math: compile math functions for Xous

This adds support for Xous, enabling users to call math functions on
primitives such as `cos()`.

Signed-off-by: Sean Cross <sean@xobs.io>

Author: xobs

src/lib.rs

@@ -46,6 +46,7 @@ pub mod int;
     all(target_family = "wasm", target_os = "unknown"),
     all(target_arch = "x86_64", target_os = "uefi"),
     all(target_arch = "arm", target_os = "none"),
+    target_os = "xous",
     all(target_vendor = "fortanix", target_env = "sgx")
 ))]
 pub mod math;

src/math.rs

@@ -20,6 +20,7 @@ macro_rules! no_mangle {
         target_os = "unknown",
         not(target_env = "wasi")
     ),
+    target_os = "xous",
     all(target_arch = "x86_64", target_os = "uefi"),
     all(target_arch = "xtensa", target_os = "none"),
     all(target_vendor = "fortanix", target_env = "sgx")
@@ -70,6 +71,7 @@ no_mangle! {
         target_os = "unknown",
         not(target_env = "wasi")
     ),
+    target_os = "xous",
     all(target_arch = "xtensa", target_os = "none"),
     all(target_vendor = "fortanix", target_env = "sgx")
 ))]
@@ -93,7 +95,16 @@ no_mangle! {
     fn tanf(n: f32) -> f32;
 }
 
-#[cfg(all(target_vendor = "fortanix", target_env = "sgx"))]
+#[cfg(target_os = "xous")]
+no_mangle! {
+    fn sqrtf(x: f32) -> f32;
+    fn sqrt(x: f64) -> f64;
+}
+
+#[cfg(any(
+    all(target_vendor = "fortanix", target_env = "sgx"),
+    target_os = "xous"
+))]
 no_mangle! {
     fn ceil(x: f64) -> f64;
     fn ceilf(x: f32) -> f32;