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| author | Ian Bolton <ian.bolton@arm.com> | 2014-04-24 07:15:33 +0100 |
|---|---|---|
| committer | Marcus Shawcroft <marcus.shawcroft@linaro.org> | 2014-04-24 07:15:33 +0100 |
| commit | e5e0d9a4f632735cf3bb440eecb5caee5eea44c1 (patch) | |
| tree | 51c5774783bb0479b35a33f9a22b86db00c20cbe /sysdeps/aarch64/fpu/fsetexcptflg.c | |
| parent | bacc75f7be11656387c239831f490155f5fb3700 (diff) | |
| download | glibc-e5e0d9a4f632735cf3bb440eecb5caee5eea44c1.tar.gz glibc-e5e0d9a4f632735cf3bb440eecb5caee5eea44c1.tar.xz glibc-e5e0d9a4f632735cf3bb440eecb5caee5eea44c1.zip | |
[AArch64] Suppress unnecessary FPSR and FPCR writes.
Diffstat (limited to 'sysdeps/aarch64/fpu/fsetexcptflg.c')
| -rw-r--r-- | sysdeps/aarch64/fpu/fsetexcptflg.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/sysdeps/aarch64/fpu/fsetexcptflg.c b/sysdeps/aarch64/fpu/fsetexcptflg.c index 49cd1e467f..60bb1c9e96 100644 --- a/sysdeps/aarch64/fpu/fsetexcptflg.c +++ b/sysdeps/aarch64/fpu/fsetexcptflg.c @@ -24,16 +24,18 @@ int fesetexceptflag (const fexcept_t *flagp, int excepts) { fpu_fpsr_t fpsr; + fpu_fpsr_t fpsr_new; /* Get the current environment. */ _FPU_GETFPSR (fpsr); /* Set the desired exception mask. */ - fpsr &= ~(excepts & FE_ALL_EXCEPT); - fpsr |= (*flagp & excepts & FE_ALL_EXCEPT); + fpsr_new = fpsr & ~(excepts & FE_ALL_EXCEPT); + fpsr_new |= (*flagp & excepts & FE_ALL_EXCEPT); /* Save state back to the FPU. */ - _FPU_SETFPSR (fpsr); + if (fpsr != fpsr_new) + _FPU_SETFPSR (fpsr_new); return 0; } |