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| author | Wilco <wdijkstr@arm.com> | 2014-05-15 15:21:55 +0100 |
|---|---|---|
| committer | Marcus Shawcroft <marcus.shawcroft@arm.com> | 2014-05-15 15:23:27 +0100 |
| commit | c0c08d02c82275353f5c556f935a1a01714d9d7f (patch) | |
| tree | c850cda3edb23e165d7d96eb9d82fdc74b5554f1 /sysdeps/arm/fsetexcptflg.c | |
| parent | 1a2f40e5d14ed6450696feacf04fca5eeceae7ef (diff) | |
| download | glibc-c0c08d02c82275353f5c556f935a1a01714d9d7f.zip glibc-c0c08d02c82275353f5c556f935a1a01714d9d7f.tar.gz glibc-c0c08d02c82275353f5c556f935a1a01714d9d7f.tar.bz2 | |
ARM: Improve fenv implementation
Diffstat (limited to 'sysdeps/arm/fsetexcptflg.c')
| -rw-r--r-- | sysdeps/arm/fsetexcptflg.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/sysdeps/arm/fsetexcptflg.c b/sysdeps/arm/fsetexcptflg.c index 1a610ff..28810d3 100644 --- a/sysdeps/arm/fsetexcptflg.c +++ b/sysdeps/arm/fsetexcptflg.c @@ -25,19 +25,22 @@ int fesetexceptflag (const fexcept_t *flagp, int excepts) { - fpu_control_t fpscr; + fpu_control_t fpscr, new_fpscr; /* Fail if a VFP unit isn't present unless nothing needs to be done. */ if (!ARM_HAVE_VFP) return (excepts != 0); _FPU_GETCW (fpscr); + excepts &= FE_ALL_EXCEPT; /* Set the desired exception mask. */ - fpscr &= ~(excepts & FE_ALL_EXCEPT); - fpscr |= (*flagp & excepts & FE_ALL_EXCEPT); + new_fpscr = fpscr & ~excepts; + new_fpscr |= *flagp & excepts; + + /* Write new exception flags if changed. */ + if (new_fpscr != fpscr) + _FPU_SETCW (new_fpscr); - /* Save state back to the FPU. */ - _FPU_SETCW (fpscr); return 0; } |