Fixes FP rounding issue and adds tests

The issue was caused becuase cranelift compilation assume SSE2 even for the  where as rust compiler doesn't include these instructions by default.  This means when transitioning through wasmtime libcalls the parameters are lost since wasm is using SSE2 instructions and wasmtime isn't. The more advance SSE intructions require a seperate pr in HL core that is needed to enable them.

Signed-off-by: James Sturtevant <jsturtevant@gmail.com>

Author: jsturtevant

Justfile

@@ -100,8 +100,9 @@ examples-ci target=default-target features="": (build-rust-wasm-examples target)
     cargo run {{ if features =="" {''} else {"--no-default-features -F function_call_metrics," + features } }} --profile={{ if target == "debug" {"dev"} else { target } }} --example metrics
     cargo run {{ if features =="" {"--no-default-features --features kvm,mshv3"} else {"--no-default-features -F function_call_metrics," + features } }} --profile={{ if target == "debug" {"dev"} else { target } }} --example metrics 
 
-examples-components target=default-target features="": (build-rust-component-examples target) 
-    {{ wit-world }} cargo run {{ if features =="" {''} else {"--no-default-features -F " + features } }} --profile={{ if target == "debug" {"dev"} else { target } }} --example component_example
+examples-components target=default-target features="": (build-rust-component-examples target) (build-wasm-examples target) 
+    {{ wit-world }} cargo run {{ if features =="" {''} else {"--no-default-features -F kvm -F " + features } }} --profile={{ if target == "debug" {"dev"} else { target } }} --example component_example
+    {{ wit-world-c }} cargo run {{ if features =="" {''} else {"--no-default-features -F kvm -F " + features } }} --profile={{ if target == "debug" {"dev"} else { target } }} --example c-component
 
 # warning, compares to and then OVERWRITES the given baseline
 bench-ci baseline target="release" features="":

src/hyperlight_wasm/examples/c-component/main.rs

@@ -0,0 +1,68 @@
+use examples_common::get_wasm_module_path;
+use hyperlight_wasm::SandboxBuilder;
+
+use crate::bindings::example::runcomponent::Guest;
+
+extern crate alloc;
+mod bindings {
+    hyperlight_component_macro::host_bindgen!(
+        "../../src/wasmsamples/components/runcomponent-world.wasm"
+    );
+}
+
+pub struct State {}
+impl State {
+    pub fn new() -> Self {
+        State {}
+    }
+}
+
+impl Default for State {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+impl bindings::example::runcomponent::Host for State {
+    fn r#get_time_since_boot_microsecond(&mut self) -> i64 {
+        let res = std::time::SystemTime::now()
+            .duration_since(std::time::SystemTime::UNIX_EPOCH)
+            .unwrap()
+            .as_micros();
+        i64::try_from(res).unwrap()
+    }
+}
+
+impl bindings::example::runcomponent::RuncomponentImports for State {
+    type Host = State;
+
+    fn r#host(&mut self) -> impl ::core::borrow::BorrowMut<Self::Host> {
+        self
+    }
+}
+
+fn main() {
+    let state = State::new();
+    let mut sandbox = SandboxBuilder::new()
+        .with_guest_input_buffer_size(70000000)
+        .with_guest_heap_size(200000000)
+        .with_guest_stack_size(100000000)
+        //.with_debugging_enabled(8080)
+        .build()
+        .unwrap();
+    let rt = bindings::register_host_functions(&mut sandbox, state);
+
+    let sb = sandbox.load_runtime().unwrap();
+
+    let mod_path = get_wasm_module_path("runcomponent.aot").unwrap();
+    let sb = sb.load_module(mod_path).unwrap();
+
+    let mut wrapped = bindings::RuncomponentSandbox { sb, rt };
+    let instance = bindings::example::runcomponent::RuncomponentExports::guest(&mut wrapped);
+    let echo = instance.echo("Hello World!".to_string());
+    println!("{}", echo);
+
+    let result = instance.round_to_nearest_int(1.331, 24.0);
+    println!("rounded result {}", result);
+    assert_eq!(result, 32);
+}

src/hyperlight_wasm/examples/helloworld/main.rs

@@ -83,5 +83,37 @@ fn main() -> Result<()> {
             );
         }
     }
+
+    let tests = [
+        (1.331, 24.0, 32),
+        (3.14159, 2.71828, 9),
+        (-5.7, 10.3, -59),
+        (0.0, 0.0, 0),
+        (99.999, 0.001, 0),
+        (-3.14, -2.86, 9),
+        (1.5, 1.5, 2),
+    ];
+    let mut sandbox = SandboxBuilder::new().build()?;
+    sandbox
+        .register(
+            "GetTimeSinceBootMicrosecond",
+            get_time_since_boot_microsecond,
+        )
+        .unwrap();
+    let wasm_sandbox = sandbox.load_runtime()?;
+    let mod_path = get_wasm_module_path("RunWasm.aot")?;
+    let mut loaded_wasm_sandbox = wasm_sandbox.load_module(mod_path)?;
+    let snapshot = loaded_wasm_sandbox.snapshot()?;
+
+    for (idx, case) in tests.iter().enumerate() {
+        let (a, b, expected_result): (f32, f32, i32) = *case;
+        let result: i32 = loaded_wasm_sandbox.call_guest_function("RoundToNearestInt", (a, b))?;
+        assert_eq!(
+            result, expected_result,
+            "RoundToInt test case {idx} failed: got {}, expected {}",
+            result, expected_result
+        );
+        loaded_wasm_sandbox.restore(&snapshot)?
+    }
     Ok(())
 }

src/wasm_runtime/.cargo/config.toml

@@ -7,6 +7,8 @@ rustflags = [
   "code-model=small",
   "-C",
   "link-args=-e entrypoint",
+  "-C",
+  "target-feature=-soft-float,+sse,+sse2"
 ]
 linker = "rust-lld"
 

src/wasmsamples/RunWasm.c

@@ -20,6 +20,7 @@ limitations under the License.
 #include <limits.h>
 #include <stdint.h>
 #include <ctype.h>
+#include <math.h>
 
 int HostPrint(char* msg); // Implementation of this will be available in the native host
 
@@ -129,3 +130,12 @@ int KeepCPUBusy(int ms)
     printf("Kept CPU busy for %d ms using %d iterations of fib(10) %d|toreach max = %d|", ms, iter, INT_MAX, INT_MAX-iter);
     return ms;
 }
+
+__attribute__((export_name("RoundToNearestInt"))) 
+int RoundToNearestInt(float a, float b)
+{
+    float c = a*b;
+    float r = lrintf(c);
+    printf("rounded answer: %f\n", r);
+    return r;
+}

src/wasmsamples/components/runcomponent.c

@@ -1,11 +1,19 @@
 #include "bindings/runcomponent.h"
 #include <stdlib.h>
 #include <string.h>
+#include <math.h>
 
 void exports_example_runcomponent_guest_echo(runcomponent_string_t *msg, runcomponent_string_t *ret)
 {
   ret->len = msg->len;
   ret->ptr = (uint8_t *) malloc(ret->len);
   memcpy(ret->ptr, msg->ptr, ret->len);
   runcomponent_string_free(msg);
+}
+
+int32_t exports_example_runcomponent_guest_round_to_nearest_int(float a, float b)
+{
+    float c = a*b;
+    float r = lrintf(c);
+    return r;
 }

src/wasmsamples/components/runcomponent.wit

@@ -2,6 +2,7 @@ package example:runcomponent;
 
 interface guest {
     echo: func(msg: string) -> string;
+    round-to-nearest-int: func(a: f32, b: f32) -> s32;
 }
 
 interface host {