Ignore some failing test on wasm32-unknown-emscripten

See #42629 and #42630.

src/libcore/tests/num/dec2flt/mod.rs

@@ -33,6 +33,7 @@ macro_rules! test_literal {
     })
 }
 
+#[cfg_attr(all(target_arch = "wasm32", target_os = "emscripten"), ignore)] // issue 42630
 #[test]
 fn ordinary() {
     test_literal!(1.0);
@@ -43,6 +44,7 @@ fn ordinary() {
     test_literal!(2.2250738585072014e-308);
 }
 
+#[cfg_attr(all(target_arch = "wasm32", target_os = "emscripten"), ignore)] // issue 42630
 #[test]
 fn special_code_paths() {
     test_literal!(36893488147419103229.0); // 2^65 - 3, triggers half-to-even with even significand

src/libcore/tests/num/dec2flt/rawfp.rs

@@ -86,6 +86,7 @@ fn rounding_overflow() {
     assert_eq!(rounded.k, adjusted_k + 1);
 }
 
+#[cfg_attr(all(target_arch = "wasm32", target_os = "emscripten"), ignore)] // issue 42630
 #[test]
 fn prev_float_monotonic() {
     let mut x = 1.0;
@@ -121,6 +122,7 @@ fn next_float_inf() {
     assert_eq!(next_float(f64::INFINITY), f64::INFINITY);
 }
 
+#[cfg_attr(all(target_arch = "wasm32", target_os = "emscripten"), ignore)] // issue 42630
 #[test]
 fn next_prev_identity() {
     for &x in &SOME_FLOATS {
@@ -131,6 +133,7 @@ fn next_prev_identity() {
     }
 }
 
+#[cfg_attr(all(target_arch = "wasm32", target_os = "emscripten"), ignore)] // issue 42630
 #[test]
 fn next_float_monotonic() {
     let mut x = 0.49999999999999;

src/libcore/tests/num/flt2dec/strategy/dragon.rs

@@ -24,6 +24,7 @@ fn test_mul_pow10() {
     }
 }
 
+#[cfg_attr(all(target_arch = "wasm32", target_os = "emscripten"), ignore)] // issue 42630
 #[test]
 fn shortest_sanity_test() {
     f64_shortest_sanity_test(format_shortest);

src/libcore/tests/num/flt2dec/strategy/grisu.rs

@@ -38,6 +38,7 @@ fn test_max_pow10_no_more_than() {
 }
 
 
+#[cfg_attr(all(target_arch = "wasm32", target_os = "emscripten"), ignore)] // issue 42630
 #[test]
 fn shortest_sanity_test() {
     f64_shortest_sanity_test(format_shortest);

src/libcore/tests/num/mod.rs

@@ -169,6 +169,7 @@ test_impl_from! { test_u16f64, u16, f64 }
 test_impl_from! { test_u32f64, u32, f64 }
 
 // Float -> Float
+#[cfg_attr(all(target_arch = "wasm32", target_os = "emscripten"), ignore)] // issue 42630
 #[test]
 fn test_f32f64() {
     use core::f32;