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authorRichard Henderson <rth@twiddle.net>2012-03-10 08:53:05 -0800
committerRichard Henderson <rth@twiddle.net>2012-03-19 06:50:41 -0700
commit0fe0f1f86f82f9e08ca4d4b85111de03f4c2f876 (patch)
treeb7daee8ebf19cc6f493921a1862408ef166b6b14 /sysdeps/generic
parenteb92c487b35e26aa1e08815c4480d0bc5cc9f370 (diff)
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Create and use libc_feupdateenv_test.
We can reduce the number of STMXCSR, and often we can avoid the
call to __feraiseexcept.
Diffstat (limited to 'sysdeps/generic')
-rw-r--r--sysdeps/generic/math_private.h18
1 files changed, 18 insertions, 0 deletions
diff --git a/sysdeps/generic/math_private.h b/sysdeps/generic/math_private.h
index 0b945f9afc..813ad93611 100644
--- a/sysdeps/generic/math_private.h
+++ b/sysdeps/generic/math_private.h
@@ -457,6 +457,24 @@ default_libc_feupdateenv (fenv_t *e)
 # define libc_feupdateenv_53bit libc_feupdateenv
 #endif
 
+static __always_inline int
+default_libc_feupdateenv_test (fenv_t *e, int ex)
+{
+  int ret = fetestexcept (ex);
+  feupdateenv (e);
+  return ret;
+}
+
+#ifndef libc_feupdateenv_test
+# define libc_feupdateenv_test  default_libc_feupdateenv_test
+#endif
+#ifndef libc_feupdateenv_testf
+# define libc_feupdateenv_testf default_libc_feupdateenv_test
+#endif
+#ifndef libc_feupdateenv_testl
+# define libc_feupdateenv_testl default_libc_feupdateenv_test
+#endif
+
 /* Save and set the rounding mode.  The use of fenv_t to store the old mode
    allows a target-specific version of this function to avoid converting the
    rounding mode from the fpu format.  By default we have no choice but to