
@@ -169,6 +174,11 @@ impl From<LinkingError> for Error {
     }
 }
 
+impl From<TwasmError> for Error {
+    fn from(value: TwasmError) -> Self {
+        Self::Twasm(value)
+    }
+}
 impl From<Trap> for Error {
     fn from(value: Trap) -> Self {
         Self::Trap(value)
@@ -179,11 +189,12 @@ impl Display for Error {
     fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
         match self {
             #[cfg(feature = "parser")]
-            Self::ParseError(err) => write!(f, "error parsing module: {err:?}"),
+            Self::Parser(err) => write!(f, "error parsing module: {err:?}"),
 
             #[cfg(feature = "std")]
             Self::Io(err) => write!(f, "I/O error: {err}"),
 
+            Self::Twasm(err) => write!(f, "serialization error: {err}"),
             Self::Trap(trap) => write!(f, "trap: {trap}"),
             Self::Linker(err) => write!(f, "linking error: {err}"),
             Self::InvalidLabelType => write!(f, "invalid label type"),
@@ -238,7 +249,7 @@ impl core::error::Error for Error {}
 #[cfg(feature = "parser")]
 impl From<tinywasm_parser::ParseError> for Error {
     fn from(value: tinywasm_parser::ParseError) -> Self {
-        Self::ParseError(value)
+        Self::Parser(value)
     }
 }
 
diff --git a/crates/tinywasm/src/interpreter/no_std_floats.rs b/crates/tinywasm/src/interpreter/no_std_floats.rs
index 5b9471e..e273184 100644
--- a/crates/tinywasm/src/interpreter/no_std_floats.rs
+++ b/crates/tinywasm/src/interpreter/no_std_floats.rs
@@ -1,34 +1,25 @@
 pub(super) trait NoStdFloatExt {
     fn round(self) -> Self;
-    fn abs(self) -> Self;
-    fn signum(self) -> Self;
     fn ceil(self) -> Self;
     fn floor(self) -> Self;
     fn trunc(self) -> Self;
     fn sqrt(self) -> Self;
-    fn copysign(self, other: Self) -> Self;
 }
 
 #[rustfmt::skip]
 impl NoStdFloatExt for f64 {
     #[inline] fn round(self) -> Self { libm::round(self) }
-    #[inline] fn abs(self) -> Self { libm::fabs(self) }
-    #[inline] fn signum(self) -> Self { libm::copysign(1.0, self) }
     #[inline] fn ceil(self) -> Self { libm::ceil(self) }
     #[inline] fn floor(self) -> Self { libm::floor(self) }
     #[inline] fn trunc(self) -> Self { libm::trunc(self) }
     #[inline] fn sqrt(self) -> Self { libm::sqrt(self) }
-    #[inline] fn copysign(self, other: Self) -> Self { libm::copysign(self, other) }
 }
 
 #[rustfmt::skip]
 impl NoStdFloatExt for f32 {
     #[inline] fn round(self) -> Self { libm::roundf(self) }
-    #[inline] fn abs(self) -> Self { libm::fabsf(self) }
-    #[inline] fn signum(self) -> Self { libm::copysignf(1.0, self) }
     #[inline] fn ceil(self) -> Self { libm::ceilf(self) }
     #[inline] fn floor(self) -> Self { libm::floorf(self) }
     #[inline] fn trunc(self) -> Self { libm::truncf(self) }
     #[inline] fn sqrt(self) -> Self { libm::sqrtf(self) }
-    #[inline] fn copysign(self, other: Self) -> Self { libm::copysignf(self, other) }
 }
diff --git a/crates/types/src/lib.rs b/crates/types/src/lib.rs
index 81eec13..d9f2234 100644
--- a/crates/types/src/lib.rs
+++ b/crates/types/src/lib.rs
@@ -45,6 +45,18 @@ pub use value::*;
 #[cfg(feature = "archive")]
 pub mod archive;
 
+#[cfg(not(feature = "archive"))]
+pub mod archive {
+    #[derive(Debug)]
+    pub enum TwasmError {}
+    impl core::fmt::Display for TwasmError {
+        fn fmt(&self, _: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
+            Err(core::fmt::Error)
+        }
+    }
+    impl core::error::Error for TwasmError {}
+}
+
 /// A `TinyWasm` WebAssembly Module
 ///
 /// This is the internal representation of a WebAssembly module in `TinyWasm`.