[libc] Make a couple of math smoke tests more robust. (#120808)

Make sure to clear out all FE_ALL_EXCEPT bits both before and after invoking function under test -- otherwise the very first check for the exception bits in the unit test may fail due to bits set prior to test invocation.
llvm · Dec 21, 2024 · 6ecedb0 · 6ecedb0
1 parent 96839a4
commit 6ecedb0
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diff --git a/libc/test/src/math/smoke/CanonicalizeTest.h b/libc/test/src/math/smoke/CanonicalizeTest.h
@@ -19,6 +19,7 @@
 #include "hdr/math_macros.h"
 
 #define TEST_SPECIAL(x, y, expected, expected_exception)                       \
+  LIBC_NAMESPACE::fputil::clear_except(FE_ALL_EXCEPT);                         \
   EXPECT_EQ(expected, f(&x, &y));                                              \
   EXPECT_FP_EXCEPTION(expected_exception);                                     \
   LIBC_NAMESPACE::fputil::clear_except(FE_ALL_EXCEPT)

diff --git a/libc/test/src/math/smoke/FModTest.h b/libc/test/src/math/smoke/FModTest.h
@@ -18,6 +18,7 @@
 #include "hdr/fenv_macros.h"
 
 #define TEST_SPECIAL(x, y, expected, dom_err, expected_exception)              \
+  LIBC_NAMESPACE::fputil::clear_except(FE_ALL_EXCEPT);                         \
   EXPECT_FP_EQ(expected, f(x, y));                                             \
   EXPECT_MATH_ERRNO((dom_err) ? EDOM : 0);                                     \
   EXPECT_FP_EXCEPTION(expected_exception);                                     \