diff options
Diffstat (limited to 'sysdeps/powerpc/fpu/feholdexcpt.c')
| -rw-r--r-- | sysdeps/powerpc/fpu/feholdexcpt.c | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/sysdeps/powerpc/fpu/feholdexcpt.c b/sysdeps/powerpc/fpu/feholdexcpt.c index 150becd678..c9432248db 100644 --- a/sysdeps/powerpc/fpu/feholdexcpt.c +++ b/sysdeps/powerpc/fpu/feholdexcpt.c @@ -22,17 +22,24 @@ int feholdexcept (fenv_t *envp) { - fenv_union_t u; + fenv_union_t old, new; - /* Get the current state. */ - u.fenv = *envp = fegetenv_register (); + /* Save the currently set exceptions. */ + old.fenv = *envp = fegetenv_register (); - /* Clear everything except for the rounding mode and non-IEEE arithmetic + /* Clear everything except for the rounding modes and non-IEEE arithmetic flag. */ - u.l[1] = u.l[1] & 7; + new.l[1] = old.l[1] & 7; + new.l[0] = old.l[0]; + + /* If the old env had any eabled 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[1] & 0x000000F8) != 0) + (void)__fe_mask_env (); /* Put the new state in effect. */ - fesetenv_register (u.fenv); + fesetenv_register (new.fenv); return 0; } |