From 4012b9c4f514f8e15cf849d351fb202a66bb024e Mon Sep 17 00:00:00 2001
From: Alex Crichton <alex@alexcrichton.com>
Date: Thu, 2 May 2019 12:40:39 -0700
Subject: [PATCH] Include `ldexp*` intrinsics on the wasm target

Looks like LLVM optimizes programs like:

    fn foo(a: u8) -> f32 {
        2.0f32.powf(a as f32)
    }

to actually invoking `ldexpf`, so let's be sure to include bindings so
there's not undefined symbols.
---
 libm        | 2 +-
 src/math.rs | 2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/libm b/libm
index 3559e70..0ae4428 160000
--- a/libm
+++ b/libm
@@ -1 +1 @@
-Subproject commit 3559e703795d33e84a91da2a35f2f3baac47e872
+Subproject commit 0ae442888c7af72c0a335edd43dbbd74c751f119
diff --git a/src/math.rs b/src/math.rs
index b619555..1893f1c 100644
--- a/src/math.rs
+++ b/src/math.rs
@@ -71,6 +71,8 @@ no_mangle! {
     fn sinhf(n: f32) -> f32;
     fn tanf(n: f32) -> f32;
     fn tanhf(n: f32) -> f32;
+    fn ldexp(f: f64, n: i32) -> f64;
+    fn ldexpf(f: f32, n: i32) -> f32;
 }
 
 #[cfg(all(target_vendor = "fortanix", target_env = "sgx"))]