Add a benchmark for __powitf2

Author: tgross35

testcrate/benches/float_pow.rs

@@ -1,5 +1,7 @@
+#![cfg_attr(f128_enabled, feature(f128))]
+
 use compiler_builtins::float::pow;
-use criterion::{criterion_group, criterion_main, Criterion};
+use criterion::{criterion_main, Criterion};
 use testcrate::float_bench;
 
 float_bench! {
@@ -20,5 +22,28 @@ float_bench! {
     asm: [],
 }
 
-criterion_group!(float_add, powi_f32, powi_f64);
-criterion_main!(float_add);
+#[cfg(f128_enabled)]
+float_bench! {
+    name: powi_f128,
+    sig: (a: f128, b: i32) -> f128,
+    crate_fn: pow::__powitf2,
+    crate_fn_ppc: pow::__powikf2,
+    sys_fn: __powitf2,
+    sys_fn_ppc: __powikf2,
+    sys_available: not(feature = "no-sys-f128"),
+    asm: []
+}
+
+pub fn float_pow() {
+    let mut criterion = Criterion::default().configure_from_args();
+
+    powi_f32(&mut criterion);
+    powi_f64(&mut criterion);
+
+    #[cfg(f128_enabled)]
+    {
+        powi_f128(&mut criterion);
+    }
+}
+
+criterion_main!(float_pow);

testcrate/src/bench.rs

@@ -359,3 +359,5 @@ impl_testio!(int i16, i32, i64, i128);
 impl_testio!(int u16, u32, u64, u128);
 impl_testio!((float, int)(f32, i32));
 impl_testio!((float, int)(f64, i32));
+#[cfg(f128_enabled)]
+impl_testio!((float, int)(f128, i32));

testcrate/tests/float_pow.rs

@@ -56,8 +56,6 @@ pow! {
 }
 
 #[cfg(f128_enabled)]
-// Windows can't link the required arithmetic functions. See
-// <https://github.com/rust-lang/compiler-builtins/pull/614#issuecomment-2118636613>
 #[cfg(not(any(target_arch = "powerpc", target_arch = "powerpc64")))]
 pow! {
     f128, 1e-36, __powitf2;