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authorChris Metcalf <cmetcalf@tilera.com>2012-05-17 08:49:19 -0400
committerChris Metcalf <cmetcalf@tilera.com>2012-05-17 08:50:41 -0400
commit0af797def371ceb4f05586d7bcd25841653d2082 (patch)
tree3aa5591836c95fba6b694fb45c1421bf0025de91 /stdlib
parente39745ffa030f685fbba13534a3023d52a27ead8 (diff)
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math: support platforms with limited FP rounding or exception support
For some tests, just claim that fetestexcept() always returns true,
so the rest of the test can be compiled.

For libm-test, provide known bogus values for unsupported rounding
modes, so fesetround() will return failure.

Elsewhere, just add some #ifdefs to avoid code that uses particular
FP exceptions if the exceptions aren't supported.
Diffstat (limited to 'stdlib')
-rw-r--r--stdlib/bug-getcontext.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/stdlib/bug-getcontext.c b/stdlib/bug-getcontext.c
index 745aa1f207..7db49c8499 100644
--- a/stdlib/bug-getcontext.c
+++ b/stdlib/bug-getcontext.c
@@ -9,6 +9,9 @@
 static int
 do_test (void)
 {
+#if FE_ALL_EXCEPT == 0
+  printf("Skipping test; no support for FP exceptions.\n");
+#else
   int except_mask =  FE_DIVBYZERO | FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW;
   int status = feenableexcept (except_mask);
 
@@ -41,6 +44,7 @@ do_test (void)
 
   printf("\nAt end fegetexcept() returned %d, expected: %d.\n",
 	 mask, except_mask);
+#endif
   return 0;
 }