diff options
| -rw-r--r-- | ChangeLog | 6 | ||||
| -rw-r--r-- | sysdeps/powerpc/fpu/fesetenv.c | 12 |
2 files changed, 10 insertions, 8 deletions
@@ -1,5 +1,11 @@ 2019-08-28 Paul A. Clarke <pc@us.ibm.com> + * sysdeps/powerpc/fpu/fesetenv.c (__fesetenv): Utilize lightweight + FPSCR read. + (_FPU_MASK_ALL): Delete. + +2019-08-28 Paul A. Clarke <pc@us.ibm.com> + * sysdeps/powerpc/fpu/fenv_private.h (libc_feholdsetround_ppc_ctx): Utilize lightweight FPSCR read if possible, set fewer FPSCR bits if possible. diff --git a/sysdeps/powerpc/fpu/fesetenv.c b/sysdeps/powerpc/fpu/fesetenv.c index 009a4f0..5ca15c7 100644 --- a/sysdeps/powerpc/fpu/fesetenv.c +++ b/sysdeps/powerpc/fpu/fesetenv.c @@ -19,8 +19,6 @@ #include <fenv_libc.h> #include <fpu_control.h> -#define _FPU_MASK_ALL (_FPU_MASK_ZM | _FPU_MASK_OM | _FPU_MASK_UM | _FPU_MASK_XM | _FPU_MASK_IM) - int __fesetenv (const fenv_t *envp) { @@ -28,25 +26,23 @@ __fesetenv (const fenv_t *envp) /* get the currently set exceptions. */ new.fenv = *envp; - old.fenv = fegetenv_register (); - if (old.l == new.l) - return 0; + old.fenv = fegetenv_status (); /* If the old env has no enabled exceptions and the new env has any enabled exceptions, then unmask SIGFPE in the MSR FE0/FE1 bits. This will put the hardware into "precise mode" and may cause the FPU to run slower on some hardware. */ - if ((old.l & _FPU_MASK_ALL) == 0 && (new.l & _FPU_MASK_ALL) != 0) + if ((old.l & FPSCR_ENABLES_MASK) == 0 && (new.l & FPSCR_ENABLES_MASK) != 0) (void) __fe_nomask_env_priv (); /* If the old env had any enabled exceptions and the new env has no enabled exceptions, then mask SIGFPE in the MSR FE0/FE1 bits. This may allow the FPU to run faster because it always takes the default action and can not generate SIGFPE. */ - if ((old.l & _FPU_MASK_ALL) != 0 && (new.l & _FPU_MASK_ALL) == 0) + if ((old.l & FPSCR_ENABLES_MASK) != 0 && (new.l & FPSCR_ENABLES_MASK) == 0) (void)__fe_mask_env (); - fesetenv_register (*envp); + fesetenv_register (new.fenv); /* Success. */ return 0; |