Disable broken powerpc64 test due to rust-lang/rust#88520

Author: Amanieu

testcrate/tests/cmp.rs

@@ -22,6 +22,8 @@ macro_rules! cmp {
     };
 }
 
+// PowerPC tests are failing on LLVM 13: https://github.com/rust-lang/rust/issues/88520
+#[cfg(not(target_arch = "powerpc64"))]
 #[test]
 fn float_comparisons() {
     use compiler_builtins::float::cmp::{

testcrate/tests/conv.rs

@@ -95,6 +95,8 @@ macro_rules! f_to_i {
     };
 }
 
+// PowerPC tests are failing on LLVM 13: https://github.com/rust-lang/rust/issues/88520
+#[cfg(not(target_arch = "powerpc64"))]
 #[test]
 fn float_to_int() {
     use compiler_builtins::float::conv::{

testcrate/tests/misc.rs

@@ -111,6 +111,8 @@ macro_rules! extend {
     };
 }
 
+// PowerPC tests are failing on LLVM 13: https://github.com/rust-lang/rust/issues/88520
+#[cfg(not(target_arch = "powerpc64"))]
 #[test]
 fn float_extend() {
     use compiler_builtins::float::extend::__extendsfdf2;