diff options
| -rw-r--r-- | ChangeLog | 6 | ||||
| -rw-r--r-- | sysdeps/powerpc/fpu/fenv_libc.h | 4 | ||||
| -rw-r--r-- | sysdeps/powerpc/fpu/fenv_private.h | 16 |
3 files changed, 24 insertions, 2 deletions
@@ -1,5 +1,11 @@ 2019-09-27 Paul A. Clarke <pc@us.ibm.com> + * sysdeps/powerpc/fpu/fenv_libc.h (FPSCR_EXCEPTIONS_MASK): New. + * sysdeps/powerpc/fpu/fenv_private.h (__libc_femergeenv_ppc): Optimize + to write FPSCR control only, if exceptions have not changed. + +2019-09-27 Paul A. Clarke <pc@us.ibm.com> + * sysdeps/powerpc/fpu/fenv_libc.h: (__TEST_AND_ENTER_NON_STOP): New. (__TEST_AND_EXIT_NON_STOP): New. diff --git a/sysdeps/powerpc/fpu/fenv_libc.h b/sysdeps/powerpc/fpu/fenv_libc.h index bc2684e08b..d5e458756a 100644 --- a/sysdeps/powerpc/fpu/fenv_libc.h +++ b/sysdeps/powerpc/fpu/fenv_libc.h @@ -256,6 +256,10 @@ enum { (FPSCR_VE_MASK|FPSCR_OE_MASK|FPSCR_UE_MASK|FPSCR_ZE_MASK|FPSCR_XE_MASK) #define FPSCR_BASIC_EXCEPTIONS_MASK \ (FPSCR_VX_MASK|FPSCR_OX_MASK|FPSCR_UX_MASK|FPSCR_ZX_MASK|FPSCR_XX_MASK) +#define FPSCR_EXCEPTIONS_MASK (FPSCR_BASIC_EXCEPTIONS_MASK| \ + FPSCR_VXSNAN_MASK|FPSCR_VXISI_MASK|FPSCR_VXIDI_MASK|FPSCR_VXZDZ_MASK| \ + FPSCR_VXIMZ_MASK|FPSCR_VXVC_MASK|FPSCR_VXSOFT_MASK|FPSCR_VXSQRT_MASK| \ + FPSCR_VXCVI_MASK) #define FPSCR_FPRF_MASK \ (FPSCR_FPRF_C_MASK|FPSCR_FPRF_FL_MASK|FPSCR_FPRF_FG_MASK| \ FPSCR_FPRF_FE_MASK|FPSCR_FPRF_FU_MASK) diff --git a/sysdeps/powerpc/fpu/fenv_private.h b/sysdeps/powerpc/fpu/fenv_private.h index 30cbf301b7..94960262dd 100644 --- a/sysdeps/powerpc/fpu/fenv_private.h +++ b/sysdeps/powerpc/fpu/fenv_private.h @@ -52,8 +52,20 @@ __libc_femergeenv_ppc (const fenv_t *envp, unsigned long long old_mask, __TEST_AND_EXIT_NON_STOP (old.l, new.l); __TEST_AND_ENTER_NON_STOP (old.l, new.l); - /* Atomically enable and raise (if appropriate) exceptions set in `new'. */ - fesetenv_register (new.fenv); + /* If requesting to keep status, replace control, and merge exceptions, + and exceptions haven't changed, we can just set new control instead + of the whole FPSCR. */ + if ((old_mask & (FPSCR_CONTROL_MASK|FPSCR_STATUS_MASK|FPSCR_EXCEPTIONS_MASK)) + == (FPSCR_STATUS_MASK|FPSCR_EXCEPTIONS_MASK) && + (new_mask & (FPSCR_CONTROL_MASK|FPSCR_STATUS_MASK|FPSCR_EXCEPTIONS_MASK)) + == (FPSCR_CONTROL_MASK|FPSCR_EXCEPTIONS_MASK) && + (old.l & FPSCR_EXCEPTIONS_MASK) == (new.l & FPSCR_EXCEPTIONS_MASK)) + { + fesetenv_mode (new.fenv); + } + else + /* Atomically enable and raise (if appropriate) exceptions set in `new'. */ + fesetenv_register (new.fenv); return old.l; } |