feat: Trunc opcodes

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

4 files changed, 20 insertions, 5 deletions

diff --git a/crates/tinywasm/src/runtime/executor/macros.rs b/crates/tinywasm/src/runtime/executor/macros.rs
index 48c50f4..c1bb50f 100644
--- a/crates/tinywasm/src/runtime/executor/macros.rs
+++ b/crates/tinywasm/src/runtime/executor/macros.rs
@@ -198,6 +198,12 @@ macro_rules! arithmetic_single {
         let result = a.$op();
         $stack.values.push((result as $ty).into());
     }};
+
+    ($op:ident, $from:ty, $to:ty, $stack:ident) => {{
+        let a: $from = $stack.values.pop()?.into();
+        let result = a.$op();
+        $stack.values.push((result as $to).into());
+    }};
 }
 
 /// Apply an arithmetic operation to two values on the stack with error checking
diff --git a/crates/tinywasm/src/runtime/executor/mod.rs b/crates/tinywasm/src/runtime/executor/mod.rs
index d6189d2..3df4498 100644
--- a/crates/tinywasm/src/runtime/executor/mod.rs
+++ b/crates/tinywasm/src/runtime/executor/mod.rs
@@ -555,6 +555,15 @@ fn exec_one(
             stack.values.push(table.borrow().size().into());
         }
 
+        I32TruncSatF32S => arithmetic_single!(trunc, f32, i32, stack),
+        I32TruncSatF32U => arithmetic_single!(trunc, f32, u32, stack),
+        I32TruncSatF64S => arithmetic_single!(trunc, f64, i32, stack),
+        I32TruncSatF64U => arithmetic_single!(trunc, f64, u32, stack),
+        I64TruncSatF32S => arithmetic_single!(trunc, f32, i64, stack),
+        I64TruncSatF32U => arithmetic_single!(trunc, f32, u64, stack),
+        I64TruncSatF64S => arithmetic_single!(trunc, f64, i64, stack),
+        I64TruncSatF64U => arithmetic_single!(trunc, f64, u64, stack),
+
         i => {
             log::error!("unimplemented instruction: {:?}", i);
             return Err(Error::UnsupportedFeature(alloc::format!(
diff --git a/crates/tinywasm/tests/generated/mvp.csv b/crates/tinywasm/tests/generated/mvp.csv
index 8e32549..344b8fb 100644
--- a/crates/tinywasm/tests/generated/mvp.csv
+++ b/crates/tinywasm/tests/generated/mvp.csv
@@ -2,4 +2,4 @@
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index ed5df2e..5e3f57b 100644
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