fixup! Add support for f128 integer exponentiation

Author: tgross35

testcrate/src/lib.rs

@@ -337,3 +337,12 @@ macro_rules! apfloat_fallback {
         $apfloat_op($($arg),+)
     }};
 }
+
+// FIXME(f16_f128): MSVC is unable to link the mul and div symbols required for this test.
+// `__multf3` is now available in nightly, but `__divtf3` is not yet. Provide a fallback until
+// that happens.
+#[no_mangle]
+// #[cfg(target_env = "msvc")]
+pub extern "C" fn __divtf3(a: f128, b: f128) -> f128 {
+    compiler_builtins::float::div::__divtf3(a, b)
+}

testcrate/tests/float_pow.rs

@@ -68,11 +68,3 @@ pow! {
 pow! {
     f128, 1e-36, __powikf2, not(feature = "no-sys-f128");
 }
-
-// FIXME(f16_f128): MSVC is unable to link the mul and div symbols required for this test.
-
-#[no_mangle]
-#[cfg(target_env = "msvc")]
-pub extern "C" fn __divtf3(a: f128, b: f128) -> f128 {
-    compiler_builtins::float::div::__divtf3(a, b)
-}